body {
    font-family: Arial, sans-serif;
    background: #f4f6f9;
    margin: 0;
    padding: 40px 16px;
}

.card {
    max-width: 420px;
    margin: 0 auto;
    background: #fff;
    padding: 24px;
    border-radius: 8px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

label {
    display: block;
    margin-top: 12px;
    margin-bottom: 6px;
}

input {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
}

button, .button {
    display: inline-block;
    margin-top: 16px;
    background: #1b6ef3;
    color: #fff;
    border: 0;
    padding: 10px 16px;
    border-radius: 6px;
    text-decoration: none;
    cursor: pointer;
}

.error {
    color: #b00020;
}