/* =====================================================
   REVIEW SUBJECT - STUDY APP v2
   Dark Glassmorphism Design System
===================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ── CSS Variables ── */
:root {
  --bg-base: #0d0f17;
  --bg-surface: #13161f;
  --bg-elevated: #1a1e2e;
  --glass: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-hover: rgba(255, 255, 255, 0.09);
  --accent: #6c63ff;
  --accent-light: #8b85ff;
  --accent-glow: rgba(108, 99, 255, 0.3);
  --success: #22c55e;
  --success-glow: rgba(34, 197, 94, 0.2);
  --danger: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.2);
  --warning: #f59e0b;
  --text-primary: #f0f2ff;
  --text-secondary: #8b90a7;
  --text-muted: #555a72;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; transition: font-size 0.2s ease; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Background blobs */
body::before {
  content: '';
  position: fixed; top: -20%; left: -10%;
  width: 60vw; height: 60vw;
  background: radial-gradient(ellipse, rgba(108,99,255,0.12) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
}
body::after {
  content: '';
  position: fixed; bottom: -20%; right: -10%;
  width: 50vw; height: 50vw;
  background: radial-gradient(ellipse, rgba(34,197,94,0.07) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
}

#app { position: relative; z-index: 1; min-height: 100vh; display: flex; flex-direction: column; }

/* ── Navbar ── */
.navbar {
  display: flex; align-items: center; gap: 16px;
  padding: 18px 40px;
  border-bottom: 1px solid var(--glass-border);
  background: rgba(13,15,23,0.85);
  backdrop-filter: blur(16px);
  position: sticky; top: 0; z-index: 100;
}
.navbar .logo {
  font-size: 1.35rem; font-weight: 800;
  background: linear-gradient(135deg, var(--accent-light), #a78bfa);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  cursor: pointer; white-space: nowrap;
}
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.83rem; color: var(--text-secondary); flex: 1; flex-wrap: wrap; }
.breadcrumb span { cursor: pointer; transition: color var(--transition); }
.breadcrumb span:hover { color: var(--text-primary); }
.breadcrumb .sep { color: var(--text-muted); }
.breadcrumb .active { color: var(--text-primary); font-weight: 500; cursor: default; }

/* ── Main Content ── */
.main-content { flex: 1; padding: 48px 40px; max-width: 1200px; width: 100%; margin: 0 auto; }

.page-title { font-size: 2.2rem; font-weight: 800; margin-bottom: 8px; letter-spacing: -0.5px; }
.page-subtitle { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 40px; }

/* ── Section label ── */
.section-label {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--text-muted); margin-bottom: 14px;
}

/* ── Card Grid ── */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }

.subject-card {
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 32px 28px;
  cursor: pointer; transition: all var(--transition);
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; gap: 12px;
}
.subject-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), #a78bfa); opacity: 0; transition: opacity var(--transition);
}
.subject-card:hover { background: var(--glass-hover); border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 12px 40px var(--accent-glow); }
.subject-card:hover::before { opacity: 1; }
.subject-card .icon { width: 52px; height: 52px; background: linear-gradient(135deg, var(--accent), #a78bfa); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; }
.subject-card .name { font-size: 1.2rem; font-weight: 700; }
.subject-card .meta { font-size: 0.82rem; color: var(--text-secondary); }
.subject-card .pill { display: inline-flex; align-items: center; gap: 4px; background: var(--accent-glow); border: 1px solid rgba(108,99,255,0.3); border-radius: 999px; padding: 3px 10px; font-size: 0.75rem; color: var(--accent-light); font-weight: 600; width: fit-content; }

/* ── Session List ── */
.session-list { display: flex; flex-direction: column; gap: 12px; }
.session-item {
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius-md); padding: 18px 22px;
  display: flex; align-items: center; justify-content: space-between;
  cursor: pointer; transition: all var(--transition);
}
.session-item:hover { background: var(--glass-hover); border-color: rgba(108,99,255,0.4); transform: translateX(4px); }
.session-item .session-info { display: flex; flex-direction: column; gap: 4px; }
.session-item .session-name { font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.session-meta { font-size: 0.8rem; color: var(--text-muted); }
.session-arrow { font-size: 1.2rem; color: var(--text-muted); transition: transform var(--transition); }
.session-item:hover .session-arrow { transform: translateX(4px); color: var(--accent-light); }
.ai-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 6px;
  border-radius: 4px;
  background: linear-gradient(135deg, rgba(245,158,11,0.2), rgba(234,88,12,0.15));
  color: var(--warning);
  border: 1px solid rgba(245,158,11,0.3);
  margin-left: 8px;
  vertical-align: middle;
}

.session-item.bank { border-color: rgba(108,99,255,0.25); background: linear-gradient(135deg, rgba(108,99,255,0.08), rgba(167,139,250,0.04)); }
.session-item.bank:hover { border-color: var(--accent); }

/* ── Mode Selection ── */
.mode-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 680px; }
.mode-card {
  background: var(--glass); border: 2px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 36px 28px;
  cursor: pointer; transition: all var(--transition);
  text-align: center; display: flex; flex-direction: column; align-items: center; gap: 14px;
}
.mode-card:hover { border-color: var(--accent); transform: translateY(-6px); box-shadow: 0 16px 48px var(--accent-glow); }
.mode-card .mode-icon { font-size: 2.8rem; }
.mode-card .mode-name { font-size: 1.2rem; font-weight: 700; }
.mode-card .mode-desc { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.55; }
.mode-card.mode-learn:hover { border-color: #22c55e; box-shadow: 0 16px 48px var(--success-glow); }
.mode-card.mode-exam:hover { border-color: #f59e0b; box-shadow: 0 16px 48px rgba(245,158,11,0.2); }

