/* Nexus-BS 2.0 project site. Same palette as the station dashboard. */
:root {
  --bg: #0a0e15;
  --bg-2: #0f141d;
  --panel: #121926;
  --line: #1f2a3a;
  --text: #e6ebf2;
  --muted: #8b97a8;
  --faint: #5d6a7c;
  --tetra: #4c8dff;
  --dmr: #a970ff;
  --p25: #22c7a9;
  --fm: #f5a524;
  --accent: #4c8dff;
  --code-bg: #0c1119;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f6f7f9;
    --bg-2: #eef1f5;
    --panel: #ffffff;
    --line: #dde3eb;
    --text: #111722;
    --muted: #556173;
    --faint: #7c8796;
    --code-bg: #f1f4f8;
    --shadow: 0 24px 60px rgba(20, 30, 50, 0.12);
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #f6f7f9; --bg-2: #eef1f5; --panel: #ffffff; --line: #dde3eb; --text: #111722;
  --muted: #556173; --faint: #7c8796; --code-bg: #f1f4f8; --shadow: 0 24px 60px rgba(20, 30, 50, 0.12);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre, .mono { font-family: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace; }
img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* Top bar */
.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; letter-spacing: 0.02em; }
.brand:hover { text-decoration: none; }
.brand img { width: 28px; height: 28px; border-radius: 6px; }
.brand .ver { font: 600 13px "JetBrains Mono", monospace; color: var(--accent); }
.top nav { margin-left: auto; display: flex; gap: 22px; font-size: 14px; }
.top nav a { color: var(--muted); }
.top nav a:hover, .top nav a[aria-current] { color: var(--text); text-decoration: none; }

/* Hero */
.hero { padding-top: 88px; padding-bottom: 48px; text-align: center; }
.eyebrow {
  display: inline-flex; gap: 10px; align-items: center;
  font: 600 12px "JetBrains Mono", monospace; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted);
}
.eyebrow i { width: 8px; height: 8px; border-radius: 2px; display: inline-block; }
.hero h1 { font-size: clamp(38px, 6vw, 64px); line-height: 1.05; margin: 20px auto 18px; max-width: 900px; letter-spacing: -0.02em; }
.hero h1 .grad {
  background: linear-gradient(90deg, var(--tetra), var(--dmr) 40%, var(--p25) 70%, var(--fm));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { font-size: 19px; color: var(--muted); max-width: 720px; margin: 0 auto 32px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 10px;
  font-weight: 600; font-size: 15px; border: 1px solid var(--line); color: var(--text); background: var(--panel);
}
.btn:hover { text-decoration: none; border-color: var(--faint); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }

.shot { margin: 56px auto 0; max-width: 100%; border-radius: 14px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); }
.shot-note { text-align: center; color: var(--faint); font-size: 13px; margin-top: 12px; }

/* Sections */
section { padding: 72px 0; border-top: 1px solid var(--line); }
section h2 { font-size: 30px; line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 10px; }
section .sub { color: var(--muted); max-width: 720px; margin: 0 0 36px; }

.modes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.mode { background: var(--panel); border: 1px solid var(--line); border-top: 3px solid var(--c); border-radius: 12px; padding: 22px; }
.mode .tag {
  display: inline-block; font: 700 12px "JetBrains Mono", monospace; letter-spacing: 0.08em;
  color: var(--c); background: color-mix(in srgb, var(--c) 14%, transparent); padding: 3px 9px; border-radius: 6px;
}
.mode h3 { margin: 14px 0 8px; font-size: 18px; }
.mode ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 14.5px; }
.mode li { margin: 4px 0; }

.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.card .k { font: 600 12px "JetBrains Mono", monospace; color: var(--faint); letter-spacing: 0.1em; text-transform: uppercase; }

.shots2 { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; align-items: start; }
.shots2 figure { margin: 0; }
.shots2 img { border-radius: 12px; border: 1px solid var(--line); }
.shots2 figcaption { color: var(--faint); font-size: 13px; margin-top: 8px; }

