/* Darren Spurgeon — personal site
   Plain CSS. Light/dark follows the visitor's system setting. */

:root {
  --sans: "Google Sans Flex", "Google Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "Google Sans Code", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --bg: #EEF0F2;
  --ink: #0D0F12;
  --muted: #5A616A;
  --rule: #CCD1D7;
  --accent: #0B5E7A;

  --gutter: 20px;
  --max: 1180px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B0D10;
    --ink: #F0F2F4;
    --muted: #8C939C;
    --rule: #22272D;
    --accent: #6CC4E0;
  }
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p, ul { margin: 0; }
ul { padding: 0; list-style: none; }
h1, h2, h3 { text-wrap: balance; }
a { color: var(--accent); text-underline-offset: 4px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.wrap { max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter); }

/* ---------- top bar ---------- */
.top {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
  padding-block: 22px; border-bottom: 1px solid var(--rule); font-size: 14px;
}
.top b { font-weight: 650; }
.top span { color: var(--muted); }
.meta { font: 13px/1.4 var(--mono); color: var(--muted); }

/* ---------- hero ---------- */
.hero { display: grid; gap: 26px; padding-block: 48px 44px; }
.hero h1 {
  font-size: clamp(40px, 8vw, 104px); line-height: .98; font-weight: 620;
  letter-spacing: -.035em; max-width: 15ch;
}
.hero h1 span { color: var(--accent); }
.hero > p { font-size: 18px; color: var(--muted); max-width: 58ch; }
.cta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 22px; font-size: 15px; }
.button {
  display: inline-block; background: var(--ink); color: var(--bg); text-decoration: none;
  border-radius: 4px; padding: 10px 16px; font-weight: 600; font-size: 14px;
}
.button:hover { opacity: .88; }

/* ---------- focus strip ---------- */
.focus { display: grid; gap: 6px; padding-block: 18px; border-block: 1px solid var(--rule); font-size: 15px; }
.focus li { position: relative; padding-left: 16px; }
.focus li::before { content: ""; position: absolute; left: 0; top: .72em; width: 8px; height: 1px; background: var(--accent); }

/* ---------- sections ---------- */
main > section { padding-top: 52px; }
h2 {
  font: 600 12px/1.3 var(--mono); letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 6px;
}
.row { display: grid; gap: 10px 40px; padding-block: 24px; border-top: 1px solid var(--rule); }
h2 + .row { border-top-color: var(--ink); }
.row > h3 { font-size: clamp(22px, 2.6vw, 28px); font-weight: 620; letter-spacing: -.015em; line-height: 1.15; }
.row p { max-width: 64ch; }
.row > div > p:first-child { color: var(--muted); }
.tags { font: 12.5px/1.4 var(--mono); color: var(--accent); margin-top: 8px; }

.who { display: grid; gap: 3px; align-content: start; }
.who h3 { font-size: clamp(20px, 2.3vw, 24px); font-weight: 650; letter-spacing: -.01em; line-height: 1.2; }
.who p { font-size: 15px; color: var(--muted); }
.who .dates { font: 12.5px/1.3 var(--mono); margin-top: 6px; font-variant-numeric: tabular-nums; }

.what { display: grid; gap: 10px; }
.what .blurb { font-size: 15.5px; color: var(--muted); }
.what li { position: relative; padding-left: 16px; padding-block: 3px; font-size: 15.5px; line-height: 1.5; max-width: 66ch; }
.what li::before { content: ""; position: absolute; left: 0; top: .78em; width: 8px; height: 1px; background: var(--accent); }

.base { display: grid; gap: 24px; padding-top: 24px; border-top: 1px solid var(--ink); }
.base h3 { font-size: 13px; font-weight: 500; color: var(--muted); margin-bottom: 6px; }
.base li { font-size: 15.5px; padding-block: 2px; }

/* ---------- footer ---------- */
.foot {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px;
  margin-top: 56px; padding-block: 20px 40px; border-top: 1px solid var(--rule);
  font: 13px/1.4 var(--mono); color: var(--muted);
}

/* ---------- desktop ---------- */
@media (min-width: 760px) {
  :root { --gutter: 48px; }
  .hero { padding-block: 88px 64px; }
  main > section { padding-top: 64px; }
  .row { grid-template-columns: 4fr 8fr; padding-block: 28px; }
  .base { grid-template-columns: repeat(3, 1fr); }
  .focus { display: flex; flex-wrap: wrap; gap: 8px 0; }
  .focus li { padding: 0 14px 0 0; margin-right: 14px; border-right: 1px solid var(--rule); }
  .focus li::before { display: none; }
  .focus li:last-child { border-right: 0; }
}

/* ---------- print ---------- */
@media print {
  :root { --bg: #fff; --ink: #000; --muted: #444; --rule: #bbb; --accent: #000; --gutter: 0; }
  body { font-size: 11pt; }
  .hero { padding-block: 16pt; }
  .hero h1 { font-size: 30pt; }
  .cta, .foot { display: none; }
  main > section { padding-top: 14pt; }
  .row { grid-template-columns: 4fr 8fr; break-inside: avoid; padding-block: 10pt; }
  .base { grid-template-columns: repeat(3, 1fr); }
}

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