/* Shared navigation: usable links without JavaScript; enhanced drawer on mobile. */
body { --sidebar-width: 256px; }
.site-content { margin-left: var(--sidebar-width); min-width: 0; container-type: inline-size; }
.site-sidebar { position: fixed; inset: 0 auto 0 0; z-index: 60; width: var(--sidebar-width); padding: 22px 16px; background: var(--bg-raised); border-right: 1px solid var(--line); display: flex; flex-direction: column; overflow-y: auto; }
.sidebar-heading { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 35px; }
.sidebar-brand { color: var(--ink); text-decoration: none; font-size: 1.1rem; font-weight: 750; white-space: nowrap; }
.sidebar-brand span { display: block; font-size: .75rem; color: var(--ink-dim); font-weight: 400; margin-top: 2px; }
.icon-button { border: 1px solid var(--line); background: var(--bg); color: var(--ink); border-radius: 10px; width: 44px; height: 44px; flex-shrink: 0; display: inline-grid; place-items: center; cursor: pointer; }
.icon-button svg, .sidebar-icon svg { width: 20px; height: 20px; }
.sidebar-toggle { display: none; }
.shell-ready .sidebar-toggle { display: inline-grid; }
.sidebar-nav { display: grid; gap: 6px; }
.sidebar-link { display: flex; align-items: center; gap: 12px; min-height: 46px; padding: 8px 10px; border-radius: 10px; color: var(--ink-dim); text-decoration: none; font-size: .88rem; font-weight: 550; }
.sidebar-link:hover { background: var(--bg); color: var(--ink); }
.sidebar-link[aria-current="page"] { background: var(--bg); color: var(--vermillion); box-shadow: 0 0 0 1px var(--line); }
.sidebar-icon { display: inline-grid; place-items: center; width: 24px; flex-shrink: 0; font-size: .82rem; font-weight: 750; }
.sidebar-label { color: var(--ink-faint); font-size: .65rem; letter-spacing: .13em; margin: 25px 10px 7px; }
.sidebar-bottom { margin-top: auto; padding-top: 40px; }
.sidebar-bottom p { color: var(--ink-faint); font-size: .75rem; padding: 0 10px 15px; }
.sidebar-collapsed { --sidebar-width: 76px; }
.sidebar-collapsed .sidebar-text { display: none; }
.sidebar-collapsed .sidebar-heading { justify-content: center; }
.sidebar-collapsed .sidebar-link { justify-content: center; padding-inline: 0; }
.site-mobile-bar, .sidebar-backdrop { display: none; }
.library { max-width: 1180px; min-height: calc(100dvh - 140px); padding: clamp(24px, 5vw, 72px) clamp(20px, 4vw, 56px); }
.library-header { padding-block: 15px 60px; }
.library-kicker { color: var(--vermillion); font-size: .7rem; font-weight: 750; letter-spacing: .16em; }
.library-header h1 { font-size: clamp(2.1rem, 4vw, 3.8rem); letter-spacing: -.045em; line-height: 1.12; margin: 20px 0; }
.library-header > p:last-child { color: var(--ink-dim); font-size: 1.1rem; line-height: 1.7; }
.library-section-heading { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.library-section-heading h2 { font-size: 1.1rem; }
.library-section-heading > span { color: var(--ink-dim); font-size: .8rem; }
.guide-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 290px), 1fr)); gap: 20px; }
.guide-card, .guide-placeholder { padding: clamp(22px, 3vw, 32px); border: 1px solid var(--line); border-radius: 18px; }
.guide-card { display: flex; flex-direction: column; text-decoration: none; color: var(--ink); background: var(--bg-raised); }
.guide-card:hover { border-color: var(--vermillion); }
.guide-symbol { display: grid; place-items: center; width: 56px; height: 56px; background: var(--ink); color: var(--bg); border-radius: 15px; font-size: 1.3rem; font-weight: 750; margin-bottom: 35px; }
.guide-category { color: var(--ink-dim); font-size: .75rem; margin-bottom: 8px; }
.guide-card h3 { font-size: 1.4rem; letter-spacing: -.025em; margin-bottom: 12px; }
.guide-card p, .guide-placeholder p { color: var(--ink-dim); font-size: .9rem; line-height: 1.65; }
.guide-open { display: flex; justify-content: space-between; margin-top: auto; padding-top: 30px; color: var(--vermillion); font-size: .85rem; font-weight: 650; }
.guide-placeholder { display: flex; flex-direction: column; justify-content: center; border-style: dashed; }
.guide-placeholder > span { font-size: 2rem; color: var(--ink-faint); margin-bottom: 18px; }
.guide-placeholder h3 { font-size: 1rem; margin-bottom: 8px; }
.library-footer { max-width: 1180px; margin: auto; padding: 24px clamp(20px, 4vw, 56px); border-top: 1px solid var(--line); color: var(--ink-dim); font-size: .8rem; display: flex; flex-wrap: wrap; gap: 12px 30px; align-items: center; justify-content: space-between; }
@container (max-width: 860px) { .op-body-grid { grid-template-columns: 1fr; } .footer-inner { grid-template-columns: 1fr; } }
@container (max-width: 780px) { .team-grid { grid-template-columns: 1fr; } }
@container (max-width: 700px) { .rotation-strip, .skill-list-grid { grid-template-columns: 1fr; } }
@container (max-width: 620px) { .skill-grid { grid-template-columns: 1fr; } }
@media (max-width: 900px) {
  .site-content { margin-left: 0; }
  .site-sidebar { position: relative; width: 100%; max-height: none; border-right: 0; border-bottom: 1px solid var(--line); }
  .sidebar-heading { margin-bottom: 16px; }
  .sidebar-bottom { padding-top: 20px; }
  .shell-ready .site-mobile-bar { display: flex; position: sticky; top: 0; z-index: 30; align-items: center; gap: 12px; padding: 10px 16px; background: var(--bg); border-bottom: 1px solid var(--line); }
  .shell-ready .navigation { top: 65px; }
  .site-mobile-bar a { color: var(--ink); text-decoration: none; font-size: .95rem; font-weight: 700; }
  .shell-ready .site-sidebar { position: fixed; width: min(300px, calc(100% - 48px)); height: 100dvh; visibility: hidden; transform: translateX(-100%); }
  .shell-ready .sidebar-open .site-sidebar { visibility: visible; transform: translateX(0); }
  .sidebar-open { overflow: hidden; }
  .sidebar-backdrop:not([hidden]) { display: block; position: fixed; inset: 0; width: 100%; height: 100%; border: 0; background: #0008; z-index: 50; }
  .library { min-height: calc(100dvh - 240px); }
  .library-header { padding-bottom: 40px; }
}
@media print { .site-sidebar, .site-mobile-bar, .sidebar-backdrop { display: none !important; } .site-content { margin-left: 0; } }