.cav-equation-card {
    display: grid;
    grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1.1fr);
    align-items: stretch;
    gap: 18px;
    margin-top: 18px;
    padding: 18px;
    border-radius: 24px;
    background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,250,252,0.92));
    border: 1px solid rgba(15, 23, 42, 0.05);
    box-shadow: 0 18px 32px rgba(15, 23, 42, 0.06);
}

.cav-equation-static,
.cav-compliance-calculator {
    padding: 24px;
    border-radius: 22px;
    background: rgba(255,255,255,0.82);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.cav-equation-static {
    display: grid;
    align-content: center;
    justify-items: center;
    text-align: center;
}

.cav-equation-main {
    display: inline-flex;
    align-items: center;
    gap: 18px;
    color: var(--accent-strong);
    font-size: clamp(42px, 6vw, 72px);
    line-height: 1;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.cav-equation-symbol,
.cav-equation-equals {
    display: inline-flex;
    align-items: center;
}

.cav-equation-fraction {
    display: inline-grid;
    align-items: center;
    justify-items: center;
    gap: 8px;
    min-width: 122px;
}

.cav-equation-numerator,
.cav-equation-denominator {
    display: block;
}

.cav-equation-bar {
    width: 100%;
    height: 5px;
    border-radius: 999px;
    background: currentColor;
}

.cav-equation-units {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 18px;
}

.cav-unit-chip {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 8px 11px;
    border-radius: 999px;
    background: rgba(240, 247, 255, 0.98);
    border: 1px solid rgba(10, 132, 255, 0.12);
    color: var(--accent-strong);
    font-size: 12px;
    font-weight: 800;
    cursor: help;
}

.cav-unit-chip::after {
    content: attr(data-unit-tooltip);
    position: absolute;
    left: 50%;
    bottom: calc(100% + 10px);
    width: min(240px, 70vw);
    padding: 10px 12px;
    border-radius: 14px;
    background: rgba(15, 23, 42, 0.94);
    color: #fff;
    font-size: 12px;
    font-weight: 650;
    line-height: 1.4;
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, 6px);
    transition: opacity 0.18s ease, transform 0.18s ease;
    z-index: 5;
}

.cav-unit-chip:hover::after,
.cav-unit-chip:focus-visible::after {
    opacity: 1;
    transform: translate(-50%, 0);
}

.cav-equation-static p {
    max-width: 540px;
    margin: 18px auto 0;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.65;
}

.cav-compliance-calculator {
    display: grid;
    gap: 16px;
}

.cav-calculator-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
}

.cav-calculator-head h4 {
    margin: 5px 0 0;
    font-size: 24px;
    letter-spacing: -0.03em;
}

.cav-calculator-head p {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.4;
}

.cav-solve-toggle {
    display: inline-flex;
    gap: 6px;
    padding: 5px;
    border-radius: 999px;
    background: rgba(248, 250, 252, 0.92);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.cav-solve-toggle button {
    width: auto;
    min-width: 46px;
    padding: 8px 12px;
    border: none;
    border-radius: 999px;
    background: transparent;
    color: var(--muted-strong);
    font-size: 13px;
    font-weight: 800;
    box-shadow: none;
}

.cav-solve-toggle button.is-active {
    background: #fff;
    color: var(--accent-strong);
    box-shadow: 0 10px 22px rgba(10, 132, 255, 0.1);
}

.cav-live-equation {
    display: grid;
    gap: 16px;
    padding: 24px;
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(248,250,252,0.94), rgba(240,247,255,0.72));
    border: 1px solid rgba(10, 132, 255, 0.1);
}

.cav-live-equation-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    color: var(--accent-strong);
    font-size: clamp(28px, 3.6vw, 42px);
    font-weight: 850;
    line-height: 1.1;
    letter-spacing: -0.04em;
}

.cav-live-fraction {
    display: inline-grid;
    align-items: center;
    justify-items: center;
    gap: 8px;
    min-width: 116px;
}

.cav-live-fraction-bar {
    width: 100%;
    height: 4px;
    border-radius: 999px;
    background: currentColor;
}

.cav-live-multiply {
    color: var(--muted-strong);
}

.cav-equation-stepper,
.cav-equation-answer {
    display: inline-grid;
    gap: 5px;
    justify-items: center;
    vertical-align: middle;
}

.cav-equation-stepper-label,
.cav-equation-answer span,
.cav-equation-answer small {
    color: var(--muted);
    font-size: 11px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.cav-equation-stepper-body {
    display: inline-flex;
    align-items: stretch;
    min-height: 54px;
    border-radius: 20px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    background: rgba(255,255,255,0.96);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.9), 0 10px 20px rgba(15, 23, 42, 0.04);
    overflow: hidden;
}

.cav-stepper-button {
    width: 42px;
    min-width: 42px;
    padding: 0;
    border: none;
    border-radius: 0;
    background: rgba(240,247,255,0.78);
    color: var(--accent-strong);
    box-shadow: none;
    font-size: 18px;
    line-height: 1;
    font-weight: 850;
}

.cav-stepper-button:hover,
.cav-stepper-button:focus-visible {
    transform: none;
    background: rgba(10, 132, 255, 0.12);
}

.cav-stepper-value {
    min-width: 84px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 14px;
    color: var(--text);
    font-size: 20px;
    font-weight: 850;
    text-align: center;
}

.cav-stepper-unit {
    color: var(--muted-strong);
    font-size: 12px;
    font-weight: 800;
}

.cav-equation-answer strong {
    min-width: 132px;
    padding: 12px 16px;
    border-radius: 18px;
    background: #fff;
    color: var(--accent-strong);
    border: 1px solid rgba(10, 132, 255, 0.12);
    box-shadow: 0 14px 28px rgba(10, 132, 255, 0.08);
    font-size: 22px;
    text-align: center;
}

.cav-equation-hint {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.55;
    text-align: center;
}

.cav-calc-result {
    padding: 16px 18px;
    border-radius: 20px;
    background: linear-gradient(180deg, rgba(255,250,235,0.98), rgba(255,245,222,0.92));
    border: 1px solid rgba(229, 190, 106, 0.24);
}

.cav-calc-result span {
    display: block;
    color: #8c6010;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.cav-calc-result strong {
    display: block;
    margin-top: 6px;
    color: #7c5a12;
    font-size: 28px;
    letter-spacing: -0.03em;
}

.cav-calc-result p {
    margin: 8px 0 0;
    color: #7c5a12;
    font-size: 13px;
    line-height: 1.5;
}

.cav-vessel-comparison {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cav-vessel-card {
    position: relative;
    min-height: 230px;
    overflow: hidden;
}

.cav-vessel-card::before {
    content: "";
    position: absolute;
    inset: 24px auto 24px 0;
    width: 5px;
    border-radius: 999px;
}

.cav-vessel-card.is-artery::before {
    background: #ef4444;
}

.cav-vessel-card.is-vein::before {
    background: var(--accent);
}

.cav-vessel-card h4 {
    margin-top: 12px;
}

.cav-vessel-card.is-artery .ida-cause-badge {
    color: #b91c1c;
    background: rgba(254, 226, 226, 0.92);
    border-color: rgba(239, 68, 68, 0.16);
}

.cav-vessel-card.is-vein .ida-cause-badge {
    color: var(--accent-strong);
    background: rgba(240, 247, 255, 0.98);
    border-color: rgba(10, 132, 255, 0.14);
}

