body {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #eef2f7;
}

.container {
    max-width: 750px;
    margin: 40px auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 30px;
}

#messages {
    height: 350px;
    overflow-y: auto;
    border: 1px solid #ddd;
    border-radius: 8px;
    background: #fafafa;
    padding: 15px;
    margin-bottom: 20px;
}

#messages p {
    margin: 0 0 12px;
    padding: 12px;
    background: white;
    border-radius: 8px;
    border-left: 4px solid #3498db;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
}

form {
    display: flex;
    gap: 10px;
}

input {
    flex: 1;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 15px;
}

input:focus {
    outline: none;
    border-color: #3498db;
}

button {
    background: #3498db;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
}

button:hover {
    background: #2980b9;
}

#status {
    margin-top: 15px;
    text-align: center;
    font-weight: bold;
    min-height: 20px;
}

small {
    color: #777;
    margin-left: 8px;
}