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


/* Filter Bar */
.filter-bar {
    max-width: 1200px;
    margin: 0 auto var(--spacing-xl);
    padding: 0 var(--spacing-lg);
}

.filter-container {
    background: linear-gradient(135deg, var(--secondary) 0%,  var(--primary)100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    align-items: center;
}

.filter-label {
    font-weight: 600;
    color: white;
}

.filter-btn {
    background: var(--gray-100);
    border: 2px solid transparent;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-700);
    transition: all var(--transition-base);
}

.filter-btn:hover {
    background: var(--primary-light);
    border-color: var(--primary);
}

.filter-btn.active {
    background: var(--secondary-light);
    color: white;
    border-color: var(--secondary-light);
}

/* Posts Grid */
.posts-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.post-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    animation: fadeIn 0.6s ease;
    display: flex;
    flex-direction: column;
}

.post-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.post-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--gray-200) 0%, var(--gray-100) 100%);
}

.post-content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.post-type-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
    width: fit-content;
}

.badge-article {
    background: #e3f2fd;
    color: #1976d2;
}

.badge-research {
    background: #f3e5f5;
    color: #7b1fa2;
}

.badge-analysis {
    background: #fff3e0;
    color: #f57c00;
}

.badge-report {
    background: #e8f5e9;
    color: #388e3c;
}

.post-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.post-subtitle {
    font-size: 1rem;
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

.post-excerpt {
    font-size: 0.9rem;
    color: var(--gray-700);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.post-excerpt p {
    margin-bottom: var(--spacing-sm);
}

.post-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--gray-200);
}

.post-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--gray-700);
}

.author-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--primary);
}

.read-more {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all var(--transition-base);
}

.read-more:hover {
    gap: 8px;
}

/* Loading State */
.loading-container {
    text-align: center;
    padding: var(--spacing-xl);
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--spacing-md);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    max-width: 500px;
    margin: 0 auto;
}

.empty-state h3 {
    color: var(--secondary);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.empty-state p {
    color: var(--gray-700);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 1.8rem;
    }

    .posts-grid {
        grid-template-columns: 1fr;
    }

    .filter-container {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-btn {
        text-align: center;
    }
}