.cav-elasticity-callout {
    margin-top: 18px;
    padding: 18px 20px;
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(255,250,235,0.98), rgba(255,245,222,0.94));
    border: 1px solid rgba(229, 190, 106, 0.26);
}

.cav-elasticity-callout strong {
    display: block;
    color: #7c5a12;
    font-size: 18px;
    letter-spacing: -0.02em;
}

.cav-elasticity-callout p {
    margin: 6px 0 0;
    color: #8c6010;
    font-size: 14px;
    line-height: 1.5;
}

.cav-hemo-simulator {
    margin-top: 18px;
    padding: 18px;
    border-radius: 30px;
    background: #fff;
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 26px 54px rgba(15, 23, 42, 0.08);
    display: grid;
    gap: 12px;
}

.cav-hemo-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
}

.cav-hemo-head h4 {
    margin: 6px 0 0;
    color: var(--text);
    font-size: 24px;
    letter-spacing: -0.04em;
}

.cav-hemo-description {
    max-width: 620px;
    margin: 8px 0 0;
    color: var(--muted-strong);
    font-size: 14px;
    line-height: 1.45;
}

.cav-hemo-controls {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 14px;
    flex-wrap: wrap;
}

.cav-hemo-toggle {
    display: inline-flex;
    gap: 6px;
    padding: 6px;
    border-radius: 999px;
    background: rgba(248, 250, 252, 0.96);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.cav-hemo-toggle button {
    width: auto;
    min-width: 138px;
    padding: 10px 14px;
    border: none;
    border-radius: 999px;
    background: transparent;
    color: var(--muted-strong);
    box-shadow: none;
    font-size: 13px;
    font-weight: 850;
    line-height: 1.1;
}

.cav-hemo-toggle button span {
    display: block;
    margin-top: 2px;
    color: inherit;
    font-size: 10px;
    font-weight: 800;
    opacity: 0.75;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.cav-hemo-toggle button.is-active {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 14px 28px rgba(10, 132, 255, 0.22);
}

.cav-surge-control {
    min-width: 230px;
    display: grid;
    gap: 8px;
    padding: 12px 14px;
    border-radius: 20px;
    background: rgba(248, 250, 252, 0.92);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.cav-surge-control > span {
    color: var(--text);
    font-size: 13px;
    font-weight: 850;
}

.cav-surge-control input {
    width: 100%;
    accent-color: var(--accent);
}

.cav-surge-control small {
    display: flex;
    justify-content: space-between;
    color: var(--muted);
    font-size: 11px;
    font-weight: 800;
}

.cav-hemo-reset {
    width: auto;
    min-width: 86px;
    padding: 13px 16px;
    border-radius: 999px;
    border: 1px solid rgba(10, 132, 255, 0.16);
    background: #fff;
    color: var(--accent-strong);
    box-shadow: 0 12px 24px rgba(10, 132, 255, 0.10);
    font-size: 13px;
    font-weight: 850;
}

.cav-hemo-reset:hover,
.cav-hemo-reset:focus-visible {
    background: rgba(240, 247, 255, 0.98);
    transform: translateY(-1px);
}

.cav-hemo-visual-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 16px;
    align-items: stretch;
}

.cav-hemo-canvas-shell {
    position: relative;
    aspect-ratio: 16 / 7;
    min-height: 260px;
    max-height: 430px;
    border-radius: 26px;
    background: linear-gradient(180deg, rgba(248,250,252,0.92), rgba(240,247,255,0.7));
    border: 1px solid rgba(15, 23, 42, 0.06);
    overflow: hidden;
}

.cav-hemo-canvas-shell canvas,
.cav-pressure-monitor canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.cav-hemo-figure-legend {
    padding: 18px;
    border-radius: 24px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.06);
    align-self: stretch;
}

.cav-hemo-figure-legend span {
    color: var(--muted);
    font-size: 12px;
    font-weight: 850;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.cav-hemo-figure-legend strong {
    display: block;
    margin-top: 8px;
    color: var(--text);
    font-size: 18px;
    letter-spacing: -0.03em;
}

.cav-hemo-figure-legend ol {
    margin: 12px 0 0;
    padding-left: 20px;
    color: var(--muted-strong);
    font-size: 14px;
    line-height: 1.5;
}

.cav-hemo-figure-legend li + li {
    margin-top: 8px;
}

.cav-pressure-monitor {
    padding: 12px 14px 10px;
    border-radius: 24px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.cav-pressure-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
}

.cav-pressure-head strong {
    color: var(--text);
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.cav-pressure-head span {
    color: var(--muted);
    font-size: 12px;
    font-weight: 800;
}

.cav-pressure-monitor canvas {
    height: 78px;
}

.cav-hemo-equation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    padding: 12px 16px;
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(255,250,235,0.98), rgba(255,245,222,0.92));
    border: 1px solid rgba(229, 190, 106, 0.24);
    text-align: center;
}

.cav-hemo-equation span {
    color: #8c6010;
    font-size: 22px;
    font-weight: 850;
    letter-spacing: -0.04em;
}

.cav-hemo-equation strong {
    color: #7c5a12;
    font-size: 14px;
    font-weight: 850;
}

.cav-flow-core {
    border-color: rgba(10, 132, 255, 0.18);
}

.cav-flow-equation-card,
.cav-flow-trap-card,
.cav-flow-reynolds-card {
    display: grid;
    grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1fr);
    gap: 18px;
    align-items: stretch;
    margin-top: 18px;
}

.cav-flow-equation-panel,
.cav-flow-clinical-panel,
.cav-flow-calculator,
.cav-flow-warning {
    padding: 22px;
    border-radius: 24px;
    background: #fff;
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 18px 36px rgba(15, 23, 42, 0.06);
}

#cavPhysicsFlowTopicContent .cav-flow-equation-panel {
    padding: 16px;
}

.cav-flow-calculator {
    display: grid;
    gap: 16px;
}

.cav-flow-calculator .cav-equation-stepper-label,
.cav-flow-calculator .cav-equation-answer span,
.cav-flow-calculator .cav-equation-answer small {
    text-transform: none;
}

.cav-flow-equation-panel {
    display: grid;
    place-items: center;
    text-align: center;
    background: linear-gradient(180deg, rgba(240,247,255,0.96), rgba(255,255,255,0.98));
}

.cav-flow-equation-panel.is-reynolds {
    background: linear-gradient(180deg, rgba(255,245,245,0.96), rgba(255,255,255,0.98));
}

.cav-flow-equation-title,
.cav-flow-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    padding: 8px 12px;
    border-radius: 999px;
    color: var(--accent-strong);
    background: rgba(240,247,255,0.98);
    border: 1px solid rgba(10, 132, 255, 0.14);
    font-size: 12px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.cav-flow-badge.is-red {
    color: #b91c1c;
    background: rgba(254, 226, 226, 0.92);
    border-color: rgba(239, 68, 68, 0.16);
}

.cav-flow-equation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin: 12px 0 8px;
    color: var(--accent-strong);
    font-size: 48px;
    font-weight: 850;
    letter-spacing: -0.04em;
}

.cav-flow-equation sub,
.cav-flow-equation sup {
    font-size: 0.45em;
}

.cav-flow-fraction {
    display: inline-grid;
    gap: 8px;
    justify-items: center;
    min-width: 110px;
}

.cav-flow-fraction span {
    line-height: 1;
}

.cav-flow-bar {
    width: 100%;
    height: 5px;
    border-radius: 999px;
    background: currentColor;
}

