:root {
    --background-light: #fff;
    --background-dark: #000;
    --text-light: #000;
    --text-dark: #fff;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    transition: background-color 0.3s, color 0.3s;
    background-color: var(--background-light);
    color: var(--text-light);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    flex-direction: column;
}

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

header {
    position: absolute;
    top: 20px;
    left: 20px;
    font-weight: bold;
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 24px;
}

h1 {
    font-size: 2em;
    font-weight: bold;
}

.social-icons {
    margin-top: 20px;
}

.social-icons a {
    margin: 0 10px;
    font-size: 24px;
    text-decoration: none;
    color: inherit;
}