/* ======================================================
   A+ Adaptive Study System — styles.css
   Data-attribute driven theming. No build step required.
   ====================================================== */

/* ---- Google Fonts (loaded conditionally by JS) ---- */
@import url('https://fonts.googleapis.com/css2?family=Atkinson+Hyperlegible:ital,wght@0,400;0,700;1,400&family=Lexend:wght@300;400;500;600&display=swap');

/* ============== CSS CUSTOM PROPERTIES — LIGHT ============== */
:root {
  /* Core palette */
  --clr-bg: #f5f7fa;
  --clr-surface: #ffffff;
  --clr-surface-2: #eef1f6;
  --clr-border: #d1d9e0;
  --clr-text: #1a2332;
  --clr-text-muted: #5a6a7a;
  --clr-primary: #1e5fb0;
  --clr-primary-fg: #ffffff;
  --clr-primary-hover: #174d96;
  --clr-accent: #0d9461;
  --clr-accent-fg: #ffffff;
  --clr-danger: #c0392b;
  --clr-danger-fg: #ffffff;
  --clr-warning: #d97706;
  --clr-warning-fg: #ffffff;

  /* Rating colors */
  --clr-rate-1: #c0392b;
  --clr-rate-2: #d97706;
  --clr-rate-3: #0d9461;
  --clr-rate-4: #1e5fb0;

  /* Layout */
  --top-bar-h: 52px;
  --bottom-bar-h: 60px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);

  /* Typography */
  --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-atkinson: 'Atkinson Hyperlegible', var(--font-system);
  --font-lexend: 'Lexend', var(--font-system);
  --font-body: var(--font-system);
  --font-size-base: 16px;

  /* Spacing / radius */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --gap: 16px;

  /* Shadows */
  --shadow-card: 0 2px 8px rgba(0,0,0,.10);
  --shadow-dialog: 0 8px 40px rgba(0,0,0,.18);

  /* Focus ring */
  --focus-ring: 0 0 0 3px rgba(30, 95, 176, 0.45);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition: 250ms ease;
}

/* ============== DARK THEME ============== */
[data-theme="dark"],
[data-theme="system"] {
  --clr-bg: #111827;
  --clr-surface: #1e2a3a;
  --clr-surface-2: #253347;
  --clr-border: #334155;
  --clr-text: #e8edf3;
  --clr-text-muted: #8a9bb0;
  --clr-primary: #4d9de0;
  --clr-primary-fg: #0d1f33;
  --clr-primary-hover: #3a8cd4;
  --clr-accent: #34d399;
  --clr-accent-fg: #0d1f33;
  --clr-danger: #f87171;
  --clr-danger-fg: #1a0000;
  --clr-warning: #fbbf24;
  --clr-warning-fg: #1a0f00;
  --clr-rate-1: #f87171;
  --clr-rate-2: #fbbf24;
  --clr-rate-3: #34d399;
  --clr-rate-4: #60a5fa;
  --shadow-card: 0 2px 12px rgba(0,0,0,.35);
  --shadow-dialog: 0 12px 60px rgba(0,0,0,.6);
  --focus-ring: 0 0 0 3px rgba(77, 157, 224, 0.5);
}

/* System preference overrides data-theme="system" */
@media (prefers-color-scheme: light) {
  [data-theme="system"] {
    --clr-bg: #f5f7fa;
    --clr-surface: #ffffff;
    --clr-surface-2: #eef1f6;
    --clr-border: #d1d9e0;
    --clr-text: #1a2332;
    --clr-text-muted: #5a6a7a;
    --clr-primary: #1e5fb0;
    --clr-primary-fg: #ffffff;
    --clr-primary-hover: #174d96;
    --clr-accent: #0d9461;
    --clr-accent-fg: #ffffff;
    --clr-danger: #c0392b;
    --clr-danger-fg: #ffffff;
    --clr-warning: #d97706;
    --clr-warning-fg: #ffffff;
    --clr-rate-1: #c0392b;
    --clr-rate-2: #d97706;
    --clr-rate-3: #0d9461;
    --clr-rate-4: #1e5fb0;
    --shadow-card: 0 2px 8px rgba(0,0,0,.10);
    --shadow-dialog: 0 8px 40px rgba(0,0,0,.18);
    --focus-ring: 0 0 0 3px rgba(30, 95, 176, 0.45);
  }
}

/* ============== HIGH CONTRAST ============== */
[data-contrast="high"] {
  --clr-bg: #000000;
  --clr-surface: #0a0a0a;
  --clr-surface-2: #141414;
  --clr-border: #ffffff;
  --clr-text: #ffffff;
  --clr-text-muted: #dddddd;
  --clr-primary: #ffff00;
  --clr-primary-fg: #000000;
  --clr-primary-hover: #e0e000;
  --clr-accent: #00ff88;
  --clr-accent-fg: #000000;
  --clr-danger: #ff4444;
  --clr-danger-fg: #000000;
  --clr-warning: #ffaa00;
  --clr-warning-fg: #000000;
  --clr-rate-1: #ff4444;
  --clr-rate-2: #ffaa00;
  --clr-rate-3: #00ff88;
  --clr-rate-4: #00aaff;
  --focus-ring: 0 0 0 4px #ffff00;
}

