/* SeaSignals — shared styles */

:root {
  --bg: #03101c;
  --bg-2: #06192b;
  --bg-3: #0a2238;
  --surface: rgba(140, 190, 255, 0.04);
  --surface-2: rgba(140, 190, 255, 0.08);
  --border: rgba(140, 190, 255, 0.13);
  --border-strong: rgba(140, 190, 255, 0.24);
  --text: #e6f1fb;
  --muted: #8ea7bf;
  --dim: #5f7a93;

  --accent: #2ee6c9;
  --accent-ink: #022a25;
  --vessel: #2ee6c9;
  --storm: #ff7a59;
  --wave: #6cb8ff;
  --port: #ffc857;
  --wild: #a593ff;

  --radius: 14px;
  --radius-lg: 22px;
  --max: 1180px;
  --gutter: clamp(16px, 4vw, 40px);

  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1em; }
h1, h2, h3, h4 { margin: 0 0 0.5em; line-height: 1.15; letter-spacing: -0.02em; font-weight: 700; }
h1 { font-size: clamp(2.4rem, 6vw, 4.6rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.8rem); }
h3 { font-size: 1.2rem; letter-spacing: -0.01em; }
code, pre { font-family: var(--mono); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: clamp(64px, 10vw, 120px) 0; position: relative; }
.section--tight { padding: clamp(40px, 6vw, 72px) 0; }
.section--alt { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 18%, var(--bg-2) 82%, var(--bg) 100%); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; box-shadow: 0 0 12px currentColor; }

.lead { font-size: clamp(1.05rem, 1.6vw, 1.25rem); color: var(--muted); max-width: 640px; }
.muted { color: var(--muted); }
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }
.section-head { max-width: 720px; margin-bottom: clamp(36px, 5vw, 56px); }
.section-head.center { margin-left: auto; margin-right: auto; }

.grad {
  background: linear-gradient(100deg, var(--accent) 0%, var(--wave) 50%, var(--wild) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px;
  font-weight: 600; font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer; white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 8px 30px -10px rgba(46, 230, 201, 0.6); }
.btn--primary:hover { box-shadow: 0 10px 36px -8px rgba(46, 230, 201, 0.75); }
.btn--ghost { border-color: var(--border-strong); color: var(--text); background: rgba(255, 255, 255, 0.02); }
.btn--ghost:hover { border-color: var(--accent); background: rgba(46, 230, 201, 0.06); }
.btn--sm { padding: 8px 16px; font-size: 0.875rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- Header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(3, 16, 28, 0.72);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.site-header.scrolled { border-bottom-color: var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.1rem; letter-spacing: -0.02em; }
.brand svg { width: 30px; height: 30px; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: 999px; color: var(--muted); font-size: 0.93rem; font-weight: 500;
  transition: color 0.15s ease, background 0.15s ease;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); background: var(--surface-2); }
.nav-cta { margin-left: 8px; }
.nav-links .btn--primary, .nav-links .btn--primary:hover { color: var(--accent-ink); background: var(--accent); }
.badge {
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 2px 7px; border-radius: 999px;
  background: rgba(165, 147, 255, 0.16); color: var(--wild); border: 1px solid rgba(165, 147, 255, 0.3);
}
.nav-toggle { display: none; background: none; border: 1px solid var(--border-strong); border-radius: 10px; color: var(--text); width: 42px; height: 42px; cursor: pointer; }
.nav-toggle svg { margin: auto; }

@media (max-width: 860px) {
  .nav-toggle { display: grid; place-items: center; }
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    padding: 12px var(--gutter) 20px;
    background: rgba(3, 16, 28, 0.97); border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; }
  .nav-cta { margin: 8px 0 0; }
  .nav-cta .btn { width: 100%; }
}

/* ---------- Hero ---------- */

.hero { position: relative; min-height: min(92vh, 860px); display: flex; align-items: center; overflow: hidden; padding: 80px 0 100px; }
.hero--page { min-height: 0; padding: clamp(72px, 12vw, 140px) 0 clamp(56px, 8vw, 96px); }
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 60% 50% at 20% 40%, rgba(3, 16, 28, 0.85), transparent 70%),
    linear-gradient(180deg, transparent 60%, var(--bg) 100%);
}
.hero .container { position: relative; z-index: 1; }
.hero h1 { max-width: 880px; }
.hero .lead { margin-bottom: 32px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 40px; color: var(--dim); font-family: var(--mono); font-size: 0.8rem; }
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; flex: none; }
.dot--vessel { background: var(--vessel); }
.dot--storm { background: var(--storm); }
.dot--wave { background: var(--wave); }
.dot--port { background: var(--port); }
.dot--wild { background: var(--wild); }

