body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
    background: #f4f6f8;
    color: #333;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh;
}

.navbar {
    width: 100%;
    background: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-list {
    display: flex;
    justify-content: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    margin: 0 15px;
}

.nav-link {
    display: block;
    padding: 15px 10px;
    color: #333;
    text-decoration: none;
    position: relative;
    font-weight: bold;
    transition: color 0.3s;
}

.nav-link::after {
    content: '';
    display: block;
    width: 0;
    height: 2px;
    background: #667eea;
    transition: width 0.3s;
    position: absolute;
    bottom: 0;
    left: 0;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link:hover {
    color: #667eea;
}

.container {
    text-align: center;
    padding: 40px;
    border: none;
    border-radius: 15px;
    background: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    width: 100%;
    margin-top: 20px;
}

h1 {
    margin-bottom: 20px;
    font-size: 2.5em;
    color: #333;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
}

.joke-container {
    padding: 20px;
    background: #f9f9fb;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: inset 0 4px 8px rgba(0, 0, 0, 0.05);
    font-size: 1.2em;
    color: #555;
}

#joke {
    line-height: 1.6em;
}

button {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1em;
    border-radius: 30px;
    cursor: pointer;
    transition: background 0.3s, transform 0.3s;
    margin-top: 20px; /* Add margin to separate the button from the joke container */
}

button:hover {
    background: linear-gradient(135deg, #764ba2, #667eea);
    transform: translateY(-3px);
}

button:active {
    transform: translateY(1px);
}