/* ==========================================================================
   austin-coffman.github.io — design system
   Shared by the home page (track scene) and every detail page. Tokens first,
   then base, chrome (nav/footer), components. Page-specific rules live in
   each page's own stylesheet. See design.html for the rationale and examples.
   ========================================================================== */

/* ---------- tokens ---------- */
:root {
  /* surfaces */
  --bg: #07080b;
  --bg-2: #0c0e13;
  --panel: #101318;
  --line: rgba(255, 255, 255, 0.1);
  --line-strong: rgba(255, 255, 255, 0.18);

  /* ink */
  --ink: #f4f1ea;
  --soft: #d9d5cb;
  --muted: #9b978e;
  --dim: #6b6a66;

  /* accent + telemetry */
  --accent: #ffb627;
  --accent-hover: #ffd070;
  --accent-ink: #07080b;
  --go: #3dd68c;
  --stop: #ff3b30;

  /* type */
  --display: 'Saira Extra Condensed', sans-serif;
  --body: 'Saira', sans-serif;
  --mono: 'JetBrains Mono', monospace;

  /* rhythm */
  --gutter: 48px;
  --col: 1040px;
  --col-narrow: 720px;
  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 24px; --s-6: 32px; --s-7: 48px; --s-8: 64px; --s-9: 96px;
}
@media (max-width: 768px) { :root { --gutter: 20px; } }

/* ---------- base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: auto; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--body); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; display: block; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

h1, h2, h3 { margin: 0; font-family: var(--display); text-transform: uppercase; font-weight: 700; line-height: 0.95; letter-spacing: -0.01em; }
h1 { font-size: clamp(56px, 8vw, 112px); font-weight: 800; line-height: 0.88; }
h2 { font-size: clamp(40px, 5vw, 64px); }
h3 { font-size: clamp(26px, 2.6vw, 34px); line-height: 1; }
p { margin: 0; }
p + p { margin-top: var(--s-4); }

/* labels: the telemetry voice — mono, tracked, small */
.eyebrow { font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent); }
.label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
.lede { font-size: clamp(19px, 1.6vw, 22px); line-height: 1.45; color: var(--ink); }
.prose { color: var(--soft); max-width: var(--col-narrow); }
.prose p + p { margin-top: var(--s-4); }
.prose strong { color: var(--ink); font-weight: 600; }
.prose ul { margin: var(--s-4) 0 0; padding-left: 1.2em; }
.prose li + li { margin-top: var(--s-2); }
code, .code { font-family: var(--mono); font-size: 0.92em; color: var(--ink); background: var(--panel); border: 1px solid var(--line); padding: 1px 6px; border-radius: 3px; }
pre.code { padding: var(--s-4) var(--s-5); overflow: auto; line-height: 1.55; font-size: 13px; }

/* ---------- layout ---------- */
.wrap { max-width: var(--col); margin: 0 auto; padding: 0 var(--gutter); }
.wrap-narrow { max-width: var(--col-narrow); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: var(--s-8) 0; }
.section + .section { border-top: 1px solid var(--line); }
.section-head { display: flex; flex-direction: column; gap: var(--s-3); margin-bottom: var(--s-6); }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--s-5); }
.split { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: var(--s-8); align-items: start; }
@media (max-width: 900px) { .grid-2, .grid-3, .split { grid-template-columns: 1fr; } }

/* ---------- chrome: nav + footer ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 10;
  display: flex; justify-content: space-between; align-items: center;
  padding: 24px var(--gutter) 40px; text-transform: uppercase; letter-spacing: 0.06em; font-size: 13px; font-weight: 600;
  background: linear-gradient(180deg, rgba(7,8,11,0.96) 0%, rgba(7,8,11,0.82) 55%, rgba(7,8,11,0) 100%);
  backdrop-filter: blur(10px);
  -webkit-mask-image: linear-gradient(180deg, #000 55%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 55%, transparent 100%);
}
.nav .brand { font-family: var(--display); font-size: 22px; font-weight: 700; letter-spacing: 0.04em; color: var(--ink); }
.nav nav { display: flex; gap: 26px; }
.nav nav a { color: var(--ink); }
.nav nav a.muted { color: #c9c4b8; }
.nav nav a.current { color: var(--accent); }
@media (max-width: 768px) { .nav nav { gap: 16px; font-size: 12px; } }