/* ---------- Cards & grids ---------- */

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
@media (max-width: 1020px) { .grid-5 { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 860px) { .grid-3, .grid-5 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .grid-2, .grid-3, .grid-5 { grid-template-columns: minmax(0, 1fr); } }

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}
a.card:hover { border-color: var(--border-strong); background: var(--surface-2); transform: translateY(-2px); }
.card p { color: var(--muted); margin-bottom: 0; font-size: 0.95rem; }
.card h3 { margin-bottom: 8px; }
.card .more { display: inline-flex; margin-top: 16px; font-size: 0.88rem; font-weight: 600; color: var(--accent); }

.icon {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 18px;
  background: var(--surface-2); border: 1px solid var(--border);
}
.icon svg { width: 22px; height: 22px; }

.layer-card { --c: var(--accent); }
.layer-card::before {
  content: ""; position: absolute; left: 26px; right: 26px; top: -1px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--c), transparent); opacity: 0.8;
}
.layer-card .icon { color: var(--c); background: color-mix(in srgb, var(--c) 12%, transparent); border-color: color-mix(in srgb, var(--c) 30%, transparent); }
.layer-card .tag { font-family: var(--mono); font-size: 0.72rem; color: var(--c); letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 6px; display: block; }
.c-vessel { --c: var(--vessel); }
.c-storm { --c: var(--storm); }
.c-wave { --c: var(--wave); }
.c-port { --c: var(--port); }
.c-wild { --c: var(--wild); }

/* ---------- Layer chips strip ---------- */

.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--surface); font-size: 0.88rem; color: var(--muted);
}
.center .chips { justify-content: center; }

/* ---------- Split layouts ---------- */

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 72px); align-items: center; }
.split--rev { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
@media (max-width: 900px) {
  .split, .split--rev { grid-template-columns: minmax(0, 1fr); }
  .split--rev > :first-child { order: 2; }
}

.checklist { list-style: none; margin: 24px 0 32px; padding: 0; display: grid; gap: 12px; }
.checklist li { display: flex; gap: 12px; color: var(--muted); }
.checklist li::before {
  content: ""; flex: none; width: 18px; height: 18px; margin-top: 4px; border-radius: 50%;
  background: rgba(46, 230, 201, 0.14) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232ee6c9' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5 9-10'/%3E%3C/svg%3E") center / 11px no-repeat;
}
.checklist strong { color: var(--text); font-weight: 600; }

/* ---------- Code window ---------- */

.code-window {
  background: #020b14; border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.8);
}
.code-bar {
  display: flex; align-items: center; gap: 8px; padding: 12px 16px;
  border-bottom: 1px solid var(--border); background: rgba(255, 255, 255, 0.02);
  font-family: var(--mono); font-size: 0.78rem; color: var(--dim);
}
.code-bar i { width: 10px; height: 10px; border-radius: 50%; background: #1d3347; display: inline-block; }
.code-bar .title { margin-left: 8px; }
.code-window pre { margin: 0; padding: 20px 22px; overflow-x: auto; font-size: 0.84rem; line-height: 1.7; color: #c9dcee; }
.tk-k { color: #ff9eb8; }
.tk-s { color: #9de6a8; }
.tk-n { color: #ffc857; }
.tk-c { color: #4d6a85; font-style: italic; }
.tk-f { color: #6cb8ff; }
.tk-p { color: #2ee6c9; }

.tabs { display: flex; gap: 4px; margin-left: auto; }
.tab {
  background: none; border: 0; color: var(--dim); font: inherit; font-size: 0.78rem; cursor: pointer;
  padding: 4px 10px; border-radius: 6px;
}
.tab[aria-selected="true"] { color: var(--text); background: var(--surface-2); }
.tab-panel[hidden] { display: none; }

