:root {
  color-scheme: light;
  --color-bg: #f6f8f7;
  --color-panel: #ffffff;
  --color-ink: #111c17;
  /* #68756e だと --color-soft の上で4.32:1しかなく、12pxの文字がWCAG 1.4.3を満たさない。 */
  --color-muted: #65716b;
  --color-border: #d6dfda;
  --color-soft: #eef4f1;
  --color-primary: #0b774b;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #e2f4ec;
  /* #a66413 だと --color-warning-soft の上で4.35:1。段階表示の文字が12pxなので4.5:1へ上げる。 */
  --color-warning: #a16112;
  --color-warning-soft: #fff5dd;
  --color-info: #245fa5;
  --color-info-soft: #e9f2ff;
  --color-danger: #b0342b;
  --color-danger-soft: #fff0ee;
  --shadow-panel: 0 20px 60px rgba(17, 28, 23, 0.1);
  --shadow-control: 0 8px 24px rgba(17, 28, 23, 0.08);
  --radius: 8px;
  font-family:
    "Yu Gothic", "Yu Gothic UI", "Hiragino Kaku Gothic ProN", "Meiryo", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background:
    linear-gradient(180deg, #ffffff 0, #f6f8f7 42%, #f1f6f4 100%);
  color: var(--color-ink);
}

button {
  font: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(37, 99, 165, 0.36);
  outline-offset: 3px;
}

.app-shell {
  min-height: 100vh;
}

.page-frame {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 18px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 18px;
  line-height: 1.2;
}

.brand small {
  margin-top: 3px;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.4;
}

.topbar-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-soft);
  color: var(--color-muted);
  font-size: 12px;
  white-space: nowrap;
}

/*
 * 「誰として利用中か」とログアウト（完成Gate C4-6 / C4-5）。
 * 共有端末での取り違えに気付けるよう、全画面のヘッダーへ常に置く。
 * 狭い画面では表示名を省略記号で切り、ログアウトは押せる大きさ（44px）を保つ。
 */
.identity {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  font-size: 12px;
  color: var(--color-muted);
}
.identity-label {
  flex: none;
}
.identity-name {
  overflow: hidden;
  color: var(--color-text);
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.identity-signout {
  flex: none;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--color-muted);
  font: inherit;
  cursor: pointer;
}
.identity-signout:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.identity-signout:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

@media (max-width: 420px) {
  /* 幅375pxでもブランドと利用者名が同じ行に収まるようにする。 */
  .identity-label {
    display: none;
  }
  .identity-name {
    max-width: 7em;
  }
}

.topbar-status strong {
  color: var(--color-primary);
}

.workspace {
  display: grid;
  gap: 18px;
}

.quiz-layout {
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
}

.start-layout {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
}

.result-layout {
  justify-items: center;
}

.intro-panel,
.quiz-panel,
.progress-panel,
.result-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.intro-panel,
.quiz-panel,
.result-panel {
  padding: 24px;
}

.progress-panel {
  align-self: start;
  padding: 18px;
}

.section-heading {
  margin-bottom: 22px;
}

.section-heading h1,
.section-heading h2,
.question-copy h1 {
  margin: 0;
  color: var(--color-ink);
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.18;
  letter-spacing: 0;
}

.section-heading h2 {
  font-size: 22px;
}

.section-heading p,
.question-copy p {
  margin: 10px 0 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.75;
}

.section-heading--compact {
  margin-bottom: 12px;
}

.control-group {
  display: grid;
  gap: 10px;
  padding: 14px 0;
  border-top: 1px solid var(--color-border);
}

.control-group--compact {
  padding: 14px 0;
}

.control-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.control-label span,
.mini-label {
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
}

.control-label small {
  color: var(--color-muted);
  font-size: 12px;
}

.segmented-control {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.segmented-control--wrap {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.stepper {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) 56px;
  gap: 8px;
  align-items: stretch;
}

.stepper-button {
  min-height: 52px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #f7faf8;
  color: var(--color-ink);
  font-size: 24px;
  font-weight: 700;
  cursor: pointer;
}

.stepper-button:disabled {
  opacity: 0.4;
  cursor: default;
}

.stepper-value {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-panel);
  font-size: 20px;
  font-weight: 700;
}

.save-default {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  margin-top: 6px;
  color: var(--color-ink);
  font-size: 15px;
  cursor: pointer;
}

