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.avatar{width:38px;height:38px;font-size:.85rem;flex-shrink:0}.profile-menu-head strong{display:block;line-height:1.2}.profile-menu-head small{color:var(--muted)}.profile-menu hr{border:0;border-top:1px solid var(--border);margin:6px 0;width:100%}.profile-menu button{display:flex;align-items:center;gap:9px}.profile-menu button i{width:18px;color:var(--muted)}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.skeleton{background:linear-gradient(90deg,var(--surface-2) 25%,color-mix(in srgb,var(--surface-2) 60%,var(--border)) 50%,var(--surface-2) 75%);background-size:200% 100%;animation:shimmer 1.5s ease-in-out 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.footer-inner{max-width:1100px;margin:0 auto}.skeleton-footer .footer-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:30px}.skeleton-footer .footer-brand,.skeleton-footer .footer-col{display:flex;flex-direction:column;gap:8px}.collapsible{border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:8px;overflow:hidden}.collapsible-trigger{width:100%;display:flex;justify-content:space-between;align-items:center;padding:14px 16px;background:var(--surface);border:none;cursor:pointer;font-weight:700;font-size:.95rem;color:var(--text);text-align:left;gap:10px}.collapsible-trigger:hover{background:var(--surface-2)}.collapsible-trigger i{font-size:.75rem;color:var(--muted);transition:transform .2s}.collapsible.open .collapsible-trigger i{transform:rotate(180deg)}.collapsible-content{padding:0 16px 16px;display:flex;flex-direction:column;gap:10px}.collapsible-content p{margin:0}.collapsible-content ul{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:6px}.auth-demo-section{margin-top:14px;padding-top:14px;border-top:1px solid var(--border)}.auth-demo-list{display:flex;flex-direction:column;gap:4px}.auth-demo-user{display:flex;flex-direction:column;gap:2px;padding:8px 10px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);cursor:pointer;text-align:left;font-size:.8rem}.auth-demo-user:hover{background:var(--surface-2);border-color:var(--brand)}.auth-demo-user strong{font-size:.82rem}.auth-demo-user .meta{font-size:.72rem}.plan-badge{display:inline-block;padding:1px 6px;border-radius:999px;font-size:.65rem;font-weight:700;background:var(--brand);color:#fff;line-height:1.4;margin-left:4px;text-transform:uppercase}.alert-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:grid;place-items:center;z-index:300;padding:20px;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:fadeIn .15s 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var(--border)}.alert-cancel:hover{background:var(--border)}.global-search{position:relative}.search-dropdown{position:absolute;top:100%;left:0;right:0;margin-top:6px;background:var(--surface);border:1px solid var(--border);border-radius:10px;box-shadow:0 12px 32px #0000002e;z-index:150;overflow:hidden;max-height:420px;overflow-y:auto}.search-dropdown-item{display:flex;align-items:center;gap:12px;width:100%;padding:10px 14px;border:none;background:none;cursor:pointer;text-align:left;font-size:.88rem;color:var(--text);transition:background .12s}.search-dropdown-item:hover{background:var(--surface-2)}.search-dropdown-cover{width:40px;height:40px;border-radius:6px;flex-shrink:0;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800;font-size:1rem}.search-dropdown-cover.is-subject{background:var(--surface-2);color:var(--brand)}.search-dropdown-meta{flex:1;min-width:0}.search-dropdown-meta strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:.88rem}.search-dropdown-meta .meta{font-size:.76rem}.search-dropdown-tag{padding:2px 8px;border-radius:999px;font-size:.65rem;font-weight:700;text-transform:uppercase;flex-shrink:0;line-height:1.4}.tag-book{background:var(--brand);color:#fff}.tag-chapter{background:#8b5cf6;color:#fff}.tag-subject{background:#f59e0b;color:#fff}.search-dropdown-arrow{color:var(--muted);font-size:.7rem;flex-shrink:0;opacity:0;transition:opacity .12s}.search-dropdown-item:hover .search-dropdown-arrow{opacity:1}.search-dropdown-more{display:flex;align-items:center;gap:8px;width:100%;padding:10px 14px;border:none;border-top:1px solid var(--border);background:none;cursor:pointer;font-size:.82rem;color:var(--brand);font-weight:600}.search-dropdown-more:hover{background:var(--surface-2)}.admin-login{min-height:100vh;display:grid;place-items:center;background:var(--bg);padding:20px}.admin-login-card{width:min(400px,100%);background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:36px 32px;box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;text-align:center}.admin-login-card h1{margin:0 0 4px;font-size:1.4rem}.admin-login-card .field{margin-bottom:12px;text-align:left}.admin-login-card .field label{display:block;font-size:.76rem;font-weight:800;color:var(--muted);margin-bottom:4px}.admin-login-card .field input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text);font-size:.9rem}.admin-login-card .field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 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24px;margin-bottom:0}.admin-logo{width:100%;height:64px;object-fit:contain;object-position:center}.admin-brand-text{min-width:0}.admin-brand-text strong{display:block;line-height:1.1;font-size:.92rem;color:#f0e0e6;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.admin-brand-text small{display:block;color:#c4a3b0;font-size:.72rem;margin-top:1px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.admin-nav{display:flex;flex-direction:column;gap:4px;padding:24px 12px 0;flex:1;overflow-y:auto;border-top:1px solid rgba(255,255,255,.1)}.admin-nav-section{padding:0 12px;margin-bottom:12px;text-transform:uppercase;font-size:10px;font-weight:600;letter-spacing:.2em;color:#fff6}.admin-nav button{border:1px solid transparent;background:transparent;color:#fff9;text-align:left;padding:12px 16px;border-radius:12px;font-weight:600;font-size:14px;display:flex;align-items:center;gap:12px;transition:all .2s ease;text-decoration:none}.admin-nav button i{font-size:18px;width:20px;text-align:center}.admin-nav button:hover{color:#fff;background:#ffffff0d}.admin-nav button.active{background:#76172b33;color:#e88a9a;border-color:#76172b4d}.admin-nav button.active i{color:#e88a9a}.admin-nav-group{display:flex;flex-direction:column;gap:2px}.admin-nav-group-toggle{font-weight:700}.admin-nav-group-toggle.has-active{color:#ffffffd9}.admin-nav-group-items{display:flex;flex-direction:column;gap:2px;padding-left:14px}.admin-nav-group-items button{padding:10px 16px;font-size:13px}.admin-nav-divider{height:1px;background:#ffffff1a;margin:16px 12px}.admin-sidebar-foot{margin-top:auto;padding:16px 12px;border-top:1px solid rgba(255,255,255,.1)}.admin-sidebar-foot .btn{width:100%;justify-content:flex-start;background:transparent;border:1px solid transparent;color:#fff9;font-weight:600;font-size:14px;padding:12px 16px;border-radius:12px;display:flex;align-items:center;gap:12px;transition:all .2s ease}.admin-sidebar-foot .btn i{font-size:18px;width:20px;text-align:center}.admin-sidebar-foot .btn:hover{color:#fff;background:#ffffff0d}.admin-sidebar-foot .btn.danger{color:#f87171}.admin-sidebar-foot .btn.danger:hover{color:#fca5a5;background:#f871711a}@media(max-width:768px){.admin-sidebar{width:288px;max-width:84vw;transform:translate(-100%);transition:transform .25s ease;padding:20px 0 12px}.admin-sidebar.open{transform:translate(0)}.admin-brand{padding:0 16px 12px}.admin-logo{height:48px}.admin-nav{gap:0;padding-top:12px}.admin-nav-section{margin-bottom:8px}.admin-nav button{padding:8px 