:root {
  /* Fresh Green (default) */
  --bg: oklch(98% 0.01 145);
  --bg-soft: oklch(96% 0.02 145);
  --card: #ffffff;
  --ink: oklch(22% 0.03 145);
  --ink-soft: oklch(42% 0.02 145);
  --ink-mute: oklch(62% 0.01 145);
  --line: oklch(92% 0.015 145);
  --line-soft: oklch(95% 0.01 145);
  --accent: oklch(62% 0.15 150);
  --accent-ink: #ffffff;
  --accent-soft: oklch(92% 0.08 150);
  --accent-deep: oklch(42% 0.14 150);
  --warn: oklch(68% 0.16 55);
  --wrong: oklch(62% 0.2 25);
  --wrong-soft: oklch(95% 0.05 25);
  --correct: oklch(62% 0.15 150);
  --correct-soft: oklch(94% 0.08 150);
  --shadow-sm: 0 1px 2px oklch(40% 0.05 145 / 0.05), 0 2px 8px oklch(40% 0.05 145 / 0.04);
  --shadow-md: 0 4px 12px oklch(40% 0.05 145 / 0.08), 0 2px 4px oklch(40% 0.05 145 / 0.05);
  --shadow-lg: 0 12px 40px oklch(40% 0.05 145 / 0.12), 0 4px 12px oklch(40% 0.05 145 / 0.06);
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 20px;
}
[data-theme="mint"] {
  --bg: oklch(98% 0.015 175);
  --bg-soft: oklch(96% 0.025 175);
  --accent: oklch(62% 0.14 175);
  --accent-soft: oklch(92% 0.08 175);
  --accent-deep: oklch(42% 0.13 175);
  --correct: oklch(62% 0.14 175);
  --correct-soft: oklch(94% 0.08 175);
  --ink: oklch(22% 0.03 175);
  --ink-soft: oklch(42% 0.02 175);
  --ink-mute: oklch(62% 0.01 175);
  --line: oklch(92% 0.015 175);
  --line-soft: oklch(95% 0.01 175);
}
[data-theme="forest"] {
  --bg: oklch(97% 0.015 140);
  --bg-soft: oklch(94% 0.02 140);
  --accent: oklch(45% 0.13 140);
  --accent-soft: oklch(88% 0.06 140);
  --accent-deep: oklch(32% 0.12 140);
  --correct: oklch(45% 0.13 140);
  --correct-soft: oklch(92% 0.06 140);
  --ink: oklch(20% 0.03 140);
  --ink-soft: oklch(40% 0.02 140);
  --ink-mute: oklch(58% 0.015 140);
  --line: oklch(90% 0.02 140);
  --line-soft: oklch(94% 0.015 140);
}
[data-theme="indigo"] {
  --bg: oklch(98% 0.01 265);
  --bg-soft: oklch(96% 0.02 265);
  --accent: oklch(55% 0.16 265);
  --accent-soft: oklch(93% 0.06 265);
  --accent-deep: oklch(38% 0.15 265);
  --correct: oklch(62% 0.15 150);
  --correct-soft: oklch(94% 0.08 150);
  --ink: oklch(22% 0.03 265);
  --ink-soft: oklch(42% 0.02 265);
  --ink-mute: oklch(62% 0.01 265);
  --line: oklch(92% 0.015 265);
  --line-soft: oklch(95% 0.01 265);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Noto Sans JP", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "palt";
}
button { font-family: inherit; cursor: pointer; }
.mono { font-family: "JetBrains Mono", ui-monospace, monospace; }

/* --- Top bar --- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1160px; margin: 0 auto;
  padding: 16px 24px;
  display: flex; align-items: center; gap: 16px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 18px; letter-spacing: -0.01em;
  color: var(--ink); text-decoration: none;
}
.logo-mark {
  width: 32px; height: 32px;
  background: var(--accent);
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-ink);
  font-weight: 800; font-size: 14px;
  box-shadow: 0 2px 8px color-mix(in oklab, var(--accent) 30%, transparent);
}
.logo-sub { color: var(--ink-mute); font-weight: 500; font-size: 13px; margin-left: 4px; }
.topbar-spacer { flex: 1; }
.streak-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px 6px 10px;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 999px; font-size: 13px; font-weight: 600;
  color: var(--ink-soft);
}
.streak-pill .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--accent) 15%, transparent);
}

