:root {
  /* ── Light Theme (Google-style) ── */
  --bg:      #ffffff;
  --bg2:     #f8f9fa;
  --bg3:     #f1f3f4;
  --bg4:     #e8eaed;
  --bg5:     #dadce0;
  --card:    #ffffff;
  --border:  rgba(0,0,0,0.08);
  --border2: rgba(0,0,0,0.12);
  --text:    #202124;
  --text2:   #5f6368;
  --text3:   #9aa0a6;
  --accent:  #1a73e8;
  --accent2: #7c4dff;
  --gold:    #e37400;
  --silver:  #80868b;
  --bronze:  #a15c00;
  --green:   #1e8e3e;
  --red:     #d93025;
  --orange:  #e8710a;
  --teal:    #12826c;
  --pink:    #d01884;
  --shadow:  0 1px 3px rgba(60,64,67,0.15), 0 1px 2px rgba(60,64,67,0.10);
  --shadow-hover: 0 2px 8px rgba(60,64,67,0.20), 0 4px 16px rgba(60,64,67,0.10);
  --font:    'Kanit', sans-serif;
  --font2:   'Sarabun', 'Noto Sans Thai', sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font2);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}
h1,h2,h3,h4,h5 { font-family: var(--font); }

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--bg5); border-radius: 3px; }

/* ─── UTILITY ─── */
.hidden { display: none !important; }
.page { display: none; min-height: 100vh; }
.page.active { display: block; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-1 { gap: 8px; } .gap-2 { gap: 16px; } .gap-3 { gap: 24px; }
.mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; }
.mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; }
.text-gold { color: var(--gold); }
.text-accent { color: var(--accent); }
.text-green { color: var(--green); }
.text-red { color: var(--red); }
.text-muted { color: var(--text2); }
.text-center { text-align: center; }
.font-kanit { font-family: var(--font); }

/* ─── BUTTONS (Game Style) ─── */
@keyframes btnShine { 0%{background-position:200% center;} 100%{background-position:-200% center;} }
@keyframes btnPulseGlow { 0%,100%{box-shadow:0 0 8px rgba(79,142,247,0.3);} 50%{box-shadow:0 0 18px rgba(79,142,247,0.6);} }
@keyframes btnPress { 0%{transform:scale(1);} 50%{transform:scale(0.95);} 100%{transform:scale(1);} }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 11px 24px; border-radius: 12px; border: none; cursor: pointer; font-family: var(--font); font-size: 14px; font-weight: 600; transition: all 0.25s cubic-bezier(.4,.0,.2,1); letter-spacing: 0.3px; position: relative; overflow: hidden; text-shadow: 0 1px 2px rgba(0,0,0,0.15); }
.btn::after { content:''; position:absolute; inset:0; background:linear-gradient(105deg,transparent 40%,rgba(255,255,255,0.25) 50%,transparent 60%); background-size:200% 100%; opacity:0; transition:opacity 0.3s; pointer-events:none; }
.btn:hover::after { opacity:1; animation:btnShine 0.8s ease-out; }
.btn:active:not(:disabled) { animation:btnPress 0.2s ease; }
.btn-primary { background: linear-gradient(135deg,#4f8ef7 0%,#1a73e8 50%,#1557b0 100%); color:#fff; box-shadow: 0 4px 15px rgba(26,115,232,0.35), inset 0 1px 0 rgba(255,255,255,0.2); }
.btn-primary:hover { background: linear-gradient(135deg,#6ba3ff 0%,#3d8af7 50%,#1a73e8 100%); transform: translateY(-2px) scale(1.02); box-shadow: 0 6px 20px rgba(26,115,232,0.45), inset 0 1px 0 rgba(255,255,255,0.25); }
.btn-purple { background: linear-gradient(135deg,#9b7dff 0%,#7c4dff 50%,#5e35b1 100%); color:#fff; box-shadow: 0 4px 15px rgba(124,77,255,0.35), inset 0 1px 0 rgba(255,255,255,0.2); }
.btn-purple:hover { background: linear-gradient(135deg,#b49aff 0%,#9470ff 50%,#7c4dff 100%); transform: translateY(-2px) scale(1.02); box-shadow: 0 6px 20px rgba(124,77,255,0.45); }
.btn-gold { background: linear-gradient(135deg,#ffb347 0%,#e37400 50%,#c96200 100%); color:#fff; font-weight:700; box-shadow: 0 4px 15px rgba(227,116,0,0.4), inset 0 1px 0 rgba(255,255,255,0.25); }
.btn-gold:hover { background: linear-gradient(135deg,#ffc56e 0%,#f09000 50%,#e37400 100%); transform: translateY(-2px) scale(1.02); box-shadow: 0 6px 22px rgba(227,116,0,0.5); }
.btn-outline { background: rgba(255,255,255,0.8); color: var(--text); border: 2px solid var(--border2); backdrop-filter:blur(4px); text-shadow:none; }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background:rgba(26,115,232,0.06); transform: translateY(-1px); box-shadow:0 4px 12px rgba(26,115,232,0.15); }
.btn-danger { background: linear-gradient(135deg,#ff6b6b 0%,#d93025 50%,#b71c1c 100%); color:#fff; box-shadow: 0 4px 15px rgba(217,48,37,0.35), inset 0 1px 0 rgba(255,255,255,0.2); }
.btn-danger:hover { background: linear-gradient(135deg,#ff8a8a 0%,#ef5350 50%,#d93025 100%); transform: translateY(-2px) scale(1.02); box-shadow: 0 6px 20px rgba(217,48,37,0.45); }
.btn-success { background: linear-gradient(135deg,#4caf50 0%,#1e8e3e 50%,#1b6e2e 100%); color:#fff; box-shadow: 0 4px 15px rgba(30,142,62,0.35), inset 0 1px 0 rgba(255,255,255,0.2); }
.btn-success:hover { background: linear-gradient(135deg,#66bb6a 0%,#43a047 50%,#1e8e3e 100%); transform: translateY(-2px) scale(1.02); box-shadow: 0 6px 20px rgba(30,142,62,0.45); }
.btn-sm { padding: 7px 16px; font-size: 13px; border-radius:10px; }
.btn-lg { padding: 14px 32px; font-size: 16px; border-radius:14px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none !important; filter:grayscale(0.4); }

/* ─── CARDS (Game Style) ─── */
.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 20px; box-shadow: var(--shadow); position:relative; overflow:hidden; }
.card::before { content:''; position:absolute; top:0; left:-100%; width:50%; height:100%; background:linear-gradient(90deg,transparent,rgba(255,255,255,0.15),transparent); transition:left 0.5s; pointer-events:none; }
.card:hover::before { left:100%; }
.card-hover { transition: all 0.3s cubic-bezier(.4,.0,.2,1); }
.card-hover:hover { border-color: var(--accent); transform: translateY(-4px) scale(1.01); box-shadow: 0 8px 25px rgba(79,142,247,0.15), 0 0 0 1px rgba(79,142,247,0.1); }

/* ─── BADGE (Game Style) ─── */
@keyframes badgePulse { 0%,100%{transform:scale(1);} 50%{transform:scale(1.05);} }
.badge { display: inline-flex; align-items: center; padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 600; font-family: var(--font); transition: all 0.2s; }
.badge:hover { transform:scale(1.08); }
.badge-gold { background: linear-gradient(135deg,rgba(255,193,7,0.15),rgba(245,200,66,0.2)); color: var(--gold); border: 1px solid rgba(245,200,66,0.35); box-shadow:0 2px 8px rgba(245,200,66,0.15); }
.badge-blue { background: linear-gradient(135deg,rgba(79,142,247,0.1),rgba(79,142,247,0.2)); color: var(--accent); border: 1px solid rgba(79,142,247,0.35); box-shadow:0 2px 8px rgba(79,142,247,0.12); }
.badge-green { background: linear-gradient(135deg,rgba(46,204,113,0.1),rgba(46,204,113,0.2)); color: var(--green); border: 1px solid rgba(46,204,113,0.35); box-shadow:0 2px 8px rgba(46,204,113,0.12); }
.badge-red { background: linear-gradient(135deg,rgba(231,76,60,0.1),rgba(231,76,60,0.2)); color: var(--red); border: 1px solid rgba(231,76,60,0.35); box-shadow:0 2px 8px rgba(231,76,60,0.12); }
.badge-purple { background: linear-gradient(135deg,rgba(124,91,245,0.1),rgba(124,91,245,0.2)); color: var(--accent2); border: 1px solid rgba(124,91,245,0.35); box-shadow:0 2px 8px rgba(124,91,245,0.12); }
.badge-gray { background: linear-gradient(135deg,rgba(139,144,160,0.1),rgba(139,144,160,0.2)); color: var(--text2); border: 1px solid rgba(139,144,160,0.25); }

/* ─── INPUTS ─── */
.input-group { margin-bottom: 16px; }
.input-group label { display: block; font-size: 13px; color: var(--text2); margin-bottom: 6px; font-family: var(--font); font-weight: 500; }
.input-field { width: 100%; background: #fff; border: 1.5px solid var(--border2); border-radius: 8px; padding: 11px 14px; color: var(--text); font-family: var(--font2); font-size: 14px; transition: border-color 0.18s; }
.input-field:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(26,115,232,0.12); }
.input-field::placeholder { color: var(--text3); }
select.input-field option { background: #fff; }

/* ─── NAVBAR ─── */
#navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(255,255,255,0.95); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--border2); height: 60px; display: flex; align-items: center; padding: 0 24px; gap: 16px; box-shadow: 0 1px 4px rgba(0,0,0,0.08); transition: border-color 0.3s; }
#navbar.admin-mode { border-bottom: 2px solid rgba(231,76,60,0.4); background: rgba(255,248,248,0.97); }
.nav-brand { font-family: var(--font); font-size: 20px; font-weight: 800; color: var(--text); cursor: pointer; }
.nav-brand span { color: var(--accent); }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-link { padding: 7px 14px; border-radius: 7px; font-size: 13px; font-family: var(--font); font-weight: 500; color: var(--text2); cursor: pointer; transition: all 0.16s; }
.nav-link:hover, .nav-link.active { background: var(--bg4); color: var(--text); }
.nav-user { display: flex; align-items: center; gap: 10px; margin-left: 16px; }
.nav-avatar { width: 34px; height: 34px; border-radius: 50%; background: var(--accent2); display: flex; align-items: center; justify-content: center; font-family: var(--font); font-size: 14px; font-weight: 700; cursor: pointer; border: 2px solid var(--border2); }
.nav-xp { font-size: 12px; font-family: var(--font); color: var(--gold); font-weight: 600; }

/* ─── HERO ─── */
.hero { padding: 120px 24px 80px; text-align: center; max-width: 900px; margin: 0 auto; }
.hero-tag { display: inline-flex; align-items: center; gap: 8px; background: rgba(74,158,255,0.10); border: 1px solid rgba(74,158,255,0.28); border-radius: 20px; padding: 5px 16px; font-size: 13px; font-family: var(--font); color: var(--accent); margin-bottom: 24px; }
.hero h1 { font-size: clamp(32px, 6vw, 60px); font-weight: 800; line-height: 1.15; color: var(--text); margin-bottom: 20px; letter-spacing: -0.5px; }
.hero h1 .highlight { color: var(--accent); }
.hero p { font-size: 17px; color: var(--text2); line-height: 1.7; max-width: 600px; margin: 0 auto 36px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; justify-content: center; margin-top: 60px; flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat .num { font-family: var(--font); font-size: 32px; font-weight: 800; color: var(--text); }
.hero-stat .lbl { font-size: 13px; color: var(--text2); margin-top: 4px; }

/* ─── FEATURES ─── */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; max-width: 1100px; margin: 0 auto; padding: 0 24px 80px; }
.feature-card { background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; padding: 24px; transition: border-color 0.2s; }
.feature-card:hover { border-color: var(--accent); }
.feature-icon { width: 46px; height: 46px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 16px; }
.feature-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 13px; color: var(--text2); line-height: 1.6; }

/* ─── PRICING ─── */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; max-width: 900px; margin: 0 auto; padding: 0 24px 80px; }
.price-card { background: var(--card); border: 1.5px solid var(--border); box-shadow: var(--shadow); border-radius: 14px; padding: 28px; position: relative; transition: border-color 0.2s, transform 0.2s; }
.price-card:hover { transform: translateY(-3px); }
.price-card.featured { border-color: var(--accent); }
.price-card .featured-tag { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--accent); color: #fff; font-size: 11px; font-family: var(--font); font-weight: 700; padding: 3px 14px; border-radius: 20px; white-space: nowrap; }
.price-card .price-name { font-size: 15px; font-weight: 600; color: var(--text2); margin-bottom: 10px; }
.price-card .price-amount { font-family: var(--font); font-size: 38px; font-weight: 800; color: var(--text); }
.price-card .price-amount span { font-size: 16px; color: var(--text2); }
.price-card .price-desc { font-size: 13px; color: var(--text2); margin: 10px 0 20px; }
.price-features { list-style: none; margin-bottom: 24px; }
.price-features li { font-size: 13px; color: var(--text2); padding: 5px 0; display: flex; align-items: center; gap: 8px; }
.price-features li::before { content: '✓'; color: var(--green); font-weight: 700; }

/* ─── SECTION ─── */
.section { padding: 60px 24px; }
.section-header { text-align: center; margin-bottom: 40px; }
.section-header h2 { font-size: 28px; font-weight: 800; margin-bottom: 8px; }
.section-header p { font-size: 15px; color: var(--text2); }

