/* ================================================
   DESIGN TOKENS — matches abdulmalik.de portfolio
   ================================================ */
:root {
    --bg-primary: #0a1929;
    --bg-secondary: #132f4c;
    --bg-card: #1e3a5f;
    --text-primary: #e3f2fd;
    --text-secondary: #d8eaf8;
    --accent: #1976d2;
    --accent-light: #42a5f5;
    --accent-bg: rgba(25, 118, 210, 0.1);
    --border: rgba(25, 118, 210, 0.2);
    --tag-bg: rgba(25, 118, 210, 0.15);
    --tag-text: #90caf9;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --radius: 8px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Category colours */
    --color-projects: #1976d2;
    --color-articles: #7b1fa2;
    --color-job-prep: #e65100;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7fa;
    --bg-card: #ffffff;
    --text-primary: #0d1b2a;
    --text-secondary: #2d4a6a;
    --accent: #1976d2;
    --accent-light: #1565c0;
    --accent-bg: rgba(25, 118, 210, 0.06);
    --border: rgba(25, 118, 210, 0.15);
    --tag-bg: rgba(25, 118, 210, 0.08);
    --tag-text: #1565c0;
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
}

/* ================================================
   RESET & BASE
   ================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
}

a { color: var(--accent-light); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

/* ================================================
   SPOTLIGHT (same as portfolio)
   ================================================ */
.spotlight {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    pointer-events: none;
    z-index: 0;
    background: radial-gradient(600px circle at var(--x, 50%) var(--y, 50%),
        rgba(25, 118, 210, 0.06), transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}
.spotlight.active { opacity: 1; }

/* ================================================
   THEME TOGGLE (identical to portfolio)
   ================================================ */
.theme-toggle {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 1000;
    display: flex;
    gap: 0.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 0.25rem;
    box-shadow: var(--shadow);
}
.theme-toggle button {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.75rem;
    border: none;
    border-radius: 16px;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}
.theme-toggle button.active {
    background: var(--accent);
    color: #fff;
}
.theme-toggle button:not(.active):hover {
    background: var(--accent-bg);
    color: var(--text-primary);
}

/* ================================================
   SITE HEADER
   ================================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
    background: rgba(10, 25, 41, 0.92);
}
[data-theme="light"] .site-header {
    background: rgba(255, 255, 255, 0.92);
}
.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}
.site-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    white-space: nowrap;
}
.site-logo:hover { text-decoration: none; }
.logo-name { color: var(--text-primary); }
.logo-divider { color: var(--text-secondary); font-weight: 300; }
.logo-blog { color: var(--accent-light); }

.site-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}
.site-nav .nav-link {
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
    text-decoration: none;
    position: relative;
}
.site-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0.8rem;
    right: 0.8rem;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transition: transform 0.2s ease;
}
.site-nav .nav-link:hover,
.site-nav .nav-link.active {
    color: var(--text-primary);
    background: var(--accent-bg);
    text-decoration: none;
}
.site-nav .nav-link.active::after { transform: scaleX(1); }
.site-nav .nav-link--portfolio {
    color: var(--accent-light);
    border: 1px solid var(--border);
    margin-left: 0.5rem;
}
.site-nav .nav-link--portfolio:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* ================================================
   MAIN CONTENT WRAPPER
   ================================================ */
.main-content {
    position: relative;
    z-index: 1;
    min-height: calc(100vh - 140px);
}
.blog-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* ================================================
   HERO
   ================================================ */
.blog-hero {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 2rem;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}
.blog-hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}
.blog-hero p {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 500px;
    line-height: 1.7;
}
.back-to-portfolio {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    white-space: nowrap;
    text-decoration: none;
    transition: all 0.2s ease;
    flex-shrink: 0;
    align-self: flex-start;
    margin-top: 0.5rem;
}
.back-to-portfolio:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    text-decoration: none;
}