.cav-flow-equation-panel p {
    margin: 0;
    color: var(--muted-strong);
    font-size: 14px;
    line-height: 1.5;
}

.cav-flow-live-equation {
    min-height: 220px;
}

.cav-live-product {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.cav-flow-result {
    background: linear-gradient(180deg, rgba(240,247,255,0.98), rgba(232,244,255,0.92));
    border-color: rgba(10, 132, 255, 0.16);
}

.cav-flow-result span,
.cav-flow-result strong,
.cav-flow-result p {
    color: var(--accent-strong);
}

.cav-flow-trap-panel {
    margin-top: 18px;
}

.cav-flow-trap-panel {
    display: grid;
    gap: 18px;
    background: #fff;
    border-color: rgba(15, 23, 42, 0.08);
}

.cav-reynolds-subpanel {
    background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,250,252,0.96));
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 24px;
    padding: 22px 24px;
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.045);
}

.cav-reynolds-subpanel .section-label {
    color: #475569;
    font-size: 15px;
    letter-spacing: 0.16em;
}

.cav-reynolds-subpanel:first-child {
    background: linear-gradient(180deg, rgba(248,250,252,0.98), rgba(255,255,255,0.98));
}

.cav-flow-clinical-panel h4 {
    margin: 14px 0 8px;
    color: var(--text);
    font-size: 24px;
    letter-spacing: -0.04em;
}

.cav-flow-clinical-panel p,
.cav-flow-warning p {
    margin: 0;
    color: var(--muted-strong);
    font-size: 15px;
    line-height: 1.65;
}

.cav-flow-mini-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin-top: 18px;
}

.cav-flow-mini-grid div,
.cav-flow-chain span {
    padding: 14px;
    border-radius: 18px;
    background: rgba(248,250,252,0.92);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.cav-flow-mini-grid strong,
.cav-flow-mini-grid span {
    display: block;
}

.cav-flow-mini-grid strong {
    color: var(--text);
    font-size: 13px;
}

.cav-flow-mini-grid span {
    margin-top: 5px;
    color: var(--muted-strong);
    font-size: 12px;
    line-height: 1.4;
}

.cav-flow-mini-caption-title {
    display: block;
    margin-top: 4px;
    color: var(--text);
    font-size: 17px;
}

.cav-flow-mini-caption-copy {
    display: block;
    color: var(--muted-strong);
    font-size: 15px;
    line-height: 1.5;
}

.cav-flow-visual-card {
    min-height: 188px;
}

.cav-flow-single-vessel,
.cav-flow-capillary-bed,
.cav-flow-exchange-field {
    position: relative;
    display: block;
    width: 100%;
    height: 96px;
    margin-bottom: 12px;
    border-radius: 18px;
    background: linear-gradient(180deg, rgba(240,247,255,0.96), rgba(255,255,255,0.98));
    border: 1px solid rgba(10, 132, 255, 0.10);
    overflow: hidden;
}

.cav-flow-single-vessel::before {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    top: 32px;
    height: 12px;
    border-radius: 999px;
    background: rgba(239, 68, 68, 0.18);
    border-top: 3px solid rgba(239, 68, 68, 0.38);
    border-bottom: 3px solid rgba(239, 68, 68, 0.38);
}

.cav-flow-single-vessel::after {
    content: "small r";
    position: absolute;
    left: 18px;
    top: 10px;
    color: #b91c1c;
    font-size: 11px;
    font-weight: 850;
    text-transform: uppercase;
}

.cav-flow-velocity-arrow {
    position: absolute;
    left: 42px;
    right: 26px;
    top: 36px;
    height: 3px;
    border-radius: 999px;
    background: var(--accent);
}

.cav-flow-velocity-arrow::after {
    content: "";
    position: absolute;
    right: -2px;
    top: -5px;
    width: 0;
    height: 0;
    border-left: 10px solid var(--accent);
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
}

.cav-flow-capillary-bed {
    display: block;
    padding: 0;
}

.cav-flow-capillary-bed svg {
    display: block;
    width: 100%;
    height: 100%;
}

.cav-flow-capillary-bed path,
.cav-flow-capillary-bed circle {
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.cav-flow-capillary-bed .cav-capillary-trunk {
    stroke-width: 9;
}

.cav-flow-capillary-bed .cav-capillary-trunk.is-arterial {
    stroke: rgba(239, 68, 68, 0.36);
}

.cav-flow-capillary-bed .cav-capillary-trunk.is-venous {
    stroke: rgba(14, 165, 233, 0.34);
}

.cav-flow-capillary-bed .cav-capillary-branch {
    stroke: url(#cavCapillaryGradient);
    stroke-width: 5;
}

.cav-flow-capillary-bed .cav-capillary-mesh {
    stroke: url(#cavCapillaryGradient);
    stroke-width: 3.5;
    opacity: 0.82;
}

.cav-flow-capillary-bed .cav-capillary-collector {
    stroke-width: 4;
}

.cav-flow-capillary-bed .cav-capillary-collector.is-arterial {
    stroke: rgba(239, 68, 68, 0.42);
}

.cav-flow-capillary-bed .cav-capillary-collector.is-venous {
    stroke: rgba(14, 165, 233, 0.42);
}

.cav-flow-capillary-bed .cav-capillary-node {
    fill: #fff;
    stroke: rgba(100, 116, 139, 0.22);
    stroke-width: 2;
}

.cav-flow-capillary-bed .cav-capillary-rbc {
    fill: rgba(196, 38, 62, 0.76);
    stroke: rgba(148, 27, 50, 0.18);
    stroke-width: 1;
}

.cav-flow-exchange-field {
    display: block;
    padding: 10px 14px;
    overflow: hidden;
}

.cav-flow-exchange-gas,
.cav-flow-exchange-vessel {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.cav-flow-exchange-vessel {
    position: absolute;
    left: 16%;
    right: 16%;
    top: 50%;
    width: auto;
    height: 10px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(14, 165, 233, 0.1), rgba(14, 165, 233, 0.24), rgba(14, 165, 233, 0.1));
    border: 1px solid rgba(14, 165, 233, 0.28);
    transform: translateY(-50%);
}

.cav-flow-exchange-gas {
    position: absolute;
    width: 42px;
    height: 42px;
    border-radius: 999px;
    background: #fff;
    color: var(--accent-strong);
    border: 1px solid rgba(10, 132, 255, 0.2);
    font-style: normal;
    font-size: 12px;
    font-weight: 850;
}

.cav-flow-exchange-gas-left {
    left: 22%;
    top: 8px;
}

.cav-flow-exchange-gas-right {
    right: 22%;
    bottom: 8px;
}

.cav-flow-exchange-gas i {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 1;
    white-space: nowrap;
}

.cav-flow-exchange-gas-left::before {
    content: "O2";
    position: absolute;
    left: 50%;
    top: 2px;
    width: 26px;
    height: 26px;
    border-radius: 999px;
    display: grid;
    place-items: center;
    color: var(--accent-strong);
    background: rgba(240, 247, 255, 0.98);
    border: 1px solid rgba(10, 132, 255, 0.18);
    font-size: 10px;
    font-weight: 850;
    transform: translateX(-50%);
    animation: cavGasCrossDown 2.8s ease-in-out infinite;
}

.cav-flow-exchange-gas-left::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 26px;
    width: 2px;
    height: 34px;
    border-radius: 999px;
    background: rgba(10, 132, 255, 0.2);
    transform: translateX(-50%);
}