/* --- Back link (exam pages → index) --- */
.back-link {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 8px; font-size: 13px; font-weight: 500;
  color: var(--ink-soft); text-decoration: none;
  transition: all 140ms;
  white-space: nowrap;
}
.back-link:hover { color: var(--ink); border-color: var(--ink-mute); background: var(--bg-soft); }

/* --- Layout --- */
.container { max-width: 1160px; margin: 0 auto; padding: 40px 24px 80px; }

/* --- Menu hero --- */
.hero { margin-bottom: 36px; }
.hero h1 {
  font-size: 40px; font-weight: 800; letter-spacing: -0.02em;
  margin: 0 0 10px; line-height: 1.15;
}
.hero h1 .accent { color: var(--accent-deep); }
.hero p { color: var(--ink-soft); font-size: 16px; margin: 0; max-width: 640px; line-height: 1.7; }

/* --- Section label --- */
.section-label {
  display: flex; align-items: center; gap: 12px;
  margin: 36px 0 18px;
}
.section-label .pip {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
}
.section-label h2 {
  font-size: 14px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-soft); margin: 0;
}
.section-label .count {
  color: var(--ink-mute); font-size: 13px; font-weight: 500;
}

/* --- Exam cards grid --- */
.exam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
/* <a> wrapper for index page cards */
.exam-card-link { text-decoration: none; color: inherit; display: block; }
.exam-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  cursor: pointer;
  transition: all 200ms ease;
  text-align: left;
  position: relative;
  overflow: hidden;
  width: 100%;
}
.exam-card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--accent-soft) 0%, transparent 50%);
  opacity: 0; transition: opacity 200ms;
  pointer-events: none;
}
.exam-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: color-mix(in oklab, var(--accent) 30%, var(--line)); }
.exam-card:hover::before { opacity: 0.4; }
.exam-card.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 1px var(--accent) inset, var(--shadow-md);
}
.exam-card.active::before { opacity: 0; }
.exam-head {
  display: flex; align-items: flex-start; gap: 14px;
  margin-bottom: 14px;
}
.exam-badge {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: color-mix(in oklab, var(--accent) 12%, var(--card));
  color: var(--accent-deep);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 14px;
  letter-spacing: 0.02em;
  flex-shrink: 0;
  position: relative; z-index: 1;
}
.exam-card.active .exam-badge {
  background: var(--accent); color: var(--accent-ink);
}
.exam-card-link:hover .exam-badge {
  background: var(--accent); color: var(--accent-ink);
}
.exam-title { flex: 1; position: relative; z-index: 1; }
.exam-title h3 { margin: 0 0 4px; font-size: 16px; font-weight: 700; letter-spacing: -0.01em; line-height: 1.3; }
.exam-level {
  display: inline-block;
  font-size: 11px; font-weight: 600;
  padding: 2px 8px; border-radius: 999px;
  background: var(--bg-soft);
  color: var(--ink-soft);
  border: 1px solid var(--line);
}
.exam-desc {
  color: var(--ink-soft); font-size: 13px; line-height: 1.6;
  margin: 0 0 14px; position: relative; z-index: 1;
  text-wrap: pretty;
}
.exam-stats {
  display: flex; align-items: center; gap: 16px;
  font-size: 12px; color: var(--ink-mute);
  position: relative; z-index: 1;
}
.exam-stats .stat { display: flex; align-items: center; gap: 5px; }
.exam-stats svg { width: 14px; height: 14px; opacity: 0.7; }

/* --- Category panel --- */
.category-panel {
  margin-top: 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  animation: slideDown 320ms cubic-bezier(0.16, 1, 0.3, 1);
}
.category-panel.no-anim { animation: none; }
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}
.category-panel-head {
  padding: 24px 28px;
  background: linear-gradient(135deg, var(--accent-soft) 0%, var(--card) 100%);
  border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 16px;
}
.category-panel-head .exam-badge { width: 44px; height: 44px; font-size: 13px; }
.category-panel-head h3 {
  margin: 0 0 2px; font-size: 18px; font-weight: 700; letter-spacing: -0.01em;
}
.category-panel-head .sub { color: var(--ink-soft); font-size: 13px; }
.category-panel-body { padding: 20px 28px 28px; }
.category-panel-body h4 {
  font-size: 12px; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--ink-mute);
  margin: 0 0 14px;
}
.year-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}
.year-card {
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  cursor: pointer;
  text-align: left;
  transition: all 160ms ease;
  display: flex; align-items: center; gap: 14px;
}
.year-card:hover {
  background: color-mix(in oklab, var(--accent) 6%, var(--card));
  border-color: var(--accent);
  transform: translateX(2px);
}
.year-card .year-num {
  font-family: "JetBrains Mono", monospace;
  font-size: 20px; font-weight: 600;
  color: var(--accent-deep);
  letter-spacing: -0.02em;
  display: flex; align-items: center; gap: 6px;
}
.year-season {
  font-family: inherit;
  font-size: 11px; font-weight: 700;
  background: var(--accent-soft); color: var(--accent-deep);
  border-radius: 4px; padding: 1px 5px;
  letter-spacing: 0;
}
.year-card .year-meta {
  flex: 1;
  font-size: 12px; color: var(--ink-mute);
}
.year-card .year-meta strong { display: block; color: var(--ink); font-weight: 600; font-size: 13px; margin-bottom: 1px; }
.year-card .chev { color: var(--ink-mute); transition: transform 160ms; }
.year-card:hover .chev { transform: translateX(3px); color: var(--accent-deep); }

