.bkbg-sc-app{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;box-sizing:border-box}.bkbg-sc-app *,.bkbg-sc-app *::before,.bkbg-sc-app *::after{box-sizing:border-box}.bkbg-sc-header{text-align:center;margin-bottom:20px}.bkbg-sc-title{font-family:var(--bksc-tt-font-family,inherit);font-size:var(--bksc-tt-font-size-d,28px);font-weight:var(--bksc-tt-font-weight,700);font-style:var(--bksc-tt-font-style,normal);text-decoration:var(--bksc-tt-text-decoration,none);text-transform:var(--bksc-tt-text-transform,none);line-height:var(--bksc-tt-line-height-d,1.2);letter-spacing:var(--bksc-tt-letter-spacing-d,normal);word-spacing:var(--bksc-tt-word-spacing-d,normal);margin:0 0 6px}.bkbg-sc-subtitle{font-family:var(--bksc-st-font-family,inherit);font-size:var(--bksc-st-font-size-d,15px);font-weight:var(--bksc-st-font-weight,400);font-style:var(--bksc-st-font-style,normal);text-decoration:var(--bksc-st-text-decoration,none);text-transform:var(--bksc-st-text-transform,none);line-height:var(--bksc-st-line-height-d,1.4);letter-spacing:var(--bksc-st-letter-spacing-d,normal);word-spacing:var(--bksc-st-word-spacing-d,normal);opacity:.7;margin:0}.bkbg-sc-calc{background:#1a1a2e;border-radius:20px;padding:24px;max-width:420px;margin:0 auto;box-shadow:0 8px 40px rgb(0 0 0 / .45)}.bkbg-sc-topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;min-height:26px}.bkbg-sc-angle-toggle{display:flex;gap:4px}.bkbg-sc-angle-btn{padding:3px 10px;border:none;border-radius:6px;cursor:pointer;font-weight:700;font-size:12px;font-family:inherit;transition:background 0.2s,color 0.2s}.bkbg-sc-mem-indicator{font-size:12px;font-weight:700;color:#86efac;font-family:ui-monospace,monospace;min-height:16px}.bkbg-sc-expr{text-align:right;font-size:13px;color:rgb(255 255 255 / .4);font-family:ui-monospace,'Cascadia Code',monospace;min-height:18px;margin-bottom:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bkbg-sc-display{background:#0d0d1a;border-radius:10px;padding:12px 16px;text-align:right;font-size:36px;font-weight:700;color:#fff;font-family:ui-monospace,'Cascadia Code',monospace;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-bottom:14px;min-height:64px;display:flex;align-items:center;justify-content:flex-end}.bkbg-sc-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}.bkbg-sc-btn{border:none;cursor:pointer;font-weight:600;font-size:15px;font-family:inherit;border-radius:10px;min-height:44px;transition:filter 0.15s,transform 0.1s;line-height:1;padding:0 4px;user-select:none;-webkit-user-select:none}.bkbg-sc-btn:hover{filter:brightness(1.25)}.bkbg-sc-btn:active{transform:scale(.94)}.bkbg-sc-btn-num{background:#2d2d4a;color:#fff}.bkbg-sc-btn-op{background:#3d2d6a;color:#c4b5fd}.bkbg-sc-btn-fn{background:#1e2a4a;color:#93c5fd}.bkbg-sc-btn-eq{background:#6c3fb5;color:#fff}.bkbg-sc-btn-clear{background:#7f1d1d;color:#fecaca}.bkbg-sc-btn-mem{background:#1e2a4a;color:#86efac}.bkbg-sc-history{margin-top:16px;background:#111128;border-radius:8px;padding:10px 12px;max-height:140px;overflow-y:auto}.bkbg-sc-history-label{font-size:11px;font-weight:700;color:rgb(255 255 255 / .3);text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px}.bkbg-sc-history-entry{font-size:13px;color:#9ca3af;font-family:ui-monospace,monospace;padding:3px 0;border-bottom:1px solid rgb(255 255 255 / .05);cursor:default}.bkbg-sc-history-entry:last-child{border-bottom:none}.bkbg-sc-hint{text-align:center;margin-top:10px;font-size:11px;color:rgb(255 255 255 / .25)}@media (max-width:1024px){.bkbg-sc-title{font-size:var(--bksc-tt-font-size-t,var(--bksc-tt-font-size-d,28px));line-height:var(--bksc-tt-line-height-t,var(--bksc-tt-line-height-d,1.2));letter-spacing:var(--bksc-tt-letter-spacing-t,var(--bksc-tt-letter-spacing-d,normal));word-spacing:var(--bksc-tt-word-spacing-t,var(--bksc-tt-word-spacing-d,normal))}.bkbg-sc-subtitle{font-size:var(--bksc-st-font-size-t,var(--bksc-st-font-size-d,15px));line-height:var(--bksc-st-line-height-t,var(--bksc-st-line-height-d,1.4));letter-spacing:var(--bksc-st-letter-spacing-t,var(--bksc-st-letter-spacing-d,normal));word-spacing:var(--bksc-st-word-spacing-t,var(--bksc-st-word-spacing-d,normal))}}@media (max-width:767px){.bkbg-sc-title{font-size:var(--bksc-tt-font-size-m,var(--bksc-tt-font-size-t,var(--bksc-tt-font-size-d,28px)));line-height:var(--bksc-tt-line-height-m,var(--bksc-tt-line-height-t,var(--bksc-tt-line-height-d,1.2)));letter-spacing:var(--bksc-tt-letter-spacing-m,var(--bksc-tt-letter-spacing-t,var(--bksc-tt-letter-spacing-d,normal)));word-spacing:var(--bksc-tt-word-spacing-m,var(--bksc-tt-word-spacing-t,var(--bksc-tt-word-spacing-d,normal)))}.bkbg-sc-subtitle{font-size:var(--bksc-st-font-size-m,var(--bksc-st-font-size-t,var(--bksc-st-font-size-d,15px)));line-height:var(--bksc-st-line-height-m,var(--bksc-st-line-height-t,var(--bksc-st-line-height-d,1.4)));letter-spacing:var(--bksc-st-letter-spacing-m,var(--bksc-st-letter-spacing-t,var(--bksc-st-letter-spacing-d,normal)));word-spacing:var(--bksc-st-word-spacing-m,var(--bksc-st-word-spacing-t,var(--bksc-st-word-spacing-d,normal)))}}