:root {
    --bg: #f4f4f4;
    --text: #111;
    --card: white;
    --btn: #0066cc;
    --btn-hover: #004d99;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111;
        --text: #f4f4f4;
        --card: #1e1e1e;
        --btn: #3399ff;
        --btn-hover: #267ac3;
    }
}

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 40px 20px;
    text-align: center;
}

.container {
    max-width: 500px;
    margin: auto;
    background: var(--card);
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

img.avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 20px;
}

h1 {
    font-size: 24px;
    margin-bottom: 8px;
}

p.bio {
    font-size: 15px;
    margin-bottom: 10px;
}

a.link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background-color: var(--btn);
    color: white;
    padding: 14px;
    margin: 10px 0;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s;
}

a.link:hover {
    background-color: var(--btn-hover);
}