:root {
    --bg-dark: #0a0a0a;
    --bg-card: #111213;
    --accent-green: #3fb950;
    --text-primary: #d6d6d6;
    --text-muted: #888888;
    --text-error: #f85149;
    --border: #222;
    --font-mono: 'SF Mono', 'Fira Code', 'JetBrains Mono', 'Cascadia Code', monospace;
}

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

body {
    background: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 15px;
    line-height: 1.6;
    min-height: 100vh;
}

main {
    max-width: 640px;
    margin: 0 auto;
    padding: 4rem 1.5rem;
}

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

a:hover {
    text-decoration: underline;
}

.back-link {
    display: inline-block;
    margin-bottom: 2rem;
    color: var(--text-muted);
}

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

.accent {
    color: var(--accent-green);
}

/* Landing */
.landing {
    max-width: none;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: 0;
}

.hero-centered {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
}

.hero-centered h1 {
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.tagline {
    color: var(--text-muted);
    font-size: clamp(0.85rem, 2vw, 1rem);
}

.landing footer {
    text-align: center;
    padding: 2rem;
    border-top: none;
}

/* About */
.about-section {
    margin-bottom: 2.5rem;
}

.about-section h2 {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    color: var(--accent-green);
}

.about-section p {
    margin-bottom: 0.8rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.about-section ol,
.about-section ul {
    padding-left: 1.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.about-section li {
    margin-bottom: 0.4rem;
}

.about-section code {
    background: var(--bg-card);
    padding: 0.15rem 0.4rem;
    border: 1px solid var(--border);
    color: var(--accent-green);
    font-size: 0.85rem;
}

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding-top: 2rem;
    color: var(--text-muted);
    font-size: 0.8rem;
}

footer a {
    color: var(--text-muted);
}

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