/* Shared by every page: colors, page background, top bar and footer. */

:root {
  --bg: #0a0a0b;
  --panel: #121214;
  --inset: #0c0c0e;
  --line: #26262b;
  --line-strong: #34343b;
  --text: #f4f4f5;
  --muted: #a1a1aa;
  --faint: #71717a;
  --accent: #f7931a;
  --accent-ink: #0b0b0c;
  --error: #ff7b72;
  --ok: #4ade80;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(900px 420px at 50% -180px, rgba(247, 147, 26, .13), transparent 70%),
    var(--bg);
  background-repeat: no-repeat;
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main { flex: 1; width: 100%; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 10, 11, .8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.site-header .bar,
.site-footer .bar {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header .bar { height: 60px; }

.mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  letter-spacing: .01em;
  text-decoration: none;
}

.mark span {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 19px;
}

.site-header nav { display: flex; gap: 2px; margin-left: 12px; }

.site-header nav a {
  padding: 6px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.site-header nav a:hover { background: rgba(255, 255, 255, .06); color: var(--text); }

.x-link {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
}

.x-link:hover { border-color: var(--line-strong); }

.site-header a:focus-visible,
.site-footer a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.site-footer { border-top: 1px solid var(--line); }

.site-footer .bar {
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px 40px;
  padding-top: 32px;
  padding-bottom: 36px;
  color: var(--faint);
  font-size: 13px;
}

.site-footer .about { max-width: 460px; }
.site-footer .about p { margin: 12px 0 0; line-height: 1.6; }
.site-footer .links { display: grid; gap: 8px; }
.site-footer .links b { color: var(--muted); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }

.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--text); }

@media (max-width: 520px) {
  .site-header .bar { gap: 10px; padding: 0 16px; }
  .x-link span { display: none; }
  .site-header nav { display: none; }
  .x-link { padding: 8px; }
  .site-footer .bar { padding-left: 16px; padding-right: 16px; }
}