/* --- Question count selector --- */
.count-selector {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}
.count-btn {
  flex: 1;
  min-width: 56px;
  padding: 10px 4px;
  background: var(--bg-soft);
  border: 2px solid var(--line-soft);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: "JetBrains Mono", monospace;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-mute);
  transition: all 160ms ease;
  text-align: center;
  line-height: 1.1;
}
.count-btn .count-unit {
  font-family: inherit;
  font-size: 11px;
  font-weight: 500;
  display: block;
  margin-top: 2px;
  color: inherit;
}
.count-btn:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
  background: var(--accent-soft);
}
.count-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  box-shadow: var(--shadow-sm);
}
.count-btn.active .count-unit {
  color: var(--accent-ink);
  opacity: 0.85;
}

/* --- Test screen --- */
.test-topbar {
  position: sticky; top: 0; z-index: 20;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.test-topbar-inner {
  max-width: 820px; margin: 0 auto;
  padding: 16px 24px;
  display: flex; align-items: center; gap: 16px;
}
.test-topbar .back-btn {
  background: transparent; border: none; padding: 6px 10px 6px 6px;
  color: var(--ink-soft); font-size: 13px; font-weight: 500;
  display: flex; align-items: center; gap: 6px;
  border-radius: 8px;
}
.test-topbar .back-btn:hover { background: var(--bg-soft); color: var(--ink); }
.test-topbar h1 { margin: 0; font-size: 15px; font-weight: 700; letter-spacing: -0.005em; }
.test-topbar .meta { color: var(--ink-mute); font-size: 13px; }

.progress-bar {
  height: 4px; width: 100%;
  background: var(--line-soft);
}
.progress-bar .fill {
  height: 100%; background: var(--accent);
  transition: width 320ms cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: 0 2px 2px 0;
}

.test-container { max-width: 820px; margin: 0 auto; padding: 40px 24px 120px; }
.q-counter {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px;
}
.q-counter .label {
  font-family: "JetBrains Mono", monospace;
  font-size: 13px; color: var(--ink-mute); font-weight: 600;
  letter-spacing: 0.04em;
}
.q-counter .label .current { color: var(--accent-deep); font-size: 16px; }
.dots { display: flex; gap: 4px; flex-wrap: wrap; max-width: 60%; justify-content: flex-end; }
.dot-cell {
  width: 18px; height: 6px; border-radius: 3px;
  background: var(--line);
  transition: all 180ms;
}
.dot-cell.answered { background: var(--accent); }
.dot-cell.current { background: var(--ink); width: 22px; }

.question-box {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
  animation: fadeSlide 280ms ease;
}
@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.question-box .q-tag {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px; font-weight: 600;
  color: var(--accent-deep);
  background: var(--accent-soft);
  padding: 4px 10px; border-radius: 999px;
  margin-bottom: 16px; letter-spacing: 0.05em;
}
.question-box .q-text {
  font-size: 17px; line-height: 1.6; font-weight: 600;
  margin: 0 0 28px; letter-spacing: -0.005em;
  text-wrap: pretty;
}

/* --- 問題文・選択肢内画像 --- */
.q-image {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--line);
  margin: 8px 0;
}

