:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #eff6ff;--sidebar-bg: #0f172a;--sidebar-text: #94a3b8;--sidebar-active: #2563eb;--bg: #f1f5f9;--card: #ffffff;--text: #1e293b;--text-secondary: #64748b;--border: #e2e8f0;--success: #16a34a;--warning: #d97706;--danger: #dc2626;--radius: 12px;--shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.04)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}a{color:var(--primary);text-decoration:none}button{font-family:inherit;cursor:pointer}input,select,textarea{font-family:inherit;font-size:14px}.layout{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--sidebar-bg);color:var(--sidebar-text);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;flex-shrink:0}.sidebar .brand{padding:20px 18px;font-size:17px;font-weight:700;color:#fff;display:flex;align-items:center;gap:10px;border-bottom:1px solid rgba(255,255,255,.08)}.sidebar .brand .logo{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,var(--primary),#7c3aed);display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px}.nav{padding:12px 10px;flex:1;overflow-y:auto}.nav-group{font-size:11px;color:#475569;margin:14px 8px 6px;letter-spacing:.5px}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;margin:2px 0;border-radius:8px;color:var(--sidebar-text);font-size:13.5px;cursor:pointer;transition:all .15s;border:none;background:transparent;width:100%;text-align:left;text-decoration:none;box-sizing:border-box}.nav-item:hover{background:#ffffff0f;color:#e2e8f0}.nav-item.active{background:var(--sidebar-active);color:#fff}.nav-item .icon{font-size:16px;width:20px;text-align:center}.sidebar .user-box{padding:14px 16px;border-top:1px solid rgba(255,255,255,.08);display:flex;align-items:center;justify-content:space-between}.sidebar .user-box .email{font-size:12px;color:#64748b;max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.logout-btn{background:#ffffff14;border:none;color:#cbd5e1;padding:5px 10px;border-radius:6px;font-size:12px}.logout-btn:hover{background:#dc26264d;color:#fecaca}.sidebar-usage{padding:10px 14px;border-top:1px solid rgba(255,255,255,.08)}.sidebar-usage .usage-title{font-size:11px;color:#475569;margin-bottom:8px;letter-spacing:.5px}.usage-row{margin-bottom:8px}.usage-label{display:flex;justify-content:space-between;font-size:11px;color:#94a3b8;margin-bottom:3px}.usage-bar{height:5px;border-radius:999px;background:#ffffff1a;overflow:hidden}.usage-fill{height:100%;border-radius:999px;background:var(--primary);transition:width .4s ease}.usage-fill.danger{background:#ef4444}.usage-tip{font-size:11px;color:#475569;cursor:help}.usage-warn{margin-top:8px;padding:7px 9px;border-radius:6px;background:#dc26261f;border:1px solid rgba(220,38,38,.4);color:#fca5a5;font-size:11px;line-height:1.5;cursor:pointer}.usage-warn:hover{background:#dc262638}.usage-warn .warn-icon{margin-right:4px}.main{flex:1;padding:24px 28px;min-width:0}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;gap:12px;flex-wrap:wrap}.page-header h1{font-size:22px;font-weight:700}.page-header .sub{color:var(--text-secondary);font-size:13px;margin-top:2px}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border);padding:20px;margin-bottom:16px}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:8px;border:1px solid var(--border);background:#fff;color:var(--text);font-size:13.5px;font-weight:500;transition:all 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var(--border);display:flex;justify-content:flex-end;gap:10px}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0f172a,#1e3a8a 55%,#2563eb);padding:20px}.login-card{background:#fff;border-radius:16px;width:100%;max-width:400px;padding:36px 32px;box-shadow:0 20px 60px #0000004d}.login-card .logo{width:52px;height:52px;border-radius:14px;margin:0 auto 16px;background:linear-gradient(135deg,var(--primary),#7c3aed);display:flex;align-items:center;justify-content:center;color:#fff;font-size:26px}.login-card h1{text-align:center;font-size:20px;margin-bottom:4px}.login-card .tip{text-align:center;color:var(--text-secondary);font-size:13px;margin-bottom:24px}.login-error{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c;padding:8px 12px;border-radius:8px;font-size:13px;margin-bottom:14px}.login-switch{text-align:center;margin-top:14px;font-size:13px;color:var(--text-secondary)}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-bottom:20px}.stat-card{background:var(--card);border-radius:var(--radius);padding:18px;border:1px solid var(--border);box-shadow:var(--shadow)}.stat-card .label{font-size:12.5px;color:var(--text-secondary)}.stat-card .value{font-size:28px;font-weight:700;margin-top:4px}.stat-card .value.red{color:var(--danger)}.stat-card .value.blue{color:var(--primary)}.stat-card .value.green{color:var(--success)}.stat-card .value.orange{color:var(--warning)}.todo-mini{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--border)}.todo-mini:last-child{border-bottom:none}.todo-mini .cb{width:16px;height:16px;flex-shrink:0}.todo-mini .t{flex:1}.todo-mini 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pre{background:#0f172a;color:#e2e8f0;padding:12px;border-radius:8px;overflow-x:auto;margin:8px 0}.note-preview pre code{background:none;color:inherit}.note-preview blockquote{border-left:3px solid var(--primary);padding-left:10px;color:var(--text-secondary);margin:6px 0}.tag{display:inline-block;background:var(--primary-light);color:var(--primary);padding:1px 8px;border-radius:999px;font-size:11.5px;margin:2px 3px 2px 0}.sync-msg{background:#f0fdf4;color:var(--success);border:1px solid #bbf7d0;padding:10px 12px;border-radius:8px;font-size:13px}.sync-box h4{font-size:14px}.backup-msg{background:#f0fdf4;color:#15803d;border:1px solid #bbf7d0;padding:12px 16px;border-radius:8px;font-size:14px;margin-top:16px}.backup-count{display:flex;justify-content:space-between;align-items:center;background:#f8f9fc;border:1px solid var(--border);border-radius:8px;padding:10px 14px;font-size:13px}.backup-count b{color:var(--primary);font-size:15px}.format-warn-title{color:var(--danger);font-size:15px;font-weight:700;margin-bottom:10px}.format-warn p,.format-warn ol{font-size:13.5px;line-height:1.8;margin-bottom:8px}.format-warn ol{padding-left:22px}.format-confirm-tip{margin-top:12px}.sql-block{background:#0f172a;color:#e2e8f0;padding:14px;border-radius:10px;font-size:12px;line-height:1.7;overflow-x:auto;margin:10px 0;white-space:pre;max-height:300px;overflow-y:auto}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:12px;color:var(--text-secondary)}.spinner{width:32px;height:32px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--primary);animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.file-item{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--border)}.file-item:last-child{border-bottom:none}.file-item .fname{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-item .fsize{color:var(--text-secondary);font-size:12px}.flex{display:flex;align-items:center;gap:8px}.flex-between{display:flex;align-items:center;justify-content:space-between}.mt-8{margin-top:8px}.mt-16{margin-top:16px}.muted{color:var(--text-secondary)}.text-sm{font-size:12.5px}@media (max-width: 768px){.layout{flex-direction:column}.sidebar{width:100%;height:auto;position:static}.nav{display:flex;overflow-x:auto;padding:8px}.nav-group{display:none}.nav-item{white-space:nowrap;width:auto}.main{padding:16px}.field-row,.field-row-3{grid-template-columns:1fr}}