14px}.admin-sidebar-foot{padding:12px}.admin-shell{grid-template-columns:1fr}.admin-toggle-btn{display:flex!important;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);cursor:pointer;font-size:.9rem}.admin-topbar{padding:0 12px;height:56px}.admin-content{padding:12px!important}.admin-stat-card{padding:14px;border-radius:12px}.admin-stat-card-top{margin-bottom:8px}.admin-stat-icon{width:36px;height:36px;border-radius:10px;font-size:.95rem}.admin-stat-value{font-size:1.25rem}.admin-stat-label{font-size:.78rem}.admin-stat-change{font-size:.65rem;padding:2px 6px}.home-stats .admin-stat-card{padding:12px;gap:10px}}@media(max-width:480px){.admin-stat-card{padding:12px}.admin-stat-value{font-size:1.1rem}}.admin-toggle-btn{display:none}.admin-workspace{min-width:0;margin-left:288px}@media(max-width:768px){.admin-workspace{margin-left:0}}.admin-topbar{position:sticky;top:0;z-index:35;display:flex;align-items:center;justify-content:space-between;gap:12px;height:64px;padding:0 24px;border-bottom:1px solid var(--border);background:var(--surface);box-shadow:0 1px 3px #0000000a}.admin-topbar-left{display:flex;align-items:center;gap:12px}.admin-topbar-left h1{font-size:1rem;font-weight:700;margin:0;color:var(--text)}.admin-breadcrumb{display:flex;align-items:center;gap:6px;font-size:.82rem;color:var(--muted)}.admin-breadcrumb span{color:var(--text);font-weight:600}.admin-topbar-right{display:flex;align-items:center;gap:8px}.admin-topbar-search{position:relative;display:none}.admin-topbar-search input{width:260px;min-height:38px;padding:8px 12px 8px 36px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);font-size:.85rem;transition:all .15s ease}.admin-topbar-search input:focus{border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 10%,transparent);outline:none}.admin-topbar-search i{position:absolute;left:11px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:.82rem}@media(min-width:769px){.admin-topbar-search{display:block}}.admin-profile-btn{display:inline-flex;align-items:center;gap:8px;border:1px solid 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70%)}.admin-hero:after{content:"";position:absolute;width:300px;height:300px;bottom:-80px;left:-80px;border-radius:50%;filter:blur(60px);opacity:.1;pointer-events:none;background:radial-gradient(circle,rgba(118,23,43,.3),transparent 70%)}.admin-hero-content{position:relative;z-index:1;display:flex;flex-direction:column;gap:12px}@media(min-width:769px){.admin-hero-content{flex-direction:row;align-items:center;justify-content:space-between}}.admin-hero h1{margin:0;font-size:clamp(1.4rem,1.2rem + 1vw,1.8rem);color:#fff;font-weight:800}.admin-hero p{margin:0;color:#fff9;font-size:.9rem}.admin-hero-filters{display:flex;gap:6px;flex-shrink:0}.admin-hero-filters button{padding:7px 14px;border-radius:8px;border:0;font-size:.78rem;font-weight:700;cursor:pointer;transition:all .15s ease}.admin-hero-filters button.active{background:var(--brand);color:#fff;box-shadow:0 2px 8px #76172b4d}.admin-hero-filters button:not(.active){background:#ffffff1a;color:#fff9}.admin-hero-filters button:not(.active):hover{background:#fff3;color:#fff}.admin-stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}.admin-stat-grid.cols-5{grid-template-columns:repeat(5,1fr)}@media(max-width:1280px)and (min-width:769px){.admin-stat-grid,.admin-stat-grid.cols-5{grid-template-columns:repeat(3,1fr)}}@media(max-width:1024px)and (min-width:769px){.admin-stat-grid,.admin-stat-grid.cols-5{grid-template-columns:repeat(2,1fr)}}@media(max-width:768px){.admin-stat-grid,.admin-stat-grid.cols-5{grid-template-columns:1fr!important}}.admin-stat-card{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:0 1px 3px #0000000a;transition:all .2s ease}.admin-stat-card:hover{box-shadow:0 4px 12px #00000014;border-color:color-mix(in srgb,var(--brand) 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