.cav-flow-exchange-gas-right::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 26px;
    width: 2px;
    height: 34px;
    border-radius: 999px;
    background: rgba(248, 113, 113, 0.22);
    transform: translateX(-50%);
}

.cav-flow-exchange-gas-right::before {
    content: "CO2";
    position: absolute;
    left: 50%;
    bottom: 2px;
    width: 28px;
    height: 26px;
    border-radius: 999px;
    display: grid;
    place-items: center;
    color: #b91c1c;
    background: rgba(254, 242, 242, 0.98);
    border: 1px solid rgba(239, 68, 68, 0.18);
    font-size: 10px;
    font-weight: 850;
    transform: translateX(-50%);
    animation: cavGasCrossUp 2.8s ease-in-out infinite;
}

@keyframes cavGasCrossDown {
    0%, 100% { transform: translateX(-50%) translateY(-8px); opacity: 0.72; }
    50% { transform: translateX(-50%) translateY(34px); opacity: 1; }
}

@keyframes cavGasCrossUp {
    0%, 100% { transform: translateX(-50%) translateY(8px); opacity: 0.72; }
    50% { transform: translateX(-50%) translateY(-34px); opacity: 1; }
}

.cav-flow-diffusion-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 12px;
    padding: 10px 12px;
    border-radius: 16px;
    background: rgba(240, 247, 255, 0.86);
    border: 1px solid rgba(10, 132, 255, 0.12);
    color: var(--muted-strong);
    font-size: 12px;
    line-height: 1.4;
    text-align: center;
}

.cav-flow-diffusion-note strong {
    color: var(--accent-strong);
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.cav-flow-variable-list {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.cav-flow-variable-list span {
    padding: 8px 10px;
    border-radius: 999px;
    background: #fff;
    color: var(--muted-strong);
    border: 1px solid rgba(15, 23, 42, 0.06);
    font-size: 12px;
    font-weight: 800;
}

.cav-flow-chain {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
    margin-top: 18px;
}

.cav-reynolds-path-chain {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
    align-items: stretch;
}

.cav-flow-chain-step {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    min-height: 62px;
    padding: 10px 14px;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.14);
    background: rgba(248, 250, 252, 0.96);
    color: var(--text);
    font-size: 14px;
    font-weight: 850;
    text-align: center;
    line-height: 1.3;
    text-wrap: balance;
}

.cav-reynolds-path-chain .cav-flow-chain-step:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -24px;
    top: 50%;
    width: 24px;
    height: 2px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.44);
    transform: translateY(-50%);
    pointer-events: none;
}

.cav-reynolds-path-chain .cav-flow-chain-step:not(:last-child)::before {
    content: "";
    position: absolute;
    right: -25px;
    top: 50%;
    width: 0;
    height: 0;
    border-left: 7px solid rgba(148, 163, 184, 0.58);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    transform: translateY(-50%);
    pointer-events: none;
}

.cav-flow-context-copy {
    margin: 4px 0 18px;
    color: var(--muted-strong);
    font-size: 17px;
    line-height: 1.55;
}

.cav-reynolds-thresholds-widget {
    justify-items: stretch;
    align-items: stretch;
    text-align: center;
}

.cav-reynolds-trap-thresholds {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    justify-items: center;
    align-items: stretch;
    margin-top: 12px;
    width: 100%;
    overflow-x: visible;
}

.cav-reynolds-bubble {
    -webkit-appearance: none;
    appearance: none;
    border: 0;
    padding: 14px 16px;
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(255,253,244,0.98), rgba(254,243,199,0.38));
    border: 1px solid rgba(245, 158, 11, 0.24);
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.05);
    color: var(--text);
    min-height: 84px;
    min-width: 0;
    width: 100%;
    max-width: none;
    display: grid;
    place-items: center;
    gap: 8px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cav-reynolds-bubble:hover,
.cav-reynolds-bubble:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 14px 26px rgba(15, 23, 42, 0.1);
}

.cav-reynolds-bubble:focus-visible {
    outline: 2px solid rgba(10, 132, 255, 0.28);
    outline-offset: 2px;
}

.cav-reynolds-bubble strong {
    font-size: 22px;
    color: #8a5a00;
    font-weight: 900;
}

.cav-reynolds-bubble span {
    margin: 0;
    font-size: 15px;
    color: var(--muted-strong);
    font-weight: 560;
    line-height: 1.3;
}

.cav-reynolds-thresholds {
    margin-top: 10px;
}

.cav-reynolds-thresholds {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin-top: 18px;
}

.cav-reynolds-thresholds div {
    padding: 14px;
    border-radius: 18px;
    background: rgba(255,255,255,0.9);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.cav-reynolds-thresholds strong,
.cav-reynolds-thresholds span {
    display: block;
}

.cav-reynolds-thresholds strong {
    color: #7f1d1d;
    font-size: 15px;
}

.cav-reynolds-thresholds span {
    margin-top: 5px;
    color: var(--muted-strong);
    font-size: 12px;
    line-height: 1.4;
}

.cav-flow-warning {
    margin-top: 18px;
    background: linear-gradient(180deg, rgba(255,250,235,0.98), rgba(255,245,222,0.94));
    border-color: rgba(229, 190, 106, 0.26);
}

.cav-flow-warning > strong {
    display: block;
    margin-bottom: 8px;
    color: #7c5a12;
    font-size: 20px;
    letter-spacing: -0.03em;
}

.cav-flow-warning p {
    color: #8c6010;
}

.cav-flow-stenosis-grid {
    margin-top: 14px;
}

.cav-stenosis-concept-card {
    margin-top: 18px;
    padding: 24px;
    border-radius: 28px;
    background: #fff;
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 20px 42px rgba(15, 23, 42, 0.08);
}

.cav-stenosis-concept-head h3 {
    margin: 8px 0 0;
    color: var(--text);
    font-size: 28px;
    letter-spacing: -0.04em;
}

.cav-stenosis-concept-head p {
    max-width: 920px;
    margin: 8px 0 0;
    color: var(--muted-strong);
    font-size: 16px;
    line-height: 1.6;
}

.cav-stenosis-simple-flow {
    display: flex;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 20px;
    padding: 14px;
    border-radius: 22px;
    background: rgba(248, 250, 252, 0.88);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.cav-stenosis-simple-flow span {
    padding: 12px 16px;
    border-radius: 999px;
    color: var(--accent-strong);
    background: rgba(240,247,255,0.98);
    border: 1px solid rgba(10, 132, 255, 0.12);
    font-size: 14px;
    font-weight: 850;
    text-align: center;
}

.cav-stenosis-simple-flow i {
    display: block;
    width: 28px;
    height: 3px;
    border-radius: 999px;
    background: rgba(10, 132, 255, 0.45);
    position: relative;
}

.cav-stenosis-simple-flow i::after {
    content: "";
    position: absolute;
    right: -1px;
    top: -4px;
    border-left: 8px solid rgba(10, 132, 255, 0.45);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
}

.cav-stenosis-equation-box {
    margin-top: 16px;
    border-radius: 20px;
    background: rgba(248, 250, 252, 0.88);
    border: 1px solid rgba(15, 23, 42, 0.06);
    overflow: hidden;
}

.cav-stenosis-equation-box summary {
    cursor: pointer;
    padding: 14px 16px;
    color: var(--text);
    font-size: 14px;
    font-weight: 850;
}

.cav-stenosis-equation-box div {
    padding: 0 16px 16px;
}

.cav-stenosis-equation-box strong {
    color: var(--accent-strong);
    font-size: 17px;
}

