:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-soft: #f2f5fa;
  --surface-muted: #eef2f8;
  --text: #111827;
  --text-muted: #4b5563;
  --border: rgba(15, 23, 42, 0.12);
  --border-strong: rgba(15, 23, 42, 0.18);
  --accent: #1f4f9c;
  --accent-strong: #173f7d;
  --container: min(1240px, 92vw);
  --content: min(860px, 92vw);
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 12px;
}

* { box-sizing: border-box; }

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.content-container {
  width: var(--content);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
  padding: 0.7rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  text-decoration: none;
}

.brand-logo {
  height: 38px;
  width: auto;
  display: block;
}

.brand-word {
  font-size: 1.12rem;
  font-weight: 500;
  letter-spacing: 0.015em;
  font-family: "Avenir Next", "Inter", "Segoe UI", Roboto, sans-serif;
}

.header-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.93rem;
  font-weight: 600;
  padding: 0.45rem 0.72rem;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease;
}

nav a:hover {
  color: var(--text);
  background: var(--surface-soft);
  border-color: var(--border);
}

nav a.builder-link {
  color: var(--surface);
  background: var(--accent);
  border-color: var(--accent);
}

nav a.builder-link:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: var(--surface);
}



.lang-dropdown {
  position: relative;
}

.lang-dropdown select {
  appearance: none;
  color: var(--text);
  background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2364748b' d='M1.41 0 6 4.58 10.59 0 12 1.41 6 7.41 0 1.41z'/%3E%3C/svg%3E") no-repeat right 0.72rem center;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.48rem 2.1rem 0.48rem 0.72rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}

.lang-dropdown select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

main {
  flex: 1;
}

main.container {
  width: var(--content);
  padding: 2.5rem 0 4rem;
}

h1,
h2,
h3 {
  margin: 0 0 0.8rem;
  line-height: 1.16;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 3.2vw, 3.2rem);
}

@media (min-width: 1440px) {
  h1 {
    font-size: 3rem;
  }
}

h2 {
  font-size: clamp(1.65rem, 2.4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.05rem, 1.2vw, 1.3rem);
}

p {
  margin: 0 0 1rem;
  color: var(--text-muted);
}

a {
  color: var(--accent);
  word-break: break-word;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: #f8fafc;
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 0;
}

.footer-note {
  margin: 0;
  font-size: 0.92rem;
}

.footer-links {
  display: inline-flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.footer-links a {
  text-decoration: none;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--text);
}

/* Home page */
.home-page {
  width: var(--container);
  padding: 0;
}

.home-page section {
  padding: clamp(2.2rem, 4vw, 4.4rem) 0;
}

.home-page .eyebrow {
  display: inline-block;
  margin-bottom: 1rem;
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-weight: 700;
  color: #334155;
}

.hero {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: clamp(2rem, 4vw, 4.2rem);
  align-items: center;
  padding-top: clamp(3rem, 6vw, 5.2rem);
  padding-bottom: clamp(2.2rem, 5vw, 4.2rem);
}

.hero p {
  max-width: 62ch;
  font-size: 1.06rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.6rem 0 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 1rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 120ms ease, background-color 140ms ease, border-color 140ms ease;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-strong);
  color: #fff;
  border-color: var(--accent-strong);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-strong);
}

.micro-proof {
  font-size: 0.9rem;
  color: #475569;
}

.hero-panel {
  background: linear-gradient(180deg, #f9fbff 0%, #f1f5fb 100%);
  border: 1px solid var(--border);
  border-radius: 26px;
  padding: 1.15rem;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.07);
}

.panel-browser {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
}

.panel-top {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.62rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #cbd5e1;
}

.panel-url {
  margin-left: auto;
  font-size: 0.74rem;
  color: #64748b;
}

.panel-body {
  padding: 0.9rem;
  display: grid;
  gap: 0.65rem;
}

.mini-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
  padding: 0.7rem 0.8rem;
}

.mini-card strong {
  display: block;
  font-size: 0.92rem;
  margin-bottom: 0.15rem;
}