/* ============== FONT SWITCHING ============== */
[data-font="atkinson"] { --font-body: var(--font-atkinson); }
[data-font="lexend"]   { --font-body: var(--font-lexend); }

/* ============== FONT SIZE (zoom on body) ============== */
[data-font-size="small"]  body { zoom: 0.875; }
[data-font-size="large"]  body { zoom: 1.15; }
[data-font-size="xlarge"] body { zoom: 1.30; }

/* ============== REDUCED MOTION ============== */
[data-motion="reduced"] *,
[data-motion="reduced"] *::before,
[data-motion="reduced"] *::after {
  animation-duration: 0.01ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.01ms !important;
  scroll-behavior: auto !important;
}

/* ============== RESET / BASE ============== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  height: 100%;
  font-size: var(--font-size-base);
}

body {
  font-family: var(--font-body);
  background: var(--clr-bg);
  color: var(--clr-text);
  min-height: 100%;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  padding-top: calc(var(--top-bar-h) + var(--safe-top));
  padding-bottom: calc(var(--bottom-bar-h) + var(--safe-bottom));
}

/* Form controls inherit font */
input, select, textarea, button { font-family: inherit; }

/* ============== ACCESSIBILITY ============== */
.skip-link {
  position: absolute;
  top: -999px;
  left: 0;
  background: var(--clr-primary);
  color: var(--clr-primary-fg);
  padding: 10px 18px;
  border-radius: 0 0 var(--radius) 0;
  z-index: 9999;
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: 0; }

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
:focus:not(:focus-visible) { outline: none; }

/* ============== TOP BAR ============== */
#top-bar {
  position: fixed;
  top: var(--safe-top);
  left: 0;
  right: 0;
  height: var(--top-bar-h);
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gap);
  z-index: 100;
  gap: var(--gap);
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.app-title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--clr-primary);
  letter-spacing: -.01em;
  white-space: nowrap;
}

.countdown {
  font-size: 0.78rem;
  color: var(--clr-text-muted);
  background: var(--clr-surface-2);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  white-space: nowrap;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

/* ============== ICON BUTTON ============== */
.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--clr-text-muted);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.icon-btn:hover { background: var(--clr-surface-2); color: var(--clr-text); }
.icon-btn:active { background: var(--clr-border); }
.icon-btn[aria-pressed="true"] { color: var(--clr-primary); background: var(--clr-surface-2); }

/* ============== BOTTOM TAB BAR ============== */
#bottom-tabs {
  position: fixed;
  bottom: var(--safe-bottom);
  left: 0;
  right: 0;
  height: var(--bottom-bar-h);
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  display: flex;
  z-index: 100;
}

.tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  border: none;
  background: transparent;
  color: var(--clr-text-muted);
  cursor: pointer;
  font-size: 0.68rem;
  font-weight: 500;
  padding: 6px 0;
  transition: color var(--transition-fast), background var(--transition-fast);
  position: relative;
}
.tab-btn:hover { background: var(--clr-surface-2); }
.tab-btn[aria-selected="true"] { color: var(--clr-primary); }
.tab-btn[aria-selected="true"]::after {
  content: '';
  position: absolute;
  top: 0;
  left: 20%;
  right: 20%;
  height: 2px;
  border-radius: 0 0 2px 2px;
  background: var(--clr-primary);
}

/* ============== MAIN CONTENT ============== */
#main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  outline: none;
}

#view-container {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* ============== BUTTONS ============== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
  min-height: 44px; /* WCAG touch target */
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--clr-primary);
  color: var(--clr-primary-fg);
}
.btn-primary:hover { background: var(--clr-primary-hover); }

.btn-secondary {
  background: var(--clr-surface-2);
  color: var(--clr-text);
  border: 1px solid var(--clr-border);
}
.btn-secondary:hover { background: var(--clr-border); }

.btn-danger {
  background: var(--clr-danger);
  color: var(--clr-danger-fg);
}

.btn-full { width: 100%; }

/* ============== WELCOME DIALOG ============== */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: var(--gap);
  backdrop-filter: blur(4px);
  animation: overlay-in var(--transition) ease;
}
@keyframes overlay-in { from { opacity: 0; } to { opacity: 1; } }

.dialog-box {
  background: var(--clr-surface);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius) var(--radius);
  padding: 24px;
  width: 100%;
  max-width: 480px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-dialog);
  animation: slide-up var(--transition) ease;
}
@keyframes slide-up { from { transform: translateY(24px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.welcome-header { margin-bottom: 20px; }
.welcome-title { font-size: 1.5rem; font-weight: 700; color: var(--clr-primary); margin-bottom: 4px; }
.welcome-subtitle { font-size: 0.9rem; color: var(--clr-text-muted); }