.save-default input {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.form-notice {
  margin: 18px 0 4px;
  padding: 14px 16px;
  border: 1px solid rgba(176, 52, 43, 0.32);
  border-radius: var(--radius);
  background: var(--color-danger-soft);
}

.form-notice strong,
.form-notice p {
  display: block;
}

.history-panel {
  grid-column: 1 / -1;
  border-top: 1px solid var(--color-border);
  padding-top: 22px;
}

.history-list {
  display: grid;
  gap: 8px;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 0;
  border-top: 1px solid var(--color-border);
}

.history-item > div {
  display: grid;
  gap: 4px;
}

.history-item > div:last-child {
  justify-items: end;
}

.history-item span,
.history-empty {
  color: var(--color-muted);
  font-size: 13px;
}

.history-empty {
  margin: 0;
}

.form-notice strong {
  color: var(--color-danger);
  font-size: 14px;
}

.form-notice p {
  margin: 6px 0 0;
  color: var(--color-ink);
  font-size: 14px;
  line-height: 1.6;
}

.segmented-button,
.secondary-action,
.primary-action {
  min-height: 46px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    border-color 160ms ease,
    background 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.segmented-button {
  padding: 0 12px;
  background: var(--color-soft);
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 700;
}

.segmented-button:hover,
.secondary-action:hover,
.primary-action:hover {
  transform: translateY(-1px);
}

.segmented-button[aria-pressed="true"] {
  border-color: rgba(17, 102, 63, 0.3);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.primary-action,
.secondary-action {
  padding: 0 18px;
  font-size: 15px;
  font-weight: 800;
}

.primary-action {
  width: 100%;
  margin-top: 18px;
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.primary-action:disabled {
  border-color: var(--color-border);
  background: #dbe2de;
  color: #7b8781;
  cursor: not-allowed;
  transform: none;
}

.secondary-action {
  background: var(--color-panel);
  color: var(--color-ink);
}

.metric-row,
.result-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.metric-row span {
  color: var(--color-muted);
  font-size: 13px;
}

.metric-row strong {
  font-size: 24px;
}

.progress-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.progress-summary > div {
  min-width: 0;
}

.progress-summary span,
.progress-summary strong {
  display: block;
}

.progress-summary span {
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 700;
}

.progress-summary strong {
  margin-top: 4px;
  font-size: 18px;
  line-height: 1.2;
}

.preview-stack,
.review-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.preview-stack > div,
.result-grid > div,
.review-item,
.progress-item {
  border: 1px solid transparent;
  border-top-color: var(--color-border);
  border-radius: 0;
  background: transparent;
  padding: 12px;
}

.preview-stack > div:first-child,
.review-item:first-of-type {
  border-top-color: transparent;
}

.preview-stack strong,
.result-grid strong {
  display: block;
  margin-top: 4px;
  font-size: 15px;
  line-height: 1.45;
}

.quiz-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.quiz-meta span {
  min-height: 30px;
  padding: 6px 9px;
  border-radius: var(--radius);
  background: var(--color-info-soft);
  color: var(--color-info);
  font-size: 12px;
  font-weight: 800;
}

.question-copy {
  margin-bottom: 22px;
}

.answer-list {
  display: grid;
  gap: 10px;
}

.answer-option {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 64px;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-panel);
  color: var(--color-ink);
  text-align: left;
  cursor: pointer;
}

.answer-option span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: var(--radius);
  background: var(--color-soft);
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 900;
}

.answer-option strong {
  font-size: 15px;
  line-height: 1.55;
}

.answer-option.is-selected {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.answer-option.is-selected span {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.answer-option.is-correct {
  border-color: rgba(17, 102, 63, 0.35);
  background: var(--color-primary-soft);
}

.answer-option.is-wrong {
  border-color: rgba(163, 58, 49, 0.35);
  background: var(--color-danger-soft);
}

.answer-option:disabled {
  cursor: default;
}

.feedback {
  margin-top: 16px;
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.feedback strong {
  display: block;
  margin-bottom: 6px;
}

.feedback p {
  margin: 6px 0 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.65;
}

.feedback.is-correct {
  border-color: rgba(17, 102, 63, 0.35);
  background: var(--color-primary-soft);
}

.feedback.is-wrong {
  border-color: rgba(183, 121, 31, 0.35);
  background: var(--color-warning-soft);
}