.mini-card span {
  color: #64748b;
  font-size: 0.85rem;
}

.section-head {
  max-width: 72ch;
  margin-bottom: 1.4rem;
}

.cards-3,
.route-grid,
.parts-grid {
  display: grid;
  gap: 1rem;
}

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

.card,
.route-card,
.part-tile,
.update-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 1.25rem;
}

.card p,
.route-card p,
.part-tile p,
.update-card p {
  margin-bottom: 0.75rem;
}

.card-label {
  font-size: 0.79rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64748b;
  font-weight: 700;
}

.inline-link {
  text-decoration: none;
  font-weight: 600;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.6rem;
  padding: 0.9rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface-muted);
}

.proof-item {
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.8);
  padding: 0.65rem 0.75rem;
  font-size: 0.84rem;
  color: #334155;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  align-items: center;
}

.visual-frame {
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
  padding: 0.85rem;
}

.visual-stack {
  display: grid;
  gap: 0.65rem;
}

.visual-line {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.75rem;
  background: var(--surface-soft);
}

.parts-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.part-thumb {
  aspect-ratio: 1.4;
  border-radius: 12px;
  border: 1px dashed rgba(15, 23, 42, 0.28);
  background: linear-gradient(135deg, #f8fafc, #eef2f8);
  margin-bottom: 0.75rem;
}

.meta {
  font-size: 0.84rem;
  color: #64748b;
}

.transparency {
  background: #eef3f9;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.6rem;
  max-width: 74ch;
}

.update-list {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.update-date {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #64748b;
  margin-bottom: 0.35rem;
}

.route-card {
  padding: 1.35rem;
}

.route-card h3 { margin-bottom: 0.45rem; }

/* Builder page */
.builder-page {
  width: var(--container);
  padding-top: clamp(2.4rem, 5vw, 4rem);
  --builder-section-gap: clamp(3.2rem, 7vw, 5.4rem);
}

.builder-page section {
  padding: var(--builder-section-gap) 0;
}

.builder-page .builder-hero {
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.94fr);
  align-items: start;
  gap: clamp(1.8rem, 4.2vw, 3.8rem);
  padding-top: 0;
  padding-bottom: clamp(3rem, 6.4vw, 4.6rem);
}

.builder-page .eyebrow {
  display: inline-block;
  margin-bottom: 0.9rem;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  color: #334155;
}

.builder-page .builder-hero h1 {
  max-width: 16ch;
  margin-bottom: 1rem;
}

.builder-page .builder-hero p {
  max-width: 64ch;
}

.builder-page .builder-preview-panel {
  position: relative;
  max-width: 680px;
  width: 100%;
  margin-left: auto;
  background: radial-gradient(130% 180% at 100% 0%, #e8f0ff 0%, #f2f6fc 46%, #ffffff 100%);
  border-color: rgba(31, 79, 156, 0.18);
}

.builder-page .builder-preview-panel::after {
  content: "";
  position: absolute;
  inset: 16px;
  border-radius: 20px;
  border: 1px solid rgba(31, 79, 156, 0.1);
  pointer-events: none;
}

.builder-page .panel-browser {
  position: relative;
  z-index: 1;
}

.builder-preview-media {
  background: #fff;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.builder-preview-media img {
  width: 100%;
  display: block;
  height: auto;
  aspect-ratio: 625 / 499;
  object-fit: contain;
  object-position: center top;
}

.builder-page .section-head h2 {
  max-width: 26ch;
}

.builder-page .cards-3 {
  gap: 1.1rem;
}

.builder-page .builder-how,
.builder-page .builder-fit {
  gap: clamp(1.4rem, 3.6vw, 3.1rem);
}

.builder-page .builder-how-main > .section-head {
  margin-bottom: 1.15rem;
}

.builder-page .builder-workflow-steps {
  display: grid;
  gap: 0.95rem;
}

.builder-page .card {
  padding: 1.35rem;
  min-height: 100%;
}

.builder-page .card h3 {
  margin-top: 0.25rem;
}

.builder-page .builder-expect-list {
  display: grid;
  gap: 0.65rem;
  margin-top: 1.2rem;
}

