:root {
    --bg: #0f1115;
    --fg: #e6e6e6;
    --accent: #5b9dff;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--fg);
}

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

h1 {
    font-size: 3rem;
    margin: 0 0 1rem;
    letter-spacing: -0.02em;
}

.hint { color: #9aa0a6; }

a { color: var(--accent); }

code {
    background: rgba(255, 255, 255, 0.08);
    padding: 0.15em 0.4em;
    border-radius: 4px;
}