.cav-stenosis-equation-box p {
    margin: 8px 0 0;
    color: var(--muted-strong);
    font-size: 14px;
    line-height: 1.55;
}

.cav-stenosis-widget-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 18px;
    align-items: stretch;
    margin-top: 18px;
}

.cav-stenosis-visual,
.cav-stenosis-controls {
    border-radius: 24px;
    background: rgba(248, 250, 252, 0.88);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.cav-stenosis-visual {
    min-height: 230px;
    padding: 22px;
    display: grid;
    place-items: center;
    --stenosis-rbc-speed: 7.4s;
    --stenosis-rbc-jet-speed: 5.6s;
    --stenosis-rbc-jet-opacity: 0.18;
    --stenosis-jet-opacity: 0;
}

.cav-stenosis-vessel {
    position: relative;
    width: 100%;
    height: 92px;
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(240,247,255,0.98), rgba(255,255,255,0.98));
    border-top: 8px solid rgba(10, 132, 255, 0.22);
    border-bottom: 8px solid rgba(10, 132, 255, 0.22);
    overflow: hidden;
}

.cav-stenosis-plaque {
    position: absolute;
    left: 48%;
    width: var(--stenosis-plaque-width, 0px);
    height: 50%;
    transform: translateX(-50%);
    background: rgba(251, 146, 60, 0.32);
    transition: width 180ms ease;
    z-index: 4;
}

.cav-stenosis-plaque.is-top {
    top: 0;
    border-radius: 0 0 999px 999px;
}

.cav-stenosis-plaque.is-bottom {
    bottom: 0;
    border-radius: 999px 999px 0 0;
}

.cav-stenosis-jet {
    position: absolute;
    left: 44%;
    top: 50%;
    width: 32%;
    height: 22px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(10, 132, 255, 0), rgba(249, 115, 22, 0.2), rgba(249, 115, 22, 0));
    opacity: var(--stenosis-jet-opacity);
    transform: translateY(-50%);
    transition: opacity 180ms ease;
    z-index: 1;
}

.cav-stenosis-rbc {
    position: absolute;
    left: -40px;
    top: var(--rbc-y, 50%);
    width: 18px;
    height: 11px;
    border-radius: 999px;
    background: rgba(196, 38, 62, 0.76);
    box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.22), 0 4px 10px rgba(148, 27, 50, 0.12);
    opacity: 0;
    transform: translateY(-50%);
    animation: cavStenosisRbcFlow var(--stenosis-rbc-speed) linear infinite;
    animation-delay: var(--rbc-delay, 0s);
    z-index: 2;
}

.cav-stenosis-rbc::after {
    content: "";
    position: absolute;
    inset: 3px 5px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.28);
}

.cav-stenosis-rbc.is-jet {
    animation-duration: var(--stenosis-rbc-jet-speed);
}

.cav-stenosis-rbc.rbc-1 { --rbc-y: 42%; --rbc-delay: -0.2s; --rbc-drift: -4px; }
.cav-stenosis-rbc.rbc-2 { --rbc-y: 57%; --rbc-delay: -1.1s; --rbc-drift: 3px; }
.cav-stenosis-rbc.rbc-3 { --rbc-y: 48%; --rbc-delay: -2.1s; --rbc-drift: -1px; }
.cav-stenosis-rbc.rbc-4 { --rbc-y: 62%; --rbc-delay: -3.1s; --rbc-drift: 5px; }
.cav-stenosis-rbc.rbc-5 { --rbc-y: 38%; --rbc-delay: -4.4s; --rbc-drift: -5px; }
.cav-stenosis-rbc.rbc-6 { --rbc-y: 53%; --rbc-delay: -5.5s; --rbc-drift: 2px; }
.cav-stenosis-rbc.rbc-7 { --rbc-y: 47%; --rbc-delay: -0.7s; --rbc-drift: 0px; }
.cav-stenosis-rbc.rbc-8 { --rbc-y: 54%; --rbc-delay: -1.8s; --rbc-drift: 2px; }
.cav-stenosis-rbc.rbc-9 { --rbc-y: 44%; --rbc-delay: -2.8s; --rbc-drift: -2px; }
.cav-stenosis-rbc.rbc-10 { --rbc-y: 59%; --rbc-delay: -3.8s; --rbc-drift: 4px; }

.cav-stenosis-arrow {
    position: absolute;
    left: 12%;
    top: 50%;
    width: var(--stenosis-arrow-width, 52px);
    height: 4px;
    border-radius: 999px;
    background: var(--stenosis-arrow-color, #0a84ff);
    transform: translateY(-50%);
    opacity: 0.34;
    transition: width 180ms ease, opacity 180ms ease, background 180ms ease;
    z-index: 3;
}

.cav-stenosis-arrow::after {
    content: "";
    position: absolute;
    right: -1px;
    top: -5px;
    border-left: 10px solid var(--stenosis-arrow-color, #0a84ff);
    border-top: 7px solid transparent;
    border-bottom: 7px solid transparent;
}

.cav-stenosis-arrow.is-two { left: 30%; top: 38%; }
.cav-stenosis-arrow.is-three { left: 52%; top: 60%; opacity: var(--stenosis-extra-opacity, 0.22); }
.cav-stenosis-arrow.is-four { left: 68%; top: 44%; opacity: var(--stenosis-extra-opacity, 0.22); }

.cav-stenosis-visual[data-state="mild"] {
    --stenosis-plaque-width: 78px;
    --stenosis-arrow-width: 78px;
    --stenosis-extra-opacity: 0.52;
    --stenosis-rbc-speed: 5.2s;
    --stenosis-rbc-jet-speed: 3.1s;
    --stenosis-rbc-jet-opacity: 0.72;
    --stenosis-jet-opacity: 1;
}

.cav-stenosis-visual[data-state="severe"] {
    --stenosis-plaque-width: 138px;
    --stenosis-arrow-width: 112px;
    --stenosis-extra-opacity: 0.88;
    --stenosis-arrow-color: #f97316;
    --stenosis-rbc-speed: 4.2s;
    --stenosis-rbc-jet-speed: 1.85s;
    --stenosis-rbc-jet-opacity: 1;
    --stenosis-jet-opacity: 1;
}

.cav-stenosis-visual[data-state="normal"] .cav-stenosis-rbc.is-jet {
    animation: none;
    visibility: hidden;
}

@keyframes cavStenosisRbcFlow {
    0% {
        opacity: 0;
        transform: translateX(-42px) translateY(-50%) rotate(-8deg) scale(0.92);
    }
    8% {
        opacity: 0.76;
    }
    43% {
        transform: translateX(410px) translateY(calc(-50% + var(--rbc-drift, 0px))) rotate(-2deg) scale(1);
    }
    53% {
        opacity: 0.86;
        transform: translateX(500px) translateY(-50%) rotate(3deg) scaleX(1.22);
    }
    76% {
        opacity: 0.74;
        transform: translateX(700px) translateY(calc(-50% + var(--rbc-drift, 0px))) rotate(6deg) scaleX(1);
    }
    100% {
        opacity: 0;
        transform: translateX(960px) translateY(-50%) rotate(9deg) scale(0.94);
    }
}

.cav-stenosis-controls {
    padding: 20px;
    display: grid;
    align-content: center;
    gap: 14px;
}

.cav-stenosis-controls label {
    color: var(--text);
    font-size: 14px;
    font-weight: 850;
}

.cav-stenosis-controls input {
    width: 100%;
    accent-color: var(--accent);
}

.cav-stenosis-options {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 800;
}

