:root {
    --primary: #171717;
    --cta: #171717;
    --bg: #ffffff;
    --text: #171717;
    --text-light: #666666;
    --accent: #0070f3;
    --font: 'Inter', -apple-system, sans-serif;
    --radius: 6px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --max-width: 900px;
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
header { padding: 1.5rem 0; }
header .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-weight: 700; font-size: 1.25rem; color: var(--primary); text-decoration: none; }
nav a { color: var(--text-light); text-decoration: none; margin-left: 1.5rem; font-size: 0.9rem; }
nav a:hover { color: var(--cta); }
main { flex: 1; padding: 3rem 0; }
h1 { font-size: 2rem; margin-bottom: 1rem; }
p { color: var(--text-light); margin-bottom: 1.5rem; }
.btn {
    display: inline-block; padding: 0.75rem 1.5rem;
    background: var(--cta); color: #fff; border-radius: var(--radius);
    text-decoration: none; font-weight: 600; font-size: 0.9rem;
    transition: opacity 0.2s;
}
.btn:hover { opacity: 0.9; }
footer { padding: 2rem 0; text-align: center; font-size: 0.85rem; color: var(--text-light); border-top: 1px solid rgba(0,0,0,0.05); }
@media (max-width: 640px) { h1 { font-size: 1.5rem; } nav a { margin-left: 1rem; } }