*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body{
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    font-family: sans-serif;  
    background-color: #c9c9c9;  
}

.container{
    padding: 2rem;
    background-color: #ffffff;
    border-radius: 20px;
    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
    width: 400px;
}

h2{
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #3498db;
}

form{
    display: flex;
    flex-direction: column;
}

.message{
    padding: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid #d1d1d1;
    border-radius: 5px;
    font-size: 1rem;
    outline: none;
}

.submit{
    font-size: 1rem;
    padding: 0.5rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    color: #ffffff;
    background-color: #3498db;
    transition: background-color 0.3s ease;

}

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

.invalid-message{
    display: none;
    background-color: #e74c3c;
    border-radius: 5px;
    padding: 0.2rem;
    color: #ffffff;
    margin-top: 5px;
}

.message-content{
    font-size: 1.2rem;
    margin-top: 10px;
    color: #2ecc71;
}