/* --- 問題文内テーブル --- */
.q-table-wrap {
  overflow-x: auto;
  margin: 12px 0;
}
.q-table {
  border-collapse: collapse;
  font-size: 15px;
  font-weight: 500;
  min-width: 100%;
  white-space: nowrap;
}
.q-table th,
.q-table td {
  border: 1px solid var(--line);
  padding: 8px 14px;
  text-align: left;
  line-height: 1.5;
}
.q-table th {
  color: var(--accent-deep);
  font-weight: 700;
}
.q-table tr:nth-child(even) td {
}
.choices { display: flex; flex-direction: column; gap: 10px; }
.choice {
  display: flex; align-items: center; gap: 14px;
  padding: 16px 18px;
  background: var(--bg-soft);
  border: 1.5px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 500; color: var(--ink);
  cursor: pointer;
  transition: all 140ms ease;
  text-align: left;
  line-height: 1.5;
}
.choice:hover {
  border-color: color-mix(in oklab, var(--accent) 30%, var(--line));
  background: var(--card);
}
.choice.selected {
  background: var(--accent-soft);
  border-color: var(--accent);
}
.choice .choice-letter {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--card);
  border: 1.5px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-family: "JetBrains Mono", monospace;
  font-weight: 700; font-size: 13px;
  color: var(--ink-soft);
  flex-shrink: 0;
  transition: all 140ms;
}
.choice.selected .choice-letter {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.choice-text { flex: 1; text-wrap: pretty; }

.test-footer {
  position: fixed; bottom: 0; left: 0; right: 0;
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
  z-index: 15;
}
.test-footer-inner {
  max-width: 820px; margin: 0 auto;
  padding: 16px 24px;
  display: flex; align-items: center; gap: 12px;
}
.btn {
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600; font-size: 14px;
  border: 1px solid transparent;
  transition: all 140ms;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary {
  background: var(--accent); color: var(--accent-ink);
  box-shadow: 0 2px 6px color-mix(in oklab, var(--accent) 35%, transparent);
}
.btn-primary:hover:not(:disabled) { background: var(--accent-deep); transform: translateY(-1px); box-shadow: 0 4px 12px color-mix(in oklab, var(--accent) 40%, transparent); }
.btn-primary:disabled { background: var(--line); color: var(--ink-mute); box-shadow: none; cursor: not-allowed; }
.btn-ghost {
  background: transparent; border-color: var(--line);
  color: var(--ink-soft);
}
.btn-ghost:hover { background: var(--card); color: var(--ink); border-color: var(--ink-mute); }
.btn-ghost:disabled { opacity: 0.4; cursor: not-allowed; }

/* --- Result screen --- */
.result-wrap { max-width: 860px; margin: 0 auto; padding: 40px 24px 80px; }
.result-hero {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  text-align: center;
  position: relative; overflow: hidden;
  box-shadow: var(--shadow-md);
}
.result-hero .confetti {
  position: absolute; inset: 0; pointer-events: none; overflow: hidden;
}
.result-hero .confetti i {
  position: absolute;
  width: 8px; height: 14px;
  border-radius: 2px;
  opacity: 0;
  animation: confetti 1600ms ease-out forwards;
}
@keyframes confetti {
  0% { transform: translateY(-10px) rotate(0); opacity: 0; }
  20% { opacity: 1; }
  100% { transform: translateY(320px) rotate(720deg); opacity: 0; }
}
.result-eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ink-mute);
  margin-bottom: 10px;
}
.result-hero h2 {
  font-size: 28px; font-weight: 800; letter-spacing: -0.02em;
  margin: 0 0 28px;
}
.result-score {
  display: flex; align-items: center; justify-content: center; gap: 40px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.result-ring-wrap {
  position: relative;
  width: 180px; height: 180px;
}
.result-ring { transform: rotate(-90deg); }
.result-ring .track { stroke: var(--line); }
.result-ring .fill { stroke: var(--accent); transition: stroke-dashoffset 1200ms cubic-bezier(0.16, 1, 0.3, 1); }
.result-ring-label {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.result-ring-label .pct {
  font-size: 46px; font-weight: 800; letter-spacing: -0.03em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.result-ring-label .pct-unit { font-size: 18px; color: var(--ink-mute); margin-left: 2px; font-weight: 600; }
.result-ring-label .ratio {
  font-family: "JetBrains Mono", monospace;
  font-size: 13px; color: var(--ink-mute);
  margin-top: 2px;
}
.result-stats {
  display: flex; flex-direction: column; gap: 12px;
  text-align: left;
  min-width: 220px;
}
.result-stat {
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  display: flex; align-items: center; gap: 12px;
}
.result-stat .ico {
  width: 36px; height: 36px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.result-stat .ico.ok { background: var(--correct-soft); color: var(--correct); }
.result-stat .ico.ng { background: var(--wrong-soft); color: var(--wrong); }
.result-stat .ico.rate { background: var(--accent-soft); color: var(--accent-deep); }
.result-stat .num { font-size: 20px; font-weight: 800; letter-spacing: -0.01em; }
.result-stat .lab { font-size: 12px; color: var(--ink-mute); font-weight: 500; }
.result-grade {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 16px;
  padding: 8px 18px;
  border-radius: 999px;
  font-weight: 700; font-size: 14px;
}
.result-grade.good { background: var(--correct-soft); color: var(--correct); }
.result-grade.mid { background: color-mix(in oklab, var(--warn) 15%, var(--card)); color: oklch(45% 0.15 55); }
.result-grade.low { background: var(--wrong-soft); color: var(--wrong); }