.builder-page .workflow-step {
  position: relative;
  padding: 0.9rem 0.95rem 0.9rem 3.2rem;
  min-height: 100%;
}

.builder-page .workflow-step::before {
  content: "";
  position: absolute;
  left: 0.8rem;
  top: 0.9rem;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 999px;
  background: #1f4f9c;
  box-shadow: 0 0 0 3px rgba(31, 79, 156, 0.16);
}

.builder-page .builder-reference-panel {
  padding: clamp(1rem, 2.4vw, 1.3rem);
}

.builder-page .builder-reference-panel .section-head {
  margin-bottom: 0.95rem;
}

.builder-page .builder-reference-panel h3 {
  font-size: clamp(1.14rem, 1.8vw, 1.3rem);
  margin-bottom: 0.55rem;
}

.builder-page .builder-reference-panel .visual-stack {
  gap: 0.75rem;
}

.builder-page .split {
  align-items: start;
  gap: clamp(1rem, 3vw, 2.6rem);
}

.builder-page .visual-frame {
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.06);
  padding: clamp(0.95rem, 2.2vw, 1.25rem);
}

.builder-page .visual-line:not(.workflow-step) {
  background: #f6f9fe;
  padding: 0.9rem 0.95rem;
}

.builder-page .transparency {
  max-width: none;
  padding: clamp(1.5rem, 3.5vw, 2.2rem);
}

.builder-page .builder-expect-panel .builder-expect-list {
  margin-top: 1.4rem;
  gap: 0.8rem;
}

.builder-page .builder-fit-main p:last-of-type {
  margin-bottom: 0.2rem;
}

.builder-page .builder-fit-panel .visual-stack {
  gap: 0.72rem;
}

.builder-page .proof-strip {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.7rem;
  padding: 1rem;
}

.builder-page .proof-item {
  text-align: center;
  font-weight: 600;
}

.builder-page .builder-next .section-head {
  margin-bottom: 2rem;
}

.builder-page .builder-support-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.3rem;
  margin-top: 1.1rem;
}

.builder-page .builder-support-links .inline-link {
  font-weight: 700;
}

.builder-page .route-card {
  display: grid;
  gap: 0.55rem;
  padding: 1.45rem;
}

.builder-page .route-card .inline-link {
  margin-top: 0.2rem;
}

@media (max-width: 900px) {
  .builder-page .builder-hero,
  .builder-page .builder-how,
  .builder-page .builder-fit {
    grid-template-columns: minmax(0, 1fr);
  }

  .builder-page .builder-hero {
    gap: 1.45rem;
  }

  .builder-page .builder-hero h1 {
    max-width: 24ch;
    font-size: clamp(1.95rem, 5.6vw, 2.75rem);
  }

  .builder-page .builder-preview-panel {
    max-width: none;
    margin: 0;
  }

  .builder-page .builder-reference-panel,
  .builder-page .builder-fit-panel,
  .builder-page .builder-how-main,
  .builder-page .builder-fit-main {
    width: 100%;
    min-width: 0;
  }
}

@media (max-width: 1020px) {
  .hero,
  .split,
  .cards-3,
  .route-grid,
  .proof-strip,
  .parts-grid,
  .update-list {
    grid-template-columns: 1fr 1fr;
  }

  .header-links {
    margin-left: 0;
  }

  .builder-page .proof-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .builder-page .builder-hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.4rem;
  }

  .builder-page .builder-preview-panel {
    max-width: min(100%, 760px);
    margin: 0;
  }

  .builder-page .builder-how {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 768px) {
  .builder-page {
    --builder-section-gap: clamp(2.3rem, 8vw, 3.2rem);
  }

  .builder-page .builder-hero {
    gap: 1.2rem;
    padding-bottom: clamp(2.2rem, 8vw, 3.4rem);
  }

