/* neutron-site — "datasheet for a component you install".
   Dark-first blueprint charcoal, amber reactor accent, mono-led technical
   language. Theme-aware (mirrors the product's own light/dark). */

:root {
  --bg: #0c0e12;
  --bg-2: #101319;
  --panel: #14181f;
  --panel-2: #171c24;
  --line: #232a35;
  --line-2: #2e3745;
  --ink: #e7ecf3;
  --ink-2: #aeb8c6;
  --ink-3: #6f7c8e;
  --accent: #ffb020;
  --accent-2: #ff8a3d;
  --accent-ink: #1a1206;
  --good: #46d39a;
  --info: #59a6ff;
  --grid: rgba(255, 255, 255, 0.025);
  --shadow: 0 18px 50px -20px rgba(0, 0, 0, 0.7);

  --f-display: "Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
  --f-body: "Public Sans", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --wrap: 1140px;
  --radius: 14px;
}

:root[data-theme="light"] {
  --bg: #f5f2ea;
  --bg-2: #efeadf;
  --panel: #fffdf8;
  --panel-2: #f8f4ec;
  --line: #e0d8c8;
  --line-2: #cfc5b1;
  --ink: #1c1e22;
  --ink-2: #4a4f57;
  --ink-3: #837c6e;
  --accent: #c9600a;
  --accent-2: #b8480a;
  --accent-ink: #fff8ee;
  --grid: rgba(0, 0, 0, 0.03);
  --shadow: 0 18px 50px -24px rgba(60, 45, 20, 0.35);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f5f2ea;
    --bg-2: #efeadf;
    --panel: #fffdf8;
    --panel-2: #f8f4ec;
    --line: #e0d8c8;
    --line-2: #cfc5b1;
    --ink: #1c1e22;
    --ink-2: #4a4f57;
    --ink-3: #837c6e;
    --accent: #c9600a;
    --accent-2: #b8480a;
    --accent-ink: #fff8ee;
    --grid: rgba(0, 0, 0, 0.03);
    --shadow: 0 18px 50px -24px rgba(60, 45, 20, 0.35);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 46px 46px;
}

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- mono label: the datasheet voice ---- */
.tag {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.tag-accent { color: var(--accent); }

/* ---- nav ---- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: color-mix(in oklab, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav-in { display: flex; align-items: center; gap: 20px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--f-display); font-weight: 700; font-size: 19px; letter-spacing: -0.01em; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand .dot { width: 11px; height: 11px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, var(--accent), var(--accent-2)); box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 22%, transparent), 0 0 16px color-mix(in oklab, var(--accent) 55%, transparent); }
.nav-links { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--ink-2); font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.nav-links a.cta { color: var(--accent-ink); background: var(--accent); padding: 7px 14px; border-radius: 8px; font-family: var(--f-mono); font-size: 12.5px; letter-spacing: 0.02em; }
.nav-links a.cta:hover { background: var(--accent-2); }
.theme-btn { background: transparent; border: 1px solid var(--line-2); color: var(--ink-2); width: 34px; height: 34px; border-radius: 8px; cursor: pointer; display: grid; place-items: center; font-size: 15px; }
.theme-btn:hover { color: var(--ink); border-color: var(--accent); }

/* ---- hero ---- */
.hero { position: relative; padding: 92px 0 64px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(680px 340px at 78% 12%, color-mix(in oklab, var(--accent) 16%, transparent), transparent 70%);
  pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 40px; align-items: center; position: relative; }
.hero h1 {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(38px, 6vw, 66px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin: 16px 0 0;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lede { color: var(--ink-2); font-size: clamp(16px, 2vw, 19px); max-width: 30em; margin: 20px 0 0; }
.hero-cta { display: flex; gap: 12px; margin-top: 30px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--f-mono); font-size: 13px; letter-spacing: 0.02em;
  padding: 12px 18px; border-radius: 10px; cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn-primary:hover { background: var(--accent-2); text-decoration: none; }
.btn-ghost { background: transparent; border-color: var(--line-2); color: var(--ink); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* code chip in hero */
.oneliner {
  margin-top: 26px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 10px; padding: 14px 16px; font-family: var(--f-mono); font-size: 13px;
  color: var(--ink-2); overflow-x: auto; box-shadow: var(--shadow);
}
.oneliner .p { color: var(--accent); user-select: none; }
.oneliner .c { color: var(--ink-3); }

/* orbital diagram */
.orbit { position: relative; aspect-ratio: 1; max-width: 380px; margin: 0 auto; width: 100%; }
.orbit svg { width: 100%; height: 100%; overflow: visible; }
.orbit .ring { fill: none; stroke: var(--line-2); stroke-width: 1; }
.orbit .core { fill: var(--accent); }
.orbit .node { fill: var(--panel); stroke: var(--line-2); stroke-width: 1.5; }
.orbit .spin { transform-origin: 50% 50%; animation: spin 34s linear infinite; }
.orbit .spin.rev { animation-duration: 52s; animation-direction: reverse; }
.orbit-label { font-family: var(--f-mono); font-size: 9px; fill: var(--ink-3); letter-spacing: 0.1em; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .orbit .spin { animation: none; } }

