body {
    background-color: #222;
    color: #fff;
    font-family: 'Courier New', Courier, monospace;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

nav li {
    margin: 0 10px;
}

nav a {
    color: #0f0;
    text-decoration: none;
}

button {
    background-color: #0f0;
    color: #222;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
}

#motivational-quotes {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 50px;
    margin-bottom: 50px;
}

#motivational-quotes span {
    font-size: 24px;
    font-weight: bold;
    text-align: center;
    margin: 10px;
}

h1 {
    font-size: 48px;
    text-align: center;
    margin-top: 50px;
}

p {
    font-size: 24px;
    text-align: center;
    margin-bottom: 50px;
}

.challenge-container {
    background-color: #0f0;
    color: #222;
    padding: 50px;
    border-radius: 10px;
    text-align: center;
    margin: 0 auto;
    width: 50%;
}

.challenge-container h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.challenge-container p {
    font-size: 24px;
    margin-bottom: 20px;
}

.challenge-link a {
    background-color: #222;
    color: #0f0;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
}