:root {
  color-scheme: light dark;
  --bg: #f8f7f3;
  --surface: #ffffff;
  --surface-alt: #eeebe3;
  --text: #202426;
  --muted: #626b70;
  --border: #d9d5ca;
  --accent: #2d6f68;
  --accent-strong: #1f5752;
  --warning: #935b21;
  --shadow: 0 12px 28px rgba(32, 36, 38, 0.08);
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #151819;
    --surface: #1f2426;
    --surface-alt: #282e30;
    --text: #f1eee7;
    --muted: #bbc2c3;
    --border: #3a4244;
    --accent: #7bc6bd;
    --accent-strong: #a5dcd6;
    --warning: #e0b066;
    --shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
  }
}

:root[data-theme="dark"] {
  --bg: #151819;
  --surface: #1f2426;
  --surface-alt: #282e30;
  --text: #f1eee7;
  --muted: #bbc2c3;
  --border: #3a4244;
  --accent: #7bc6bd;
  --accent-strong: #a5dcd6;
  --warning: #e0b066;
  --shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 17px;
  line-height: 1.65;
}

a {
  color: var(--accent-strong);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(14px);
}

.nav,
.main,
.footer-inner {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand {
  flex: 0 0 auto;
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  flex-wrap: wrap;
}

.nav-link,
.dropdown summary,
.theme-toggle {
  min-height: 40px;
  padding: 8px 10px;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 15px;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
}

.nav-link:hover,
.dropdown summary:hover,
.theme-toggle:hover,
.nav-link[aria-current="page"],
.dropdown.current summary {
  background: var(--surface-alt);
  color: var(--text);
}

.dropdown {
  position: relative;
}

.dropdown summary {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

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

.dropdown summary::after {
  content: "v";
  color: var(--muted);
  font-size: 11px;
}

.dropdown-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  display: grid;
  min-width: 220px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.dropdown-menu a {
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 15px;
  text-decoration: none;
}

.dropdown-menu a:hover {
  background: var(--surface-alt);
  color: var(--text);
}

.dropdown-menu a[aria-current="page"] {
  color: var(--text);
  font-weight: 700;
}

.theme-toggle {
  border: 1px solid var(--border);
}

.main {
  padding: 56px 0 72px;
}

.hero {
  display: grid;
  gap: 20px;
  max-width: 840px;
  padding: 32px 0 48px;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.15;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(38px, 6vw, 68px);
}

h2 {
  font-size: clamp(27px, 4vw, 38px);
}

h3 {
  font-size: 22px;
}

p {
  margin: 0;
}

.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: 21px;
}

.section {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.section:first-child {
  border-top: 0;
}

.section-head {
  display: grid;
  gap: 10px;
  max-width: 760px;
  margin-bottom: 22px;
}

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

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

.card {
  display: grid;
  gap: 10px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.card p,
.muted {
  color: var(--muted);
}

.meta {
  color: var(--warning);
  font-size: 14px;
  font-weight: 800;
  text-transform: uppercase;
}

.meta.available {
  color: var(--accent);
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 14px;
  border: 1px solid var(--accent-strong);
  border-radius: var(--radius);
  background: var(--accent-strong);
  color: var(--surface);
  font-size: 15px;
  font-weight: 750;
  text-decoration: none;
}

.button:hover {
  background: var(--accent);
  color: var(--surface);
}

.button.secondary {
  background: transparent;
  color: var(--accent-strong);
}

.button.secondary:hover {
  color: var(--accent);
}

.content {
  display: grid;
  gap: 28px;
  max-width: 850px;
}

.content h2 {
  margin-bottom: 8px;
  font-size: 30px;
}

.content ul {
  display: grid;
  gap: 8px;
  margin: 10px 0 0;
  padding-left: 22px;
}

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

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

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

th {
  background: var(--surface-alt);
}

.notice {
  padding: 18px;
  border-left: 4px solid var(--accent);
  background: var(--surface-alt);
}

.rails-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  align-items: center;
  gap: clamp(28px, 5vw, 64px);
  padding: 32px 0 64px;
}

.rails-hero-copy {
  display: grid;
  gap: 20px;
}

.rails-manifesto {
  max-width: 600px;
  color: var(--text);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.2;
}

.rails-art {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.5);
  background: #eee8db;
  box-shadow: var(--shadow);
  transform: rotate(0.35deg);
}

.rails-art img {
  display: block;
  width: 100%;
  height: auto;
}

.rails-art figcaption {
  padding: 12px 16px;
  border-top: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  background: var(--surface);
  color: var(--muted);
  font-size: 14px;
}

.rails-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.rail-card {
  position: relative;
  display: grid;
  align-content: start;
  gap: 12px;
  min-height: 290px;
  padding: 26px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(145deg, var(--surface), var(--surface-alt));
}

.rail-card::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--accent), var(--warning));
  content: "";
}

.rail-card p:not(.rail-number) {
  color: var(--muted);
}

.rail-card .actions {
  align-self: end;
  margin-top: auto;
  padding-top: 10px;
}

.rail-number {
  color: var(--accent);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.rails-loop-section {
  display: grid;
  gap: 12px;
}

.rails-flow {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  margin: 4px 0 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  list-style: none;
}

.rails-flow li {
  position: relative;
  padding: 18px 13px;
  color: var(--text);
  font-size: 14px;
  font-weight: 750;
  text-align: center;
}

.rails-flow li + li {
  border-left: 1px solid var(--border);
}

.rails-step {
  display: block;
  margin-bottom: 4px;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.08em;
}

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

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 0;
  color: var(--muted);
  font-size: 14px;
}

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

@media (max-width: 900px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
  }

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

  .dropdown-menu {
    left: 0;
    right: auto;
  }

  .grid,
  .grid.two,
  .rails-grid {
    grid-template-columns: 1fr;
  }

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

  .rails-hero-copy {
    max-width: 760px;
  }

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

  .rails-flow li + li {
    border-left: 0;
  }

  .rails-flow li {
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }
}

@media (max-width: 560px) {
  body {
    font-size: 16px;
  }

  .nav,
  .main,
  .footer-inner {
    width: min(100% - 28px, 1120px);
  }

  .nav-links {
    gap: 2px;
  }

  .nav-link,
  .dropdown summary,
  .theme-toggle {
    padding: 8px;
    font-size: 14px;
  }

  h1 {
    font-size: 38px;
  }

  .lead {
    font-size: 18px;
  }

  .rails-hero {
    padding-top: 16px;
  }

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

  .rail-card {
    min-height: 0;
    padding: 22px;
  }

  .footer-inner {
    flex-direction: column;
  }
}