/* ================================================
   RESOURCES PAGE STYLES
   Following design system & 8-point grid
   ================================================ */

/* ===== Resources Hero ===== */
.resources-hero {
    padding: calc(var(--space-96) + 60px) 0 var(--space-64);
    background: linear-gradient(135deg,
        var(--color-primary) 0%,
        var(--color-white) 100%);
    text-align: center;
    border-bottom: 1px solid var(--color-gray-light);
}

.resources-hero__title {
    font-size: var(--text-5xl);
    margin-bottom: var(--space-24);
    color: var(--color-secondary);
}

.resources-hero__subtitle {
    font-size: var(--text-lg);
    color: var(--color-gray);
    max-width: 65ch;
    margin: 0 auto;
}

/* ===== Filter Bar ===== */
.filter-bar {
    background-color: var(--color-white);
    padding: var(--space-32) 0;
    border-bottom: 1px solid var(--color-gray-light);
    position: sticky;
    top: 60px;
    z-index: 100;
}

.filter-bar__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-32);
}

.filter-bar__categories {
    display: flex;
    gap: var(--space-16);
    flex-wrap: wrap;
    flex: 1;
}

.filter-btn {
    padding: var(--space-8) var(--space-16);
    background-color: transparent;
    color: var(--color-gray);
    border: 2px solid var(--color-gray-light);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 600;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

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

.filter-bar__search {
    width: 280px;
}

.search-input {
    width: 100%;
    padding: var(--space-8) var(--space-16);
    font-size: var(--text-base);
    border: 2px solid var(--color-gray-light);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.search-input::placeholder {
    color: var(--color-gray);
}

/* ===== Articles Grid ===== */
.resources-grid {
    padding: var(--space-64) 0 var(--space-96);
    background-color: var(--color-primary);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--space-32);
}

/* ===== Article Card ===== */
.article-card {
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

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

.article-card__icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(0, 174, 239, 0.1) 0%, rgba(0, 174, 239, 0.05) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: var(--space-32) var(--space-32) 0;
    color: var(--color-accent);
    transition: all var(--transition-base);
}

.article-card:hover .article-card__icon {
    background: linear-gradient(135deg, rgba(0, 174, 239, 0.15) 0%, rgba(0, 174, 239, 0.1) 100%);
    transform: scale(1.05);
}

.article-card__content {
    padding: var(--space-24) var(--space-32) var(--space-32);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.article-card__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-16);
}

.article-card__category {
    display: inline-block;
    padding: var(--space-8) var(--space-16);
    background-color: var(--color-accent);
    color: var(--color-white);
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    border-radius: var(--radius-sm);
}

.article-card__date {
    font-size: var(--text-sm);
    color: var(--color-gray);
}

.article-card__title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-16);
    line-height: var(--leading-display);
}

.article-card__title a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.article-card__title a:hover {
    color: var(--color-accent);
}

.article-card__excerpt {
    flex: 1;
    margin-bottom: var(--space-24);
    color: var(--color-gray);
    line-height: var(--leading-relaxed);
}

.article-card__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-16);
    border-top: 1px solid var(--color-gray-light);
}

.article-card__read-time {
    font-size: var(--text-sm);
    color: var(--color-gray);
}

.article-card__link {
    font-weight: 600;
    color: var(--color-accent);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.article-card__link:hover {
    color: var(--color-secondary);
    transform: translateX(4px);
}

/* ===== Category-specific colors ===== */
.article-card[data-category="SEO"] .article-card__category {
    background-color: #10B981;
}

.article-card[data-category="Web Performance"] .article-card__category {
    background-color: #F59E0B;
}

.article-card[data-category="E-Commerce"] .article-card__category {
    background-color: #8B5CF6;
}

.article-card[data-category="Platform Comparison"] .article-card__category {
    background-color: #EF4444;
}

.article-card[data-category="PPC Strategy"] .article-card__category {
    background-color: #3B82F6;
}

.article-card[data-category="Web Development"] .article-card__category {
    background-color: #14B8A6;
}

.article-card[data-category="Security"] .article-card__category {
    background-color: #DC2626;
}

.article-card[data-category="Mobile Development"] .article-card__category {
    background-color: #7C3AED;
}

.article-card[data-category="Web Infrastructure"] .article-card__category {
    background-color: #059669;
}

.article-card[data-category="Nonprofit Strategy"] .article-card__category {
    background-color: #EC4899;
}

/* ===== Hidden/Visible States ===== */
.article-card--hidden {
    display: none;
}

.no-results {
    text-align: center;
    padding: var(--space-64) 0;
    font-size: var(--text-lg);
    color: var(--color-gray);
}

/* ===== Resources CTA Section ===== */
.resources-cta {
    background: linear-gradient(135deg,
        var(--color-secondary) 0%,
        #2a3544 100%);
    color: var(--color-white);
    padding: var(--space-96) 0;
    text-align: center;
}

.resources-cta__content {
    max-width: 600px;
    margin: 0 auto;
}

.resources-cta .section-title {
    color: var(--color-white);
    margin-bottom: var(--space-24);
}

.resources-cta__text {
    font-size: var(--text-lg);
    margin-bottom: var(--space-32);
    opacity: 0.9;
}

/* ===== Animation for filtered items ===== */
@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.article-card--visible {
    animation: fadeInScale 300ms ease;
}

/* ===== Featured/Sticky Post (Optional) ===== */
.article-card--featured {
    grid-column: span 2;
    background: linear-gradient(135deg,
        var(--color-white) 0%,
        #F3F4F6 100%);
}

.article-card--featured .article-card__content {
    padding: var(--space-48);
}

.article-card--featured .article-card__title {
    font-size: var(--text-3xl);
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .filter-bar__content {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-bar__search {
        width: 100%;
    }

    .articles-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }

    .article-card--featured {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .resources-hero {
        padding: calc(var(--space-64) + 60px) 0 var(--space-48);
    }

    .resources-hero__title {
        font-size: var(--text-4xl);
    }

    .filter-bar {
        position: relative;
        top: 0;
    }

    .filter-bar__categories {
        justify-content: center;
    }

    .articles-grid {
        grid-template-columns: 1fr;
        gap: var(--space-24);
    }

    .article-card__content {
        padding: var(--space-24);
    }
}

@media (max-width: 375px) {
    .resources-hero__title {
        font-size: var(--text-3xl);
    }

    .filter-btn {
        font-size: var(--text-xs);
        padding: var(--space-8);
    }
}