:root {
  --bg: #05070d;
  --ink: #e8f4fb;
  --muted: #8ea6b8;
  --line: rgba(148, 210, 240, 0.16);
  --accent: #7dd3fc;
  --accent-deep: #0ea5e9;
  --code: rgba(4, 10, 18, 0.72);
  --code-text: #e7f2f8;
  --bar: rgba(148, 210, 240, 0.14);
  --mono: "Fira Code", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.65;
  font-feature-settings: "liga" 0, "calt" 0;
}

.sea {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(900px 420px at 50% -10%, rgba(14, 165, 233, 0.16), transparent 60%),
    #05070d;
}
.sea span {
  position: absolute;
  border-radius: 50%;
  filter: blur(28px);
  opacity: 0.7;
  mix-blend-mode: screen;
  animation: drift 20s ease-in-out infinite;
}
.sea span:nth-child(1) {
  width: 46vw; height: 46vw; left: -12vw; top: -8vw;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.55), transparent 68%);
}
.sea span:nth-child(2) {
  width: 36vw; height: 36vw; right: -8vw; top: 18vh;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.38), transparent 70%);
  animation-duration: 26s;
  animation-delay: -8s;
}
.sea span:nth-child(3) {
  width: 40vw; height: 28vw; left: 24vw; bottom: -12vw;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.45), transparent 70%);
  animation-duration: 32s;
  animation-delay: -14s;
}
@keyframes drift {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(4vw, 3vh, 0) scale(1.08); }
}
@media (prefers-reduced-motion: reduce) {
  .sea span { animation: none; }
}

.nav, main, .footer { position: relative; z-index: 1; }

.wrap { max-width: 880px; margin: 0 auto; padding: 0 24px; }
.muted { color: var(--muted); }
a { color: var(--accent); text-underline-offset: 3px; transition: color .2s ease; }
a:hover { color: #fff; }
strong { font-weight: 600; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(5, 8, 14, 0.55);
  backdrop-filter: blur(18px) saturate(1.5);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; min-height: 56px; gap: 16px; }
.brand {
  color: var(--ink); font-weight: 600; font-size: 15px; line-height: 1;
  text-decoration: none; display: inline-flex; align-items: center; gap: 10px;
  height: 32px;
}
.brand-mark {
  width: 42px; height: auto; display: block; flex: 0 0 auto;
  transition: filter .3s ease, transform .3s ease;
}
.brand:hover .brand-mark {
  filter: drop-shadow(0 0 8px rgba(0, 117, 255, 0.55));
  transform: translateY(-1px);
}
.nav nav { display: flex; gap: 4px; flex-wrap: wrap; align-items: center; }
.nav nav a {
  position: relative;
  color: var(--muted); text-decoration: none; font-size: 13px;
  padding: 6px 10px;
  transition: color .2s ease;
}
.nav nav a::after {
  content: "";
  position: absolute; left: 10px; right: 10px; bottom: 2px; height: 1px;
  background: linear-gradient(90deg, transparent, #7dd3fc, transparent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .35s ease;
}
.nav nav a:hover { color: #fff; }
.nav nav a:hover::after, .nav nav a.active::after { transform: scaleX(1); }
.nav nav a.active { color: var(--ink); }

.banner {
  position: relative; z-index: 1;
  margin: 0; padding: 8px 16px; text-align: center;
  font-size: 12px; letter-spacing: 0.06em;
  color: #fde68a;
  background: rgba(120, 70, 10, 0.35);
  border-bottom: 1px solid rgba(251, 191, 36, 0.35);
}

/* ---------- hero ---------- */
.hero { padding: 72px 0 8px; }
.kicker {
  display: flex; align-items: center; gap: 10px;
  color: var(--muted); font-size: 13px; margin: 0 0 22px;
}
.kicker img { width: 48px; height: auto; display: block; flex: 0 0 auto; }
.hero h1 {
  font-size: 42px; font-weight: 500; letter-spacing: -0.8px;
  line-height: 1.12; margin: 0 0 16px;
  text-shadow: 0 0 40px rgba(56, 189, 248, 0.25);
}
.hero p.lead { max-width: 38em; margin: 0 0 22px; color: #d5e6f0; }
.hero-cta { display: flex; gap: 10px; flex-wrap: wrap; margin: 0 0 36px; }

