body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background: #fff;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 10px;
    width: 80%;
    max-width: 800px;
}

.header {
    text-align: center;
    margin-bottom: 20px;
}

.header img {
    max-width: 150px;
}

.header h1 {
    font-size: 1.5em;
    margin: 0;
}

.content {
    margin-top: 20px;
}

.row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.col {
    display: flex;
    flex-direction: column;
}

.col label {
    font-weight: bold;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 20px;
    align-self: center;
}

button:hover {
    background-color: #45a049;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(0,0,0);
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 500px;
    text-align: center;
    border-radius: 10px;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

#qrcode input[type="text"] {
    width: 100%;
    padding: 6px;
    margin-top: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    text-align: center;
}