/* ---------- Stack diagram (dataset) ---------- */

.stack { position: relative; height: 380px; perspective: 1200px; }
.stack-layer {
  position: absolute; left: 8%; right: 8%; height: 150px;
  border-radius: 20px; border: 1px solid color-mix(in srgb, var(--c) 45%, transparent);
  background:
    radial-gradient(circle at 30% 40%, color-mix(in srgb, var(--c) 30%, transparent), transparent 60%),
    color-mix(in srgb, var(--c) 7%, rgba(3, 16, 28, 0.85));
  transform: rotateX(62deg) rotateZ(-38deg);
  display: flex; align-items: flex-end; justify-content: flex-end; padding: 14px 18px;
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.9);
  transition: transform 0.4s ease;
}
.stack-layer span {
  font-family: var(--mono); font-size: 0.8rem; color: var(--c); letter-spacing: 0.04em;
  transform: rotateZ(38deg) rotateX(-62deg); transform-origin: right bottom;
}
.stack-layer:nth-child(1) { top: 0; }
.stack-layer:nth-child(2) { top: 46px; }
.stack-layer:nth-child(3) { top: 92px; }
.stack-layer:nth-child(4) { top: 138px; }
.stack-layer:nth-child(5) { top: 184px; }
.stack-layer:nth-child(6) { top: 230px; border-style: dashed; }
.stack:hover .stack-layer:nth-child(1) { transform: rotateX(62deg) rotateZ(-38deg) translateZ(30px); }
.stack:hover .stack-layer:nth-child(2) { transform: rotateX(62deg) rotateZ(-38deg) translateZ(18px); }
.stack:hover .stack-layer:nth-child(3) { transform: rotateX(62deg) rotateZ(-38deg) translateZ(6px); }

/* ---------- Tables ---------- */

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--dim); font-weight: 500; background: rgba(255, 255, 255, 0.02); }
tr:last-child td { border-bottom: 0; }
td code { color: var(--accent); font-size: 0.82rem; }
td.muted { color: var(--muted); }

/* ---------- Layer detail blocks (dataset page) ---------- */

.layer-detail {
  display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(28px, 5vw, 56px);
  padding: clamp(40px, 6vw, 64px) 0; border-top: 1px solid var(--border);
  scroll-margin-top: 80px;
}
.layer-detail:first-of-type { border-top: 0; }
.layer-detail.layer-card::before { display: none; }
@media (max-width: 900px) { .layer-detail { grid-template-columns: minmax(0, 1fr); } }
.layer-detail h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
.facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 24px; }
.fact { padding: 14px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.fact b { display: block; font-size: 0.72rem; font-family: var(--mono); color: var(--dim); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 500; margin-bottom: 4px; }
.fact span { font-size: 0.92rem; }
@media (max-width: 480px) { .facts { grid-template-columns: minmax(0, 1fr); } }

.subnav { position: sticky; top: 68px; z-index: 20; background: rgba(3, 16, 28, 0.9); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.subnav .chips { flex-wrap: nowrap; overflow-x: auto; padding: 12px 0; scrollbar-width: none; }
.subnav .chips::-webkit-scrollbar { display: none; }
.subnav .chip { white-space: nowrap; }
.subnav .chip:hover { color: var(--text); border-color: var(--border-strong); }

/* ---------- Endpoint list ---------- */

.endpoints { display: grid; gap: 8px; }
.endpoint {
  display: grid; grid-template-columns: 64px minmax(0, 1fr) minmax(0, 1.2fr); gap: 16px; align-items: center;
  padding: 14px 18px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface);
  font-size: 0.9rem;
}
.endpoint .method { font-family: var(--mono); font-size: 0.72rem; font-weight: 700; color: var(--accent); }
.endpoint .method.ws { color: var(--wild); }
.endpoint .method.post { color: var(--port); }
.endpoint code { color: var(--text); word-break: break-all; }
.endpoint span:last-child { color: var(--muted); }
@media (max-width: 700px) { .endpoint { grid-template-columns: 56px minmax(0, 1fr); } .endpoint span:last-child { grid-column: 1 / -1; } }

