/* ═══════════════════════════════════════════
   RimBomBang · blog.css
   Blog listing + Article + Instagram Explore mobile
═══════════════════════════════════════════ */

/* ════ BLOG HERO ════ */
.blog-hero {
    position: relative;
}

/* ════ SEARCH & FILTERS ════ */
.blog-controls {
    margin-bottom: 3rem;
}

.blog-search {
    position: relative;
    max-width: 500px;
    margin: 0 auto 1.5rem;
}

.blog-search input {
    width: 100%;
    padding: 0.85rem 1.25rem 0.85rem 3rem;
    border: 1.5px solid var(--border-card);
    border-radius: var(--radius-pill);
    font-family: var(--font-body);
    font-size: 0.92rem;
    color: var(--text-primary);
    background: var(--bg-card);
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.blog-search input:focus {
    border-color: var(--brand-cyan);
    box-shadow: 0 0 0 3px rgba(0, 171, 223, 0.1);
}

.blog-search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.blog-search-icon svg {
    width: 18px;
    height: 18px;
    stroke: var(--text-muted);
}

.blog-categories {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.cat-chip {
    padding: 0.4rem 1rem;
    border-radius: var(--radius-pill);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    border: 1.5px solid var(--border-card);
    background: var(--bg-card);
    color: var(--text-secondary);
    transition: all 0.25s;
}

.cat-chip:hover,
.cat-chip.active {
    background: var(--brand-lighter);
    border-color: var(--brand-cyan);
    color: var(--brand-cyan);
}

/* ════ BLOG GRID (Desktop) ════ */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.75rem;
}

.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.blog-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-medium);
}

.blog-card-image {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
    display: block;
    background: var(--gradient-subtle);
}

/* Placeholder image with gradient */
.blog-card-img-placeholder {
    width: 100%;
    aspect-ratio: 16/10;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    position: relative;
    overflow: hidden;
}

.blog-card-img-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.08;
}

.blog-card-img-placeholder.bg-1 {
    background: linear-gradient(135deg, #E0F7FA, #B2EBF2);
}

.blog-card-img-placeholder.bg-2 {
    background: linear-gradient(135deg, #E0F2F1, #B2DFDB);
}

.blog-card-img-placeholder.bg-3 {
    background: linear-gradient(135deg, #E1F5FE, #B3E5FC);
}

.blog-card-img-placeholder.bg-4 {
    background: linear-gradient(135deg, #F0F4C3, #E6EE9C);
}

.blog-card-img-placeholder.bg-5 {
    background: linear-gradient(135deg, #FCE4EC, #F8BBD0);
}

.blog-card-img-placeholder.bg-6 {
    background: linear-gradient(135deg, #E8EAF6, #C5CAE9);
}

.blog-card-body {
    padding: 1.5rem;
}

.blog-card-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.blog-card-cat {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--brand-cyan);
    background: var(--brand-lighter);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-pill);
}

.blog-card-date {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.blog-card-read {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-left: auto;
}

.blog-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.35;
    transition: color 0.2s;
}

.blog-card:hover h3 {
    color: var(--brand-cyan);
}

.blog-card-excerpt {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ════ ARTICLE PAGE ════ */
.article-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 4rem;
    align-items: start;
}

.article-header {
    margin-bottom: 2rem;
}

.article-header .blog-card-cat {
    margin-bottom: 1rem;
    display: inline-block;
}

.article-header h1 {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-subtle);
}

.article-content {
    font-size: 1.1rem;
    line-height: 1.9;
    color: var(--text-primary);
}

.article-content h2 {
    font-size: 1.5rem;
    margin: 2.5rem 0 1rem;
}

.article-content h3 {
    font-size: 1.25rem;
    margin: 2rem 0 0.75rem;
}

.article-content p {
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
}

.article-content ul,
.article-content ol {
    margin: 1rem 0 1.25rem 1.5rem;
    color: var(--text-secondary);
}

.article-content li {
    margin-bottom: 0.5rem;
}

.article-content blockquote {
    border-left: 4px solid var(--brand-cyan);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: var(--brand-lighter);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--text-secondary);
}

.article-content strong {
    color: var(--text-primary);
}

/* Article sidebar */
.article-sidebar {
    position: sticky;
    top: calc(var(--nav-h) + 2rem);
}

.sidebar-section {
    margin-bottom: 2rem;
}

.sidebar-section h4 {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.sidebar-card {
    display: block;
    padding: 1rem;
    border: 1px solid var(--border-card);
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    transition: all 0.2s;
    text-decoration: none;
    color: inherit;
}