/* ─── DASHBOARD ─── */
.dash-layout { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.sidebar { background: #fff; border-right: 1px solid var(--border); padding: 80px 0 24px; position: fixed; top: 0; left: 0; bottom: 0; width: 220px; overflow-y: auto; }
.sidebar-nav { padding: 0 12px; }
.sidebar-item { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 8px; cursor: pointer; font-size: 14px; font-family: var(--font); font-weight: 500; color: var(--text2); transition: all 0.16s; margin-bottom: 2px; }
.sidebar-item:hover { background: var(--bg3); color: var(--text); }
.sidebar-item.active { background: rgba(79,142,247,0.15); color: var(--accent); }
.sidebar-icon { font-size: 16px; width: 22px; text-align: center; }
.sidebar-divider { height: 1px; background: var(--border); margin: 12px 16px; }
.sidebar-section-label { font-size: 11px; color: var(--text3); padding: 0 14px 6px; font-family: var(--font); font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; margin-top: 4px; }
.dash-content { margin-left: 220px; padding: 80px 28px 40px; }
.dash-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.stat-card { background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow); border-radius: 10px; padding: 18px; }
.stat-card .stat-label { font-size: 12px; color: var(--text2); margin-bottom: 8px; font-family: var(--font); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.stat-card .stat-value { font-family: var(--font); font-size: 28px; font-weight: 800; color: var(--text); }
.stat-card .stat-sub { font-size: 12px; color: var(--text2); margin-top: 4px; }

/* ─── EXAM LIST ─── */
.exam-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.exam-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; cursor: pointer; transition: border-color 0.2s, transform 0.2s; }
.exam-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.exam-card-head { padding: 16px 18px 14px; border-bottom: 1px solid var(--border); }
.exam-card-body { padding: 14px 18px 16px; }
.exam-subject { font-size: 18px; font-weight: 700; font-family: var(--font); margin-bottom: 4px; }
.exam-level { font-size: 12px; color: var(--text2); }
.exam-meta { display: flex; gap: 16px; margin-top: 12px; }
.exam-meta-item { font-size: 12px; color: var(--text2); display: flex; align-items: center; gap: 4px; }
.exam-price { font-family: var(--font); font-size: 20px; font-weight: 800; color: var(--gold); }
.exam-price small { font-size: 13px; font-weight: 400; color: var(--text2); }
.exam-bought { color: var(--green); font-size: 13px; font-family: var(--font); font-weight: 600; }

/* ─── GAME / EXAM INTERFACE ─── */
#exam-interface { position: fixed; inset: 0; background: var(--bg); z-index: 200; display: flex; flex-direction: column; }
.exam-topbar { background: rgba(255,255,255,0.97); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border2); padding: 12px 24px; display: flex; align-items: center; gap: 16px; }
.exam-topbar .exam-title { font-family: var(--font); font-size: 16px; font-weight: 700; flex: 1; }
.timer-wrap { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.timer-box { background: var(--bg3); border: 1px solid var(--border2); border-radius: 8px; padding: 6px 16px; font-family: var(--font); font-size: 20px; font-weight: 800; color: var(--text); min-width: 80px; text-align: center; transition: color 0.3s; }
.timer-box.warning { color: var(--orange); }
.timer-box.danger { color: var(--red); }
.timer-ticks { display: flex; gap: 2px; align-items: flex-end; height: 14px; }
.timer-tick { width: 4px; border-radius: 1px; transition: background 0.4s, height 0.3s; }
.timer-tick.active { background: #2ecc71; }
.timer-tick.warn { background: #f39c12; }
.timer-tick.crit { background: #e74c3c; }
.timer-tick.off { background: #ddd; }
.score-box { background: rgba(245,200,66,0.12); border: 1px solid rgba(245,200,66,0.25); border-radius: 8px; padding: 6px 16px; font-family: var(--font); font-size: 16px; font-weight: 800; color: var(--gold); }
.lives-box { display: flex; gap: 4px; align-items: center; }
.life-icon { font-size: 18px; }
.streak-box { background: rgba(231,76,60,0.12); border: 1px solid rgba(231,76,60,0.25); border-radius: 8px; padding: 6px 12px; font-family: var(--font); font-size: 14px; font-weight: 700; color: var(--red); }
.exam-progress { height: 4px; background: var(--bg4); }
.exam-progress-bar { height: 100%; background: var(--accent); transition: width 0.4s; }
.exam-body { flex: 1; overflow-y: auto; padding: 40px 24px; max-width: 800px; margin: 0 auto; width: 100%; }
.question-num { font-size: 13px; color: var(--text2); font-family: var(--font); font-weight: 600; margin-bottom: 8px; }
.question-text { font-size: 20px; font-weight: 600; font-family: var(--font); line-height: 1.65; margin-bottom: 32px; color: #000000; letter-spacing: 0.01em; text-align: center; }
.options-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.option-btn { background: #fff; border: 1.5px solid var(--border2); box-shadow: var(--shadow); border-radius: 10px; padding: 16px 20px; cursor: pointer; font-family: var(--font2); font-size: 15px; color: var(--text); text-align: left; transition: all 0.18s; display: flex; align-items: flex-start; gap: 12px; line-height: 1.5; }
.option-btn:hover:not(:disabled) { border-color: var(--accent); background: var(--bg4); }
.option-btn.correct { background: rgba(46,204,113,0.15); border-color: var(--green); color: var(--green); }
.option-btn.wrong { background: rgba(231,76,60,0.15); border-color: var(--red); color: var(--red); }
.option-btn:disabled { cursor: not-allowed; }
.option-letter { font-family: var(--font); font-weight: 700; font-size: 14px; color: var(--text2); min-width: 20px; }
.explain-box { background: var(--bg3); border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 8px; padding: 16px; margin-top: 20px; font-size: 14px; color: var(--text2); line-height: 1.7; }
.point-popup { position: fixed; top: 80px; right: 24px; background: var(--bg3); border: 1px solid var(--gold); border-radius: 8px; padding: 8px 16px; font-family: var(--font); font-size: 16px; font-weight: 700; color: var(--gold); animation: popupAnim 1.2s ease forwards; pointer-events: none; z-index: 300; }
@keyframes popupAnim { 0%{opacity:0;transform:translateY(0) scale(0.8)} 20%{opacity:1;transform:translateY(-10px) scale(1)} 80%{opacity:1;transform:translateY(-20px)} 100%{opacity:0;transform:translateY(-40px)} }

/* ─── RESULT SCREEN ─── */
.result-screen { max-width: 600px; margin: 0 auto; padding: 60px 24px; text-align: center; }
.result-rank-badge { width: 100px; height: 100px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: var(--font); font-size: 40px; font-weight: 900; margin: 0 auto 24px; border: 3px solid; }
.result-rank-badge.expert      { background: rgba(245,200,66,0.2);  border-color: var(--gold);    color: var(--gold);    }
.result-rank-badge.advanced    { background: rgba(124,91,245,0.2);  border-color: var(--accent2); color: var(--accent2); }
.result-rank-badge.upper-int   { background: rgba(79,142,247,0.2);  border-color: var(--accent);  color: var(--accent);  }
.result-rank-badge.intermediate{ background: rgba(46,204,113,0.2);  border-color: var(--green);   color: var(--green);   }
.result-rank-badge.pre-int     { background: rgba(26,188,156,0.2);  border-color: var(--teal);    color: var(--teal);    }
.result-rank-badge.basic       { background: rgba(243,156,18,0.2);  border-color: var(--orange);  color: var(--orange);  }
.result-rank-badge.beginner    { background: rgba(231,76,60,0.2);   border-color: var(--red);     color: var(--red);     }
.result-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 28px 0; }
.result-stat { background: var(--bg3); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.result-stat .rs-val { font-family: var(--font); font-size: 24px; font-weight: 800; }
.result-stat .rs-label { font-size: 12px; color: var(--text2); margin-top: 4px; }

/* ─── LEADERBOARD ─── */
.leaderboard-table { width: 100%; border-collapse: collapse; }
.leaderboard-table th { font-family: var(--font); font-size: 12px; font-weight: 600; color: var(--text2); text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); text-transform: uppercase; letter-spacing: 0.5px; }
.leaderboard-table td { padding: 12px 14px; border-bottom: 1px solid var(--border); font-size: 14px; vertical-align: middle; }
.leaderboard-table tr:last-child td { border-bottom: none; }
.leaderboard-table tr:hover td { background: var(--bg3); }
.rank-num { font-family: var(--font); font-size: 16px; font-weight: 800; }
.rank-1 { color: var(--gold); }
.rank-2 { color: var(--silver); }
.rank-3 { color: var(--bronze); }
.player-info { display: flex; align-items: center; gap: 10px; }
.player-avatar { width: 34px; height: 34px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: var(--font); font-size: 13px; font-weight: 700; }
.score-bar { height: 6px; background: var(--bg4); border-radius: 3px; overflow: hidden; margin-top: 4px; }
.score-bar-fill { height: 100%; border-radius: 3px; background: var(--accent); }

/* ─── STATS / CHART ─── */
.chart-area { background: var(--bg3); border: 1px solid var(--border); border-radius: 10px; padding: 20px; margin-bottom: 16px; }
.mini-chart { display: flex; align-items: flex-end; gap: 6px; height: 80px; }
.mini-bar { flex: 1; border-radius: 4px 4px 0 0; background: var(--accent); opacity: 0.7; transition: opacity 0.2s; }
.mini-bar:hover { opacity: 1; }
.progress-ring { position: relative; display: inline-flex; align-items: center; justify-content: center; }
.progress-ring svg { transform: rotate(-90deg); }
.progress-ring-label { position: absolute; font-family: var(--font); font-size: 20px; font-weight: 800; }

/* ─── ADMIN ─── */
.admin-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.admin-table th { background: var(--bg3); padding: 10px 14px; text-align: left; font-family: var(--font); font-size: 12px; font-weight: 600; color: var(--text2); text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid var(--border); }
.admin-table td { padding: 12px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.admin-table tr:hover td { background: var(--bg2); }

/* ─── TABS ─── */
.tabs { display: flex; gap: 4px; background: var(--bg3); border-radius: 10px; padding: 4px; margin-bottom: 24px; }
.tab { padding: 8px 18px; border-radius: 7px; cursor: pointer; font-family: var(--font); font-size: 14px; font-weight: 500; color: var(--text2); transition: all 0.18s; }
.tab:hover { color: var(--text); }
.tab.active { background: var(--bg4); color: var(--text); }

/* ─── MODAL (Game Style) ─── */
@keyframes modalEnter { 0%{opacity:0;transform:scale(0.85) translateY(30px);} 100%{opacity:1;transform:scale(1) translateY(0);} }
@keyframes modalOverlayIn { 0%{opacity:0;backdrop-filter:blur(0);} 100%{opacity:1;backdrop-filter:blur(4px);} }
@keyframes modalGlow { 0%,100%{box-shadow:0 8px 32px rgba(79,142,247,0.15),0 0 0 1px rgba(79,142,247,0.08);} 50%{box-shadow:0 8px 40px rgba(79,142,247,0.25),0 0 0 1px rgba(79,142,247,0.15);} }
.modal-overlay { position: fixed; inset: 0; background: rgba(10,15,30,0.5); backdrop-filter:blur(4px); z-index: 150; display: flex; align-items: center; justify-content: center; padding: 20px; animation:modalOverlayIn 0.3s ease; }
.modal { background: linear-gradient(180deg,#ffffff 0%,#f8faff 100%); border: 1.5px solid rgba(79,142,247,0.15); border-radius: 20px; box-shadow: 0 8px 32px rgba(79,142,247,0.15), 0 2px 8px rgba(0,0,0,0.08); width: 100%; max-width: 480px; max-height: 90vh; overflow-y: auto; animation:modalEnter 0.35s cubic-bezier(.34,1.56,.64,1); }
.modal-head { padding: 20px 24px 16px; border-bottom: 1.5px solid rgba(79,142,247,0.1); display: flex; align-items: center; justify-content: space-between; background: linear-gradient(135deg,rgba(79,142,247,0.06) 0%,rgba(124,77,255,0.04) 100%); border-radius: 20px 20px 0 0; }
.modal-head h3 { font-size: 18px; font-weight: 700; background: linear-gradient(135deg,#1a73e8,#7c4dff); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.modal-close { width: 32px; height: 32px; border-radius: 10px; background: linear-gradient(135deg,#f1f3f4,#e8eaed); border: 1.5px solid rgba(0,0,0,0.06); cursor: pointer; color: var(--text2); font-size: 16px; display: flex; align-items: center; justify-content: center; transition:all 0.2s; }
.modal-close:hover { background: linear-gradient(135deg,#ff6b6b,#d93025); color:#fff; transform:rotate(90deg) scale(1.1); border-color:transparent; box-shadow:0 3px 10px rgba(217,48,37,0.3); }
.modal-body { padding: 24px; }

/* ─── XP BAR ─── */
.xp-bar-wrap { background: var(--bg4); border-radius: 4px; height: 8px; overflow: hidden; }
.xp-bar-fill { height: 100%; border-radius: 4px; background: linear-gradient(90deg, var(--accent2), var(--accent)); transition: width 0.5s; }

