/* OrbitalCommons design system. Shared by every page; no build step, no external assets. */

:root {
  color-scheme: dark;
  --bg: #05070d;
  --bg-2: #0a0e19;
  --panel: rgba(17, 23, 38, .72);
  --panel-solid: #111726;
  --line: rgba(140, 170, 230, .14);
  --line-strong: rgba(140, 170, 230, .28);
  --ink: #e8ecf6;
  --ink-2: #b4bdd2;
  --ink-3: #7b86a3;
  --accent: #7cc4ff;
  --accent-2: #ffc477;
  --accent-3: #b69cff;
  --ok: #8be3b0;
  --glow: 0 0 0 1px rgba(124, 196, 255, .35), 0 10px 40px -10px rgba(124, 196, 255, .35);
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, "JetBrains Mono", Menlo, Consolas, monospace;
  --radius: 14px;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-height, 60px) + 20px); -webkit-text-size-adjust: 100%; }
/* Focus scrolling must settle before the user activates a nearby control. */
html:focus-within { scroll-behavior: auto; }
body {
  margin: 0; background: var(--bg); color: var(--ink-2);
  font: 1rem/1.65 var(--sans); overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
::selection { background: rgba(124, 196, 255, .3); color: #fff; }
img, svg, canvas { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.skip { position: absolute; left: -999px; top: 0; z-index: 100; background: var(--accent); color: #000;
  padding: .5rem 1rem; border-radius: 0 0 8px 0; }
.skip:focus { left: 0; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Layout */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }
.wrap.narrow { max-width: 820px; }
section { position: relative; }
.section { padding: 4.5rem 0; }

/* Navigation */
.site-nav {
  position: relative; top: 0; z-index: 50;
  backdrop-filter: blur(14px) saturate(140%); -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: linear-gradient(to bottom, rgba(5, 7, 13, .82), rgba(5, 7, 13, .55));
  border-bottom: 1px solid var(--line);
}
/* The header only sticks once assets/nav.js has measured it, so anchors are never hidden under it. */
.nav-ready .site-nav { position: sticky; }
.site-nav .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem 1.5rem; min-height: 60px; }
.brand { display: inline-flex; align-items: center; gap: .6rem; color: var(--ink); font-weight: 650;
  letter-spacing: -.01em; font-size: 1.02rem; min-width: 0; max-width: 100%; }
.brand span { overflow-wrap: anywhere; }
.brand:hover { text-decoration: none; }
.brand .mark { width: 18px; height: 32px; }
.brand b { font-weight: 650; color: var(--accent); }
.site-nav nav { margin-left: auto; display: flex; flex-wrap: wrap; gap: .2rem 1.4rem; font-size: .9rem; }
.site-nav nav a { color: var(--ink-2); }
.site-nav nav a { padding: .3rem 0; transition: color .2s, box-shadow .2s; }
.site-nav nav a:hover, .site-nav nav a[aria-current] { color: var(--ink); text-decoration: none; }
.site-nav nav a[aria-current] { box-shadow: inset 0 -1px var(--accent); }
@media (max-width: 640px) { .site-nav nav a.opt { display: none; } }

/* Type */
h1, h2, h3, h4 { color: var(--ink); line-height: 1.15; letter-spacing: -.02em; margin: 0 0 .6em; overflow-wrap: break-word; }
/* The floor is capped by the viewport so very large user text sizes still fit narrow screens. */
h1 { font-size: clamp(min(2.4rem, 11vw), 6vw, 4.6rem); font-weight: 700; letter-spacing: -.035em; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); font-weight: 680; line-height: 1.08; text-wrap: balance; }
h3 { font-size: 1.15rem; font-weight: 640; }
p { margin: 0 0 1em; }
.mono { font-family: var(--mono); }
h1.mono { font-weight: 600; letter-spacing: -.04em; color: var(--ink); }
.eyebrow { font: 600 .74rem/1 var(--mono); letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 1.1rem; display: inline-flex; align-items: center; gap: .6rem; }
.eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; opacity: .7; }
.lede, .tag { font-size: clamp(1.05rem, 1.6vw, 1.25rem); color: var(--ink-2); max-width: 62ch; text-wrap: pretty; }
.muted { color: var(--ink-3); }
.grad { background: linear-gradient(100deg, var(--accent) 0%, var(--accent-3) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  -webkit-box-decoration-break: clone; box-decoration-break: clone; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .78rem 1.25rem; border-radius: 999px;
  font-weight: 600; font-size: .95rem; border: 1px solid var(--line-strong); color: var(--ink);
  background: rgba(255, 255, 255, .03); transition: background .2s, border-color .2s, transform .2s, box-shadow .2s;
  max-width: 100%; overflow-wrap: anywhere; }
.btn:hover { text-decoration: none; border-color: var(--accent); background: rgba(124, 196, 255, .08); transform: translateY(-1px); }
.btn.primary { background: var(--ink); color: #05070d; border-color: var(--ink); }
.btn.primary:hover { background: #fff; box-shadow: 0 10px 40px -8px rgba(124, 196, 255, .6); }
.btn svg { width: 18px; height: 18px; }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; }

