/* Define CSS custom properties for both themes */
:root {
    /* Light mode colors (default) */
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --card-bg: #f8f9fa;
    --card-text: #1a1a1a;
    --card-text-secondary: rgba(26, 26, 26, 0.7);
    --price-tag-bg: rgba(255, 255, 255, 0.9);
    --price-tag-text: #1a1a1a;
    --gradient-start: rgba(0, 0, 0, 0.6);
    --gradient-end: rgba(0, 0, 0, 0.2);
    --hover-overlay: rgba(1, 13, 70, 0.3);
    --price-tag-backdrop-filter: blur(8px)
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --text-color: #ffffff;
        --card-bg: #2a2a2a;
        --card-text: #ffffff;
        --card-text-secondary: rgba(255, 255, 255, 0.7);
        --price-tag-bg: rgba(0, 0, 0, 0.7);
        --price-tag-text: #ffffff;
        --gradient-start: rgba(0, 0, 0, 0.8);
        --gradient-end: rgba(0, 0, 0, 0.4);
        --hover-overlay: rgba(1, 13, 70, 0.4);
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    padding: 20px;
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    aspect-ratio: 1/1;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.card-image {
    position: relative;
    width: 100%;
    height: 100%;
}

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

.price-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--price-tag-bg);
    color: var(--price-tag-text);
    padding: 5px 10px;
    border-radius: 14px;
    font-size: 14px;
    font-weight: 500;
    z-index: 2;
    backdrop-filter: var(--price-tag-backdrop-filter);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, var(--gradient-start) 0%, var(--gradient-end) 30%);
    transition: 0.3s ease-out;
    z-index: 1;
}

.card:hover::before {
    background-color: var(--hover-overlay);
}

.card-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 15px;
    color: var(--card-text);
    z-index: 2;
    transform: translateY(0);
    transition: 0.3s ease-out;
}

.card:hover .card-content {
    transform: translateY(0);
}

.card:hover .card-content::before {
    opacity: 1;
    height: 200%;
}

.user-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.user-info h3 {
    font-size: 16px;
    font-weight: 500;
    color: var(--card-text);
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color 0.3s ease;
}

.verified {
    width: 15px;
    height: 13px;
    vertical-align: middle;
    margin-left: 2px;
}

.username {
    color: var(--card-text-secondary);
    font-size: 14px;
    transition: color 0.3s ease;
}

.description {
    font-size: 14px;
    color: var(--card-text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    max-height: 0;
    transition: 0.3s ease-out, color 0.3s ease;
    margin-top: 0;
}

.card:hover .description {
    max-height: 100px;
    margin-top: 8px;
}

/* Responsive adjustments */
@media (max-width: 1200px) {
    .grid-container {
        grid-template-columns: repeat(4, 1fr);
        gap: 12px;
        padding: 12px;
    }
}

@media (max-width: 768px) {
    body {
        padding: 8px;
    }

    .grid-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
        padding: 8px;
    }

    .price-tag {
        padding: 3px 8px;
        font-size: 12px;
    }

    .card-content {
        padding: 12px;
    }

    .user-info h3 {
        font-size: 14px;
    }

    .username, .description {
        font-size: 12px;
    }
}

/* Optional: Manual theme toggle classes for JavaScript control */
.light-theme {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --card-bg: #f8f9fa;
    --card-text: #ffffff;
    --card-text-secondary: rgba(255, 255, 255, 0.7);
    --price-tag-bg: rgba(255, 255, 255, 0.4);
    --price-tag-text: #1a1a1a;
    --gradient-start: rgba(0, 0, 0, 0.6);
    --gradient-end: rgba(0, 0, 0, 0.2);
    --hover-overlay: rgba(1, 13, 70, 0.3);
    --price-tag-backdrop-filter: blur(1px)
}

.dark-theme {
    --bg-color: #1a1a1a;
    --text-color: #ffffff;
    --card-bg: #2a2a2a;
    --card-text: #ffffff;
    --card-text-secondary: rgba(255, 255, 255, 0.7);
    --price-tag-bg: rgba(0, 0, 0, 0.7);
    --price-tag-text: #ffffff;
    --gradient-start: rgba(0, 0, 0, 0.8);
    --gradient-end: rgba(0, 0, 0, 0.4);
    --hover-overlay: rgba(1, 13, 70, 0.4);
    --price-tag-backdrop-filter: blur(8px);
}