main {
    text-align: center;
    margin: 50px auto;
    padding: 20px;
    background-color: rgb(241, 241, 241);
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.215);
    width: 80%;
    max-width: 600px;
}

main h1 {
    font-size: 2em;
    margin-bottom: 20px;
}

.form-container {
    margin-bottom: 20px;
}

button {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background-color: #45a049;
}

.output-container {
    font-size: 1.2em;
    margin-top: 20px;
}

.color-box {
    width: 150px;
    height: 150px;
    margin: 20px auto;
    border-radius: 8px;
}

.copy-btn {
    padding: 5px 10px;
    margin-left: 10px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.copy-btn:hover {
    background-color: #2980b9;
}

button:focus, .copy-btn:focus {
    outline: none;
}