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

:root {
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-muted: #6b7280;
    --color-accent: #2563eb;
    --font-sans: system-ui, -apple-system, sans-serif;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Nav */
header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid #e5e7eb;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-accent);
    text-decoration: none;
    letter-spacing: -0.02em;
}

/* Hero */
main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero {
    text-align: center;
    padding: 4rem 2rem;
}

.hero h1 {
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    color: var(--color-muted);
}

/* Footer */
footer {
    padding: 1.5rem 2rem;
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-muted);
    border-top: 1px solid #e5e7eb;
}