.welcome-tasks {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.task-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  text-align: left;
  min-height: 56px;
}
.task-card:hover { border-color: var(--clr-primary); background: var(--clr-surface); }
.task-card-icon { font-size: 1.4rem; flex-shrink: 0; }
.task-card-label { font-weight: 600; font-size: 0.92rem; }
.task-card-sub { font-size: 0.8rem; color: var(--clr-text-muted); margin-top: 2px; }

.welcome-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.87rem;
  color: var(--clr-text-muted);
  cursor: pointer;
}
.checkbox-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--clr-primary);
}

/* ============== STUDY VIEW ============== */
.study-view {
  display: flex;
  flex-direction: column;
  padding: var(--gap);
  gap: var(--gap);
  flex: 1;
}

.session-hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--clr-text-muted);
  gap: 8px;
}

.hud-progress-bar {
  flex: 1;
  height: 6px;
  background: var(--clr-surface-2);
  border-radius: 999px;
  overflow: hidden;
  position: relative;
}
.hud-progress-bar-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background: var(--clr-primary);
  border-radius: 999px;
  transition: width 0.3s ease;
}

/* Anxiety mode: hide numbers and time */
[data-anxiety="true"] .hud-count,
[data-anxiety="true"] .hud-time,
[data-anxiety="true"] .hud-streak { display: none; }

/* Energy mode badge */
.energy-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.energy-red   { background: rgba(192,57,43,.15); color: var(--clr-danger); }
.energy-yellow{ background: rgba(217,119,6,.15); color: var(--clr-warning); }
.energy-blue  { background: rgba(30,95,176,.15); color: var(--clr-primary); }

/* ============== CARD ============== */
.card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  flex: 1;
  min-height: 200px;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.card-obj-tag {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  background: var(--clr-surface-2);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.card-qtype-tag {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: .04em;
}
.card-qtype-mc { background: rgba(30,95,176,.12); color: var(--clr-primary); }
.card-qtype-ma { background: rgba(13,148,97,.12); color: var(--clr-accent); }

.card-question {
  font-size: 1.1rem;
  font-weight: 500;
  line-height: 1.55;
  color: var(--clr-text);
}

/* ============== OPTIONS LIST ============== */
.options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
}

.option-btn {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  text-align: left;
  padding: 12px 16px;
  background: var(--clr-surface-2);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.92rem;
  line-height: 1.4;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  min-height: 48px; /* WCAG touch target */
}
.option-btn:hover:not(:disabled) { border-color: var(--clr-primary); background: var(--clr-surface); }
.option-btn:disabled { cursor: default; }

.option-letter {
  font-weight: 700;
  color: var(--clr-text-muted);
  min-width: 22px;
  font-size: 0.85rem;
  margin-top: 1px;
  flex-shrink: 0;
}

/* Option states after reveal */
.option-btn[data-state="correct"]  { border-color: var(--clr-accent); background: rgba(13,148,97,.12); }
.option-btn[data-state="wrong"]    { border-color: var(--clr-danger); background: rgba(192,57,43,.10); }
.option-btn[data-state="correct"] .option-letter { color: var(--clr-accent); }
.option-btn[data-state="wrong"]   .option-letter { color: var(--clr-danger); }

/* Status labels (color + text) */
.option-btn[data-state="correct"]::after { content: ' ✓'; color: var(--clr-accent); font-weight: 700; }
.option-btn[data-state="wrong"]::after   { content: ' ✗'; color: var(--clr-danger); font-weight: 700; }

/* MA checkbox area */
.option-btn.ma-selected {
  border-color: var(--clr-primary);
  background: rgba(30,95,176,.10);
}

/* Pointer-events lock on just-revealed card (Layer 1 safety) */
.card-just-revealed { pointer-events: none; }

/* ============== REVEAL BUTTON ============== */
.reveal-btn {
  background: var(--clr-primary);
  color: var(--clr-primary-fg);
  border: none;
  border-radius: var(--radius);
  padding: 14px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  min-height: 52px;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.reveal-btn:hover { background: var(--clr-primary-hover); }
.reveal-btn:active { transform: scale(0.98); }

/* ============== EXPLANATION ============== */
.explanation {
  background: var(--clr-surface-2);
  border-left: 4px solid var(--clr-accent);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--clr-text);
}
.explanation-label {
  font-weight: 700;
  color: var(--clr-accent);
  margin-bottom: 6px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* ============== RATE ROW (Layer 4 sticky bottom) ============== */
.rate-row {
  position: sticky;
  bottom: 0;
  display: flex;
  gap: 8px;
  padding: 12px 0;
  background: var(--clr-bg);
  border-top: 1px solid var(--clr-border);
  margin: 0 calc(-1 * var(--gap));
  padding-left: var(--gap);
  padding-right: var(--gap);
}