/* ── Loading ── */
.loading { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; padding: 80px; color: var(--text-secondary); }
.spinner { width: 40px; height: 40px; border: 3px solid var(--glass-border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px; border: none; border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif; font-size: 0.88rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition); text-decoration: none; white-space: nowrap;
}
.btn-primary { background: linear-gradient(135deg, var(--accent), #8b85ff); color: white; box-shadow: 0 4px 16px var(--accent-glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px var(--accent-glow); }
.btn-primary:active { transform: translateY(0); }
.btn-ghost { background: var(--glass); border: 1px solid var(--glass-border); color: var(--text-primary); }
.btn-ghost:hover { background: var(--glass-hover); border-color: rgba(255,255,255,0.15); }
.btn-ghost:disabled { opacity: 0.35; cursor: not-allowed; pointer-events: none; }
.btn-success { background: linear-gradient(135deg, #16a34a, #22c55e); color: white; box-shadow: 0 4px 16px var(--success-glow); }
.btn-success:hover { transform: translateY(-2px); }
.btn-icon {
  padding: 9px 13px; background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm); color: var(--text-primary); font-size: 1rem;
  cursor: pointer; transition: all var(--transition); line-height: 1;
}
.btn-icon:hover { background: var(--glass-hover); border-color: var(--accent); color: var(--accent); }
.btn-icon:disabled { opacity: 0.3; cursor: not-allowed; pointer-events: none; }
.btn-icon.active { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }

/* =====================================================
   EXAM CONFIG VIEW
===================================================== */
.config-view { max-width: 720px; }
.config-card {
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 28px 28px; margin-bottom: 20px;
}
.config-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 18px; display: flex; align-items: center; gap: 8px; }

/* Session checkboxes */
.session-checks { display: flex; flex-direction: column; gap: 10px; }
.session-check-item {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border); background: var(--glass);
  cursor: pointer; transition: all var(--transition);
}
.session-check-item:hover { border-color: rgba(108,99,255,0.4); background: var(--glass-hover); }
.session-check-item.checked { border-color: var(--accent); background: var(--accent-glow); }
.session-check-item input[type=checkbox] { display: none; }
.check-box {
  width: 20px; height: 20px; border-radius: 5px;
  border: 2px solid var(--glass-border); flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.session-check-item.checked .check-box { background: var(--accent); border-color: var(--accent); }
.check-icon { display: none; }
.session-check-item.checked .check-icon { display: block; font-size: 0.75rem; color: white; }
.check-label { flex: 1; }
.check-label .cl-name { font-weight: 600; font-size: 0.9rem; }
.check-label .cl-meta { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }
.check-count { font-size: 0.78rem; font-weight: 700; color: var(--accent-light); background: rgba(108,99,255,0.12); border-radius: 999px; padding: 2px 10px; }

/* Number input row */
.config-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.config-label { flex: 1; }
.config-label .cl-name { font-weight: 600; font-size: 0.9rem; }
.config-label .cl-meta { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }
.num-stepper { display: flex; align-items: center; gap: 0; }
.num-stepper button {
  width: 36px; height: 36px; border: 1px solid var(--glass-border);
  background: var(--glass); color: var(--text-primary); font-size: 1.1rem;
  cursor: pointer; transition: all var(--transition); display: flex; align-items: center; justify-content: center;
}
.num-stepper button:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.num-stepper button:last-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.num-stepper button:hover { background: var(--glass-hover); border-color: var(--accent); color: var(--accent); }
.num-stepper .num-display {
  min-width: 52px; height: 36px;
  border-top: 1px solid var(--glass-border); border-bottom: 1px solid var(--glass-border);
  background: var(--bg-elevated); color: var(--text-primary);
  font-size: 0.95rem; font-weight: 700; text-align: center;
  display: flex; align-items: center; justify-content: center;
}

/* Preset buttons */
.preset-btns { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.preset-btn {
  padding: 6px 14px; border-radius: 999px; border: 1px solid var(--glass-border);
  background: var(--glass); color: var(--text-secondary); font-size: 0.8rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
}
.preset-btn:hover, .preset-btn.active { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }

/* Time per Q slider area */
.range-wrap { display: flex; align-items: center; gap: 12px; }
input[type=range] {
  flex: 1; height: 5px; accent-color: var(--accent);
  cursor: pointer; border-radius: 999px;
}
.range-val { font-size: 0.9rem; font-weight: 700; color: var(--accent-light); min-width: 60px; text-align: right; }

.config-summary {
  background: linear-gradient(135deg, rgba(108,99,255,0.1), rgba(167,139,250,0.05));
  border: 1px solid rgba(108,99,255,0.25); border-radius: var(--radius-md);
  padding: 16px 20px; margin-bottom: 24px; display: flex; gap: 24px; flex-wrap: wrap;
}
.config-summary .cs-item { display: flex; flex-direction: column; gap: 3px; }
.config-summary .cs-val { font-size: 1.1rem; font-weight: 800; color: var(--accent-light); }
.config-summary .cs-lbl { font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }

