/* Blog Index Page Styles
   Styles specific to the blog listing page (index.html)
   ===================================================== */
/* Blog Styling — Material Design 3 Inspired Redesign
   Shared base styles for all blog pages
   ================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&family=JetBrains+Mono:wght@400&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&display=swap');

/* ========== Design Tokens ========== */
:root {
    /* Color System */
    --primary: #0059bb;
    --primary-container: #0070ea;
    --on-primary: #ffffff;
    --on-primary-container: #fefcff;
    --on-primary-fixed: #001a41;
    --secondary: #535997;
    --secondary-container: #b3b9ff;
    --on-secondary-container: #414785;
    --tertiary: #4e6400;
    --surface: #fbf9f8;
    --surface-bright: #fbf9f8;
    --surface-container: #f0eded;
    --surface-container-low: #f6f3f2;
    --surface-container-lowest: #ffffff;
    --surface-container-high: #eae8e7;
    --surface-container-highest: #e4e2e1;
    --surface-variant: #e4e2e1;
    --surface-dim: #dcd9d9;
    --on-surface: #1b1c1c;
    --on-surface-variant: #414754;
    --on-background: #1b1c1c;
    --outline: #717786;
    --outline-variant: #c1c6d7;
    --inverse-surface: #303030;
    --inverse-on-surface: #f3f0f0;
    --inverse-primary: #adc7ff;
    --error: #ba1a1a;
    --error-container: #ffdad6;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 12px;
    --space-base: 8px;
    --space-md: 24px;
    --space-lg: 40px;
    --space-xl: 64px;
    --gutter: 24px;
    --container-max: 1280px;

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-code: 'JetBrains Mono', 'Fira Code', monospace;

    /* Shadows */
    --shadow-card: 0 4px 20px -2px rgba(30, 36, 96, 0.05);
    --shadow-card-hover: 0 12px 30px -4px rgba(30, 36, 96, 0.08);

    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.2s ease;
}

/* ========== Base Styles ========== */
.blog-page-body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 24px;
    color: var(--on-background);
    background-color: var(--surface);
    background-image: radial-gradient(circle at 2px 2px, var(--surface-container-highest) 1px, transparent 0);
    background-size: 48px 48px;
}

.material-symbols-outlined {
    font-family: 'Material Symbols Outlined';
    font-weight: normal;
    font-style: normal;
    font-size: 24px;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    display: inline-block;
    white-space: nowrap;
    word-wrap: normal;
    direction: ltr;
    -webkit-font-feature-settings: 'liga';
    font-feature-settings: 'liga';
    -webkit-font-smoothing: antialiased;
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    vertical-align: middle;
}

/* ========== Breadcrumb ========== */
.blog-breadcrumb {
    padding: 20px;
    font-size: 14px;
    line-height: 20px;
    color: var(--on-surface-variant);
}

.blog-breadcrumb a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.blog-breadcrumb a:hover {
    color: var(--secondary);
}

.blog-breadcrumb span {
    margin: 0 8px;
}

/* ========== Error State ========== */
.blog-error {
    background: var(--surface-container-lowest);
    padding: 60px 30px;
    text-align: center;
    border-radius: 8px;
    box-shadow: var(--shadow-card);
}

.blog-error h2 {
    color: var(--primary);
    font-size: 1.8rem;
    margin-bottom: 15px;
}

.blog-error p {
    color: var(--on-surface-variant);
    font-size: 1rem;
    margin: 10px 0;
}

/* ========== Loading Skeleton ========== */
.post-card.skeleton {
    cursor: progress;
}

.skeleton-image {
    width: 100%;
    height: 192px;
    background: linear-gradient(90deg, var(--surface-container) 25%, var(--surface-dim) 50%, var(--surface-container) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

.skeleton-content {
    padding: var(--space-md);
}

.skeleton-title {
    height: 20px;
    background: linear-gradient(90deg, var(--surface-container) 25%, var(--surface-dim) 50%, var(--surface-container) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    margin-bottom: 12px;
    border-radius: 4px;
}

.skeleton-text {
    height: 12px;
    background: linear-gradient(90deg, var(--surface-container) 25%, var(--surface-dim) 50%, var(--surface-container) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    margin-bottom: 10px;
    border-radius: 4px;
}

/* ========== Animations ========== */
@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 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 fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Floating gradient orbs */
@keyframes floatOrb1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -20px) scale(1.05); }
    50% { transform: translate(-10px, 15px) scale(0.95); }
    75% { transform: translate(20px, 10px) scale(1.02); }
}