.rate-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  border: none;
  border-radius: var(--radius);
  padding: 8px 4px;
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 600;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  min-height: 52px;
}
.rate-btn:active { transform: scale(0.93); }
.rate-btn:hover { opacity: 0.85; }
.rate-btn .rate-num {
  font-size: 1.1rem;
  font-weight: 800;
  line-height: 1;
}

.rate-btn-1 { background: rgba(192,57,43,.15); color: var(--clr-rate-1); }
.rate-btn-2 { background: rgba(217,119,6,.15); color: var(--clr-rate-2); }
.rate-btn-3 { background: rgba(13,148,97,.15); color: var(--clr-rate-3); }
.rate-btn-4 { background: rgba(30,95,176,.15); color: var(--clr-rate-4); }

[data-contrast="high"] .rate-btn-1 { background: rgba(255,68,68,.25); }
[data-contrast="high"] .rate-btn-2 { background: rgba(255,170,0,.25); }
[data-contrast="high"] .rate-btn-3 { background: rgba(0,255,136,.25); }
[data-contrast="high"] .rate-btn-4 { background: rgba(0,170,255,.25); }

/* ============== NAV ROW ============== */
.nav-row {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text-muted);
  font-size: 0.87rem;
  cursor: pointer;
  min-height: 44px;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.nav-btn:hover:not(:disabled) { background: var(--clr-border); color: var(--clr-text); }
.nav-btn:disabled { opacity: 0.35; cursor: default; }

/* ============== SESSION COMPLETE ============== */
.session-complete {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 40px var(--gap);
  text-align: center;
  flex: 1;
}
.session-complete-icon { font-size: 3.5rem; }
.session-complete h2 { font-size: 1.4rem; font-weight: 700; }
.session-complete p { color: var(--clr-text-muted); font-size: 0.9rem; }
.session-stats {
  display: flex;
  gap: var(--gap);
  flex-wrap: wrap;
  justify-content: center;
}
.session-stat {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 12px 20px;
  min-width: 90px;
}
.session-stat-val { font-size: 1.6rem; font-weight: 800; color: var(--clr-primary); }
.session-stat-lbl { font-size: 0.78rem; color: var(--clr-text-muted); margin-top: 2px; }

/* ============== EMPTY STATE ============== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 48px var(--gap);
  text-align: center;
  color: var(--clr-text-muted);
  flex: 1;
}
.empty-state-icon { font-size: 3rem; opacity: .6; }
.empty-state h3 { font-size: 1.1rem; font-weight: 600; color: var(--clr-text); }

/* ============== SESSION START (energy picker) ============== */
.session-start {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  padding: var(--gap);
}
.session-start h2 { font-size: 1.2rem; font-weight: 700; }
.session-start p { font-size: 0.88rem; color: var(--clr-text-muted); }

.energy-cards {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.energy-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  background: var(--clr-surface);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 60px;
}
.energy-card:hover { border-color: var(--clr-primary); box-shadow: var(--shadow-card); }
.energy-card.selected { border-color: var(--clr-primary); background: var(--clr-surface-2); }
.energy-icon { font-size: 1.6rem; flex-shrink: 0; }
.energy-label { font-weight: 700; font-size: 0.95rem; }
.energy-desc { font-size: 0.82rem; color: var(--clr-text-muted); margin-top: 2px; }

.exam-selector {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.exam-btn {
  flex: 1;
  min-width: 100px;
  padding: 10px 16px;
  background: var(--clr-surface-2);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.87rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px;
}
.exam-btn.selected { border-color: var(--clr-primary); color: var(--clr-primary); }
.exam-btn:hover:not(.selected) { border-color: var(--clr-text-muted); }

/* ============== STATS VIEW ============== */
.stats-view {
  padding: var(--gap);
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

.stats-summary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.stat-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow-card);
}
.stat-card-val { font-size: 1.7rem; font-weight: 800; color: var(--clr-primary); }
.stat-card-lbl { font-size: 0.78rem; color: var(--clr-text-muted); margin-top: 4px; }

.section-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--clr-text-muted);
  margin-bottom: 8px;
}

.domain-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.domain-row {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 12px 14px;
  box-shadow: var(--shadow-card);
}
.domain-row-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.domain-name { font-weight: 600; font-size: 0.9rem; }
.domain-pct  { font-size: 0.85rem; font-weight: 700; color: var(--clr-primary); }
.domain-bar-track {
  height: 8px;
  background: var(--clr-surface-2);
  border-radius: 999px;
  overflow: hidden;
}
.domain-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--clr-primary);
  transition: width 0.5s ease;
}
.domain-bar-fill.poor  { background: var(--clr-danger); }
.domain-bar-fill.fair  { background: var(--clr-warning); }
.domain-bar-fill.good  { background: var(--clr-accent); }
.domain-sub  { font-size: 0.78rem; color: var(--clr-text-muted); margin-top: 6px; }

