/* ====== Quiz Pages — Refined Bauhaus ====== */
@import url('variables.css');
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --card: #ffffff;
  --grid: rgba(0,0,0,0.02);
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}
body {
  font-family: var(--font-display);
  background: var(--void); color: var(--text); min-height: 100vh; padding: 1.25rem;
}
.container { max-width: 720px; margin: 0 auto; }

/* ====== Header ====== */
.header { text-align: center; padding: 2.5rem 0 1.5rem; position: relative; }
.header .badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  color: var(--gold);
  border: 1px solid rgba(217,119,6,0.3);
  padding: 0.25rem 1rem;
  border-radius: 999px;
  margin-bottom: 1rem;
  text-transform: uppercase;
}
.header h1 {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}
.header h1 span { color: var(--blue); }
.header .subtitle {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* ====== Navigation ====== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--sub);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  transition: color 0.2s;
}
.back-link:hover { color: var(--blue); }
.quiz-nav { display: flex; gap: 0; justify-content: center; align-items: center; margin-bottom: 1.5rem; }
.quiz-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--sub);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.2s;
  flex-shrink: 0;
  line-height: 1;
}
.quiz-arrow:hover { border-color: var(--blue); color: var(--blue); background: rgba(37,99,235,0.05); }
.quiz-arrow.disabled { opacity: 0.2; pointer-events: none; }
.quiz-dropdown { position: relative; margin: 0 0.5rem; }
.quiz-dropdown-btn {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 1.2rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
  cursor: pointer;
  transition: all 0.2s;
}
.quiz-dropdown-btn:hover { border-color: var(--blue); }
.quiz-dropdown-btn .arrow-icon { font-size: 0.55rem; transition: transform 0.2s; }
.quiz-dropdown.open .arrow-icon { transform: rotate(180deg); }
.quiz-dropdown-menu {
  display: none;
  position: absolute;
  top: 110%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
  z-index: 200;
  min-width: 130px;
  overflow: hidden;
  padding: 0.3rem;
}
.quiz-dropdown.open .quiz-dropdown-menu { display: block; }
.quiz-dropdown-menu a {
  display: block;
  padding: 0.45rem 1rem;
  font-size: 0.82rem;
  font-family: var(--font-display);
  color: var(--sub);
  text-decoration: none;
  transition: all 0.15s;
  text-align: center;
  border-radius: 6px;
}
.quiz-dropdown-menu a:hover { background: rgba(37,99,235,0.06); color: var(--blue); }
.quiz-dropdown-menu a.active { background: rgba(37,99,235,0.1); color: var(--blue); font-weight: 600; }

/* ====== Sticky Toolbar ====== */
.sticky-toolbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.75rem 0;
  background: var(--void);
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.sticky-toolbar .back-link { margin-bottom: 0; }
.sticky-toolbar .score-bar { margin: 0; padding: 0; border: none; background: transparent; }
.score-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border-radius: 10px;
  margin: 1.5rem 0;
  border: 1px solid var(--border);
  flex-wrap: wrap;
}
.score-item { text-align: center; }
.score-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--gold);
}
.score-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  margin-top: 0.1rem;
  text-transform: uppercase;
}
.score-btn {
  background: var(--blue);
  color: #fff;
  border: none;
  padding: 0.5rem 1.4rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.82rem;
  cursor: pointer;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.2s;
}
.score-btn:hover { opacity: 0.85; transform: translateY(-1px); }

/* ====== Section ====== */
.section { margin-bottom: 2.5rem; }
.section-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  padding-bottom: 0.6rem;
  margin-bottom: 1.25rem;
  border-bottom: 2px solid var(--border);
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.section-title .icon {
  width: 8px; height: 8px;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  border-radius: 50%;
  flex-shrink: 0;
}

/* ====== Cards ====== */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  position: relative;
}
.card:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.04); }
.card.correct { border-color: var(--green); box-shadow: 0 0 0 1px rgba(5,150,105,0.1); }
.card.wrong { border-color: var(--red); box-shadow: 0 0 0 1px rgba(220,38,38,0.1); }
.card-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: 0.75rem; }
.card-qnum {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  white-space: nowrap;
}
.card-type {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-weight: 600;
  text-transform: uppercase;
}
.card-type.choice { background: rgba(37,99,235,0.1); color: var(--blue); }
.card-type.fill { background: rgba(217,119,6,0.1); color: var(--gold); }
.card-type.short { background: rgba(5,150,105,0.1); color: var(--green); }
.card-type.write { background: rgba(155,126,196,0.1); color: var(--purple); }
.card-question {
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 0.75rem;
  color: var(--text);
}
.card-question code {
  background: var(--code-bg);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.82em;
  color: #374151;
}
.card-desc {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--sub);
  margin-bottom: 0.5rem;
}