@keyframes floatOrb2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(-25px, 15px) scale(1.08); }
    66% { transform: translate(15px, -20px) scale(0.96); }
}

/* Shimmer text gradient */
@keyframes shimmerText {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 200% center; }
}

/* Pulsing decorative orb */
@keyframes pulseOrb {
    0%, 100% { transform: scale(1); opacity: 0.6; }
    50% { transform: scale(1.15); opacity: 1; }
}

/* Slide in from left */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Slide in from right */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Scale in */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Ripple effect for buttons */
@keyframes rippleOut {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* ========== Scroll Reveal System ========== */
/* Generic reveal classes applied by IntersectionObserver */
.reveal-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-down {
    opacity: 0;
    transform: translateY(-40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.85);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-up.revealed,
.reveal-down.revealed,
.reveal-left.revealed,
.reveal-right.revealed,
.reveal-scale.revealed {
    opacity: 1;
    transform: translateY(0) translateX(0) scale(1);
}

/* ========== Reduced Motion ========== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .reveal-up,
    .reveal-down,
    .reveal-left,
    .reveal-right,
    .reveal-scale {
        opacity: 1;
        transform: none;
    }
}

/* ========== Print Styles ========== */
@media print {
    .blog-post-header,
    .blog-post-footer {
        border: none;
    }

    .blog-post-title {
        color: #000;
    }

    .blog-post-content a {
        text-decoration: underline;
    }

    .blog-sidebar,
    .post-sidebar,
    .category-filter,
    .blog-pagination,
    .featured-cta,
    .post-newsletter,
    .related-articles,
    .blog-post-actions,
    .share-section {
        display: none;
    }
}

/* ========== Blog Container ========== */
.blog-container {
    max-width: var(--container-max);
    margin: 5% auto;
    padding: 0 var(--gutter) var(--space-xl);
}

/* ========== Hero Section ========== */
.blog-hero {
    padding: var(--space-xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Animated gradient orbs behind hero */
.blog-hero::before,
.blog-hero::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0;
    transition: opacity 1.2s ease;
    pointer-events: none;
    z-index: 0;
}

.blog-hero::before {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 89, 187, 0.12) 0%, transparent 70%);
    top: -120px;
    left: -80px;
    animation: floatOrb1 8s ease-in-out infinite;
}

.blog-hero::after {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(83, 89, 151, 0.10) 0%, transparent 70%);
    bottom: -80px;
    right: -60px;
    animation: floatOrb2 10s ease-in-out infinite;
}

.blog-hero.revealed::before,
.blog-hero.revealed::after {
    opacity: 1;
}

.blog-hero-inner {
    max-width: 768px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.blog-hero h1 {
    font-family: var(--font-body);
    font-size: 32px;
    line-height: 40px;
    letter-spacing: -0.01em;
    font-weight: 700;
    color: var(--on-surface);
    margin: 0 0 var(--space-md);
    background: linear-gradient(135deg, var(--on-surface) 0%, var(--primary) 50%, var(--secondary) 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmerText 4s ease-in-out infinite;
}

@media (min-width: 768px) {
    .blog-hero h1 {
        font-size: 48px;
        line-height: 56px;
        letter-spacing: -0.02em;
    }
}

.blog-hero p {
    font-size: 18px;
    line-height: 28px;
    color: var(--on-surface-variant);
    margin: 0 0 var(--space-lg);
}

/* Hero Search Bar */
.blog-search-wrapper {
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
    position: relative;
    transition: transform 0.3s ease;
}

.blog-search-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 22px;
    color: var(--outline);
    transition: color 0.2s ease;
    pointer-events: none;
}

.blog-search-wrapper:focus-within .blog-search-icon {
    color: var(--primary);
}

.blog-search-input {
    width: 100%;
    padding: 16px 24px 16px 56px;
    border-radius: 50px;
    border: 2px solid var(--outline-variant);
    background: var(--surface-container-lowest);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 24px;
    color: var(--on-surface);
    outline: none;
    box-shadow: 0 2px 8px rgba(30, 36, 96, 0.04);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box;
}

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

.blog-search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(0, 89, 187, 0.1);
}

/* ========== Featured Post ========== */
.featured-post {
    margin-bottom: var(--space-xl);
}

.featured-post-card {
    position: relative;
    width: 100%;
    border-radius: 8px;
    overflow: hidden;
    background: var(--surface-container-lowest);
    box-shadow: var(--shadow-card);
}

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

.featured-post-grid {
    display: grid;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .featured-post-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.featured-post-image {
    height: 260px;
    position: relative;
    overflow: hidden;
}