.cav-stenosis-controls p {
    margin: 0;
    padding: 14px;
    border-radius: 18px;
    background: #fff;
    color: var(--accent-strong);
    border: 1px solid rgba(10, 132, 255, 0.12);
    font-size: 15px;
    font-weight: 850;
    text-align: center;
}

.cav-stenosis-controls p.is-turbulent {
    color: #c2410c;
    border-color: rgba(249, 115, 22, 0.18);
    background: rgba(255, 247, 237, 0.9);
}

.cav-stenosis-trap-pill {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    width: fit-content;
    max-width: 100%;
    margin: 16px auto 0;
    padding: 10px 14px;
    border-radius: 999px;
    color: #8c6010;
    background: rgba(255, 250, 235, 0.96);
    border: 1px solid rgba(229, 190, 106, 0.28);
    font-size: 12px;
    font-weight: 800;
    line-height: 1.35;
    text-align: center;
}

.cav-stenosis-trap-pill strong {
    color: #7c5a12;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.cav-stenosis-final-pill {
    width: fit-content;
    margin: 18px auto 0;
    padding: 12px 18px;
    border-radius: 999px;
    color: var(--accent-strong);
    background: rgba(240,247,255,0.98);
    border: 1px solid rgba(10, 132, 255, 0.14);
    font-size: 15px;
    font-weight: 850;
    text-align: center;
}

.cav-circuitry-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin-top: 18px;
}

.cav-circuit-card {
    padding: 24px;
    border-radius: 24px;
    background: #fff;
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.06);
}

.cav-circuit-card-head {
    display: grid;
    gap: 10px;
}

.cav-circuit-card h4,
.cav-nephrectomy-alert h4 {
    margin: 0;
    color: var(--text);
    font-size: 24px;
    letter-spacing: -0.04em;
}

.cav-nephrectomy-alert h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.cav-nephrectomy-alert h4 span {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(255, 247, 237, 0.96);
    border: 1px solid rgba(245, 158, 11, 0.24);
    color: #8a5a00;
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.cav-circuit-card p,
.cav-nephrectomy-alert p {
    margin: 14px 0 0;
    color: var(--muted-strong);
    font-size: 15px;
    line-height: 1.65;
}

.cav-nephrectomy-points {
    display: grid;
    gap: 12px;
    margin: 18px 0 0;
    padding: 0;
    list-style: none;
}

.cav-nephrectomy-points li {
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.74);
    border: 1px solid rgba(245, 158, 11, 0.16);
    color: var(--muted-strong);
    font-size: 17px;
    font-weight: 760;
    line-height: 1.35;
}

.cav-nephrectomy-points strong {
    color: var(--text);
    font-weight: 900;
}

.cav-circuit-equation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    flex-wrap: wrap;
    min-height: 92px;
    margin-top: 18px;
    padding: 18px;
    border-radius: 22px;
    color: var(--accent-strong);
    background: linear-gradient(180deg, rgba(240, 247, 255, 0.96), rgba(255, 255, 255, 0.98));
    border: 1px solid rgba(10, 132, 255, 0.12);
    font-size: 22px;
    font-weight: 850;
    line-height: 1.25;
    text-align: center;
}

.cav-circuit-fraction {
    display: inline-grid;
    justify-items: center;
    gap: 3px;
    min-width: 54px;
    line-height: 1;
}

.cav-circuit-fraction span:nth-child(2) {
    width: 100%;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
}

.cav-nephrectomy-alert {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 0.86fr);
    gap: 18px;
    margin-top: 18px;
    padding: 24px;
    border-radius: 24px;
    background: rgba(255, 251, 235, 0.92);
    border: 1px solid rgba(245, 158, 11, 0.18);
    border-left: 5px solid #f59e0b;
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.05);
}

.cav-nephrectomy-math {
    display: grid;
    gap: 12px;
}

.cav-nephrectomy-math div {
    padding: 16px;
    border-radius: 20px;
    background: #fff;
    border: 1px solid rgba(245, 158, 11, 0.18);
    box-shadow: 0 10px 20px rgba(15, 23, 42, 0.04);
}

.cav-nephrectomy-math strong,
.cav-nephrectomy-math span,
.cav-nephrectomy-math b {
    display: block;
}

.cav-nephrectomy-math strong {
    color: #7c5a12;
    font-size: 13px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.cav-nephrectomy-math span {
    margin-top: 8px;
    color: var(--muted-strong);
    font-size: 15px;
    font-weight: 750;
    line-height: 1.45;
}

.cav-nephrectomy-math b {
    margin-top: 8px;
    color: #8c6010;
    font-size: 22px;
    letter-spacing: -0.04em;
}

.cav-circuit-calculator {
    display: grid;
    gap: 16px;
    margin-top: 18px;
    padding: 24px;
    border-radius: 28px;
    background: #fff;
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.06);
}

.cav-circuit-calculator-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
}

.cav-circuit-calculator-head h4 {
    margin: 6px 0 0;
    color: var(--text);
    font-size: 24px;
    letter-spacing: -0.04em;
}

.cav-circuit-calculator-head > span {
    padding: 9px 12px;
    border-radius: 999px;
    color: var(--accent-strong);
    background: rgba(240, 247, 255, 0.98);
    border: 1px solid rgba(10, 132, 255, 0.14);
    font-size: 12px;
    font-weight: 850;
}

.cav-circuit-calculator-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.cav-circuit-control-panel {
    display: grid;
    gap: 14px;
    padding: 18px;
    border-radius: 24px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.cav-circuit-control-head strong,
.cav-circuit-control-head span {
    display: block;
}

.cav-circuit-control-head strong {
    color: var(--text);
    font-size: 18px;
    letter-spacing: -0.03em;
}

.cav-circuit-control-head span {
    margin-top: 5px;
    color: var(--muted-strong);
    font-size: 13px;
    line-height: 1.45;
}

.cav-circuit-count-row {
    display: grid;
    grid-template-columns: 42px 1fr 42px;
    align-items: center;
    gap: 10px;
}

.cav-circuit-count-row button {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid rgba(10, 132, 255, 0.16);
    background: #fff;
    color: var(--accent-strong);
    font-size: 24px;
    font-weight: 850;
    cursor: pointer;
}

.cav-circuit-count-row span {
    min-height: 42px;
    display: grid;
    place-items: center;
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(240, 247, 255, 0.96), rgba(255, 255, 255, 0.98));
    border: 1px solid rgba(10, 132, 255, 0.12);
    color: var(--text);
    font-size: 16px;
    font-weight: 850;
}

.cav-circuit-live-equation {
    min-height: 58px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid rgba(15, 23, 42, 0.06);
    color: var(--muted-strong);
    font-size: 15px;
    font-weight: 750;
    line-height: 1.35;
    text-align: center;
}

.cav-circuit-live-result {
    display: grid;
    gap: 4px;
    padding: 16px;
    border-radius: 20px;
    background: rgba(255, 251, 235, 0.92);
    border: 1px solid rgba(245, 158, 11, 0.18);
}

.cav-circuit-live-result span {
    color: #7c5a12;
    font-size: 12px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.cav-circuit-live-result strong {
    color: #8c6010;
    font-size: 30px;
    letter-spacing: -0.04em;
}

.cav-organ-perfusion-engine {
    display: grid;
    gap: 18px;
    min-height: 600px;
    margin-top: 18px;
    padding: 24px;
    border-radius: 28px;
    background: #fff;
    border: 1px solid rgba(15, 23, 42, 0.10);
    box-shadow: 0 18px 38px rgba(15, 23, 42, 0.07);
}