.footer { padding: var(--s-7) 0 var(--s-6); border-top: 1px solid var(--line); }
.footer .checker { width: 100%; max-width: 420px; height: 16px; margin-bottom: var(--s-5); background-color: var(--ink);
  background-image: linear-gradient(45deg, var(--bg) 25%, transparent 25%, transparent 75%, var(--bg) 75%), linear-gradient(45deg, var(--bg) 25%, transparent 25%, transparent 75%, var(--bg) 75%);
  background-size: 16px 16px; background-position: 0 0, 8px 8px; }
.footer-row { display: flex; justify-content: space-between; align-items: flex-end; gap: var(--s-6); flex-wrap: wrap; }
.footer .links { display: flex; gap: var(--s-5); font-size: 13px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.footer .links a { color: #c9c4b8; }
.footer .fine { font-family: var(--mono); font-size: 11px; color: var(--dim); margin-top: var(--s-6); line-height: 1.7; }
.footer .fine a { color: var(--muted); }

/* ---------- components ---------- */
/* buttons */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 12px 18px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; border: 1px solid var(--line-strong); color: var(--ink); background: transparent; cursor: pointer; transition: border-color 0.15s, color 0.15s, background 0.15s; }
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 500; }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--accent-ink); }
.cta { font-size: 14px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; }

/* tags */
.tags { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.tag { font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--soft); border: 1px solid var(--line); padding: 4px 9px; }

/* key/value facts */
.facts { margin: 0; display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.facts div { display: grid; grid-template-columns: 140px 1fr; gap: var(--s-4); padding: 14px 0; border-bottom: 1px solid var(--line); }
.facts dt { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; color: var(--muted); text-transform: uppercase; padding-top: 3px; }
.facts dd { margin: 0; font-size: 15px; color: var(--ink); }
.facts dd a { color: var(--accent); }
@media (max-width: 768px) { .facts div { grid-template-columns: 110px 1fr; } }

/* card (project, technology, skill) */
.card { display: flex; flex-direction: column; gap: var(--s-2); padding: var(--s-4) var(--s-5); background: var(--panel); border: 1px solid var(--line); color: var(--ink); transition: border-color 0.15s; }
a.card:hover { border-color: var(--line-strong); color: var(--ink); }
a.card:hover .cta { color: var(--accent-hover); }
.card .num { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; color: var(--muted); }
.card h3 { font-size: 28px; }
.card p { font-size: 14px; line-height: 1.55; color: var(--soft); }
.card .cta { margin-top: auto; padding-top: var(--s-3); color: var(--accent); }
.card img, .card .ph { aspect-ratio: 16 / 10; object-fit: cover; width: 100%; margin: calc(var(--s-4) * -1) calc(var(--s-5) * -1) var(--s-2); width: calc(100% + var(--s-5) * 2); max-width: none; }
.card .ph { background: #14171f; display: flex; align-items: center; justify-content: center; font-family: var(--mono); font-size: 11px; color: var(--muted); }

/* post rows (playground feed) */
.posts { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.posts a { display: grid; grid-template-columns: 110px 1fr auto; gap: var(--s-5); align-items: center; padding: 20px 0; border-bottom: 1px solid var(--line); color: var(--ink); }
.posts small { font-family: var(--mono); font-size: 11px; color: var(--muted); }
.posts span { display: flex; flex-direction: column; gap: 4px; }
.posts strong { font-family: var(--display); font-size: 30px; font-weight: 700; line-height: 1; text-transform: uppercase; }
.posts em { font-style: normal; font-size: 14px; color: var(--muted); }
.posts b { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; color: var(--accent-ink); background: var(--accent); padding: 7px 12px; font-weight: 500; }
.posts b.ghost { color: var(--ink); background: none; border: 1px solid #6c7288; padding: 6px 12px; }
.posts a:hover strong { color: var(--accent); }
@media (max-width: 768px) { .posts a { grid-template-columns: 1fr auto; } .posts small { grid-column: 1 / -1; } }

