:root{--bg:#f6f7fb;--sidebar-bg:#fff;--card-bg:#fff;--border:#e5e7ef;--text:#374151;--text-dim:#9ca3af;--text-h:#111827;--accent:#4f46e5;--accent-hover:#4338ca;--accent-soft:#4f46e514;--danger:#ef4444;--danger-hover:#dc2626;--shadow:0 1px 3px #1018280f, 0 1px 2px #1018280a;--shadow-lg:0 10px 30px #1018281f}@media (prefers-color-scheme:dark){:root{--bg:#0f1117;--sidebar-bg:#161922;--card-bg:#1a1e2a;--border:#262b3a;--text:#c9d1e0;--text-dim:#6b7280;--text-h:#f3f4f6;--accent:#818cf8;--accent-hover:#a5b4fc;--accent-soft:#818cf81f;--shadow:0 1px 3px #0006;--shadow-lg:0 10px 30px #00000080}}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:14px;line-height:1.5}button{cursor:pointer;color:inherit;background:0 0;border:none;font-family:inherit}.app{min-height:100vh;display:flex}.sidebar{background:var(--sidebar-bg);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;width:260px;height:100vh;display:flex;position:sticky;top:0}.brand{align-items:center;gap:10px;padding:20px 20px 16px;display:flex}.brand-icon{font-size:22px}.brand h1{color:var(--text-h);margin:0;font-size:18px;font-weight:700}.sidebar-head{justify-content:space-between;align-items:center;padding:8px 16px 8px 20px;display:flex}.sidebar-title{letter-spacing:.08em;text-transform:uppercase;color:var(--text-dim);font-size:12px;font-weight:600}.icon-btn{width:26px;height:26px;color:var(--accent);border-radius:6px;justify-content:center;align-items:center;font-size:18px;transition:background .15s;display:flex}.icon-btn:hover{background:var(--accent-soft)}.folder-list{flex-direction:column;flex:1;gap:2px;padding:4px 10px 12px;display:flex;overflow-y:auto}.folder-item{color:var(--text);text-align:left;border-radius:8px;align-items:center;gap:8px;width:100%;padding:8px 10px;transition:background .15s;display:flex}.folder-item:hover{background:var(--accent-soft)}.folder-item.active{background:var(--accent-soft);color:var(--accent);font-weight:600}.folder-icon{font-size:16px}.folder-name{text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.folder-count{color:var(--text-dim);background:var(--bg);border-radius:99px;padding:1px 8px;font-size:12px}.folder-actions{gap:2px;display:none}.folder-item:hover .folder-actions{display:flex}.mini-btn{width:22px;height:22px;color:var(--text-dim);border-radius:5px;justify-content:center;align-items:center;font-size:12px;display:flex}.mini-btn:hover{background:var(--card-bg);color:var(--text-h)}.mini-btn.danger:hover{color:var(--danger)}.empty-hint{color:var(--text-dim);padding:12px;font-size:13px}.main{flex:1;padding:32px 40px;overflow-y:auto}.main-head{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.main-head h2{color:var(--text-h);margin:0;font-size:24px;font-weight:700}.primary-btn{background:var(--accent);color:#fff;border-radius:8px;padding:9px 18px;font-size:14px;font-weight:600;transition:background .15s}.primary-btn:hover{background:var(--accent-hover)}.bookmark-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;display:grid}.bookmark-card{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:12px;transition:transform .15s,box-shadow .15s;overflow:hidden}.bookmark-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.bookmark-main{text-align:left;flex-direction:column;gap:12px;width:100%;padding:20px 20px 12px;display:flex}.favicon-wrap{color:#fff;border-radius:12px;justify-content:center;align-items:center;width:44px;height:44px;font-size:20px;font-weight:700;display:flex;overflow:hidden}.favicon-wrap img{object-fit:cover;width:100%;height:100%}.bookmark-info{min-width:0}.bookmark-name{color:var(--text-h);text-overflow:ellipsis;white-space:nowrap;font-size:15px;font-weight:600;overflow:hidden}.bookmark-url{color:var(--text-dim);text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.bookmark-actions{opacity:0;gap:4px;padding:0 12px 12px;transition:opacity .15s;display:flex}.bookmark-card:hover .bookmark-actions{opacity:1}.text-btn{color:var(--text-dim);border-radius:6px;padding:4px 8px;font-size:12px}.text-btn:hover{color:var(--accent);background:var(--accent-soft)}.text-btn.danger:hover{color:var(--danger);background:#ef44441a}.empty-state{text-align:center;color:var(--text-dim);flex-direction:column;align-items:center;gap:12px;padding:80px 20px;display:flex}.empty-icon{margin:0;font-size:48px}.empty-state p{margin:0}.modal-mask{z-index:100;background:#00000073;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal{background:var(--card-bg);width:400px;max-width:calc(100vw - 32px);box-shadow:var(--shadow-lg);border-radius:14px;padding:24px}.modal h3{color:var(--text-h);margin:0 0 20px;font-size:17px;font-weight:700}.field{flex-direction:column;gap:6px;margin-bottom:14px;display:flex}.field span{color:var(--text);font-size:13px;font-weight:600}.field input{border:1px solid var(--border);background:var(--bg);color:var(--text-h);border-radius:8px;outline:none;padding:10px 12px;font-size:14px;transition:border-color .15s}.field input:focus{border-color:var(--accent)}.form-error{color:var(--danger);margin:4px 0 12px;font-size:13px}.modal-actions{justify-content:flex-end;gap:10px;margin-top:20px;display:flex}.ghost-btn{color:var(--text);border:1px solid var(--border);border-radius:8px;padding:9px 18px;font-size:14px;transition:background .15s}.ghost-btn:hover{background:var(--bg)}@media (width<=720px){.sidebar{width:200px}.main{padding:24px 20px}.bookmark-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}}