/* Site-wide design tokens */
:root {
  --ink: #293849;
  --link: #225782;
  --header: #28394b;
  --border: #d8e0e6;
  --side: #e8edf1;
  --bg: #f5f7f9;
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.75 system-ui, -apple-system, "Segoe UI", sans-serif; }
body.nav-open { overflow: hidden; }
a { color: var(--link); }
a:hover { text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 3px solid #e3a62b; outline-offset: 3px; }
.site-header { background: var(--header); color: #fff; }
.header-inner { max-width: var(--max); margin: auto; min-height: 82px; display: flex; align-items: center; padding: 14px 24px; }
.site-title-button { display: inline-flex; align-items: center; gap: 16px; background: transparent; border: 0; padding: 8px 4px; color: #fff; cursor: pointer; text-align: left; }
.site-title { color: #fff; font-size: 1.5rem; font-weight: 700; line-height: 1.35; }
.menu-icon { display: flex; flex-direction: column; gap: 5px; flex: 0 0 auto; }
.menu-icon span { display: block; width: 27px; height: 3px; background: #fff; border-radius: 2px; }
.nav-overlay { position: fixed; inset: 0; z-index: 99; background: rgba(12, 24, 36, .55); opacity: 0; visibility: hidden; transition: opacity .25s ease, visibility .25s; }
.sidebar { position: fixed; top: 0; bottom: 0; left: 0; z-index: 100; width: min(320px, 88vw); padding: 22px; overflow-y: auto; background: var(--side); box-shadow: 8px 0 24px rgba(0, 0, 0, .12); transform: translateX(-105%); visibility: hidden; transition: transform .25s ease, visibility .25s; }
body.nav-open .nav-overlay { opacity: 1; visibility: visible; }
body.nav-open .sidebar { transform: translateX(0); visibility: visible; }
.sidebar-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 14px; }
.sidebar h2 { font-size: 1.05rem; margin: 0; }
.nav-close { border: 0; background: transparent; color: var(--ink); font-size: 2rem; line-height: 1; cursor: pointer; min-width: 44px; min-height: 44px; }
.sidebar ul { margin: 0; padding: 0; list-style: none; }
.sidebar li { border-bottom: 1px solid #cfd8e0; }
.sidebar a { display: block; padding: 12px 4px; text-decoration: none; }
.sidebar a[aria-current="page"] { font-weight: 700; color: var(--ink); }
.page { max-width: var(--max); margin: 24px auto; padding: 0 24px; }
.content { background: #fff; border: 1px solid var(--border); min-height: 420px; padding: 28px 36px; overflow-wrap: anywhere; }
.content h1 { margin: 0 0 20px; padding-bottom: 12px; border-bottom: 1px solid var(--border); font-size: clamp(1.4rem, 3vw, 1.75rem); }
.content h2 { font-size: 1.25rem; margin-top: 28px; }
.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.card { border: 1px solid var(--border); border-radius: 4px; padding: 16px; }
.card h3 { margin: 0 0 6px; }
.card p { margin: 0; }
.site-footer { border-top: 1px solid var(--border); padding: 22px 16px; text-align: center; color: #596a7b; }
.site-footer nav { display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; margin-bottom: 8px; }
.site-footer a { text-decoration: none; }
@media (max-width: 700px) {
  .header-inner { min-height: 68px; padding: 10px 16px; }
  .site-title-button { gap: 12px; }
  .site-title { font-size: 1.12rem; }
  .page { padding: 0 12px; margin: 12px auto; }
  .content { min-height: 320px; padding: 20px 16px; }
  .cards { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .sidebar, .nav-overlay { transition: none; }
}