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

:root {
    --bg: #0a0f1e;
    --bg-2: #0f1629;
    --bg-card: #131c30;
    --accent: #38bdf8;
    --accent-2: #818cf8;
    --accent-dim: rgba(56, 189, 248, 0.08);
    --accent-b: rgba(56, 189, 248, 0.2);
    --green: #34d399;
    --text: #e2e8f0;
    --text-2: #94a3b8;
    --text-3: #475569;
    --border: rgba(255, 255, 255, 0.06);
    --r: 12px;
    --font: "Inter", -apple-system, sans-serif;
    --mono: "JetBrains Mono", "Fira Code", monospace;
    --max: 760px;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* Nav */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 15, 30, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--mono);
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text);
}

.nav-logo span { color: var(--accent); }

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--text-2);
    transition: color 0.2s;
}

.nav-links a:hover { color: var(--text); }

.nav-links .nav-cta {
    color: var(--accent);
    border: 1px solid var(--accent-b);
    padding: 0.35rem 0.9rem;
    border-radius: 6px;
    transition: background 0.2s, color 0.2s;
}

.nav-links .nav-cta:hover {
    background: var(--accent-dim);
    color: var(--accent);
}

/* Main areas */
.blog-main,
.post-main {
    flex: 1;
    padding: 4rem 1.5rem 6rem;
}

.blog-container,
.post-container {
    max-width: var(--max);
    margin: 0 auto;
}

/* Blog index header */
.blog-header { margin-bottom: 3rem; }

.blog-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.blog-subtitle {
    font-size: 1rem;
    color: var(--text-2);
}

.empty-state { color: var(--text-2); }

/* Post cards */
.post-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.post-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 1.75rem 2rem;
    transition: border-color 0.2s, transform 0.2s;
}

.post-card:hover {
    border-color: var(--accent-b);
    transform: translateY(-2px);
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.6rem;
}

.post-card-meta time {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--text-3);
}

.post-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
    line-height: 1.35;
}

.post-card-excerpt {
    font-size: 0.9rem;
    color: var(--text-2);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.post-card-cta {
    font-size: 0.82rem;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

/* Tags */
.post-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.tag {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--accent-2);
    background: rgba(129, 140, 248, 0.1);
    border: 1px solid rgba(129, 140, 248, 0.2);
    padding: 0.15rem 0.55rem;
    border-radius: 4px;
}

/* Back link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-2);
    margin-bottom: 2.5rem;
    transition: color 0.2s;
}

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

/* Post header */
.post-header { margin-bottom: 2.5rem; }

.post-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}

.post-meta time {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--text-3);
}

.post-title {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.25;
    color: var(--text);
    margin-bottom: 0.75rem;
}

.post-lead {
    font-size: 1.05rem;
    color: var(--text-2);
    line-height: 1.6;
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
}

/* Prose (post content) */
.prose {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text);
    border-top: 1px solid var(--border);
    padding-top: 2rem;
}

.prose h2 {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--text);
    margin: 2.5rem 0 0.75rem;
}

.prose h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    margin: 2rem 0 0.5rem;
}

.prose p { margin-bottom: 1.25rem; }

.prose a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.prose a:hover { color: var(--text); }

.prose ul,
.prose ol {
    margin: 0 0 1.25rem 1.5rem;
}

.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.4rem; }

.prose strong { color: var(--text); font-weight: 600; }
.prose em { color: var(--text-2); }

.prose hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2.5rem 0;
}

.prose blockquote {
    border-left: 3px solid var(--accent);
    padding: 0.5rem 0 0.5rem 1.25rem;
    color: var(--text-2);
    font-style: italic;
    margin: 1.5rem 0;
}

.prose code {
    font-family: var(--mono);
    font-size: 0.85em;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 0.1em 0.4em;
    border-radius: 4px;
    color: var(--accent);
}

.prose pre {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 1.25rem 1.5rem;
    overflow-x: auto;
    margin: 1.5rem 0;
}

.prose pre code {
    background: none;
    border: none;
    padding: 0;
    color: var(--text);
    font-size: 0.85rem;
}

/* Rouge syntax highlighting */
.highlight { background: var(--bg-card); }
.highlight .c, .highlight .c1, .highlight .cm { color: var(--text-3); font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn { color: var(--accent-2); font-weight: 600; }
.highlight .s, .highlight .s1, .highlight .s2 { color: var(--green); }
.highlight .mi, .highlight .mf { color: #fb923c; }
.highlight .n, .highlight .nf { color: var(--text); }
.highlight .o { color: var(--text-2); }

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 2rem 1.5rem;
    margin-top: auto;
}

.footer-inner {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    text-align: center;
}

.footer-copy { font-size: 0.85rem; color: var(--text-3); }

.footer-socials {
    display: flex;
    gap: 1.25rem;
}

.footer-socials a {
    color: var(--text-3);
    font-size: 1.1rem;
    transition: color 0.2s;
}

.footer-socials a:hover { color: var(--accent); }

.footer-built,
.mono-text {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-3);
}

/* Lightbox */
.lb-trigger {
    cursor: zoom-in;
    transition: opacity 0.2s;
}
.lb-trigger:hover { opacity: 0.85; }

.lb-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.88);
    z-index: 1000;
    padding: 2rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.lb-overlay.lb-visible {
    opacity: 1;
    pointer-events: all;
}

.lb-img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: var(--r);
    box-shadow: 0 8px 48px rgba(0, 0, 0, 0.6);
    object-fit: contain;
}

.lb-caption {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-2);
    text-align: center;
    max-width: 600px;
}

.lb-close {
    position: fixed;
    top: 1.25rem;
    right: 1.5rem;
    background: none;
    border: none;
    color: var(--text-2);
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    transition: color 0.2s;
}
.lb-close:hover { color: var(--text); }

/* Responsive */
@media (max-width: 600px) {
    .blog-title { font-size: 1.75rem; }
    .post-title { font-size: 1.5rem; }
    .post-card { padding: 1.25rem 1.25rem; }
}