/* =====================================================
   FLASHCARD (LEARN) VIEW – Quizlet-style
===================================================== */
.fc-shell {
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: calc(100vh - 61px); /* subtract navbar */
  overflow: hidden;
}
.fc-top {
  padding: 20px 32px 0;
  display: flex; align-items: center; gap: 16px;
}
.fc-center {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 0 32px; gap: 24px; overflow: hidden;
}
.fc-bottom {
  padding: 16px 32px 24px;
  display: flex; flex-direction: column; align-items: center; gap: 14px;
}

/* Progress bar */
.fc-progress-bar-wrap { flex: 1; height: 5px; background: var(--glass-border); border-radius: 999px; overflow: hidden; }
.fc-progress-bar { height: 100%; background: linear-gradient(90deg, var(--accent), #a78bfa); border-radius: 999px; transition: width 0.5s ease; }
.fc-counter { font-size: 0.88rem; color: var(--text-secondary); font-weight: 600; white-space: nowrap; }

/* Controls top row */
.fc-toolbar { display: flex; align-items: center; gap: 8px; }

/* Stars/known indicator dots */
.fc-dot-row { display: flex; gap: 5px; max-width: 700px; width: 100%; flex-wrap: wrap; }
.fc-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--glass-border); transition: background 0.3s; flex-shrink: 0; }
.fc-dot.known { background: var(--success); }
.fc-dot.unknown { background: var(--danger); }
.fc-dot.current { background: var(--accent); transform: scale(1.4); }

/* Card flip */
.fc-card-scene { width: 100%; max-width: 720px; height: 320px; perspective: 1400px; cursor: pointer; }
.fc-card-inner {
  width: 100%; height: 100%; position: relative;
  transform-style: preserve-3d;
  transition: transform 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}
.fc-card-scene.flipped .fc-card-inner { transform: rotateY(180deg); }

/* Swipe slide animation */
.fc-card-scene.slide-out-left .fc-card-inner { animation: slideOutLeft 0.22s ease forwards; }
.fc-card-scene.slide-out-right .fc-card-inner { animation: slideOutRight 0.22s ease forwards; }
.fc-card-scene.slide-in-left .fc-card-inner { animation: slideInFromLeft 0.22s ease forwards; }
.fc-card-scene.slide-in-right .fc-card-inner { animation: slideInFromRight 0.22s ease forwards; }
@keyframes slideOutLeft { to { transform: translateX(-120%) rotateY(-15deg); opacity: 0; } }
@keyframes slideOutRight { to { transform: translateX(120%) rotateY(15deg); opacity: 0; } }
@keyframes slideInFromLeft { from { transform: translateX(80%) rotateY(10deg); opacity: 0; } to { transform: translateX(0) rotateY(0); opacity: 1; } }
@keyframes slideInFromRight { from { transform: translateX(-80%) rotateY(-10deg); opacity: 0; } to { transform: translateX(0) rotateY(0); opacity: 1; } }

.fc-card-front, .fc-card-back {
  position: absolute; width: 100%; height: 100%;
  backface-visibility: hidden;
  border-radius: var(--radius-xl);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 36px 44px; text-align: center;
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
  user-select: none;
}
.fc-card-front {
  background: linear-gradient(145deg, #1a1e2e, #11141e);
  border: 1px solid var(--glass-border);
}
.fc-card-back {
  background: linear-gradient(145deg, #0f2018, #0d1a11);
  border: 1px solid rgba(34,197,94,0.3);
  transform: rotateY(180deg);
}
.fc-label { font-size: 0.7rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--text-muted); margin-bottom: 18px; }
.fc-card-back .fc-label { color: rgba(34,197,94,0.5); }
.fc-question { font-size: 1.15rem; font-weight: 500; line-height: 1.75; color: var(--text-primary); }
.fc-answer { font-size: 1.1rem; font-weight: 700; color: var(--success); line-height: 1.6; }
.fc-hint { position: absolute; bottom: 18px; right: 22px; font-size: 0.72rem; color: var(--text-muted); }

/* Options row below card */
.fc-options-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 8px; width: 100%; max-width: 720px;
}
.fc-opt {
  padding: 10px 14px; background: var(--glass);
  border: 1px solid var(--glass-border); border-radius: var(--radius-sm);
  font-size: 0.82rem; color: var(--text-secondary); text-align: left;
  display: flex; align-items: flex-start; gap: 8px; cursor: default;
  transition: all 0.3s ease;
}
.fc-opt .ol { font-weight: 800; width: 18px; flex-shrink: 0; }
.fc-opt.correct { background: var(--success-glow); border-color: var(--success); color: #86efac; }
.fc-opt.wrong { background: var(--danger-glow); border-color: rgba(239,68,68,0.35); color: #fca5a5; }

/* Known row */
.fc-action-row { display: flex; align-items: center; gap: 14px; }
.fc-nav-btn {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--glass); border: 1px solid var(--glass-border);
  color: var(--text-primary); font-size: 1.2rem;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.fc-nav-btn:hover:not(:disabled) { background: var(--glass-hover); border-color: var(--accent); color: var(--accent); }
.fc-nav-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.fc-rating-btns { display: flex; gap: 10px; }
.fc-rating {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 22px; border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif; font-size: 0.9rem; font-weight: 700;
  cursor: pointer; border: 1.5px solid transparent;
  transition: all var(--transition); animation: fadeUp 0.25s ease;
}
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.fc-rating.still { background: rgba(239,68,68,0.12); border-color: rgba(239,68,68,0.35); color: #fca5a5; }
.fc-rating.still:hover { background: rgba(239,68,68,0.22); }
.fc-rating.got { background: rgba(34,197,94,0.12); border-color: rgba(34,197,94,0.35); color: #86efac; }
.fc-rating.got:hover { background: rgba(34,197,94,0.22); }

