/* ========== BLOG STYLES ========== */

/* ── Reading progress bar ── */
#reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-pink));
    box-shadow: 0 0 8px var(--cyan-glow-lg);
    z-index: 9999;
    transition: width 0.1s linear;
}

/* ── Copy button on code blocks ── */
.pre-wrapper {
    position: relative;
}

.copy-btn {
    position: absolute;
    top: 0.6rem;
    right: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 1px;
    padding: 0.25rem 0.7rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.pre-wrapper:hover .copy-btn {
    opacity: 1;
}

.copy-btn:hover {
    color: var(--neon-cyan);
    border-color: var(--neon-cyan);
}

.copy-btn.copied {
    color: var(--neon-green);
    border-color: var(--neon-green);
    opacity: 1;
}

/* ── Background: subtle for readability ── */
.blog-page .gradient-orbs .orb {
    opacity: 0.06 !important;
    filter: blur(110px) !important;
}

.blog-page .grid-bg {
    opacity: 0.2 !important;
}

/* ── Light theme blog: warm, clean reading experience ── */
[data-theme="light"] .blog-page .gradient-orbs .orb {
    opacity: 0.05 !important;
    filter: blur(150px) !important;
}

[data-theme="light"] .blog-hero-subtitle {
    font-family: var(--font-body);
    font-style: italic;
}

/* ── Blog Hero ── */
.blog-main {
    padding-top: 100px;
}

.blog-hero {
    text-align: center;
    padding: 3rem 2rem 1rem;
    max-width: 1200px;
    margin: 0 auto;
    opacity: 1 !important;
    transform: none !important;
}

.blog-hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: -2rem;
}

/* Filter Buttons */
.blog-filter {
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    flex-wrap: wrap;
    padding: 1rem 2rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    opacity: 1 !important;
    transform: none !important;
}

.filter-btn {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 2px;
    padding: 0.5rem 1.2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 8px;
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    background: var(--cyan-glow-fill);
    box-shadow: 0 0 15px var(--cyan-glow-md);
}

/* Blog List */
.blog-list {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem 2rem 4rem;
    display: flex;
    flex-direction: column;
    gap: 0;
    opacity: 1 !important;
    transform: none !important;
}

/* ── Blog Card — Dark: editorial journal index ── */
.blog-card {
    display: grid;
    grid-template-columns: 100px 1fr;
    column-gap: 1.5rem;
    padding: 1.3rem 0;
    padding-left: 0;
    text-decoration: none;
    color: inherit;
    /* Override neon-card glass morphism */
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: none;
    border-bottom: 1px solid var(--glass-border);
    border-radius: 0;
    box-shadow: none;
    overflow: visible;
    border-left: 2px solid transparent;
    transition: border-color 0.3s ease, padding-left 0.3s ease;
}

.blog-card::before,
.blog-card::after {
    display: none;
}

.blog-card:hover {
    transform: none;
    box-shadow: none;
    border-bottom-color: var(--glass-border);
    border-left-color: var(--neon-cyan);
    padding-left: 1rem;
}

.blog-card:hover .blog-card-title {
    color: var(--neon-cyan);
}

.blog-card-header {
    grid-column: 1;
    grid-row: 1 / -1;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 0;
    align-items: flex-start;
    padding-top: 0.15rem;
}

.blog-date {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.blog-date i {
    display: none;
}

.blog-tags {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.blog-tag {
    font-family: var(--font-mono);
    font-size: 0.58rem;
    letter-spacing: 1px;
    padding: 0;
    border: none;
    color: var(--neon-pink);
    border-radius: 0;
    text-transform: uppercase;
}

.blog-card-title {
    grid-column: 2;
    grid-row: 1;
    font-family: var(--font-body);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 0.2rem;
    line-height: 1.3;
    text-align: left;
    transition: color 0.3s ease;
}

.blog-card-title::after {
    display: none;
}

.blog-card-excerpt {
    grid-column: 2;
    grid-row: 2;
    font-family: var(--font-body);
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-footer {
    grid-column: 2;
    grid-row: 3;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.3rem;
}

.read-time {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-secondary);
    opacity: 0.5;
}

.read-time i {
    margin-right: 0.3rem;
}

.read-more {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--neon-cyan);
    letter-spacing: 1px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.blog-card:hover .read-more {
    opacity: 1;
}

.read-more i {
    margin-left: 0.3rem;
    transition: transform 0.3s ease;
}

.blog-card:hover .read-more i {
    transform: translateX(4px);
}

/* ── Blog Card — Light: reading list ── */
[data-theme="light"] .blog-card {
    grid-template-columns: 1fr auto;
    column-gap: 2rem;
    align-items: baseline;
    border-left: none;
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
    box-shadow: none;
}

[data-theme="light"] .blog-card:hover {
    transform: none;
    box-shadow: none;
    border-left: none;
    padding-left: 0;
}

[data-theme="light"] .blog-card:hover .blog-card-title {
    color: var(--neon-pink);
}

[data-theme="light"] .blog-card-header {
    grid-column: 2;
    grid-row: 1;
    padding-top: 0;
}

[data-theme="light"] .blog-card-title {
    grid-column: 1;
    grid-row: 1;
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 0;
}

[data-theme="light"] .blog-date {
    font-family: 'Lora', serif;
    font-style: italic;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

[data-theme="light"] .blog-tags,
[data-theme="light"] .blog-card-excerpt,
[data-theme="light"] .blog-card-footer {
    display: none;
}

/* ── Filter buttons — Light: serif, underline active ── */
[data-theme="light"] .filter-btn {
    font-family: 'Cormorant Garamond', serif;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    text-transform: none;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    padding: 0.4rem 0.8rem;
    color: var(--text-secondary);
}

[data-theme="light"] .filter-btn:hover,
[data-theme="light"] .filter-btn.active {
    background: transparent;
    box-shadow: none;
    border-color: transparent;
    border-bottom-color: var(--neon-pink);
    color: var(--text-heading);
}

/* ── Lab page: restore standard card appearance ── */
.lab-page .blog-card {
    display: block;
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    overflow: hidden;
}

.lab-page .blog-card::before {
    display: block;
}

.lab-page .blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 0 25px rgba(88, 196, 220, 0.08), 0 16px 48px rgba(0, 0, 0, 0.2);
    padding-left: 2rem;
    border-left-color: rgba(255, 255, 255, 0.06);
    border-color: rgba(0, 240, 255, 0.2);
}

.lab-page .blog-card-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-top: 0;
}

.lab-page .blog-date i {
    display: inline;
    margin-right: 0.3rem;
    color: var(--neon-cyan);
}

.lab-page .blog-tag {
    padding: 0.2rem 0.7rem;
    border: 1px solid rgba(224, 112, 152, 0.2);
}

.lab-page .blog-card-title {
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
}

.lab-page .blog-card-excerpt {
    -webkit-line-clamp: unset;
    display: block;
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 1.2rem;
}

.lab-page .blog-card-footer {
    margin-top: 0;
}

.lab-page .read-time {
    font-size: 0.8rem;
    opacity: 1;
}

.lab-page .read-more {
    font-size: 0.8rem;
    opacity: 1;
}

/* ========== BLOG POST PAGE ========== */
.post-main {
    padding-top: 100px;
}

.post-header {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 2rem 1rem;
    text-align: center;
    opacity: 1 !important;
    transform: none !important;
}

.post-meta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.post-title {
    font-family: var(--font-body);
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--text-heading);
    line-height: 1.3;
    margin-bottom: 1rem;
}

.post-title::after {
    display: none;
}

.post-subtitle {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.post-divider {
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-pink));
    margin: 0 auto;
    box-shadow: 0 0 10px var(--cyan-glow-lg);
}

/* Post Content */
.post-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 2rem 4rem;
    opacity: 1 !important;
    transform: none !important;
}

.post-content h2 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--neon-cyan);
    letter-spacing: 2px;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    text-align: left;
    text-shadow: 0 0 8px var(--cyan-glow-lg);
}

.post-content h2::after {
    margin: 0.8rem 0 0 0;
    background: linear-gradient(90deg, var(--neon-cyan), transparent);
    width: 80px;
}

.post-content h3 {
    font-family: var(--font-body);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.post-content p {
    font-family: var(--font-body);
    font-size: 1.05rem;
    color: var(--text-primary);
    line-height: 1.9;
    margin-bottom: 1.2rem;
}

.post-content ul,
.post-content ol {
    margin-bottom: 1.2rem;
    padding-left: 1.5rem;
}

.post-content li {
    font-family: var(--font-body);
    font-size: 1.05rem;
    color: var(--text-primary);
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

.post-content ul li::marker {
    color: var(--neon-cyan);
}

.post-content ol li::marker {
    color: var(--neon-pink);
    font-family: var(--font-mono);
}

.post-content a {
    color: var(--neon-cyan);
    border-bottom: 1px solid var(--border-hover);
    transition: all 0.3s ease;
}

.post-content a:hover {
    text-shadow: 0 0 8px var(--cyan-text-glow);
    border-bottom-color: var(--neon-cyan);
}

.post-content strong {
    color: var(--text-heading);
}

.post-content em {
    color: var(--neon-pink);
    font-style: italic;
}

/* Code blocks */
.post-content code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    background: var(--cyan-glow-fill);
    border: 1px solid var(--cyan-glow-md);
    padding: 0.15rem 0.5rem;
    border-radius: 3px;
    color: var(--neon-green);
}

.post-content pre {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: var(--glass-shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    overflow-x: auto;
    position: relative;
}

.post-content pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text-primary);
}

/* Prism.js overrides — keep background consistent with glass theme */
.post-content pre[class*="language-"],
.post-content code[class*="language-"] {
    background: transparent;
    text-shadow: none;
}

.post-content pre[class*="language-"] {
    border: 1px solid var(--glass-border);
}

/* Math blocks */
.math-block {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: var(--glass-shadow);
    padding: 1.5rem;
    margin: 1.5rem 0;
    overflow-x: auto;
    text-align: center;
}

/* Blockquote */
.post-content blockquote {
    border-left: 3px solid var(--neon-pink);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 0 12px 12px 0;
    box-shadow: var(--glass-shadow);
}

.post-content blockquote p {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 0;
}

/* Definition / Info boxes */
.info-box {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: var(--glass-shadow);
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.info-box .info-title {
    font-family: var(--font-display);
    font-size: 0.85rem;
    color: var(--neon-cyan);
    letter-spacing: 2px;
    margin-bottom: 0.8rem;
    text-shadow: 0 0 5px var(--cyan-glow-lg);
}

/* References */
.references {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: var(--glass-shadow);
    padding: 2rem;
    margin-top: 1rem;
}

.ref-list {
    list-style: none;
    padding: 0;
    counter-reset: ref-counter;
}

.ref-list li {
    counter-increment: ref-counter;
    position: relative;
    padding-left: 2.5rem;
    margin-bottom: 1.2rem;
    font-size: 0.92rem;
    line-height: 1.7;
    color: var(--text-secondary);
    border-left: 2px solid var(--border-subtle);
    padding-top: 0.2rem;
    padding-bottom: 0.2rem;
    transition: border-color 0.3s ease;
}

.ref-list li:hover {
    border-left-color: var(--neon-cyan);
}

.ref-list li::before {
    content: "[" counter(ref-counter) "]";
    position: absolute;
    left: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--neon-cyan);
    text-shadow: 0 0 5px var(--cyan-glow-lg);
}

.ref-list li:last-child {
    margin-bottom: 0;
}

.ref-authors {
    color: var(--text-primary);
    font-weight: 600;
}

.ref-title {
    color: var(--text-heading);
    font-style: italic;
    margin: 0 0.3rem;
}

.ref-venue {
    color: var(--text-secondary);
    font-family: var(--font-body);
}

.ref-link {
    margin-left: 0.5rem;
    color: var(--neon-cyan) !important;
    border-bottom: none !important;
    font-size: 0.8rem;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.ref-link:hover {
    opacity: 1;
}

/* Post navigation */
.post-nav {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    justify-content: space-between;
    border-top: 1px solid var(--border-subtle);
}

.post-nav a {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--neon-cyan);
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.post-nav a:hover {
    text-shadow: 0 0 8px var(--cyan-text-glow);
}

/* KaTeX overrides for neon theme */
.katex {
    color: var(--text-primary) !important;
    font-size: 1.1em !important;
}

.katex-display {
    margin: 1rem 0 !important;
}

.katex-display > .katex {
    color: var(--text-heading) !important;
}

/* Blog section on main page — single column editorial */
.blog-preview-grid {
    display: flex;
    flex-direction: column;
    max-width: 800px;
    margin: 0 auto 2rem;
    padding: 0 2rem;
}

.blog-preview-card {
    display: block;
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.blog-preview-card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 0 30px var(--cyan-glow-sm);
}

.blog-preview-card .blog-card-title {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}

.blog-preview-card .blog-card-excerpt {
    font-size: 0.9rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.view-all-btn {
    display: block;
    text-align: center;
    margin: 0 auto;
    width: fit-content;
}

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

    .blog-card {
        grid-template-columns: 80px 1fr;
        column-gap: 1rem;
        padding: 1rem 0;
    }

    .blog-card:hover {
        padding-left: 0.5rem;
    }

    .blog-card-title {
        font-size: 1.1rem;
    }

    .blog-date {
        font-size: 0.65rem;
    }

    .blog-tag {
        font-size: 0.55rem;
    }

    .blog-preview-grid {
        padding: 0 1rem;
    }

    .post-content pre {
        padding: 1rem;
    }

    [data-theme="light"] .blog-card {
        column-gap: 1rem;
    }

    [data-theme="light"] .blog-card-title {
        font-size: 1.15rem;
    }
}

@media (max-width: 480px) {
    .post-title {
        font-size: 1.5rem;
    }

    .blog-card {
        grid-template-columns: 1fr;
        gap: 0.3rem;
    }

    .blog-card-header {
        grid-column: 1;
        grid-row: auto;
        flex-direction: row;
        align-items: center;
        gap: 0.8rem;
    }

    .blog-card-title {
        grid-column: 1;
    }

    .blog-card-excerpt {
        grid-column: 1;
    }

    .blog-card-footer {
        grid-column: 1;
    }

    [data-theme="light"] .blog-card-header {
        grid-column: 1;
        grid-row: 2;
    }

    [data-theme="light"] .blog-card-title {
        grid-column: 1;
        grid-row: 1;
    }
}