:root {
    --bg-light: #f5f5f5;
    --text-light: #222;
    --bg-dark: #121212;
    --text-dark: #eee;
    --accent: #007acc;
}

body {
    margin: 0;
    font-family: system-ui, sans-serif;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition:
        background 0.3s,
        color 0.3s;
    font-size: clamp(1.2rem, 2vw, 1.8rem);
}

header {
    position: fixed;
    top: 0;
    width: 40%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    font-weight: 600;
}

main {
    width: 40%;
    text-align: center;
    line-height: 1.6;
}

section {
    margin-top: 2rem;
    padding-top: 8vh;
}

a {
    color: var(--accent);
    text-decoration: none;
}

#toggle-theme {
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: inherit;
    transition: transform 0.3s;
}

#toggle-theme:hover {
    transform: scale(1.2);
}

#fingerprint {
    cursor: pointer;
    user-select: none;
    border-bottom: 1px dashed currentColor;
}

.dark {
    background: var(--bg-dark);
    color: var(--text-dark);
}

.light {
    background: var(--bg-light);
    color: var(--text-light);
}

@media (max-width: 800px) {
    header,
    main {
        width: 90%;
    }
}