*{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,sans-serif;background:#f4f6f9;color:#333}.container{max-width:900px;margin:0 auto;padding:20px}header{background:#1a73e8;color:#fff;padding:16px 20px;border-radius:8px;margin-bottom:24px}header h1{font-size:22px;margin-bottom:12px}nav{display:flex;gap:8px}nav button{padding:6px 16px;border:2px solid rgba(255,255,255,.6);background:transparent;color:#fff;border-radius:4px;cursor:pointer;font-size:14px}nav button.active,nav button:hover{background:#fff;color:#1a73e8}main{background:#fff;border-radius:8px;padding:24px;box-shadow:0 1px 4px #0000001a}h2{margin-bottom:20px;font-size:20px;color:#1a73e8}h3{margin-bottom:12px;font-size:16px}label{display:block;font-size:14px;font-weight:600;margin-bottom:4px;color:#555}input[type=text],input[type=file]{width:100%;padding:8px 12px;border:1px solid #ddd;border-radius:4px;font-size:14px;margin-bottom:16px}button{padding:10px 20px;background:#1a73e8;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:14px}button:hover{background:#1557b0}button:disabled{background:#aaa;cursor:not-allowed}.status-box{margin-top:16px;padding:12px 16px;background:#f0f4ff;border-left:4px solid #1a73e8;border-radius:4px;font-size:14px}.status-box.error{background:#fff0f0;border-color:#e53935}.status-box.success{background:#f0fff4;border-color:#43a047}table{width:100%;border-collapse:collapse;font-size:13px;margin-top:8px}th{background:#f5f7fa;padding:8px;text-align:left;border:1px solid #e0e0e0}td{padding:6px 8px;border:1px solid #e0e0e0}tr:hover td{background:#f9f9f9}.stats{display:flex;gap:16px;margin-bottom:20px}.stat-card{flex:1;padding:14px;border-radius:8px;text-align:center;font-weight:600}.stat-card.total{background:#e3f2fd;color:#1565c0}.stat-card.pending{background:#fff8e1;color:#f57f17}.stat-card.completed{background:#e8f5e9;color:#2e7d32}.stat-card .num{font-size:28px;display:block}.badge{display:inline-block;padding:2px 8px;border-radius:12px;font-size:12px;font-weight:600}.badge.pending{background:#fff3cd;color:#856404}.badge.completed{background:#d4edda;color:#155724}