/* ====== Code Blocks ====== */
.code-block {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  margin: 0.75rem 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.7;
  color: #374151;
  overflow-x: auto;
  white-space: pre-wrap;
  tab-size: 4;
}
.code-block .kw { color: #7c3aed; font-weight: 500; }
.code-block .fn { color: #2563eb; }
.code-block .str { color: #059669; }
.code-block .cm { color: #9ca3af; font-style: italic; }
.code-block .num { color: #d97706; }
.code-block .op { color: #0891b2; }

/* ====== Fill Input (contenteditable) ====== */
.blank-input {
  display: inline-block;
  min-width: 60px;
  max-width: 140px;
  border: none;
  border-bottom: 2px dashed var(--gold);
  padding: 0.1rem 0.3rem;
  margin: 0 0.15rem;
  color: var(--text);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  outline: none;
  background: transparent;
  transition: border-color 0.2s, background 0.2s;
}
.blank-input:focus { border-bottom-color: var(--blue); border-bottom-style: solid; background: rgba(37,99,235,0.04); }
.blank-input.filled { border-bottom-style: solid; border-bottom-color: var(--gold); background: rgba(217,119,6,0.04); }
.blank-input.correct-fill { border-bottom-color: var(--green); color: var(--green); background: rgba(5,150,105,0.08); }
.blank-input.wrong-fill { border-bottom-color: var(--red); color: var(--red); background: rgba(220,38,38,0.08); }

/* ====== Options ====== */
.options { display: grid; gap: 0.5rem; }
.option {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--sub);
}
.option:hover { background: rgba(0,0,0,0.02); border-color: var(--muted); }
.option.selected { border-color: var(--blue); color: var(--text); background: rgba(37,99,235,0.06); }
.option.correct-option { border-color: var(--green); background: rgba(5,150,105,0.08); color: var(--text); }
.option.wrong-option { border-color: var(--red); background: rgba(220,38,38,0.06); color: var(--text); }
.option-letter {
  width: 26px; height: 26px;
  border-radius: 8px;
  border: 1.5px solid var(--muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  flex-shrink: 0;
  font-family: var(--font-mono);
  transition: all 0.2s;
}
.option.selected .option-letter { border-color: var(--blue); background: rgba(37,99,235,0.15); color: var(--blue); }
.option.correct-option .option-letter { border-color: var(--green); background: rgba(5,150,105,0.2); color: var(--green); }
.option.wrong-option .option-letter { border-color: var(--red); background: rgba(220,38,38,0.2); color: var(--red); }

/* ====== Feedback ====== */
.feedback {
  display: none;
  margin-top: 0.75rem;
  padding: 0.7rem 1rem;
  border-radius: 8px;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--sub);
  background: rgba(255,255,255,0.03);
  border-left: 3px solid var(--border);
}
.feedback.show { display: block; }
.feedback.correct-fb { border-left-color: var(--green); color: #065f46; background: rgba(5,150,105,0.05); }
.feedback.wrong-fb { border-left-color: var(--red); color: #991b1b; background: rgba(220,38,38,0.05); }
.feedback .result-tag { font-weight: 700; font-size: 0.72rem; letter-spacing: 0.06em; margin-bottom: 0.3rem; font-family: var(--font-mono); }
.feedback .result-tag.correct-tag { color: var(--green); }
.feedback .result-tag.wrong-tag { color: var(--red); }

/* ====== Textarea & Code Editor ====== */
.fill-input {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.6rem 0.8rem;
  width: 100%;
  margin-top: 0.5rem;
  transition: border-color 0.2s;
}
.fill-input:focus { outline: none; border-color: var(--gold); box-shadow: 0 0 0 2px rgba(217,119,6,0.08); }
.fill-input:disabled { opacity: 0.5; cursor: not-allowed; }
textarea.fill-input { resize: vertical; min-height: 80px; font-family: var(--font-display); font-size: 0.85rem; }
.code-editor {
  background: #f8f9fa;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: #1a1a1a;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.65;
  padding: 0.7rem 0.9rem;
  width: 100%;
  min-height: 44px;
  resize: vertical;
  tab-size: 4;
  white-space: pre;
  overflow-y: auto;
  box-sizing: border-box;
  transition: border-color 0.2s;
}
.code-editor:focus { outline: none; border-color: var(--gold); box-shadow: 0 0 0 2px rgba(217,119,6,0.08); }
.code-editor:disabled { opacity: 0.55; cursor: not-allowed; }

