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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 50%, #2d2d2d 100%);
    color: #ffffff;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
    padding: 30px 20px;
    text-align: center;
    border-bottom: 3px solid transparent;
    border-image: linear-gradient(90deg, #ffffff 0%, #888888 50%, #ffffff 100%);
    border-image-slice: 1;
    margin-bottom: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.header h1 {
    font-size: 32px;
    font-weight: 300;
    letter-spacing: 8px;
    text-transform: uppercase;
    background: linear-gradient(135deg, #ffffff 0%, #cccccc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Tab Navigation */
.tab-nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
    color: #000000;
    border: 2px solid transparent;
    padding: 14px 35px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.4s ease;
    border-radius: 30px;
    font-weight: 600;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.tab-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.tab-btn:hover::before {
    left: 100%;
}

.tab-btn:hover {
    background: linear-gradient(135deg, #f8f8f8 0%, #ffffff 100%);
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.3);
}

.tab-btn.active {
    background: linear-gradient(135deg, #000000 0%, #2d2d2d 100%);
    color: #ffffff;
    border: 2px solid #ffffff;
    box-shadow: 0 6px 30px rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Room Grid */
.room-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 35px;
    margin-top: 30px;
}

.room-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8f8f8 100%);
    color: #000000;
    border-radius: 25px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
}

.room-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    z-index: 1;
}

.room-card:hover::before {
    opacity: 1;
}

.room-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

.room-image-container {
    position: relative;
    width: 100%;
    height: 260px;
    overflow: hidden;
}

.room-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.room-card:hover .room-image {
    transform: scale(1.1);
}

.room-badge {
    position: absolute;
    top: 20px;
    left: 20px;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.95) 0%, rgba(0, 0, 0, 0.85) 100%);
    color: #ffffff;
    padding: 10px 24px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    z-index: 2;
}

.room-number-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
    color: #000000;
    padding: 12px 24px;
    border-radius: 15px;
    font-size: 28px;
    font-weight: 800;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    border: 2px solid rgba(0, 0, 0, 0.1);
    z-index: 2;
}

.room-body {
    padding: 30px;
    position: relative;
    z-index: 2;
}

.room-price {
    font-size: 38px;
    font-weight: 800;
    background: linear-gradient(135deg, #000000 0%, #333333 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
    letter-spacing: -1px;
}

.room-price-label {
    font-size: 14px;
    color: #888888;
    margin-bottom: 18px;
    font-weight: 500;
}

.room-description {
    font-size: 15px;
    color: #444444;
    line-height: 1.7;
    margin-bottom: 18px;
    min-height: 50px;
    font-weight: 400;
}

.room-details {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 18px;
    padding-top: 18px;
    border-top: 2px solid #f0f0f0;
}

.room-detail-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: #555555;
    padding: 10px 15px;
    background: linear-gradient(135deg, #fafafa 0%, #f5f5f5 100%);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.room-detail-item:hover {
    background: linear-gradient(135deg, #f0f0f0 0%, #e8e8e8 100%);
    transform: translateX(5px);
}

.room-detail-icon {
    font-size: 20px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.room-status {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(135deg, #000000 0%, #2d2d2d 100%);
    color: #ffffff;
    font-size: 14px;
    border-radius: 30px;
    font-weight: 700;
    margin-top: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.room-status:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.room-status.available {
    background: linear-gradient(135deg, #000000 0%, #2d2d2d 100%);
}

.room-status.occupied {
    background: linear-gradient(135deg, #666666 0%, #888888 100%);
}

/* Room Detail Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.97);
    backdrop-filter: blur(10px);
    z-index: 1000;
    overflow-y: auto;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: linear-gradient(135deg, #ffffff 0%, #f8f8f8 100%);
    color: #000000;
    max-width: 650px;
    width: 90%;
    margin: 20px;
    border-radius: 25px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    background: linear-gradient(135deg, #000000 0%, #2d2d2d 100%);
    color: #ffffff;
    padding: 40px 30px;
    text-align: center;
    position: relative;
}

.modal-header .room-number {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: 3px;
    margin-bottom: 10px;
}

.modal-header .room-type {
    font-size: 16px;
    opacity: 0.9;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.close-btn {
    position: absolute;
    top: 20px;
    right: 25px;
    font-size: 32px;
    cursor: pointer;
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

.modal-body {
    padding: 45px;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #fafafa 0%, #f5f5f5 100%);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.detail-row:hover {
    background: linear-gradient(135deg, #f0f0f0 0%, #e8e8e8 100%);
    transform: translateX(5px);
}

.detail-label {
    font-weight: 700;
    color: #000000;
    font-size: 15px;
    letter-spacing: 0.5px;
}

.detail-value {
    color: #333333;
    text-align: right;
    font-size: 15px;
    font-weight: 500;
}

.booking-btn {
    width: 100%;
    background: linear-gradient(135deg, #000000 0%, #2d2d2d 100%);
    color: #ffffff;
    border: none;
    padding: 20px;
    font-size: 18px;
    cursor: pointer;
    margin-top: 30px;
    transition: all 0.4s ease;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    border-radius: 15px;
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.3);
}

.booking-btn:hover {
    background: linear-gradient(135deg, #2d2d2d 0%, #000000 100%);
    transform: translateY(-3px);
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.4);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: #ffffff;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
    border-radius: 25px;
    border: 2px dashed rgba(255, 255, 255, 0.2);
}

.empty-state h3 {
    font-size: 28px;
    margin-bottom: 15px;
    font-weight: 300;
    letter-spacing: 2px;
}

.empty-state p {
    font-size: 16px;
    color: #cccccc;
}

/* Responsive */
@media (max-width: 768px) {
    .room-grid {
        grid-template-columns: 1fr;
    }
    
    .header h1 {
        font-size: 22px;
    }
    
    .tab-btn {
        padding: 10px 20px;
        font-size: 14px;
    }
}