@media (min-width: 768px) {
    .featured-post-image {
        height: 480px;
    }
}

.featured-post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s ease;
}

.featured-post-content {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.featured-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--primary);
    font-size: 14px;
    line-height: 16px;
    letter-spacing: 0.05em;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
}

.featured-label .material-symbols-outlined {
    font-size: 18px;
    font-variation-settings: 'FILL' 1;
}

.featured-post-content h2 {
    font-family: var(--font-body);
    font-size: 32px;
    line-height: 40px;
    font-weight: 700;
    color: var(--on-surface);
    margin: 0 0 var(--space-md);
}

.featured-post-content p {
    font-size: 16px;
    line-height: 24px;
    color: var(--on-surface-variant);
    margin: 0 0 var(--space-lg);
}

.featured-author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.featured-author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

.featured-author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-author-name {
    font-size: 14px;
    line-height: 16px;
    letter-spacing: 0.05em;
    font-weight: 600;
    color: var(--on-surface);
    margin: 0;
}

.featured-author-meta {
    font-size: 14px;
    line-height: 20px;
    color: var(--on-surface-variant);
    margin: 4px 0 0;
}

.featured-cta {
    margin-top: var(--space-lg);
}

.btn-primary-filled {
    display: inline-block;
    background: var(--primary);
    color: var(--on-primary);
    padding: var(--space-md) var(--space-lg);
    font-size: 14px;
    line-height: 16px;
    letter-spacing: 0.05em;
    font-weight: 600;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
}

.btn-primary-filled:hover {
    background: #004da3;
    box-shadow: 0 4px 12px rgba(0, 89, 187, 0.3);
}

.btn-primary-filled:active {
    transform: scale(0.95);
}

/* ========== Content Layout ========== */
.blog-content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    align-items: start;
}

@media (min-width: 1024px) {
    .blog-content-grid {
        grid-template-columns: 2fr 1fr;
    }
}

/* ========== Category Filter ========== */
.category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

/* Staggered entrance for category buttons */
.category-btn {
    padding: var(--space-sm) var(--space-md);
    font-size: 14px;
    line-height: 16px;
    letter-spacing: 0.05em;
    font-weight: 600;
    border-radius: 50px;
    border: 1px solid var(--outline-variant);
    background: var(--surface-container-lowest);
    color: var(--on-surface-variant);
    cursor: pointer;
    white-space: nowrap;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.4s ease, transform 0.4s ease, color 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.category-filter.revealed .category-btn {
    opacity: 1;
    transform: translateY(0);
}

.category-filter.revealed .category-btn:nth-child(1) { transition-delay: 0.05s; }
.category-filter.revealed .category-btn:nth-child(2) { transition-delay: 0.10s; }
.category-filter.revealed .category-btn:nth-child(3) { transition-delay: 0.15s; }
.category-filter.revealed .category-btn:nth-child(4) { transition-delay: 0.20s; }
.category-filter.revealed .category-btn:nth-child(5) { transition-delay: 0.25s; }

.category-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
}

.category-btn.active {
    background: var(--primary);
    color: var(--on-primary);
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(0, 89, 187, 0.2);
}

/* ========== Post Grid ========== */
.posts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
    margin-bottom: 50px;
}

@media (min-width: 640px) {
    .posts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ========== Post Card ========== */
.post-card {
    background: var(--surface-container-lowest);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(193, 198, 215, 0.3);
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.post-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.post-card-link {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.post-card-image {
    width: 100%;
    height: 192px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--surface-container) 0%, var(--surface-dim) 100%);
}

.post-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.post-card-category {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    background: var(--secondary-container);
    color: var(--on-secondary-container);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 2px;
    font-size: 14px;
    line-height: 16px;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.post-card-content {
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.post-card-title {
    font-family: var(--font-body);
    font-size: 24px;
    line-height: 32px;
    font-weight: 600;
    color: var(--on-surface);
    margin: 0 0 var(--space-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.2s ease;
}

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

.post-card-excerpt {
    font-size: 14px;
    line-height: 20px;
    color: var(--on-surface-variant);
    margin: 0 0 var(--space-lg);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}

.post-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    border: none;
    padding: 0;
}

.post-card-date {
    font-size: 14px;
    line-height: 20px;
    color: var(--outline);
}

.post-card-read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--primary);
    font-size: 14px;
    line-height: 16px;
    letter-spacing: 0.05em;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-fast);
}

