@import url("./src/theme/tokens.css");
@import url("./src/theme/motion.css");
@import url("./src/theme/accessibility.css");

:root {
  --reading-scale: 1;
  color-scheme: light;
  --ink-primary: #1d1a17;
  --ink-muted: #6d685f;
  --paper-primary: #f5f0e6;
  --paper-card: #e7d8bc;
  --cinnabar: #b64032;
  --mineral-blue: #3f6874;
  --mineral-green: #477362;
  --focus-ring: #f5f0e6;
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  background: var(--paper-primary);
  color: var(--ink-primary);
}

:root[data-reading-mode="plain"] {
  --paper-primary: #fff;
  --paper-card: #f8f8f6;
}

:root[data-reading-mode="night"] {
  color-scheme: dark;
  --ink-primary: #f3ead8;
  --ink-muted: #c8bca8;
  --paper-primary: #263746;
  --paper-card: #314553;
  --focus-ring: #263746;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 88% 12%, rgb(63 104 116 / 16%), transparent 34rem),
    linear-gradient(145deg, #f7f2e8, #e8ddca);
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10;
  padding: 0.6rem 0.9rem;
  transform: translateY(-200%);
  background: var(--ink-primary);
  color: var(--paper-primary);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  width: min(72rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.5rem 0;
}

.eyebrow,
.wordmark,
.chapter-label {
  margin: 0;
}

.eyebrow,
.chapter-label {
  color: var(--cinnabar);
  font-weight: 700;
  letter-spacing: 0.12em;
}

.wordmark {
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 1.25rem;
  font-weight: 800;
}

.site-header a {
  color: inherit;
  text-decoration: none;
}

.teacher-entry {
  padding: 0.45rem 0.75rem;
  border: 1px solid rgb(29 26 23 / 18%);
  border-radius: 999px;
  color: var(--ink-muted);
  font-size: 0.86rem;
}

main {
  min-height: calc(100vh - 6rem);
}

.paper-panel {
  width: min(42rem, 100%);
  padding: clamp(1.5rem, 5vw, 4rem);
  border: 1px solid rgb(29 26 23 / 16%);
  border-radius: 1.5rem 0.35rem 1.5rem 0.35rem;
  background: rgb(245 240 230 / 96%);
  box-shadow: 0 1.5rem 5rem rgb(38 55 70 / 12%);
}

h1 {
  max-width: 12ch;
  margin: 0.8rem 0 1.2rem;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: clamp(2.3rem, 8vw, 4.8rem);
  line-height: 1.15;
  text-wrap: balance;
}

p {
  font-size: 1.05rem;
  line-height: 1.8;
}

.privacy-note {
  padding-top: 1rem;
  border-top: 1px solid rgb(29 26 23 / 12%);
  color: var(--ink-muted);
  font-size: 0.92rem;
}

button,
a {
  font: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--ink-primary);
  outline-offset: 3px;
  box-shadow: 0 0 0 6px var(--focus-ring);
}

.home-view {
  width: min(76rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0 5rem;
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(18rem, 0.88fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  min-height: 32rem;
  padding: clamp(2rem, 6vw, 5rem);
  overflow: hidden;
  border: 1px solid rgb(29 26 23 / 14%);
  border-radius: 2rem 0.5rem 2rem 0.5rem;
  background: rgb(245 240 230 / 94%);
  box-shadow: 0 2rem 6rem rgb(38 55 70 / 13%);
}

.hero-copy h1 {
  max-width: 9ch;
}

.hero-lead {
  max-width: 34rem;
  color: #4f4a43;
  font-size: clamp(1.05rem, 2vw, 1.22rem);
}

.today-status {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.today-status span {
  padding: 0.45rem 0.75rem;
  border: 1px solid rgb(29 26 23 / 14%);
  border-radius: 999px;
  background: rgb(255 255 255 / 48%);
  color: #554f47;
  font-size: 0.88rem;
}

.floating-city-preview {
  position: relative;
  min-height: 22rem;
  isolation: isolate;
}

.hero-illustration {
  display: block;
  overflow: hidden;
  border: 1px solid rgb(29 26 23 / 12%);
  border-radius: 1.5rem 0.35rem;
  background: var(--paper-card);
  box-shadow: 0 1rem 3rem rgb(38 55 70 / 14%);
}

