:root {
  --container: 1140px;
  --gutter: 20px;
  --radius: 16px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  z-index: 9999;
}

.skip-link:focus {
  left: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 80px;
  background: rgba(247, 247, 247, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(15, 61, 46, 0.1);
  transition: height 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.site-header.shrink {
  height: 60px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
  background: rgba(247, 247, 247, 0.96);
}

.nav {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.layout {
  max-width: var(--container);
  margin: 0 auto;
  padding: 28px var(--gutter) 60px;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 28px;
  align-items: start;
}

.content {
  min-width: 0;
}

.sidebar {
  position: sticky;
  top: calc(80px + 18px);
}

.site-header.shrink ~ .layout .sidebar {
  top: calc(60px + 18px);
}

.site-footer {
  background: #0a2d22;
  color: rgba(255, 255, 255, 0.88);
  border-top: 1px solid rgba(200, 169, 81, 0.2);
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 28px var(--gutter);
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.2fr;
  gap: 18px;
  align-items: start;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.9);
}

.site-footer a:hover {
  color: var(--gold-500);
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
  }
  .footer-inner {
    grid-template-columns: 1fr;
  }
}