.bkbg-btc-app{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;-webkit-font-smoothing:antialiased}.bkbg-btc-card{margin:0 auto;padding:40px;box-shadow:0 4px 32px rgb(0 0 0 / .1)}.bkbg-btc-title{text-align:center;font-family:var(--bkbg-btc-title-font-family,inherit);font-size:var(--bkbg-btc-title-font-size-d,28px);font-weight:var(--bkbg-btc-title-font-weight,800);font-style:var(--bkbg-btc-title-font-style,normal);text-transform:var(--bkbg-btc-title-text-transform,none);text-decoration:var(--bkbg-btc-title-text-decoration,none);line-height:var(--bkbg-btc-title-line-height-d,1.2);letter-spacing:var(--bkbg-btc-title-letter-spacing-d,normal);word-spacing:var(--bkbg-btc-title-word-spacing-d,normal);margin-bottom:6px}.bkbg-btc-subtitle{text-align:center;font-family:var(--bkbg-btc-sub-font-family,inherit);font-size:var(--bkbg-btc-sub-font-size-d,15px);font-weight:var(--bkbg-btc-sub-font-weight,normal);font-style:var(--bkbg-btc-sub-font-style,normal);text-transform:var(--bkbg-btc-sub-text-transform,none);text-decoration:var(--bkbg-btc-sub-text-decoration,none);line-height:var(--bkbg-btc-sub-line-height-d,1.5);letter-spacing:var(--bkbg-btc-sub-letter-spacing-d,normal);word-spacing:var(--bkbg-btc-sub-word-spacing-d,normal);color:#6b7280;margin-bottom:28px}.bkbg-btc-tabs{display:flex;gap:8px;margin-bottom:24px}.bkbg-btc-tab{flex:1;padding:10px;font-size:14px;font-weight:700;border:2px solid #d1d5db;border-radius:8px;background:#fff0;cursor:pointer;transition:background 0.18s,color 0.18s,border-color 0.18s}.bkbg-btc-mode-row{display:flex;align-items:center;gap:8px;margin-bottom:20px;flex-wrap:wrap}.bkbg-btc-mode-label{font-size:13px;font-weight:600;color:#6b7280;margin-right:4px}.bkbg-btc-mode-btn{padding:6px 16px;font-size:13px;font-weight:600;border-radius:99px;border:2px solid #d1d5db;background:#fff0;color:#6b7280;cursor:pointer;transition:all 0.18s}.bkbg-btc-lbl{display:block;font-size:12px;font-weight:600;margin-bottom:6px;letter-spacing:.04em;text-transform:uppercase}.bkbg-btc-textarea{width:100%;min-height:90px;padding:12px 14px;border:1.5px solid #d1d5db;border-radius:8px;font-size:14px;font-family:'Courier New',Courier,monospace;background:#f9fafb;color:#111827;resize:vertical;box-sizing:border-box;outline:none;transition:border-color 0.15s;margin-bottom:0}.bkbg-btc-textarea:focus{border-color:#6b7280}.bkbg-btc-convert-btn{width:100%;margin:14px 0;padding:12px;font-size:15px;font-weight:700;color:#fff;border:none;border-radius:10px;cursor:pointer;transition:opacity 0.2s,transform 0.1s}.bkbg-btc-convert-btn:hover{opacity:.88;transform:translateY(-1px)}.bkbg-btc-convert-btn:active{transform:translateY(0)}.bkbg-btc-output{border-radius:8px;padding:14px;font-family:'Courier New',Courier,monospace;font-size:13px;min-height:80px;word-break:break-all;white-space:pre-wrap;line-height:1.6;margin-bottom:10px}.bkbg-btc-output-empty{color:#9ca3af;font-style:italic}.bkbg-btc-error{color:#ef4444;font-size:13px;font-family:sans-serif}.bkbg-btc-copy-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 16px;font-size:13px;font-weight:600;border:1.5px solid #d1d5db;border-radius:8px;background:#fff;color:#374151;cursor:pointer;transition:all 