.action-row {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 10px;
  margin-top: 18px;
}

.action-row .primary-action {
  margin-top: 0;
}

.meter {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--color-soft);
  margin-bottom: 16px;
}

.meter span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--color-primary);
}

.progress-item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
}

.progress-item span {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: var(--radius);
  background: var(--color-panel);
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 900;
}

.progress-item strong,
.progress-item small {
  font-size: 13px;
}

.progress-item small {
  color: var(--color-muted);
}

.progress-item.is-current {
  border-top-color: rgba(37, 99, 165, 0.28);
  background: var(--color-info-soft);
}

.result-panel {
  display: grid;
  width: 100%;
  max-width: 1040px;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  gap: 26px;
}

.result-summary {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.score-ring {
  display: grid;
  width: 150px;
  height: 150px;
  align-self: start;
  place-items: center;
  border: 10px solid var(--color-primary-soft);
  border-radius: 50%;
  background: var(--color-panel);
  box-shadow: inset 0 0 0 1px rgba(17, 102, 63, 0.16);
}

.score-ring strong,
.score-ring span {
  grid-column: 1;
  grid-row: 1;
}

.score-ring strong {
  transform: translateY(-10px);
  color: var(--color-primary);
  font-size: 34px;
  line-height: 1;
}

.score-ring span {
  transform: translateY(24px);
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 800;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-bottom: 0;
  padding-bottom: 0;
  margin-bottom: 0;
}

.next-preference-panel {
  align-self: start;
  border-top: 1px solid var(--color-border);
  padding-top: 18px;
}

.next-preference-panel .action-row {
  margin-top: 8px;
}

.result-review-list {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: start;
  margin-top: 0;
  border-left: 1px solid var(--color-border);
  padding-left: 22px;
}

.review-list p {
  margin: 8px 0 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.6;
}

.review-item strong {
  display: block;
  color: var(--color-warning);
}

@media (max-width: 860px) {
  .start-layout,
  .quiz-layout {
    grid-template-columns: 1fr;
  }

  .result-panel {
    grid-template-columns: 1fr;
  }

  .result-summary {
    grid-template-columns: 150px minmax(0, 1fr);
  }

  .score-ring,
  .result-review-list {
    grid-column: auto;
  }

  .result-review-list {
    grid-row: auto;
    border-left: 0;
    border-top: 1px solid var(--color-border);
    padding-left: 0;
    padding-top: 18px;
  }
}

@media (max-width: 540px) {
  .page-frame {
    padding: 12px;
  }

  .topbar {
    align-items: flex-start;
  }

  .brand small {
    display: none;
  }

  .topbar-status {
    min-height: 32px;
    font-size: 11px;
  }

  .intro-panel,
  .quiz-panel,
  .result-panel {
    padding: 16px;
  }

  .section-heading h1,
  .question-copy h1 {
    font-size: 24px;
  }

  .section-heading h2 {
    font-size: 20px;
  }

  .segmented-control,
  .segmented-control--wrap,
  .action-row,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .result-summary {
    grid-template-columns: 1fr;
  }

  .history-item {
    align-items: flex-start;
    flex-direction: column;
  }

  .history-item > div:last-child {
    justify-items: start;
  }

  .control-label {
    display: grid;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

.page-frame {
  width: min(1180px, 100%);
  padding: 24px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  margin: 0 -8px 18px;
  padding: 10px 8px 16px;
  background: rgba(246, 248, 247, 0.9);
  backdrop-filter: blur(12px);
}

.brand {
  gap: 14px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  border: 0;
  background: linear-gradient(145deg, #0b774b, #095f3c);
  box-shadow: 0 14px 34px rgba(11, 119, 75, 0.28);
  font-size: 20px;
}

.brand strong {
  font-size: 21px;
}

.brand small {
  color: #55665d;
  font-size: 13px;
}

.topbar-status {
  min-height: 40px;
  border-color: rgba(11, 119, 75, 0.18);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 8px 28px rgba(17, 28, 23, 0.06);
}

.workspace {
  gap: 22px;
}

.quiz-layout {
  grid-template-columns: minmax(0, 1fr) minmax(330px, 0.52fr);
  align-items: start;
}

.intro-panel,
.quiz-panel,
.progress-panel,
.result-panel {
  border-color: rgba(17, 28, 23, 0.1);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-panel);
}