/* timeline (experience): a vertical rail with a year gutter. Employers are the big nodes; each
   role (promotion) is a small node under its employer with its own dates. Bullets stay compact. */
.tl { list-style: none; margin: 0; padding: var(--s-2) 0 0 88px; position: relative; }
.tl::before { content: ''; position: absolute; left: 63px; top: 0; bottom: 0; width: 2px; background: var(--line-strong); }
.tl-org { position: relative; padding-bottom: var(--s-6); }
.tl-org:last-child { padding-bottom: 0; }
.tl-org::before { content: ''; position: absolute; left: -33px; top: 4px; width: 10px; height: 10px; background: var(--bg); border: 3px solid var(--accent); }
.tl-org > header { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px var(--s-3); margin-bottom: var(--s-3); }
.tl-org > header b { font-family: var(--display); font-size: 28px; font-weight: 700; line-height: 1; text-transform: uppercase; color: var(--ink); }
.tl-org > header .meta { font-size: 13px; color: var(--muted); }
.tl-org > header .span { margin-left: auto; font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; color: var(--accent); text-transform: uppercase; }
.tl-org > ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--s-4); }
.tl-role { position: relative; }
.tl-role::before { content: ''; position: absolute; left: -29px; top: 7px; width: 8px; height: 8px; background: var(--line-strong); }
.tl-role.current::before { background: var(--accent); }
.tl-role::after { content: attr(data-year); position: absolute; right: calc(100% + 34px); top: 1px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; color: var(--muted); }
.tl-role h3 { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px var(--s-3); font-size: 20px; margin-bottom: 4px; }
.tl-role h3 time { font-family: var(--mono); font-size: 11px; font-weight: 400; letter-spacing: 0.14em; color: var(--muted); text-transform: uppercase; }
.tl-role ul { margin: 0; padding-left: 1.05em; color: var(--soft); font-size: 13.5px; line-height: 1.45; }
.tl-role li { margin-top: 2px; }
@media (max-width: 768px) {
  .tl { padding-left: 32px; }
  .tl::before { left: 7px; }
  .tl-org::before { left: -33px; }
  .tl-role::before { left: -29px; }
  .tl-role::after { display: none; }
  .tl-org > header .span { margin-left: 0; width: 100%; }
}

/* stat strip (telemetry-style numbers) */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--s-4); }
.stat { padding: var(--s-4) var(--s-5); background: var(--panel); border: 1px solid var(--line); display: flex; flex-direction: column; gap: 4px; }
.stat b { font-family: var(--display); font-size: 44px; font-weight: 800; line-height: 0.9; color: var(--ink); font-variant-numeric: tabular-nums; }
.stat b i { font-style: normal; color: var(--accent); }
.stat span { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
@media (max-width: 768px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* figure */
figure { margin: 0; }
figure img { width: 100%; border: 1px solid var(--line); }
figcaption { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; color: var(--muted); margin-top: var(--s-3); }

/* pager (prev / next) */
.pager { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.pager a { display: flex; flex-direction: column; gap: 6px; padding: var(--s-5) 0; color: var(--ink); }
.pager a + a { text-align: right; align-items: flex-end; border-left: 1px solid var(--line); padding-left: var(--s-5); }
.pager a:first-child { padding-right: var(--s-5); }
.pager strong { font-family: var(--display); font-size: 26px; text-transform: uppercase; font-weight: 700; line-height: 1; }
.pager a:hover strong { color: var(--accent); }

/* ---------- detail-page shell: no scene, but the same darkness with a hint of asphalt grain ---------- */
.page-detail { position: relative; min-height: 100vh; }
.page-detail::before {
  content: ''; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(ellipse 60% 45% at 18% 0%, rgba(255, 182, 39, 0.07), transparent 70%),
    linear-gradient(180deg, var(--bg-2) 0%, var(--bg) 60%);
}
.page-detail::after {
  content: ''; position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: 0.35;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 70%);
  mask-image: linear-gradient(180deg, #000, transparent 70%);
}
.page-head { padding: 140px 0 var(--s-7); }
.page-head .eyebrow { display: block; margin-bottom: var(--s-4); }
.page-head .lede { margin-top: var(--s-4); max-width: var(--col-narrow); }
.page-head .meta { display: flex; flex-wrap: wrap; gap: var(--s-6); margin-top: var(--s-5); }
.page-head .meta div { display: flex; flex-direction: column; gap: 4px; }
.page-head .meta dt { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
.page-head .meta dd { margin: 0; font-size: 15px; color: var(--ink); }
@media (max-width: 768px) { .page-head { padding-top: 128px; } }

/* detail pages run denser than the home page: smaller display sizes, 48px sections, tighter lists */
.page-detail h1 { font-size: clamp(48px, 6.5vw, 88px); }
.page-detail h2 { font-size: clamp(34px, 4vw, 52px); }
.page-detail .page-head { padding: 116px 0 var(--s-6); }
.page-detail .page-head .lede { font-size: clamp(17px, 1.4vw, 20px); }
.page-detail .section { padding: var(--s-7) 0; }
.page-detail .section-head { margin-bottom: var(--s-5); gap: var(--s-2); }
.page-detail .split { gap: var(--s-7); }
.page-detail .card h3 { font-size: 24px; }
.page-detail .card p { font-size: 13.5px; }
.page-detail .grid-3 { gap: var(--s-4); }
.page-detail .footer { padding: var(--s-6) 0 var(--s-5); }
@media (max-width: 768px) { .page-detail .page-head { padding-top: 104px; } }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }