/* Modern Blog Styles */

:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --primary-lighter: #334155;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --text: #0f172a;
    --text-secondary: #64748b;
    --bg: #ffffff;
    --bg-secondary: #f8fafc;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08);
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --border-radius: 0.5rem;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary: #f1f5f9;
        --primary-light: #e2e8f0;
        --primary-lighter: #cbd5e1;
        --accent: #60a5fa;
        --accent-hover: #93c5fd;
        --text: #f1f5f9;
        --text-secondary: #94a3b8;
        --bg: #0f172a;
        --bg-secondary: #1e293b;
        --border: #334155;
        --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.3);
    }
}

html[data-theme="dark"] {
    --primary: #f1f5f9;
    --primary-light: #e2e8f0;
    --primary-lighter: #cbd5e1;
    --accent: #60a5fa;
    --accent-hover: #93c5fd;
    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --bg: #0f172a;
    --bg-secondary: #1e293b;
    --border: #334155;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-header {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.site-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--accent) 35%, 
        var(--accent) 65%, 
        transparent 100%);
    opacity: 0.6;
}

.site-nav {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand a,
.nav-brand button {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--bg);
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: -0.5px;
    width: 36px;
    height: 36px;
    border-radius: 6px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav-brand a:hover,
.nav-brand button:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.brand-text {
    font-weight: 800;
    font-size: 1rem;
}

.nav-home {
    font-size: 0.9rem;
    font-weight: 600;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--accent);
}

.site-content {
    flex: 1;
    max-width: 1280px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-lg);
    width: 100%;
}

/* Hero Section */
.hero {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl) var(--spacing-lg);
    background: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 35px,
            rgba(59, 130, 246, 0.03) 35px,
            rgba(59, 130, 246, 0.03) 36px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 35px,
            rgba(59, 130, 246, 0.03) 35px,
            rgba(59, 130, 246, 0.03) 36px
        ),
        linear-gradient(135deg, rgba(3, 7, 30, 0.02) 0%, rgba(59, 130, 246, 0.05) 100%);
    border: 1px solid rgba(59, 130, 246, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--primary);
    margin: 0;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0;
    max-width: 900px;
    letter-spacing: -0.3px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Articles Section */
.articles {
    margin-bottom: var(--spacing-xl);
}

.articles-title {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--primary);
}

.articles-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.article-row {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
    transition: all 0.3s ease;
}

.article-row:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-lg);
    transform: translateX(2px);
}

.article-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.article-header {
    display: flex;
    gap: var(--spacing-md);
    align-items: baseline;
    flex-wrap: wrap;
}

.article-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0;
}

.article-title a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

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

.article-meta {
    display: flex;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
    flex-shrink: 0;
    align-items: center;
}

.article-date {
    display: inline-block;
}

.reading-time {
    display: inline-block;
    padding: 0 var(--spacing-xs);
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.article-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
}

.tag {
    display: inline-block;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.2s;
}

.tag:hover {
    background: var(--accent);
    color: white;
}

.article-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
    margin-left: var(--spacing-md);
    flex-shrink: 0;
}

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

.no-articles {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Post Page */
.post {
    max-width: 800px;
    margin: 0 auto;
}

.post-header {
    margin-bottom: var(--spacing-xl);
    border-bottom: 2px solid transparent;
    padding-bottom: var(--spacing-lg);
    background-image: linear-gradient(to bottom, transparent, transparent calc(100% - 2px), transparent);
    position: relative;
}

.post-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--accent) 35%,
        var(--accent) 65%,
        transparent 100%);
    opacity: 0.6;
}

.post-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
    color: var(--primary);
}

.post-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.post-date {
    font-weight: 600;
    color: var(--accent);
}

.post-author {
    font-weight: 500;
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.post-tags .tag {
    background: var(--accent);
    color: white;
}

.post-thumbnail {
    margin: var(--spacing-lg) 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.post-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
}

.post-excerpt {
    font-size: 1.125rem;
    font-style: italic;
    color: var(--text-secondary);
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-left: 4px solid var(--accent);
    border-radius: var(--border-radius);
}

.post-content {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text);
}

.post-content h2 {
    font-size: 1.875rem;
    font-weight: 700;
    margin: var(--spacing-lg) 0 var(--spacing-md) 0;
    color: var(--primary);
}

.post-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: var(--spacing-md) 0 var(--spacing-sm) 0;
    color: var(--primary);
}

.post-content p {
    margin-bottom: var(--spacing-md);
}

.post-content ul,
.post-content ol {
    margin: var(--spacing-md) 0 var(--spacing-md) var(--spacing-lg);
}

.post-content li {
    margin-bottom: var(--spacing-xs);
}

.post-content code {
    background: var(--bg-secondary);
    color: var(--accent);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
}

.post-content pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin: var(--spacing-md) 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    border: 1px solid #334155;
}

.post-content pre code {
    background: none;
    color: inherit;
    padding: 0;
}

@media (prefers-color-scheme: dark) {
    .post-content code {
        background: #1e293b;
        color: #60a5fa;
        border: 1px solid #334155;
    }

    .post-content blockquote {
        background: #1e293b;
        color: #cbd5e1;
        border-color: #60a5fa;
    }

    .post-excerpt {
        background: #1e293b;
        border-left-color: #60a5fa;
    }

    .discussion-section {
        background: #1e293b;
        border-left-color: #60a5fa;
    }
}

html[data-theme="dark"] .post-content code {
    background: #1e293b;
    color: #60a5fa;
    border: 1px solid #334155;
}

html[data-theme="dark"] .post-content blockquote {
    background: #1e293b;
    color: #cbd5e1;
    border-color: #60a5fa;
}

html[data-theme="dark"] .post-excerpt {
    background: #1e293b;
    border-left-color: #60a5fa;
}

html[data-theme="dark"] .discussion-section {
    background: #1e293b;
    border-left-color: #60a5fa;
}

