:root {
    --color-bg: #fafaf8;
    --color-fg: #1a1a1a;
    --color-muted: #6b6b6b;
    --color-accent: #2563eb;
    --color-border: #e5e5e0;
    --color-card: #ffffff;
    --max-width: 920px;
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--color-fg);
    background: var(--color-bg);
    line-height: 1.6;
    font-size: 17px;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

header {
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-weight: 600;
    font-size: 18px;
    letter-spacing: -0.01em;
}

nav a {
    color: var(--color-muted);
    text-decoration: none;
    margin-left: 24px;
    font-size: 15px;
}

nav a:hover {
    color: var(--color-fg);
}

.hero {
    padding: 80px 0 60px;
}

.hero h1 {
    font-size: 56px;
    font-weight: 600;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    line-height: 1.05;
}

.lede {
    font-size: 21px;
    color: var(--color-muted);
    max-width: 600px;
    margin-bottom: 32px;
}

.cta {
    margin-top: 8px;
}

.btn-primary {
    display: inline-block;
    background: var(--color-fg);
    color: var(--color-bg);
    padding: 14px 28px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
}

.btn-primary:hover {
    opacity: 0.9;
}

.features, .install, .data-source {
    padding: 60px 0;
    border-top: 1px solid var(--color-border);
}

h2 {
    font-size: 32px;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 32px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 600px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
    .hero h1 {
        font-size: 40px;
    }
    .lede {
        font-size: 18px;
    }
}

.card, .install-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    padding: 24px;
    border-radius: var(--radius);
}

.card h3, .install-card h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
}

.card p, .install-card p {
    color: var(--color-muted);
    font-size: 15px;
}

.install-card code {
    display: inline-block;
    margin-top: 12px;
    background: #f3f3f0;
    padding: 6px 10px;
    border-radius: 4px;
    font-family: "SF Mono", Menlo, Consolas, monospace;
    font-size: 14px;
}

.install-card .link-future {
    display: inline-block;
    margin-top: 12px;
    color: var(--color-muted);
    font-size: 14px;
    font-style: italic;
}

.data-source p {
    color: var(--color-muted);
    max-width: 600px;
}

.data-source a {
    color: var(--color-accent);
}

footer {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
    color: var(--color-muted);
    font-size: 14px;
}

footer p {
    margin-bottom: 8px;
}

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

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