/* Keyboard hint */
.fc-keyboard-hint { font-size: 0.72rem; color: var(--text-muted); display: flex; align-items: center; gap: 8px; }
.kbd { background: var(--glass); border: 1px solid var(--glass-border); border-radius: 4px; padding: 2px 6px; font-size: 0.7rem; font-family: monospace; }

/* FC complete */
.fc-complete {
  display: flex; flex-direction: column; align-items: center; gap: 20px;
  padding: 60px 40px; max-width: 500px; margin: 0 auto; text-align: center;
}
.fc-complete .big-emoji { font-size: 4rem; }
.fc-complete h2 { font-size: 1.9rem; font-weight: 800; }
.fc-stats-row { display: flex; gap: 24px; }
.fc-stat { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.fc-stat .n { font-size: 1.8rem; font-weight: 800; }
.fc-stat .l { font-size: 0.78rem; color: var(--text-secondary); }
.fc-stat.g .n { color: var(--success); }
.fc-stat.r .n { color: var(--danger); }

/* =====================================================
   EXAM VIEW
===================================================== */
.exam-view {
  display: flex; flex-direction: column;
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: var(--bg-base); z-index: 200; overflow: hidden;
}

.exam-header {
  display: flex; align-items: center; gap: 18px;
  padding: 14px 28px;
  border-bottom: 1px solid var(--glass-border);
  background: rgba(13,15,23,0.95); backdrop-filter: blur(12px);
  flex-shrink: 0;
}
.exam-title { font-size: 0.95rem; font-weight: 700; white-space: nowrap; }
.exam-progress-wrap { flex: 1; height: 6px; background: var(--glass-border); border-radius: 999px; overflow: hidden; }
.exam-progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), #a78bfa); border-radius: 999px; transition: width 0.4s ease; }
.exam-answered-count { font-size: 0.78rem; color: var(--text-secondary); white-space: nowrap; }
.exam-timer {
  display: flex; align-items: center; gap: 5px;
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm); padding: 7px 13px;
  font-size: 0.88rem; font-weight: 700; font-variant-numeric: tabular-nums;
  min-width: 84px; justify-content: center;
}
.exam-timer.warning { border-color: var(--warning); color: var(--warning); }
.exam-timer.danger { border-color: var(--danger); color: var(--danger); animation: pulse 1s ease infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.5} }

/* Exam Body */
.exam-body { display: flex; flex: 1; overflow: hidden; }
.exam-question-panel { flex: 1; padding: 36px 48px; overflow-y: auto; display: flex; flex-direction: column; gap: 24px; }

.q-number { font-size: 0.75rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--accent-light); }
.q-text { font-size: 1.15rem; font-weight: 600; line-height: 1.75; color: var(--text-primary); }
.q-source-tag { font-size: 0.72rem; color: var(--text-muted); margin-top: -8px; }

.q-options { display: flex; flex-direction: column; gap: 10px; }
.q-option {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 14px 18px; background: var(--glass);
  border: 1.5px solid var(--glass-border); border-radius: var(--radius-md);
  cursor: pointer; transition: all var(--transition);
}
.q-option:hover:not(.selected):not(.disabled) { background: var(--glass-hover); border-color: rgba(108,99,255,0.4); }
.q-option.selected { background: rgba(108,99,255,0.12); border-color: var(--accent); }
.q-option.correct { background: var(--success-glow); border-color: var(--success); }
.q-option.incorrect { background: var(--danger-glow); border-color: var(--danger); }
.q-option.disabled { pointer-events: none; }
.option-letter {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--glass-border); display: flex; align-items: center; justify-content: center;
  font-size: 0.78rem; font-weight: 700; flex-shrink: 0; transition: all var(--transition);
}
.q-option.selected .option-letter { background: var(--accent); color: white; }
.q-option.correct .option-letter { background: var(--success); color: white; }
.q-option.incorrect .option-letter { background: var(--danger); color: white; }
.option-text { font-size: 0.93rem; line-height: 1.5; padding-top: 4px; }

.exam-nav-row { display: flex; gap: 10px; align-items: center; padding-bottom: 24px; margin-top: 4px; }

/* Sidebar */
.exam-sidebar {
  width: 230px; border-left: 1px solid var(--glass-border);
  padding: 22px 18px; overflow-y: auto;
  background: rgba(13,15,23,0.4); flex-shrink: 0;
}
.sidebar-title { font-size: 0.7rem; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text-muted); margin-bottom: 14px; }
.q-map { display: grid; grid-template-columns: repeat(5, 1fr); gap: 5px; }
.q-map-cell {
  aspect-ratio: 1; border-radius: 6px; border: 1px solid var(--glass-border);
  background: var(--glass); display: flex; align-items: center; justify-content: center;
  font-size: 0.68rem; font-weight: 600; cursor: pointer; transition: all var(--transition); color: var(--text-secondary);
}
.q-map-cell:hover { border-color: var(--accent); color: var(--accent); }
.q-map-cell.current { border-color: var(--accent); background: var(--accent-glow); color: var(--text-primary); }
.q-map-cell.answered { background: rgba(108,99,255,0.14); border-color: rgba(108,99,255,0.4); color: var(--text-primary); }
.q-map-cell.correct { background: var(--success-glow); border-color: var(--success); color: var(--success); }
.q-map-cell.incorrect { background: var(--danger-glow); border-color: rgba(239,68,68,0.4); color: #f87171; }