.btn {
  position: relative; overflow: hidden;
  display: inline-block; padding: 8px 14px;
  font-family: inherit; font-size: 13px; text-decoration: none;
  border: 1px solid rgba(125, 211, 252, 0.4);
  color: var(--ink);
  background: rgba(14, 165, 233, 0.06);
  transition: border-color .25s ease, box-shadow .25s ease, color .25s ease, transform .25s ease;
}
.btn::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(105deg, transparent 30%, rgba(186, 242, 255, 0.4) 48%, transparent 66%);
  transform: translateX(-130%);
  transition: transform .6s ease;
}
.btn:hover {
  color: #fff;
  border-color: #7dd3fc;
  box-shadow: 0 0 22px rgba(14, 165, 233, 0.35);
  transform: translateY(-1px);
}
.btn:hover::before { transform: translateX(130%); }
.btn-primary {
  background: linear-gradient(180deg, rgba(56, 189, 248, 0.28), rgba(14, 165, 233, 0.08));
  border-color: rgba(125, 211, 252, 0.7);
}

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(125, 211, 252, 0.35);
  border-bottom: 1px solid var(--line);
  margin: 0;
  background: linear-gradient(180deg, rgba(14, 165, 233, 0.06), transparent);
}
.stats div { padding: 14px 16px 16px 0; transition: background .3s ease; }
.stats div:hover { background: linear-gradient(180deg, rgba(125, 211, 252, 0.08), transparent); }
.stats dt { color: var(--muted); font-size: 12px; font-weight: 400; margin: 0 0 4px; }
.stats dd { margin: 0; font-size: 18px; font-weight: 500; }
@media (max-width: 700px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 30px; }
}

/* ---------- sections ---------- */
section.block { padding: 48px 0 8px; }
h2.sec { font-size: 13px; font-weight: 500; color: var(--accent); margin: 0 0 4px; letter-spacing: 0.04em; }
p.sec-sub { margin: 0 0 16px; }
p.follow { margin: 14px 0 0; color: var(--muted); }

.spec { margin: 0; border-top: 1px solid var(--line); }
.spec > div {
  display: grid; grid-template-columns: 120px 1fr;
  gap: 16px; padding: 13px 12px;
  border-bottom: 1px solid var(--line);
  transition: background .35s ease, box-shadow .35s ease;
}
.spec > div:hover {
  background: linear-gradient(90deg, rgba(14, 165, 233, 0.16), transparent 72%);
  box-shadow: inset 2px 0 0 #38bdf8;
}
.spec dt { margin: 0; color: var(--muted); font-size: 13px; }
.spec dd { margin: 0; }
@media (max-width: 600px) { .spec > div { grid-template-columns: 1fr; gap: 2px; } }

/* ---------- code ---------- */
code {
  font-family: var(--mono);
  font-feature-settings: "liga" 1, "calt" 1;
  font-size: 0.92em;
  background: rgba(125, 211, 252, 0.1);
  color: #d7f4ff;
  padding: 0 4px;
}
pre {
  background: var(--code); color: var(--code-text);
  margin: 0; padding: 16px 18px; overflow-x: auto; line-height: 1.7;
  backdrop-filter: blur(8px);
  transition: box-shadow .3s ease;
}
pre:hover { box-shadow: inset 0 0 0 1px rgba(125, 211, 252, 0.25), 0 0 28px rgba(14, 165, 233, 0.12); }
pre code { background: none; padding: 0; font-size: 13.5px; color: inherit; }
.k { color: #fff; font-weight: 600; }
.t { color: #b9e6fb; }
.s { color: #d5e7cf; }
.n { color: var(--code-text); }
.c { color: #7f93a3; }
.f { color: #b9e6fb; }

.file {
  display: flex; justify-content: space-between; align-items: baseline;
  border: 1px solid var(--line); border-bottom: none;
  padding: 6px 12px; font-size: 12px; color: var(--muted);
  background: rgba(8, 16, 28, 0.55);
}
.file + pre { border: 1px solid var(--line); }

