* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Poppins', sans-serif;
            background-color: #cbeaed;
            color: #2D2D2D; 
            line-height: 1.6;
        }

        .trencung{
            text-align: center; 
            text-transform: uppercase;
            background: url(/image/anhkhachsan.webp);
            background-size: 100% auto;
        }

        .noidung{
            color: #E63946; 
            font-size: 2.8em; 
            font-weight: 700; 
            text-align: center; 
            text-transform: uppercase;
            text-shadow: 2px 3px 5px rgb(120, 120, 225);
        }

        .slogan{
            font-size: 2rem;
            color: #FFF;
            font-weight: bold;
            text-shadow: 2px 3px 5px rgb(72 255 0);
        }

        .language a {
            color: #F1C40F; /* Sunflower Yellow */
            font-size: 0.9em;
        }

        /* Content Section */
        .content {
            max-width: 100%;
            padding: 20px 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
        }

        .main-content {
            flex: 3;
            min-width: 300px;
        }


        .summary {
            color: #1D3557; /* Midnight Blue */
            font-size: 1em;
            text-align: center;
            margin-bottom: 20px;
        }

        .search-bar {
            width: 100%;
            padding: 10px;
            margin-bottom: 20px;
            border: 1px solid #A8DADC; /* Soft Cyan */
            border-radius: 5px;
            font-family: 'Poppins', sans-serif;
            font-size: 1em;
        }

        /* Hotel Cards */
        .hotel-card {
            background: linear-gradient(145deg, #FFFFFF, #F9F9F9);
            border: 1px solid #A8DADC; /* Soft Cyan */
            border-radius: 12px;
            padding: 20px;
            margin-bottom: 20px;
            display: flex;
            gap: 20px;
            align-items: center;
            box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
        }

        .hotel-card:hover {
            transform: translateY(-5px);
        }

        .hotel-card img {
            width: 24%;
            border-radius: 8px;
            object-fit: cover;
        }

        .hotel-card h3 {
            color: #1D3557; /* Midnight Blue */
            font-size: 1.5em;
            margin-bottom: 5px;
        }

        .hotel-card .location {
            color: #666666;
            font-size: 0.9em;
            margin-bottom: 5px;
        }

        .hotel-card .stars {
            color: #F1C40F; /* Sunflower Yellow */
            font-size: 0.9em;
            margin-bottom: 5px;
        }

        .hotel-card .price {
            font-size: 0.9em;
            color: #E63946; /* Vermilion Red */
            font-weight: 600;
            margin-bottom: 5px;
        }

        .hotel-card .amenities {
            font-size: 0.9em;
            color: #2D2D2D;
            margin-bottom: 10px;
        }

        .hotel-card .compare-checkbox {
            margin-left: auto;
            display: flex;
            align-items: center;
        }

        .hotel-card .compare-checkbox input[type="checkbox"] {
            margin-right: 5px;
        }

        .hotel-card .compare-checkbox label {
            color: #1D3557;
            font-size: 0.9em;
            cursor: pointer;
        }

        .hotel-card a.book-now {
            display: inline-block;
            background-color: #A3D5FF; 
            color: #2D2D2D;
            padding: 8px 15px;
            border-radius: 5px;
            text-decoration: none;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s ease, transform 0.2s ease;
            margin-left: 10px;
        }

        .hotel-card a.book-now:hover {
            background-color: #E07A5F; /* Terracotta */
            color: #FFFFFF;
            transform: scale(1.05);
        }

        /* Tabs */
        .tabs {
            display: flex;
            margin-bottom: 20px;
        }

        .tab-khoi {
            padding: 10px 20px;
            background-color: #A8DADC; /* Soft Cyan */
            border: none;
            cursor: pointer;
            font-family: 'Poppins', sans-serif;
            font-weight: 600;
            transition: background-color 0.3s ease;
        }

        .tab-khoi:hover, .tab-khoi.active {
            background-color: #E07A5F;
            color: #FFFFFF;
        }

        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            justify-content: center;
            align-items: center;
            z-index: 1000;
        }

        .modal-content {
            background-color: #FFFFFF;
            border-radius: 12px;
            padding: 20px;
            max-width: 90%;
            width: 800px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
            position: relative;
            max-height: 80vh;
            overflow-y: auto;
        }

        .modal-content h3 {
            color: #E63946; /* Vermilion Red */
            font-size: 1.8em;
            margin-bottom: 20px;
            text-align: center;
        }

        .modal-content label {
            display: block;
            margin-bottom: 10px;
            color: #1D3557; /* Midnight Blue */
            font-weight: 600;
        }

