/* Base64 頁專用樣式；分頁與欄位沿用 site.css 的 .qr-tabs .qr-field */
.b6-tabs { grid-template-columns: repeat(3, 1fr); }
.b6-h2 { font-size: 1.1rem; margin: 1rem 0 .4rem; }
.b6-opts { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-items: end; }
.b6-opts > * { min-width: 0; }
.b6-btns { display: flex; flex-wrap: wrap; gap: 10px; margin: 10px 0; }
.b6-btns .btn { flex: 1 1 140px; }
.qr-field textarea { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .95rem; overflow-wrap: anywhere; word-break: break-all; }
.b6-preview img { max-width: 100%; max-height: 240px; border: 1px solid var(--line); border-radius: 8px; margin-top: 8px; }
.content table code { overflow-wrap: anywhere; word-break: break-all; }
@media (max-width: 560px) { .b6-opts { grid-template-columns: 1fr; } .b6-tabs button { font-size: .9rem; } }