/* ── Modal ── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center;
  z-index: 300; animation: fadeIn 0.2s ease;
}
@keyframes fadeIn { from{opacity:0} to{opacity:1} }
.modal {
  background: var(--bg-elevated); border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl); padding: 36px 40px;
  max-width: 460px; width: 90%; box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s cubic-bezier(0.4,0,0.2,1);
}
@keyframes slideUp { from{transform:translateY(20px);opacity:0} to{transform:translateY(0);opacity:1} }
.modal h2 { font-size: 1.4rem; font-weight: 800; margin-bottom: 8px; }
.modal p { color: var(--text-secondary); margin-bottom: 22px; font-size: 0.92rem; line-height: 1.5; }
.modal-btns { display: flex; gap: 12px; justify-content: flex-end; }

/* ── Results ── */
.results-view { padding: 48px 40px; max-width: 900px; margin: 0 auto; }
.score-display {
  display: flex; align-items: center; gap: 40px; margin-bottom: 36px;
  background: var(--glass); border: 1px solid var(--glass-border); border-radius: var(--radius-xl); padding: 32px;
}
.score-circle {
  width: 110px; height: 110px; border-radius: 50%;
  border: 5px solid var(--accent); display: flex; flex-direction: column;
  align-items: center; justify-content: center; flex-shrink: 0; background: var(--accent-glow);
  position: relative;
}
.score-circle::after {
  content: '';
  position: absolute; inset: -8px; border-radius: 50%;
  border: 1px solid rgba(108,99,255,0.2);
}
.score-circle .score-num { font-size: 1.9rem; font-weight: 800; line-height: 1; }
.score-circle .score-total { font-size: 0.72rem; color: var(--text-secondary); }
.score-stats { display: flex; flex-direction: column; gap: 12px; flex: 1; }
.stat-row { display: flex; align-items: center; gap: 12px; }
.stat-dot { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
.stat-row .label { font-size: 0.88rem; color: var(--text-secondary); flex: 1; }
.stat-row .value { font-size: 1rem; font-weight: 700; }
.score-time { display: flex; align-items: center; gap: 8px; color: var(--text-secondary); font-size: 0.85rem; margin-top: 4px; }

.results-list { display: flex; flex-direction: column; gap: 14px; }
.result-item {
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius-md); padding: 18px 22px;
  border-left: 4px solid transparent;
}
.result-item.correct-result { border-left-color: var(--success); }
.result-item.incorrect-result { border-left-color: var(--danger); }
.result-item .ri-q { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 5px; }
.result-item .ri-text { font-size: 0.92rem; font-weight: 600; margin-bottom: 10px; line-height: 1.5; }
.result-item .ri-choices { display: flex; flex-direction: column; gap: 3px; }
.result-item .ri-choice { font-size: 0.8rem; color: var(--text-secondary); padding: 2px 0; }
.result-item .ri-choice.ri-selected { color: var(--danger); font-weight: 600; }
.result-item .ri-choice.ri-correct { color: var(--success); font-weight: 600; }

/* ── Tabs ── */
.tabs { display: flex; gap: 4px; background: var(--glass); border: 1px solid var(--glass-border); border-radius: var(--radius-md); padding: 4px; margin-bottom: 20px; width: fit-content; }
.tab-btn {
  padding: 8px 20px; border-radius: 10px; border: none;
  background: transparent; color: var(--text-secondary); font-family: 'Inter', sans-serif;
  font-size: 0.85rem; font-weight: 600; cursor: pointer; transition: all var(--transition);
}
.tab-btn.active { background: var(--accent); color: white; box-shadow: 0 2px 10px var(--accent-glow); }
.tab-btn:hover:not(.active) { color: var(--text-primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── Utilities ── */
.flex { display: flex; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.w-full { width: 100%; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }

/* =====================================================
   DISCLAIMER POPUP
===================================================== */
.disclaimer-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(16px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  animation: fadeIn 0.35s ease;
}
.disclaimer-box {
  background: linear-gradient(145deg, #13161f, #0d0f17);
  border: 1px solid rgba(108,99,255,0.3);
  border-radius: var(--radius-xl);
  width: 100%; max-width: 580px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.7), 0 0 0 1px rgba(255,255,255,0.04);
  animation: slideUp 0.4s cubic-bezier(0.4,0,0.2,1);
  overflow: hidden;
}
.disclaimer-header {
  background: linear-gradient(135deg, rgba(108,99,255,0.15), rgba(167,139,250,0.08));
  border-bottom: 1px solid rgba(108,99,255,0.2);
  padding: 28px 32px 24px;
  text-align: center;
}
.disclaimer-header .dh-icon { font-size: 2.6rem; margin-bottom: 12px; }
.disclaimer-header h2 {
  font-size: 1.35rem; font-weight: 800; margin-bottom: 6px;
  background: linear-gradient(135deg, #f0f2ff, #a78bfa);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.disclaimer-header p { font-size: 0.82rem; color: var(--text-muted); }
.disclaimer-body { padding: 24px 32px; display: flex; flex-direction: column; gap: 14px; }
.disclaimer-item {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 14px 16px; border-radius: var(--radius-md);
  background: var(--glass); border: 1px solid var(--glass-border);
}
.disclaimer-item .di-icon {
  font-size: 1.3rem; flex-shrink: 0; line-height: 1;
  margin-top: 1px;
}
.disclaimer-item .di-text { flex: 1; }
.disclaimer-item .di-title { font-size: 0.85rem; font-weight: 700; margin-bottom: 4px; color: var(--text-primary); }
.disclaimer-item .di-desc { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.55; }
.disclaimer-item .di-desc a { color: var(--accent-light); text-decoration: none; }
.disclaimer-item .di-desc a:hover { text-decoration: underline; }
.disclaimer-item.warning-item { border-color: rgba(245,158,11,0.25); background: rgba(245,158,11,0.06); }
.disclaimer-item.warning-item .di-title { color: #fbbf24; }
.disclaimer-footer { padding: 0 32px 28px; }
.disclaimer-agree {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 14px 16px; border-radius: var(--radius-md);
  background: rgba(108,99,255,0.08); border: 1.5px solid rgba(108,99,255,0.25);
  cursor: pointer; margin-bottom: 16px; transition: all var(--transition);
}
.disclaimer-agree:hover { border-color: var(--accent); background: rgba(108,99,255,0.12); }
.disclaimer-agree input[type=checkbox] { display: none; }
.agree-check {
  width: 20px; height: 20px; border-radius: 5px; flex-shrink: 0; margin-top: 1px;
  border: 2px solid rgba(108,99,255,0.5);
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition); background: transparent;
}
.disclaimer-agree.checked .agree-check { background: var(--accent); border-color: var(--accent); }
.agree-checkmark { display: none; font-size: 0.75rem; color: white; }
.disclaimer-agree.checked .agree-checkmark { display: block; }
.agree-label { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.55; user-select: none; }
.agree-label strong { color: var(--text-primary); }
#btn-enter-app {
  width: 100%; padding: 14px;
  background: linear-gradient(135deg, var(--accent), #8b85ff);
  color: white; border: none; border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif; font-size: 0.95rem; font-weight: 700;
  cursor: pointer; transition: all var(--transition);
  box-shadow: 0 4px 20px var(--accent-glow);
  opacity: 0.45; pointer-events: none;
}
#btn-enter-app.ready { opacity: 1; pointer-events: auto; }
#btn-enter-app.ready:hover { transform: translateY(-2px); box-shadow: 0 8px 28px var(--accent-glow); }

/* =====================================================
   FEEDBACK / REPORT BUTTON
===================================================== */
.feedback-fab {
  position: fixed; bottom: 24px; right: 24px; z-index: 150;
  display: flex; align-items: center; gap: 8px;
  padding: 10px 18px;
  background: rgba(19,22,31,0.92);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  color: var(--text-secondary); font-size: 0.8rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
}
.feedback-fab:hover {
  border-color: var(--warning); color: var(--warning);
  background: rgba(245,158,11,0.08);
  transform: translateY(-2px);
}

/* Feedback modal – wider than standard modal */
.feedback-modal {
  background: var(--bg-elevated); border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl); padding: 36px 40px;
  max-width: 520px; width: 95%; box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s cubic-bezier(0.4,0,0.2,1);
}
.feedback-modal h2 { font-size: 1.3rem; font-weight: 800; margin-bottom: 6px; }
.feedback-modal .subtitle { font-size: 0.82rem; color: var(--text-secondary); margin-bottom: 22px; line-height: 1.5; }

.feedback-q-preview {
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm); padding: 12px 16px;
  font-size: 0.82rem; color: var(--text-secondary); margin-bottom: 18px;
  line-height: 1.5; max-height: 80px; overflow: hidden;
  position: relative;
}
.feedback-q-preview::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 28px;
  background: linear-gradient(transparent, var(--bg-elevated));
}

.feedback-type-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 18px; }
.feedback-type-btn {
  padding: 10px 12px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--glass-border); background: var(--glass);
  color: var(--text-secondary); font-size: 0.8rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition); text-align: center;
  font-family: 'Inter', sans-serif;
}
.feedback-type-btn:hover { border-color: rgba(245,158,11,0.4); color: var(--warning); }
.feedback-type-btn.selected { border-color: var(--warning); color: var(--warning); background: rgba(245,158,11,0.1); }

.feedback-textarea {
  width: 100%; min-height: 90px; padding: 12px 14px;
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-family: 'Inter', sans-serif; font-size: 0.85rem; line-height: 1.55;
  resize: vertical; transition: border-color var(--transition);
  margin-bottom: 18px;
}
.feedback-textarea:focus { outline: none; border-color: rgba(245,158,11,0.5); }
.feedback-textarea::placeholder { color: var(--text-muted); }

.feedback-source {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.75rem; color: var(--text-muted);
  margin-bottom: 18px;
}
.feedback-source a { color: var(--accent-light); text-decoration: none; }
.feedback-source a:hover { text-decoration: underline; }

.feedback-success {
  display: flex; flex-direction: column; align-items: center;
  gap: 12px; text-align: center; padding: 16px 0 8px;
}
.feedback-success .fs-icon { font-size: 3rem; }
.feedback-success h3 { font-size: 1.1rem; font-weight: 800; }
.feedback-success p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.55; }

