.container{max-width:800px;margin:0 auto;padding:20px;font-family:Arial,sans-serif}h1{color:#00a8ff;text-align:center}.house-list{display:grid;gap:20px}.house-card{border:1px solid #ddd;padding:20px;border-radius:10px;box-shadow:0 4px 6px #0000001a;background-color:#fff}.house-card h2{margin-top:0;color:#333}button{background-color:#00a8ff;color:#fff;border:none;padding:10px 20px;border-radius:5px;cursor:pointer;font-weight:700}button:hover{background-color:#008ecc}.back-btn{display:inline-block;margin-bottom:20px;color:#555;text-decoration:none;font-weight:700}.room-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px}.room-card{border:1px solid #ddd;padding:15px;border-radius:8px;background:#fff;text-align:center;position:relative}.room-card.available{border-top:5px solid #2ecc71}.room-card.occupied{border-top:5px solid #e74c3c}.price{color:#e67e22;font-weight:700;font-size:1.2em}.status-badge{display:inline-block;padding:5px 10px;border-radius:15px;font-size:.8em;color:#fff;margin-bottom:10px}.room-card.available .status-badge{background-color:#2ecc71}.room-card.occupied .status-badge{background-color:#e74c3c}.actions{display:flex;justify-content:space-between;margin-top:10px}.btn-edit{background-color:#95a5a6;font-size:.8em}.btn-bill{background-color:#f1c40f;color:#333;font-size:.8em}.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000}.modal-content{background:#fff;padding:30px;border-radius:10px;width:400px;text-align:center;box-shadow:0 5px 15px #0000004d}.form-group{margin:20px 0;text-align:left}.form-group label{display:block;margin-bottom:5px;font-weight:700}.form-group input{width:100%;padding:10px;border:1px solid #ddd;border-radius:5px;font-size:16px;box-sizing:border-box}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}.btn-cancel{background-color:#ccc;color:#333}.btn-confirm{background-color:#2ecc71}.qr-result img{max-width:100%;border:2px solid #2ecc71;border-radius:8px;margin-top:10px}.stats-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:30px}.stat-card{display:flex;align-items:center;padding:20px;border-radius:12px;color:#fff;box-shadow:0 4px 6px #0000001a;transition:transform .2s}.stat-card:hover{transform:translateY(-5px)}.stat-icon{font-size:2.5em;margin-right:15px;opacity:.8}.stat-info h3{margin:0;font-size:.9em;opacity:.9;font-weight:400}.stat-info p{margin:5px 0 0;font-size:1.8em;font-weight:700}.stat-card.blue{background:linear-gradient(135deg,#3498db,#2980b9)}.stat-card.green{background:linear-gradient(135deg,#2ecc71,#27ae60)}.stat-card.orange{background:linear-gradient(135deg,#f1c40f,#f39c12)}.stat-card.purple{background:linear-gradient(135deg,#9b59b6,#8e44ad)}.input-group-row{display:flex;gap:15px;margin-bottom:5px}.input-half{flex:1}.input-half label{display:block;font-size:.85em;color:#666;margin-bottom:3px}.input-half input{width:100%;padding:8px;border:1px solid #ddd;border-radius:4px}.calc-detail{font-size:.85em;color:#555;text-align:right;margin-bottom:15px;font-style:italic}.text-blue{color:#0097e6;font-weight:700}.calc-row{display:flex;justify-content:space-between;padding:5px 0;font-size:1.1em}.total-row{background-color:#f1f2f6;padding:15px;border-radius:8px;display:flex;justify-content:space-between;align-items:center;margin-top:15px;margin-bottom:20px;font-weight:700}.total-price{font-size:1.5em;color:#e74c3c}.invoice-table{width:100%;border-collapse:collapse;margin-top:20px;background:#fff;box-shadow:0 2px 8px #0000001a}.invoice-table th,.invoice-table td{padding:12px 15px;text-align:left;border-bottom:1px solid #ddd}.invoice-table th{background-color:#f8f9fa;color:#333;font-weight:700}.invoice-table tr:hover{background-color:#f1f1f1}.badge{padding:5px 10px;border-radius:20px;font-size:.85em;color:#fff}.badge.success{background-color:#2ecc71}.badge.warning{background-color:#f39c12}.btn-confirm-small{background-color:#3498db;color:#fff;border:none;padding:5px 10px;border-radius:4px;cursor:pointer;font-size:.9em}.btn-confirm-small:hover{background-color:#2980b9}.login-container{height:100vh;display:flex;justify-content:center;align-items:center;background:linear-gradient(135deg,#74b9ff,#a29bfe)}.login-box{background:#fff;padding:40px;border-radius:15px;box-shadow:0 10px 25px #0003;width:350px;text-align:center}.login-box h2{color:#2d3436;margin-bottom:5px}.subtitle{color:#636e72;margin-bottom:25px;font-size:.9em}.btn-login{width:100%;padding:12px;background-color:#0984e3;color:#fff;border:none;border-radius:6px;font-size:16px;cursor:pointer;margin-top:10px;transition:background .3s}.btn-login:hover{background-color:#74b9ff}.switch-mode{margin-top:20px;font-size:.9em}.switch-mode span{color:#0984e3;font-weight:700;cursor:pointer}