.touch-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.touch-grid figure { margin: 0; }
.touch-grid img { border-radius: 10px; border: 1px solid var(--line); width: 100%; image-rendering: auto; }
.touch-grid figcaption { color: var(--faint); font-size: 13px; margin-top: 8px; }
.docs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.doc { display: block; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 22px; color: var(--text); }
.doc:hover { text-decoration: none; border-color: var(--accent); }
.doc h3 { margin: 0 0 6px; font-size: 17px; }
.doc p { margin: 0; color: var(--muted); font-size: 14.5px; }
.doc .langs { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; }
.doc .langs a { font: 600 12px "JetBrains Mono", monospace; padding: 3px 8px; border: 1px solid var(--line); border-radius: 6px; }

.note { background: var(--bg-2); border: 1px solid var(--line); border-radius: 12px; padding: 18px 22px; color: var(--muted); font-size: 14.5px; }

footer { border-top: 1px solid var(--line); padding: 36px 0 56px; color: var(--faint); font-size: 13.5px; }
footer .wrap { display: flex; gap: 24px; flex-wrap: wrap; justify-content: space-between; }

/* Documentation pages */
.docpage { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 48px; padding: 40px 0 80px; }
.toc { position: sticky; top: 84px; align-self: start; max-height: calc(100vh - 110px); overflow: auto; font-size: 13.5px; }
.toc b { display: block; font: 600 12px "JetBrains Mono", monospace; color: var(--faint); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 10px; }
.toc a { display: block; color: var(--muted); padding: 4px 0; }
.toc a:hover { color: var(--text); text-decoration: none; }
.toc .langsel { margin-bottom: 18px; display: flex; gap: 6px; flex-wrap: wrap; }
.toc .langsel a { display: inline-block; font: 600 12px "JetBrains Mono", monospace; padding: 2px 7px; border: 1px solid var(--line); border-radius: 6px; }
.toc .langsel a[aria-current] { color: var(--text); border-color: var(--accent); }
.prose { min-width: 0; }
.prose h1 { font-size: 36px; letter-spacing: -0.01em; line-height: 1.15; margin: 0 0 24px; }
.prose h2 { font-size: 24px; margin: 48px 0 14px; padding-top: 12px; border-top: 1px solid var(--line); scroll-margin-top: 80px; }
.prose h3 { font-size: 18px; margin: 32px 0 10px; scroll-margin-top: 80px; }
.prose p, .prose li { color: color-mix(in srgb, var(--text) 88%, var(--muted)); }
.prose code { background: var(--code-bg); border: 1px solid var(--line); padding: 1px 5px; border-radius: 5px; font-size: 0.88em; }
.prose pre { background: var(--code-bg); border: 1px solid var(--line); border-radius: 10px; padding: 16px; overflow-x: auto; font-size: 13.5px; line-height: 1.5; }
.prose pre code { background: none; border: 0; padding: 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14.5px; display: block; overflow-x: auto; }
.prose th, .prose td { border-bottom: 1px solid var(--line); padding: 8px 12px; text-align: left; vertical-align: top; }
.prose th { color: var(--muted); font-weight: 600; font-size: 13px; }
.prose blockquote { margin: 16px 0; padding: 4px 18px; border-left: 3px solid var(--accent); color: var(--muted); }

@media (max-width: 960px) {
  .modes { grid-template-columns: repeat(2, 1fr); }
  .grid3 { grid-template-columns: 1fr; }
  .shots2 { grid-template-columns: 1fr; }
  .docpage { grid-template-columns: 1fr; gap: 16px; }
  .toc { position: static; max-height: none; border-bottom: 1px solid var(--line); padding-bottom: 12px; }
  .toc .items { display: none; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .top nav { gap: 14px; font-size: 13px; }
  .top nav .hide-sm { display: none; }
  .hero { padding-top: 56px; padding-bottom: 32px; }
  .modes, .docs, .touch-grid { grid-template-columns: 1fr; }
  section { padding: 52px 0; }
}