/* Footer attribution in home */
.site-footer {
  padding: 20px 40px; border-top: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center; gap: 16px;
  font-size: 0.75rem; color: var(--text-muted);
  flex-wrap: wrap; text-align: center;
}
.site-footer a { color: var(--text-muted); text-decoration: none; transition: color var(--transition); }
.site-footer a:hover { color: var(--accent-light); }
.site-footer .sep { opacity: 0.3; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .navbar { padding: 14px 18px; }
  .main-content { padding: 28px 18px; }
  .mode-grid { grid-template-columns: 1fr; }
  .exam-sidebar { display: none; }
  .exam-question-panel { padding: 20px 18px; }
  .score-display { flex-direction: column; align-items: flex-start; gap: 24px; }
  .fc-shell { height: calc(100vh - 53px); }
  .fc-card-scene { height: 260px; }
  .fc-center { padding: 0 16px; }
  .fc-top, .fc-bottom { padding-left: 16px; padding-right: 16px; }
  .page-title { font-size: 1.7rem; }
  .fc-options-grid { grid-template-columns: 1fr; }
  .config-view { max-width: 100%; }
  .disclaimer-body { padding: 20px; }
  .disclaimer-footer { padding: 0 20px 22px; }
  .disclaimer-header { padding: 22px 20px 18px; }
  .feedback-modal { padding: 28px 24px; }
  .feedback-fab { bottom: 16px; right: 16px; padding: 9px 14px; font-size: 0.75rem; }
}

/* =====================================================
   NAVBAR SETTINGS BUTTON
===================================================== */
.navbar-actions {
  display: flex; align-items: center; gap: 8px; flex-shrink: 0;
}

/* Font size controls */
.font-size-controls {
  display: flex; align-items: center;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.font-btn {
  padding: 7px 11px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem; font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1;
  letter-spacing: -0.5px;
}
.font-btn:hover:not(:disabled) {
  background: var(--glass-hover);
  color: var(--accent-light);
}
.font-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.font-size-display {
  padding: 0 8px;
  font-size: 0.72rem; font-weight: 600;
  color: var(--text-muted);
  border-left: 1px solid var(--glass-border);
  border-right: 1px solid var(--glass-border);
  white-space: nowrap;
  line-height: 30px;
  min-width: 38px; text-align: center;
}

.navbar-settings-btn {
  position: relative;
  padding: 8px 11px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition);
  display: flex; align-items: center; gap: 4px;
  line-height: 1;
  flex-shrink: 0;
}
.navbar-settings-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.ai-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--glass-border);
  display: inline-block;
}
.ai-dot.connected {
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
  animation: pulse-dot 2s ease infinite;
}
@keyframes pulse-dot { 0%,100%{opacity:1} 50%{opacity:0.5} }

/* =====================================================
   SETTINGS MODAL
===================================================== */
.settings-modal {
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  width: 95%; max-width: 500px;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s cubic-bezier(0.4,0,0.2,1);
  overflow: hidden;
}

.settings-header {
  background: linear-gradient(135deg, rgba(108,99,255,0.12), rgba(167,139,250,0.06));
  border-bottom: 1px solid var(--glass-border);
  padding: 28px 32px 20px;
  text-align: center;
}
.settings-icon { font-size: 2.2rem; margin-bottom: 10px; }
.settings-header h2 {
  font-size: 1.25rem; font-weight: 800; margin-bottom: 4px;
  background: linear-gradient(135deg, #f0f2ff, #a78bfa);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.settings-header p { font-size: 0.8rem; color: var(--text-muted); }

.settings-body { padding: 24px 32px; }

.settings-section { margin-bottom: 8px; }
.settings-section-title {
  font-size: 0.82rem; font-weight: 700;
  letter-spacing: 0.5px; color: var(--text-primary);
  margin-bottom: 8px;
}
.settings-section-desc {
  font-size: 0.78rem; color: var(--text-secondary);
  line-height: 1.55; margin-bottom: 14px;
}
.settings-section-desc a { color: var(--accent-light); text-decoration: none; }
.settings-section-desc a:hover { text-decoration: underline; }

.api-key-input-wrap {
  display: flex; align-items: center; gap: 0;
  border: 1.5px solid var(--glass-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition);
}
.api-key-input-wrap:focus-within { border-color: var(--accent); }

.api-key-input {
  flex: 1;
  padding: 11px 14px;
  background: var(--glass);
  border: none; outline: none;
  color: var(--text-primary);
  font-family: 'Inter', monospace;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
}
.api-key-input::placeholder { color: var(--text-muted); }

.btn-toggle-key {
  padding: 11px 13px;
  background: var(--bg-elevated);
  border: none; border-left: 1px solid var(--glass-border);
  color: var(--text-secondary);
  cursor: pointer; font-size: 0.95rem;
  transition: all var(--transition);
}
.btn-toggle-key:hover { background: var(--glass-hover); color: var(--text-primary); }

.api-key-status {
  margin-top: 8px;
  font-size: 0.75rem; font-weight: 600;
  padding: 6px 10px; border-radius: 6px;
  display: inline-flex; align-items: center; gap: 5px;
}
.api-key-status.connected { background: rgba(34,197,94,0.1); color: var(--success); border: 1px solid rgba(34,197,94,0.25); }
.api-key-status.empty { background: rgba(245,158,11,0.08); color: var(--warning); border: 1px solid rgba(245,158,11,0.2); }

.model-select {
  width: 100%;
  padding: 10px 14px;
  background: var(--glass);
  border: 1.5px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b90a7' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}
.model-select:focus { border-color: var(--accent); }
.model-select option { background: var(--bg-elevated); color: var(--text-primary); }

.settings-footer {
  padding: 0 32px 28px;
  display: flex; gap: 10px; justify-content: flex-end;
}

