/* SPDX-License-Identifier: BSD-3-Clause */
/* Copyright (c) 2026 Bryan C. Everly */
:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1d1c1a;
  --muted: #5d5a54;
  --border: #e4e0d8;
  --accent: #2f5d50;
  --accent-soft: #e6efeb;
  --code-bg: #f3f1ec;
  --term-bg: #1e2421;
  --term-text: #e8ece9;
  --term-dim: #8fa39a;
  --term-accent: #9fd3bd;
  --radius: 10px;
  --maxw: 72rem;
  --serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121514;
    --surface: #191d1b;
    --text: #e9ece9;
    --muted: #a2aaa5;
    --border: #2b312e;
    --accent: #8fcfb6;
    --accent-soft: #1f2b26;
    --code-bg: #1f2422;
    --term-bg: #0c0f0e;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 var(--sans);
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1rem; }

/* header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(6px);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 3.75rem; }
.brand { display: flex; align-items: center; gap: .55rem; font-weight: 700; color: var(--text); text-decoration: none; letter-spacing: -.01em; }
.brand img { width: 26px; height: 26px; display: block; }
.nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }

/* hero */
.hero { padding: 4.5rem 0 3.5rem; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 3rem; align-items: center; }
.eyebrow { font: 600 .8rem/1 var(--sans); letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin: 0 0 1rem; }
h1, h2, h3 { font-family: var(--serif); line-height: 1.15; letter-spacing: -.015em; font-weight: 600; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); margin: 0 0 1.1rem; }
.lede { font-size: 1.2rem; color: var(--muted); margin: 0 0 1.75rem; max-width: 34rem; }
.cta { display: flex; gap: .75rem; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: .7rem 1.15rem; border-radius: 8px; font-weight: 600; font-size: .95rem;
  text-decoration: none; border: 1px solid var(--accent);
}
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-secondary { color: var(--accent); }

/* terminal */
.terminal { background: var(--term-bg); color: var(--term-text); border-radius: var(--radius); overflow: hidden; box-shadow: 0 18px 50px -24px rgba(0,0,0,.45); }
.terminal-bar { display: flex; gap: 6px; padding: .7rem .9rem; border-bottom: 1px solid rgba(255,255,255,.07); }
.terminal-bar span { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,.18); }
.terminal pre { margin: 0; padding: 1.1rem 1.2rem 1.3rem; font: 14px/1.7 var(--mono); white-space: pre-wrap; word-break: break-word; }
.terminal .prompt { color: var(--term-accent); user-select: none; }
.terminal .dim { color: var(--term-dim); }

/* sections */
section { padding: 3.5rem 0; }
section + section { border-top: 1px solid var(--border); }
.section-head { max-width: 44rem; margin-bottom: 2.25rem; }
.section-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.3rem); margin: 0 0 .75rem; }
.section-head p { color: var(--muted); margin: 0; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.35rem 1.4rem; }
.card h3 { font-size: 1.2rem; margin: 0 0 .5rem; }
.card p { margin: 0; color: var(--muted); font-size: .97rem; }

/* pipeline */
.pipeline { display: grid; gap: 1rem; }
.lane { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.2rem 1.3rem; }
.lane-title { font: 600 .78rem/1 var(--sans); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin: 0 0 .85rem; }
.steps { display: flex; flex-wrap: wrap; align-items: center; gap: .45rem; list-style: none; margin: 0; padding: 0; }
.steps li { background: var(--accent-soft); border-radius: 999px; padding: .3rem .8rem; font-size: .9rem; }
.steps li + li::before { content: "\2192"; color: var(--muted); margin: 0 .55rem 0 -.1rem; }

/* code */
code { font: .88em var(--mono); background: var(--code-bg); padding: .12em .35em; border-radius: 5px; }
pre.code { background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.1rem; overflow-x: auto; font: 14px/1.6 var(--mono); margin: 0 0 1.25rem; }
pre.code code { background: none; padding: 0; font-size: inherit; }
.code-block { position: relative; }
.copy-btn {
  position: absolute; top: .55rem; right: .55rem; font: 600 .75rem var(--sans);
  background: var(--surface); color: var(--muted); border: 1px solid var(--border); border-radius: 6px; padding: .25rem .55rem; cursor: pointer;
}
.copy-btn:hover { color: var(--text); }

/* tables */
.table-scroll { overflow-x: auto; margin: 0 0 1.5rem; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { text-align: left; padding: .6rem .75rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-weight: 600; color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .05em; }
td code { white-space: nowrap; }

/* roadmap */
.milestones { list-style: none; margin: 0; padding: 0; display: grid; gap: .75rem; }
.milestones li { display: grid; grid-template-columns: 4.5rem 1fr; gap: 1rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.2rem; }
.milestones .tag { font: 700 .95rem var(--mono); color: var(--accent); }
.milestones strong { display: block; }
.milestones span { color: var(--muted); font-size: .95rem; }
.milestones .now { border-color: var(--accent); }

/* docs layout */
.docs { display: grid; grid-template-columns: 14rem 1fr; gap: 3rem; padding: 2.5rem 0 4rem; }
.toc { position: sticky; top: 5rem; align-self: start; font-size: .92rem; }
.toc ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .35rem; }
.toc a { color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--text); }
.prose { min-width: 0; max-width: 46rem; }
.prose h1 { font-size: 2.4rem; margin: 0 0 1rem; }
.prose h2 { font-size: 1.6rem; margin: 2.75rem 0 .75rem; padding-top: .5rem; }
.prose h3 { font-size: 1.2rem; margin: 1.75rem 0 .5rem; }
.callout { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: .85rem 1.1rem; border-radius: 0 8px 8px 0; margin: 0 0 1.5rem; }
.callout p { margin: 0; }

/* footer */
.site-footer { border-top: 1px solid var(--border); padding: 2rem 0 2.5rem; color: var(--muted); font-size: .9rem; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }

@media (max-width: 900px) {
  .hero-grid, .grid-3, .grid-2, .docs { grid-template-columns: 1fr; }
  .hero { padding: 3rem 0 2.5rem; }
  .toc { position: static; border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .nav { gap: .9rem; }
  .milestones li { grid-template-columns: 1fr; gap: .25rem; }
  .terminal pre { font-size: 12.5px; }
}
@media (prefers-reduced-motion: no-preference) {
  .btn, .copy-btn { transition: background-color .15s, color .15s; }
}