body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f2f5;
}
.container {
    text-align: center;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
input:not([type="color"]):not([type="file"]) {
    display: block;
    margin: 1rem auto;
    padding: 0.5rem;
    width: 80%;
}
input[type="file"] {
    display: block;
    margin: 1rem auto;
    width: 80%;
    cursor: pointer;
}
button {
    padding: 0.5rem 1rem;
    border: none;
    background-color: #007bff;
    color: white;
    border-radius: 4px;
    cursor: pointer;
}
#qr-result img {
    margin-top: 1rem;
    max-width: 100%;
}

select {
    display: block;
    margin: 1rem auto;
    padding: 0.5rem;
    width: 80%;
}

.color-row {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 1rem auto;
}

.color-row label {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 0.85rem;
    gap: 0.4rem;
}

.color-row input[type="color"] {
    width: 48px;
    height: 36px;
    padding: 2px;
    border: 1px solid #ccc;
    border-radius: 4px;
    cursor: pointer;
}

#download-btn {
    display: block;
    margin: 0.5rem auto 0;
    padding: 0.5rem 1rem;
    border: none;
    background-color: #28a745;
    color: white;
    border-radius: 4px;
    cursor: pointer;
}