.hero-illustration img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.ink-moon {
  position: absolute;
  top: 0;
  right: 12%;
  width: 8.5rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: rgb(182 64 50 / 12%);
  box-shadow: inset 1.2rem -1rem 0 rgb(245 240 230 / 36%);
}

.mountain {
  position: absolute;
  right: -8%;
  bottom: 2rem;
  left: 4%;
  height: 15rem;
  clip-path: polygon(0 100%, 20% 35%, 36% 78%, 57% 9%, 78% 67%, 100% 27%, 100% 100%);
}

.mountain-back {
  opacity: 0.28;
  background: var(--mineral-blue);
  transform: translateY(-2rem);
}

.mountain-front {
  opacity: 0.82;
  background: linear-gradient(150deg, var(--ink-muted), var(--ink-primary));
}

.city-tower {
  position: absolute;
  right: 31%;
  bottom: 3.25rem;
  z-index: 2;
  width: 5.3rem;
  height: 8.4rem;
  clip-path: polygon(12% 100%, 12% 30%, 0 30%, 50% 0, 100% 30%, 88% 30%, 88% 100%);
  background: var(--paper-card);
  box-shadow: inset 0 -2.5rem 0 rgb(63 104 116 / 28%);
}

.city-light {
  position: absolute;
  bottom: 5.6rem;
  z-index: 3;
  width: 0.65rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: #d8a84d;
  box-shadow: 0 0 1.2rem #d8a84d;
}

.light-one {
  right: 39%;
}

.light-two {
  right: 34%;
}

.city-caption {
  position: absolute;
  right: 0;
  bottom: 0;
  color: var(--ink-muted);
  font-family: "Noto Serif TC", "Songti TC", serif;
  letter-spacing: 0.12em;
}

.route-section {
  padding-top: 5rem;
}

.section-heading {
  display: flex;
  gap: 2rem;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.section-heading h2,
.route-card h2 {
  margin: 0.25rem 0 0;
  font-family: "Noto Serif TC", "Songti TC", serif;
}

.section-heading > p {
  max-width: 30rem;
  color: var(--ink-muted);
}

.route-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.route-card {
  display: flex;
  min-width: 0;
  min-height: 28rem;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgb(29 26 23 / 14%);
  border-radius: 1.5rem 0.35rem 1.5rem 0.35rem;
  background: rgb(245 240 230 / 94%);
  box-shadow: 0 1.2rem 3rem rgb(38 55 70 / 8%);
}

.route-card__header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: stretch;
  min-height: 18rem;
  padding: 0.55rem;
  background: linear-gradient(145deg, rgb(63 104 116 / 13%), transparent);
}

.route-card__header > div {
  padding: 0.35rem 0.95rem 0.75rem;
}

.route-art {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 1.1rem 0.25rem;
  object-fit: cover;
  object-position: center;
  background:
    linear-gradient(145deg, rgb(63 104 116 / 15%), transparent),
    var(--paper-card);
}

.route-science .route-card__header {
  background: linear-gradient(145deg, rgb(71 115 98 / 16%), transparent);
}

.route-humanities .route-card__header {
  background: linear-gradient(145deg, rgb(194 146 61 / 18%), transparent);
}

.route-mark {
  display: grid;
  width: 4rem;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid currentcolor;
  border-radius: 50% 45% 52% 43%;
  color: var(--cinnabar);
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 1.55rem;
  font-weight: 800;
}

.route-mentor {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.route-card__body {
  flex: 1;
  padding: 1.5rem;
}

.route-question {
  margin-top: 1.4rem;
  padding-left: 1rem;
  border-left: 3px solid var(--cinnabar);
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-weight: 700;
}

.route-card__actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
  padding: 1rem 1.5rem 1.5rem;
}

.reading-journal {
  margin-top: var(--space-8);
}

.chapter-card {
  max-width: 42rem;
  padding: var(--space-5);
  border: 1px solid color-mix(in srgb, var(--color-ink) 18%, transparent);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--color-paper) 92%, var(--color-jade));
}

.chapter-card h3 {
  margin: 0.3rem 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.15rem);
}

.chapter-review,
.season-unlocked {
  display: inline-block;
  margin-top: var(--space-3);
  color: var(--color-cinnabar);
  font-weight: 800;
}

