.concentration-calculator-content{gap:18px;display:grid}.concentration-form{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:14px;display:grid}.concentration-field{gap:6px;min-width:0;display:grid}.concentration-field-wide{grid-column:1/-1}.concentration-field-label{color:var(--muted);margin:0;font-size:14px}.concentration-switch{border:1px solid var(--line);border-radius:var(--radius-control);background:var(--surface);grid-template-columns:repeat(2,minmax(0,1fr));gap:4px;padding:4px;display:grid}.concentration-switch button{border-radius:calc(var(--radius-control) - 4px);min-height:44px;color:var(--text);font:inherit;cursor:pointer;background:0 0;border:0}.concentration-switch button.is-active{background:var(--green-soft);color:var(--green-strong);font-weight:600}.concentration-picker{border:1px solid var(--line);border-radius:var(--radius-control);background:var(--surface)}.concentration-picker summary{cursor:pointer;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:6px 12px;min-height:44px;padding:10px 14px;list-style:none;display:flex}.concentration-picker summary::-webkit-details-marker{display:none}.concentration-picker[open] summary{border-bottom:1px solid var(--line)}.concentration-picker-count{color:var(--muted);font-size:13px}.concentration-picker-list{grid-template-columns:minmax(0,1fr);gap:2px 18px;padding:12px 14px;display:grid}.concentration-picker-option{align-items:center;gap:8px;min-height:36px;display:flex}.concentration-picker-option input{block-size:18px;inline-size:18px}.concentration-picker-done{justify-content:flex-end;padding:0 14px 12px;display:flex}.concentration-conversions{margin-top:14px}.concentration-conversions-title{color:var(--muted);margin:0 0 4px;font-size:14px}.concentration-row{border-bottom:1px solid var(--line);grid-template-columns:13ch max-content minmax(0,1fr);align-items:baseline;gap:6px;padding:7px 10px;display:grid}.concentration-row:last-child{border-bottom:0}.concentration-row.is-source{border-radius:var(--radius-control);background:var(--green-soft);color:var(--green-strong);border:0;margin:2px 0;padding:8px 10px}.concentration-value{font-variant-numeric:tabular-nums;text-align:left}.concentration-unit{color:var(--muted)}.concentration-row.is-source .concentration-unit,.concentration-row.is-source .concentration-source{color:var(--green-strong)}.concentration-source{color:var(--muted);font-size:12px}.concentration-actions{margin-top:14px}.concentration-note{color:var(--muted);margin:0;font-size:14px;line-height:1.5}.concentration-history-list{gap:8px;margin:0;padding:0;list-style:none;display:grid}.concentration-history-item{border:1px solid var(--line);border-radius:var(--radius-control);align-items:center;gap:8px;padding:8px 10px;display:flex}.concentration-history-open{min-height:44px;color:var(--text);font:inherit;text-align:left;cursor:pointer;background:0 0;border:0;flex:1;gap:2px;padding:0;display:grid}.concentration-history-open span{color:var(--muted);font-size:13px}@media (max-width:720px){.concentration-form{grid-template-columns:minmax(0,1fr)}.concentration-field-wide{grid-column:auto}.concentration-picker-list{grid-template-columns:minmax(0,1fr)}}