:root {
    --bg: #0a0e17;
    --bg-card: #111827;
    --bg-card-hover: #1a2332;
    --text: #e4e8f0;
    --text-secondary: #8892a4;
    --accent: #36d1c4;
    --accent-2: #4facfe;
    --accent-glow: rgba(54, 209, 196, 0.15);
    --border: rgba(255, 255, 255, 0.06);
    --border-accent: rgba(54, 209, 196, 0.2);
    --code-bg: #151d2b;
    --gradient-primary: linear-gradient(135deg, #36d1c4 0%, #4facfe 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(54, 209, 196, 0.1) 0%, rgba(79, 172, 254, 0.05) 100%);
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    font-size: 17px;
    line-height: 1.7;
    max-width: 780px;
    margin: 0 auto;
    padding: 0 1.5rem;
    min-height: 100vh;
}

/* Subtle grid background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle at 1px 1px, rgba(54, 209, 196, 0.03) 1px, transparent 0);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: -1;
}

/* ---- HEADER ---- */
header {
    padding: 3rem 0 2rem;
    margin-bottom: 2rem;
    position: relative;
}

.header-row {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    margin-bottom: 0.8rem;
}

.avatar {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    border: 2px solid var(--border-accent);
    box-shadow: 0 0 20px var(--accent-glow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px var(--accent-glow), 0 0 60px rgba(54, 209, 196, 0.08);
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

header h1 a {
    color: var(--text);
    text-decoration: none;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0 0 1.2rem 0;
    max-width: 500px;
}

nav {
    display: flex;
    gap: 0.5rem;
    font-size: 0.85rem;
    flex-wrap: wrap;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.35rem 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
    background: transparent;
}

nav a:hover {
    color: var(--accent);
    border-color: var(--border-accent);
    background: var(--accent-glow);
}

.header-divider {
    height: 1px;
    background: linear-gradient(90deg, var(--border-accent), transparent 80%);
    margin-top: 1.5rem;
}

/* ---- MAIN ---- */
main {
    margin-bottom: 4rem;
}

/* ---- POST CARDS ---- */
.post-preview {
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
}

.post-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.post-preview:hover {
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3), 0 0 40px var(--accent-glow);
}

.post-preview:hover::before {
    opacity: 1;
}

.post-preview time {
    font-size: 0.8rem;
    color: var(--accent);
    font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, monospace;
    letter-spacing: 0.02em;
}

.post-preview h2 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 0.4rem 0 0.5rem 0;
    line-height: 1.35;
}

.post-preview h2 a {
    color: var(--text);
    text-decoration: none;
    transition: color 0.2s;
}

.post-preview h2 a:hover { color: var(--accent); }

.post-preview p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
}

.post-tag {
    display: inline-block;
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    background: var(--accent-glow);
    color: var(--accent);
    margin-top: 0.8rem;
    border: 1px solid var(--border-accent);
}

/* ---- POST PAGE ---- */
.post-header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.post-header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: 0.6rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.post-header time {
    font-size: 0.85rem;
    color: var(--accent);
    font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, monospace;
}

.post-content h2 {
    font-size: 1.35rem;
    font-weight: 600;
    margin: 2.5rem 0 1rem 0;
    color: var(--text);
    position: relative;
    padding-left: 1rem;
}

.post-content h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.2em;
    width: 3px;
    height: 1em;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.post-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 1.8rem 0 0.6rem 0;
    color: var(--text);
}

.post-content p {
    margin: 1.1rem 0;
}

.post-content a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid rgba(54, 209, 196, 0.3);
    transition: border-color 0.2s;
}

.post-content a:hover {
    border-bottom-color: var(--accent);
}

.post-content blockquote {
    border-left: 3px solid var(--accent);
    padding: 1rem 1.5rem;
    margin: 1.8rem 0;
    color: var(--text-secondary);
    font-style: italic;
    background: var(--gradient-subtle);
    border-radius: 0 8px 8px 0;
}

.post-content code {
    font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, monospace;
    font-size: 0.88em;
    background: var(--code-bg);
    color: var(--accent-2);
    padding: 0.2em 0.45em;
    border-radius: 4px;
    border: 1px solid var(--border);
}

.post-content pre {
    background: var(--code-bg);
    padding: 1.2rem 1.5rem;
    border-radius: 10px;
    overflow-x: auto;
    margin: 1.8rem 0;
    border: 1px solid var(--border);
    position: relative;
}

.post-content pre code {
    background: none;
    border: none;
    padding: 0;
    color: var(--text);
}

.post-content ul, .post-content ol {
    margin: 1.1rem 0;
    padding-left: 1.5rem;
}

.post-content li {
    margin: 0.5rem 0;
}

.post-content li::marker {
    color: var(--accent);
}

.post-content strong {
    font-weight: 600;
    color: var(--text);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 2rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: all 0.2s;
}

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

/* ---- FOOTER ---- */
footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.83rem;
    text-align: center;
}

footer a {
    color: var(--accent);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* ---- ABOUT PAGE ---- */
.about-hero {
    text-align: center;
    padding: 2rem 0 3rem;
}

.about-hero .avatar {
    width: 100px;
    height: 100px;
    border-radius: 24px;
    margin-bottom: 1rem;
}

.about-hero h1 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-content {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 600px) {
    body { padding: 0 1rem; }
    header h1 { font-size: 1.6rem; }
    .post-header h1 { font-size: 1.6rem; }
    .post-preview { padding: 1.2rem; }
    .avatar { width: 48px; height: 48px; border-radius: 12px; }
    .about-hero .avatar { width: 80px; height: 80px; }
}

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

main { animation: fadeIn 0.4s ease; }
header { animation: fadeIn 0.3s ease; }