.result-actions {
  display: flex; gap: 12px; justify-content: center; margin-top: 28px;
  flex-wrap: wrap;
}

.review-head { margin: 48px 0 18px; display: flex; align-items: center; justify-content: space-between; }
.review-head h3 { margin: 0; font-size: 20px; font-weight: 700; letter-spacing: -0.01em; }
.review-head .filter-toggle {
  display: flex; gap: 4px;
  background: var(--bg-soft); border: 1px solid var(--line-soft);
  padding: 4px; border-radius: 10px;
}
.filter-toggle button {
  background: transparent; border: none; padding: 6px 14px;
  border-radius: 7px; font-size: 12px; font-weight: 600; color: var(--ink-soft);
}
.filter-toggle button.on { background: var(--card); color: var(--ink); box-shadow: var(--shadow-sm); }

.review-list { display: flex; flex-direction: column; gap: 10px; }
.review-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 22px;
  transition: all 140ms;
}
.review-item.open { box-shadow: var(--shadow-sm); }
.review-item-head {
  display: flex; align-items: center; gap: 14px;
  cursor: pointer;
}
.review-idx {
  width: 28px; height: 28px; border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  font-family: "JetBrains Mono", monospace;
  font-weight: 700; font-size: 12px;
  flex-shrink: 0;
}
.review-idx.ok { background: var(--correct-soft); color: var(--correct); }
.review-idx.ng { background: var(--wrong-soft); color: var(--wrong); }
.review-text { flex: 1; font-size: 14px; font-weight: 500; line-height: 1.5; color: var(--ink); text-wrap: pretty; }
.review-status {
  font-size: 12px; font-weight: 700;
  padding: 4px 10px; border-radius: 999px;
  flex-shrink: 0;
}
.review-status.ok { background: var(--correct-soft); color: var(--correct); }
.review-status.ng { background: var(--wrong-soft); color: var(--wrong); }
.review-caret { color: var(--ink-mute); transition: transform 200ms; }
.review-item.open .review-caret { transform: rotate(180deg); }

.review-body {
  margin-top: 16px; padding-top: 18px;
  border-top: 1px dashed var(--line);
  display: grid; gap: 12px;
}
.review-choices { display: flex; flex-direction: column; gap: 8px; }
.review-choice {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; border-radius: 10px;
  font-size: 13px; line-height: 1.5;
  background: var(--bg-soft);
  border: 1px solid transparent;
}
.review-choice.correct {
  background: var(--correct-soft);
  border-color: color-mix(in oklab, var(--correct) 40%, transparent);
  color: var(--correct);
  font-weight: 600;
}
.review-choice.user-wrong {
  background: var(--wrong-soft);
  border-color: color-mix(in oklab, var(--wrong) 40%, transparent);
  color: var(--wrong);
  font-weight: 600;
  text-decoration: line-through;
  text-decoration-color: color-mix(in oklab, var(--wrong) 50%, transparent);
}
.review-choice .rc-letter {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--card);
  display: flex; align-items: center; justify-content: center;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px; font-weight: 700;
  flex-shrink: 0;
}
.review-choice .rc-mark {
  margin-left: auto;
  font-size: 15px; font-weight: 700;
}
.explanation {
  background: var(--bg-soft);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 14px 16px;
  font-size: 13px; line-height: 1.7; color: var(--ink-soft);
}
.explanation strong { color: var(--accent-deep); font-weight: 700; display: block; margin-bottom: 4px; font-size: 12px; letter-spacing: 0.04em; text-transform: uppercase; }