/* ─── TOAST (Game Style) ─── */
@keyframes toastSlideUp { 0%{opacity:0;transform:translateX(-50%) translateY(30px) scale(0.9);} 100%{opacity:1;transform:translateX(-50%) translateY(0) scale(1);} }
@keyframes toastSlideOut { 0%{opacity:1;transform:translateX(-50%) translateY(0) scale(1);} 100%{opacity:0;transform:translateX(-50%) translateY(20px) scale(0.9);} }
@keyframes toastIconPop { 0%{transform:scale(0) rotate(-20deg);} 60%{transform:scale(1.3) rotate(5deg);} 100%{transform:scale(1) rotate(0);} }
@keyframes toastProgressBar { 0%{width:100%;} 100%{width:0%;} }
#toast { position: fixed; bottom: 32px; left: 50%; transform: translateX(-50%); background: linear-gradient(135deg,#ffffff,#f8faff); border: 2px solid rgba(79,142,247,0.2); border-radius: 16px; padding: 14px 24px 14px 20px; font-size: 14px; font-weight: 600; font-family: var(--font); z-index: 500; opacity: 0; pointer-events: none; max-width: 400px; text-align: center; box-shadow: 0 8px 32px rgba(0,0,0,0.12), 0 0 0 1px rgba(255,255,255,0.8) inset; color: var(--text); overflow:hidden; }
#toast::before { content:''; position:absolute; bottom:0; left:0; height:3px; border-radius:0 0 14px 14px; background:currentColor; opacity:0.4; }
#toast.show { opacity: 1; pointer-events:auto; animation: toastSlideUp 0.4s cubic-bezier(.34,1.56,.64,1); }
#toast.show::before { animation: toastProgressBar 3s linear forwards; }
#toast.hiding { animation: toastSlideOut 0.3s ease forwards; }
#toast.success { border-color: #1e8e3e; color: #1e8e3e; background: linear-gradient(135deg,#f0faf3,#e8f5e9); box-shadow: 0 8px 32px rgba(30,142,62,0.15), 0 0 20px rgba(30,142,62,0.08); }
#toast.error { border-color: #d93025; color: #d93025; background: linear-gradient(135deg,#fff5f5,#ffebee); box-shadow: 0 8px 32px rgba(217,48,37,0.15), 0 0 20px rgba(217,48,37,0.08); }
#toast.info { border-color: #1a73e8; color: #1a73e8; background: linear-gradient(135deg,#f0f7ff,#e3f2fd); box-shadow: 0 8px 32px rgba(26,115,232,0.15), 0 0 20px rgba(26,115,232,0.08); }

/* ─── FOOTER ─── */
.footer { background: var(--bg2); border-top: 1px solid var(--border2); padding: 32px 24px; text-align: center; font-size: 13px; color: var(--text2); }

/* ─── Dashboard Quick Menu ─── */
.dash-qm-item { flex:0 0 auto; width:72px; cursor:pointer; text-align:center; padding:10px 4px 8px; background:#fff; border:1px solid var(--border); border-radius:12px; transition:all .2s; }
.dash-qm-item:hover { box-shadow:var(--shadow-hover); transform:translateY(-2px); }
.dash-qm-item:active { transform:scale(0.96); }
.dash-qm-icon { width:36px; height:36px; border-radius:10px; display:flex; align-items:center; justify-content:center; margin:0 auto 5px; font-size:20px; }
.dash-qm-item span { font-size:10px; font-weight:600; color:var(--text2); line-height:1.2; display:block; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
#dash-quick-menu::-webkit-scrollbar { height:4px; }
#dash-quick-menu::-webkit-scrollbar-thumb { background:var(--border2); border-radius:4px; }

/* ─── DASHBOARD FEATURE CARDS (Credits / Level / Stats) ─── */
.dash-feature-row { display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin-bottom:18px; }
.dash-feat-card { position:relative; border-radius:16px; padding:18px 18px 16px; color:#fff; overflow:hidden; cursor:pointer; transition:transform .25s cubic-bezier(.2,.8,.3,1), box-shadow .25s; box-shadow:0 6px 18px rgba(0,0,0,.08); isolation:isolate; min-height:170px; display:flex; flex-direction:column; }
.dash-feat-card:hover { transform:translateY(-4px); box-shadow:0 14px 30px rgba(0,0,0,.18); }
.dash-feat-card:active { transform:translateY(-1px) scale(.99); }
.dash-feat-credit { background:linear-gradient(135deg,#f5a623 0%,#f78e17 55%,#e0591a 100%); }
.dash-feat-level  { background:linear-gradient(135deg,#7c4dff 0%,#5b7fff 55%,#1a73e8 100%); }
.dash-feat-stats  { background:linear-gradient(135deg,#2ecc71 0%,#1abc9c 55%,#0ea5e9 100%); }
.dash-feat-glow { position:absolute; top:-40px; right:-40px; width:150px; height:150px; background:radial-gradient(circle,rgba(255,255,255,.35) 0%,rgba(255,255,255,0) 70%); z-index:0; pointer-events:none; }
.dash-feat-card::before { content:""; position:absolute; inset:0; background:radial-gradient(circle at 20% 110%,rgba(255,255,255,.18) 0%,rgba(255,255,255,0) 50%); z-index:0; pointer-events:none; }
.dash-feat-head { display:flex; align-items:center; gap:10px; position:relative; z-index:1; }
.dash-feat-icon { width:38px; height:38px; border-radius:11px; background:rgba(255,255,255,.22); backdrop-filter:blur(6px); display:flex; align-items:center; justify-content:center; font-size:20px; border:1px solid rgba(255,255,255,.25); }
.dash-feat-label { font-size:12px; font-weight:600; opacity:.92; letter-spacing:.3px; text-transform:uppercase; }
.dash-feat-value { font-size:34px; font-weight:900; line-height:1.1; margin-top:10px; position:relative; z-index:1; text-shadow:0 2px 8px rgba(0,0,0,.12); font-feature-settings:"tnum"; letter-spacing:-0.5px; }
.dash-feat-sub { font-size:12px; opacity:.9; margin-top:2px; position:relative; z-index:1; font-weight:500; }
.dash-feat-actions { display:flex; gap:8px; margin-top:auto; padding-top:12px; position:relative; z-index:1; flex-wrap:wrap; }
.dash-feat-btn { border:none; padding:7px 12px; font-size:12px; font-weight:700; border-radius:8px; cursor:pointer; display:inline-flex; align-items:center; gap:5px; transition:transform .15s, background .2s; font-family:inherit; }
.dash-feat-btn-primary { background:rgba(255,255,255,.96); color:#222; box-shadow:0 2px 6px rgba(0,0,0,.12); }
.dash-feat-btn-primary:hover { background:#fff; transform:translateY(-1px); }
.dash-feat-btn-ghost { background:rgba(255,255,255,.2); color:#fff; border:1px solid rgba(255,255,255,.35); }
.dash-feat-btn-ghost:hover { background:rgba(255,255,255,.32); }
.dash-feat-progress-wrap { margin-top:auto; padding-top:10px; position:relative; z-index:1; }
.dash-feat-progress { width:100%; height:7px; background:rgba(255,255,255,.22); border-radius:6px; overflow:hidden; }
.dash-feat-progress-fill { height:100%; background:#fff; border-radius:6px; transition:width .6s cubic-bezier(.2,.8,.3,1); box-shadow:0 0 10px rgba(255,255,255,.5); }
.dash-feat-progress-label { font-size:11px; opacity:.88; margin-top:4px; font-weight:500; }
@media (max-width:720px) {
  .dash-feature-row { grid-template-columns:1fr; gap:10px; }
  .dash-feat-card { min-height:auto; padding:14px; }
  .dash-feat-value { font-size:28px; }
}

/* ─── STATS HISTORY MODAL ─── */
.sh-summary-row { display:grid; grid-template-columns:repeat(4,1fr); gap:10px; margin-bottom:16px; }
.sh-sum-card { padding:14px 10px; border-radius:12px; text-align:center; border:1px solid var(--border); background:#fff; position:relative; overflow:hidden; }
.sh-sum-card::before { content:""; position:absolute; left:0; top:0; bottom:0; width:4px; }
.sh-sum-blue::before   { background:#1a73e8; } .sh-sum-blue   .sh-sum-val { color:#1a73e8; }
.sh-sum-green::before  { background:#2ecc71; } .sh-sum-green  .sh-sum-val { color:#1e8e3e; }
.sh-sum-gold::before   { background:#f5a623; } .sh-sum-gold   .sh-sum-val { color:#e37400; }
.sh-sum-purple::before { background:#7c4dff; } .sh-sum-purple .sh-sum-val { color:#7c4dff; }
.sh-sum-icon { font-size:20px; margin-bottom:4px; }
.sh-sum-val { font-size:22px; font-weight:900; line-height:1; font-feature-settings:"tnum"; }
.sh-sum-label { font-size:11px; color:var(--text3); margin-top:4px; font-weight:600; }

.sh-chart-wrap { background:#fff; border:1px solid var(--border); border-radius:12px; padding:14px; margin-bottom:14px; }
.sh-chart-head { display:flex; align-items:center; justify-content:space-between; margin-bottom:10px; }
.sh-trend-badge { font-size:12px; font-weight:700; padding:4px 10px; border-radius:12px; background:#f0f0f0; color:var(--text2); }
.sh-trend-up   { background:#e8f5e9 !important; color:#1e8e3e !important; }
.sh-trend-down { background:#fce4ec !important; color:#d93025 !important; }
.sh-trend-flat { background:#fff7e6 !important; color:#e37400 !important; }
.sh-chart { display:flex; align-items:flex-end; gap:4px; height:120px; padding:4px 0; border-bottom:2px solid var(--border); position:relative; }
.sh-bar { flex:1; min-width:8px; border-radius:4px 4px 0 0; position:relative; transition:height .5s cubic-bezier(.2,.8,.3,1); cursor:pointer; }
.sh-bar:hover { opacity:.85; }
.sh-bar-tip { position:absolute; bottom:calc(100% + 4px); left:50%; transform:translateX(-50%); background:#222; color:#fff; padding:4px 8px; border-radius:6px; font-size:11px; white-space:nowrap; opacity:0; pointer-events:none; transition:opacity .2s; font-weight:600; z-index:5; }
.sh-bar:hover .sh-bar-tip { opacity:1; }

.sh-controls { display:flex; gap:8px; margin-bottom:10px; flex-wrap:wrap; }
.sh-search { flex:1; min-width:180px; font-size:13px; }
.sh-select { width:170px; font-size:12px; }

.sh-table-wrap { background:#fff; border:1px solid var(--border); border-radius:12px; overflow:hidden; max-height:360px; overflow-y:auto; }
.sh-table { width:100%; border-collapse:collapse; font-size:13px; }
.sh-table thead th { position:sticky; top:0; background:linear-gradient(180deg,#f6f8fa,#eef1f5); z-index:2; padding:10px 12px; text-align:left; font-weight:700; color:var(--text2); border-bottom:2px solid var(--border); font-size:12px; letter-spacing:.3px; white-space:nowrap; }
.sh-table tbody td { padding:10px 12px; border-bottom:1px solid var(--border); vertical-align:middle; }
.sh-table tbody tr:hover { background:#f8fafc; }
.sh-table tbody tr:last-child td { border-bottom:none; }
.sh-pct-pill { display:inline-flex; align-items:center; gap:4px; padding:3px 10px; border-radius:11px; font-weight:800; font-size:12px; font-feature-settings:"tnum"; }
.sh-pct-excellent { background:#e8f5e9; color:#1e8e3e; }
.sh-pct-good      { background:#e3f2fd; color:#1a73e8; }
.sh-pct-avg       { background:#fff7e6; color:#e37400; }
.sh-pct-poor      { background:#fce4ec; color:#d93025; }
.sh-mode-pill { display:inline-block; padding:2px 8px; border-radius:8px; font-size:11px; font-weight:700; background:#f0f2f5; color:var(--text2); }
.sh-mode-sim { background:#fff3e0; color:#e37400; }
.sh-empty { padding:40px 20px; text-align:center; color:var(--text3); font-size:13px; }
@media (max-width:720px) {
  .sh-summary-row { grid-template-columns:repeat(2,1fr); }
  .sh-table { font-size:11px; }
  .sh-table thead th, .sh-table tbody td { padding:7px 6px; }
  .sh-select { width:100%; }
}

/* ─── RESPONSIVE ─── */
/* ─── MOBILE NAV ─── */
.mob-nav { display:none; position:fixed; bottom:0; left:0; right:0; z-index:101; background:var(--bg2); border-top:1px solid var(--border); padding:6px 0 env(safe-area-inset-bottom,6px); }
.mob-nav-items { display:flex; justify-content:space-around; }
.mob-nav-btn { display:flex; flex-direction:column; align-items:center; gap:2px; padding:6px 10px; border-radius:8px; cursor:pointer; border:none; background:transparent; color:var(--text2); font-family:var(--font); font-size:10px; font-weight:600; transition:color 0.2s; min-width:52px; }
.mob-nav-btn.active,.mob-nav-btn:active { color:var(--accent); }
.mob-nav-icon { font-size:20px; line-height:1; }
.ham-btn { display:none; background:transparent; border:none; cursor:pointer; color:var(--text); padding:6px; border-radius:6px; }
.ham-btn:hover { background:var(--bg3); }
/* hamburger lines */
.ham-line { display:block; width:22px; height:2px; background:currentColor; border-radius:2px; margin:4px 0; transition:all 0.3s; }

/* ─── HAMBURGER DRAWER ─── */
.mob-drawer { position:fixed; top:0; left:0; bottom:0; width:260px; background:var(--bg2); border-right:1px solid var(--border); z-index:200; transform:translateX(-100%); transition:transform 0.28s cubic-bezier(.4,0,.2,1); overflow-y:auto; padding:70px 12px 24px; }
.mob-drawer.open { transform:translateX(0); }
.mob-overlay { position:fixed; inset:0; background:rgba(0,0,0,0.5); z-index:199; display:none; }
.mob-overlay.show { display:block; }

/* ─── TIMER WIDGET (floating) ─── */
.timer-widget { position:fixed; top:70px; right:16px; z-index:90; background:var(--bg2); border:1px solid var(--border2); border-radius:14px; padding:10px 14px; min-width:130px; box-shadow:0 4px 24px rgba(0,0,0,0.3); }
.timer-widget-title { font-size:10px; color:var(--text2); font-family:var(--font); font-weight:600; text-transform:uppercase; letter-spacing:0.5px; margin-bottom:4px; }
.timer-widget-display { font-family:var(--font); font-size:26px; font-weight:900; color:var(--text); letter-spacing:2px; text-align:center; }
.timer-widget-display.warn { color:var(--orange); }
.timer-widget-display.danger { color:var(--red); animation:timerPulse 0.6s infinite; }
@keyframes timerPulse { 0%,100%{opacity:1} 50%{opacity:0.5} }
.timer-widget-controls { display:flex; gap:6px; margin-top:8px; }
.tw-btn { flex:1; padding:5px 0; border-radius:6px; border:1px solid var(--border2); background:transparent; color:var(--text2); font-size:11px; font-family:var(--font); font-weight:600; cursor:pointer; transition:all 0.15s; }
.tw-btn:hover { border-color:var(--accent); color:var(--accent); }
.tw-btn.active { background:var(--accent); border-color:var(--accent); color:#fff; }
.timer-widget-set { display:flex; gap:4px; margin-top:6px; flex-wrap:wrap; }
.tw-preset { padding:3px 8px; border-radius:4px; border:1px solid var(--border); background:var(--bg3); color:var(--text2); font-size:10px; font-family:var(--font); cursor:pointer; transition:all 0.15s; }
.tw-preset:hover { border-color:var(--accent); color:var(--accent); }
.tw-toggle-btn { position:fixed; top:70px; right:16px; z-index:91; background:var(--bg3); border:1.5px solid var(--border2); border-radius:50%; width:40px; height:40px; display:flex; align-items:center; justify-content:center; cursor:pointer; font-size:18px; box-shadow:0 2px 12px rgba(0,0,0,0.3); transition:border-color 0.2s; }
.tw-toggle-btn:hover { border-color:var(--accent); }
.timer-widget.hidden-widget { display:none; }