/* Panels and cards */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.grid { display: grid; gap: 1.1rem; grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr)); }
.card { position: relative; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.4rem 1.4rem 1.2rem; transition: border-color .25s, transform .25s, box-shadow .25s; overflow: hidden; }
.card::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .3s;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(124, 196, 255, .12), transparent 45%); }
.card:hover { border-color: var(--line-strong); transform: translateY(-2px); box-shadow: 0 20px 50px -25px rgba(0, 0, 0, .8); }
.card:hover::before { opacity: 1; }
.card h3 { font-family: var(--mono); font-size: 1.05rem; font-weight: 600; margin: 0 0 .5rem; color: var(--ink); }
.card h3 a { color: inherit; }
.card h3 a::after { content: ""; position: absolute; inset: 0; z-index: 1; }
.card p { font-size: .93rem; color: var(--ink-2); margin: 0 0 1rem; }
.card .links { position: relative; z-index: 2; }

.meta { display: flex; gap: .45rem; flex-wrap: wrap; margin-bottom: .9rem; }
.meta span, .chip { font: 500 .72rem/1 var(--mono); padding: .32rem .55rem; border-radius: 6px;
  background: rgba(124, 196, 255, .07); color: var(--ink-2); border: 1px solid var(--line); }
.meta .lang.rust, .chip.rust { color: #ffb38a; background: rgba(255, 140, 90, .08); border-color: rgba(255, 140, 90, .2); }
.meta .lang.python, .chip.python { color: #ffe08a; background: rgba(255, 210, 90, .07); border-color: rgba(255, 210, 90, .2); }
.links { font-size: .85rem; display: flex; flex-wrap: wrap; gap: .35rem 1rem; }
.links a { color: var(--ink-3); }
.links a:hover { color: var(--accent); }

/* Content: prose, code, tables */
.prose { max-width: 72ch; }
.prose h2 { font-size: 1.6rem; margin-top: 2.6em; }
.prose h3 { margin-top: 2em; }
ul, ol { padding-left: 1.2rem; }
li { margin-bottom: .45rem; }
li::marker { color: var(--accent); }
code { font-family: var(--mono); font-size: .9em; }
p code, li code, td code { background: rgba(124, 196, 255, .08); border: 1px solid var(--line); padding: .08rem .38rem;
  border-radius: 5px; color: var(--ink); }
pre { background: #070a12; border: 1px solid var(--line); border-radius: 12px; padding: 1.1rem 1.25rem;
  overflow-x: auto; font-size: .87rem; line-height: 1.6; color: var(--ink); }
pre .c { color: var(--ink-3); } pre .k { color: var(--accent-3); } pre .s { color: var(--ok); }
pre .n { color: var(--accent-2); } pre .f { color: var(--accent); }
table { border-collapse: collapse; width: 100%; font-size: .92rem; margin: .5rem 0 1.5rem; }
th, td { text-align: left; padding: .6rem .75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--ink-3); font: 600 .72rem/1.2 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
blockquote { margin: 1.5rem 0; padding: .2rem 0 .2rem 1.2rem; border-left: 2px solid var(--accent); color: var(--ink); }
hr { border: 0; border-top: 1px solid var(--line); margin: 3rem 0; }

/* Project page header (subpages) */
.crumb { font: .82rem var(--mono); color: var(--ink-3); margin: 2.5rem 0 1.5rem; }
.crumb a { color: var(--ink-3); }
.crumb a:hover { color: var(--accent); }
.page-head { padding: 1rem 0 2.5rem; border-bottom: 1px solid var(--line); margin-bottom: 2.5rem; }

/* Footer */
.site-foot { border-top: 1px solid var(--line); margin-top: 4rem; padding: 3rem 0 4rem; color: var(--ink-3); font-size: .88rem; }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 1.5rem 3rem; align-items: flex-start; justify-content: space-between; }
.site-foot a { color: var(--ink-2); }
.site-foot .cols { display: flex; flex-wrap: wrap; gap: 1rem 3rem; }
.site-foot .cols div { display: flex; flex-direction: column; gap: .35rem; }
.site-foot h4, .site-foot .foot-h { font: 600 .7rem/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 .5rem; }

/* Reveal on scroll (enabled by JS adding .js to <html>) */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .8s ease, transform .8s cubic-bezier(.2, .7, .2, 1); }
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}
@media (max-width: 380px) {
  .site-nav .wrap { gap: .8rem; }
  .brand { font-size: .92rem; gap: .45rem; }
  .site-nav nav { gap: .9rem; font-size: .85rem; }
}