.post-content blockquote {
    border-left: 4px solid var(--accent);
    padding-left: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    color: var(--text-secondary);
    font-style: italic;
}

.post-content hr {
    border: none;
    border-top: 2px solid var(--border);
    margin: var(--spacing-xl) 0;
}

.post-content img {
    display: block;
    margin: var(--spacing-md) auto;
    max-width: 100%;
    cursor: zoom-in;
    border-radius: var(--border-radius);
    transition: opacity 0.2s;
}

.post-content img:hover {
    opacity: 0.85;
}

/* Lightbox */
.lightbox-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    z-index: 9999;
    cursor: zoom-out;
    align-items: center;
    justify-content: center;
}

.lightbox-overlay.active {
    display: flex;
}

.lightbox-overlay img {
    max-width: 92vw;
    max-height: 92vh;
    border-radius: var(--border-radius);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.6);
    cursor: zoom-out;
    object-fit: contain;
}

.lightbox-close {
    position: fixed;
    top: 1.25rem;
    right: 1.5rem;
    color: #fff;
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    user-select: none;
    opacity: 0.8;
    transition: opacity 0.15s;
}

.lightbox-close:hover {
    opacity: 1;
}

.post-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--border);
}

.discussion-section {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-left: 4px solid var(--accent);
    border-radius: var(--border-radius);
}

.discussion-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 var(--spacing-md) 0;
    color: var(--primary);
}

.discussion-item {
    margin-bottom: var(--spacing-md);
}

.discussion-item strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text);
}

.discussion-item ul {
    margin: 0;
    padding-left: var(--spacing-lg);
}

.discussion-item li {
    margin-bottom: var(--spacing-xs);
}

.discussion-item a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.discussion-item a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.back-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
}

.back-link:hover {
    color: var(--accent-hover);
    transform: translateX(-4px);
}

/* Footer */
.site-footer {
    background: #f8fafc;
    color: #0f172a;
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    margin-top: auto;
    border-top: 2px solid transparent;
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--accent) 35%,
        var(--accent) 65%,
        transparent 100%);
    opacity: 0.6;
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
}

.site-footer p {
    margin: var(--spacing-xs) 0;
    font-size: 0.95rem;
}

.footer-desc {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Dark mode footer override */
@media (prefers-color-scheme: dark) {
    .site-footer {
        background: #0f172a;
        color: #cbd5e1;
    }
}

html[data-theme="dark"] .site-footer {
    background: #0f172a;
    color: #cbd5e1;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero-desc {
        font-size: 0.95rem;
        white-space: normal;
        max-width: 600px;
    }

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

    .post-title {
        font-size: 1.875rem;
    }

    /* Header Responsive */
    .site-nav {
        padding: var(--spacing-sm) var(--spacing-md);
        justify-content: space-between;
        gap: var(--spacing-sm);
        flex-wrap: nowrap;
    }

    .nav-brand {
        flex-shrink: 0;
        display: flex;
        align-items: center;
    }

    .nav-brand a,
    .nav-brand button {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }

    .nav-brand a:hover,
    .nav-brand button:hover {
        transform: scale(1.02);
    }

    .nav-links {
        gap: var(--spacing-sm);
        flex-wrap: nowrap;
        justify-content: flex-end;
        flex-shrink: 0;
    }

    .nav-link {
        font-size: 0.85rem;
        padding: 0.5rem 0.75rem;
        white-space: nowrap;
    }

    .site-content {
        padding: var(--spacing-md);
    }
}

/* Extra Small Screens */
@media (max-width: 480px) {
    .site-nav {
        padding: var(--spacing-xs) var(--spacing-sm);
        gap: 0.5rem;
        flex-wrap: nowrap;
    }

    .nav-brand a,
    .nav-brand button {
        width: 28px;
        height: 28px;
        font-size: 0.75rem;
    }

    .nav-links {
        gap: 0.375rem;
        flex-wrap: nowrap;
    }

    .nav-link {
        font-size: 0.75rem;
        padding: 0.25rem 0.5rem;
        white-space: nowrap;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero-desc {
        font-size: 0.8rem;
        white-space: normal;
        max-width: 100%;
    }

    .post-title {
        font-size: 1.5rem;
    }

    .site-content {
        padding: var(--spacing-sm);
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.article-card {
    animation: fadeIn 0.5s ease forwards;
}

.article-card:nth-child(1) { animation-delay: 0.05s; }
.article-card:nth-child(2) { animation-delay: 0.1s; }
.article-card:nth-child(3) { animation-delay: 0.15s; }
.article-card:nth-child(4) { animation-delay: 0.2s; }
.article-card:nth-child(5) { animation-delay: 0.25s; }
.article-card:nth-child(6) { animation-delay: 0.3s; }

/* Author Bio */
.author-bio {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    align-items: center;
}

.author-bio-content {
    display: flex;
    gap: var(--spacing-lg);
    width: 100%;
    align-items: flex-start;
}

.author-avatar {
    flex-shrink: 0;
}

.avatar-placeholder {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.5rem;
}

.author-info {
    flex: 1;
}

.author-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.author-info p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.author-links {
    display: flex;
    gap: var(--spacing-md);
}

.author-links a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s;
    border: 1px solid var(--accent);
    padding: 0.375rem 0.875rem;
    border-radius: 4px;
}

.author-links a:hover {
    background: var(--accent);
    color: var(--bg);
}

@media (max-width: 768px) {
    .author-bio-content {
        flex-direction: column;
        text-align: center;
    }

    .avatar-placeholder {
        margin: 0 auto;
    }

    .author-links {
        justify-content: center;
        flex-wrap: wrap;
    }
}