/* melltron.build — single stylesheet, token-driven.
   Status colors carry meaning site-wide; never use them decoratively. */
:root {
  --bg: #0d0f10;
  --surface: #15181a;
  --line: #262b2e;
  --text: #e6e8e9;
  --muted: #8b9396;
  --accent: #ff5a1f;          /* signal / primary */
  --live: #3ddc84;            /* status: live */
  --building: #f5b82e;        /* status: building */
  --planned: #6aa8ff;         /* status: planned */
  --retired: #6b7275;         /* status: retired */
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --w: 46rem;
  --r: 6px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f6f4; --surface: #ffffff; --line: #dcdedb; --text: #151718; --muted: #5d6467;
    --accent: #d9420b; --live: #108a4a; --building: #a86e00; --planned: #1f63c8; --retired: #7b8285;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.65 var(--sans);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  background-attachment: fixed;
  background-position: -1px -1px;
}
body::before { /* fade the grid so text stays readable */
  content: ""; position: fixed; inset: 0; z-index: -1;
  background: radial-gradient(ellipse at 50% 0%, transparent 0%, var(--bg) 70%);
}
a { color: inherit; text-decoration-color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.wrap { max-width: var(--w); margin: 0 auto; padding: 0 16px; }

/* header */
.top { border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(6px); position: sticky; top: 0; z-index: 2; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 56px; gap: 16px; }
.mark { font: 600 15px/1 var(--mono); text-decoration: none; letter-spacing: .02em; display: flex; align-items: center; gap: 10px; }
.mark svg { width: 20px; height: 20px; }
.mark .wm b { color: var(--accent); font-weight: inherit; }
.mark .mark-m { stroke: var(--accent); }
nav { display: flex; gap: 20px; font: 13px/1 var(--mono); text-transform: lowercase; }
nav a { text-decoration: none; color: var(--muted); }
nav a[aria-current="page"], nav a:hover { color: var(--text); }

/* hero */
.hero { padding: 72px 0 40px; }
.eyebrow { font: 12px/1 var(--mono); color: var(--accent); letter-spacing: .12em; text-transform: uppercase; margin: 0 0 16px; }
h1 { font-size: clamp(2rem, 6vw, 3.1rem); line-height: 1.08; letter-spacing: -.02em; margin: 0 0 18px; font-weight: 650; }
.lede { color: var(--muted); font-size: 1.1rem; max-width: 36rem; margin: 0; }

/* sections */
section { padding: 32px 0; }
.sec-head { display: flex; align-items: baseline; justify-content: space-between; border-bottom: 1px solid var(--line); padding-bottom: 10px; margin-bottom: 8px; }
h2 { font: 600 13px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; margin: 0; }
.sec-head a { font: 12px/1 var(--mono); color: var(--muted); text-decoration: none; }

/* index rows (log + lab share one pattern) */
.rows { list-style: none; margin: 0; padding: 0; }
.row { display: grid; grid-template-columns: 6.5rem 1fr auto; gap: 16px; align-items: baseline; padding: 14px 0; border-bottom: 1px dashed var(--line); }
.row .id { font: 12px/1.4 var(--mono); color: var(--muted); }
.row .t { font-weight: 600; text-decoration: none; }
.row .s { display: block; color: var(--muted); font-size: .93rem; margin-top: 2px; }
.row .meta { font: 12px/1.4 var(--mono); color: var(--muted); white-space: nowrap; }
@media (max-width: 560px) {
  .row { grid-template-columns: 1fr auto; }
  .row .id { grid-column: 1 / -1; }
}
.empty { color: var(--muted); font: 13px/1.6 var(--mono); padding: 18px 0; }

/* status pill */
.st { font: 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; padding: 4px 7px; border-radius: 3px; border: 1px solid currentColor; }
.st-live { color: var(--live); } .st-building { color: var(--building); }
.st-planned { color: var(--planned); } .st-retired { color: var(--retired); }

/* article */
article { padding: 56px 0 24px; }
article header { border-bottom: 1px solid var(--line); padding-bottom: 20px; margin-bottom: 28px; }
article h1 { font-size: clamp(1.7rem, 5vw, 2.4rem); }
.byline { font: 12px/1.6 var(--mono); color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px 16px; }
.tag { color: var(--accent); }
.prose h2 { font: 650 1.25rem/1.3 var(--sans); text-transform: none; letter-spacing: -.01em; margin: 2.2rem 0 .6rem; }
.prose h3 { font-size: 1.05rem; margin: 1.8rem 0 .4rem; }
.prose p, .prose ul, .prose ol { margin: 0 0 1.1rem; }
.prose li { margin: .25rem 0; }
.prose code { font: .88em var(--mono); background: var(--surface); border: 1px solid var(--line); padding: 1px 5px; border-radius: 4px; }
.prose pre { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px; overflow-x: auto; font: 13px/1.55 var(--mono); }
.prose pre code { background: none; border: 0; padding: 0; }
.prose blockquote { margin: 0 0 1.1rem; padding: 2px 0 2px 16px; border-left: 2px solid var(--accent); color: var(--muted); }
.prose img { max-width: 100%; height: auto; border-radius: var(--r); border: 1px solid var(--line); }
.prose table { border-collapse: collapse; width: 100%; font-size: .93rem; margin-bottom: 1.1rem; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }

/* footer */
footer { border-top: 1px solid var(--line); margin-top: 48px; padding: 24px 0 40px; font: 12px/1.6 var(--mono); color: var(--muted); }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
footer a { text-decoration: none; }

@media (prefers-reduced-motion: no-preference) {
  a { transition: color .12s; }
}