/* =====================================================
   TOAST NOTIFICATION
===================================================== */
.toast {
  position: fixed;
  bottom: 80px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 10px 22px;
  font-size: 0.85rem; font-weight: 600;
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
  z-index: 9999;
  pointer-events: none;
}
.toast.toast-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* =====================================================
   HISTORY – HOME PAGE
===================================================== */
.history-list {
  display: flex; flex-direction: column; gap: 8px;
}
.history-item {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px 18px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}
.history-item:hover { background: var(--glass-hover); border-color: rgba(108,99,255,0.3); }
.hist-left { flex: 1; }
.hist-subject { font-size: 0.88rem; font-weight: 600; color: var(--text-primary); }
.hist-date { font-size: 0.72rem; color: var(--text-muted); margin-top: 3px; }
.hist-score {
  font-size: 0.82rem; font-weight: 700;
  padding: 4px 12px; border-radius: 999px;
  white-space: nowrap;
}
.hist-score.success { background: rgba(34,197,94,0.12); color: var(--success); border: 1px solid rgba(34,197,94,0.25); }
.hist-score.warning { background: rgba(245,158,11,0.1); color: var(--warning); border: 1px solid rgba(245,158,11,0.2); }
.hist-score.danger { background: rgba(239,68,68,0.1); color: var(--danger); border: 1px solid rgba(239,68,68,0.2); }

/* =====================================================
   HISTORY MODAL (full list + review)
===================================================== */
.history-modal {
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  width: 95%; max-width: 600px;
  max-height: 82vh;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s cubic-bezier(0.4,0,0.2,1);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.history-modal-wide { max-width: 800px; }

.history-modal-header {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
  padding: 24px 28px 18px;
  border-bottom: 1px solid var(--glass-border);
  flex-shrink: 0;
}
.history-modal-header h2 { font-size: 1.15rem; font-weight: 800; }

.history-modal-body {
  flex: 1; overflow-y: auto;
  padding: 18px 28px;
  display: flex; flex-direction: column; gap: 12px;
}
.history-modal-body .results-list { display: flex; flex-direction: column; gap: 14px; }

.history-modal-footer {
  padding: 16px 28px;
  border-top: 1px solid var(--glass-border);
  display: flex; gap: 10px; justify-content: flex-end;
  flex-shrink: 0;
}

/* Full history list items */
.history-full-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  transition: all var(--transition);
}
.history-full-item:hover { border-color: rgba(108,99,255,0.3); }
.hfi-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.hfi-subject { font-size: 0.9rem; font-weight: 700; }
.hfi-meta { font-size: 0.72rem; color: var(--text-muted); margin-top: 3px; }
.hfi-score {
  font-size: 0.82rem; font-weight: 700;
  padding: 4px 12px; border-radius: 999px; white-space: nowrap; flex-shrink: 0;
}
.hfi-score.success { background: rgba(34,197,94,0.12); color: var(--success); border: 1px solid rgba(34,197,94,0.25); }
.hfi-score.warning { background: rgba(245,158,11,0.1); color: var(--warning); border: 1px solid rgba(245,158,11,0.2); }
.hfi-score.danger { background: rgba(239,68,68,0.1); color: var(--danger); border: 1px solid rgba(239,68,68,0.2); }
.hfi-bottom { display: flex; align-items: center; justify-content: space-between; gap: 10px; font-size: 0.78rem; color: var(--text-muted); }

.btn-review-hist {
  padding: 5px 12px;
  background: var(--accent-glow);
  border: 1px solid rgba(108,99,255,0.3);
  border-radius: var(--radius-sm);
  color: var(--accent-light);
  font-size: 0.75rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
  font-family: 'Inter', sans-serif;
}
.btn-review-hist:hover { background: rgba(108,99,255,0.2); border-color: var(--accent); }

/* =====================================================
   AI EXPLAIN BOX
===================================================== */
.btn-ai-explain {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 12px;
  padding: 7px 16px;
  background: linear-gradient(135deg, rgba(108,99,255,0.12), rgba(167,139,250,0.06));
  border: 1px solid rgba(108,99,255,0.3);
  border-radius: var(--radius-sm);
  color: var(--accent-light);
  font-size: 0.78rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
  font-family: 'Inter', sans-serif;
}
.btn-ai-explain:hover:not(:disabled) {
  background: rgba(108,99,255,0.2);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--accent-glow);
}
.btn-ai-explain:disabled { opacity: 0.6; cursor: not-allowed; }

.ai-explain-box {
  margin-top: 12px;
  border-radius: var(--radius-md);
  overflow: hidden;
  animation: fadeIn 0.3s ease;
}

.ai-explain-header {
  padding: 10px 16px;
  background: linear-gradient(135deg, rgba(108,99,255,0.15), rgba(167,139,250,0.08));
  border: 1px solid rgba(108,99,255,0.25);
  border-bottom: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  font-size: 0.75rem; font-weight: 700;
  color: var(--accent-light);
  letter-spacing: 0.5px;
}

.ai-explain-content {
  padding: 14px 16px;
  background: rgba(108,99,255,0.05);
  border: 1px solid rgba(108,99,255,0.15);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-size: 0.83rem; color: var(--text-secondary);
  line-height: 1.7;
}
.ai-explain-content strong { color: var(--text-primary); }

.ai-explain-error {
  padding: 12px 16px;
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.25);
  border-radius: var(--radius-md);
  font-size: 0.8rem; color: #fca5a5;
}

/* AI Loading dots */
.ai-loading-dots {
  display: inline-flex; align-items: center; gap: 3px;
}
.ai-loading-dots span {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent-light);
  animation: dot-bounce 1.2s ease infinite;
}
.ai-loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.ai-loading-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes dot-bounce {
  0%,80%,100% { transform: translateY(0); opacity: 0.5; }
  40% { transform: translateY(-5px); opacity: 1; }
}