/* ============== REVIEW VIEW ============== */
.review-view {
  padding: var(--gap);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.review-item {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow-card);
}
.review-item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 6px;
}
.review-item-q { font-size: 0.88rem; line-height: 1.45; font-weight: 500; flex: 1; }
.review-rating-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}
.r1 { background: rgba(192,57,43,.15); color: var(--clr-rate-1); }
.r2 { background: rgba(217,119,6,.15);  color: var(--clr-rate-2); }
.r3 { background: rgba(13,148,97,.15);  color: var(--clr-rate-3); }
.r4 { background: rgba(30,95,176,.15);  color: var(--clr-rate-4); }
.review-item-answer { font-size: 0.82rem; color: var(--clr-accent); font-weight: 600; }
.review-item-obj { font-size: 0.75rem; color: var(--clr-text-muted); margin-top: 4px; }

/* ============== EXAM INFO VIEW ============== */
.examinfo-view {
  padding: var(--gap);
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}
.exam-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-card);
}
.exam-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; color: var(--clr-primary); }
.obj-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.obj-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 0.85rem;
}
.obj-id { font-weight: 700; color: var(--clr-primary); min-width: 32px; }
.obj-name { color: var(--clr-text-muted); line-height: 1.4; }

/* ============== SETTINGS PANEL ============== */
.panel-box {
  background: var(--clr-surface);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: 0;
  width: 100%;
  max-width: 520px;
  max-height: 88vh;
  overflow-y: auto;
  box-shadow: var(--shadow-dialog);
  animation: slide-up var(--transition) ease;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--clr-border);
  position: sticky;
  top: 0;
  background: var(--clr-surface);
  z-index: 1;
}
.panel-header h2 { font-size: 1.1rem; font-weight: 700; }

.panel-body { padding: 20px 24px; display: flex; flex-direction: column; gap: 20px; }

.settings-section { display: flex; flex-direction: column; gap: 10px; }
.settings-section-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--clr-text-muted);
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.settings-label { font-size: 0.9rem; font-weight: 500; }
.settings-desc { font-size: 0.78rem; color: var(--clr-text-muted); margin-top: 1px; }

.toggle-group {
  display: flex;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.toggle-item {
  flex: 1;
  padding: 7px 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 0.83rem;
  font-weight: 500;
  transition: background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}
.toggle-item.active {
  background: var(--clr-primary);
  color: var(--clr-primary-fg);
}
.toggle-item:not(.active) { color: var(--clr-text-muted); }
.toggle-item:not(.active):hover { background: var(--clr-surface-2); }

.switch {
  position: relative;
  width: 44px;
  height: 26px;
  flex-shrink: 0;
}
.switch input { opacity: 0; width: 0; height: 0; position: absolute; }
.switch-track {
  position: absolute;
  inset: 0;
  background: var(--clr-border);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--transition-fast);
}
.switch input:checked + .switch-track { background: var(--clr-primary); }
.switch-track::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: white;
  transition: transform var(--transition-fast);
}
.switch input:checked + .switch-track::after { transform: translateX(18px); }

.settings-date-input {
  padding: 7px 10px;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  background: var(--clr-surface-2);
  color: var(--clr-text);
  font-size: 0.87rem;
  font-family: inherit;
  min-height: 38px;
}

.settings-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ============== TOASTS ============== */
#toast-host {
  position: fixed;
  bottom: calc(var(--bottom-bar-h) + var(--safe-bottom) + 12px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 500;
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
  pointer-events: none;
  width: min(400px, calc(100vw - 32px));
}
.toast {
  padding: 12px 18px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: var(--shadow-dialog);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--transition), transform var(--transition);
  pointer-events: auto;
  max-width: 100%;
  text-align: center;
}
.toast-visible { opacity: 1; transform: translateY(0); }
.toast-info    { background: var(--clr-surface); color: var(--clr-text); border: 1px solid var(--clr-border); }
.toast-success { background: var(--clr-accent); color: var(--clr-accent-fg); }
.toast-error   { background: var(--clr-danger); color: var(--clr-danger-fg); }
.toast-warning { background: var(--clr-warning); color: var(--clr-warning-fg); }

/* ============== SHORTCUTS HELP ============== */
.shortcut-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.shortcut-table th {
  text-align: left;
  color: var(--clr-text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: 6px 8px;
  border-bottom: 1px solid var(--clr-border);
}
.shortcut-table td { padding: 8px; }
.shortcut-table tr:nth-child(even) td { background: var(--clr-surface-2); }
kbd {
  display: inline-block;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  padding: 2px 7px;
  font-family: inherit;
  font-size: 0.85em;
  font-weight: 600;
  box-shadow: 0 1px 0 var(--clr-border);
}

/* ============== FOCUS MODE ============== */
body.focus-mode #top-bar .app-title,
body.focus-mode #top-bar .countdown { opacity: 0.3; }
body.focus-mode #bottom-tabs { opacity: 0; pointer-events: none; }

