.bcalc-container { background: #ffffff; padding: 25px; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.1); font-family: -apple-system, sans-serif; max-width: 900px; margin: 20px auto; color: #333; }
.bcalc-unit-selector { margin-bottom: 20px; display: flex; gap: 20px; border-bottom: 2px solid #f0f0f0; padding-bottom: 15px; }
.bcalc-unit-selector label { cursor: pointer; font-weight: bold; display: flex; align-items: center; gap: 8px; font-size: 0.9em; }
.bcalc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.bcalc-form-item { margin-bottom: 15px; }
.bcalc-label-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 5px; }
.bcalc-label-row label { font-weight: bold; font-size: 0.85em; color: #555; }
.bcalc-num-input { width: 80px; padding: 6px; border: 1px solid #ccc; border-radius: 5px; font-size: 15px; text-align: right; }
.bcalc-slider { width: 100%; height: 6px; border-radius: 3px; background: #e0e0e0; outline: none; -webkit-appearance: none; margin-top: 8px; }
.bcalc-slider::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; background: #1a73e8; border-radius: 50%; cursor: pointer; border: 2px solid #fff; }
.bcalc-env-header { background: #f1f8ff; padding: 12px; border-radius: 6px; cursor: pointer; font-weight: bold; color: #1a73e8; margin: 15px 0; border: 1px solid #d0e3ff; display: flex; justify-content: space-between; font-size: 0.9em; }
.bcalc-env-content { display: none; padding: 15px; background: #fafafa; border-radius: 6px; margin-bottom: 15px; border: 1px solid #eee; }
.bcalc-canvas-wrapper { background: #fff; border: 1px solid #eee; border-radius: 8px; margin: 20px 0; overflow-x: auto; }
canvas#bcalc-chart { width: 100%; height: auto; min-width: 600px; display: block; }
.bcalc-table-wrapper { overflow-x: auto; margin-top: 25px; border-radius: 8px; border: 1px solid #eee; }
table.bcalc-table { width: 100%; border-collapse: collapse; min-width: 700px; }
.bcalc-table th { background: #f8f9fa; padding: 14px; font-size: 0.7em; text-align: right; border-bottom: 2px solid #dee2e6; color: #666; }
.bcalc-table td { padding: 12px; text-align: right; border-bottom: 1px solid #f0f0f0; font-family: monospace; font-size: 0.9em; }
.bcalc-negative { color: #e74c3c; font-weight: bold; }