  .builder-page .builder-hero h1 {
    max-width: none;
    font-size: clamp(1.72rem, 8vw, 2.3rem);
    line-height: 1.14;
  }

  .builder-page .builder-hero p {
    max-width: none;
  }

  .builder-page .cta-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.72rem;
    margin: 1.25rem 0 0.95rem;
  }

  .builder-page .cta-row .btn {
    width: 100%;
    padding: 0.84rem 1rem;
  }

  .builder-page .cards-3,
  .builder-page .route-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .builder-page .builder-reference-panel {
    margin-top: 0.45rem;
  }

  .builder-page .builder-reference-panel .visual-line,
  .builder-page .builder-expect-list .visual-line,
  .builder-page .builder-fit-panel .visual-line {
    padding: 0.95rem 1rem;
  }

  .builder-page .builder-expect-panel {
    padding: clamp(1.2rem, 4.2vw, 1.6rem);
  }

  .builder-page .builder-expect-list {
    gap: 0.75rem;
  }

  .builder-page .proof-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem;
  }
}

@media (max-width: 480px) {
  .builder-page .proof-strip {
    grid-template-columns: minmax(0, 1fr);
  }

  .builder-page .proof-item {
    text-align: left;
  }
}

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

  .header-links {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.7rem;
  }

  nav,
  .lang-dropdown {
    width: 100%;
  }

  .lang-dropdown select {
    width: 100%;
  }

  .hero,
  .split,
  .cards-3,
  .route-grid,
  .proof-strip,
  .parts-grid,
  .update-list {
    grid-template-columns: 1fr;
  }

  .home-page section {
    padding: 3.1rem 0;
  }

  main.container {
    padding-top: 1.8rem;
  }

  .builder-page {
    width: var(--content);
  }

  .builder-page section {
    padding: clamp(2.4rem, 8vw, 3rem) 0;
  }

  .builder-page .builder-hero h1,
  .builder-page .section-head h2 {
    max-width: none;
  }

  .builder-page .builder-preview-panel::after {
    inset: 10px;
  }

  .builder-page .proof-strip {
    grid-template-columns: 1fr;
  }

  .builder-page .workflow-step {
    padding-left: 2.6rem;
  }

  .builder-page .workflow-step::before {
    left: 0.65rem;
  }

  .builder-page .builder-support-links {
    margin-top: 1.2rem;
    gap: 0.7rem 1.1rem;
  }

  .builder-page .route-card {
    padding: 1.2rem;
  }

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

@media (min-width: 1440px) {
  .home-page section {
    padding: 3.2rem 0;
  }

  .hero {
    padding-top: 4.2rem;
    padding-bottom: 3.4rem;
  }
}

/* Parts Library page */
.parts-library-page {
  display: grid;
  gap: 1.8rem;
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: #64748b;
}

.breadcrumb a {
  text-decoration: none;
}

.parts-hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.2rem;
  align-items: start;
}

.parts-hero p {
  max-width: 68ch;
}

.library-proof,
.parts-framing,
.builder-relationship,
.source-license,
.state-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 1.2rem;
}

.library-proof {
  background: linear-gradient(180deg, #f8fbff 0%, #f3f6fb 100%);
}

.library-proof h2 {
  font-size: 1.2rem;
  margin-bottom: 0.8rem;
}

.library-proof ul,
.source-license ul {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.55rem;
}

.library-proof li span {
  display: block;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.parts-subnav {
  --parts-subnav-offset: 80px;
  position: sticky;
  top: var(--parts-subnav-offset);
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0.7rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
}

.parts-subnav a {
  text-decoration: none;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 600;
  font-size: 0.9rem;
}

.parts-subnav a:hover {
  background: var(--surface-soft);
}

.parts-category {
  display: grid;
  gap: 1rem;
}

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

.library-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 0.9rem;
}

.library-card img {
  display: block;
  width: 100%;
  aspect-ratio: 1.35;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
  margin-bottom: 0.8rem;
  background: var(--surface-soft);
}

