.header{-webkit-backdrop-filter:blur(18px);background:color-mix(in oklab, var(--surface) 88%, transparent);border-bottom:1px solid color-mix(in oklab, var(--line) 86%, transparent);z-index:100;position:sticky;top:0;box-shadow:0 10px 26px #0f172a0f}:root[data-theme=dark] .header{background:color-mix(in oklab, var(--surface) 84%, transparent)}:root[data-theme=light] .header{background:color-mix(in oklab, var(--surface) 88%, transparent)}@media (prefers-color-scheme:dark){:root:not([data-theme]) .header{background:color-mix(in oklab, var(--surface) 84%, transparent)}}.header-content{justify-content:space-between;align-items:center;gap:16px;max-width:1180px;margin:0 auto;padding:12px 20px;display:flex}.header-top{justify-content:space-between;align-items:center;gap:16px;width:auto;display:flex}.logo{color:var(--brand);letter-spacing:0;font-size:21px;font-weight:700;font-family:var(--font-head)}.nav{flex:1;justify-content:space-between;align-items:center;gap:12px;min-width:0;font-size:15px;font-weight:500;display:flex}.nav-primary{scrollbar-width:none;flex-wrap:nowrap;align-items:center;gap:4px;min-width:0;display:flex;overflow-x:auto}.nav-primary::-webkit-scrollbar{display:none}.nav-actions{align-items:center;gap:10px;margin-left:auto;display:flex}.nav-toggle{border:1px solid var(--line);width:40px;height:40px;color:var(--text);cursor:pointer;background:0 0;border-radius:10px;justify-content:center;align-items:center;display:none}.nav-toggle.open{color:var(--brand-600);background:#0ea5a41a}.theme-toggle{border:1px solid var(--line);background:color-mix(in oklab, var(--surface) 92%, transparent);width:40px;height:40px;color:var(--text);cursor:pointer;border-radius:10px;justify-content:center;align-items:center;transition:border-color .2s,color .2s,background .2s,transform .2s;display:inline-flex}.theme-toggle:hover{border-color:color-mix(in oklab, var(--brand) 45%, var(--line));color:var(--brand-600);background:color-mix(in oklab, var(--brand) 12%, var(--surface));transform:translateY(-1px)}.theme-toggle svg{width:18px;height:18px}.theme-toggle.light .icon-sun,.theme-toggle.dark .icon-moon{display:none}.nav a{color:var(--text);text-decoration:none;transition:color .2s}.nav a:hover{color:var(--brand)}.nav-link{white-space:nowrap;border-radius:999px;padding:8px 11px;transition:background .2s,color .2s,box-shadow .2s}.nav-badge{background:var(--brand);color:#fff;border-radius:999px;justify-content:center;align-items:center;min-width:18px;height:18px;margin-left:6px;padding:0 6px;font-size:11px;display:inline-flex}.nav-link.active:not(.btn-primary):not(.btn-secondary){color:var(--brand-600);background:#0ea5a429;box-shadow:inset 0 0 0 1px #0ea5a440}.nav-link.active.btn-primary{box-shadow:0 0 0 2px #0ea5a440}.nav-avatar{border:1px solid var(--line);background:#0f172a14;border-radius:999px;justify-content:center;align-items:center;width:34px;height:34px;display:inline-flex;overflow:hidden}.nav-avatar img{object-fit:cover;width:100%;height:100%}.nav-initial{width:100%;height:100%;color:var(--text);justify-content:center;align-items:center;font-size:12px;font-weight:600;display:inline-flex}.account-menu,.post-menu{position:relative}.post-trigger{border:1px solid var(--line);background:color-mix(in oklab, var(--surface) 92%, var(--bg) 8%);cursor:pointer;justify-content:space-between;align-items:center;gap:8px;display:inline-flex}.post-trigger-main{align-items:center;gap:6px;display:inline-flex}.post-dropdown{min-width:220px}.account-trigger{border:1px solid color-mix(in oklab, var(--line) 90%, transparent);background:color-mix(in oklab, var(--surface) 92%, var(--bg) 8%);color:var(--text);cursor:pointer;border-radius:999px;align-items:center;gap:8px;padding:8px 11px;font-size:14px;display:inline-flex}.account-trigger:hover{background:#0ea5a414}.account-dropdown{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-soft);z-index:120;border-radius:10px;min-width:180px;display:grid;position:absolute;top:calc(100% + 8px);right:0;overflow:hidden}.account-dropdown.menu-grid{grid-template-columns:repeat(2,minmax(140px,1fr));gap:12px 18px;min-width:320px;padding:10px}.account-dropdown.align-left{left:0;right:auto}.account-item{color:var(--text);text-align:left;cursor:pointer;background:0 0;border:none;padding:10px 