0.18s}.bkbg-btc-copy-btn:hover{background:#f3f4f6}.bkbg-btc-stats{display:flex;gap:16px;margin-top:10px;font-size:12px;color:#9ca3af;flex-wrap:wrap}.bkbg-btc-stat{font-weight:600}.bkbg-btc-divider{border:none;border-top:1.5px solid #e5e7eb;margin:28px 0}.bkbg-btc-ascii-title{font-size:16px;font-weight:700;margin-bottom:14px}.bkbg-btc-ascii-filters{display:flex;gap:8px;margin-bottom:14px;flex-wrap:wrap}.bkbg-btc-ascii-filter-btn{padding:5px 14px;font-size:12px;font-weight:700;border-radius:99px;border:1.5px solid #d1d5db;background:#fff0;color:#6b7280;cursor:pointer;transition:all 0.18s}.bkbg-btc-ascii-table{width:100%;border-collapse:collapse;font-size:12px;font-family:'Courier New',Courier,monospace}.bkbg-btc-ascii-table th{background:#f3f4f6;padding:6px 8px;text-align:center;font-weight:700;border:1px solid #e5e7eb;color:#6b7280}.bkbg-btc-ascii-table td{padding:5px 8px;text-align:center;border:1px solid #e5e7eb;color:#374151;cursor:pointer;transition:background 0.1s}.bkbg-btc-ascii-table td:hover{background:#ede9fe55}.bkbg-btc-ascii-char{font-weight:700;font-size:14px;color:#111827}.bkbg-btc-ascii-dim{color:#9ca3af}@media (max-width:1024px){.bkbg-btc-title{font-size:var(--bkbg-btc-title-font-size-t,var(--bkbg-btc-title-font-size-d,28px));line-height:var(--bkbg-btc-title-line-height-t,var(--bkbg-btc-title-line-height-d,1.2));letter-spacing:var(--bkbg-btc-title-letter-spacing-t,var(--bkbg-btc-title-letter-spacing-d,normal));word-spacing:var(--bkbg-btc-title-word-spacing-t,var(--bkbg-btc-title-word-spacing-d,normal))}.bkbg-btc-subtitle{font-size:var(--bkbg-btc-sub-font-size-t,var(--bkbg-btc-sub-font-size-d,15px));line-height:var(--bkbg-btc-sub-line-height-t,var(--bkbg-btc-sub-line-height-d,1.5));letter-spacing:var(--bkbg-btc-sub-letter-spacing-t,var(--bkbg-btc-sub-letter-spacing-d,normal));word-spacing:var(--bkbg-btc-sub-word-spacing-t,var(--bkbg-btc-sub-word-spacing-d,normal))}}@media (max-width:767px){.bkbg-btc-title{font-size:var(--bkbg-btc-title-font-size-m,var(--bkbg-btc-title-font-size-t,var(--bkbg-btc-title-font-size-d,28px)));line-height:var(--bkbg-btc-title-line-height-m,var(--bkbg-btc-title-line-height-t,var(--bkbg-btc-title-line-height-d,1.2)));letter-spacing:var(--bkbg-btc-title-letter-spacing-m,var(--bkbg-btc-title-letter-spacing-t,var(--bkbg-btc-title-letter-spacing-d,normal)));word-spacing:var(--bkbg-btc-title-word-spacing-m,var(--bkbg-btc-title-word-spacing-t,var(--bkbg-btc-title-word-spacing-d,normal)))}.bkbg-btc-subtitle{font-size:var(--bkbg-btc-sub-font-size-m,var(--bkbg-btc-sub-font-size-t,var(--bkbg-btc-sub-font-size-d,15px)));line-height:var(--bkbg-btc-sub-line-height-m,var(--bkbg-btc-sub-line-height-t,var(--bkbg-btc-sub-line-height-d,1.5)));letter-spacing:var(--bkbg-btc-sub-letter-spacing-m,var(--bkbg-btc-sub-letter-spacing-t,var(--bkbg-btc-sub-letter-spacing-d,normal)));word-spacing:var(--bkbg-btc-sub-word-spacing-m,var(--bkbg-btc-sub-word-spacing-t,var(--bkbg-btc-sub-word-spacing-d,normal)))}}@media (max-width:500px){.bkbg-btc-card{padding:24px 16px}.bkbg-btc-tabs{flex-wrap:wrap}.bkbg-btc-ascii-table th,.bkbg-btc-ascii-table td{padding:4px 4px}}