:root {
    --bg: #ffffff;
    --fg: #111;
    --muted: #555;
    --accent: #cc0000;
    --border: #e5e5e5;
    --surface: #fafafa;
}

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

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

.landing {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.nav {
    padding: 20px 32px;
}

.nav-brand {
    text-decoration: none;
}

.hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 32px 60px;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.03em;
    line-height: 1.1;
    max-width: 600px;
}

.hero-sub {
    font-size: 1.125rem;
    color: var(--muted);
    max-width: 520px;
    margin-bottom: 56px;
    line-height: 1.7;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 780px;
    width: 100%;
}

.feature {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 28px 24px;
    text-align: left;
}

.feature strong {
    display: block;
    margin-bottom: 8px;
    font-size: 0.95rem;
    color: var(--fg);
    letter-spacing: -0.01em;
}

.feature span {
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer {
    padding: 20px 32px;
    text-align: center;
    color: var(--muted);
    font-size: 0.8rem;
    letter-spacing: 0.02em;
}

@media (max-width: 720px) {
    .hero { padding: 48px 24px 40px; }
    .hero h1 { font-size: 2rem; }
    .hero-sub { font-size: 1rem; }
    .hero-features { grid-template-columns: 1fr; max-width: 400px; }
}