:root {
  --bg: #efe7da;
  --bg-deep: #1e2826;
  --panel: rgba(255, 250, 242, 0.84);
  --panel-strong: rgba(255, 251, 245, 0.94);
  --ink: #1f2928;
  --muted: #5d6966;
  --soft: #7a8380;
  --line: rgba(31, 41, 40, 0.11);
  --accent: #b56231;
  --accent-2: #1f5862;
  --accent-3: #8e7153;
  --shadow: 0 24px 70px rgba(24, 35, 35, 0.12);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(181, 98, 49, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(31, 88, 98, 0.14), transparent 30%),
    linear-gradient(180deg, #f4ede2 0%, #ebe1d1 100%);
  font-family: "Iowan Old Style", "Palatino Linotype", "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: 0.25;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.08));
}

.page-shell {
  width: min(1200px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 26px 0 72px;
}

.topbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.github-link,
.locale-toggle {
  border: 1px solid rgba(31, 41, 40, 0.12);
  border-radius: 999px;
  padding: 10px 16px;
  background: rgba(255, 250, 242, 0.88);
  color: var(--ink);
  cursor: pointer;
  font: 700 0.8rem/1 "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow);
}

.github-link {
  text-decoration: none;
}

.github-link:hover,
.locale-toggle:hover {
  background: rgba(255, 255, 255, 0.96);
}

.hidden {
  display: none;
}

.hero,
.section,
.intro-card,
.panel,
.case-card,
.model-card,
.path-card,
.persona-card {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.78fr);
  gap: 22px;
  padding: 32px;
  border-radius: var(--radius-xl);
  background: linear-gradient(145deg, rgba(252, 248, 242, 0.96), rgba(244, 234, 219, 0.9));
}

.eyebrow {
  margin: 0;
  color: var(--accent-2);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font: 600 0.74rem/1.4 "Avenir Next", "Helvetica Neue", Arial, sans-serif;
}

.hero h1,
.section h2,
.case-title,
.model-card h3,
.path-card h3,
.intro-card h2 {
  margin: 0;
  letter-spacing: -0.03em;
}

.hero h1 {
  margin-top: 10px;
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  line-height: 0.95;
  max-width: 12ch;
}

.hero-lead {
  margin: 18px 0 0;
  max-width: 56rem;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.78;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.pill,
.chip,
.anchor-chip,
.score-pill,
.tag,
.link-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  font: 600 0.82rem/1.1 "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.01em;
}

.pill {
  padding: 10px 13px;
  background: rgba(31, 88, 98, 0.1);
  color: var(--accent-2);
}

.hero-panel {
  display: grid;
  gap: 14px;
}

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

.stat-card,
.persona-card,
.intro-card,
.panel,
.case-card,
.model-card,
.path-card {
  border-radius: var(--radius-lg);
  background: var(--panel);
  backdrop-filter: blur(12px);
}

.stat-card {
  padding: 18px;
}

.stat-card .label,
.meta-line,
.case-meta,
.model-card .rank,
.muted,
.path-card p,
.intro-card p,
.case-copy,
.case-body p,
.stack p {
  color: var(--muted);
}

.stat-card strong {
  display: block;
  margin-top: 8px;
  font-size: 1.95rem;
  line-height: 1;
}

.persona-card {
  padding: 18px 20px;
}

.persona-text {
  margin: 12px 0 0;
  line-height: 1.7;
}

.section {
  margin-top: 20px;
  padding: 24px;
  border-radius: var(--radius-xl);
  background: rgba(255, 250, 243, 0.76);
}

.section-heading {
  margin-bottom: 18px;
}

.section-heading h2,
.intro-card h2 {
  margin-top: 8px;
  font-size: 1.9rem;
  line-height: 1.15;
}

.intro-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.intro-card {
  padding: 20px;
}

.ordered-list {
  margin: 14px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
  line-height: 1.65;
}

.chip-row,
.bucket-nav,
.link-row,
.case-tags,
.score-row,
.path-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip,
.anchor-chip,
.score-pill,
.tag,
.link-pill {
  padding: 9px 11px;
  background: rgba(233, 224, 209, 0.92);
  color: var(--ink);
  border: 1px solid rgba(31, 41, 40, 0.08);
  text-decoration: none;
}

.anchor-chip {
  background: rgba(31, 88, 98, 0.08);
  color: var(--accent-2);
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.model-figure-card,
.probe-card {
  border-radius: var(--radius-lg);
  background: var(--panel);
  backdrop-filter: blur(12px);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.model-card {
  padding: 20px;
}