/* ====== Reference Answer Toggle ====== */
.card .ref-toggle {
  display: inline-block;
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gold);
  cursor: pointer;
  border-bottom: 1px dashed rgba(217,119,6,0.4);
  padding-bottom: 0.1rem;
  letter-spacing: 0.03em;
  transition: all 0.2s;
}
.card .ref-toggle:hover { color: #f0c860; border-bottom-color: var(--gold); }
.card .ref-answer { display: none; margin-top: 0.5rem; }
.card .ref-answer.show { display: block; }

/* ====== Toast ====== */
.toast {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--green);
  color: #fff;
  padding: 0.5rem 1.5rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(5,150,105,0.3);
}
.toast.show { opacity: 1; }

/* ====== History Panel ====== */
.history-panel {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  width: 380px;
  max-width: 90vw;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  margin-top: 0.3rem;
  box-shadow: 0 16px 40px rgba(0,0,0,0.12);
  z-index: 300;
  max-height: 360px;
  overflow-y: auto;
}
.history-panel.show { display: block; }
.history-panel h4 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.history-clear {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--red);
  cursor: pointer;
  border: none;
  background: none;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  transition: background 0.2s;
}
.history-clear:hover { background: rgba(220,38,38,0.08); }
.history-list { list-style: none; }
.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.55rem 0.3rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 0.15s;
  border-radius: 4px;
}
.history-item:hover { background: var(--code-bg); }
.history-item:last-child { border-bottom: none; }
.history-date { font-family: var(--font-mono); color: var(--muted); font-size: 0.72rem; }
.history-score { font-family: var(--font-mono); font-weight: 700; font-size: 0.82rem; }
.history-score.high { color: var(--green); }
.history-score.mid { color: var(--gold); }
.history-score.low { color: var(--red); }
.history-empty {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
  padding: 1.5rem 0;
}

/* ====== History Detail Modal ====== */
.history-detail-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 100;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.history-detail-overlay.show { display: flex; }
.history-detail {
  background: var(--surface);
  border-radius: 16px;
  max-width: 650px;
  width: 92%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 24px 48px rgba(0,0,0,0.2);
}
.history-detail-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--surface);
  border-radius: 16px 16px 0 0;
}
.history-detail-header h4 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}
.history-detail-close {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--muted);
  padding: 0 0.3rem;
  line-height: 1;
  transition: color 0.2s;
}
.history-detail-close:hover { color: var(--text); }
.history-detail-body { padding: 1.25rem 1.5rem; }
.history-detail-info {
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--sub);
}
.history-detail-q {
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}
.history-detail-q:last-child { border-bottom: none; }
.history-detail-q .dq-num {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text);
  margin-right: 0.4rem;
}
.history-detail-q .dq-badge {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  margin-right: 0.5rem;
  font-weight: 600;
}
.dq-badge.correct { background: rgba(5,150,105,0.1); color: var(--green); }
.dq-badge.wrong { background: rgba(220,38,38,0.1); color: var(--red); }
.dq-badge.subj { background: rgba(217,119,6,0.1); color: var(--gold); }

/* ====== Mobile Responsive ====== */
@media (max-width: 600px) {
  body { padding: 0.5rem; }
  .container { padding: 0 0.5rem; }
  .header { padding: 1.5rem 0 0.75rem; }
  .header h1 { font-size: 1.5rem; }
  .sticky-toolbar { flex-direction: column; align-items: stretch; gap: 0.5rem; padding: 0.5rem 0; }
  .sticky-toolbar .back-link { margin-bottom: 0.25rem; }
  .score-bar { gap: 0.75rem; }
  .score-btn { padding: 0.45rem 0.9rem; font-size: 0.78rem; }
  .history-panel {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100%;
    max-width: 100%;
    border-radius: 0;
    margin: 0;
    max-height: 100vh;
  }
}

@media (max-width: 480px) {
  .score-bar { gap: 0.5rem; justify-content: flex-start; }
  .score-num { font-size: 1.3rem; }
  .card { padding: 1.1rem; }
  .card-question { font-size: 0.88rem; }
  .option { padding: 0.55rem 0.65rem; font-size: 0.85rem; }
  .code-editor { font-size: 0.76rem; padding: 0.6rem 0.7rem; }
  .quiz-dropdown-btn { padding: 0.35rem 0.8rem; font-size: 0.78rem; }
}