@media (pointer: coarse), (max-width: 820px) {
  button,
  .teacher-entry,
  .difficulty-button,
  .primary-action {
    min-height: 48px;
  }

  .difficulty-button,
  .primary-action {
    padding-inline: 1rem;
  }
}

.difficulty-button {
  min-height: 3.5rem;
  padding: 0.65rem;
  border: 1px solid rgb(29 26 23 / 24%);
  border-radius: 0.8rem 0.2rem 0.8rem 0.2rem;
  background: transparent;
  color: var(--ink-primary);
  cursor: pointer;
}

.review-shell {
  width: min(86rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 3rem) 0 5rem;
}

.review-shell.paper-panel {
  width: min(36rem, calc(100% - 2rem));
  padding: clamp(1.5rem, 5vw, 3rem);
}

.review-shell form {
  display: grid;
  gap: 1rem;
}

.review-shell label {
  display: grid;
  gap: 0.4rem;
  color: var(--ink-muted);
  font-weight: 700;
}

.review-shell input,
.review-shell select {
  min-height: 2.8rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid rgb(29 26 23 / 22%);
  border-radius: 0.5rem;
  background: rgb(255 255 255 / 58%);
  color: var(--ink-primary);
}

.review-shell button {
  min-height: 2.8rem;
  padding: 0.65rem 1rem;
  border: 1px solid rgb(29 26 23 / 24%);
  border-radius: 0.7rem 0.2rem;
  background: transparent;
  color: var(--ink-primary);
  cursor: pointer;
}

.review-shell .primary-action {
  border-color: var(--cinnabar);
  background: var(--cinnabar);
  color: #fff8ed;
  font-weight: 800;
}

.review-heading {
  display: flex;
  gap: 2rem;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.review-heading h1 {
  margin-bottom: 0;
  font-size: clamp(2.2rem, 5vw, 4rem);
}

.review-heading nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.review-heading nav a {
  padding: 0.5rem 0.75rem;
  border: 1px solid rgb(29 26 23 / 16%);
  border-radius: 999px;
  color: var(--ink-primary);
  text-decoration: none;
}

.review-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.review-detail {
  min-width: 0;
  padding: clamp(1rem, 3vw, 2rem);
  border: 1px solid rgb(29 26 23 / 16%);
  border-radius: 1.5rem 0.35rem;
  background: rgb(245 240 230 / 94%);
  box-shadow: 0 1.2rem 3rem rgb(38 55 70 / 8%);
}

.review-detail__header,
.review-columns,
.review-diff,
.review-actions {
  display: grid;
  gap: 1rem;
}

.review-detail__header {
  grid-template-columns: 1fr auto;
  align-items: start;
}

.review-detail__header h2 {
  margin: 0.35rem 0 0;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: clamp(1.5rem, 3vw, 2.4rem);
}

.quality-seal {
  display: grid;
  width: 4.5rem;
  aspect-ratio: 1;
  place-items: center;
  border: 2px solid var(--cinnabar);
  border-radius: 50%;
  color: var(--cinnabar);
  font-size: 1.4rem;
  font-weight: 900;
}

.quality-seal small {
  margin-top: -1rem;
  font-size: 0.65rem;
}

.review-columns {
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.9fr);
  margin-top: 1.5rem;
}

.review-question,
.student-preview,
.review-diff article {
  margin-top: 0.75rem;
  padding: 1rem;
  border: 1px solid rgb(29 26 23 / 12%);
  border-radius: 0.75rem;
  background: rgb(255 255 255 / 35%);
}

.preview-switch {
  display: flex;
  gap: 0.5rem;
}

.student-preview {
  margin-inline: auto;
  transition: max-width 160ms ease;
}

.student-preview--mobile {
  max-width: 22rem;
}

.student-preview--desktop {
  max-width: 100%;
}

.review-diff {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 1rem 0;
}

.review-diff .is-changed {
  border-color: var(--cinnabar);
}

.review-actions {
  grid-template-columns: minmax(10rem, 1fr) minmax(10rem, 1fr) auto auto;
  align-items: end;
  padding-top: 1rem;
  border-top: 1px solid rgb(29 26 23 / 12%);
}

.form-message {
  min-height: 1.8rem;
  color: var(--cinnabar);
  font-weight: 700;
}