/* ─── RESPONSIVE BREAKPOINTS ─── */
/* Tablet */
@media(max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid  { grid-template-columns: repeat(2, 1fr); }
  .hero h1       { font-size: clamp(26px,5vw,48px); }
  .dash-grid     { grid-template-columns: repeat(2, 1fr); }
  .result-stats  { grid-template-columns: repeat(3,1fr); }
}
/* Mobile */
@media(max-width: 768px) {
  #navbar { padding:0 14px; height:54px; }
  .nav-brand { font-size:17px; }
  .nav-links { display:none !important; }
  .ham-btn   { display:flex; flex-direction:column; margin-left:auto; }
  .nav-user  { gap:6px; }
  .nav-xp    { display:none; }
  .nav-avatar { width:30px; height:30px; font-size:12px; }

  .mob-nav { display:block; }
  body { padding-bottom:68px; }

  .sidebar    { display:none; }
  .dash-layout{ grid-template-columns:1fr; }
  .dash-content { margin-left:0; padding:70px 14px 20px; }
  .dash-grid  { grid-template-columns:repeat(2,1fr); gap:10px; }
  #dash-stats-grid { grid-template-columns:repeat(2,1fr) !important; gap:8px !important; }
  #dash-stats-grid .stat-card { padding:12px 6px !important; }
  #dash-stats-grid .stat-card div[style*="font-size:22px"] { font-size:18px !important; }

  .hero       { padding:80px 16px 50px; }
  .hero h1    { font-size:clamp(22px,6vw,34px); }
  .hero p     { font-size:15px; }
  .hero-stats { gap:18px; flex-wrap:wrap; }
  .hero-stat .num { font-size:22px; }
  .hero-cta   { flex-direction:column; align-items:center; }
  .hero-cta .btn { width:100%; max-width:280px; }

  .features-grid { grid-template-columns:1fr; padding:0 16px 50px; }
  .pricing-grid  { grid-template-columns:1fr; padding:0 16px 60px; }
  .price-card.featured { margin-top:8px; }

  .section    { padding:40px 16px; }
  .section-header h2 { font-size:22px; }

  .exam-grid  { grid-template-columns:1fr; }

  .options-grid { grid-template-columns:1fr; }
  .sim-opts     { grid-template-columns:1fr; }

  .exam-topbar { padding:8px 12px; gap:8px; flex-wrap:wrap; }
  .exam-topbar .exam-title { font-size:13px; }
  .timer-box  { font-size:16px; padding:5px 10px; }

  .result-stats { grid-template-columns:repeat(3,1fr); gap:8px; }
  .result-stat .rs-val { font-size:18px; }

  .admin-table { font-size:12px; }
  .admin-table th,
  .admin-table td { padding:8px 8px; }
  .tabs .tab { padding:7px 12px; font-size:12px; }

  .modal { margin:8px; }
  .modal-body { padding:16px; }

  .leaderboard-table th,
  .leaderboard-table td { padding:8px 8px; font-size:12px; }

  .chart-area { padding:14px; }
  .tw-toggle-btn { top:62px; right:10px; width:36px; height:36px; font-size:16px; }
  .timer-widget  { top:108px; right:10px; min-width:120px; }

  .qr-box canvas, .qr-box img { width:150px !important; height:150px !important; }
}
/* Small phones */
@media(max-width:400px){
  .hero h1 { font-size:20px; }
  .dash-grid { grid-template-columns:1fr; }
  .result-stats { grid-template-columns:1fr 1fr; }
}

/* ─── QR PAYMENT ─── */
.qr-steps { display:flex; gap:0; margin-bottom:20px; }
.qr-step { flex:1; text-align:center; padding:8px 4px; font-size:12px; font-family:var(--font); font-weight:600; color:var(--text3); border-bottom:2px solid var(--border); transition:all 0.2s; }
.qr-step.active { color:var(--accent); border-bottom-color:var(--accent); }
.qr-step.done { color:var(--green); border-bottom-color:var(--green); }
.qr-box { background:white; border-radius:12px; padding:16px; display:inline-block; margin:0 auto; }
.qr-countdown { font-family:var(--font); font-size:28px; font-weight:900; color:var(--orange); }
.slip-upload-area { border:2px dashed var(--border2); border-radius:10px; padding:28px; text-align:center; cursor:pointer; transition:border-color 0.2s; }
.slip-upload-area:hover { border-color:var(--accent); }
.slip-preview { max-width:100%; border-radius:8px; margin-top:10px; max-height:200px; object-fit:contain; }
.payment-ref { font-family:var(--font); font-size:18px; font-weight:800; color:var(--gold); letter-spacing:2px; background:var(--bg3); padding:8px 16px; border-radius:8px; display:inline-block; }

/* ─── SIMULATION MODE — Mobile-First Redesign ─── */
#sim-interface {
  position: fixed; inset: 0; background: var(--bg); z-index: 200;
  display: flex; flex-direction: column;
  /* account for iOS safe area */
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

/* ── Header ── */
.sim-header {
  background: var(--bg2); border-bottom: 1px solid var(--border);
  padding: 0 16px; height: 52px;
  display: flex; align-items: center; gap: 10px; flex-shrink: 0;
  position: relative; z-index: 2;
}
.sim-title { font-family: var(--font); font-size: 14px; font-weight: 700; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sim-total-timer {
  background: var(--bg3); border: 1.5px solid var(--border2); border-radius: 8px;
  padding: 5px 12px; font-family: var(--font); font-size: 18px; font-weight: 900;
  letter-spacing: 1px; min-width: 78px; text-align: center; transition: color 0.3s; flex-shrink: 0;
}
.sim-total-timer.warn { color: var(--orange); border-color: var(--orange); }
.sim-total-timer.danger { color: var(--red); border-color: var(--red); animation: pulse 0.8s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.6} }
@keyframes spin { 0%{transform:rotate(0deg)} 100%{transform:rotate(360deg)} }

/* ── Mobile Nav Strip (replaces left panel on mobile) ── */
.sim-mob-nav {
  display: none;
  background: var(--bg2); border-bottom: 1px solid var(--border);
  padding: 8px 12px; flex-shrink: 0;
}
.sim-mob-nav-strip {
  display: flex; gap: 5px; overflow-x: auto; -webkit-overflow-scrolling: touch;
  scrollbar-width: none; padding-bottom: 2px;
}
.sim-mob-nav-strip::-webkit-scrollbar { display: none; }
.sim-mob-stat {
  display: flex; gap: 10px; font-size: 11px; font-family: var(--font);
  color: var(--text2); align-items: center; margin-top: 6px; flex-wrap: wrap;
}
.sim-mob-legend { display: flex; align-items: center; gap: 4px; }
.sim-mob-dot-indicator { width: 10px; height: 10px; border-radius: 3px; flex-shrink: 0; }

/* ── Body ── */
.sim-body { flex: 1; display: flex; overflow: hidden; min-height: 0; }

/* ── Desktop Nav Panel ── */
.sim-nav-panel {
  width: 200px; background: var(--bg2); border-right: 1px solid var(--border);
  overflow-y: auto; padding: 16px; flex-shrink: 0;
}
.sim-nav-title { font-size: 12px; font-family: var(--font); font-weight: 700; color: var(--text2); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 10px; }
.sim-q-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 4px; }
.sim-q-dot {
  width: 32px; height: 32px; border-radius: 6px; display: flex; align-items: center; justify-content: center;
  font-family: var(--font); font-size: 12px; font-weight: 700; cursor: pointer;
  border: 1.5px solid var(--border2); color: var(--text2); background: var(--bg3); transition: all 0.15s;
}
.sim-q-dot:hover { border-color: var(--accent); color: var(--accent); }
.sim-q-dot.current { border-color: var(--accent); background: rgba(79,142,247,0.15); color: var(--accent); }
.sim-q-dot.answered { background: rgba(46,204,113,0.15); border-color: var(--green); color: var(--green); }
.sim-q-dot.flagged { background: rgba(245,200,66,0.15); border-color: var(--gold); color: var(--gold); }
.sim-q-dot.answered.flagged { background: rgba(245,200,66,0.15); border-color: var(--gold); color: var(--gold); }

/* ── Question Content ── */
.sim-content { flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; padding: 28px 36px; max-width: 760px; }
.sim-q-header { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.sim-q-num { font-size: 13px; font-family: var(--font); font-weight: 600; color: var(--text2); }
.sim-flag-btn { padding: 5px 12px; border-radius: 6px; font-size: 12px; font-family: var(--font); font-weight: 600; cursor: pointer; border: 1.5px solid var(--border2); background: transparent; color: var(--text2); transition: all 0.15s; }
.sim-flag-btn.flagged { border-color: var(--gold); color: var(--gold); background: rgba(245,200,66,0.1); }
.sim-question { font-size: 18px; font-weight: 600; font-family: var(--font); line-height: 1.65; margin-bottom: 24px; color: var(--text); letter-spacing: 0.01em; }
.sim-opts { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.sim-opt {
  background: var(--bg3); border: 1.5px solid var(--border2); border-radius: 10px;
  padding: 14px 16px; cursor: pointer; font-family: var(--font2); font-size: 15px;
  color: var(--text); text-align: left; transition: all 0.15s;
  display: flex; align-items: flex-start; gap: 10px; line-height: 1.5;
}
.sim-opt:hover:not(:disabled) { border-color: var(--accent); background: var(--bg4); }
.sim-opt.selected { border-color: var(--accent); background: rgba(79,142,247,0.15); color: var(--accent); }
.sim-opt-letter { font-family: var(--font); font-weight: 700; font-size: 13px; color: var(--text2); min-width: 18px; flex-shrink: 0; }
.sim-opt.selected .sim-opt-letter { color: var(--accent); }

/* ── Footer ── */
.sim-footer {
  background: var(--bg2); border-top: 1px solid var(--border);
  padding: 10px 16px; display: flex; align-items: center; gap: 10px; flex-shrink: 0;
}
.sim-progress-info { font-size: 12px; color: var(--text2); margin-right: auto; font-family: var(--font); }
.sim-progress-bar-wrap { width: 120px; height: 5px; background: var(--bg4); border-radius: 3px; overflow: hidden; }
.sim-progress-bar { height: 100%; border-radius: 3px; background: var(--accent); transition: width 0.3s; }

/* Preview protection */
.preview-protected { position: relative; overflow: hidden; -webkit-user-select: none; user-select: none; }
.preview-protected img { pointer-events: none; -webkit-user-drag: none; user-drag: none; }
.preview-mask { position: absolute; bottom: 0; left: 0; right: 0; height: 70%; background: linear-gradient(to bottom,transparent 0%,rgba(var(--bg-rgb,15,17,23),0.6) 30%,rgba(var(--bg-rgb,15,17,23),0.95) 60%,rgb(var(--bg-rgb,15,17,23)) 100%); display: flex; flex-direction: column; align-items: center; justify-content: flex-end; padding: 20px; pointer-events: all; }
.preview-mask .lock-msg { text-align: center; color: var(--text2); font-size: 13px; margin-bottom: 10px; }
.preview-mask .lock-icon { font-size: 32px; margin-bottom: 8px; opacity: 0.7; }

/* ─── SIMULATION MOBILE BREAKPOINT ─── */
@media(max-width: 640px) {
  /* Header: compact */
  .sim-header { height: 48px; padding: 0 12px; gap: 8px; }
  .sim-title { font-size: 13px; }
  .sim-total-timer { font-size: 16px; padding: 4px 10px; min-width: 68px; }
  /* Hide desktop submit in header on mobile (use footer button) */
  .sim-header .sim-submit-desktop { display: none; }
  /* Hide answered count in header (shown in nav strip) */
  #sim-answered-count { display: none; }
  /* Hide progress bar from header */
  .sim-header .sim-progress-bar-wrap { display: none; }

  /* Show mobile nav strip */
  .sim-mob-nav { display: block; }

  /* Hide desktop left nav panel */
  .sim-nav-panel { display: none; }

  /* Body: full width */
  .sim-body { flex-direction: column; overflow: visible; }

  /* Content: full width, comfortable padding */
  .sim-content {
    padding: 16px 14px 8px;
    max-width: 100%;
    overflow-y: visible;
    flex: 1;
  }

  /* Question text: readable size */
  .sim-question { font-size: 16px; margin-bottom: 16px; line-height: 1.7; text-align: left; }

  /* Options: 1 column, tall touch targets */
  .sim-opts { grid-template-columns: 1fr; gap: 8px; }
  .sim-opt { padding: 13px 14px; font-size: 14px; border-radius: 10px; }

  /* Nav buttons: full width split */
  .sim-nav-btns { display: flex; gap: 10px; margin-top: 16px; }
  .sim-nav-btns .btn { flex: 1; padding: 12px; font-size: 14px; }

  /* Footer: compact */
  .sim-footer { padding: 8px 12px; gap: 8px; }
  .sim-progress-info { font-size: 11px; }
  .sim-footer .btn-gold { font-size: 13px; padding: 9px 14px; }
}

