.qrcode-textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
    line-height: 1.6;
    resize: vertical;
    margin-bottom: 15px;
    font-family: 'Noto Sans JP', sans-serif;
}
.qrcode-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}
#qrcode-display-wrapper {
    margin-top: 0px;
    margin-bottom: 20px;
}
#qrcode-display {
    width: 256px;
    height: 256px;
    margin: 0 auto;
    padding: 15px;
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}
#qrcode-display img {
    display: block;
    width: 100% !important;
    height: 100% !important;
}
.placeholder-text {
    color: #888;
    text-align: center;
    font-size: 0.9rem;
}
#download-section {
    display: flex;
    align-items: flex-end;
    gap: 15px;
    flex-wrap: wrap;
}
#download-section > div {
    flex-grow: 1;
}
.filename-wrapper {
    display: flex;
}
#filename-input {
    width: 100%;
    border: 1px solid #ccc;
    padding: 10px;
    font-size: 1rem;
    border-radius: 5px 0 0 5px;
    border-right: none;
}
#filename-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
    z-index: 2;
}
.file-extension {
    padding: 10px;
    background-color: #eee;
    border: 1px solid #ccc;
    border-left: none;
    border-radius: 0 5px 5px 0;
    font-size: 1rem;
    white-space: nowrap;
}