body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f2f5;
    margin: 0;
    color: #333;
}

.container {
    background-color: #ffffff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 100%;
    max-width: 500px;
}

h1 {
    color: #c4302b; /* YouTube red */
    margin-bottom: 30px;
    font-size: 2em;
}

.input-group {
    display: flex;
    margin-bottom: 20px;
    gap: 10px; /* Space between input and button */
}

input[type="text"] {
    flex-grow: 1;
    padding: 12px 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
    outline: none;
    transition: border-color 0.3s;
}

input[type="text"]:focus {
    border-color: #c4302b;
}

button {
    padding: 12px 25px;
    background-color: #c4302b; /* YouTube red */
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #a32824; /* Darker red on hover */
}

.hidden {
    display: none;
}

#message {
    margin-top: 20px;
    padding: 10px;
    border-radius: 5px;
    font-weight: bold;
}

.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}