.cav-organ-engine-head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 18px;
    align-items: start;
}

.cav-organ-engine-head h4 {
    margin: 6px 0 0;
    color: var(--text);
    font-size: 26px;
    letter-spacing: -0.04em;
}

.cav-organ-engine-head p {
    max-width: 720px;
    margin: 8px 0 0;
    color: var(--muted-strong);
    font-size: 15px;
    line-height: 1.55;
}

.cav-organ-engine-toggle {
    display: inline-flex;
    gap: 4px;
    padding: 5px;
    border-radius: 999px;
    background: rgba(248, 250, 252, 0.96);
    border: 1px solid rgba(15, 23, 42, 0.08);
}

.cav-organ-engine-toggle button {
    border: 0;
    border-radius: 999px;
    padding: 11px 16px;
    background: transparent;
    color: var(--muted);
    font-size: 13px;
    font-weight: 850;
    cursor: pointer;
}

.cav-organ-engine-toggle button span {
    display: block;
    margin-top: 2px;
    font-size: 10px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.cav-organ-engine-toggle button.is-active {
    color: #fff;
    background: var(--accent);
    box-shadow: 0 10px 22px rgba(10, 132, 255, 0.22);
}

.cav-organ-engine-panel {
    display: none;
    gap: 16px;
}

.cav-organ-engine-panel.is-active {
    display: grid;
}

.cav-series-visual,
.cav-parallel-visual {
    min-height: 300px;
    border-radius: 24px;
    background: linear-gradient(180deg, rgba(240, 247, 255, 0.74), rgba(255, 255, 255, 0.96));
    border: 1px solid rgba(10, 132, 255, 0.12);
    overflow: hidden;
}

.cav-series-visual svg,
.cav-parallel-visual svg {
    display: block;
    width: 100%;
    height: 100%;
    min-height: 300px;
}

.cav-series-vessel-wall {
    fill: none;
    stroke: rgba(148, 163, 184, 0.18);
    stroke-width: var(--series-wall-width, 54);
    stroke-linecap: round;
    transition: stroke-width 180ms ease, opacity 180ms ease;
}

.cav-series-vessel-wall.is-artery {
    --series-wall-width: 74;
    stroke: rgba(239, 68, 68, 0.18);
}

.cav-series-vessel-wall.is-arteriole {
    --series-wall-width: 54;
    stroke: rgba(249, 115, 22, 0.18);
}

.cav-series-vessel-wall.is-capillary {
    --series-wall-width: 34;
    stroke: rgba(14, 165, 233, 0.18);
}

.cav-series-segment {
    fill: none;
    stroke: url(#cavSeriesFlowGradient);
    stroke-width: var(--series-lumen-width, 34);
    stroke-linecap: round;
    transition: stroke-width 180ms ease, opacity 180ms ease;
}

.cav-series-segment.is-artery {
    --series-lumen-width: 52;
}

.cav-series-segment.is-arteriole {
    --series-lumen-width: 34;
}

.cav-series-segment.is-capillary {
    --series-lumen-width: 18;
}

.cav-series-rbc-flow {
    --series-rbc-duration: 4.8s;
}

.cav-series-rbc {
    transform: translate(-40px, 125px);
    animation: cavSeriesRbcMove var(--series-rbc-duration) linear infinite;
    animation-delay: var(--series-rbc-delay, 0s);
}

.cav-series-rbc ellipse:first-child {
    fill: rgba(196, 38, 62, 0.82);
    stroke: rgba(148, 27, 50, 0.18);
    stroke-width: 1;
}

.cav-series-rbc ellipse:last-child {
    fill: rgba(255, 255, 255, 0.28);
}

.cav-series-rbc.rbc-1 { --series-rbc-delay: -0.1s; }
.cav-series-rbc.rbc-2 { --series-rbc-delay: -0.45s; }
.cav-series-rbc.rbc-3 { --series-rbc-delay: -0.8s; }
.cav-series-rbc.rbc-4 { --series-rbc-delay: -1.15s; }
.cav-series-rbc.rbc-5 { --series-rbc-delay: -1.5s; }
.cav-series-rbc.rbc-6 { --series-rbc-delay: -1.85s; }
.cav-series-rbc.rbc-7 { --series-rbc-delay: -2.2s; }
.cav-series-rbc.rbc-8 { --series-rbc-delay: -2.55s; }
.cav-series-rbc.rbc-9 { --series-rbc-delay: -2.9s; }
.cav-series-rbc.rbc-10 { --series-rbc-delay: -3.25s; }
.cav-series-rbc.rbc-11 { --series-rbc-delay: -3.6s; }
.cav-series-rbc.rbc-12 { --series-rbc-delay: -3.95s; }
.cav-series-rbc.rbc-13 { --series-rbc-delay: -4.3s; }
.cav-series-rbc.rbc-14 { --series-rbc-delay: -4.65s; }
.cav-series-rbc.rbc-15 { --series-rbc-delay: -5s; }
.cav-series-rbc.rbc-16 { --series-rbc-delay: -5.35s; }

@keyframes cavSeriesRbcMove {
    0% { transform: translate(30px, 125px) rotate(-6deg) scaleX(1); opacity: 0; }
    8% { opacity: 0.85; }
    34% { transform: translate(250px, 119px) rotate(-2deg) scaleX(1); }
    48% { transform: translate(382px, 125px) rotate(4deg) scaleX(0.78); }
    66% { transform: translate(505px, 132px) rotate(2deg) scaleX(0.92); }
    92% { opacity: 0.85; }
    100% { transform: translate(710px, 125px) rotate(8deg) scaleX(1); opacity: 0; }
}

.cav-series-visual circle {
    fill: #fff;
    stroke: rgba(10, 132, 255, 0.2);
    stroke-width: 3;
}

.cav-series-visual text,
.cav-parallel-visual text {
    fill: var(--muted-strong);
    font-size: 18px;
    font-weight: 850;
    text-anchor: middle;
}

.cav-series-controls {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.cav-series-controls label {
    display: grid;
    gap: 10px;
    padding: 14px;
    border-radius: 20px;
    background: rgba(248, 250, 252, 0.92);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.cav-series-controls span {
    color: var(--text);
    font-size: 13px;
    font-weight: 850;
}

.cav-series-controls input {
    width: 100%;
    accent-color: var(--accent);
}

.cav-organ-engine-math {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    row-gap: 4px;
    column-gap: 12px;
    padding: 16px;
    border-radius: 22px;
    background: rgba(255, 251, 235, 0.92);
    border: 1px solid rgba(245, 158, 11, 0.18);
}

.cav-organ-engine-math span {
    color: #7c5a12;
    font-size: 28px;
    font-weight: 850;
    letter-spacing: -0.04em;
    line-height: 1.1;
}

.cav-organ-engine-math strong {
    justify-self: end;
    color: #8c6010;
    font-size: 24px;
    letter-spacing: -0.05em;
    margin-top: -2px;
}

.cav-aorta,
.cav-parallel-branch {
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: opacity 180ms ease, stroke 180ms ease, filter 180ms ease;
}

.cav-aorta {
    stroke: rgba(239, 68, 68, 0.44);
    stroke-width: 28;
}

.cav-parallel-branch {
    stroke: url(#cavParallelBranchGradient);
    stroke-width: 16;
}

.cav-parallel-branch.is-off {
    stroke: rgba(148, 163, 184, 0.34);
    opacity: 0.42;
}

