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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f8fafc;
    color: #1e293b;
    line-height: 1.6;
}

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

/* Header */
.header {
    text-align: center;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 0.5rem;
}

.header p {
    font-size: 1.125rem;
    color: #64748b;
}

/* Filter Section */
.filter-section {
    margin-bottom: 2rem;
}

.filter-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
}

.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.filter-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #0f172a;
}

.clear-btn {
    background: #ef4444;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.clear-btn:hover {
    background: #dc2626;
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.filter-group {
    display: flex;
    flex-direction: column;
}

.filter-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: #374151;
    margin-bottom: 0.5rem;
}

.filter-group select {
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    background: white;
    font-size: 0.875rem;
    cursor: pointer;
    transition: border-color 0.2s;
}

.filter-group select:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Price Range Slider */
.price-range {
    grid-column: span 2;
}

.price-slider-container {
    position: relative;
    height: 40px;
}

.price-slider-container input[type="range"] {
    margin-top: 20px;
    position: absolute;
    width: 100%;
    height: 3px;
   background-color: black;
    outline: none;
    -webkit-appearance: none;
    pointer-events: none;
}

.price-slider-container input[type="range"]::-webkit-slider-track {
    height: 6px;
    background: #00040a;
    border-radius: 3px;
}

.price-slider-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 25px;
    height: 25px;
    background: #3b82f6;
    border-radius: 50%;
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    pointer-events: auto;
}

.price-slider-container input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: #3b82f6;
    border-radius: 50%;
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    pointer-events: auto;
}

.results-count {
    text-align: center;
    color: #64748b;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Phone Grid */
.phone-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* Phone Card */
.phone-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}

.phone-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.card-image-container {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sold-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: #ef4444;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.card-actions {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    gap: 8px;
}

.wishlist-btn, .share-btn-card {
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    backdrop-filter: blur(4px);
}

.wishlist-btn:hover, .share-btn-card:hover {
    background: white;
    transform: scale(1.1);
}

.wishlist-btn.active {
    background: #ef4444;
    color: white;
}

.card-content {
    padding: 1rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.brand-model h3 {
    font-size: 1rem;
    font-weight: 600;
    color: #0f172a;
    margin-bottom: 0.25rem;
}

.brand-model p {
    font-size: 0.875rem;
    color: #64748b;
}

.price {
    font-size: 1.25rem;
    font-weight: 700;
    color: #059669;
}

.rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.stars {
    display: flex;
    gap: 2px;
}

.star {
    color: #fbbf24;
    font-size: 0.875rem;
}

.star.empty {
    color: #d1d5db;
}

.review-count {
    font-size: 0.75rem;
    color: #6b7280;
}

.condition-date {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.condition {
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.condition.new { background: #dcfce7; color: #166534; }
.condition.like-new { background: #dbeafe; color: #1e40af; }
.condition.used { background: #fef3c7; color: #92400e; }
.condition.refurbished { background: #f3e8ff; color: #7c3aed; }

.upload-date {
    font-size: 0.75rem;
    color: #6b7280;
}

.features-preview {
    font-size: 0.75rem;
    color: #6b7280;
    line-height: 1.4;
}

/* Loading */
.loading {
    text-align: center;
    padding: 2rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #e2e8f0;
    border-top: 4px solid #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    animation: fadeIn 0.3s ease;
}

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

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

.modal-content {
    background: white;
    border-radius: 12px;
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: scale(0.9) translateY(20px); opacity: 0; }
    to { transform: scale(1) translateY(0); opacity: 1; }
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    z-index: 10;
    transition: background-color 0.2s;
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.7);
}

.modal-body {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    padding: 2rem;
}

.modal-image-section {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-image-container {
    position: relative;
    max-width: 100%;
    max-height: 500px;
}

.modal-image-container img {
    max-width: 100%;
    max-height: 500px;
    object-fit: contain;
    border-radius: 8px;
}

.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
    z-index: 5;
}

.nav-btn:hover {
    background: rgba(0, 0, 0, 0.7);
}

.prev-btn {
    left: -60px;
}

.next-btn {
    right: -60px;
}

.modal-details {
    padding: 1rem 0;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #0f172a;
}

.modal-info .price-rating {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.modal-info .price {
    font-size: 1.5rem;
}

.condition-date {
    margin-bottom: 1.5rem;
}

.features h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #374151;
}

.features ul {
    list-style: none;
    padding: 0;
}

.features li {
    padding: 0.25rem 0;
    color: #6b7280;
    font-size: 0.875rem;
}

.features li:before {
    content: "✓ ";
    color: #059669;
    font-weight: bold;
}

.modal-share {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e5e7eb;
}

.modal-share h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: #374151;
}

.share-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.share-btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.share-btn:hover {
    transform: translateY(-1px);
}

.share-btn.whatsapp {
    background: #25d366;
    color: white;
}

.share-btn.facebook {
    background: #1877f2;
    color: white;
}

.share-btn.instagram {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .filter-grid {
        grid-template-columns: 1fr;
    }
    
    .price-range {
        grid-column: span 1;
    }
    
    .phone-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1rem;
    }
    
    .modal-body {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 1rem;
    }
    
    .nav-btn {
        position: relative;
        left: auto !important;
        right: auto !important;
        margin: 0 0.5rem;
    }
    
    .modal-image-section {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-buttons {
        display: flex;
        justify-content: center;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .phone-grid {
        grid-template-columns: 1fr;
    }
    
    .share-buttons {
        flex-direction: column;
    }
    
    .share-btn {
        justify-content: center;
    }
}