        .modal-content select,
        .modal-content input[type="date"] {
            width: 100%;
            padding: 10px;
            margin-bottom: 15px;
            border: 1px solid #A8DADC; /* Soft Cyan */
            border-radius: 5px;
            font-family: 'Poppins', sans-serif;
        }

        .modal-content .total-cost {
            font-size: 1em;
            color: #E63946; /* Vermilion Red */
            font-weight: 600;
            margin-bottom: 15px;
            text-align: center;
        }

        .modal-content input[type="submit"] {
            width: 100%;
            background-color: #F1C40F; /* Sunflower Yellow */
            color: #2D2D2D;
            border: none;
            padding: 10px;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            transition: background-color 0.3s ease, transform 0.2s ease;
        }

        .modal-content input[type="submit"]:hover {
            background-color: #E07A5F; /* Terracotta */
            transform: scale(1.05);
        }

        .modal-content input[type="submit"]:disabled {
            background-color: #cccccc;
            cursor: not-allowed;
            transform: none;
        }

        .modal-content .close {
            position: absolute;
            top: 10px;
            right: 15px;
            font-size: 1.5em;
            color: #1D3557;
            cursor: pointer;
            transition: color 0.3s ease;
        }

        .modal-content .close:hover {
            color: #E63946;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }

        .comparison-table th,
        .comparison-table td {
            padding: 10px;
            border: 1px solid #A8DADC;
            text-align: center;
            font-size: 0.9em;
        }

        .comparison-table th {
            background-color: #E07A5F; /* Terracotta */
            color: #FFFFFF;
            font-weight: 600;
        }

        .comparison-table td {
            background-color: #F9F9F9;
        }

        .comparison-table .highlight {
            background-color: #F1C40F; /* Sunflower Yellow */
            font-weight: 600;
        }

        /* Sidebar */
        .sidebar {
            flex: 1;
            min-width: 250px;
            padding: 20px;
            background-color: #FFFFFF;
            border-radius: 12px;
            box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
        }

        .sidebar h3 {
            color: #E63946; /* Vermilion Red */
            font-size: 1.7em;
            margin-bottom: 15px;
            font-weight: 600;
        }

        .sidebar select, .sidebar input[type="range"], .sidebar input[type="submit"] {
            width: 100%;
            padding: 10px;
            margin-bottom: 10px;
            border: 1px solid #A8DADC; /* Soft Cyan */
            border-radius: 5px;
            font-family: 'Poppins', sans-serif;
        }

        .sidebar .price-range-value {
            text-align: center;
            color: #1D3557;
            margin-bottom: 10px;
        }

        .sidebar input[type="submit"] {
            background-color: #A3D5FF;
            color: #2D2D2D;
            border: none;
            cursor: pointer;
            font-weight: 600;
            transition: background-color 0.3s ease, transform 0.2s ease;
        }

        .sidebar input[type="submit"]:hover {
            background-color: #E07A5F; 
            transform: scale(1.05);
        }

        /* Footer */
        footer {
            background-color: #1D3557; /* Midnight Blue */
            color: #FFFFFF;
            text-align: center;
            padding: 20px;
            box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.2);
        }

        footer h3 {
            color: #E63946; /* Vermilion Red */
            margin-bottom: 10px;
        }

        footer a {
            color: #F1C40F; /* Sunflower Yellow */
            text-decoration: none;
            margin: 0 10px;
            transition: color 0.3s ease;
        }

        footer a:hover {
            color: #E07A5F; /* Terracotta */
        }

        /* Back to Top */
        .back-to-top {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background-color: #F1C40F; /* Sunflower Yellow */
            color: #2D2D2D;
            padding: 10px 15px;
            border-radius: 50%;
            text-decoration: none;
            font-weight: 600;
            transition: background-color 0.3s ease;
        }

        .back-to-top:hover {
            background-color: #E07A5F; /* Terracotta */
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .main-content{
                order:2;
            }
            .content {
                flex-direction: column;
            }

            .hotel-card {
                flex-direction: column;
                text-align: center;
            }

            .hotel-card img {
                width: 100%;
            }

            .sidebar {
                max-width: 100%;
            }

            .modal-content {
                width: 95%;
            }

            .tabs {
                flex-direction: column;
            }

            .tab-khoi {
                width: 100%;
                margin-bottom: 10px;
            }

            .comparison-table th,
            .comparison-table td {
                font-size: 0.8em;
                padding: 5px;
            }
        }