/* ---- section scaffolding (datasheet) ---- */
section { padding: 68px 0; border-top: 1px solid var(--line); }
.sec-head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 34px; }
.sec-num { font-family: var(--f-mono); font-size: 13px; color: var(--accent); }
.sec-head h2 { font-family: var(--f-display); font-weight: 700; font-size: clamp(26px, 3.6vw, 38px); letter-spacing: -0.02em; margin: 0; }
.sec-head p { color: var(--ink-2); margin: 6px 0 0; max-width: 40em; }

/* feature rows */
.feat { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: center; padding: 34px 0; border-top: 1px dashed var(--line); }
.feat:first-of-type { border-top: none; }
.feat.flip .feat-media { order: -1; }
.feat h3 { font-family: var(--f-display); font-weight: 600; font-size: 22px; letter-spacing: -0.01em; margin: 10px 0 8px; }
.feat p { color: var(--ink-2); margin: 0; }
.feat ul { color: var(--ink-2); margin: 12px 0 0; padding-left: 18px; }
.feat li { margin: 4px 0; }
.feat li::marker { color: var(--accent); }

/* framed screenshot */
.frame { border: 1px solid var(--line-2); border-radius: var(--radius); background: var(--panel); box-shadow: var(--shadow); overflow: hidden; }
.frame-bar { display: flex; align-items: center; gap: 6px; padding: 9px 12px; border-bottom: 1px solid var(--line); background: var(--panel-2); }
.frame-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); display: block; }
.frame-bar .u { margin-left: 10px; font-family: var(--f-mono); font-size: 11px; color: var(--ink-3); }
.frame img { display: block; width: 100%; height: auto; }

/* grid of small cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 20px; transition: border-color .16s, transform .16s; }
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card .k { font-family: var(--f-mono); font-size: 11px; color: var(--accent); letter-spacing: 0.14em; text-transform: uppercase; }
.card h4 { font-family: var(--f-display); font-weight: 600; font-size: 17px; margin: 10px 0 6px; }
.card p { color: var(--ink-2); font-size: 14px; margin: 0; }

/* code block */
pre.code { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; overflow-x: auto; font-family: var(--f-mono); font-size: 13px; line-height: 1.7; color: var(--ink-2); box-shadow: var(--shadow); }
pre.code .cm { color: var(--ink-3); }
pre.code .ky { color: var(--accent); }
pre.code .st { color: var(--good); }
code.inline { font-family: var(--f-mono); font-size: 0.88em; background: var(--panel-2); border: 1px solid var(--line); border-radius: 5px; padding: 1px 6px; color: var(--ink); }

/* install steps */
.steps { display: grid; gap: 14px; counter-reset: s; }
.step { display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: start; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.step::before { counter-increment: s; content: counter(s, decimal-leading-zero); font-family: var(--f-mono); color: var(--accent); font-size: 14px; padding-top: 2px; }
.step h4 { margin: 0 0 6px; font-family: var(--f-display); font-weight: 600; font-size: 17px; }
.step p { margin: 0; color: var(--ink-2); font-size: 14.5px; }

/* changelog */
.log { max-width: 760px; }
.log h2 { font-family: var(--f-display); font-size: 22px; letter-spacing: -0.01em; border-bottom: 1px solid var(--line); padding-bottom: 8px; margin: 34px 0 16px; }
.log h1 { display: none; }
.log ul { padding-left: 20px; }
.log li { margin: 10px 0; color: var(--ink-2); }
.log li::marker { color: var(--accent); }
.log strong { color: var(--ink); }
.log code { font-family: var(--f-mono); font-size: 0.86em; background: var(--panel-2); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; }
.log p { color: var(--ink-3); font-size: 14px; }

/* stat strip */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.stat { background: var(--panel); padding: 22px 20px; }
.stat .n { font-family: var(--f-display); font-weight: 700; font-size: 30px; letter-spacing: -0.02em; color: var(--ink); }
.stat .l { font-family: var(--f-mono); font-size: 11px; color: var(--ink-3); letter-spacing: 0.12em; text-transform: uppercase; margin-top: 4px; }

/* footer */
footer { border-top: 1px solid var(--line); padding: 44px 0 60px; color: var(--ink-3); }
.foot-in { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; align-items: center; }
.foot-in .foot-links { display: flex; gap: 20px; }
.foot-in a { color: var(--ink-2); font-size: 14px; }
.foot-note { font-family: var(--f-mono); font-size: 12px; }

/* reveal on load */
.reveal { opacity: 0; transform: translateY(14px); animation: rise .7s cubic-bezier(.2,.7,.2,1) forwards; }
@keyframes rise { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .reveal { animation: none; opacity: 1; transform: none; } }

/* responsive */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .orbit { max-width: 300px; order: -1; }
  .feat, .hero-grid { grid-template-columns: 1fr; }
  .feat.flip .feat-media { order: 0; }
  .cards { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .nav-links a:not(.cta):not(.theme-link) { display: none; }
}