.library-card__placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  aspect-ratio: 1.35;
  border-radius: 12px;
  border: 1px dashed var(--border);
  margin-bottom: 0.8rem;
  background: var(--surface-soft);
  color: var(--text-muted);
  font-size: 0.88rem;
  text-align: center;
  padding: 0.8rem;
}

.library-card h3 {
  margin-bottom: 0.35rem;
}

.state-card {
  border-style: dashed;
  background: #fcfdff;
}

.source-license-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 1.2rem;
}

.license-image {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.5rem;
  background: #fff;
}

.license-image img {
  max-width: 170px;
  height: auto;
}

.parts-next {
  padding-bottom: 0.4rem;
}

@media (max-width: 1020px) {
  .parts-hero,
  .library-grid,
  .source-license-grid {
    grid-template-columns: 1fr 1fr;
  }

  .source-license-grid {
    align-items: start;
  }
}

@media (max-width: 760px) {
  .parts-hero,
  .library-grid,
  .source-license-grid {
    grid-template-columns: 1fr;
  }

  .parts-subnav {
    --parts-subnav-offset: 68px;
  }
}


/* Updates / Open Source / Contact pages */
.updates-page,
.open-source-page,
.contact-page {
  display: grid;
  gap: 1.4rem;
}

.about-page {
  display: grid;
  gap: 1.35rem;
}

.about-hero,
.about-section {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: clamp(1.15rem, 2.6vw, 1.6rem);
}

.about-hero {
  background: linear-gradient(180deg, #f8fbff 0%, #f3f7fd 100%);
}

.about-lead,
.contact-lead {
  font-size: 1.04rem;
  color: #334155;
}

.about-section p,
.about-hero p {
  max-width: 74ch;
}

.about-grid,
.about-routes-grid,
.contact-method-grid,
.contact-route-grid {
  display: grid;
  gap: 0.9rem;
}

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

.about-routes-grid,
.contact-route-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: stretch;
}

.about-routes-grid > a.route-card,
.contact-route-grid > a.route-card {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  text-decoration: none;
  color: inherit;
  gap: 0.55rem;
  height: 100%;
}

.about-routes-grid > a.route-card h3,
.contact-route-grid > a.route-card h3 {
  margin: 0;
}

.about-routes-grid > a.route-card p,
.contact-route-grid > a.route-card p {
  margin: 0;
  color: var(--text-muted);
}

.about-card,
.contact-method {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-soft);
  padding: 0.95rem 1rem;
}

.about-early {
  background: #eef4fb;
  border-color: rgba(31, 79, 156, 0.2);
}

.about-flow {
  display: grid;
  gap: 0.6rem;
  margin: 1rem 0 0.8rem;
}

.about-flow-row {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-soft);
  padding: 0.72rem 0.82rem;
}

.about-flow-row strong {
  display: block;
  margin-bottom: 0.12rem;
}

.route-card-primary {
  border-color: rgba(31, 79, 156, 0.28);
  background: linear-gradient(180deg, #f8fbff 0%, #f2f6fd 100%);
}

.updates-intro,
.open-source-intro,
.contact-intro,
.updates-frame,
.updates-routes,
.reference-block,
.boundary-block,
.contact-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 1.2rem;
}

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

.update-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-soft);
  padding: 1rem;
}

.meta-line {
  font-size: 0.86rem;
  color: #64748b;
  margin-bottom: 0.35rem;
  display: block;
}

.reference-list,
.contact-list {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.5rem;
}

.contact-method-note {
  margin: 1rem 0 0;
}

@media (max-width: 900px) {
  .about-routes-grid,
  .contact-route-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .about-grid,
  .about-routes-grid,
  .contact-method-grid,
  .contact-route-grid,
  .updates-items {
    grid-template-columns: 1fr;
  }
}


.site-header.is-hidden + main .parts-library-page .parts-subnav,
.site-header[style*="translateY(-"] + main .parts-library-page .parts-subnav,
body.header-hidden .parts-library-page .parts-subnav {
  --parts-subnav-offset: 10px !important;
}