.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.container.narrow, .narrow { max-width: 780px; }
main { flex: 1; padding: 28px 0 56px; outline: none; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 40;
  height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.header-inner { height: 100%; display: flex; align-items: center; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none !important; }
.brand-name { font: 800 1rem/1 var(--font-display); letter-spacing: .06em; }
.brand-name b { color: var(--accent); margin-left: 2px; }
.main-nav { margin-left: auto; }
.main-nav ul { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.main-nav a {
  display: block; padding: 8px 12px; border-radius: 10px;
  color: var(--muted); font-weight: 500; font-size: .92rem; text-decoration: none;
  transition: color var(--fast), background var(--fast);
}
.main-nav a:hover { color: var(--text); background: var(--surface); }
.main-nav a[aria-current="page"] { color: var(--text); background: var(--surface-2); }
.main-nav .nav-toggle { display: none; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 22px 0; font-size: .85rem; color: var(--muted); }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }

.page-head { margin-bottom: 24px; }
.page-head.row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; }
.page-head h1 { margin: 0; }
.section-title { margin: 28px 0 12px; color: var(--muted); font-size: .85rem; letter-spacing: .1em; text-transform: uppercase; font-family: var(--font-body); }

@media (max-width: 860px) {
  .main-nav .nav-toggle { display: inline-grid; place-items: center; align-content: center; gap: 4px; }
  .nav-toggle span { display: block; width: 18px; height: 2px; background: currentColor; border-radius: 2px; transition: transform var(--fast); }
  .nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3px) rotate(-45deg); }
  .main-nav ul {
    position: absolute; left: 0; right: 0; top: var(--header-h);
    flex-direction: column; padding: 10px 16px 16px;
    background: var(--surface-solid); border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: none;
  }
  .main-nav ul.open { display: flex; }
  .main-nav a { padding: 12px; }
}

@media (max-width: 560px) {
  .container { padding: 0 14px; }
  main { padding-top: 18px; }
  .brand-name { font-size: .9rem; }
}