.vo2-tabs{display:flex;flex-direction:row;gap:6px;overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:2px;margin-bottom:16px;scrollbar-width:none}.vo2-tabs::-webkit-scrollbar{display:none}.vo2-tab{height:38px;padding:0 18px;border:1px solid var(--color-hairline);border-radius:var(--rounded-md);background:var(--color-canvas);font-family:var(--font-sans);font-size:13px;font-weight:500;color:var(--color-body);cursor:pointer;white-space:nowrap;flex-shrink:0;transition:background .12s,color .12s,border-color .12s,box-shadow .12s}.vo2-tab:hover:not(.active){color:var(--color-ink);border-color:var(--color-hairline-strong)}.vo2-tab.active{background:var(--color-ink);color:var(--color-canvas);border-color:var(--color-ink);box-shadow:var(--shadow-1)}.vo2-tool-layout{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}.vo2-inputs-card,.vo2-result-card{background:var(--color-canvas);border:1px solid var(--color-hairline);border-radius:var(--rounded-md);padding:22px 24px;box-shadow:var(--shadow-1)}.vo2-fields{display:grid;gap:14px}.vo2-field{display:flex;flex-direction:column;gap:6px}.vo2-label{font-size:11px;font-weight:600;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.09em;color:var(--color-mute)}.vo2-input-group{display:flex;align-items:center;border:1px solid var(--color-hairline);border-radius:var(--rounded-sm);background:var(--color-canvas);overflow:hidden;transition:border-color .12s,box-shadow .12s}.vo2-input-group:focus-within{border-color:var(--color-hairline-strong);box-shadow:var(--shadow-2)}.vo2-input{flex:1;height:44px;padding:0 12px;border:none;background:transparent;font-family:var(--font-sans);font-size:16px;color:var(--color-ink);outline:none;min-width:0}.vo2-input::placeholder{color:var(--color-mute)}.vo2-input-unit{padding:0 12px 0 4px;font-size:13px;color:var(--color-mute);font-family:var(--font-mono);flex-shrink:0;white-space:nowrap}.vo2-time-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.vo2-seg{display:flex;background:var(--color-canvas-soft-2);border:1px solid var(--color-hairline);border-radius:var(--rounded-sm);padding:3px;width:fit-content;gap:0}.vo2-seg-btn{height:32px;padding:0 14px;border:none;border-radius:calc(var(--rounded-sm) - 2px);background:transparent;font-family:var(--font-sans);font-size:12px;font-weight:500;color:var(--color-body);cursor:pointer;transition:background .12s,color .12s,box-shadow .12s}.vo2-seg-btn.active{background:var(--color-canvas);color:var(--color-ink);box-shadow:var(--shadow-1)}.vo2-seg-btn:not(.active):hover{color:var(--color-ink)}.vo2-safety-note{display:flex;gap:10px;align-items:flex-start;font-size:12px;line-height:1.6;color:#92400e;padding:10px 14px;background:#fffbeb;border:1px solid #fde68a;border-radius:var(--rounded-sm);margin-bottom:14px}[data-theme=dark] .vo2-safety-note{background:#2d1f02;border-color:#78350f;color:#fbbf24}.vo2-error{font-size:13px;color:#dc2626;padding:10px 14px;background:#fef2f2;border:1px solid #fecaca;border-radius:var(--rounded-sm);margin-bottom:14px}[data-theme=dark] .vo2-error{background:#2c0a0a;border-color:#7f1d1d;color:#fca5a5}.vo2-placeholder{font-size:13px;color:var(--color-mute);text-align:center;padding:32px 16px;line-height:1.5}.vo2-result-inner{display:flex;flex-direction:column;gap:16px}.vo2-result-top{display:flex;flex-direction:column;gap:6px}.vo2-result-label{font-size:11px;font-weight:600;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.09em;color:var(--color-mute)}.vo2-result-num-row{display:flex;align-items:baseline;gap:8px}.vo2-result-val{font-size:44px;font-weight:700;font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--color-ink);line-height:1}.vo2-result-unit{font-size:13px;color:var(--color-mute);font-family:var(--font-mono)}.vo2-cat-badge{display:inline-block;padding:3px 10px;border-radius:var(--rounded-full);font-size:12px;font-weight:600;font-family:var(--font-mono);color:#fff;width:fit-content}.vo2-stats-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.vo2-stat-box{background:var(--color-canvas-soft-2);border:1px solid var(--color-hairline);border-radius:var(--rounded-sm);padding:10px 12px}.vo2-stat-label{font-size:10px;font-weight:600;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--color-mute);margin-bottom:3px}.vo2-stat-val{font-size:18px;font-weight:700;font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--color-ink)}.vo2-ref-section{display:flex;flex-direction:column;gap:6px}.vo2-ref-title{font-size:11px;font-weight:600;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.09em;color:var(--color-mute);margin-bottom:4px}.vo2-ref-row{display:flex;align-items:center;justify-content:space-between;padding:7px 10px;border-radius:var(--rounded-sm);border:1px solid transparent;font-size:12px;transition:background .1s}.vo2-ref-row.current{border-left-width:3px;padding-left:8px}.vo2-ref-cat{font-weight:600}.vo2-ref-range{font-family:var(--font-mono);font-size:11px;color:var(--color-mute)}.vo2-tool-desc{margin-top:8px;padding-top:32px;border-top:1px solid var(--color-hairline);font-size:14px;line-height:1.8;color:var(--color-body)}.vo2-tool-desc h2{font-size:18px;font-weight:600;color:var(--color-ink);letter-spacing:-.4px;margin-bottom:14px}.vo2-tool-desc p{margin-bottom:12px}.vo2-tool-desc a{color:var(--color-link);text-decoration:none;font-weight:500}.vo2-tool-desc a:hover{text-decoration:underline}@media(max-width:860px){.vo2-tool-layout{grid-template-columns:1fr}}@media(max-width:540px){.vo2-inputs-card,.vo2-result-card{padding:16px}.vo2-result-val{font-size:36px}.vo2-tab{padding:0 13px;font-size:12px}}