:root {
    color-scheme: light dark;
    --bg-color: #0d1117;
    --text-color: #d0d7de;
    --accent: #1f6feb;
    --accent-hover: #388bfd;
    --muted: #8b949e;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg-color: #f8fafc;
        --text-color: #0f172a;
        --muted: #475569;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "SUIT", "-apple-system", BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
}

.not-found {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}

.content {
    text-align: center;
    max-width: 32rem;
}

.code {
    font-size: 5rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
}

h1 {
    margin: 0 0 1rem;
    font-size: 1.75rem;
}

.description {
    margin: 0 0 2rem;
    color: var(--muted);
}

.back-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 1.8rem;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    background: var(--accent);
    color: #fff;
    transition: background 0.2s ease;
}

.back-button:hover {
    background: var(--accent-hover);
}