:root {
  --bg: #f4efe6;
  --panel: rgba(255, 251, 245, 0.9);
  --panel-strong: #fffaf1;
  --text: #1e1c1a;
  --muted: #675f57;
  --line: rgba(61, 46, 33, 0.12);
  --accent: #0f6d5a;
  --accent-soft: #daf2e8;
  --accent-strong: #094f42;
  --warm: #d9732b;
  --danger: #b84747;
  --shadow: 0 24px 60px rgba(73, 55, 35, 0.12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Yu Gothic UI", "Hiragino Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(243, 193, 113, 0.38), transparent 30%),
    radial-gradient(circle at top right, rgba(15, 109, 90, 0.18), transparent 28%),
    linear-gradient(180deg, #f8f2e9 0%, var(--bg) 100%);
}

.app-shell {
  width: min(980px, calc(100% - 24px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.hero {
  padding: 12px 6px 22px;
}

.eyebrow,
.panel-kicker,
.summary-label {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
  color: var(--muted);
}

.hero h1 {
  margin: 6px 0 10px;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 0.95;
}

.hero-copy {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.screen-stack {
  display: grid;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  padding: 24px;
  backdrop-filter: blur(12px);
}

.hidden {
  display: none;
}

.is-plan-locked {
  opacity: 0.52;
}

.mode-card.is-plan-locked {
  border-style: dashed;
}

.panel-header h2,
.question-title,
.section-title {
  margin: 8px 0 0;
}

.plan-selector-panel {
  margin: 0 0 20px;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(15, 109, 90, 0.18);
  background: rgba(255, 255, 255, 0.6);
}

.plan-selector-panel h3 {
  margin: 6px 0;
}

.premium-upsell-panel {
  margin: 0 0 20px;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(179, 89, 0, 0.18);
  background: linear-gradient(135deg, rgba(255, 246, 230, 0.98) 0%, rgba(255, 252, 245, 0.98) 100%);
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

.premium-upsell-panel h3 {
  margin: 6px 0;
}

.premium-upsell-actions {
  min-width: 240px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 12px;
}

.premium-price-note {
  color: var(--accent-strong);
  font-size: 14px;
}

.result-premium-panel {
  margin-top: 18px;
}

.plan-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.plan-button {
  border: 1px solid var(--line);
  background: #fffdf9;
  color: var(--text);
  border-radius: 999px;
  padding: 12px 14px;
  cursor: pointer;
  font-weight: 700;
}

.plan-button.is-active {
  border-color: rgba(15, 109, 90, 0.45);
  background: #e6f5ef;
  color: var(--accent-strong);
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 22px 0;
}

.mode-grid-wide {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.mode-card,
.choice-button,
.primary-button,
.secondary-button {
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease, background 160ms ease;
}

.mode-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel-strong);
  padding: 18px;
  text-align: left;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(73, 55, 35, 0.06);
}

.plan-pill {
  display: inline-flex;
  min-height: 28px;
  padding: 0 10px;
  align-items: center;
  border-radius: 999px;
  background: rgba(15, 109, 90, 0.1);
  color: var(--accent-strong);
  font-size: 0.76rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.mode-card:hover,
.choice-button:hover,
.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-1px);
}

.mode-card.is-active {
  border-color: rgba(15, 109, 90, 0.45);
  background: linear-gradient(180deg, #effaf5 0%, #e4f5ef 100%);
}

.mode-title {
  display: block;
  font-weight: 700;
  margin-bottom: 6px;
}

.mode-desc {
  display: block;
  color: var(--muted);
  line-height: 1.6;
}

.mode-lock-note {
  display: block;
  min-height: 20px;
  margin-top: 10px;
  font-size: 13px;
  color: #9b5a16;
}

.summary-strip,
.history-strip,
.quiz-topbar,
.meta-row,
.feedback-head,
.action-row,
.result-grid {
  display: flex;
  gap: 12px;
}

.summary-strip,
.history-strip,
.result-grid {
  flex-wrap: wrap;
}

.history-strip {
  margin: 10px 0 8px;
}

.history-card {
  flex: 1 1 180px;
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid var(--line);
}

.summary-strip {
  margin-bottom: 20px;
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.52);
  border: 1px solid var(--line);
  justify-content: space-between;
}

.summary-subtext {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}

.category-picker {
  margin: 8px 0 20px;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
}

.recommend-panel {
  margin: 0 0 20px;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(15, 109, 90, 0.2);
  background: linear-gradient(135deg, rgba(233, 248, 242, 0.96) 0%, rgba(255, 248, 236, 0.96) 100%);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.plan-panel {
  margin: 0 0 20px;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.56);
}

.picker-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: end;
  flex-wrap: wrap;
}

.picker-header h3 {
  margin: 6px 0 0;
}

.picker-copy {
  margin: 0;
  color: var(--muted);
}

.category-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.insight-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.plan-card {
  padding: 14px;
  border-radius: 18px;
  background: #fffdf8;
  border: 1px solid var(--line);
}

.plan-card strong,
.history-card strong {
  display: block;
  margin-top: 4px;
  font-size: 1.05rem;
}

.plan-card p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.stats-grid,
.session-list {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.stats-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stat-card,
.session-card {
  padding: 14px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fffdf8;
}