.class-shell {
  margin-inline: auto;
}

.class-shell form {
  display: grid;
  gap: 1rem;
}

.landmark-level {
  display: grid;
  width: min(16rem, 100%);
  min-height: 8rem;
  margin: 1.5rem 0;
  place-items: center;
  border: 1px solid rgb(29 26 23 / 20%);
  border-radius: 50% 45% 52% 43%;
  background:
    radial-gradient(circle, rgb(71 115 98 / 22%), transparent 62%),
    rgb(255 255 255 / 35%);
  color: var(--mineral-green);
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 1.5rem;
  font-weight: 800;
}

@media (max-width: 60rem) {
  .review-pair,
  .review-columns {
    grid-template-columns: 1fr;
  }

  .review-actions {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 42rem) {
  .site-header {
    flex-wrap: wrap;
  }

  .review-heading {
    display: block;
  }

  .review-pair,
  .review-diff,
  .review-actions {
    grid-template-columns: 1fr;
  }
}

.difficulty-button:hover {
  border-color: var(--cinnabar);
  background: rgb(182 64 50 / 6%);
}

.difficulty-button span,
.difficulty-button small {
  display: block;
}

.difficulty-button span {
  font-weight: 800;
}

.difficulty-button small {
  margin-top: 0.2rem;
  color: var(--ink-muted);
}

.reading-view {
  min-height: calc(100vh - 6rem);
  background: var(--paper-primary);
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  width: 0;
  height: 3px;
  background: var(--cinnabar);
  transition: width 180ms ease;
}

.reading-layout {
  display: grid;
  grid-template-columns: minmax(9rem, 1fr) minmax(0, 45rem) minmax(11rem, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  width: min(86rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3rem 0 7rem;
}

.reading-side,
.reading-controls {
  position: sticky;
  top: 2rem;
  align-self: start;
}

.back-link {
  color: var(--ink-primary);
}

.reading-side .chapter-label {
  margin-top: 2.5rem;
}

.reading-difficulty {
  color: var(--ink-muted);
  font-weight: 700;
}

.reading-article {
  min-width: 0;
  padding: clamp(1.5rem, 4vw, 4rem);
  border: 1px solid rgb(109 104 95 / 20%);
  border-radius: 1.5rem 0.35rem 1.5rem 0.35rem;
  background: color-mix(in srgb, var(--paper-primary) 96%, white 4%);
  box-shadow: 0 1.5rem 5rem rgb(29 26 23 / 8%);
}

.reading-header {
  padding-bottom: 2rem;
  border-bottom: 1px solid rgb(109 104 95 / 20%);
}

.reading-header h1 {
  max-width: 14ch;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
}

.reading-meta {
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.reading-hook {
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--cinnabar);
  background: color-mix(in srgb, var(--paper-card) 55%, transparent);
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-weight: 700;
}

.reading-body {
  padding: 2rem 0;
}

.reading-paragraph {
  margin: 0 0 1.3em;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: calc(1.18rem * var(--reading-scale));
  font-weight: 450;
  line-height: 1.9;
  text-align: justify;
}

.glossary-panel,
.source-panel {
  margin-top: 2rem;
  padding: 1.25rem;
  border: 1px solid rgb(109 104 95 / 22%);
  border-radius: 0.9rem 0.25rem 0.9rem 0.25rem;
  background: var(--paper-card);
}

.glossary-panel h2,
.source-panel h2 {
  margin-top: 0;
  font-size: 1.05rem;
}

.source-panel a {
  color: var(--ink-primary);
  overflow-wrap: anywhere;
}

.primary-action {
  width: 100%;
  min-height: 3.8rem;
  margin-top: 2rem;
  border: 0;
  border-radius: 0.85rem 0.2rem 0.85rem 0.2rem;
  background: var(--cinnabar);
  color: #fff8eb;
  cursor: pointer;
  font-weight: 800;
}

.control-label {
  margin-top: 0;
  font-size: 0.85rem;
  font-weight: 800;
}

.mode-group,
.font-size-group {
  display: grid;
  gap: 0.45rem;
}

.font-size-group {
  grid-template-columns: 1fr 1fr;
  margin-top: 0.75rem;
}

.reading-controls button {
  min-height: 2.8rem;
  border: 1px solid rgb(109 104 95 / 30%);
  border-radius: 0.65rem 0.2rem 0.65rem 0.2rem;
  background: var(--paper-card);
  color: var(--ink-primary);
  cursor: pointer;
}

