.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 50; background: rgba(20, 42, 31, 0.55); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid rgba(244, 241, 232, 0.08); transition: background 0.3s var(--ease-chalk), padding 0.3s var(--ease-chalk); }
.site-header.scrolled { background: rgba(20, 42, 31, 0.94); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 14px 24px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand-seal { width: 52px; height: 52px; font-size: 0.42rem; border-color: var(--marigold); color: var(--marigold); }
.brand-text strong { display: block; color: var(--chalk-white); font-family: var(--font-display); font-size: 1.02rem; line-height: 1.25; }
.brand-text small { display: block; color: var(--marigold-light); font-size: 0.68rem; font-family: var(--font-mono); letter-spacing: 0.3px; margin-top: 2px; }
.main-nav { display: flex; align-items: center; gap: 26px; }
.main-nav a { color: var(--chalk-white); font-size: 0.92rem; font-weight: 500; position: relative; padding: 6px 0; }
.main-nav a::after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--marigold); transition: width 0.3s var(--ease-chalk); }
.main-nav a:hover::after { width: 100%; }
.nav-dev-link { color: var(--marigold) !important; font-family: var(--font-mono); font-size: 0.8rem; border: 1px solid var(--marigold); padding: 7px 14px; border-radius: 6px; }
.nav-dev-link::after { display: none; }
.nav-admin-link { color: var(--seal-red) !important; border-color: var(--seal-red); }
.nav-dropdown { position: relative; }
.nav-dropdown-toggle { display: flex; align-items: center; gap: 6px; color: var(--chalk-white); font-size: 0.92rem; font-weight: 500; }
.nav-dropdown-toggle svg { transition: transform 0.25s var(--ease-chalk); color: var(--marigold-light); }
.nav-dropdown.open .nav-dropdown-toggle svg { transform: rotate(180deg); }
.nav-dropdown-menu { position: absolute; top: 140%; left: 0; background: var(--paper); min-width: 200px; border-radius: var(--radius-md); box-shadow: var(--shadow-stamp); padding: 8px; opacity: 0; visibility: hidden; transform: translateY(-8px); transition: all 0.25s var(--ease-chalk); }
.nav-dropdown.open .nav-dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown-menu a { display: block; color: var(--charcoal); padding: 9px 12px; border-radius: 6px; font-size: 0.85rem; font-family: var(--font-mono); }
.nav-dropdown-menu a::after { display: none; }
.nav-dropdown-menu a:hover { background: var(--paper-line); color: var(--ink); }
.header-actions { display: flex; align-items: center; gap: 14px; }
.nav-burger { display: none; flex-direction: column; gap: 5px; width: 26px; }
.nav-burger span { width: 100%; height: 2px; background: var(--chalk-white); border-radius: 2px; flex-shrink: 0; }
@media (max-width: 900px) {
  .main-nav { position: fixed; top: 0; right: -100%; height: 100vh; width: 78%; max-width: 320px; background: var(--chalkboard-deep); flex-direction: column; align-items: flex-start; padding: 90px 28px 28px; transition: right 0.35s var(--ease-chalk); overflow-y: auto; }
  .main-nav.open { right: 0; }
  .nav-burger { display: flex; z-index: 60; }
  .nav-dropdown-menu { position: static; opacity: 1; visibility: visible; transform: none; background: transparent; box-shadow: none; display: none; padding-left: 10px; }
  .nav-dropdown.open .nav-dropdown-menu { display: block; }
  .nav-dropdown-menu a { color: var(--chalk-white) !important; }
  .nav-dropdown-menu a:hover { background: rgba(244,241,232,0.1); color: var(--marigold-light) !important; }
  .brand-text small { display: none; }
}