/* Buckminister fallback pages. System fonts only, no external requests. */
:root {
  color-scheme: light dark;
  --bg: #f5f5f7;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: #55555a;          /* 7.3:1 on --bg */
  --line: #d2d2d7;
  --accent: #0062cc;         /* white text on it: 5.9:1 */
  --accent-text: #ffffff;
  --focus: #0062cc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card: #1c1c1e;
    --text: #f5f5f7;
    --muted: #a1a1a6;        /* 7.9:1 on --card */
    --line: #38383a;
    --accent: #64a8ff;       /* dark text on it: 8.0:1 */
    --accent-text: #001a3a;
    --focus: #64a8ff;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 1rem/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.skip {
  position: absolute; left: 1rem; top: -4rem;
  padding: .75rem 1rem; border-radius: .5rem;
  background: var(--card); color: var(--text); border: 2px solid var(--focus);
}
.skip:focus { top: 1rem; }

header, main, footer { width: 100%; max-width: 40rem; margin: 0 auto; padding-inline: 1.5rem; }
header { padding-block: 1.5rem 0; }
main { flex: 1; padding-block: 2.5rem; }
footer { padding-block: 1.5rem 2rem; color: var(--muted); font-size: .875rem; }

.brand { display: inline-flex; align-items: center; gap: .625rem; color: var(--text); text-decoration: none; font-weight: 700; font-size: 1.125rem; }
.brand svg { width: 2rem; height: 2rem; flex: none; }

h1 { margin: 0 0 1rem; font-size: clamp(1.875rem, 6vw, 2.75rem); line-height: 1.15; letter-spacing: -.02em; }
p { margin: 0 0 1rem; max-width: 34rem; }
.lead { font-size: 1.125rem; }
.muted { color: var(--muted); }

.card {
  margin-block: 1.5rem;
  padding: 1.25rem 1.5rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 1rem;
}
.card p:last-child { margin-bottom: 0; }

.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 3rem; padding: .75rem 1.5rem;
  border-radius: .75rem;
  background: var(--accent); color: var(--accent-text);
  font-weight: 600; font-size: 1.0625rem; text-decoration: none;
  cursor: pointer;
}
.button:hover { filter: brightness(1.08); }

a { color: var(--accent); }
a:focus-visible, .button:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }

@media (prefers-reduced-motion: no-preference) {
  .button { transition: filter .2s ease; }
}
@media (max-width: 30rem) {
  .button { width: 100%; }
}