:root {
  color-scheme: light;
  --paper: #f3efe6;
  --ink: #18231d;
  --muted: #667069;
  --accent: #c65332;
  --accent-dark: #92351f;
  --line: rgba(24, 35, 29, 0.16);
  --card: rgba(255, 253, 248, 0.88);
}

* { box-sizing: border-box; }

html { min-height: 100%; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 15%, rgba(198, 83, 50, 0.12), transparent 28rem),
    linear-gradient(135deg, transparent 0 49.7%, rgba(24, 35, 29, 0.055) 49.8% 50.2%, transparent 50.3%) 0 0 / 42px 42px,
    var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.page-shell {
  width: min(100% - 32px, 720px);
  margin: 0 auto;
  padding: clamp(48px, 10vh, 112px) 0 32px;
}

.card {
  position: relative;
  overflow: hidden;
  padding: clamp(32px, 7vw, 64px);
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--card);
  box-shadow: 0 24px 70px rgba(24, 35, 29, 0.12);
  backdrop-filter: blur(12px);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: var(--accent);
}

.eyebrow {
  margin: 0 0 24px;
  color: var(--accent-dark);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.17em;
}

.status-mark {
  float: right;
  display: grid;
  width: 54px;
  height: 54px;
  margin: -8px 0 12px 20px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-family: Georgia, serif;
  font-size: 1.75rem;
}

h1 {
  max-width: 520px;
  margin: 0;
  font-family: Georgia, "Noto Serif SC", "Songti SC", serif;
  font-size: clamp(2.4rem, 8vw, 4.5rem);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.lead {
  max-width: 560px;
  margin: 24px 0 32px;
  color: var(--muted);
  font-size: clamp(1rem, 2.4vw, 1.12rem);
  line-height: 1.85;
}

.primary-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 20px;
  color: white;
  background: var(--ink);
  text-decoration: none;
  transition: background-color 160ms ease, transform 160ms ease;
}

.primary-link:hover { background: var(--accent-dark); transform: translateY(-2px); }
.primary-link:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.primary-link span { font-size: 0.85rem; color: rgba(255,255,255,0.7); }
.primary-link strong { overflow-wrap: anywhere; font-size: 1.05rem; }

.divider { height: 1px; margin: 36px 0 28px; background: var(--line); }
.contact-block h2 { margin: 0 0 8px; font-family: Georgia, "Noto Serif SC", serif; font-size: 1.25rem; }
.contact-block > p { margin: 0 0 22px; color: var(--muted); line-height: 1.7; }
.contact-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.contact-list li { display: grid; grid-template-columns: 72px 1fr; align-items: baseline; gap: 12px; }
.contact-list span { color: var(--muted); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 0.75rem; text-transform: uppercase; }
.contact-list a, .back-link { color: var(--ink); text-decoration-color: var(--accent); text-underline-offset: 4px; }
.contact-list a:hover, .back-link:hover { color: var(--accent-dark); }

.error-code {
  position: absolute;
  top: -40px;
  right: 20px;
  margin: 0;
  color: rgba(198, 83, 50, 0.07);
  font-family: Georgia, serif;
  font-size: clamp(9rem, 30vw, 15rem);
  line-height: 1;
  pointer-events: none;
}

.card--404 h1 { max-width: 600px; font-size: clamp(2.2rem, 7vw, 4rem); }
.back-link { display: inline-block; margin-top: 28px; font-size: 0.88rem; }
.site-footer {
  padding: 22px 0 0;
  color: var(--muted);
  font-size: 0.72rem;
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: 0.08em;
}

.record-links {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.record-links a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  line-height: 1.6;
  text-decoration: none;
  transition: color 160ms ease;
}

.record-links a:hover { color: var(--accent-dark); }
.record-separator { color: var(--line); }
.record-badge {
  display: inline-grid;
  width: 17px;
  height: 17px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 9px;
  font-weight: 700;
  line-height: 1;
}

@media (max-width: 520px) {
  .page-shell { width: min(100% - 20px, 720px); padding-top: 20px; }
  .card { padding: 30px 24px 34px; }
  .status-mark { width: 44px; height: 44px; }
  .primary-link { align-items: flex-start; flex-direction: column; gap: 6px; }
  .record-links { flex-direction: column; gap: 5px; }
  .record-separator { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}

@media (prefers-color-scheme: dark) {
  :root { color-scheme: dark; --paper: #111713; --ink: #eef1ea; --muted: #a5afa8; --accent: #e47756; --accent-dark: #f08a68; --line: rgba(238, 241, 234, 0.16); --card: rgba(24, 33, 28, 0.9); }
  body { background: radial-gradient(circle at 12% 15%, rgba(228, 119, 86, 0.12), transparent 28rem), var(--paper); }
  .primary-link { color: #111713; background: #eef1ea; }
  .primary-link span { color: rgba(17, 23, 19, 0.62); }
  .primary-link:hover { color: white; background: #92351f; }
}