:root {
  color-scheme: light;
  --page: #f6f7f4;
  --surface: #ffffff;
  --ink: #212b28;
  --muted: #5c6862;
  --line: #d9dfda;
  --accent: #34614c;
  --focus: #1a5cb3;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-text-size-adjust: 100%;
}

* { box-sizing: border-box; }

html { min-width: 0; }

body {
  margin: 0;
  min-width: 0;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  background: var(--page);
  color: var(--ink);
  line-height: 1.7;
}

a { color: inherit; text-underline-offset: 0.2em; }

a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
  border-radius: 4px;
}

.wrap { width: min(100% - 3rem, 56rem); margin-inline: auto; }

.skip-link {
  position: absolute;
  z-index: 1;
  left: 1rem;
  top: 0;
  padding: 0.65rem 1rem;
  background: var(--surface);
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0.5rem); }

.site-header { padding-top: clamp(1.25rem, 4vw, 2.5rem); }

.wordmark {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.015em;
  text-decoration: none;
}

.wordmark span { color: var(--accent); }

main { flex: 1; }

.intro { padding-block: clamp(3.5rem, 10vw, 7rem) clamp(3rem, 7vw, 5rem); }

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.12em;
}

h1 {
  margin: 0;
  font-size: clamp(4rem, 12vw, 6.75rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.065em;
}

.title-dot { color: var(--accent); }

.intro-copy {
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2.5vw, 1.125rem);
  overflow-wrap: anywhere;
}

.links-section { padding-bottom: 3rem; }

h2 {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.link-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }

.link-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--surface);
}

.card-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; margin-bottom: 2rem; }

h3 { margin: 0; font-size: 1.25rem; font-weight: 600; overflow-wrap: anywhere; }

.card-symbol { color: var(--accent); font-size: 1.3rem; }

.card-actions { display: flex; flex-direction: column; gap: 0.25rem; margin-top: auto; }

.action-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  gap: 0.15rem;
  color: var(--accent);
  font-weight: 500;
  text-decoration: none;
}

.action-link > span:last-child { margin-left: auto; padding-left: 0.5rem; }

.action-link:hover { text-decoration: underline; }

.link-note { font-size: 0.85em; }

.action-link.secondary { color: var(--muted); }

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding-block: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8rem;
}

.not-found { padding-block: clamp(4rem, 12vw, 8rem); }
.not-found h1 { font-size: clamp(3.5rem, 12vw, 5rem); }
.not-found p { color: var(--muted); }
.back-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--accent); }

@media (max-width: 36rem) {
  .wrap { width: calc(100% - 2.5rem); }
  .link-grid { grid-template-columns: minmax(0, 1fr); }
  .card-heading { margin-bottom: 1rem; }
}

@media (forced-colors: active) {
  .link-card { border-color: CanvasText; }
}