:root{--primary-color: #007aff;--bg-color: #f4f7fe;--sidebar-bg: #ffffff;--text-color: #333;--card-bg: #ffffff;--border-radius: 12px;--box-shadow: 0 4px 6px rgba(0, 0, 0, .05)}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:var(--bg-color);color:var(--text-color)}.dashboard-layout{display:flex;height:100vh}.sidebar{width:250px;background-color:var(--sidebar-bg);color:#fff;display:flex;flex-direction:column;padding:20px;box-shadow:2px 0 10px #0000001a}.sidebar-header{margin-bottom:40px;text-align:center}.sidebar-logo{max-width:100%;max-height:60px;border-radius:8px}.sidebar-nav{flex:1;display:flex;flex-direction:column;gap:10px}.nav-item{display:flex;align-items:center;background:none;border:none;color:#fffc;padding:12px 15px;border-radius:8px;cursor:pointer;font-size:16px;transition:all .2s;text-align:left}.nav-item:hover,.nav-item.active{background-color:#fff3;color:#fff;font-weight:600}.nav-item .icon{margin-right:12px;font-size:18px;display:flex}.main-content{flex:1;padding:30px;overflow-y:auto}.content-area{animation:fadeIn .3s ease-in}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}h2{margin-top:0;margin-bottom:25px;font-weight:600;font-size:24px;color:#333}.card{background:var(--card-bg);border-radius:var(--border-radius);padding:25px;box-shadow:var(--box-shadow);margin-bottom:25px}.card-grid{display:flex;gap:25px;flex-wrap:wrap}.card-grid .card{flex:1;min-width:300px}.card.full-width{width:100%}.card.flex-grow{flex-grow:2}.form-group{margin-bottom:15px}.form-group label{display:block;margin-bottom:8px;font-weight:500;font-size:14px;color:#555}input[type=text],input[type=email],input[type=password],input[type=number],select{width:100%;padding:10px 12px;border:1px solid #ddd;border-radius:6px;font-size:14px;transition:border .2s}input:focus{border-color:var(--primary-color);outline:none}input[type=file]{padding:5px 0}.row{display:flex;gap:15px}button{cursor:pointer;border:none;font-size:14px;border-radius:6px;padding:10px 16px;transition:opacity .2s}button:hover{opacity:.9}.btn-primary{background-color:var(--primary-color);color:#fff;font-weight:600;width:100%}.btn-danger-sm{background-color:#dc3545;color:#fff;padding:5px 8px;font-size:12px;border-radius:4px}.btn-action{background-color:#e2e8f0;color:#4a5568;padding:6px 10px;margin-right:5px}.btn-action.danger{background-color:#fee2e2;color:#c53030}.btn-icon{background:none;padding:5px;font-size:16px}.btn-icon.success{color:#28a745}.btn-icon.danger{color:#dc3545}.modern-table{width:100%;border-collapse:collapse}.modern-table th{text-align:left;padding:12px 15px;border-bottom:2px solid #eee;color:#888;font-weight:600;font-size:13px;text-transform:uppercase}.modern-table td{padding:12px 15px;border-bottom:1px solid #f0f0f0;vertical-align:middle;font-size:14px}.modern-table tr:last-child td{border-bottom:none}.table-thumb{width:40px;height:40px;border-radius:6px;object-fit:cover}.badge{padding:4px 8px;border-radius:12px;font-size:12px;font-weight:600}.badge.success{background-color:#d1fae5;color:#065f46}.badge.danger{background-color:#fee2e2;color:#991b1b}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000}.modal{background:#fff;padding:30px;border-radius:12px;width:400px;box-shadow:0 10px 25px #0003}.modal h3{margin-top:0}.modal-actions{display:flex;gap:10px;margin-top:20px}.btn-secondary{background-color:#cbd5e0;color:#2d3748}