body {
    font-family: system-ui, -apple-system, sans-serif;
    max-width: 900px;
    margin: 40px auto;
    padding: 0 16px;
}

textarea {
    width: 100%;
    min-height: 140px;
    font-family: monospace;
    padding: 10px;
}

button {
    margin-top: 12px;
    padding: 8px 14px;
    font-size: 1rem;
    cursor: pointer;
}

.qr-list {
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

.qr-item {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: center;
}

.qr-item code {
    display: block;
    margin-top: 8px;
    font-size: 0.8rem;
    word-break: break-all;
    background: #f5f5f5;
    padding: 6px;
}

.qr-item .actions {
    margin-top: 8px;
}

/* Overlay */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 999;
}

.overlay-content {
    background: white;
    padding: 20px;
    max-width: 90vw;
    max-height: 90vh;
    overflow: auto;
    text-align: center;
}

.overlay-content code {
    margin-top: 12px;
    display: block;
    font-size: 0.75rem;
    word-break: break-all;
    background: #f5f5f5;
    padding: 8px;
}

.close {
    margin-top: 12px;
}