.reading-controls button[aria-pressed="true"] {
  border-color: var(--cinnabar);
  box-shadow: inset 4px 0 0 var(--cinnabar);
}

.assessment-view {
  width: min(58rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 7rem;
}

.assessment-sheet {
  padding: clamp(1.5rem, 4vw, 4rem);
  border: 1px solid rgb(109 104 95 / 20%);
  border-radius: 1.5rem 0.35rem 1.5rem 0.35rem;
  background: rgb(245 240 230 / 96%);
  box-shadow: 0 1.5rem 5rem rgb(29 26 23 / 9%);
}

.assessment-header {
  margin-bottom: 2rem;
}

.assessment-header h1 {
  margin-bottom: 1rem;
  font-size: clamp(2.4rem, 7vw, 4.4rem);
}

.assessment-question {
  margin: 0 0 1.4rem;
  padding: 1.2rem;
  border: 1px solid rgb(109 104 95 / 24%);
  border-radius: 1rem 0.25rem 1rem 0.25rem;
}

.assessment-question legend {
  padding: 0 0.5rem;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 1.2rem;
  font-weight: 800;
}

.assessment-question legend span {
  display: block;
  color: var(--cinnabar);
  font-family: "Noto Sans TC", sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.assessment-options {
  display: grid;
  gap: 0.55rem;
  padding-top: 1rem;
}

.assessment-option {
  display: grid;
  position: relative;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.55rem;
  align-items: center;
  min-height: 3rem;
  padding: 0.7rem;
  border: 1px solid rgb(109 104 95 / 24%);
  border-radius: 0.7rem 0.2rem 0.7rem 0.2rem;
  cursor: pointer;
}

.assessment-option:has(input:checked) {
  border-color: var(--cinnabar);
  background: rgb(182 64 50 / 7%);
}

.assessment-option input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.assessment-option:focus-within {
  outline: 3px double var(--cinnabar);
  outline-offset: 2px;
}

.option-marker {
  display: grid;
  width: 1.8rem;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid currentcolor;
  border-radius: 50%;
  font-weight: 800;
}

.question-feedback {
  margin-top: 0;
  overflow: hidden;
}

.question-feedback.is-correct,
.question-feedback.is-incorrect {
  margin-top: 1rem;
  padding: 1rem;
  border-left: 4px solid var(--mineral-green, #477362);
  background: rgb(71 115 98 / 9%);
}

.question-feedback.is-incorrect {
  border-left-color: #8e3e35;
  background: rgb(142 62 53 / 8%);
}

.question-feedback p {
  margin: 0.35rem 0;
}

.question-feedback a,
.evidence-link {
  color: var(--ink-primary);
  font-weight: 800;
}

.evidence-link {
  min-height: 2.75rem;
  padding: 0.55rem 0.8rem;
  border: 1px solid currentcolor;
  border-radius: 0.6rem;
  background: transparent;
}

.assessment-navigation {
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
  margin-top: 1rem;
}

.assessment-navigation button {
  min-height: 3rem;
}

.evidence-drawer {
  margin-top: 1.25rem;
  padding: 1.25rem;
  border: 2px solid var(--mineral-blue);
  border-radius: 1rem 0.25rem 1rem 0.25rem;
  background: var(--paper-secondary);
}

.evidence-drawer p {
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 1.05rem;
  line-height: 1.9;
}

.form-error {
  min-height: 1.5rem;
  color: #7f352d;
  font-weight: 800;
}

.assessment-completion {
  margin-top: 2rem;
  padding: 1.5rem;
  border: 1px solid rgb(71 115 98 / 38%);
  border-radius: 1rem 0.25rem 1rem 0.25rem;
  background: rgb(71 115 98 / 9%);
}

.assessment-completion h2 {
  margin-top: 0;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 2rem;
}

.city-view {
  width: min(76rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 7rem;
}

.city-header {
  max-width: 48rem;
  margin-bottom: 2rem;
}

.city-header h1 {
  max-width: 12ch;
}

.city-earned {
  display: inline-block;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--cinnabar);
  border-radius: 999px;
  color: var(--cinnabar);
  font-weight: 800;
}

