:root{--bg-color: #f8f9fa;--card-bg: #ffffff;--text-color: #212529;--accent-color: #4a90e2;--accent-hover: #357abd;--border-color: #dee2e6;--danger-color: #e63946;--success-color: #2a9d8f;--warning-color: #f4a261}*{margin:0;padding:0;box-sizing:border-box}body{background-color:var(--bg-color);color:var(--text-color);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6}header{background-color:var(--card-bg);padding:1rem 2rem;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}h1,h2,h3{color:var(--text-color)}button{background-color:var(--accent-color);color:#fff;border:none;padding:.5rem 1rem;border-radius:6px;cursor:pointer;font-size:.9rem;transition:background-color .2s ease-in-out}button:hover{background-color:var(--accent-hover)}button.danger{background-color:var(--danger-color)}button.success{background-color:var(--success-color)}button.warning{background-color:var(--warning-color)}.container{max-width:1200px;margin:2rem auto;padding:1rem}.card{background-color:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;padding:1rem;margin-bottom:1rem;box-shadow:0 2px 5px #0000000d}input,select,textarea{width:100%;padding:.5rem;margin:.5rem 0;border:1px solid var(--border-color);border-radius:4px}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent-color);box-shadow:0 0 0 2px #4a90e233}.table{width:100%;border-collapse:collapse}.table th,.table td{border:1px solid var(--border-color);padding:.75rem;text-align:left}.table th{background-color:#f1f3f5}.icon-btn{background:none;border:none;padding:.3rem;cursor:pointer}.icon-btn:hover{background-color:#0000000d;border-radius:4px}.alert{padding:.75rem 1rem;border-radius:4px;margin-bottom:1rem}.alert.success{background-color:#2a9d8f1a;color:var(--success-color)}.alert.danger{background-color:#e639461a;color:var(--danger-color)}.alert.warning{background-color:#f4a2611a;color:var(--warning-color)}body{font-family:Arial,sans-serif;margin:0;padding:0}