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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background: #f4f4f4;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    margin-bottom: 20px;
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

button,
.btn {
    display: inline-block;
    padding: 10px 20px;
    background: #007bff;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    margin-right: 10px;
}

button:hover,
.btn:hover {
    background: #0056b3;
}

.card-item {
    border: 1px solid #ddd;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 4px;
}

.card-item h3 {
    margin-bottom: 10px;
}

.card-item a,
.card-item button {
    margin-right: 10px;
}

/* Card public page */
.card-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #f4f4f4;
}

.card {
    max-width: 500px;
    width: 100%;
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.card .details {
    text-align: left;
    margin: 20px 0;
}

.card .qr img {
    max-width: 200px;
    margin: 20px auto;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        margin: 10px;
        padding: 15px;
    }
}