/* ============== IS-TOUCH UTILITY ============== */
.is-touch .option-btn { min-height: 56px; }
.is-touch .rate-btn   { min-height: 60px; }
.is-touch .task-card  { min-height: 64px; }
.is-touch .nav-btn    { min-height: 52px; }

/* ============== SCROLLBAR STYLING ============== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--clr-border); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: var(--clr-text-muted); }

/* ============== RESPONSIVE ============== */
@media (min-width: 480px) {
  .stats-summary { grid-template-columns: repeat(4, 1fr); }
  .energy-cards { flex-direction: row; }
  .energy-card  { flex: 1; }
}

@media (min-width: 640px) {
  .dialog-box   { border-radius: var(--radius-lg); }
  .panel-box    { border-radius: var(--radius-lg); max-height: 80vh; }
  .overlay      { align-items: center; }
}

@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============== PBQ SIMULATOR ============== */
.card-qtype-pbq { background: rgba(139,92,246,.12); color: #7c3aed; }
[data-theme="dark"] .card-qtype-pbq,
[data-theme="system"] .card-qtype-pbq { color: #a78bfa; background: rgba(139,92,246,.2); }

.pbq-instruction {
  font-size: 0.82rem;
  color: var(--clr-text-muted);
  margin-bottom: 4px;
  font-style: italic;
}

/* --- Match subtype --- */
.pbq-match { display: flex; flex-direction: column; gap: 12px; }

.pbq-match-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  align-items: start;
}

.pbq-match-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.pbq-label-btn,
.pbq-match-btn {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: 4px;
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border: 2px solid var(--clr-border);
  border-radius: var(--radius);
  background: var(--clr-surface-2);
  cursor: pointer;
  font-size: 0.83rem;
  line-height: 1.35;
  font-weight: 500;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  min-height: 44px;
}
.pbq-label-btn:hover:not(:disabled),
.pbq-match-btn:hover:not(:disabled) {
  border-color: var(--clr-primary);
  background: var(--clr-surface);
}
.pbq-label-btn:disabled,
.pbq-match-btn:disabled { cursor: default; }

.pbq-label-btn.selected {
  border-color: var(--clr-primary);
  background: rgba(30,95,176,.12);
  box-shadow: 0 0 0 2px rgba(30,95,176,.25);
}
.pbq-match-btn.paired {
  border-color: var(--clr-accent);
  background: rgba(13,148,97,.08);
}

.pbq-label-btn.correct { border-color: var(--clr-accent); background: rgba(13,148,97,.12); }
.pbq-label-btn.wrong   { border-color: var(--clr-danger); background: rgba(192,57,43,.10); }
.pbq-match-btn.correct { border-color: var(--clr-accent); background: rgba(13,148,97,.12); }
.pbq-match-btn.wrong   { border-color: var(--clr-danger); background: rgba(192,57,43,.10); }

.pbq-label-text { font-weight: 600; }

.pbq-paired-indicator {
  font-size: 0.73rem;
  color: var(--clr-accent);
  font-weight: 600;
  margin-top: 2px;
  display: block;
}

/* --- Check button --- */
.pbq-check-btn {
  align-self: stretch;
  width: 100%;
  margin-top: 4px;
}

/* --- Order subtype --- */
.pbq-order { display: flex; flex-direction: column; gap: 6px; }

.pbq-order-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--clr-surface-2);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius);
  cursor: grab;
  transition: border-color var(--transition-fast), background var(--transition-fast), opacity var(--transition-fast);
  min-height: 52px;
}
.pbq-order-item[draggable="false"] { cursor: default; }
.pbq-order-item.drag-over { border-color: var(--clr-primary); background: var(--clr-surface); }
.pbq-order-item.dragging  { opacity: 0.4; }
.pbq-order-item.correct   { border-color: var(--clr-accent); background: rgba(13,148,97,.12); }
.pbq-order-item.wrong     { border-color: var(--clr-danger); background: rgba(192,57,43,.10); }

.pbq-order-num {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--clr-text-muted);
  min-width: 22px;
  text-align: center;
  flex-shrink: 0;
}
.pbq-order-item.correct .pbq-order-num { color: var(--clr-accent); }
.pbq-order-item.wrong   .pbq-order-num { color: var(--clr-danger); }

.pbq-order-text {
  flex: 1;
  font-size: 0.85rem;
  line-height: 1.4;
}

.pbq-order-btns {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}
.pbq-order-mv {
  width: 28px;
  height: 24px;
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  background: var(--clr-surface);
  color: var(--clr-text-muted);
  cursor: pointer;
  font-size: 0.7rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), color var(--transition-fast);
  padding: 0;
}
.pbq-order-mv:hover:not(:disabled) { background: var(--clr-primary); color: var(--clr-primary-fg); border-color: var(--clr-primary); }
.pbq-order-mv:disabled { opacity: 0.3; cursor: default; }

