:root {
  color-scheme: light;
  --color-primary: #d97a5a;
  --color-primary-ink: #ffffff;
  --color-accent: #7ba983;
  --color-background: #fbf6ee;
  --color-surface: #ffffff;
  --color-text: #2e2a24;
  --color-muted-text: #6b6355;
  --color-border: #efe7d8;
  --color-focus: #c4602f;
  --font-body: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-display: ui-serif, Georgia, "Songti SC", "Simsun", STSong, serif;
  --radius-sm: 0.5rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;
  --space-unit: 0.25rem;
  --content-width: 44rem;
  --max: 58rem;
}

* { box-sizing: border-box; }

html {
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100dvh;
  line-height: 1.7;
}

button, input, select, textarea { font: inherit; }

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

a { color: var(--color-primary); }

.skip-link {
  left: 1rem;
  position: fixed;
  top: 1rem;
  transform: translateY(-200%);
  z-index: 100;
  background: var(--color-surface);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}
.skip-link:focus { transform: translateY(0); }

.site-footer {
  padding: 2rem 1.25rem 2.5rem;
  text-align: center;
  color: var(--color-muted-text);
  font-size: 0.9rem;
  border-top: 1px solid var(--color-border);
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  text-decoration: none;
  transition: transform .15s ease, background .2s ease;
}
.btn:hover { background: #c96744; }
.btn:active { transform: translateY(1px); }
.btn.secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
}
.btn.secondary:hover { background: #faf3ea; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}