* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

:root {
    --red: #d32f2f;
    --black: #111;
    --gray: #555;
}

body {
    background: #fff;
    color: var(--black);
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    color: var(--red);
    font-size: 2.4rem;
}

header p {
    color: var(--gray);
}

section {
    max-width: 500px;
    margin: 0 auto 30px;
    padding: 25px;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
}

section h2 {
    text-align: center;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    font-weight: bold;
    display: block;
    margin-bottom: 5px;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #ccc;
}

.checkbox {
    display: flex;
    gap: 10px;
    align-items: center;
}

button {
    width: 100%;
    padding: 12px;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    border: none;
}

button:not(.secondary) {
    background: var(--red);
    color: white;
}

button.secondary {
    margin-top: 10px;
    background: white;
    border: 1px solid var(--red);
    color: var(--red);
}

.hidden {
    display: none;
}

.fidelity-card {
    border: 2px solid var(--red);
    border-radius: 15px;
    padding: 20px;
    text-align: center;
}

#card-name {
    font-size: 1.2rem;
    font-weight: bold;
}

#card-email {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 15px;
}

#barcode {
    margin: 20px 0;
}