/* ---------- Voyage (3D teaser) ---------- */

.voyage-frame {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border-strong);
  aspect-ratio: 16 / 10; min-height: 300px;
  background: linear-gradient(180deg, #0b2a44 0%, #061a2c 55%, #03101c 100%);
  box-shadow: 0 40px 100px -40px rgba(46, 230, 201, 0.25);
}
.voyage-frame--full { aspect-ratio: auto; height: min(78vh, 760px); }
.voyage-frame canvas { width: 100% !important; height: 100% !important; }
.voyage-fallback { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; padding: 24px; color: var(--muted); font-size: 0.9rem; }
.hud { position: absolute; pointer-events: none; font-family: var(--mono); font-size: 0.72rem; color: var(--text); }
.hud-tl { top: 14px; left: 14px; display: grid; gap: 4px; }
.hud-tr { top: 14px; right: 14px; }
.hud-bl { bottom: 14px; left: 14px; right: 14px; }
.hud-pill { display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; border-radius: 999px; background: rgba(2, 11, 20, 0.7); border: 1px solid var(--border); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.hud-pill .live { width: 6px; height: 6px; border-radius: 50%; background: var(--storm); box-shadow: 0 0 8px var(--storm); animation: pulse 1.6s infinite; }
.ticker { display: grid; gap: 6px; max-width: 420px; }
.ticker-item {
  display: flex; align-items: center; gap: 8px; padding: 7px 11px; border-radius: 10px;
  background: rgba(2, 11, 20, 0.72); border: 1px solid var(--border);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  animation: tickIn 0.5s ease both;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.ticker-item time { color: var(--dim); }
.ticker-note { margin-top: 2px; color: var(--dim); font-size: 0.66rem; }
@media (max-width: 600px) { .hud { font-size: 0.64rem; } .ticker-item:nth-child(n + 3) { display: none; } }

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
@keyframes tickIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.roadmap { display: grid; gap: 0; border-left: 1px solid var(--border-strong); margin-left: 8px; }
.roadmap-step { position: relative; padding: 0 0 32px 28px; }
.roadmap-step::before { content: ""; position: absolute; left: -6px; top: 6px; width: 11px; height: 11px; border-radius: 50%; background: var(--bg); border: 2px solid var(--dim); }
.roadmap-step.active::before { border-color: var(--accent); background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.roadmap-step .when { font-family: var(--mono); font-size: 0.74rem; color: var(--dim); letter-spacing: 0.06em; text-transform: uppercase; }
.roadmap-step h3 { margin: 4px 0 6px; }
.roadmap-step p { color: var(--muted); margin: 0; font-size: 0.95rem; }

/* ---------- CTA band ---------- */

.cta-band {
  position: relative; overflow: hidden;
  border: 1px solid var(--border-strong); border-radius: 28px;
  padding: clamp(40px, 7vw, 80px) clamp(24px, 5vw, 64px);
  background:
    radial-gradient(ellipse 70% 90% at 100% 0%, rgba(46, 230, 201, 0.16), transparent 60%),
    radial-gradient(ellipse 60% 80% at 0% 100%, rgba(108, 184, 255, 0.14), transparent 60%),
    var(--bg-2);
  text-align: center;
}
.cta-band .lead { margin: 0 auto 28px; }
.cta-band .btn-row { justify-content: center; }

/* ---------- Footer ---------- */

.site-footer { border-top: 1px solid var(--border); padding: 48px 0 40px; color: var(--muted); font-size: 0.9rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px; }
.footer-grid h4 { font-size: 0.78rem; font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--dim); font-weight: 500; margin-bottom: 14px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.footer-grid a:hover { color: var(--text); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); font-size: 0.82rem; color: var(--dim); }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-grid > :first-child { grid-column: 1 / -1; } }

/* ---------- Reveal on scroll ---------- */

.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hud-pill .live, .ticker-item { animation: none; }
}

/* ---------- Legal pages ---------- */

.legal { max-width: 760px; }
.legal h2 { font-size: clamp(1.25rem, 2.4vw, 1.55rem); margin: 44px 0 12px; }
.legal h2:first-child { margin-top: 0; }
.legal p, .legal li { color: var(--muted); }
.legal ul { padding-left: 20px; display: grid; gap: 8px; margin: 0 0 16px; }
.legal strong { color: var(--text); }
.legal a { color: var(--accent); }
.footer-bottom a { color: inherit; text-decoration: underline; text-underline-offset: 3px; }