/* ====== Dark Mode (system preference) ====== */
@media (prefers-color-scheme: dark) {
  :root {
    --void: #0d0d0d;
    --surface: #1a1a1a;
    --card: #1a1a1a;
    --text: #e5e5e5;
    --sub: #9ca3af;
    --muted: #6b7280;
    --border: rgba(255,255,255,0.08);
    --code-bg: #111111;
    --grid: rgba(255,255,255,0.03);
  }
  .card { border-color: rgba(255,255,255,0.08); }
  .card-question code { background: #111; color: #d1d5db; }
  .fill-input, .code-editor { background: #111; color: #e5e5e5; border-color: rgba(255,255,255,0.08); }
  .code-editor { background: #f8f9fa !important; color: #1a1a1a !important; }
  .option { border-color: rgba(255,255,255,0.08); color: #9ca3af; }
  .option:hover { background: rgba(255,255,255,0.03); }
  .option.selected { border-color: var(--blue); color: #e5e5e5; background: rgba(37,99,235,0.12); }
  .history-panel { background: #1a1a1a; border-color: rgba(255,255,255,0.08); box-shadow: 0 16px 40px rgba(0,0,0,0.3); }
  .history-item { border-bottom-color: rgba(255,255,255,0.06); }
  .history-item:hover { background: #111; }
  .quiz-dropdown-btn { background: #1a1a1a; border-color: rgba(255,255,255,0.08); color: #e5e5e5; }
  .quiz-dropdown-menu { background: #1a1a1a; border-color: rgba(255,255,255,0.08); box-shadow: 0 12px 32px rgba(0,0,0,0.3); }
  .quiz-nav .quiz-arrow { border-color: rgba(255,255,255,0.08); color: #9ca3af; }
  .sticky-toolbar { border-bottom-color: rgba(255,255,255,0.06); }
  .code-block { background: #111; border-color: rgba(255,255,255,0.06); }
  .card-type { background: rgba(255,255,255,0.08); }
  .card-type.choice { background: rgba(37,99,235,0.15); color: #93c5fd; }
  .card-type.fill { background: rgba(217,119,6,0.15); color: #fcd34d; }
  .card-type.short { background: rgba(5,150,105,0.15); color: #6ee7b7; }
  .card-type.write { background: rgba(155,126,196,0.15); color: #c4b5fd; }
  .card.correct { border-color: var(--green); box-shadow: 0 0 0 1px rgba(5,150,105,0.15); }
  .card.wrong { border-color: var(--red); box-shadow: 0 0 0 1px rgba(220,38,38,0.15); }
  .toast { background: var(--green); box-shadow: 0 4px 12px rgba(5,150,105,0.3); }
  .section-title { border-bottom-color: rgba(255,255,255,0.06); }
  .history-detail { box-shadow: 0 24px 48px rgba(0,0,0,0.4); }
  .history-detail-header { border-bottom-color: rgba(255,255,255,0.06); }
  .history-detail-q { border-bottom-color: rgba(255,255,255,0.06); }
}

/* ====== Dark Mode (manual toggle) ====== */
.dark-mode { --void: #0d0d0d; --surface: #1a1a1a; --card: #1a1a1a; --text: #e5e5e5; --sub: #9ca3af; --muted: #6b7280; --border: rgba(255,255,255,0.08); --code-bg: #111111; --grid: rgba(255,255,255,0.03); }
.dark-mode body, .dark-mode { background: #0d0d0d; color: #e5e5e5; }
.dark-mode .card { border-color: rgba(255,255,255,0.08); }
.dark-mode .card-question code { background: #111; color: #d1d5db; }
.dark-mode .fill-input, .dark-mode .code-editor { background: #111; color: #e5e5e5; border-color: rgba(255,255,255,0.08); }
.dark-mode .code-editor { background: #f8f9fa !important; color: #1a1a1a !important; }
.dark-mode .option { border-color: rgba(255,255,255,0.08); color: #9ca3af; }
.dark-mode .option:hover { background: rgba(255,255,255,0.03); }
.dark-mode .option.selected { border-color: var(--blue); color: #e5e5e5; background: rgba(37,99,235,0.12); }
.dark-mode .history-panel { background: #1a1a1a; border-color: rgba(255,255,255,0.08); }
.dark-mode .history-item { border-bottom-color: rgba(255,255,255,0.06); }
.dark-mode .history-item:hover { background: #111; }
.dark-mode .quiz-dropdown-btn { background: #1a1a1a; border-color: rgba(255,255,255,0.08); color: #e5e5e5; }
.dark-mode .quiz-dropdown-menu { background: #1a1a1a; border-color: rgba(255,255,255,0.08); }
.dark-mode .quiz-nav .quiz-arrow { border-color: rgba(255,255,255,0.08); color: #9ca3af; }
.dark-mode .sticky-toolbar { border-bottom-color: rgba(255,255,255,0.06); }
.dark-mode .code-block { background: #111; border-color: rgba(255,255,255,0.06); }
.dark-mode .card-type { background: rgba(255,255,255,0.08); }
.dark-mode .card.correct { border-color: var(--green); }
.dark-mode .card.wrong { border-color: var(--red); }
.dark-mode .back-link { color: #9ca3af; }
.dark-mode .back-link:hover { color: #e5e5e5; }