.model-card h3 {
  margin-top: 10px;
  font-size: 1.28rem;
}

.model-card p {
  line-height: 1.75;
}

.model-card .rank {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(31, 88, 98, 0.1);
  color: var(--accent-2);
  font: 700 0.74rem/1 "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.watchout {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.watchout span {
  display: block;
  margin-bottom: 8px;
  color: var(--accent);
  font: 700 0.75rem/1.2 "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.model-figure-card {
  margin-top: 18px;
  padding: 14px;
}

.model-figure-image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid rgba(31, 41, 40, 0.08);
}

.probe-section {
  margin-top: 18px;
}

.probe-heading h3,
.probe-card h3 {
  margin: 0;
  letter-spacing: -0.02em;
}

.probe-heading p,
.probe-card p,
.probe-bottom-note {
  color: var(--muted);
  line-height: 1.75;
}

.probe-heading {
  margin-bottom: 14px;
}

.probe-heading p {
  margin: 8px 0 0;
}

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

.probe-card {
  padding: 18px;
}

.probe-card h3 {
  font-size: 1.08rem;
}

.probe-card p {
  margin: 10px 0 0;
}

.probe-bottom-note {
  margin: 16px 0 0;
  padding: 15px 18px 0;
  border-top: 1px solid var(--line);
  font-size: 1.02rem;
}

.bucket-nav {
  margin-bottom: 16px;
}

.case-grid {
  display: grid;
  gap: 16px;
}

.case-card {
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.case-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}

.case-card[data-bucket="Bucket 1"]::before {
  background: linear-gradient(180deg, #b56231, #d09b58);
}

.case-card[data-bucket="Bucket 2"]::before {
  background: linear-gradient(180deg, #1f5862, #4b8a91);
}

.case-card[data-bucket="Bucket 3"]::before {
  background: linear-gradient(180deg, #8e7153, #baa07e);
}

.case-card[data-bucket="Bucket 4"]::before {
  background: linear-gradient(180deg, #6a4f7a, #9f7ea9);
}

.case-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  padding-left: 8px;
}

.case-top h3 {
  margin: 8px 0 0;
  font-size: 1.4rem;
}

.case-kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.tag {
  padding: 7px 10px;
}

.case-copy {
  margin: 10px 0 0;
  line-height: 1.72;
}

.case-body {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.78fr);
  gap: 16px;
  margin-top: 16px;
  padding-left: 8px;
}

.case-text {
  display: grid;
  gap: 12px;
}

.q-block {
  padding: 14px 15px;
  border-radius: 18px;
  background: rgba(246, 241, 231, 0.9);
  border: 1px solid rgba(31, 41, 40, 0.08);
}

.q-label {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--accent-2);
  font: 700 0.76rem/1 "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.q-block p {
  margin: 0;
  white-space: pre-wrap;
  line-height: 1.8;
}

.case-aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.score-card,
.link-card {
  padding: 14px;
  border-radius: 18px;
  border: 1px solid rgba(31, 41, 40, 0.08);
  background: rgba(255, 255, 255, 0.5);
}

.score-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: baseline;
  margin-bottom: 8px;
}

.score-card h4,
.link-card h4 {
  margin: 0;
  font-size: 0.98rem;
}

.score-note {
  margin: 8px 0 0;
  color: var(--soft);
  line-height: 1.6;
  font-size: 0.94rem;
}

.score-row .score-pill {
  background: rgba(255, 255, 255, 0.88);
}

.link-row {
  margin-top: 10px;
}

.link-pill {
  background: rgba(31, 88, 98, 0.08);
  color: var(--accent-2);
  text-decoration: none;
}

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

.panel {
  padding: 20px;
}

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

.stack article {
  padding: 14px 15px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.52);
  border: 1px solid rgba(31, 41, 40, 0.08);
}

.stack h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}

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

.path-card {
  padding: 18px;
}

.path-link {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(244, 235, 220, 0.92);
  border: 1px solid rgba(31, 41, 40, 0.08);
  color: var(--accent-2);
  text-decoration: none;
  overflow-x: auto;
  white-space: nowrap;
}

.path-link:hover {
  background: rgba(240, 229, 210, 0.96);
}

.path-label {
  font: 700 0.98rem/1.2 "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
}

.path-separator {
  color: var(--soft);
}

.path-target {
  color: var(--accent-2);
}

@media (max-width: 1040px) {
  .hero,
  .intro-grid,
  .model-grid,
  .probe-grid,
  .split-grid,
  .path-grid,
  .case-body {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100vw - 20px, 1200px);
    padding: 10px 0 42px;
  }

  .hero,
  .section {
    padding: 18px;
    border-radius: 24px;
  }

  .hero h1 {
    max-width: none;
  }

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

  .case-top {
    flex-direction: column;
  }
}