.intro-panel,
.quiz-panel,
.result-panel {
  padding: 28px;
}

.progress-panel {
  padding: 22px;
}

.start-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: -8px -8px 8px;
  padding: 22px 28px;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(11, 119, 75, 0.12), rgba(36, 95, 165, 0.08)),
    #ffffff;
  border: 1px solid rgba(11, 119, 75, 0.12);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  margin-bottom: 10px;
  color: var(--color-info);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
}

.hero-copy h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.16;
  letter-spacing: 0;
}

.hero-copy p {
  max-width: 640px;
  margin: 10px 0 0;
  color: #51635a;
  font-size: 16px;
  line-height: 1.75;
}

.control-group {
  border-top-color: rgba(17, 28, 23, 0.09);
}

.control-group--first {
  border-top: 0;
}

.control-label span,
.mini-label {
  color: #4e5f56;
  font-size: 12px;
}

.segmented-button,
.secondary-action,
.primary-action,
.answer-option {
  border-color: rgba(17, 28, 23, 0.12);
  box-shadow: none;
}

.segmented-button {
  min-height: 52px;
  background: #f7faf8;
}

.segmented-button[aria-pressed="true"] {
  border-color: rgba(11, 119, 75, 0.34);
  background: var(--color-primary-soft);
  box-shadow: 0 10px 24px rgba(11, 119, 75, 0.1);
}

.primary-action {
  min-height: 56px;
  border: 0;
  background: linear-gradient(180deg, #0c8252, #096b43);
  box-shadow: 0 16px 30px rgba(11, 119, 75, 0.24);
  font-size: 16px;
}

.secondary-action {
  min-height: 56px;
  background: #ffffff;
}

.quiz-panel {
  padding: 30px;
}

.quiz-meta {
  margin-bottom: 22px;
}

.quiz-meta span {
  min-height: 34px;
  padding: 8px 11px;
  background: #edf5ff;
  color: var(--color-info);
}

.quiz-meta .quiz-count {
  background: #10251b;
  color: #ffffff;
}

.question-copy h1 {
  max-width: 760px;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.2;
}

.answer-list {
  gap: 12px;
}

.answer-option {
  min-height: 72px;
  padding: 16px;
  background: #ffffff;
  box-shadow: 0 8px 22px rgba(17, 28, 23, 0.05);
}

.answer-option span {
  width: 40px;
  height: 40px;
  background: #f2f6f4;
  color: #506158;
}

.answer-option strong {
  font-size: 16px;
}

.answer-option:hover {
  border-color: rgba(11, 119, 75, 0.28);
  transform: translateY(-1px);
}

.answer-option.is-selected {
  border-color: rgba(11, 119, 75, 0.45);
  background: #f1fbf6;
}

.answer-option.is-correct {
  border-color: rgba(11, 119, 75, 0.45);
  background: #eefaf4;
}

.answer-option.is-wrong {
  border-color: rgba(176, 52, 43, 0.32);
  background: #fff3f1;
}

.progress-panel {
  position: sticky;
  top: 94px;
}

.progress-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.progress-heading .eyebrow {
  margin: 0;
}

.progress-heading strong {
  font-size: 28px;
}

.meter {
  height: 10px;
  background: #e8efeb;
}

.progress-summary {
  gap: 10px;
}

.progress-summary > div {
  padding: 12px;
  border: 1px solid rgba(17, 28, 23, 0.08);
  border-radius: var(--radius);
  background: #f8fbf9;
}

.progress-item {
  padding: 14px 12px;
}

.progress-item.is-current {
  border-top-color: transparent;
  background: #edf5ff;
}

.feedback {
  display: grid;
  grid-template-columns: minmax(130px, 0.35fr) minmax(0, 1fr);
  gap: 16px;
  margin-top: 20px;
  padding: 18px;
}

.feedback-status {
  padding: 16px;
  border-radius: var(--radius);
  color: #ffffff;
}

.feedback-status span,
.feedback-status strong {
  display: block;
}

.feedback-status span {
  font-size: 12px;
  font-weight: 900;
}

.feedback-status strong {
  margin-top: 8px;
  font-size: 18px;
  line-height: 1.35;
}

.feedback.is-correct .feedback-status {
  background: var(--color-primary);
}

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

.feedback-body {
  min-width: 0;
}

.feedback-body strong {
  display: block;
  margin-top: 4px;
  font-size: 22px;
}