/* ─── SIMULATION REPORT ─── */
.sim-report { max-width: 700px; margin: 0 auto; padding: 60px 24px 40px; }
.report-grade-circle { width: 160px; height: 160px; border-radius: 50%; border: 4px solid; display: flex; flex-direction: column; align-items: center; justify-content: center; margin: 0 auto 24px; padding: 12px; text-align: center; }

/* ─── REVIEW ─── */
.review-item { background: var(--bg3); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin-bottom: 10px; }
.review-item.correct { border-left: 3px solid var(--green); }
.review-item.wrong { border-left: 3px solid var(--red); }
.review-item.unanswered { border-left: 3px solid var(--text3); }
.review-opts { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 10px; }
.review-opt { padding: 8px 12px; border-radius: 6px; font-size: 13px; font-family: var(--font2); border: 1px solid var(--border2); }
.review-opt.correct-ans { background: rgba(46,204,113,0.15); border-color: var(--green); color: var(--green); }
.review-opt.user-wrong { background: rgba(231,76,60,0.15); border-color: var(--red); color: var(--red); }

@media(max-width: 640px) {
  .sim-report { padding: 28px 14px 24px; }
  .report-grade-circle { width: 110px; height: 110px; }
  .review-opts { grid-template-columns: 1fr; }
}


/* ─── CATEGORY DASHBOARD ─── */
.cat-hero { position:relative; overflow:hidden; padding:100px 24px 60px; text-align:center; }
.cat-hero::before { content:''; position:absolute; inset:0; background: radial-gradient(ellipse 80% 60% at 50% -5%, rgba(74,158,255,0.10) 0%, transparent 60%); pointer-events:none; }
.cat-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:20px; max-width:1200px; margin:0 auto; padding:0 24px 60px; }
.cat-card { background:var(--card); border:1px solid var(--border); border-radius:16px; overflow:hidden; cursor:pointer; transition:transform 0.22s, border-color 0.22s, box-shadow 0.22s; position:relative; }
.cat-card:hover { transform:translateY(-4px); border-color:var(--accent); box-shadow: var(--shadow-hover); }
.cat-card-banner { height:8px; width:100%; }
.cat-card-body { padding:20px; }
.cat-card-icon { font-size:36px; margin-bottom:12px; }
.cat-card-name { font-family:var(--font); font-size:18px; font-weight:800; margin-bottom:4px; }
.cat-card-desc { font-size:13px; color:var(--text2); line-height:1.6; margin-bottom:16px; }
.cat-card-stats { display:grid; grid-template-columns:repeat(3,1fr); gap:8px; }
.cat-stat { background:var(--bg3); border-radius:8px; padding:10px 8px; text-align:center; border:1px solid var(--border); }
.cat-stat-val { font-family:var(--font); font-size:18px; font-weight:800; }
.cat-stat-lbl { font-size:10px; color:var(--text2); margin-top:2px; text-transform:uppercase; letter-spacing:0.4px; }
.cat-card-footer { display:flex; align-items:center; justify-content:space-between; padding:12px 20px; border-top:1px solid var(--border); background:rgba(255,255,255,0.02); }
.cat-participants { font-size:12px; color:var(--text2); }
.cat-rank-preview { display:flex; gap:-6px; }
.cat-avatar-mini { width:26px; height:26px; border-radius:50%; border:2px solid var(--card); display:flex; align-items:center; justify-content:center; font-size:10px; font-family:var(--font); font-weight:700; margin-left:-6px; }

/* ─── CATEGORY DETAIL PAGE ─── */
.catd-hero { padding:80px 24px 0; max-width:1200px; margin:0 auto; }
.catd-back { display:inline-flex; align-items:center; gap:8px; font-size:13px; color:var(--text2); cursor:pointer; margin-bottom:20px; transition:color 0.15s; font-family:var(--font); }
.catd-back:hover { color:var(--accent); }
.catd-title-row { display:flex; align-items:flex-start; justify-content:space-between; flex-wrap:wrap; gap:16px; margin-bottom:28px; }
.catd-icon-wrap { width:64px; height:64px; border-radius:14px; display:flex; align-items:center; justify-content:center; font-size:30px; margin-bottom:12px; }
.catd-main { display:grid; grid-template-columns:1fr 340px; gap:20px; max-width:1200px; margin:0 auto; padding:0 24px 60px; }
.catd-left { display:flex; flex-direction:column; gap:16px; }
.catd-right { display:flex; flex-direction:column; gap:16px; }

/* Score distribution bar chart */
.score-dist { display:flex; align-items:flex-end; gap:4px; height:90px; padding:0 4px; }
.score-bar-col { display:flex; flex-direction:column; align-items:center; gap:3px; flex:1; }
.score-bar-fill { width:100%; border-radius:3px 3px 0 0; background:var(--accent); opacity:0.75; min-height:4px; transition:height 0.4s; }
.score-bar-label { font-size:9px; color:var(--text3); }

/* Activity feed */
.activity-item { display:flex; align-items:center; gap:12px; padding:10px 0; border-bottom:1px solid var(--border); }
.activity-item:last-child { border-bottom:none; }
.activity-avatar { width:36px; height:36px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:13px; font-weight:700; font-family:var(--font); flex-shrink:0; }
.activity-info { flex:1; }
.activity-name { font-size:13px; font-weight:600; }
.activity-sub { font-size:11px; color:var(--text2); margin-top:1px; }
.activity-score { font-family:var(--font); font-size:15px; font-weight:800; color:var(--accent); }
.activity-time { font-size:10px; color:var(--text3); }

/* Leaderboard top 100 */
.lb100-row { display:grid; grid-template-columns:44px 1fr 90px 60px 80px; align-items:center; gap:8px; padding:10px 14px; border-bottom:1px solid rgba(148,180,230,0.07); transition:background 0.15s; }
.lb100-row:hover { background:var(--bg3); }
.lb100-rank { font-family:var(--font); font-size:15px; font-weight:800; text-align:center; }
.lb100-player { display:flex; align-items:center; gap:10px; }
.lb100-name { font-size:14px; font-weight:600; }
.lb100-level { font-size:11px; color:var(--text2); }
.lb100-score { font-family:var(--font); font-size:16px; font-weight:800; color:var(--accent); text-align:right; }
.lb100-pct { font-size:12px; color:var(--text2); text-align:center; }
.lb100-bar-wrap { height:5px; background:var(--bg4); border-radius:3px; overflow:hidden; }
.lb100-bar { height:100%; border-radius:3px; background:var(--accent); }
.lb100-medal { font-size:18px; }

/* Trend sparkline */
.sparkline { display:flex; align-items:flex-end; gap:2px; height:40px; }
.spark-bar { flex:1; border-radius:2px 2px 0 0; min-height:3px; }

/* Progress ring SVG */
.prog-ring-wrap { display:flex; flex-direction:column; align-items:center; gap:8px; }

/* Responsive */
@media(max-width:900px) {
  .catd-main { grid-template-columns:1fr; }
}
@media(max-width:600px) {
  .cat-grid { grid-template-columns:1fr; }
  .lb100-row { grid-template-columns:36px 1fr 70px; }
  .lb100-pct, .lb100-bar-wrap { display:none; }
}


/* ─── CREDIT SYSTEM ─── */
.credit-badge { display:inline-flex; align-items:center; gap:5px; background:rgba(232,184,75,0.15); border:1px solid rgba(232,184,75,0.35); border-radius:20px; padding:4px 12px; font-family:var(--font); font-size:13px; font-weight:700; color:var(--gold); cursor:pointer; transition:all 0.18s; }
.credit-badge:hover { background:rgba(232,184,75,0.25); }
.credit-coin { font-size:14px; }
.pkg-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(150px,1fr)); gap:14px; margin-bottom:20px; }
.pkg-card { background:var(--bg3); border:2px solid var(--border); border-radius:12px; padding:18px 12px; text-align:center; cursor:pointer; transition:all 0.2s; position:relative; overflow:visible; }
.pkg-card:hover { border-color:var(--gold); transform:translateY(-2px); }
.pkg-card.selected { border-color:var(--gold); background:rgba(232,184,75,0.08); }
.pkg-card.trial-pkg { border-color:rgba(30,142,62,0.35); background:rgba(30,142,62,0.04); }
.pkg-card.trial-pkg:hover { border-color:var(--green); }
.pkg-card.trial-pkg.selected { border-color:var(--green); background:rgba(30,142,62,0.1); }
.pkg-thb { font-family:var(--font); font-size:26px; font-weight:900; color:var(--text); }
.pkg-credits { font-size:13px; color:var(--gold); font-family:var(--font); font-weight:700; margin:4px 0; }
.pkg-bonus { font-size:11px; color:var(--green); font-weight:600; }
.promo-badge { position:absolute; top:8px; right:8px; background:var(--red); color:#fff; font-size:10px; font-family:var(--font); font-weight:800; padding:3px 8px; border-radius:12px; }
.promo-original { font-size:12px; color:var(--text3); text-decoration:line-through; margin-left:6px; }
.credit-history-row { display:grid; grid-template-columns:36px 1fr 100px 90px; align-items:center; gap:10px; padding:10px 14px; border-bottom:1px solid rgba(148,180,230,0.06); }
.credit-history-row:last-child { border-bottom:none; }
.txn-icon { width:32px; height:32px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:14px; }
.txn-amount-pos { font-family:var(--font); font-weight:800; color:var(--green); }
.txn-amount-neg { font-family:var(--font); font-weight:800; color:var(--red); }
.exam-credit-price { display:flex; align-items:center; gap:6px; font-family:var(--font); font-size:16px; font-weight:800; color:var(--gold); }
.exam-credit-price .credit-icon { font-size:16px; }


/* ─── AI GENERATOR ─── */
.ai-studio { display:grid; grid-template-columns:360px 1fr; gap:20px; }
.ai-panel { background:var(--bg3); border:1px solid var(--border); border-radius:12px; padding:20px; height:fit-content; }
.ai-result-panel { display:flex; flex-direction:column; gap:14px; }
.ai-gen-btn { background:linear-gradient(135deg,#4a9eff,#6c63d6); color:#fff; border:none; border-radius:10px; padding:14px 20px; width:100%; font-family:var(--font); font-size:16px; font-weight:700; cursor:pointer; display:flex; align-items:center; justify-content:center; gap:10px; transition:all 0.2s; }
.ai-gen-btn:hover:not(:disabled) { opacity:0.9; transform:translateY(-1px); box-shadow:0 6px 24px rgba(74,158,255,0.35); }
.ai-gen-btn:disabled { opacity:0.5; cursor:not-allowed; transform:none; }
.ai-thinking { display:flex; flex-direction:column; align-items:center; justify-content:center; padding:60px 20px; gap:16px; }
.ai-dots { display:flex; gap:8px; }
.ai-dot { width:10px; height:10px; border-radius:50%; background:var(--accent); animation:dotPulse 1.4s infinite ease-in-out; }
.ai-dot:nth-child(2){animation-delay:0.2s;} .ai-dot:nth-child(3){animation-delay:0.4s;}
@keyframes dotPulse { 0%,80%,100%{transform:scale(0.6);opacity:0.4} 40%{transform:scale(1);opacity:1} }
.q-review-card { background:var(--card); border:1.5px solid var(--border); border-radius:12px; overflow:hidden; transition:border-color 0.2s; }
.q-review-card.approved { border-color:var(--green); }
.q-review-card.rejected { border-color:var(--red); opacity:0.55; }
.q-review-head { display:flex; align-items:center; gap:10px; padding:12px 16px; background:var(--bg3); border-bottom:1px solid var(--border); }
.q-review-num { font-family:var(--font); font-size:13px; font-weight:700; color:var(--text2); }
.q-review-diff { padding:2px 10px; border-radius:12px; font-size:11px; font-family:var(--font); font-weight:700; }
.q-review-body { padding:16px; }
.q-review-text { font-family:var(--font); font-size:15px; font-weight:600; line-height:1.6; margin-bottom:14px; }
.q-review-opts { display:grid; grid-template-columns:1fr 1fr; gap:6px; margin-bottom:12px; }
.q-review-opt { padding:8px 12px; border-radius:7px; font-size:13px; border:1.5px solid var(--border2); display:flex; gap:8px; align-items:flex-start; }
.q-review-opt.correct { background:rgba(52,200,122,0.12); border-color:var(--green); color:var(--green); }
.q-review-explain { font-size:12px; color:var(--text2); background:var(--bg3); padding:8px 12px; border-radius:6px; border-left:3px solid var(--accent); line-height:1.6; }
.q-review-actions { display:flex; gap:8px; padding:10px 16px; border-top:1px solid var(--border); background:rgba(0,0,0,0.1); }
.ai-progress { background:var(--bg3); border:1px solid var(--border); border-radius:10px; padding:16px; }
.ai-progress-bar-wrap { height:8px; background:var(--bg4); border-radius:4px; overflow:hidden; margin-top:8px; }
.ai-progress-bar { height:100%; border-radius:4px; background:linear-gradient(90deg,#4a9eff,#6c63d6); transition:width 0.5s; }
.ai-log { background:var(--bg); border:1px solid var(--border); border-radius:8px; padding:12px; font-family:monospace; font-size:12px; color:var(--teal); max-height:120px; overflow-y:auto; margin-top:10px; }
.ai-log-line { margin-bottom:2px; }
.ai-settings-badge { display:inline-flex; align-items:center; gap:5px; background:rgba(108,99,214,0.15); border:1px solid rgba(108,99,214,0.3); color:var(--accent2); border-radius:6px; padding:3px 10px; font-size:11px; font-family:var(--font); font-weight:700; }
.ai-batch-controls { display:flex; align-items:center; gap:10px; flex-wrap:wrap; padding:12px 16px; background:var(--bg3); border-radius:10px; }
@media(max-width:900px){ .ai-studio { grid-template-columns:1fr; } }