.cav-parallel-rbc-flow {
    --parallel-rbc-duration: 3.8s;
    opacity: 1;
    transition: opacity 180ms ease;
}

.cav-parallel-rbc-flow.is-off {
    opacity: 0;
}

.cav-parallel-rbc {
    transform: translate(88px, 84px);
    animation: cavParallelRenalRbc var(--parallel-rbc-duration) linear infinite;
    animation-delay: var(--parallel-rbc-delay, 0s);
}

.cav-parallel-rbc-flow[data-parallel-flow="gi"] .cav-parallel-rbc {
    animation-name: cavParallelGiRbc;
}

.cav-parallel-rbc-flow[data-parallel-flow="muscle"] .cav-parallel-rbc {
    animation-name: cavParallelMuscleRbc;
}

.cav-parallel-rbc-flow[data-parallel-flow="skin"] .cav-parallel-rbc {
    animation-name: cavParallelSkinRbc;
}

.cav-parallel-rbc ellipse:first-child {
    fill: rgba(196, 38, 62, 0.82);
    stroke: rgba(148, 27, 50, 0.16);
    stroke-width: 1;
}

.cav-parallel-rbc ellipse:last-child {
    fill: rgba(255, 255, 255, 0.28);
}

.cav-parallel-rbc.rbc-1 { --parallel-rbc-delay: -0.2s; }
.cav-parallel-rbc.rbc-2 { --parallel-rbc-delay: -1.35s; }
.cav-parallel-rbc.rbc-3 { --parallel-rbc-delay: -2.55s; }

.cav-organ-perfusion-engine[data-parallel-load="3"] .cav-parallel-rbc-flow:not(.is-off) {
    --parallel-rbc-duration: 3s;
}

.cav-organ-perfusion-engine[data-parallel-load="2"] .cav-parallel-rbc-flow:not(.is-off) {
    --parallel-rbc-duration: 2.35s;
}

.cav-organ-perfusion-engine[data-parallel-load="1"] .cav-parallel-rbc-flow:not(.is-off) {
    --parallel-rbc-duration: 1.8s;
}

@keyframes cavParallelRenalRbc {
    0% { transform: translate(90px, 56px) rotate(90deg); opacity: 0; }
    10%, 90% { opacity: 0.86; }
    28% { transform: translate(90px, 84px) rotate(90deg); }
    46% { transform: translate(170px, 82px) rotate(-6deg); }
    70% { transform: translate(300px, 42px) rotate(2deg); }
    100% { transform: translate(606px, 42px) rotate(4deg); opacity: 0; }
}

@keyframes cavParallelGiRbc {
    0% { transform: translate(90px, 56px) rotate(90deg); opacity: 0; }
    10%, 90% { opacity: 0.86; }
    38% { transform: translate(90px, 142px) rotate(90deg); }
    54% { transform: translate(170px, 140px) rotate(-4deg); }
    75% { transform: translate(300px, 122px) rotate(2deg); }
    100% { transform: translate(606px, 122px) rotate(4deg); opacity: 0; }
}

@keyframes cavParallelMuscleRbc {
    0% { transform: translate(90px, 56px) rotate(90deg); opacity: 0; }
    10%, 90% { opacity: 0.86; }
    48% { transform: translate(90px, 220px) rotate(90deg); }
    62% { transform: translate(170px, 222px) rotate(4deg); }
    80% { transform: translate(300px, 238px) rotate(2deg); }
    100% { transform: translate(606px, 238px) rotate(4deg); opacity: 0; }
}

@keyframes cavParallelSkinRbc {
    0% { transform: translate(90px, 56px) rotate(90deg); opacity: 0; }
    10%, 90% { opacity: 0.86; }
    58% { transform: translate(90px, 278px) rotate(90deg); }
    72% { transform: translate(170px, 286px) rotate(8deg); }
    86% { transform: translate(300px, 318px) rotate(2deg); }
    100% { transform: translate(606px, 318px) rotate(4deg); opacity: 0; }
}

.cav-organ-node ellipse,
.cav-organ-node rect {
    fill: #fff;
    stroke: rgba(10, 132, 255, 0.18);
    stroke-width: 2;
    filter: drop-shadow(0 8px 14px rgba(15, 23, 42, 0.08));
    transition: fill 180ms ease, stroke 180ms ease, opacity 180ms ease;
}

.cav-organ-node text {
    fill: var(--text);
    font-size: 14px;
}

.cav-organ-node.is-off ellipse,
.cav-organ-node.is-off rect {
    fill: rgba(241, 245, 249, 0.94);
    stroke: rgba(148, 163, 184, 0.28);
    opacity: 0.62;
}

.cav-organ-node.is-off text {
    fill: rgba(100, 116, 139, 0.8);
    text-decoration: line-through;
}

.cav-aorta-label {
    fill: #b91c1c;
    font-size: 15px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.cav-organ-switch-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.cav-organ-switch-grid button {
    border: 1px solid rgba(10, 132, 255, 0.14);
    border-radius: 18px;
    padding: 13px 12px;
    background: rgba(240, 247, 255, 0.96);
    color: var(--accent-strong);
    font-size: 13px;
    font-weight: 850;
    cursor: pointer;
    transition: background 180ms ease, color 180ms ease, border 180ms ease;
}

.cav-organ-switch-grid button span {
    display: block;
    margin-top: 4px;
    font-size: 11px;
    letter-spacing: 0.08em;
}

.cav-organ-switch-grid button:not(.is-on) {
    background: rgba(248, 250, 252, 0.96);
    color: var(--muted);
    border-color: rgba(148, 163, 184, 0.2);
}

.cav-organ-engine-alert {
    padding: 13px 16px;
    border-radius: 18px;
    background: rgba(254, 242, 242, 0.96);
    border: 1px solid rgba(239, 68, 68, 0.18);
    color: #b91c1c;
    font-size: 14px;
    font-weight: 850;
    text-align: center;
}

@media (max-width: 820px) {
    .cav-equation-card,
    .cav-hemo-head,
    .cav-vessel-comparison,
    .cav-flow-equation-card,
    .cav-flow-trap-card,
    .cav-flow-reynolds-card {
        grid-template-columns: 1fr;
    }

    .cav-hemo-canvas-shell {
        aspect-ratio: 4 / 3;
        min-height: 260px;
    }

    .cav-hemo-visual-row {
        grid-template-columns: 1fr;
    }

    .cav-flow-equation {
        font-size: 38px;
    }

    .cav-flow-mini-grid,
    .cav-flow-chain,
    .cav-reynolds-path-chain,
    .cav-stenosis-widget-grid,
    .cav-circuitry-grid,
    .cav-circuit-calculator-grid,
    .cav-nephrectomy-alert,
    .cav-organ-engine-head,
    .cav-series-controls,
    .cav-organ-switch-grid {
        grid-template-columns: 1fr;
    }

    .cav-reynolds-trap-thresholds {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        width: 100%;
        gap: 10px;
        overflow-x: visible;
    }

    .cav-reynolds-bubble {
        min-height: 76px;
        padding: 12px 10px;
        font-size: 14px;
    }

    .cav-reynolds-bubble strong {
        font-size: 20px;
    }

    .cav-reynolds-bubble span {
        font-size: 14px;
    }

    .cav-reynolds-path-chain .cav-flow-chain-step:not(:last-child)::after {
        right: 50%;
        top: auto;
        bottom: -20px;
        transform: translateX(50%);
        content: "↓";
    }
}