.result-panel {
  grid-template-columns: minmax(0, 1.05fr) minmax(330px, 0.65fr);
  gap: 30px;
  padding: 30px;
}

.result-summary {
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 24px;
}

.score-ring {
  width: 170px;
  height: 170px;
  border-width: 12px;
  background:
    radial-gradient(circle at center, #ffffff 58%, transparent 59%),
    conic-gradient(var(--color-primary) 0deg, var(--color-primary-soft) 0deg 360deg);
}

.score-ring strong {
  font-size: 40px;
}

.next-preference-panel {
  margin-top: 8px;
  padding-top: 22px;
}

.result-review-list {
  padding-left: 26px;
}

.review-item {
  padding: 16px 0;
}

.review-item strong {
  color: var(--color-warning);
  font-size: 15px;
}

@media (max-width: 860px) {
  .page-frame {
    padding: 14px 12px 20px;
  }

  .topbar {
    position: static;
    margin: 0 0 14px;
    padding: 8px 0 12px;
  }

  .start-layout,
  .quiz-layout {
    grid-template-columns: 1fr;
  }

  .progress-panel {
    position: static;
  }

  .start-hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 22px;
  }

  .quiz-panel {
    order: -1;
  }

  .progress-panel {
    order: 0;
  }

  .result-panel {
    grid-template-columns: 1fr;
  }

  .result-review-list {
    border-left: 0;
    border-top: 1px solid var(--color-border);
    padding-left: 0;
    padding-top: 18px;
  }
}

@media (max-width: 540px) {
  .brand-mark {
    width: 42px;
    height: 42px;
  }

  .brand strong {
    font-size: 19px;
  }

  .topbar-status {
    min-height: 36px;
  }

  .intro-panel,
  .quiz-panel,
  .result-panel {
    padding: 18px;
  }

  .start-hero {
    margin: -4px -4px 6px;
    padding: 18px;
  }

  .hero-copy h1 {
    font-size: 26px;
  }

  .hero-copy p {
    font-size: 14px;
  }

  .question-copy h1 {
    font-size: 28px;
  }

  .answer-option {
    min-height: 72px;
    padding: 14px;
  }

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

  .result-summary {
    grid-template-columns: 1fr;
  }

  .score-ring {
    width: 150px;
    height: 150px;
  }
}

/*
 * 目安時間の帯（完成Gate C2-6 / C2-7、完成条件正本 §3.5 / §3.6）。
 *
 * オーナー決定の「面白味のあるアニメーションで分かりやすく」を、塗装ロボらしい
 * 「刷毛のひと塗りが進む」帯で表す。**締め切りの表現にはしない。**
 *
 * 進行は CSSアニメーション＋負の animation-delay（`--budget-delay`）で描く。
 * 画面は状態が変わるたび全体を描き直すので、幅をJSで持つと選択肢を押した瞬間に帯が戻る。
 * 負のdelayなら、作り直された要素が「すでに経過した分だけ進んだ状態」から始まる。
 *
 * 超過後（data-phase="over"）は帯を止め、静かな色へ落とす。
 * **赤の点滅・音・振動は使わない。** 急かす表現にすると、ソフトタイマーの意味が失われる。
 */
.budget {
  margin-bottom: 18px;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-panel);
}

.budget-track {
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--color-soft);
}

.budget-brush {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(var(--budget-ratio, 0));
  transform-origin: left center;
  border-radius: inherit;
  /* 刷毛の毛筋。塗り進んでいる感じを出すための細い縞。 */
  background-image:
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.22) 0 2px,
      rgba(255, 255, 255, 0) 2px 6px
    ),
    linear-gradient(90deg, var(--budget-tint-from, #0b774b), var(--budget-tint-to, #159a63));
}

.budget[data-animated="true"] .budget-brush {
  animation:
    budget-sweep var(--budget-duration, 60s) linear both,
    budget-tint var(--budget-duration, 60s) linear both;
  animation-delay: var(--budget-delay, 0s);
}

@keyframes budget-sweep {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

/* 残りが少なくなったら色が静かに変わる（点滅させない）。 */
@keyframes budget-tint {
  0%,
  69.9% {
    --budget-tint-from: #0b774b;
    --budget-tint-to: #159a63;
  }
  70%,
  100% {
    --budget-tint-from: #a66413;
    --budget-tint-to: #c07d22;
  }
}