.pbq-state-icon { font-size: 1rem; flex-shrink: 0; color: var(--clr-accent); }
.pbq-wrong-icon { color: var(--clr-danger); }

/* Correct order summary shown after check */
.pbq-correct-order {
  background: var(--clr-surface-2);
  border-left: 4px solid var(--clr-accent);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.pbq-correct-step {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.83rem;
  line-height: 1.4;
}

/* Touch: bigger tap targets */
.is-touch .pbq-label-btn,
.is-touch .pbq-match-btn { min-height: 52px; }
.is-touch .pbq-order-item { min-height: 60px; }
.is-touch .pbq-order-mv { width: 36px; height: 30px; }

/* ============================================================
   MOCK EXAM MODE
   ============================================================ */
.mock-exam-view {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-bottom: 24px;
}
.mock-exam-header {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 10px 14px;
}
.mock-exam-meta { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 80px; }
.mock-q-counter { font-size: 0.95rem; font-weight: 600; color: var(--clr-text); }
.mock-answered-count { font-size: 0.75rem; color: var(--clr-text-muted); }
.mock-timer {
  font-size: 1.25rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--clr-primary);
  letter-spacing: 0.05em;
  padding: 4px 10px;
  background: var(--clr-surface-2);
  border-radius: var(--radius-sm);
  min-width: 70px;
  text-align: center;
}
.mock-timer.urgent {
  color: var(--clr-danger);
  background: color-mix(in srgb, var(--clr-danger) 12%, transparent);
  animation: pulse-timer 1s ease-in-out infinite;
}
@keyframes pulse-timer { 0%,100% { opacity:1; } 50% { opacity:0.6; } }
.mock-flag-btn {
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  background: var(--clr-surface);
  color: var(--clr-text-muted);
  font-size: 0.82rem;
  padding: 6px 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}
.mock-flag-btn.flagged {
  background: color-mix(in srgb, var(--clr-warning) 15%, transparent);
  border-color: var(--clr-warning);
  color: var(--clr-warning);
}
.mock-overview {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 10px;
  max-height: 110px;
  overflow-y: auto;
}
.mock-overview-btn {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1px solid var(--clr-border);
  background: var(--clr-surface-2);
  color: var(--clr-text-muted);
  font-size: 0.65rem; font-weight: 600;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.mock-overview-btn.answered  { background: var(--clr-primary);  color: var(--clr-primary-fg);  border-color: var(--clr-primary); }
.mock-overview-btn.flagged   { background: var(--clr-warning);  color: var(--clr-warning-fg);  border-color: var(--clr-warning); }
.mock-overview-btn.current   { background: var(--clr-accent);   color: var(--clr-accent-fg);   border-color: var(--clr-accent); box-shadow: 0 0 0 2px var(--clr-accent); }
.mock-overview-btn:hover:not(.current) { opacity: 0.8; transform: scale(1.1); }
.option-btn.mock-selected {
  background: color-mix(in srgb, var(--clr-primary) 12%, transparent);
  border-color: var(--clr-primary); color: var(--clr-primary); font-weight: 600;
}
.mock-nav-row { display: flex; gap: 8px; align-items: center; }
.mock-nav-row .nav-btn { flex: 1; }
.mock-nav-row .btn-danger { flex: 1.5; }

/* ============================================================
   MOCK EXAM RESULTS
   ============================================================ */
.mock-results-banner { border-radius: var(--radius); padding: 24px; text-align: center; margin-bottom: 8px; }
.mock-results-banner.pass { background: color-mix(in srgb, var(--clr-accent) 12%, transparent); border: 2px solid var(--clr-accent); }
.mock-results-banner.fail { background: color-mix(in srgb, var(--clr-danger) 10%, transparent); border: 2px solid var(--clr-danger); }
.mock-results-score { font-size: 3rem; font-weight: 700; line-height: 1; margin-bottom: 6px; }
.mock-results-banner.pass .mock-results-score { color: var(--clr-accent); }
.mock-results-banner.fail .mock-results-score { color: var(--clr-danger); }
.mock-results-verdict { font-size: 1.1rem; font-weight: 600; margin-bottom: 6px; }
.mock-results-detail { font-size: 0.85rem; color: var(--clr-text-muted); }
.mock-results-actions { display: flex; gap: 10px; margin-top: 16px; }
.mock-results-actions .btn { flex: 1; }

/* ============================================================
   SHARED BUTTON VARIANTS
   ============================================================ */
.btn-secondary {
  background: var(--clr-surface-2); color: var(--clr-text);
  border: 1px solid var(--clr-border);
}
.btn-secondary:hover { background: var(--clr-border); }
.btn-danger { background: var(--clr-danger); color: var(--clr-danger-fg); border: none; }
.btn-danger:hover { opacity: 0.9; }

