:root {
  --navy-950: #0B1826;
  --navy-800: #132A3F;
  --navy-700: #1D3A54;
  --navy-600: #2A4A66;
  --paper: #E9E4D8;
  --amber: #F2A63D;
  --amber-dim: #C98A2E;
  --teal: #5FD6C4;
  --text-hi: #EAF1F8;
  --text-lo: #7E93A8;
  --ink: #12202E;
  --danger: #E8735A;

  --font-display: "Space Grotesk", "IBM Plex Sans", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--navy-950);
  color: var(--text-hi);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; margin: 0; color: var(--text-hi); }
p { margin: 0 0 1em; color: var(--text-lo); max-width: 62ch; }
code, .mono { font-family: var(--font-mono); }

/* ---------- shell ---------- */

.nav {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 28px;
  background: var(--navy-950);
  border-bottom: 1px solid var(--navy-700);
}
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 600; font-size: 17px; color: var(--text-hi); }
.brand svg { flex: none; }
.nav-links { display: flex; align-items: center; gap: 22px; font-size: 14.5px; }
.nav-links a { color: var(--text-lo); }
.nav-links a:hover { color: var(--text-hi); text-decoration: none; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-body); font-weight: 500; font-size: 14.5px;
  padding: 10px 18px; border-radius: 4px; border: 1px solid transparent;
  cursor: pointer; transition: background-color 120ms ease, border-color 120ms ease;
}
.btn-primary { background: var(--amber); color: var(--ink); }
.btn-primary:hover { background: #ffb752; text-decoration: none; }
.btn-ghost { background: transparent; border-color: var(--navy-600); color: var(--text-hi); }
.btn-ghost:hover { border-color: var(--teal); text-decoration: none; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 28px; }

/* ---------- hero ---------- */

.hero { padding: 72px 0 88px; }
.hero-inner { display: grid; grid-template-columns: 1fr; gap: 44px; }
@media (min-width: 900px) {
  .hero-inner { grid-template-columns: 1.05fr 0.95fr; align-items: center; }
}
.hero h1 { font-size: clamp(32px, 4.4vw, 48px); line-height: 1.12; letter-spacing: -0.01em; margin-bottom: 18px; }
.hero p.lede { color: var(--text-hi); opacity: 0.78; font-size: 17px; max-width: 46ch; }
.hero-ctas { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }

/* split-flap departures board */
.board {
  background: #081119;
  border: 1px solid var(--navy-700);
  border-radius: 3px;
  overflow: hidden;
}
.board-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--navy-700);
  font-family: var(--font-mono); font-size: 12.5px; color: var(--text-lo);
}
.board-head .live-dot {
  display: inline-block; width: 7px; height: 7px; border-radius: 50%;
  background: var(--teal); margin-right: 7px; box-shadow: 0 0 6px var(--teal);
}
.board-rows { padding: 6px 0; }
.board-row {
  display: grid;
  grid-template-columns: 64px 1fr 56px 96px;
  gap: 10px; align-items: center;
  padding: 10px 16px;
  font-family: var(--font-mono); font-size: 13.5px;
  border-bottom: 1px solid #0f2233;
}
.board-row:last-child { border-bottom: none; }
.board-row .flap {
  display: inline-block; letter-spacing: 0.02em; color: var(--text-hi);
}
.board-row .route { color: var(--text-hi); }
.board-row .route .arr { color: var(--text-lo); padding: 0 4px; }
.board-row .time { color: var(--text-lo); text-align: right; }
.board-row .status { text-align: right; font-size: 12px; }
.status.on-time { color: var(--teal); }
.status.boarding { color: var(--amber); }
.status.scheduled { color: var(--text-lo); }

/* flap flip-in animation, plays once per row on load/refresh */
@keyframes flapIn {
  0% { opacity: 0; transform: translateY(-6px) scaleY(0.4); }
  60% { opacity: 1; }
  100% { opacity: 1; transform: translateY(0) scaleY(1); }
}
.board-row { animation: flapIn 420ms ease both; }

/* ---------- flight-plan rail ---------- */

.section { position: relative; padding: 64px 0; border-top: 1px solid var(--navy-700); }
.section-inner { display: grid; grid-template-columns: 28px 1fr; gap: 22px; }
.rail { position: relative; }
.rail::before {
  content: ""; position: absolute; left: 13px; top: 6px; bottom: -64px;
  width: 1px; background: var(--navy-600);
}
.section:last-of-type .rail::before { display: none; }
.waypoint {
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--navy-950); border: 2px solid var(--teal);
  margin-top: 4px;
}
.section-content { max-width: 680px; }
.section-content h2 { font-size: 26px; margin-bottom: 10px; }
.section-content > p.intro { margin-bottom: 32px; }

/* capability grid */
.cap-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1px; background: var(--navy-700); border: 1px solid var(--navy-700); border-radius: 4px; overflow: hidden; }
.cap-card { background: var(--navy-800); padding: 20px; }
.cap-card h3 { font-size: 15.5px; margin-bottom: 6px; }
.cap-card p { font-size: 13.5px; margin: 0; }

/* quick start */
.steps { counter-reset: step; margin-bottom: 30px; }
.step { display: flex; gap: 16px; margin-bottom: 22px; }
.step-num {
  flex: none; width: 28px; height: 28px; border-radius: 50%;
  background: var(--navy-800); border: 1px solid var(--navy-600);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 13px; color: var(--teal);
}
.step-body h3 { font-size: 15.5px; margin-bottom: 4px; }
.step-body p { font-size: 14px; margin-bottom: 0; }