/* ─── FILE SHOP — Professional Redesign ─── */

/* ── Product Card ── */
@keyframes cardFadeIn { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:none} }
.file-card {
  background:var(--card); border:1px solid var(--border); border-radius:18px;
  overflow:hidden; display:flex; flex-direction:column;
  transition:transform 0.22s cubic-bezier(.2,.8,.3,1), border-color 0.2s, box-shadow 0.2s;
  animation:cardFadeIn 0.3s ease both;
  position:relative;
}
.file-card:hover { transform:translateY(-5px); border-color:var(--accent); box-shadow:0 12px 32px rgba(74,158,255,0.14), 0 2px 8px rgba(0,0,0,0.06); }
.file-card-banner {
  height:140px; display:flex; align-items:center; justify-content:center;
  font-size:62px; position:relative; overflow:hidden;
}
.file-card-banner::after {
  content:''; position:absolute; inset:0;
  background:linear-gradient(180deg,transparent 50%,rgba(0,0,0,0.18) 100%);
  pointer-events:none;
}
.file-type-badge {
  position:absolute; top:10px; right:10px; padding:3px 10px; border-radius:8px;
  font-size:11px; font-family:var(--font); font-weight:800; letter-spacing:0.5px;
  backdrop-filter:blur(6px); z-index:1;
}
.file-promo-badge {
  position:absolute; top:10px; left:10px; padding:3px 9px; border-radius:8px;
  background:var(--red); color:#fff; font-size:10px; font-family:var(--font);
  font-weight:800; z-index:1; letter-spacing:0.3px;
}
.file-pt-badge {
  position:absolute; bottom:10px; left:10px; padding:3px 10px; border-radius:8px;
  font-size:10px; font-family:var(--font); font-weight:700; z-index:1;
  backdrop-filter:blur(6px);
}
.file-card-body { padding:16px 18px; flex:1; display:flex; flex-direction:column; gap:0; }
.file-card-title { font-family:var(--font); font-size:15px; font-weight:700; margin-bottom:6px; line-height:1.4; }
.file-card-desc { font-size:12px; color:var(--text2); line-height:1.65; margin-bottom:10px; flex:1;
  display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden; }
.file-card-chips { display:flex; gap:5px; flex-wrap:wrap; margin-bottom:10px; }
.file-chip { font-size:10px; padding:2px 8px; border-radius:5px; background:var(--bg3);
  color:var(--text2); border:1px solid var(--border); white-space:nowrap; }
.file-card-rating { display:flex; align-items:center; gap:6px; margin-bottom:8px; }
.file-card-stats { display:flex; gap:12px; font-size:11px; color:var(--text3); margin-bottom:0; }
.file-card-footer {
  padding:12px 18px; border-top:1px solid var(--border);
  display:flex; align-items:center; justify-content:space-between; gap:10px;
  background:var(--bg2);
}
.file-price-block { display:flex; flex-direction:column; }
.file-price { font-family:var(--font); font-size:20px; font-weight:900; color:var(--gold); line-height:1.1; }
.file-price-original { font-size:11px; color:var(--text3); text-decoration:line-through; }
.file-price-baht { font-size:10px; color:var(--text2); margin-top:1px; }
.file-purchased { display:flex; align-items:center; gap:5px; color:var(--green); font-size:12px; font-family:var(--font); font-weight:700; }

/* ── Promo original ── */
.promo-original { font-size:11px; color:var(--text3); text-decoration:line-through; margin-left:5px; }

/* ── Download button ── */
.dl-btn {
  display:inline-flex; align-items:center; gap:6px; padding:8px 18px; border-radius:10px;
  border:none; cursor:pointer; font-family:var(--font); font-size:13px; font-weight:700;
  background:linear-gradient(135deg,#2ecc71,#1e8e3e); color:#fff;
  transition:all 0.18s; box-shadow:0 2px 8px rgba(30,142,62,0.3);
}
.dl-btn:hover { background:linear-gradient(135deg,#27ae60,#1a7a35); transform:translateY(-1px); box-shadow:0 4px 12px rgba(30,142,62,0.4); }
.dl-btn-sm { padding:6px 14px; font-size:12px; border-radius:8px; }

/* ── Upload area ── */
.upload-area { border:2px dashed var(--border2); border-radius:14px; padding:36px 24px; text-align:center; cursor:pointer; transition:all 0.2s; }
.upload-area:hover, .upload-area.dragover { border-color:var(--accent); background:rgba(74,158,255,0.04); }
.upload-area-icon { font-size:44px; margin-bottom:10px; }

/* ── File Grid ── */
.file-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:20px; }

/* ── File Row (My Downloads) ── */
.file-row { display:grid; grid-template-columns:46px 1fr auto; align-items:center; gap:14px; padding:13px 18px; border-bottom:1px solid var(--border); font-size:13px; transition:background 0.14s; }
.file-row:last-child { border-bottom:none; }
.file-row:hover { background:var(--bg3); }
.file-type-icon { font-size:28px; text-align:center; }

/* ── Filter chips ── */
.filter-chips { display:flex; gap:8px; flex-wrap:wrap; margin-bottom:16px; }
.chip {
  padding:7px 16px; border-radius:20px; border:1.5px solid var(--border2);
  font-size:12px; font-family:var(--font); font-weight:600; cursor:pointer;
  transition:all 0.15s; color:var(--text2); background:transparent; white-space:nowrap;
}
.chip:hover { border-color:var(--accent); color:var(--accent); background:rgba(74,158,255,0.06); }
.chip.active { border-color:var(--accent); color:var(--accent); background:rgba(74,158,255,0.1); }

/* ── Cat tabs (top) ── */
.file-cat-tab {
  display:inline-flex; align-items:center; gap:6px; padding:8px 18px; border-radius:10px;
  border:1.5px solid var(--border2); font-size:13px; font-family:var(--font); font-weight:600;
  cursor:pointer; transition:all 0.18s; color:var(--text2); background:var(--card); white-space:nowrap;
  box-shadow:0 1px 3px rgba(0,0,0,0.06);
}
.file-cat-tab:hover { border-color:var(--accent); color:var(--accent); background:rgba(74,158,255,0.04); }
.file-cat-tab.active { border-color:var(--accent); color:var(--accent); background:rgba(74,158,255,0.1); box-shadow:0 2px 8px rgba(74,158,255,0.15); }

/* ── Sort bar ── */
.fs-toolbar { display:flex; gap:10px; align-items:center; flex-wrap:wrap; margin-bottom:18px; padding:12px 16px; background:var(--bg2); border:1px solid var(--border); border-radius:12px; }

/* ── Stat cards in fileshop ── */
.fs-stat { background:var(--card); border:1px solid var(--border); border-radius:12px; padding:14px 18px; display:flex; align-items:center; gap:12px; }
.fs-stat-icon { width:40px; height:40px; border-radius:10px; display:flex; align-items:center; justify-content:center; font-size:20px; flex-shrink:0; }
.fs-stat-val { font-family:var(--font); font-size:22px; font-weight:800; line-height:1; }
.fs-stat-lbl { font-size:11px; color:var(--text2); margin-top:2px; }

/* ── My Downloads section ── */
.my-dl-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:14px; }
.my-dl-table { background:var(--card); border:1px solid var(--border); border-radius:14px; overflow:hidden; }
.my-dl-table-head { display:grid; grid-template-columns:46px 1fr auto; padding:10px 18px; background:var(--bg3); border-bottom:1px solid var(--border); font-size:11px; color:var(--text2); font-family:var(--font); font-weight:700; text-transform:uppercase; letter-spacing:0.5px; }

/* ── File Detail Modal ── */
.fd-banner { border-radius:12px; overflow:hidden; margin-bottom:18px; position:relative; height:160px; display:flex; align-items:center; justify-content:center; }
.fd-info-grid { display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-bottom:16px; }
.fd-info-card { background:var(--bg3); border-radius:10px; padding:10px 14px; }
.fd-info-label { font-size:11px; color:var(--text2); margin-bottom:2px; font-weight:600; }
.fd-info-val { font-size:13px; font-weight:700; }
.fd-price-box { background:linear-gradient(135deg,rgba(227,116,0,0.06),rgba(227,116,0,0.12)); border:1px solid rgba(227,116,0,0.25); border-radius:12px; padding:16px 18px; margin-bottom:16px; display:flex; align-items:center; justify-content:space-between; }

@media(max-width:768px){
  .file-grid { grid-template-columns:1fr; }
  .file-row { grid-template-columns:40px 1fr auto; }
  .fs-toolbar { flex-direction:column; align-items:stretch; }
  .fd-info-grid { grid-template-columns:1fr; }
}


/* ─── ADMIN DASHBOARD ─── */
.db-kpi-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:14px; margin-bottom:24px; }
.db-kpi { background:var(--card); border:1px solid var(--border); border-radius:14px; padding:18px 20px; position:relative; overflow:hidden; }
.db-kpi::before { content:''; position:absolute; top:-20px; right:-20px; width:80px; height:80px; border-radius:50%; opacity:0.07; }
.db-kpi-label { font-size:12px; color:var(--text2); font-family:var(--font); font-weight:600; text-transform:uppercase; letter-spacing:0.4px; margin-bottom:8px; }
.db-kpi-value { font-family:var(--font); font-size:32px; font-weight:900; line-height:1; margin-bottom:4px; }
.db-kpi-sub { font-size:12px; color:var(--text2); display:flex; align-items:center; gap:4px; }
.db-kpi-trend-up   { color:var(--green); }
.db-kpi-trend-down { color:var(--red); }
.db-kpi-icon { position:absolute; top:16px; right:18px; font-size:28px; opacity:0.35; }

/* Period selector */
.period-tabs { display:inline-flex; background:var(--bg3); border:1px solid var(--border); border-radius:10px; padding:3px; gap:2px; margin-bottom:20px; }
.period-tab { padding:7px 18px; border-radius:7px; font-size:13px; font-family:var(--font); font-weight:600; cursor:pointer; color:var(--text2); transition:all 0.15s; border:none; background:transparent; }
.period-tab:hover { color:var(--text); }
.period-tab.active { background:var(--bg4); color:var(--text); box-shadow:0 1px 4px rgba(0,0,0,0.2); }

/* Chart canvas area */
.chart-card { background:var(--card); border:1px solid var(--border); border-radius:14px; padding:20px; }
.chart-card-title { font-family:var(--font); font-size:15px; font-weight:700; margin-bottom:16px; display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:8px; }
.bar-chart-wrap { display:flex; align-items:flex-end; gap:4px; height:160px; padding-bottom:20px; position:relative; }
.bar-col { display:flex; flex-direction:column; align-items:center; gap:2px; flex:1; min-width:20px; position:relative; }
.bar-fill { width:100%; border-radius:4px 4px 0 0; min-height:3px; transition:height 0.4s, opacity 0.2s; cursor:pointer; }
.bar-fill:hover { opacity:0.8; }
.bar-label { font-size:9px; color:var(--text3); white-space:nowrap; position:absolute; bottom:-18px; width:200%; text-align:center; left:-50%; }
.bar-val { font-size:9px; color:var(--text2); position:absolute; top:-16px; white-space:nowrap; }

/* Category breakdown */
.cat-breakdown { display:flex; flex-direction:column; gap:8px; }
.cat-br-row { display:flex; align-items:center; gap:10px; }
.cat-br-label { font-size:13px; font-weight:600; min-width:160px; display:flex; align-items:center; gap:6px; }
.cat-br-bar-wrap { flex:1; height:10px; background:var(--bg4); border-radius:5px; overflow:hidden; }
.cat-br-bar { height:100%; border-radius:5px; transition:width 0.5s; }
.cat-br-val { font-family:var(--font); font-size:13px; font-weight:700; min-width:70px; text-align:right; }
.cat-br-pct { font-size:11px; color:var(--text2); min-width:36px; text-align:right; }

/* Top sellers table */
.top-table { width:100%; font-size:13px; }
.top-table td { padding:9px 6px; border-bottom:1px solid rgba(148,180,230,0.06); vertical-align:middle; }
.top-table tr:last-child td { border-bottom:none; }
.top-table tr:hover td { background:var(--bg3); }

/* Heatmap calendar */
.heatmap { display:grid; grid-template-columns:repeat(53,1fr); gap:2px; }
.heat-cell { width:100%; aspect-ratio:1; border-radius:2px; cursor:pointer; transition:opacity 0.15s; }
.heat-cell:hover { opacity:0.7; }

/* Donut chart SVG */
.donut-wrap { display:flex; align-items:center; gap:20px; flex-wrap:wrap; }
.donut-legend { display:flex; flex-direction:column; gap:6px; flex:1; min-width:120px; }
.donut-legend-item { display:flex; align-items:center; gap:8px; font-size:12px; }
.donut-dot { width:10px; height:10px; border-radius:50%; flex-shrink:0; }

/* Dashboard grid layout */
.db-grid-2 { display:grid; grid-template-columns:2fr 1fr; gap:16px; margin-bottom:16px; }
.db-grid-equal { display:grid; grid-template-columns:1fr 1fr; gap:16px; margin-bottom:16px; }
.db-grid-3 { display:grid; grid-template-columns:1fr 1fr 1fr; gap:16px; margin-bottom:16px; }

/* Date range picker */
.date-range { display:flex; gap:8px; align-items:center; flex-wrap:wrap; }
.date-range label { font-size:12px; color:var(--text2); }
.date-range input[type=date] { padding:6px 10px; background:var(--bg3); border:1.5px solid var(--border2); border-radius:7px; color:var(--text); font-family:var(--font2); font-size:12px; }

@media(max-width:900px){
  .db-grid-2,.db-grid-equal,.db-grid-3 { grid-template-columns:1fr; }
}