.city-announcement {
  margin-bottom: 1.5rem;
  padding: 1.5rem;
  border: 1px solid rgb(71 115 98 / 38%);
  border-radius: 1rem 0.25rem 1rem 0.25rem;
  background: rgb(71 115 98 / 9%);
}

.city-announcement h2 {
  margin: 0.4rem 0;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 2rem;
}

.primary-link {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  margin-top: 0.6rem;
  padding: 0 1rem;
  border-radius: 0.7rem 0.2rem 0.7rem 0.2rem;
  background: var(--cinnabar);
  color: #fff8eb;
  font-weight: 800;
  text-decoration: none;
}

.building-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
}

.building-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 1.25rem;
  border: 1px solid rgb(109 104 95 / 24%);
  border-radius: 1.2rem 0.3rem 1.2rem 0.3rem;
  background: rgb(245 240 230 / 94%);
  transition:
    transform 240ms ease,
    background 240ms ease;
}

.building-card.is-upgraded {
  transform: translateY(-6px);
  background: rgb(231 216 188 / 98%);
}

.building-mark {
  display: grid;
  width: 3.5rem;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--cinnabar);
  border-radius: 50%;
  color: var(--cinnabar);
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 1.35rem;
  font-weight: 800;
}

.building-card h2 {
  font-family: "Noto Serif TC", "Songti TC", serif;
}

.building-stage-track {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.3rem;
  margin: auto 0 1rem;
}

.building-stage-track span {
  display: grid;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgb(109 104 95 / 25%);
  border-radius: 50%;
  color: var(--ink-muted);
  font-size: 0.75rem;
}

.building-stage-track span.is-built {
  border-color: var(--mineral-green);
  background: var(--mineral-green);
  color: #fff;
}

.building-invest {
  min-height: 3.2rem;
  border: 1px solid var(--ink-primary);
  border-radius: 0.7rem 0.2rem 0.7rem 0.2rem;
  background: transparent;
  color: var(--ink-primary);
  cursor: pointer;
  font-weight: 800;
}

.building-invest:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

@media (max-width: 36rem) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.25rem;
  }

  main {
    align-items: start;
  }

  .home-view {
    width: min(100% - 1rem, 36rem);
  }

  .home-hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 1.4rem;
  }

  .floating-city-preview {
    min-height: 14rem;
  }

  .route-section {
    padding-top: 3rem;
  }

  .section-heading {
    align-items: start;
    flex-direction: column;
    gap: 0;
  }

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

  .route-card {
    min-height: 0;
  }

  .reading-layout {
    display: block;
    width: 100%;
    padding: 0 0 6rem;
  }

  .reading-side {
    position: static;
    padding: 1rem;
  }

  .reading-side .chapter-label,
  .reading-difficulty {
    display: none;
  }

  .reading-article {
    padding: 1.35rem;
    border-right: 0;
    border-left: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .reading-controls {
    position: fixed;
    top: auto;
    right: 0.75rem;
    bottom: 0.75rem;
    left: 0.75rem;
    z-index: 15;
    display: flex;
    gap: 0.4rem;
    align-items: center;
    padding: 0.55rem;
    border: 1px solid rgb(109 104 95 / 25%);
    border-radius: 1rem;
    background: var(--paper-primary);
    box-shadow: 0 0.8rem 2rem rgb(29 26 23 / 18%);
  }

  .control-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }

  .mode-group {
    display: flex;
    flex: 1;
  }

  .mode-group button {
    flex: 1;
  }

  .font-size-group {
    display: flex;
    margin: 0;
  }

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

@media (max-width: 63.99rem) {
  .reading-layout {
    display: block;
    width: 100%;
    padding: 0 0 7rem;
  }

  .reading-side {
    position: static;
    padding: 1rem max(1rem, calc((100% - 45rem) / 2));
  }

  .reading-side .chapter-label,
  .reading-difficulty {
    display: none;
  }

  .reading-article {
    width: min(45rem, 100%);
    margin: 0 auto;
  }

  .reading-controls {
    position: fixed;
    top: auto;
    right: 0.75rem;
    bottom: 0.75rem;
    left: 0.75rem;
    z-index: 15;
  }
}

@media (min-width: 36.01rem) and (max-width: 63.99rem) {
  .home-hero {
    grid-template-columns: 1fr;
  }

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

  .route-card:last-child {
    grid-column: 1 / -1;
  }

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

@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;
  }
}