:root{--bg-primary: #1a1a2e;--bg-secondary: #16213e;--bg-card: #1f2b47;--bg-hover: #253354;--text-primary: #e0e0e0;--text-secondary: #a0a0b8;--text-muted: #6c6c80;--accent: #4fc3f7;--accent-dim: #2a7aa8;--success: #66bb6a;--warning: #ffa726;--danger: #ef5350;--border: #2a3a5c;--shadow: rgba(0, 0, 0, .3);--radius: 8px;--radius-lg: 12px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh}#root{display:flex;min-height:100vh}a{color:var(--accent);text-decoration:none}button{cursor:pointer;font-family:inherit;border:none;outline:none}input,select,textarea{font-family:inherit;background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border);border-radius:var(--radius);padding:8px 12px;outline:none;transition:border-color .2s}input:focus,select:focus,textarea:focus{border-color:var(--accent)}.app-layout{display:flex;width:100%;min-height:100vh}.sidebar{width:200px;background:var(--bg-secondary);border-right:1px solid var(--border);padding:20px 0;display:flex;flex-direction:column;flex-shrink:0}.sidebar-brand{padding:0 20px 20px;font-size:18px;font-weight:700;color:var(--accent);border-bottom:1px solid var(--border);margin-bottom:10px}.sidebar nav{display:flex;flex-direction:column;gap:2px;padding:0 8px}.sidebar nav a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius);color:var(--text-secondary);transition:all .2s;font-size:14px}.sidebar nav a:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar nav a.active{background:var(--accent-dim);color:#fff}.main-content{flex:1;overflow-y:auto;padding:20px}.card{background:var(--bg-card);border-radius:var(--radius-lg);border:1px solid var(--border);padding:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 16px;border-radius:var(--radius);font-size:14px;font-weight:500;transition:all .2s}.btn-primary{background:var(--accent);color:#1a1a2e}.btn-primary:hover{background:#6dd0fa}.btn-success{background:var(--success);color:#1a1a2e}.btn-danger{background:var(--danger);color:#fff}.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border)}.btn-ghost:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-sm{padding:4px 10px;font-size:12px}.priority-badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:11px;font-weight:600;text-transform:uppercase}.priority-high{background:#ef535033;color:var(--danger)}.priority-medium{background:#ffa72633;color:var(--warning)}.priority-low{background:#66bb6a33;color:var(--success)}.status-badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:11px;font-weight:500}.status-pending{background:#a0a0b833;color:var(--text-secondary)}.status-in_progress{background:#4fc3f733;color:var(--accent)}.status-completed{background:#66bb6a33;color:var(--success)}.progress-bar{width:100%;height:8px;background:var(--bg-secondary);border-radius:4px;overflow:hidden}.progress-fill{height:100%;border-radius:4px;transition:width .3s}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;width:100%;background:var(--bg-primary)}.login-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px;width:340px;display:flex;flex-direction:column;align-items:center;gap:16px}.login-icon{margin-bottom:4px}.login-card h1{font-size:22px;font-weight:700;color:var(--text-primary)}.login-hint{color:var(--text-secondary);font-size:14px}.login-error{color:var(--danger);font-size:13px;background:#ef53501a;padding:6px 14px;border-radius:var(--radius);width:100%;text-align:center}.login-card input{width:100%;padding:10px 14px;font-size:15px;text-align:center}.login-card .btn{width:100%;padding:10px;font-size:15px}.sidebar-bottom{margin-top:auto;padding:12px 8px}.logout-btn{width:100%;font-size:12px;color:var(--text-muted)}@media (max-width: 768px){.sidebar{width:60px}.sidebar-brand{font-size:14px;padding:0 10px 15px;text-align:center}.sidebar nav a span{display:none}}