/* ─── EXAM FULL REVIEW ─── */
#practice-report-overlay { position:fixed; inset:0; background:var(--bg); z-index:250; overflow-y:auto; }
.pr-header { background:var(--bg2); border-bottom:1px solid var(--border); padding:16px 24px; display:flex; align-items:center; gap:14px; position:sticky; top:0; z-index:10; backdrop-filter:blur(10px); }
.pr-content { max-width:860px; margin:0 auto; padding:28px 20px 60px; }
.pr-summary-card { background:var(--card); border:1px solid var(--border); border-radius:16px; padding:24px; margin-bottom:28px; }
.pr-grade-ring { width:110px; height:110px; border-radius:50%; border:5px solid; display:flex; flex-direction:column; align-items:center; justify-content:center; flex-shrink:0; }
.pr-grade-level { font-family:var(--font); font-size:13px; font-weight:700; margin-top:2px; }
.pr-kpi-row { display:grid; grid-template-columns:repeat(auto-fit,minmax(120px,1fr)); gap:10px; }
.pr-kpi { background:var(--bg3); border-radius:10px; padding:12px; text-align:center; }
.pr-kpi-val { font-family:var(--font); font-size:22px; font-weight:900; }
.pr-kpi-lbl { font-size:11px; color:var(--text2); margin-top:3px; }
.pr-filter-row { display:flex; gap:8px; flex-wrap:wrap; margin-bottom:18px; align-items:center; }
.pr-filter-btn { padding:6px 16px; border-radius:20px; border:1.5px solid var(--border2); font-size:12px; font-family:var(--font); font-weight:600; cursor:pointer; background:transparent; color:var(--text2); transition:all 0.15s; }
.pr-filter-btn:hover, .pr-filter-btn.active { border-color:var(--accent); color:var(--accent); background:rgba(74,158,255,0.08); }
.pr-filter-btn.active-correct { border-color:var(--green); color:var(--green); background:rgba(52,200,122,0.08); }
.pr-filter-btn.active-wrong { border-color:var(--red); color:var(--red); background:rgba(231,82,82,0.08); }

/* Review question card */
.review-q-card { background:var(--card); border:1.5px solid var(--border); border-radius:14px; margin-bottom:16px; overflow:hidden; transition:box-shadow 0.2s; }
.review-q-card:hover { box-shadow: var(--shadow-hover); }
.review-q-card.rq-correct { border-left:5px solid var(--green); }
.review-q-card.rq-wrong   { border-left:5px solid var(--red); }
.review-q-card.rq-timeout { border-left:5px solid var(--text3); }
.rq-head { display:flex; align-items:center; gap:10px; padding:12px 16px; background:var(--bg3); border-bottom:1px solid var(--border); }
.rq-status-icon { font-size:20px; flex-shrink:0; }
.rq-num { font-family:var(--font); font-size:13px; font-weight:700; color:var(--text2); }
.rq-diff-badge { padding:2px 10px; border-radius:12px; font-size:11px; font-family:var(--font); font-weight:700; }
.rq-time { font-size:11px; color:var(--text3); margin-left:auto; }
.rq-body { padding:18px; }
.rq-question { font-family:var(--font); font-size:16px; font-weight:600; line-height:1.65; color:#e4eefc; margin-bottom:16px; }
.rq-options { display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-bottom:14px; }
.rq-opt { display:flex; align-items:flex-start; gap:10px; padding:10px 14px; border-radius:9px; border:1.5px solid var(--border2); font-size:14px; line-height:1.5; }
.rq-opt.opt-correct  { background:rgba(52,200,122,0.12); border-color:var(--green); color:var(--green); }
.rq-opt.opt-user-wrong { background:rgba(231,82,82,0.12); border-color:var(--red); color:var(--red); }
.rq-opt.opt-neutral  { color:var(--text2); }
.rq-opt-letter { font-family:var(--font); font-weight:800; font-size:13px; min-width:18px; flex-shrink:0; }
.rq-opt-icon { margin-left:auto; flex-shrink:0; font-size:14px; }
.rq-explain { background:rgba(74,158,255,0.07); border:1px solid rgba(74,158,255,0.2); border-radius:9px; padding:12px 14px; font-size:13px; color:var(--text2); line-height:1.75; }
.rq-explain strong { color:var(--accent); font-weight:700; }
.rq-tag-correct { background:rgba(52,200,122,0.15); color:var(--green); border-color:rgba(52,200,122,0.3); }
.rq-tag-wrong   { background:rgba(231,82,82,0.15); color:var(--red);   border-color:rgba(231,82,82,0.3); }
.rq-tag-timeout { background:rgba(90,96,112,0.15); color:var(--text3); border-color:rgba(90,96,112,0.3); }
.pr-progress-bar-outer { height:8px; background:var(--bg4); border-radius:4px; overflow:hidden; margin:10px 0; }
.pr-progress-correct  { height:100%; background:var(--green); display:inline-block; border-radius:4px 0 0 4px; }
.pr-progress-wrong    { height:100%; background:var(--red);   display:inline-block; }

@media(max-width:640px){
  .rq-options { grid-template-columns:1fr; }
  .pr-kpi-row { grid-template-columns:repeat(2,1fr); }
  .pr-header { padding:12px 16px; }
}


/* ─── HOMEPAGE REDESIGN ─── */
.hero-new { padding:110px 24px 70px; text-align:center; max-width:960px; margin:0 auto; position:relative; }
.hero-new::before { content:''; position:absolute; top:0; left:50%; transform:translateX(-50%); width:600px; height:400px; background:radial-gradient(ellipse,rgba(74,158,255,0.08) 0%,transparent 70%); pointer-events:none; }

/* Credit packages on homepage */
.hp-pkg-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:16px; max-width:1100px; margin:0 auto; padding:0 24px 60px; }
.hp-pkg-card { background:var(--card); border:2px solid var(--border); border-radius:16px; padding:24px 20px; text-align:center; position:relative; overflow:hidden; transition:transform 0.22s, border-color 0.22s, box-shadow 0.22s; cursor:pointer; }
.hp-pkg-card:hover { transform:translateY(-4px); border-color:var(--accent); box-shadow: var(--shadow-hover); }
.hp-pkg-card.best { border-color:var(--gold); }
.hp-pkg-card.best::before { content:'⭐ คุ้มที่สุด'; position:absolute; top:0; left:50%; transform:translateX(-50%); background:var(--gold); color:#fff; font-size:11px; font-family:var(--font); font-weight:800; padding:4px 18px; border-radius:0 0 10px 10px; white-space:nowrap; }
.hp-pkg-card.promo { border-color:var(--red); }
.hp-pkg-card.promo::before { content:'🔥 Flash Sale'; position:absolute; top:0; left:50%; transform:translateX(-50%); background:var(--red); color:#fff; font-size:11px; font-family:var(--font); font-weight:800; padding:4px 18px; border-radius:0 0 10px 10px; white-space:nowrap; }
.hp-pkg-baht { font-family:var(--font); font-size:40px; font-weight:900; color:var(--text); line-height:1; }
.hp-pkg-baht span { font-size:18px; font-weight:500; color:var(--text2); }
.hp-pkg-credits { font-size:15px; font-weight:700; font-family:var(--font); margin:8px 0 4px; color:var(--gold); }
.hp-pkg-bonus { font-size:12px; color:var(--green); font-weight:600; margin-bottom:12px; min-height:18px; }
.hp-pkg-rate { font-size:11px; color:var(--text3); margin-bottom:16px; }
.hp-pkg-features { text-align:left; margin-bottom:18px; }
.hp-pkg-features li { font-size:13px; color:var(--text2); padding:3px 0; display:flex; align-items:center; gap:6px; }
.hp-pkg-features li::before { content:'✓'; color:var(--green); font-weight:700; flex-shrink:0; }

/* Promo banner */
.promo-banner { background:linear-gradient(135deg,rgba(231,82,82,0.15),rgba(232,184,75,0.12)); border:1px solid rgba(231,82,82,0.3); border-radius:14px; padding:20px 24px; display:flex; align-items:center; gap:16px; max-width:860px; margin:0 auto 40px; flex-wrap:wrap; }
.promo-countdown { font-family:var(--font); font-size:28px; font-weight:900; color:var(--red); min-width:120px; }
.promo-countdown span { font-size:12px; color:var(--text2); display:block; margin-top:2px; }

/* How it works */
.how-steps { display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:20px; max-width:900px; margin:0 auto; padding:0 24px 60px; position:relative; }
.how-step { text-align:center; padding:24px 16px; }
.how-step-num { width:50px; height:50px; border-radius:50%; background:rgba(74,158,255,0.15); border:2px solid rgba(74,158,255,0.3); display:flex; align-items:center; justify-content:center; font-family:var(--font); font-size:20px; font-weight:900; color:var(--accent); margin:0 auto 14px; }
.how-step h3 { font-size:15px; font-weight:700; margin-bottom:6px; }
.how-step p { font-size:13px; color:var(--text2); line-height:1.6; }
.how-connector { position:absolute; top:48px; left:0; right:0; height:2px; background:linear-gradient(90deg,transparent,rgba(74,158,255,0.3),transparent); pointer-events:none; }

/* Testimonial / trust badges */
.trust-row { display:flex; gap:24px; justify-content:center; flex-wrap:wrap; padding:0 24px 50px; }
.trust-item { display:flex; align-items:center; gap:8px; font-size:13px; color:var(--text2); }
.trust-icon { font-size:20px; }

/* Remember me checkbox */
.remember-row { display:flex; align-items:center; gap:8px; margin-bottom:14px; cursor:pointer; }
.remember-row input[type=checkbox] { width:16px; height:16px; accent-color:var(--accent); cursor:pointer; }
.remember-row label { font-size:13px; color:var(--text2); cursor:pointer; }

@media(max-width:600px){
  .hp-pkg-grid { grid-template-columns:1fr 1fr; gap:12px; }
  .hp-pkg-baht { font-size:28px; }
  .promo-banner { flex-direction:column; text-align:center; }
}
@media(max-width:400px){ .hp-pkg-grid { grid-template-columns:1fr; } }


/* ─── API SETTINGS ─── */
.api-key-input { font-family:monospace; font-size:13px; letter-spacing:0.5px; }
.api-status-badge { display:inline-flex; align-items:center; gap:6px; padding:4px 12px; border-radius:20px; font-size:12px; font-family:var(--font); font-weight:700; }
.api-status-ok   { background:rgba(52,200,122,0.15); color:var(--green); border:1px solid rgba(52,200,122,0.3); }
.api-status-none { background:rgba(231,82,82,0.15);  color:var(--red);   border:1px solid rgba(231,82,82,0.3); }
.api-status-test { background:rgba(232,184,75,0.15); color:var(--gold);  border:1px solid rgba(232,184,75,0.3); }
.model-card { background:var(--bg3); border:1.5px solid var(--border); border-radius:10px; padding:14px 16px; cursor:pointer; transition:border-color 0.2s; }
.model-card:hover { border-color:var(--accent); }
.model-card.selected { border-color:var(--accent); background:rgba(74,158,255,0.08); }
.model-card .model-name { font-family:var(--font); font-size:14px; font-weight:700; margin-bottom:2px; }
.model-card .model-desc { font-size:12px; color:var(--text2); }
.model-card .model-price { font-size:11px; color:var(--gold); margin-top:4px; }


/* ─── BACKUP SYSTEM ─── */
.backup-card { background:var(--card); border:1px solid var(--border); border-radius:14px; padding:20px; }
.backup-size { font-family:var(--font); font-size:28px; font-weight:900; color:var(--accent); }
.backup-key-row { display:flex; align-items:center; gap:8px; padding:8px 12px; background:var(--bg3); border-radius:8px; margin-bottom:6px; font-size:12px; }
.backup-key-name { font-family:monospace; color:var(--accent); min-width:160px; }
.backup-key-size { color:var(--text2); min-width:60px; text-align:right; }
.backup-key-bar-wrap { flex:1; height:4px; background:var(--bg4); border-radius:2px; overflow:hidden; }
.backup-key-bar { height:100%; border-radius:2px; background:var(--accent); }
.restore-drop { border:2px dashed var(--border2); border-radius:10px; padding:28px; text-align:center; cursor:pointer; transition:all 0.2s; }
.restore-drop:hover,.restore-drop.dragover { border-color:var(--accent); background:rgba(74,158,255,0.05); }


/* ─── BACKUP & RESTORE ─── */
.backup-zone { border:2px dashed var(--border2); border-radius:12px; padding:24px; text-align:center; transition:border-color 0.2s; }
.backup-zone:hover { border-color:var(--accent); }
.data-key-row { display:flex; align-items:center; justify-content:space-between; padding:8px 0; border-bottom:1px solid var(--border); font-size:13px; }
.data-key-row:last-child { border-bottom:none; }
.data-key-name { font-family:monospace; color:var(--accent); font-size:12px; }
.data-key-size { font-size:11px; color:var(--text2); }
.data-key-count { font-size:12px; color:var(--text2); }


/* ════════════════════════════════════════════════════════
   GOOGLE-STYLE LIGHT THEME — Complete Override
   ════════════════════════════════════════════════════════ */

/* ── Base ── */
body { background: var(--bg); color: var(--text); }

/* ── Navbar ── */
.navbar {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.nav-logo { color: var(--text); }
.nav-logo span { color: var(--accent); }
.nav-link { color: var(--text2); font-weight:500; }
.nav-link:hover { color: var(--accent); background:rgba(26,115,232,0.06) !important; border-radius:6px; }
.nav-user { background:transparent !important; }
.nav-xp { background: var(--bg3); color: var(--text2); border: 1px solid var(--border); }

/* ── Sidebar ── */
.sidebar { background: var(--bg2); border-right: 1px solid var(--border); }
.sidebar-item { color: var(--text2); border-radius:0 24px 24px 0 !important; margin-right:12px !important; }
.sidebar-item:hover, .sidebar-item.active { background:rgba(74,158,255,0.12) !important; color: var(--accent); }
.sidebar-divider { background:var(--border) !important; }

/* ── Cards ── */
.card, .stat-card { background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow) !important; }
.card:hover { box-shadow: var(--shadow-hover) !important; }

/* ── Inputs ── */
.input-field { background: #fff; border:1.5px solid var(--border2) !important; color: var(--text); }
.input-field:focus { border-color: var(--accent); box-shadow:0 0 0 3px rgba(26,115,232,0.12) !important; }
.input-field::placeholder { color: var(--text3); }
select.input-field { background: #fff; }
textarea.input-field { background: #fff; }

