:root {
  color-scheme: light;
  --ink: #172026;
  --muted: #5d6973;
  --paper: #f7f8f3;
  --panel: #ffffff;
  --line: #dfe4e3;
  --blue: #2563eb;
  --teal: #0891b2;
  --green: #16a34a;
  --gold: #d97706;
  --coral: #e05252;
  --violet: #7c3aed;
  --gray: #6b7280;
  --radius: 8px;
  --shadow: 0 20px 45px rgba(23, 32, 38, 0.08);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(247, 248, 243, 0.96)),
    repeating-linear-gradient(90deg, rgba(23, 32, 38, 0.035) 0 1px, transparent 1px 88px),
    var(--paper);
  color: var(--ink);
  min-height: 100vh;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.35);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  transform: translateY(-130%);
  background: #101820;
  color: #fff;
  padding: 10px 12px;
  border-radius: var(--radius);
  z-index: 100;
}

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



.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(247, 248, 243, 0.86);
  backdrop-filter: blur(14px);
}

.site-nav {
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  width: min(100%, 1180px);
  margin: 0 auto;
  padding: 13px 18px;
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--ink);
  font-weight: 900;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: #101820;
  color: #fff;
  font-size: 0.88rem;
}

.nav-links {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 800;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
}

.site-shell {
  display: grid;
  grid-template-columns: minmax(0, 1060px);
  justify-content: center;
  gap: 24px;
  width: min(100%, 1700px);
  margin: 0 auto;
  padding: 24px 18px 52px;
}

main {
  min-width: 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(240px, 0.7fr);
  gap: 20px;
  align-items: end;
  padding: 16px 0 18px;
  border-bottom: 1px solid var(--line);
}

.hero--compact {
  grid-template-columns: 1fr;
  max-width: 900px;
}

.eyebrow {
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  margin: 0 0 12px;
}

h1,
h2,
h3 {
  color: var(--ink);
  letter-spacing: 0;
}

h1 {
  font-size: clamp(2rem, 4.8vw, 4.35rem);
  line-height: 1;
  margin: 0;
  max-width: 860px;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.08;
  margin: 0 0 16px;
}

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

.intro,
.lede {
  color: var(--muted);
  font-size: clamp(0.96rem, 1.5vw, 1.08rem);
  line-height: 1.6;
  max-width: 720px;
  margin: 14px 0 0;
}

.snapshot {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  align-self: stretch;
}

.stat-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  min-height: 96px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stat-card b {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1;
}

.stat-card span {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
}

.controls {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 24px 0 18px;
}

.as-of {
  color: var(--muted);
  font-weight: 700;
}

.legend {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
  color: var(--muted);
  font-size: 0.9rem;
}

.legend-item {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  white-space: nowrap;
}

.swatch {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--swatch);
}

.age-scale {
  position: relative;
  height: 48px;
  margin: 4px 0 20px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.76rem;
}

.tick {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--x);
  border-left: 1px solid rgba(23, 32, 38, 0.12);
}

.tick span {
  position: absolute;
  top: 14px;
  transform: translateX(-50%);
  background: var(--paper);
  padding: 0 4px;
  white-space: nowrap;
}

.generation-list,
.card-grid,
.detail-grid {
  display: grid;
  gap: 14px;
}

.generation-card {
  --accent: var(--blue);
  display: grid;
  grid-template-columns: minmax(210px, 0.95fr) minmax(280px, 1.45fr) minmax(160px, 0.55fr);
  gap: 18px;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 7px solid var(--accent);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 14px 34px rgba(23, 32, 38, 0.06);
}

.generation-title {
  display: flex;
  gap: 12px;
  align-items: center;
  min-width: 0;
}

.mark {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.5), transparent),
    var(--accent);
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 900;
}

.generation-title h2,
.generation-title h3 {
  margin: 0 0 4px;
  font-size: clamp(1.06rem, 2vw, 1.42rem);
  line-height: 1.15;
}

.generation-title h2 a,
.generation-title h3 a {
  color: inherit;
  text-decoration: none;
}

.generation-title h2 a:hover,
.generation-title h3 a:hover {
  color: #1f5fbf;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.generation-title p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.range-visual {
  min-width: 0;
}