/* ================================================
   CATEGORY FILTER
   ================================================ */
.category-filter {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}
.filter-btn {
    padding: 0.4rem 1rem;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
}
.filter-btn:hover { background: var(--accent-bg); color: var(--text-primary); }
.filter-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* ================================================
   POST GRID
   ================================================ */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

/* ================================================
   POST CARD
   ================================================ */
.post-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    position: relative;
}
.post-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-bg);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}
.post-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}
.post-card:hover::before { opacity: 1; }

.post-card-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
}
.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(1.04); }

.post-card-content {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    position: relative;
}
.post-card-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}
.post-category {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
}
.post-category--projects { background: rgba(25,118,210,0.15); color: #90caf9; }
.post-category--articles { background: rgba(123,31,162,0.15); color: #ce93d8; }
.post-category--job-prep { background: rgba(230,81,0,0.15); color: #ffab91; }

.post-date, .post-read-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
}
.post-card-title {
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-primary);
}
.post-card-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}
.post-card-title a:hover { color: var(--accent-light); text-decoration: none; }
.post-card-title a::after {
    content: '';
    position: absolute;
    inset: 0;
}
.post-card-excerpt {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
}
.post-card--small .post-card-title { font-size: 0.95rem; }

/* ================================================
   TAGS
   ================================================ */
.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}
.tag {
    background: var(--tag-bg);
    color: var(--tag-text);
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-weight: 500;
}

/* ================================================
   PAGINATION
   ================================================ */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}
.pagination-btn {
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-decoration: none;
    transition: all 0.2s ease;
}
.pagination-btn:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    text-decoration: none;
}
.pagination-info { color: var(--text-secondary); font-size: 0.875rem; }

/* ================================================
   POST PAGE
   ================================================ */
.post-container {
    max-width: 860px;
    margin: 0 auto;
    padding: 2rem 2rem 4rem;
    position: relative;
    z-index: 1;
}
.post-back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-decoration: none;
    margin-bottom: 2rem;
    transition: color 0.2s ease;
}
.post-back-link:hover { color: var(--accent-light); text-decoration: none; }

.post-header { margin-bottom: 2rem; }
.post-header-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}
.post-title {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}
.post-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}
.post-hero-image {
    width: 100%;
    height: 380px;
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 2.5rem;
    border: 1px solid var(--border);
}
.post-hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ================================================
   POST BODY (typography)
   ================================================ */
.post-body {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-primary);
}
.post-body h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin: 2.5rem 0 1rem;
    color: var(--text-primary);
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}
.post-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 2rem 0 0.75rem;
    color: var(--text-primary);
}
.post-body h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 1.5rem 0 0.5rem;
    color: var(--accent-light);
}
.post-body p { margin-bottom: 1.25rem; }
.post-body a { color: var(--accent-light); }
.post-body a:hover { text-decoration: underline; }
.post-body strong { font-weight: 600; color: var(--text-primary); }
.post-body em { font-style: italic; color: var(--text-primary); }
.post-body ul, .post-body ol {
    margin: 0 0 1.25rem 1.5rem;
    color: var(--text-primary);
}
.post-body li { margin-bottom: 0.4rem; }
.post-body blockquote {
    border-left: 3px solid var(--accent);
    padding: 0.75rem 1.25rem;
    margin: 1.5rem 0;
    background: var(--accent-bg);
    border-radius: 0 var(--radius) var(--radius) 0;
    color: var(--text-primary);
    font-style: italic;
}
.post-body code {
    font-family: 'Consolas', 'Monaco', 'Fira Code', monospace;
    font-size: 0.875em;
    background: var(--bg-secondary);
    color: var(--accent-light);
    padding: 0.15em 0.4em;
    border-radius: 3px;
    border: 1px solid var(--border);
}
.post-body pre {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    overflow-x: auto;
    margin: 1.5rem 0;
}
.post-body pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.875rem;
    color: var(--text-primary);
}
.post-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
}
.post-body th {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 600;
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 2px solid var(--border);
}
.post-body td {
    padding: 0.65rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}
.post-body tr:hover td { background: var(--accent-bg); }
.post-body hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2.5rem 0;
}