.post-card-read-more:hover {
    text-decoration: underline;
}

.post-card-read-more .material-symbols-outlined {
    font-size: 16px;
}

/* Staggered card reveal — triggered by IntersectionObserver */
.post-card {
    opacity: 0;
    transform: translateY(30px) scale(0.97);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.posts-grid.revealed .post-card {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.posts-grid.revealed .post-card:nth-child(1) { transition-delay: 0.05s; }
.posts-grid.revealed .post-card:nth-child(2) { transition-delay: 0.12s; }
.posts-grid.revealed .post-card:nth-child(3) { transition-delay: 0.19s; }
.posts-grid.revealed .post-card:nth-child(4) { transition-delay: 0.26s; }
.posts-grid.revealed .post-card:nth-child(5) { transition-delay: 0.33s; }
.posts-grid.revealed .post-card:nth-child(6) { transition-delay: 0.40s; }

/* ========== Pagination ========== */
.blog-pagination {
    margin-top: var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-base);
    flex-wrap: wrap;
}

.pagination-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    border: 1px solid var(--outline-variant);
    background: var(--surface-container-lowest);
    color: var(--on-surface);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
}

.pagination-btn:hover:not(.disabled):not(.active) {
    background: var(--surface-variant);
    border-color: var(--outline);
}

.pagination-btn.active {
    background: var(--primary);
    color: var(--on-primary);
    border-color: var(--primary);
}

.pagination-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.pagination-ellipsis {
    padding: var(--space-base) var(--space-xs);
    color: var(--on-surface-variant);
    font-weight: 600;
}

/* ========== Sidebar ========== */
.blog-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

/* Sidebar Card Base */
.sidebar-card {
    background: var(--surface-container-lowest);
    border-radius: 8px;
    padding: var(--space-md);
    border: 1px solid rgba(193, 198, 215, 0.3);
    box-shadow: var(--shadow-card);
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.5s ease, transform 0.5s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.sidebar-card.revealed {
    opacity: 1;
    transform: translateX(0);
}

.sidebar-card:hover {
    box-shadow: var(--shadow-card-hover);
    border-color: rgba(0, 89, 187, 0.15);
}

.sidebar-card-title {
    font-size: 14px;
    line-height: 16px;
    letter-spacing: 0.05em;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin: 0 0 var(--space-md);
}

/* Popular Posts */
.popular-posts-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.popular-post-item {
    display: block;
    text-decoration: none;
    color: inherit;
}

.popular-post-item h4 {
    font-size: 16px;
    line-height: 24px;
    font-weight: 400;
    color: var(--on-surface);
    margin: 0 0 var(--space-xs);
    transition: color 0.2s ease;
}

.popular-post-item:hover h4 {
    color: var(--primary);
}

.popular-post-item p {
    font-size: 14px;
    line-height: 20px;
    color: var(--outline);
    margin: 0;
}

.popular-post-divider {
    border: none;
    border-bottom: 1px solid rgba(193, 198, 215, 0.2);
    margin: 0;
}

/* Trending Categories */
.trending-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.trending-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    background: rgba(0, 89, 187, 0.05);
    color: var(--primary);
    font-size: 14px;
    line-height: 20px;
    font-weight: 600;
    border-radius: 2px;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    opacity: 0;
    transform: scale(0.8);
}

.sidebar-card.revealed .trending-tag {
    opacity: 1;
    transform: scale(1);
}

.sidebar-card.revealed .trending-tag:nth-child(1) { transition-delay: 0.05s; }
.sidebar-card.revealed .trending-tag:nth-child(2) { transition-delay: 0.10s; }
.sidebar-card.revealed .trending-tag:nth-child(3) { transition-delay: 0.15s; }
.sidebar-card.revealed .trending-tag:nth-child(4) { transition-delay: 0.20s; }
.sidebar-card.revealed .trending-tag:nth-child(5) { transition-delay: 0.25s; }
.sidebar-card.revealed .trending-tag:nth-child(6) { transition-delay: 0.30s; }

.trending-tag:hover {
    background: rgba(0, 89, 187, 0.12);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 89, 187, 0.15);
}

/* Sidebar Card Title with Icon */
.sidebar-card-title-icon {
    display: flex;
    align-items: center;
    gap: var(--space-base);
}

.sidebar-card-title-icon .material-symbols-outlined {
    font-size: 20px;
    color: var(--primary);
}

/* Categories Widget */
.categories-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.category-item {
    padding: 0;
}

.category-item + .category-item {
    border-top: 1px solid rgba(193, 198, 215, 0.3);
    padding-top: var(--space-sm);
    margin-top: var(--space-sm);
}

.category-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-decoration: none;
    color: inherit;
}