.age-line {
  height: 18px;
  position: relative;
  background: #eef1ef;
  border-radius: 999px;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(23, 32, 38, 0.06);
}

.age-bar {
  position: absolute;
  left: var(--left, 0%);
  width: max(2px, var(--width, 0%));
  top: 0;
  bottom: 0;
  border-radius: 999px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0)),
    var(--accent);
}

.range-copy {
  margin: 10px 0 0;
  font-size: 1rem;
  line-height: 1.45;
  color: #33404a;
}

.age-number {
  text-align: right;
}

.age-number strong {
  display: block;
  font-size: clamp(1.9rem, 3.8vw, 3.1rem);
  line-height: 1;
}

.age-number span {
  color: var(--muted);
  font-size: 0.84rem;
}

.text-link {
  color: #1f5fbf;
  font-weight: 800;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.content-section {
  margin-top: 34px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.content-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 14px 34px rgba(23, 32, 38, 0.05);
}

.content-panel p,
.content-panel li,
.faq-item p,
.sources p {
  color: var(--muted);
  line-height: 1.68;
}

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

.mini-card {
  --accent: var(--blue);
  display: block;
  min-height: 174px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 6px solid var(--accent);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  box-shadow: 0 14px 34px rgba(23, 32, 38, 0.05);
}

.mini-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 36px rgba(23, 32, 38, 0.08);
}

.mini-card p {
  color: var(--muted);
  line-height: 1.55;
  margin: 0;
}

.mini-card .meta {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.calculator {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.calculator-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.calculator input {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 14px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}

.button {
  border: 0;
  border-radius: var(--radius);
  background: #101820;
  color: #fff;
  font: inherit;
  font-weight: 900;
  padding: 0 18px;
  min-height: 48px;
  cursor: pointer;
}

.button:hover {
  background: #253340;
}

.calculator-result {
  display: none;
  border-left: 6px solid var(--accent, var(--blue));
  border-radius: var(--radius);
  background: #fff;
  padding: 16px;
  box-shadow: 0 14px 34px rgba(23, 32, 38, 0.05);
}

.calculator-result.is-visible {
  display: block;
}

.calculator-result strong {
  display: block;
  font-size: 1.35rem;
  margin-bottom: 6px;
}

.table-wrap {
  overflow-x: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  background: #eef1ef;
  color: #33404a;
  font-size: 0.82rem;
  text-transform: uppercase;
}

td {
  color: var(--muted);
}

td:first-child {
  color: var(--ink);
  font-weight: 900;
}

tr:last-child td {
  border-bottom: 0;
}

.detail-hero-card {
  --accent: var(--blue);
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 7px solid var(--accent);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.detail-hero-card strong {
  display: block;
  font-size: clamp(2.2rem, 5vw, 4.3rem);
  line-height: 1;
  margin-bottom: 8px;
}

.detail-hero-card span {
  color: var(--muted);
  font-weight: 800;
}

.crumbs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 800;
  margin-bottom: 18px;
}

.crumbs a {
  color: #1f5fbf;
  text-decoration: none;
}

.sources,
.site-footer {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.65;
}

.sources a,
.site-footer a {
  color: #1f5fbf;
  font-weight: 700;
}

.footer-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.ad-implementation-note {
  display: none;
}

@media (max-width: 1120px) {
  .site-shell {
    grid-template-columns: minmax(0, 1fr);
    width: min(100%, 980px);
  }

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

  .generation-card {
    grid-template-columns: 1fr;
  }

  .age-number {
    text-align: left;
  }
}

@media (max-width: 760px) {
  .site-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .site-shell {
    padding: 18px 14px 38px;
  }

  .hero {
    padding-top: 12px;
  }

  .snapshot,
  .card-grid {
    grid-template-columns: 1fr;
  }

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

  .legend {
    justify-content: flex-start;
  }

  .generation-card {
    padding: 16px;
  }

  .generation-title {
    align-items: flex-start;
  }

  .tick span {
    font-size: 0.68rem;
  }

  .calculator-row {
    grid-template-columns: 1fr;
  }
}