/* ================================================
   POST FOOTER / AUTHOR
   ================================================ */
.post-footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}
.post-author {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
}
.post-author-info {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}
.post-author-info strong { color: var(--text-primary); font-size: 0.95rem; }
.post-author-info span { color: var(--text-secondary); font-size: 0.825rem; }
.post-author-links {
    display: flex;
    gap: 0.75rem;
}
.post-author-links a {
    color: var(--text-secondary);
    font-size: 0.825rem;
    text-decoration: none;
    transition: color 0.2s ease;
}
.post-author-links a:hover { color: var(--accent-light); }

/* ================================================
   RELATED POSTS
   ================================================ */
.related-posts { margin-top: 3rem; }
.related-posts h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-size: 0.8rem;
}
.related-posts-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* ================================================
   FOOTER
   ================================================ */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 2rem;
    position: relative;
    z-index: 1;
}
.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.footer-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}
.footer-left a { color: var(--text-secondary); text-decoration: none; }
.footer-left a:hover { color: var(--accent-light); }
.footer-divider { opacity: 0.4; }
.footer-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.footer-right a {
    color: var(--text-secondary);
    transition: color 0.2s ease;
    display: flex;
}
.footer-right a:hover { color: var(--accent-light); }

/* ================================================
   SYNTAX HIGHLIGHTING (Rouge) — dark mode
   ================================================ */
.highlight .c, .highlight .c1, .highlight .cm { color: #9ab3c5; }
.highlight .k, .highlight .kd, .highlight .kn { color: #f97583; }
.highlight .s, .highlight .s1, .highlight .s2 { color: #9ecbff; }
.highlight .n, .highlight .nx { color: #e1e4e8; }
.highlight .mi, .highlight .mf { color: #79b8ff; }
.highlight .nf { color: #b392f0; }
.highlight .o { color: #f97583; }
.highlight .p { color: #e1e4e8; }

/* Syntax highlighting — light mode overrides */
[data-theme="light"] .highlight .c,
[data-theme="light"] .highlight .c1,
[data-theme="light"] .highlight .cm { color: #6a737d; }
[data-theme="light"] .highlight .k,
[data-theme="light"] .highlight .kd,
[data-theme="light"] .highlight .kn { color: #d73a49; }
[data-theme="light"] .highlight .s,
[data-theme="light"] .highlight .s1,
[data-theme="light"] .highlight .s2 { color: #032f62; }
[data-theme="light"] .highlight .n,
[data-theme="light"] .highlight .nx  { color: #24292e; }
[data-theme="light"] .highlight .mi,
[data-theme="light"] .highlight .mf  { color: #005cc5; }
[data-theme="light"] .highlight .nf  { color: #6f42c1; }
[data-theme="light"] .highlight .o   { color: #d73a49; }
[data-theme="light"] .highlight .p   { color: #24292e; }

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 768px) {
    .header-inner { padding: 0.75rem 1rem; }
    .site-nav .nav-link { padding: 0.35rem 0.5rem; font-size: 0.8rem; }
    .site-nav .nav-link--portfolio { display: none; }
    .blog-container { padding: 2rem 1rem; }
    .blog-hero { flex-direction: column; gap: 1rem; }
    .blog-hero h1 { font-size: 1.75rem; }
    .back-to-portfolio { align-self: flex-start; }
    .posts-grid { grid-template-columns: 1fr; }
    .post-container { padding: 1.5rem 1rem 3rem; }
    .post-title { font-size: 1.6rem; }
    .post-hero-image { height: 220px; }
    .post-author { flex-direction: column; align-items: flex-start; }
    .related-posts-grid { grid-template-columns: 1fr; }
    .theme-toggle { top: 1rem; right: 1rem; }
    .footer-inner { flex-direction: column; gap: 0.75rem; text-align: center; }
}

@media (max-width: 480px) {
    .site-logo { font-size: 0.85rem; }
    .logo-divider, .logo-blog { display: none; }
    .blog-hero h1 { font-size: 1.5rem; }
}