.code-panel { background: #081119; border: 1px solid var(--navy-700); border-radius: 4px; overflow: hidden; margin-bottom: 28px; }
.code-tabs { display: flex; border-bottom: 1px solid var(--navy-700); }
.code-tab {
  font-family: var(--font-mono); font-size: 12.5px; color: var(--text-lo);
  background: transparent; border: none; padding: 10px 16px; cursor: pointer;
  border-right: 1px solid var(--navy-700);
}
.code-tab.active { color: var(--amber); background: var(--navy-800); }
.code-body { position: relative; }
.code-body pre { margin: 0; padding: 18px 20px; font-family: var(--font-mono); font-size: 13px; line-height: 1.6; overflow-x: auto; color: var(--text-hi); }
.code-body pre[hidden] { display: none; }
.copy-btn {
  position: absolute; top: 8px; right: 10px;
  font-family: var(--font-body); font-size: 11.5px; color: var(--text-lo);
  background: var(--navy-800); border: 1px solid var(--navy-600); border-radius: 3px;
  padding: 4px 9px; cursor: pointer;
}
.copy-btn:hover { color: var(--text-hi); border-color: var(--teal); }

/* try it */
.tryit { background: var(--navy-800); border: 1px solid var(--navy-700); border-radius: 4px; padding: 22px; margin-top: 4px; }
.tryit-form { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: 12px; color: var(--text-lo); }
.field input, .field select {
  font-family: var(--font-mono); font-size: 13.5px; color: var(--text-hi);
  background: var(--navy-950); border: 1px solid var(--navy-600); border-radius: 3px;
  padding: 9px 10px; width: 130px;
}
.field input:focus, .field select:focus { border-color: var(--teal); }
.tryit-results { font-family: var(--font-mono); font-size: 13px; }
.tryit-row { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-top: 1px solid var(--navy-700); }
.tryit-row:first-child { border-top: none; }
.tryit-empty { color: var(--text-lo); font-family: var(--font-body); font-size: 13.5px; }

/* get a key */
.key-form { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; margin-bottom: 20px; }
.key-form .field input { width: 220px; }
.key-panel {
  background: var(--paper); color: var(--ink); border-radius: 6px;
  padding: 22px 24px; margin-top: 6px;
}
.key-panel h3 { color: var(--ink); font-size: 15px; margin-bottom: 4px; }
.key-panel .warn { color: #8A4A1E; font-size: 13px; margin-bottom: 16px; }
.key-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 0; border-top: 1px solid #cfc8b6; }
.key-row:first-of-type { border-top: none; }
.key-row .k-label { font-size: 12px; color: #5c5648; }
.key-row .k-value { font-family: var(--font-mono); font-size: 13px; word-break: break-all; }
.key-row .copy-btn { position: static; background: #ffffff; border-color: #cfc8b6; color: #5c5648; }
.form-error { color: var(--danger); font-size: 13px; margin-top: -6px; margin-bottom: 14px; }

/* reference */
.ref-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin-bottom: 20px; }
.ref-card { border: 1px solid var(--navy-700); border-radius: 4px; padding: 16px 18px; }
.ref-card h3 { font-size: 14.5px; margin-bottom: 8px; }
.ref-card ul { margin: 0; padding: 0; list-style: none; }
.ref-card li { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-lo); padding: 3px 0; }
.ref-card .m { color: var(--teal); margin-right: 6px; }

/* dashboard */
.dash-form { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; margin-bottom: 20px; }
.dash-form .field input { width: 320px; }
.dash-panel { background: var(--navy-800); border: 1px solid var(--navy-700); border-radius: 4px; padding: 20px 22px; margin-bottom: 16px; }
.dash-panel h3 { font-size: 14px; margin-bottom: 12px; color: var(--text-lo); font-weight: 500; }
.dash-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; }
.dash-item .k-label { font-size: 11.5px; color: var(--text-lo); margin-bottom: 3px; }
.dash-item .k-value { font-family: var(--font-mono); font-size: 14px; color: var(--text-hi); }
.events-table { width: 100%; border-collapse: collapse; font-family: var(--font-mono); font-size: 12.5px; }
.events-table th { text-align: left; color: var(--text-lo); font-weight: 500; padding: 8px 10px; border-bottom: 1px solid var(--navy-700); }
.events-table td { padding: 8px 10px; border-bottom: 1px solid #16283b; color: var(--text-hi); }
.tag { display: inline-block; padding: 2px 7px; border-radius: 3px; font-size: 11px; }
.tag.ok { background: rgba(95,214,196,0.15); color: var(--teal); }
.tag.pending { background: rgba(242,166,61,0.15); color: var(--amber); }

footer { border-top: 1px solid var(--navy-700); padding: 32px 0 44px; margin-top: 20px; }
.foot-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; font-size: 13px; color: var(--text-lo); }
.foot-links { display: flex; gap: 18px; }
.foot-links a { color: var(--text-lo); }
.foot-links a:hover { color: var(--text-hi); }

@media (max-width: 640px) {
  .wrap { padding: 0 18px; }
  .nav-links { gap: 14px; }
  .board-row { grid-template-columns: 52px 1fr 48px; }
  .board-row .time { display: none; }
}