/* ── Buttons ── */
.btn-primary { background:var(--accent) !important; color:#fff !important; box-shadow:0 1px 2px rgba(60,64,67,0.2) !important; }
.btn-primary:hover { background:#1557b0 !important; box-shadow:0 2px 6px rgba(60,64,67,0.25) !important; }
.btn-gold { background:var(--gold) !important; color:#fff !important; }
.btn-gold:hover { background:#e08000 !important; }
.btn-outline { background: var(--bg2); border:1.5px solid var(--border2) !important; color: var(--text); }
.btn-outline:hover { background: var(--bg); border-color: var(--accent); color: var(--accent); }
.btn-success { background:var(--green) !important; color:#fff !important; }
.btn-danger  { background:var(--red) !important; color:#fff !important; }

/* ── Tabs ── */
.tabs { background: var(--bg3); border: 1px solid var(--border); border-radius:10px !important; }
.tab { color: var(--text2); }
.tab:hover { color: var(--text); background:rgba(0,0,0,0.04) !important; }
.tab.active { background: var(--bg2); color: var(--accent); box-shadow:0 1px 3px rgba(60,64,67,0.15) !important; font-weight:600 !important; }

/* ── Modals ── */
.modal-overlay { background:rgba(0,0,0,0.45) !important; }
.modal { background: #fff; border: 1px solid var(--border); box-shadow: 0 8px 30px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.08) !important; }
.modal-head { background: #fff; border-bottom: 1px solid var(--border); }
.modal-close { color: var(--text2); background:transparent !important; }
.modal-close:hover { background: var(--bg3); color: var(--text); }

/* ── Hero ── */
.hero, .hero-new { background:transparent !important; }
.hero-new::before { display:none !important; }
.hero-tag { background:rgba(74,158,255,0.12) !important; color: var(--accent); border:1px solid #c5d9fb !important; }
.highlight { color: var(--accent); }

/* ── Badges ── */
.badge { border-radius:6px !important; font-size:11px !important; }
.badge-blue   { background:rgba(74,158,255,0.12) !important; color: var(--accent); border:1px solid #c5d9fb !important; }
.badge-green  { background:rgba(52,200,122,0.12) !important; color:var(--green) !important; border:1px solid #ceead6 !important; }
.badge-red    { background:rgba(224,82,82,0.12) !important; color:var(--red) !important; border:1px solid #f5c6c3 !important; }
.badge-gray   { background: var(--bg3); color: var(--text2); border: 1px solid var(--border); }
.badge-gold   { background:rgba(232,184,75,0.12) !important; color:var(--gold) !important; border:1px solid #fde68a !important; }

/* ── Page backgrounds ── */
.page { background: var(--bg); }
#page-home { background: var(--bg2); }

/* ── Section backgrounds ── */
.section { background: var(--bg); }

/* ── Tables ── */
.admin-table thead tr { background: var(--bg3); }
.admin-table th { color: var(--text2); border-bottom:2px solid var(--border) !important; }
.admin-table td { border-bottom:1px solid var(--bg3) !important; color: var(--text); }
.admin-table tr:hover td { background: var(--bg); }

/* ── Exam interface ── */
#exam-interface { background: var(--bg2); }
#sim-interface  { background: var(--bg2); }
.exam-header { background: var(--bg2); border-bottom: 1px solid var(--border); box-shadow:0 1px 3px rgba(60,64,67,0.1) !important; }
.question-card { background: var(--bg2); border: 1px solid var(--border); box-shadow:0 1px 3px rgba(60,64,67,0.1) !important; }
.option-btn { background: var(--bg); border:1.5px solid var(--border2) !important; color: var(--text); }
.option-btn:hover { background:rgba(74,158,255,0.12) !important; border-color: var(--accent); }
.option-btn.correct { background:rgba(52,200,122,0.12) !important; border-color:var(--green) !important; color:var(--green) !important; }
.option-btn.wrong   { background:rgba(224,82,82,0.12) !important; border-color:var(--red) !important; color:var(--red) !important; }

/* ── Practice report ── */
#practice-report-overlay { background: var(--bg); }
.pr-header { background: var(--bg2); border-bottom: 1px solid var(--border); box-shadow:0 1px 3px rgba(60,64,67,0.1) !important; }
.pr-summary-card { background: var(--bg2); }
.pr-kpi { background: var(--bg); border: 1px solid var(--border); }
.review-q-card { background: var(--bg2); border-color:var(--border) !important; }
.rq-head { background: var(--bg); border-bottom: 1px solid var(--border); }
.rq-question { color: var(--text); }
.rq-opt { border-color:var(--border2) !important; }
.rq-opt.opt-neutral { color: var(--text); background: var(--bg2); }
.rq-opt.opt-correct { background:rgba(52,200,122,0.12) !important; border-color:var(--green) !important; color:var(--green) !important; }
.rq-opt.opt-user-wrong { background:rgba(224,82,82,0.12) !important; border-color:var(--red) !important; color:var(--red) !important; }
.rq-explain { background: var(--bg3); border-left:3px solid var(--accent) !important; color: var(--text2); }

/* ── Category/file cards ── */
.cat-card { background: var(--bg2); border-color:var(--border) !important; }
.cat-card:hover { border-color: var(--accent); box-shadow:0 2px 12px rgba(60,64,67,0.15) !important; }
.cat-stat { background: var(--bg); border: 1px solid var(--border); }
.file-card { background: var(--bg2); border-color:var(--border) !important; }

/* ── Leaderboard ── */
.lb100-row:hover { background: var(--bg); }
.lb100-row { border-bottom:1px solid var(--bg3) !important; }
.lb100-bar { background:var(--border2) !important; }
.lb100-bar .lb100-bar { background:var(--accent) !important; }

/* ── Credit badge ── */
.credit-badge { background:rgba(232,184,75,0.12) !important; border:1px solid #fde68a !important; color:#e37400 !important; }

/* ── Period tabs (dashboard) ── */
.period-tabs { background: var(--bg3); border: 1px solid var(--border); }
.period-tab.active { background: var(--bg2); color: var(--accent); }

/* ── Chart cards ── */
.chart-card { background: var(--bg2); border: 1px solid var(--border); box-shadow:0 1px 3px rgba(60,64,67,0.1) !important; }
.bar-fill { opacity:0.85 !important; }

/* ── Pricing / packages on home ── */
.hp-pkg-card { background: var(--bg2); border-color:var(--border) !important; }
.hp-pkg-card:hover { border-color: var(--accent); box-shadow:0 2px 12px rgba(60,64,67,0.15) !important; }
.hp-pkg-card.best { border-color:var(--gold) !important; }
.hp-pkg-card.selected { border-color: var(--accent); background:#f0f7ff !important; }

/* ── Footer ── */
.footer { background: var(--bg2); border-top:1px solid var(--border) !important; color: var(--text2); }

/* ── Mobile nav ── */
.mob-nav { background: var(--bg2); border-top:1px solid var(--border) !important; box-shadow:0 -1px 4px rgba(60,64,67,0.1) !important; }
.mob-nav-btn { color: var(--text2); }
.mob-nav-btn:hover, .mob-nav-btn.active { color: var(--accent); }
.mob-drawer { background: var(--bg2); }
.mob-overlay { background:rgba(0,0,0,0.4) !important; }

/* ── Code / monospace areas ── */
.ai-log { background: var(--bg); border: 1px solid var(--border); color: var(--accent); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width:8px; height:8px; }
::-webkit-scrollbar-track { background:var(--bg3); }
::-webkit-scrollbar-thumb { background:var(--border2); border-radius:4px; }
::-webkit-scrollbar-thumb:hover { background:#bdc1c6; }

/* ── Heatmap ── */
.heat-cell { opacity:0.9; }

/* ── Admin sections ── */
.admin-section { background:transparent !important; }
#admin-tabs { background: var(--bg3); }

/* ── Toast notifications ── */
.toast { background: var(--bg2); border: 1px solid var(--border); color: var(--text); box-shadow:0 4px 16px rgba(60,64,67,0.2) !important; }

/* ── Donut legend ── */
.donut-legend-item { color: var(--text2); }

/* ── AI panel ── */
.ai-panel { background: var(--bg); border: 1px solid var(--border); }
.ai-progress { background: var(--bg); border: 1px solid var(--border); }
.q-review-card { background: var(--bg2); border-color:var(--border) !important; }
.q-review-head { background: var(--bg); }
.q-review-body { background: var(--bg2); }

/* ── How-it-works ── */
.how-step-num { background:rgba(74,158,255,0.12) !important; border-color:#c5d9fb !important; color: var(--accent); }

/* ── Trust row ── */
.trust-item { color: var(--text2); }

/* ── Upload area ── */
.upload-area { border-color:var(--border2) !important; background: var(--bg); }
.upload-area:hover, .upload-area.dragover { border-color: var(--accent); background:#f0f7ff !important; }

/* ── Filter chips ── */
.chip { border-color:var(--border2) !important; color: var(--text2); background: var(--bg2); }
.chip:hover, .chip.active { border-color: var(--accent); color: var(--accent); background:rgba(74,158,255,0.12) !important; }

/* ── XP / level bars ── */
.xp-bar-wrap { background: var(--bg3); }

/* ── Result screen ── */
.result-screen { background: var(--bg2); }
.result-stats { background: var(--bg); }

/* ── Promo banner ── */
.promo-banner { background:linear-gradient(135deg,rgba(211,47,47,0.06),rgba(242,153,0,0.06)) !important; border:1px solid rgba(211,47,47,0.2) !important; }




/* ─── PDF IMPORT SYSTEM ─── */
.pdf-upload-zone {
  border: 2px dashed var(--border2);
  border-radius: 14px;
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: #fafafa;
  position: relative;
}
.pdf-upload-zone:hover, .pdf-upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(74,158,255,0.12);
}
.pdf-upload-zone.has-file {
  border-color: var(--green);
  background: rgba(52,200,122,0.12);
  padding: 20px 24px;
}
.pdf-preview-box {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  margin-top: 12px;
}
.pdf-page-thumb {
  width: 48px;
  height: 64px;
  background: rgba(224,82,82,0.12);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  border: 1px solid #f5c6c2;
}
.pdf-analyze-progress {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-top: 12px;
}
.pdf-progress-bar-wrap { height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; margin: 8px 0; }
.pdf-progress-bar-fill { height: 100%; background: linear-gradient(90deg,var(--accent),#673ab7); border-radius: 3px; transition: width 0.4s; }
.pdf-step-list { display: flex; flex-direction: column; gap: 6px; margin-top: 10px; }
.pdf-step { display: flex; align-items: center; gap: 10px; font-size: 13px; padding: 6px 10px; border-radius: 6px; }
.pdf-step.done    { color: var(--green); background: rgba(52,200,122,0.12); }
.pdf-step.active  { color: var(--accent); background: rgba(74,158,255,0.12); }
.pdf-step.waiting { color: var(--text3); }
.pdf-content-preview {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 12px;
  color: var(--text2);
  max-height: 120px;
  overflow-y: auto;
  line-height: 1.7;
  font-family: monospace;
  margin-top: 10px;
  white-space: pre-wrap;
}
.mode-toggle { display: flex; background: var(--bg3); border-radius: 10px; padding: 3px; gap: 2px; }
.mode-btn { flex: 1; padding: 8px 12px; border-radius: 7px; font-size: 13px; font-family: var(--font); font-weight: 600; cursor: pointer; border: none; background: transparent; color: var(--text2); transition: all 0.15s; text-align: center; }
.mode-btn.active { background: #fff; color: var(--text); box-shadow: var(--shadow); }


/* ─── PDF TO EXAM ANALYZER ─── */
.pdf-upload-zone {
  border: 2px dashed var(--border2);
  border-radius: 16px;
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--bg3);
  position: relative;
}
.pdf-upload-zone:hover, .pdf-upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(74,158,255,0.12);
}
.pdf-upload-zone .pdf-icon { font-size: 64px; margin-bottom: 14px; display: block; }
.pdf-file-preview {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(74,158,255,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 110%, rgba(108,99,214,0.05) 0%, transparent 55%);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  margin-bottom: 16px;
}
.pdf-file-thumb {
  width: 56px; height: 64px;
  background: linear-gradient(135deg,var(--red),#e8453c);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 800; color: #fff;
  letter-spacing: 0.5px; flex-shrink: 0;
}
.pdf-progress-wrap {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 16px 0;
}
.pdf-progress-bar-outer {
  height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; margin: 8px 0;
}
.pdf-progress-bar { height: 100%; background: linear-gradient(90deg,var(--accent),#673ab7); border-radius: 3px; transition: width 0.4s; }
.pdf-log { font-family: monospace; font-size: 12px; color: var(--accent); max-height: 100px; overflow-y: auto; padding: 8px; background: var(--bg3); border-radius: 6px; border: 1px solid var(--border); margin-top: 8px; }
.pdf-settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 16px; }
.pdf-mode-card {
  border: 2px solid var(--border); border-radius: 10px; padding: 14px;
  cursor: pointer; transition: all 0.2s; background: #fff;
}
.pdf-mode-card:hover { border-color: var(--accent); background: rgba(74,158,255,0.12); }
.pdf-mode-card.selected { border-color: var(--accent); background: rgba(74,158,255,0.12); }
.pdf-mode-icon { font-size: 24px; margin-bottom: 6px; }
.pdf-mode-name { font-size: 13px; font-weight: 700; color: var(--text); margin-bottom: 3px; }
.pdf-mode-desc { font-size: 11px; color: var(--text2); }
.pdf-section-divider {
  display: flex; align-items: center; gap: 12px; margin: 20px 0;
  color: var(--text3); font-size: 12px;
}
.pdf-section-divider::before, .pdf-section-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
@media(max-width:600px){ .pdf-settings-grid { grid-template-columns: 1fr; } }