.stat-card strong,
.session-card strong {
  display: block;
  margin-top: 4px;
}

.stat-card p,
.session-card p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.category-button {
  border: 1px solid var(--line);
  background: #fffdf9;
  color: var(--text);
  border-radius: 999px;
  padding: 12px 14px;
  cursor: pointer;
  font-weight: 700;
}

.category-button.is-active {
  border-color: rgba(15, 109, 90, 0.45);
  background: #e6f5ef;
  color: var(--accent-strong);
}

.primary-button,
.secondary-button,
.ghost-button {
  border: none;
  border-radius: 999px;
  padding: 14px 20px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

.primary-button {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: white;
  box-shadow: 0 16px 28px rgba(15, 109, 90, 0.25);
}

.secondary-button {
  background: #efe6d9;
  color: var(--text);
}

.ghost-button {
  background: transparent;
  color: var(--accent-strong);
  border: 1px solid rgba(15, 109, 90, 0.28);
}

.quiz-topbar {
  justify-content: space-between;
  align-items: start;
}

.progress-text {
  margin: 0 0 8px;
  color: var(--muted);
}

.score-chip {
  min-width: 88px;
  padding: 12px 14px;
  border-radius: 18px;
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
}

.score-chip span {
  display: block;
  font-size: 0.72rem;
  color: var(--muted);
}

.score-chip strong {
  font-size: 1.35rem;
}

.meta-row {
  margin: 16px 0 18px;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  background: #e3f3ed;
  color: var(--accent-strong);
  font-weight: 700;
}

.badge-soft {
  background: #f3ebdf;
  color: #7a5838;
}

.mini-toggle-button {
  border: 1px solid rgba(15, 109, 90, 0.22);
  background: #fffefb;
  color: var(--accent-strong);
  border-radius: 999px;
  min-height: 36px;
  padding: 0 14px;
  font-weight: 700;
  cursor: pointer;
}

.mini-toggle-button.is-flagged {
  background: #fff1d8;
  color: #8a541c;
  border-color: rgba(217, 115, 43, 0.3);
}

.mini-toggle-button.is-priority-high {
  background: #ffe3db;
  color: #a23f2a;
  border-color: rgba(162, 63, 42, 0.28);
}

.choices {
  display: grid;
  gap: 12px;
}

.choice-button {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fffdf9;
  padding: 16px 18px;
  text-align: left;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1.6;
}

.choice-button.is-correct {
  border-color: rgba(15, 109, 90, 0.45);
  background: var(--accent-soft);
}

.choice-button.is-wrong {
  border-color: rgba(184, 71, 71, 0.4);
  background: rgba(184, 71, 71, 0.1);
}

.choice-button:disabled {
  cursor: default;
  opacity: 1;
}

.feedback-card {
  margin-top: 20px;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.65);
}

.feedback-head {
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.feedback-status {
  font-weight: 800;
  font-size: 1.05rem;
}

.feedback-status.is-correct {
  color: var(--accent-strong);
}

.feedback-status.is-wrong {
  color: var(--danger);
}

.memory-tip {
  padding: 8px 12px;
  border-radius: 999px;
  background: #fff2df;
  color: #8a541c;
  font-size: 0.92rem;
}

.feedback-explanation {
  line-height: 1.8;
  margin: 14px 0;
}

.option-reasons {
  display: grid;
  gap: 8px;
}

.option-reason {
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(244, 239, 230, 0.8);
  line-height: 1.6;
}

.reference-links {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.reference-links-title {
  display: block;
  margin-bottom: 10px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--muted);
}

.reference-links-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.reference-links-list li {
  color: var(--muted);
  line-height: 1.6;
}

.reference-link {
  color: var(--accent-strong);
  font-weight: 700;
  text-decoration: none;
}

.reference-link:hover {
  text-decoration: underline;
}

.reference-link-meta {
  margin-left: 6px;
  font-size: 0.92rem;
}

.action-row {
  margin-top: 18px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.result-card {
  flex: 1 1 200px;
  padding: 18px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--line);
}

.review-list {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.review-item {
  padding: 16px;
  border-radius: 18px;
  background: #fffdf9;
  border: 1px solid var(--line);
}

.review-item h4 {
  margin: 0 0 8px;
}

.review-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.resume-panel {
  margin: 0 0 20px;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(15, 109, 90, 0.18);
  background: linear-gradient(180deg, rgba(227, 243, 237, 0.95) 0%, rgba(244, 250, 247, 0.95) 100%);
}

.resume-panel h3 {
  margin: 6px 0;
}

.resume-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100%, calc(100% - 16px));
    padding-top: 12px;
  }

  .panel {
    padding: 18px;
    border-radius: 22px;
  }

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

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

  .insight-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .picker-header {
    flex-direction: column;
    align-items: start;
  }

  .recommend-panel {
    flex-direction: column;
    align-items: start;
  }

  .premium-upsell-panel {
    flex-direction: column;
    align-items: start;
  }

  .quiz-topbar,
  .feedback-head,
  .action-row {
    flex-direction: column;
  }

  .action-row .primary-button,
  .action-row .secondary-button,
  .action-row .ghost-button,
  .resume-actions .primary-button,
  .resume-actions .secondary-button {
    width: 100%;
  }
}