/**
 * Blog Page Styles
 * Modern, readable design for tech news aggregation
 */

/* ============================================
   BLOG HERO
   ============================================ */
.blog-hero {
    background: var(--gradient-dark);
    color: var(--color-white);
    padding: calc(var(--spacing-3xl) + 80px) 0 var(--spacing-3xl);
    text-align: center;
}

.blog-hero h1 {
    font-size: var(--font-size-4xl);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.blog-hero .hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-gray-lighter);
    margin: 0;
}

/* ============================================
   FILTER SECTION
   ============================================ */
.filter-section {
    background: var(--color-light);
    padding: var(--spacing-xl) 0;
    border-bottom: 2px solid var(--color-gray-lighter);
    position: sticky;
    top: 80px;
    z-index: 100;
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    align-items: center;
}

.filter-label {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-dark);
    margin: 0;
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    flex: 1;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--color-white);
    border: 2px solid var(--color-gray-lighter);
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-dark);
    cursor: pointer;
    transition: all var(--transition-base);
}

.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

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

.filter-btn svg {
    flex-shrink: 0;
}

/* Alert filter buttons - Safety & Senior Scams */
.filter-btn.filter-alert {
    border-color: #ff9800;
    background: linear-gradient(135deg, #fff8e6 0%, #ffe8e8 100%);
}

.filter-btn.filter-alert:hover {
    border-color: #d32f2f;
    color: #d32f2f;
    background: linear-gradient(135deg, #ffebcc 0%, #ffd6d6 100%);
}

.filter-btn.filter-alert.active {
    background: linear-gradient(135deg, #ff9800 0%, #d32f2f 100%);
    border-color: #d32f2f;
    color: var(--color-white);
}

/* ============================================
   BLOG GRID
   ============================================ */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

/* Loading State */
.loading-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.loader {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-gray-lighter);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

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

/* ============================================
   BLOG CARD
   ============================================ */
.blog-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
}

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

.blog-card-image {
    width: 100%;
    height: 200px;
    background: var(--gradient-dark);
    overflow: hidden;
    position: relative;
}

.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.blog-card:hover .blog-card-image img {
    transform: scale(1.05);
}

/* Alert Cards - Safety & Senior Scams */
.blog-card.alert-card {
    border: 3px solid #ff9800;
    background: linear-gradient(135deg, #fff8e6 0%, #ffe8e8 100%);
    box-shadow: 0 4px 20px rgba(255, 152, 0, 0.3);
}

.blog-card.alert-card:hover {
    border-color: #d32f2f;
    box-shadow: 0 8px 30px rgba(211, 47, 47, 0.4);
}

.blog-card.alert-card .blog-card-title a {
    color: #d32f2f;
}

.blog-card.alert-card .blog-category {
    background: linear-gradient(135deg, #ff9800 0%, #d32f2f 100%);
    color: white !important;
    font-weight: var(--font-weight-bold);
}

.blog-card-image.placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-card-image.placeholder svg {
    width: 64px;
    height: 64px;
    color: var(--color-white);
    opacity: 0.3;
}

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

.blog-card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.blog-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-light);
    color: var(--color-primary);
    font-size: 14px;
    font-weight: var(--font-weight-semibold);
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.blog-category.ai { background: rgba(0, 102, 255, 0.1); }
.blog-category.tech { background: rgba(16, 185, 129, 0.1); color: #059669; }
.blog-category.marketing { background: rgba(249, 115, 22, 0.1); color: #ea580c; }
.blog-category.cybersecurity { background: rgba(220, 38, 38, 0.1); color: #dc2626; }
.blog-category.business { background: rgba(139, 92, 246, 0.1); color: #7c3aed; }
.blog-category.safety {
    background: linear-gradient(135deg, #ff9800 0%, #d32f2f 100%);
    color: white !important;
    font-weight: var(--font-weight-bold);
}
.blog-category.senior-scams {
    background: linear-gradient(135deg, #f57c00 0%, #c62828 100%);
    color: white !important;
    font-weight: var(--font-weight-bold);
}

.blog-date {
    color: var(--color-gray);
    font-size: 14px;
}

.blog-card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    line-height: var(--line-height-tight);
}

.blog-card-title a {
    color: var(--color-dark);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.blog-card-title a:hover {
    color: var(--color-primary);
}

.blog-card-excerpt {
    color: var(--color-gray);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.blog-local-context {
    background: rgba(0, 102, 255, 0.05);
    border-left: 3px solid var(--color-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: 15px;
    color: var(--color-gray-dark);
    font-style: italic;
}

/* Alert context styling */
.blog-local-context.alert-context {
    background: rgba(255, 152, 0, 0.15);
    border-left: 4px solid #d32f2f;
    color: #c62828;
    font-weight: var(--font-weight-medium);
    font-style: normal;
}

/* Freshness indicator for alerts */
.alert-freshness {
    display: inline-flex;
    align-items: center;
    font-size: 13px;
    color: #d32f2f;
    font-weight: var(--font-weight-bold);
    padding: 4px 10px;
    background: rgba(211, 47, 47, 0.1);
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.blog-card-footer {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-lighter);
}

.blog-source {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--color-gray);
}

.blog-curator {
    display: inline-flex;
    align-items: center;
    font-size: 13px;
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    padding: 4px 10px;
    background: rgba(0, 102, 255, 0.08);
    border-radius: 4px;
    margin-left: auto;
}

.blog-source svg {
    width: 16px;
    height: 16px;
}

.blog-read-more-container {
    margin-top: var(--spacing-sm);
    width: 100%;
}

.blog-read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    font-size: 15px;
    text-decoration: none;
    transition: gap var(--transition-fast);
}

.blog-read-more:hover {
    gap: 10px;
    color: var(--color-primary-dark);
}

.blog-read-more svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   LOAD MORE
   ============================================ */
.load-more-container {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

#load-more-btn {
    min-width: 200px;
}

/* ============================================
   BLOG CTA
   ============================================ */
.blog-cta {
    background: var(--color-light);
}

.cta-card {
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: var(--spacing-3xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.cta-card h2 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.cta-card p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.empty-state svg {
    width: 80px;
    height: 80px;
    color: var(--color-gray-light);
    margin-bottom: var(--spacing-lg);
}

.empty-state h3 {
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--color-gray);
    margin: 0;
}

/* ============================================
   SCROLL TO TOP BUTTON
   ============================================ */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.scroll-to-top svg {
    width: 24px;
    height: 24px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .blog-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .blog-hero {
        padding: calc(var(--spacing-2xl) + 80px) 0 var(--spacing-2xl);
    }

    .blog-hero h1 {
        font-size: var(--font-size-3xl);
    }

    .filter-section {
        position: static;
    }

    .filter-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .filter-buttons {
        width: 100%;
    }

    .filter-btn {
        flex: 1;
        min-width: 0;
        justify-content: center;
    }

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

    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }

    .cta-buttons .button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .filter-btn {
        font-size: 14px;
        padding: 10px 16px;
    }

    .blog-card-title {
        font-size: var(--font-size-lg);
    }
}