/* Enhanced Blog Index Styles - Đồng bộ với thiết kế mới */

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.blog-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.6s cubic-bezier(0.23, 1, 0.320, 1);
    position: relative;
    transform: translateY(20px);
    opacity: 0;
    animation: cardReveal 0.8s ease forwards;
}

.blog-card:nth-child(1) { animation-delay: 0.1s; }
.blog-card:nth-child(2) { animation-delay: 0.2s; }
.blog-card:nth-child(3) { animation-delay: 0.3s; }
.blog-card:nth-child(4) { animation-delay: 0.4s; }
.blog-card:nth-child(5) { animation-delay: 0.5s; }
.blog-card:nth-child(6) { animation-delay: 0.6s; }

@keyframes cardReveal {
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.blog-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 30px 80px rgba(255, 107, 157, 0.25);
}

.blog-card-image {
    position: relative;
    height: 250px;
    overflow: hidden;
    background: linear-gradient(135deg, #FF6B9D 0%, #4ECDC4 50%, #FFD700 100%);
    background-size: 400% 400%;
    animation: gradientShift 4s ease infinite;
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-card-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.15) 0%, transparent 50%);
    animation: shimmerOverlay 3s ease-in-out infinite;
}

.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.blog-card-content {
    padding: 2rem;
}

.blog-card-category {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.blog-card-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 1rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-excerpt {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 1.5rem;
}

.blog-card-stats {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.blog-card-stats span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.blog-card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.blog-card-link:hover {
    color: var(--secondary-color);
    transform: translateX(5px);
}

/* Category-specific colors */
.blog-card.category-study .blog-card-image {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.blog-card.category-tips .blog-card-image {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
}

.blog-card.category-review .blog-card-image {
    background: linear-gradient(135deg, #89f7fe 0%, #66a6ff 100%);
}

.blog-card.category-diy .blog-card-image {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
}

/* Blog filters */
.blog-filters {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: 0.8rem 1.5rem;
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 107, 157, 0.3);
}

/* Search box */
.blog-search {
    max-width: 500px;
    margin: 2rem auto;
    position: relative;
}

.blog-search input {
    width: 100%;
    padding: 1rem 1.5rem 1rem 3rem;
    border: 2px solid rgba(255, 107, 157, 0.2);
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

.blog-search input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 157, 0.1);
}

.blog-search .search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
    font-size: 1.2rem;
}

/* Loading states for images */
.blog-card-image.loading {
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-card-image .loading-content {
    text-align: center;
    color: white;
    z-index: 2;
    position: relative;
}

.blog-card-image .loading-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    animation: iconFloat 2s ease-in-out infinite;
}

.blog-card-image .loading-title {
    font-size: 1.1rem;
    font-weight: 600;
    opacity: 0.9;
}

@keyframes iconFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes shimmerOverlay {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Mobile optimizations */
@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin: 2rem 0;
    }
    
    .blog-card-image {
        height: 200px;
    }
    
    .blog-card-content {
        padding: 1.5rem;
    }
    
    .blog-card-title {
        font-size: 1.2rem;
    }
    
    .blog-filters {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .blog-card {
        border: 2px solid #333;
    }
    
    .blog-card-image {
        background: #333;
        color: white;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .blog-card,
    .blog-card-image,
    .blog-card-image img {
        animation: none !important;
        transition: none !important;
    }
}