body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background: #35424a;
    color: #ffffff;
    padding: 10px 0;
    text-align: center;
}

main {
    max-width: 600px;
    margin: 20px auto;
    background: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

label {
    display: block;
    margin: 15px 0 5px;
}

input[type="text"],
input[type="date"],
input[type="time"],
button {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    background-color: #35424a;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: #45637a;
}

#queue-number {
    margin-top: 20px;
    font-weight: bold;
    color: #35424a;
}