.category-name {
    font-size: 16px;
    line-height: 24px;
    color: var(--on-surface-variant);
    transition: color 0.2s ease;
}

.category-link:hover .category-name {
    color: var(--primary);
}

.category-count {
    background: var(--surface-container-high);
    color: var(--on-surface-variant);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    line-height: 16px;
    font-weight: 600;
}

/* Recent Posts Widget */
.recent-posts-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.recent-post-item {
    display: flex;
    gap: var(--space-sm);
    text-decoration: none;
    color: inherit;
}

.recent-post-thumb {
    width: 64px;
    height: 64px;
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
    background: var(--surface-container);
}

.recent-post-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.recent-post-item:hover .recent-post-thumb img {
    transform: scale(1.1);
}

.recent-post-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
}

.recent-post-title {
    font-size: 14px;
    line-height: 18px;
    font-weight: 600;
    color: var(--on-surface);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.2s ease;
}

.recent-post-item:hover .recent-post-title {
    color: var(--primary);
}

.recent-post-date {
    font-size: 11px;
    line-height: 16px;
    color: var(--outline);
    margin: 4px 0 0;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* Newsletter CTA */
.newsletter-card {
    background: var(--primary-container);
    padding: var(--space-lg);
    border-radius: 8px;
    color: var(--on-primary-container);
    position: relative;
    overflow: hidden;
    border: none;
    box-shadow: none;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.newsletter-card.revealed {
    opacity: 1;
    transform: translateY(0);
}

.newsletter-circle-deco {
    position: absolute;
    top: 0;
    right: 0;
    width: 128px;
    height: 128px;
    background: rgba(254, 252, 255, 0.1);
    border-radius: 50%;
    margin-right: -64px;
    margin-top: -64px;
    animation: pulseOrb 3s ease-in-out infinite;
}

/* Second decorative circle */
.newsletter-card::after {
    content: '';
    position: absolute;
    bottom: -40px;
    left: -40px;
    width: 100px;
    height: 100px;
    background: rgba(254, 252, 255, 0.06);
    border-radius: 50%;
    animation: pulseOrb 4s ease-in-out infinite 1s;
}

.newsletter-card:hover .newsletter-circle-deco {
    animation: none;
    transform: scale(1.3);
    transition: transform 0.5s ease;
}

.newsletter-card h3 {
    font-family: var(--font-body);
    font-size: 24px;
    line-height: 32px;
    font-weight: 600;
    margin: 0 0 var(--space-sm);
    position: relative;
    z-index: 1;
}

.newsletter-card > p {
    font-size: 14px;
    line-height: 20px;
    margin: 0 0 var(--space-lg);
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

.newsletter-form {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.newsletter-label {
    font-size: 14px;
    line-height: 16px;
    letter-spacing: 0.05em;
    font-weight: 600;
    text-transform: uppercase;
    opacity: 0.8;
    margin-bottom: var(--space-xs);
    display: block;
}

.newsletter-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--on-primary-container);
    border-radius: 4px;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 24px;
    outline: none;
    transition: var(--transition-fast);
    box-sizing: border-box;
}

.newsletter-input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.newsletter-input:focus {
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.2);
}

.newsletter-submit {
    width: 100%;
    background: var(--on-primary-fixed);
    color: var(--primary-container);
    padding: var(--space-sm) 0;
    font-size: 14px;
    line-height: 16px;
    letter-spacing: 0.05em;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
    position: relative;
    overflow: hidden;
}

.newsletter-submit::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.5s ease, height 0.5s ease;
}

.newsletter-submit:hover::after {
    width: 300px;
    height: 300px;
}

.newsletter-submit:hover {
    background: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.newsletter-submit:active {
    transform: translateY(0) scale(0.97);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* ========== Responsive — Index Page ========== */
@media (max-width: 768px) {
    .blog-hero {
        padding: var(--space-lg) 0;
    }

    .blog-hero h1 {
        font-size: 28px;
        line-height: 36px;
    }

    .blog-hero p {
        font-size: 16px;
        line-height: 24px;
    }

    .featured-post-content {
        padding: var(--space-md);
    }

    .featured-post-content h2 {
        font-size: 24px;
        line-height: 32px;
    }

    .posts-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .blog-pagination {
        gap: 4px;
    }

    .pagination-btn {
        width: 36px;
        height: 36px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .blog-container {
        padding: 0 16px var(--space-lg);
    }

    .blog-hero h1 {
        font-size: 24px;
        line-height: 32px;
    }

    .blog-hero p {
        font-size: 14px;
        line-height: 22px;
    }
}