.sidebar-card:hover {
    border-color: var(--border-medium);
    background: var(--bg-secondary);
}

.sidebar-card h5 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    line-height: 1.35;
}

.sidebar-card span {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.article-cta {
    background: var(--bg-secondary);
    border: 1px solid var(--border-card);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    margin-top: 3rem;
}

.article-cta h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.article-cta p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

/* ════ MOBILE: Instagram Explore Style ════ */
@media (max-width: 768px) {

    /* Hide desktop controls */
    .blog-hero .section-sub {
        display: none;
    }

    /* Sticky search bar (Instagram-style) */
    .blog-controls {
        position: sticky;
        top: var(--nav-h);
        z-index: 50;
        background: var(--bg-primary);
        padding: 0.75rem 0;
        margin-bottom: 1rem;
        border-bottom: 1px solid var(--border-subtle);
    }

    .blog-search {
        margin-bottom: 0.75rem;
    }

    .blog-categories {
        justify-content: flex-start;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding-bottom: 0.25rem;
        gap: 0.4rem;
    }

    .blog-categories::-webkit-scrollbar {
        display: none;
    }

    .cat-chip {
        flex-shrink: 0;
        font-size: 0.75rem;
        padding: 0.35rem 0.85rem;
    }

    /* Masonry-style 2-column grid */
    .blog-grid {
        grid-template-columns: 1fr 1fr;
        gap: 4px;
    }

    .blog-card {
        border-radius: 4px;
        border: none;
        position: relative;
    }

    .blog-card:hover {
        transform: none;
        box-shadow: none;
    }

    .blog-card-img-placeholder {
        aspect-ratio: auto;
    }

    /* Alternate heights for masonry feel */
    .blog-card:nth-child(3n+1) .blog-card-img-placeholder {
        aspect-ratio: 1/1;
    }

    .blog-card:nth-child(3n+2) .blog-card-img-placeholder {
        aspect-ratio: 4/5;
    }

    .blog-card:nth-child(3n+3) .blog-card-img-placeholder {
        aspect-ratio: 3/4;
    }

    /* Overlay text on image */
    .blog-card-body {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        padding: 2.5rem 0.75rem 0.75rem;
        background: linear-gradient(transparent, rgba(0, 0, 0, 0.75));
        color: #fff;
    }

    .blog-card h3 {
        font-size: 0.82rem;
        color: #fff;
        margin-bottom: 0.25rem;
        -webkit-line-clamp: 2;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .blog-card:hover h3 {
        color: #fff;
    }

    .blog-card-excerpt {
        display: none;
    }

    .blog-card-date {
        display: none;
    }

    .blog-card-read {
        display: none;
    }

    .blog-card-cat {
        font-size: 0.6rem;
        padding: 0.15rem 0.4rem;
        background: rgba(0, 171, 223, 0.3);
        backdrop-filter: blur(4px);
        color: #fff;
    }

    .blog-card-meta {
        margin-bottom: 0.35rem;
    }

    /* Article layout */
    .article-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .article-sidebar {
        position: static;
    }

    .article-content {
        font-size: 1.05rem;
    }
}

/* ── Article reader modal (mobile) ── */
.article-reader-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: var(--bg-primary);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transform: translateY(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.article-reader-overlay.open {
    transform: translateY(0);
}

.reader-close {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    padding: 1rem var(--px);
    background: rgba(250, 251, 252, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
}

.reader-close button {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    font-family: var(--font-body);
}

.reader-close button svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-secondary);
}

.reader-content {
    padding: 1.5rem var(--px) 4rem;
    max-width: 680px;
    margin: 0 auto;
}

.reader-content h1 {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
}

.reader-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.reader-body {
    font-size: 1.1rem;
    line-height: 1.9;
    color: var(--text-secondary);
}

.reader-body p {
    margin-bottom: 1.25rem;
}

.reader-body h2 {
    font-size: 1.35rem;
    margin: 2rem 0 0.75rem;
    color: var(--text-primary);
}

.reader-body blockquote {
    border-left: 3px solid var(--brand-cyan);
    padding: 0.75rem 1rem;
    margin: 1rem 0;
    background: var(--brand-lighter);
    border-radius: 0 8px 8px 0;
    font-style: italic;
}

/* Desktop: hide mobile reader */
@media (min-width: 769px) {
    .article-reader-overlay {
        display: none;
    }
}

/* ════ Responsive adjustments ════ */
@media (max-width: 480px) {
    .blog-grid {
        gap: 3px;
    }

    .blog-card h3 {
        font-size: 0.75rem;
    }
}

@media (max-width: 900px) {
    .article-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}