* {
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f5f7fa;
    margin: 0;
    min-height: 100vh;

    display: flex;
    justify-content: center;
    align-items: flex-start;

    padding-top: 120px;
}

.container {
    background-color: white;
    width: 100%;
    max-width: 420px;

    padding: 30px;
    border-radius: 12px;

    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);

    text-align: center;
}

h1 {
    margin-top: 0;
    margin-bottom: 25px;
    color: #333;
}

#join-chat {
    display: flex;
    gap: 10px;
}

input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
}

input:focus {
    outline: none;
    border-color: #3b82f6;
}

button {
    border: none;
    border-radius: 8px;
    background-color: #3b82f6;
    color: white;
    padding: 10px 14px;
    cursor: pointer;
}

button:hover {
    background-color: #2563eb;
}

#error {
    color: red;
    margin-top: 15px;
    min-height: 20px;
}