:root {
  --bg: #08111f;
  --bg-soft: #0f172a;
  --panel: rgba(15, 23, 42, 0.78);
  --panel-strong: rgba(15, 23, 42, 0.92);
  --border: rgba(148, 163, 184, 0.18);
  --text: #e2e8f0;
  --text-soft: #cbd5e1;
  --muted: #94a3b8;
  --brand: #38bdf8;
  --brand-strong: #1d4ed8;
  --warm: #f59e0b;
  --ok: #34d399;
  --shadow: 0 28px 72px rgba(2, 6, 23, 0.42);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --max-width: min(1160px, calc(100vw - 2.4rem));
  --font-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font-body: "IBM Plex Sans", "Avenir Next", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--text);
  line-height: 1.65;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 24%),
    radial-gradient(circle at top right, rgba(245, 158, 11, 0.14), transparent 26%),
    linear-gradient(180deg, #08111f 0%, #0b1224 42%, #0c1427 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.12), rgba(15, 23, 42, 0));
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

.site-shell {
  width: var(--max-width);
  margin: 0 auto;
  padding: 1.2rem 0 4rem;
}

.site-header,
.panel,
.card,
.faq-item,
.notice {
  backdrop-filter: blur(20px) saturate(130%);
  -webkit-backdrop-filter: blur(20px) saturate(130%);
}

.site-header {
  position: sticky;
  top: 1rem;
  z-index: 40;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.15rem;
  margin-bottom: 1.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(8, 17, 31, 0.78);
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-weight: 700;
}

.brand-mark {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(29, 78, 216, 0.24), rgba(56, 189, 248, 0.2));
  border: 1px solid rgba(125, 211, 252, 0.22);
}

.brand-mark strong {
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.brand-copy {
  display: grid;
  gap: 0.08rem;
}

.brand-copy small {
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

.site-nav a {
  padding: 0.68rem 0.9rem;
  border-radius: 999px;
  color: var(--text-soft);
}

.site-nav a:hover,
.site-nav a:focus-visible,
.button:hover,
.button:focus-visible,
.filter-chip:hover,
.filter-chip:focus-visible,
.card a:hover,
.card a:focus-visible {
  transform: translateY(-1px);
}

.hero,
.section,
.page-hero {
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero,
.page-hero {
  padding: clamp(1.6rem, 3vw, 2.6rem);
}

.hero {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.4rem;
}

.section {
  margin-top: 1.4rem;
  padding: clamp(1.3rem, 2.6vw, 2rem);
}

.eyebrow {
  margin: 0;
  color: var(--brand);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.76rem;
  font-weight: 700;
}

.hero h1,
.page-hero h1,
.section h2,
.card h3,
.route-card h3,
.faq-item summary {
  margin: 0;
  font-family: var(--font-display);
  line-height: 1.03;
}

.hero h1,
.page-hero h1 {
  margin-top: 0.6rem;
  font-size: clamp(2.6rem, 5vw, 4.7rem);
}

.hero-lead,
.page-lead,
.section-intro {
  max-width: 62ch;
  margin: 1rem 0 0;
  color: var(--text-soft);
  font-size: 1.04rem;
}

.hero-actions,
.page-actions,
.card-actions,
.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 3rem;
  padding: 0.8rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.button.primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-strong));
  color: white;
}

.button.secondary {
  border-color: rgba(148, 163, 184, 0.28);
  background: rgba(15, 23, 42, 0.48);
}

.button.ghost {
  border-color: rgba(245, 158, 11, 0.24);
  background: rgba(245, 158, 11, 0.08);
}

.hero-stats,
.metrics,
.project-grid,
.route-grid,
.link-grid,
.signal-grid {
  display: grid;
  gap: 1rem;
}

.hero-stats {
  align-self: stretch;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.metric,
.card,
.route-card,
.notice {
  padding: 1rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: var(--panel-strong);
}

.metric strong,
.card strong,
.notice strong {
  display: block;
  font-size: 1.2rem;
}

.metric small,
.card p,
.route-card p,
.faq-body,
.notice p,
.meta-list dd {
  color: var(--text-soft);
}

.meta-row,
.section-top,
.project-toolbar,
.card-top,
.breadcrumbs,
.footer-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.section-top {
  justify-content: space-between;
}

.project-toolbar {
  margin-top: 1rem;
  justify-content: space-between;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 0.95rem;
  min-width: min(100%, 22rem);
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: rgba(15, 23, 42, 0.7);
}

.search-box input {
  width: 100%;
  background: transparent;
  border: 0;
  color: var(--text);
  outline: 0;
}

.search-box input::placeholder {
  color: var(--muted);
}

.filter-row,
.tag-row,
.meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.filter-chip,
.tag,
.kicker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.1rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(15, 23, 42, 0.54);
  color: var(--text-soft);
}

.project-grid,
.route-grid,
.link-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1rem;
}

.signal-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1rem;
}

.card,
.route-card {
  display: grid;
  gap: 0.9rem;
}

.card-top {
  justify-content: space-between;
}

.card h3,
.route-card h3 {
  font-size: 1.6rem;
}

.card p,
.route-card p {
  margin: 0;
}

.link-list,
.meta-list,
.simple-list {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.meta-list dt {
  color: var(--muted);
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.meta-list dd {
  margin: 0.16rem 0 0;
}

.breadcrumbs {
  margin-bottom: 1.1rem;
  color: var(--muted);
  font-size: 0.94rem;
}

.breadcrumbs a {
  color: var(--text-soft);
}

.faq-list {
  display: grid;
  gap: 0.8rem;
  margin-top: 1rem;
}

.faq-item {
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.8);
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 1.1rem;
  font-size: 1.12rem;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-body {
  padding: 0 1.1rem 1rem;
}

.notice {
  margin-top: 1rem;
}

.site-footer {
  margin-top: 1.4rem;
  padding: 1.2rem 0 0;
  color: var(--muted);
}

.footer-row {
  justify-content: space-between;
}

.footer-row p {
  margin: 0;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: white;
  color: #0f172a;
}

.card[hidden] {
  display: none;
}

@media (max-width: 920px) {
  .hero,
  .project-grid,
  .route-grid,
  .link-grid,
  .signal-grid,
  .meta-list {
    grid-template-columns: 1fr;
  }

  .site-header,
  .project-toolbar,
  .section-top,
  .footer-row {
    align-items: flex-start;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(100vw - 1rem, 100%);
  }

  .site-header {
    position: static;
    border-radius: var(--radius-lg);
  }

  .site-nav {
    width: 100%;
  }

  .site-nav a {
    flex: 1 1 9rem;
    justify-content: center;
  }
}