.budget[data-phase="soon"] .budget-brush {
  --budget-tint-from: #a66413;
  --budget-tint-to: #c07d22;
}

/* 超過後は動かさず、主張しない色へ落とす。 */
.budget[data-phase="over"] .budget-brush {
  --budget-tint-from: #68756e;
  --budget-tint-to: #7d8b83;
  background-image: linear-gradient(90deg, var(--budget-tint-from), var(--budget-tint-to));
}

.budget-readout {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  margin-top: 10px;
}

.budget-budget {
  font-size: 15px;
  font-weight: 800;
}

.budget-phase {
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 800;
}

.budget[data-phase="soon"] .budget-phase {
  background: var(--color-warning-soft);
  color: var(--color-warning);
}

.budget[data-phase="over"] .budget-phase {
  background: var(--color-soft);
  color: var(--color-muted);
}

.budget-elapsed {
  margin-left: auto;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 700;
  /* 秒ごとに数字が動いても行が揺れないようにする。 */
  font-variant-numeric: tabular-nums;
}

.budget-note {
  margin: 8px 0 0;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.6;
}

/*
 * 動きを減らす設定（WCAG 2.2 SC 2.2.2 Pause, Stop, Hide）。
 *
 * 上の全体指定は animation-duration を 0.01ms にするため、そのままだと帯が一瞬で
 * 満了状態（＝いつでも「超過」の見た目）になる。ここで明示的に止め、
 * **経過した分だけ塗られた静止画**へ差し替える。数値と段階表示が主役になる。
 */
@media (prefers-reduced-motion: reduce) {
  .budget .budget-brush,
  .budget[data-animated="true"] .budget-brush {
    animation: none !important;
    transform: scaleX(var(--budget-ratio, 0));
  }
}

@media (max-width: 540px) {
  .budget {
    padding: 10px 12px;
  }

  .budget-elapsed {
    margin-left: 0;
  }
}

/*
 * 時間の表示設定（完成Gate C2-8）。
 * WCAG 2.2 SC 2.2.1（Timing Adjustable, Level A）の turn off はここで選ぶ。
 * 押した時点で保存するので、保存ボタンは置かない。
 */
.timer-multiplier {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
}

.timer-note {
  margin: 8px 0 0;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.6;
}

/*
 * 開始前の在庫表示（完成Gate C2-10）。
 * 押してから409で断られるのではなく、選ぶ前に何問できるかを示す。
 * 不足していても開始ボタンは無効化しない（判定はサーバーが持つ）。
 */
.availability {
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-soft);
}

.availability-headline {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
}

.availability-headline strong {
  font-size: 16px;
}

/* 足りないことは目立たせるが、責める色にはしない。 */
.availability-headline.is-short {
  color: var(--color-warning);
}

.availability-detail {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin-top: 8px;
  color: var(--color-muted);
  font-size: 12px;
}

.availability-note {
  margin: 8px 0 0;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.6;
}

/*
 * 折りたたむ設定（完成Gate C2-2）。
 * 常時展開すると 375×667 の画面で開始ボタンが初期表示の外へ出る。
 * `details` なのでキーボードでも読み上げでも到達できる。
 */
.control-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 10px;
  /* タップ対象を44px以上にする。summary の既定の高さは文字だけで決まる。 */
  min-height: 44px;
  padding: 10px 0;
  cursor: pointer;
  font-size: 14px;
  font-weight: 800;
}

.control-summary small {
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 700;
}

.control-summary:focus-visible {
  outline: 3px solid rgba(37, 99, 165, 0.36);
  outline-offset: 3px;
}

.timer-panel[open] .control-summary {
  margin-bottom: 4px;
}

/* カテゴリ8件を表示しても、最初の画面から開始できるようにする。 */
.start-layout .intro-panel {
  padding-bottom: calc(100px + env(safe-area-inset-bottom, 0px));
}

.start-layout .intro-panel > .primary-action {
  position: fixed;
  z-index: 10;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(12px + env(safe-area-inset-bottom, 0px));
  width: min(802px, calc(100% - 48px));
  box-shadow: 0 0 0 10px var(--color-surface, #fff), 0 -8px 24px rgba(0, 0, 0, 0.12);
}