12px;font-size:14px}.menu-item{align-items:center;gap:10px;display:flex}.menu-icon{width:18px;height:18px;color:var(--brand-600);justify-content:center;align-items:center;display:inline-flex}.menu-count{margin-left:auto}.menu-title{letter-spacing:.18em;text-transform:uppercase;color:var(--muted);padding:8px 12px 4px;font-size:11px}.menu-divider{background:var(--line);height:1px;margin:4px 0}.menu-section{gap:6px;display:grid}.menu-section-divider{border-left:1px solid var(--line);padding-left:12px}.account-dropdown.menu-grid .account-item{padding:8px 10px}.account-item:hover{color:var(--brand-600);background:#0ea5a414}.account-logout{color:var(--danger)}.header-search{flex:1;min-width:0;max-width:420px;position:relative}.header-search input{border:1px solid var(--line);background:color-mix(in oklab, var(--surface) 92%, var(--bg) 8%);width:100%;height:40px;color:var(--text);border-radius:999px;padding:0 44px 0 38px;font-size:14px}.header-search input:focus{border-color:var(--brand);outline:none}.header-search-icon{color:var(--muted);pointer-events:none;display:inline-flex;position:absolute;top:50%;left:12px;transform:translateY(-50%)}.header-search-kbd{border:1px solid var(--line);background:color-mix(in oklab, var(--surface) 88%, transparent);color:var(--muted);font-size:11px;font-family:var(--font-body);pointer-events:none;border-radius:6px;padding:2px 6px;position:absolute;top:50%;right:10px;transform:translateY(-50%)}@media (max-width:980px){.header-search{display:none}}.notif-bell{position:relative}.notif-trigger{border:1px solid var(--line);background:color-mix(in oklab, var(--surface) 92%, transparent);width:40px;height:40px;color:var(--text);cursor:pointer;border-radius:10px;justify-content:center;align-items:center;display:inline-flex;position:relative}.notif-trigger:hover{border-color:color-mix(in oklab, var(--brand) 38%, var(--line));background:color-mix(in oklab, var(--brand) 9%, var(--surface))}.notif-badge{background:var(--danger);color:#fff;border-radius:999px;justify-content:center;align-items:center;min-width:17px;height:17px;padding:0 4px;font-size:10px;font-weight:700;display:inline-flex;position:absolute;top:-4px;right:-4px}.notif-dropdown{min-width:320px;max-width:360px;max-height:420px;overflow-y:auto}.notif-head{justify-content:space-between;align-items:center;padding:4px 4px 0;display:flex}.notif-mark-all{color:var(--brand-600);cursor:pointer;background:0 0;border:none;padding:8px 12px 4px;font-size:12px;font-weight:700}.notif-empty{text-align:center;color:var(--muted);padding:20px 14px;font-size:13px}.notif-item{border-top:1px solid var(--line);padding:10px 14px;display:block}.notif-item:hover,.notif-item.unread{background:color-mix(in oklab, var(--brand) 6%, transparent)}.notif-item-title{color:var(--text);font-size:13px;font-weight:700}.notif-item-body{color:var(--muted);margin-top:2px;font-size:12px;line-height:1.4}.notif-item-time{color:var(--muted);margin-top:4px;font-size:11px}.notif-view-all{text-align:center;border-top:1px solid var(--line);color:var(--brand-600);padding:10px;font-size:12px;font-weight:700;display:block}@media (max-width:900px){.header-content{flex-direction:column;align-items:stretch;gap:6px;padding:10px 14px}.header-top{gap:10px;width:100%}.logo{letter-spacing:.02em;font-size:18px}.nav-toggle{border-radius:10px;width:36px;height:36px;display:inline-flex}.nav{border-top:1px solid var(--line);flex-direction:column;gap:6px;width:100%;padding-top:6px;display:none}.nav-primary,.nav-actions{flex-direction:column;align-items:stretch;gap:8px;width:100%;overflow:visible}.nav-primary{display:none}.nav-actions{margin-left:0}.nav.is-open{display:flex}.nav a{width:100%;display:block}.account-menu,.post-menu{width:100%}.account-trigger{justify-content:space-between;width:100%}.post-trigger{width:100%}.theme-toggle{border-radius:999px;justify-content:flex-start;width:100%;height:42px;padding:0 14px}.account-dropdown{box-shadow:none;margin-top:8px;position:static}.post-dropdown{width:100%;min-width:0}.account-dropdown.menu-grid{grid-template-columns:1fr;min-width:0}.menu-section-divider{border-left:none;padding-left:0}}@media (max-width:480px){.header-content{padding:8px 11px}.logo{font-size:17px}}.nav-post{align-items:center;gap:6px;display:inline-flex}.nav-post-icon{width:28px;height:28px;color:var(--brand-600);background:#0ea5a41f;border-radius:999px;justify-content:center;align-items:center;display:inline-flex}.nav-post-label{display:none}@media (max-width:900px){.nav-post-label{display:inline}}