/* --- Start confirm card --- */
.start-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  max-width: 500px;
  margin: 80px auto;
  overflow: hidden;
}
.start-card-head {
  padding: 32px 36px 20px;
  background: linear-gradient(135deg, var(--accent-soft), var(--card));
}
.start-card-head .exam-badge { width: 56px; height: 56px; font-size: 15px; margin-bottom: 18px; }
.start-card-head h2 { margin: 0 0 6px; font-size: 22px; font-weight: 800; letter-spacing: -0.015em; }
.start-card-head p { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.6; }
.start-card-body { padding: 24px 36px 32px; }
.start-info { display: flex; gap: 24px; margin-bottom: 24px; }
.start-info-item { flex: 1; }
.start-info-item .lab { font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-mute); font-weight: 700; margin-bottom: 4px; }
.start-info-item .val { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }

/* --- Tweaks panel --- */
.tweaks-panel {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
  box-shadow: var(--shadow-lg);
  z-index: 50;
  min-width: 240px;
  display: none;
}
.tweaks-panel.visible { display: block; }
.tweaks-panel h4 {
  margin: 0 0 14px; font-size: 12px; font-weight: 800;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-mute);
  display: flex; align-items: center; gap: 8px;
}
.tweaks-panel h4 .dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
}
.tweak-row { display: flex; flex-direction: column; gap: 8px; }
.tweak-label { font-size: 12px; font-weight: 600; color: var(--ink-soft); }
.theme-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.theme-swatch {
  background: var(--card); border: 2px solid var(--line);
  border-radius: 10px; padding: 10px;
  cursor: pointer; text-align: left;
  transition: all 140ms;
}
.theme-swatch:hover { border-color: var(--ink-mute); }
.theme-swatch.on { border-color: var(--ink); }
.theme-swatch .sw { display: flex; gap: 3px; margin-bottom: 6px; }
.theme-swatch .sw span { width: 16px; height: 16px; border-radius: 4px; }
.theme-swatch .name { font-size: 11px; font-weight: 700; color: var(--ink); }

/* --- Breadcrumb --- */
.breadcrumb {
  color: var(--ink-mute); font-size: 13px;
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.breadcrumb .crumb { color: var(--ink-soft); }
.breadcrumb .sep { opacity: 0.5; }

/* --- Mode selector (menu) --- */
.mode-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.mode-btn {
  background: var(--bg-soft);
  border: 2px solid var(--line-soft);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  cursor: pointer;
  text-align: left;
  transition: all 160ms ease;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.mode-btn:hover {
  border-color: var(--accent);
  background: color-mix(in oklab, var(--accent) 5%, var(--card));
}
.mode-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent);
}
.mode-btn-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 6px;
}
.mode-btn.active .mode-btn-label { color: var(--accent-deep); }
.mode-btn-desc {
  font-size: 12px;
  color: var(--ink-mute);
  line-height: 1.5;
}

/* --- Flash mode (一問一答) feedback --- */
.flash-feedback {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px dashed var(--line);
  animation: fadeSlide 280ms ease;
}
.flash-verdict {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.flash-verdict.ok { background: var(--correct-soft); color: var(--correct); }
.flash-verdict.ng { background: var(--wrong-soft);   color: var(--wrong);   }

.choices.flash-revealed .choice { pointer-events: none; }
.choices.flash-revealed .choice:not(.flash-correct):not(.flash-wrong) { opacity: 0.4; }

.choice.flash-correct {
  background: var(--correct-soft);
  border-color: var(--correct);
}
.choice.flash-correct .choice-letter {
  background: var(--correct);
  border-color: var(--correct);
  color: #fff;
}
.choice.flash-wrong {
  background: var(--wrong-soft);
  border-color: var(--wrong);
  text-decoration: line-through;
  text-decoration-color: color-mix(in oklab, var(--wrong) 50%, transparent);
}
.choice.flash-wrong .choice-letter {
  background: var(--wrong);
  border-color: var(--wrong);
  color: #fff;
}

/* --- Site footer --- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 24px;
  text-align: center;
  color: var(--ink-mute);
  font-size: 12px;
  line-height: 1.9;
}
.site-footer .footer-inner {
  max-width: 1160px;
  margin: 0 auto;
}
.site-footer a {
  color: var(--ink-mute);
  text-decoration: none;
}
.site-footer a:hover {
  color: var(--ink-soft);
  text-decoration: underline;
}

/* --- Utility --- */
@media (max-width: 600px) {
  .hero h1 { font-size: 30px; }
  .container, .result-wrap, .test-container { padding: 24px 16px 100px; }
  .topbar-inner, .test-topbar-inner { padding: 14px 16px; }
  .question-box { padding: 24px 20px; }
  .result-score { gap: 24px; flex-direction: column; }
  .result-hero { padding: 32px 24px; }
}