* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Courier New', Courier, monospace;
    transition: background-color 0.3s, color 0.3s;
}

body.dark-theme {
    background-color: #0f0f0f;
    color: #00ffcc;
}

body.light-theme {
    background-color: #f0f0f0;
    color: #333;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #1b1b1b;
    padding: 20px;
    border-bottom: 2px solid #00ffcc;
    transition: background-color 0.3s;
}

body.light-theme header {
    background-color: #ddd;
    border-bottom: 2px solid #333;
}

.avatar img {
    border-radius: 50%;
    width: 50px;
}

.title {
    font-size: 24px;
    font-weight: bold;
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: inherit;
    text-decoration: none;
    font-size: 18px;
}

nav ul li a:hover {
    text-decoration: underline;
}

main {
    padding: 20px;
}

section {
    margin-bottom: 40px;
    opacity: 0;
    transition: opacity 0.6s ease-in-out;
}

.active-section {
    opacity: 1;
}

.hidden-section {
    display: none;
}

h2 {
    font-size: 28px;
    border-bottom: 2px solid;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.game {
    margin-bottom: 15px;
}

.game h3 {
    font-size: 22px;
}

a {
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

footer {
    text-align: center;
    padding: 10px 0;
    background: #1b1b1b;
    border-top: 2px solid #00ffcc;
    position: fixed;
    width: 100%;
    bottom: 0;
}

button#theme-toggle {
    background: none;
    border: none;
    color: inherit;
    font-size: 16px;
    cursor: pointer;
    padding: 10px 20px;
    transition: color 0.3s;
}

button#theme-toggle:hover {
    text-decoration: underline;
}

body.light-theme footer {
    background-color: #ddd;
    border-top: 2px solid #333;
}