/* ============================================================
   OBJECTIVE FILTER
   ============================================================ */
.obj-filter-toggle {
  display: flex; align-items: center; gap: 6px;
  background: none;
  border: 1px solid var(--clr-border); border-radius: var(--radius-sm);
  padding: 7px 12px;
  color: var(--clr-text-muted);
  font-size: 0.85rem; cursor: pointer; width: 100%; text-align: left;
  transition: all var(--transition-fast);
}
.obj-filter-toggle:hover { background: var(--clr-surface-2); color: var(--clr-text); }
.obj-filter-toggle[aria-expanded="true"] { border-color: var(--clr-primary); color: var(--clr-primary); }
.obj-filter-body { display: flex; flex-wrap: wrap; gap: 6px; padding: 8px 0 2px; }
.obj-filter-chip {
  border: 1px solid var(--clr-border); border-radius: 20px;
  padding: 4px 12px; font-size: 0.78rem; font-weight: 500;
  background: var(--clr-surface-2); color: var(--clr-text-muted);
  cursor: pointer; transition: all var(--transition-fast); white-space: nowrap;
}
.obj-filter-chip.selected { background: var(--clr-primary); color: var(--clr-primary-fg); border-color: var(--clr-primary); }
.obj-filter-chip:hover:not(.selected) { border-color: var(--clr-primary); color: var(--clr-primary); }
.obj-filter-actions { display: flex; gap: 8px; align-items: center; padding-top: 4px; }
.obj-filter-clear { background: none; border: none; color: var(--clr-text-muted); font-size: 0.75rem; cursor: pointer; padding: 4px 6px; text-decoration: underline; }
.obj-filter-clear:hover { color: var(--clr-danger); }
.obj-filter-hint { font-size: 0.75rem; color: var(--clr-accent); font-weight: 500; }

/* ============================================================
   STREAK BADGE
   ============================================================ */
.streak-badge {
  display: inline-flex; align-items: center; gap: 4px;
  background: color-mix(in srgb, var(--clr-warning) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--clr-warning) 40%, transparent);
  border-radius: 20px; padding: 3px 10px;
  font-size: 0.8rem; font-weight: 600; color: var(--clr-warning);
}

/* ============================================================
   MOCK EXAM ENTRY CARD (on session-start)
   ============================================================ */
.mock-exam-entry {
  display: flex; align-items: center; gap: 12px;
  border: 1px solid var(--clr-border); border-radius: var(--radius);
  padding: 14px 16px; background: var(--clr-surface);
  cursor: pointer; text-align: left; width: 100%;
  transition: all var(--transition-fast);
}
.mock-exam-entry:hover { border-color: var(--clr-primary); background: color-mix(in srgb, var(--clr-primary) 5%, transparent); }
.mock-exam-entry-icon { font-size: 1.5rem; flex-shrink: 0; }
.mock-exam-entry-label { font-weight: 600; font-size: 0.95rem; margin-bottom: 2px; }
.mock-exam-entry-desc { font-size: 0.8rem; color: var(--clr-text-muted); }

/* ============================================================
   WEAK SPOT DRILL REVIEW
   ============================================================ */
.drill-review-section {
  margin: 1.5rem 0 0;
  border-radius: 12px;
  border: 1.5px solid var(--clr-border);
  background: var(--clr-card);
  overflow: hidden;
  text-align: left;
}
.drill-perfect {
  padding: 1.25rem;
  text-align: center;
  font-size: 1rem;
  color: var(--clr-text-muted);
}
.drill-review-title {
  font-size: 1rem;
  font-weight: 700;
  padding: 0.9rem 1.1rem 0.4rem;
  color: var(--clr-text);
  border-bottom: 1px solid var(--clr-border);
  margin: 0;
}
.drill-review-sub {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  padding: 0.35rem 1.1rem 0.75rem;
  margin: 0;
  border-bottom: 1px solid var(--clr-border);
}
.drill-item {
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--clr-border);
}
.drill-item:last-child { border-bottom: none; }
.drill-item-again { border-left: 3px solid var(--clr-danger, #e53e3e); }
.drill-item-hard  { border-left: 3px solid var(--clr-warning, #d69e2e); }
.drill-item-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.45rem;
}
.drill-rating-tag {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 99px;
  background: var(--clr-surface, #f5f5f5);
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.drill-item-again .drill-rating-tag { background: #fee2e2; color: #b91c1c; }
.drill-item-hard  .drill-rating-tag { background: #fef9c3; color: #92400e; }
.drill-question {
  font-size: 0.88rem;
  color: var(--clr-text);
  margin: 0 0 0.6rem;
  line-height: 1.5;
}
.drill-correct {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: baseline;
  margin-bottom: 0.45rem;
}
.drill-correct-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--clr-success, #276749);
  white-space: nowrap;
}
.drill-correct-answer {
  font-size: 0.82rem;
  color: var(--clr-text);
  font-weight: 500;
}
.drill-explanation {
  font-size: 0.78rem;
  color: var(--clr-text-muted);
  margin: 0;
  line-height: 1.5;
  padding-top: 0.4rem;
  border-top: 1px dashed var(--clr-border);
}