.os-switch {
  border: 1px solid var(--line);
  background: rgba(8, 16, 28, 0.45);
}
.os-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 6px 8px; border-bottom: 1px solid var(--line);
}
.os-tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.os-tabs button, .copy-btn {
  font-family: inherit; font-size: 12px; cursor: pointer;
  color: var(--muted); background: transparent;
  border: 1px solid transparent; padding: 5px 10px;
  transition: color .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease;
}
.os-tabs button:hover, .copy-btn:hover { color: #fff; }
.os-tabs button[aria-selected="true"] {
  color: var(--ink);
  border-color: rgba(125, 211, 252, 0.5);
  background: rgba(14, 165, 233, 0.14);
  box-shadow: 0 0 16px rgba(14, 165, 233, 0.2);
}
.copy-btn { border-color: rgba(125, 211, 252, 0.35); }
.copy-btn:hover {
  border-color: #7dd3fc;
  box-shadow: 0 0 16px rgba(14, 165, 233, 0.35);
}
.os-switch pre { border: none; }
.os-note {
  margin: 0; padding: 8px 14px 12px;
  color: var(--muted); font-size: 13px;
  border-top: 1px solid var(--line);
}

.quickstart { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; align-items: stretch; }
.quickstart > div { display: flex; flex-direction: column; }
.quickstart pre { flex: 1; }
@media (max-width: 760px) { .quickstart { grid-template-columns: 1fr; } }

/* ---------- docs ---------- */
.doc-layout { display: grid; grid-template-columns: 180px 1fr; gap: 48px; padding: 40px 0 8px; }
@media (max-width: 760px) { .doc-layout { grid-template-columns: 1fr; } .doc-toc { display: none; } }
.doc-toc { position: sticky; top: 76px; align-self: start; font-size: 12px; }
.doc-toc .toc-title { color: var(--muted); margin-bottom: 8px; }
.doc-toc a {
  display: block; color: var(--muted); text-decoration: none;
  padding: 4px 0 4px 10px; border-left: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease, padding-left .2s ease;
}
.doc-toc a:hover { color: #fff; border-left-color: #38bdf8; padding-left: 14px; }
.doc h1 { font-size: 28px; font-weight: 500; letter-spacing: -0.4px; margin: 0 0 10px; }
.doc h2 {
  font-size: 16px; font-weight: 600; margin: 36px 0 8px;
  padding-top: 16px; border-top: 1px solid var(--line);
}
.doc h3 { font-size: 14px; font-weight: 600; margin: 0 0 6px; }
.doc p { margin: 0 0 12px; }
.doc ul { margin: 0 0 12px; padding-left: 18px; }
.doc li { margin: 4px 0; }
.doc table { border-collapse: collapse; width: 100%; margin: 12px 0 16px; font-size: 13.5px; }
.doc th, .doc td { padding: 8px 10px 8px 0; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc th { color: var(--muted); font-weight: 500; border-bottom-color: rgba(125, 211, 252, 0.45); }
.doc tr { transition: background .25s ease; }
.doc tbody tr:hover { background: rgba(14, 165, 233, 0.08); }
.doc td.marina { font-weight: 600; color: var(--accent); }
.doc blockquote {
  margin: 12px 0 16px; padding: 0 0 0 14px;
  border-left: 2px solid var(--accent); color: var(--muted);
}
.page { padding-top: 40px; }

/* ---------- progress bars ---------- */
.bench-card { padding: 8px 0 28px; }
.bench-card h3 { margin: 22px 0 2px; font-size: 15px; font-weight: 600; }
.bench-sub { color: var(--muted); font-size: 13px; margin: 0 0 14px; }
.bar-row {
  display: grid; grid-template-columns: 168px 1fr auto; align-items: center; gap: 14px;
  margin-bottom: 9px; padding: 4px 8px;
  transition: background .3s ease;
}
.bar-row:hover { background: linear-gradient(90deg, rgba(14, 165, 233, 0.12), transparent 80%); }
.bar-row.slim { grid-template-columns: 64px 1fr auto; }
@media (max-width: 640px) { .bar-row { grid-template-columns: 108px 1fr auto; gap: 8px; } }
.bar-name { font-size: 13px; }
.bar-name.marina { font-weight: 600; color: var(--accent); }
.bar-track { background: var(--bar); height: 8px; overflow: hidden; }
.bar-fill { height: 100%; background: #3d5366; transition: filter .3s ease; }
.bar-fill.marina {
  background: linear-gradient(90deg, #0284c7, #7dd3fc);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.55);
}
.bar-row:hover .bar-fill.marina { filter: brightness(1.15); }
.bar-val { font-size: 12px; color: var(--muted); text-align: right; white-space: nowrap; }
.bar-val strong { color: var(--ink); font-weight: 600; }
.note { color: var(--muted); font-weight: 400; font-size: 12px; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); margin-top: 64px; background: rgba(5, 8, 14, 0.4); }
.foot {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 18px 0 28px; color: var(--muted); font-size: 12px;
}
.foot p { margin: 0; }