.cv-density-lab { margin: 2.5rem 0; padding: clamp(1rem,3vw,2rem); border: 2px solid var(--ink); border-radius: 17px; background: var(--white); color: var(--ink); min-width: 0; scroll-margin-top: 7rem; }
.article-body .cv-density-lab h2 { margin: .35rem 0 1rem; font-size: clamp(1.5rem,4vw,2rem); line-height: 1.25; }
.article-body .cv-density-lab h3 { margin: 0 0 .7rem; font-size: 1.2rem; line-height: 1.4; }
.article-body .cv-density-lab p { font-size: 1rem; line-height: 1.65; }
.article-body .cv-density-lab .cv-density-kicker { margin: 0 0 .4rem; font-size: .8rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-2); }
.cv-density-lab [hidden] { display: none !important; }
.cv-density-controls { margin: 1.5rem 0; }
.cv-density-controls fieldset { margin: 0; padding: 0; border: 0; min-width: 0; }
.cv-density-controls legend { font-size: 1.05rem; font-weight: 800; padding: 0 0 .8rem; }
.cv-density-fields { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; align-items: end; }
.cv-density-controls label { display: block; min-width: 0; font-size: 1rem; font-weight: 700; }
.cv-density-controls input, .cv-density-controls select { display: block; width: 100%; min-width: 0; min-height: 48px; font: inherit; margin: .4rem 0; }
.cv-density-controls input { accent-color: var(--ink); cursor: pointer; padding: .5rem 0; }
.cv-density-controls select { padding: .6rem; color: var(--ink); background: #fff; border: 1px solid #678478; border-radius: 7px; }
.cv-density-preview { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: .65rem; margin: .8rem 0 1rem; }
.cv-density-preview > div { display: flex; flex-direction: column; justify-content: space-between; min-width: 0; padding: .5rem .7rem; border-left: 3px solid var(--ink); background: #e8f0d3; }
.cv-density-preview span { font-size: .875rem; }
.cv-density-preview strong { font-size: 1.35rem; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.cv-density-presets { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: .65rem; }
.cv-density-presets button { min-height: 48px; font-size: .9375rem; white-space: normal; padding: .7rem .5rem; }
.cv-density-lab :disabled { opacity: .55; cursor: not-allowed; }
.cv-density-lab :focus-visible { outline: 3px solid var(--ink); outline-offset: 4px; }
.article-body .cv-density-lab .cv-density-help { font-size: .9375rem; color: #42594e; margin: .7rem 0; }
.cv-density-workspace { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1.5rem; margin: 1.5rem 0; align-items: start; }
.cv-density-workspace > div { min-width: 0; }
.cv-density-formula { border-left: 3px solid var(--ink); padding: .7rem .8rem; background: #f1f3e5; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.cv-density-reason, .cv-density-question details { border: 1px solid var(--line-strong); border-radius: 9px; background: var(--paper); margin-top: 1.5rem; }
.cv-density-lab summary { min-height: 48px; padding: .85rem 1rem; font-weight: 750; font-size: 1rem; cursor: pointer; }
.cv-density-lab details p { margin: .4rem 1rem 1rem; }
.cv-density-question { border-top: 1px solid var(--line-strong); padding-top: 1.5rem; margin-top: 1.5rem; }
.cv-density-question details { margin-top: .75rem; }
.cv-density-error { border: 1px solid #9b281d; color: #792116; background: #fff0eb; padding: .8rem; }
.cv-density-status { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
@media(max-width:760px) { .cv-density-workspace { grid-template-columns: minmax(0,1fr); } }
@media(max-width:620px) { .cv-density-fields { grid-template-columns: minmax(0,1fr); } .cv-density-presets { grid-template-columns: repeat(2,minmax(0,1fr)); } .cv-density-preview { grid-template-columns: repeat(2,minmax(0,1fr)); } }
@media(max-width:380px) { .cv-density-preview strong { font-size: 1.05rem; } }
.cv-density-comparison { border-left: 3px solid var(--ink); background: #f1f3e5; padding: .8rem 1rem; }
.cv-density-samples { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: clamp(.6rem,2vw,1.2rem); margin: 1.5rem 0; }
.cv-density-sample { min-width: 0; border: 2px solid #899f94; border-radius: 10px; background: #f8f9f1; padding: clamp(.6rem,2vw,1.2rem); }
.cv-density-sample.is-b { border: 2px solid #8a461a; background: #fff8ec; }
.cv-density-sample header { min-height: 5rem; }
.article-body .cv-density-sample h3 { font-size: clamp(1rem,2vw,1.2rem); margin: 0; }
.article-body .cv-density-sample header p { font-size: .875rem; margin: .3rem 0 .8rem; }
.cv-density-vessel { display: grid; grid-template-columns: 32px minmax(0,1fr); gap: .35rem; height: 176px; max-width: 140px; margin: .5rem auto 1rem; }
.cv-density-ruler { display: flex; flex-direction: column; justify-content: space-between; align-items: end; font-size: .75rem; line-height: 1; }
.cv-density-ruler span:first-child { transform: translateY(-50%); }
.cv-density-ruler span:last-child { transform: translateY(50%); }
.cv-density-tank { position: relative; border: 2px solid #446c5d; border-top: 0; background: #fff; }
.cv-density-tank i { position: absolute; bottom: 0; left: 0; width: 100%; background: #53ae97; border-top: 2px solid #276652; }
.cv-density-sample.is-b .cv-density-tank i { background: repeating-linear-gradient(135deg,#e2a263 0 6px,#edb880 6px 12px); border-top-color: #8a461a; }
.article-body .cv-density-sample .cv-density-measure { margin: .5rem 0; line-height: 1.4; }
.cv-density-measure span, .cv-density-badge span { display: block; font-size: .875rem; }
.cv-density-measure strong, .cv-density-badge strong { display: block; font-size: clamp(1rem,2vw,1.25rem); font-variant-numeric: tabular-nums; }
.cv-density-mass-track { height: 16px; background: #e2eadd; }
.cv-density-mass-track i { display: block; height: 100%; background: #286b60; }
.cv-density-sample.is-b .cv-density-mass-track i { background: repeating-linear-gradient(135deg,#a45b26 0 4px,#c17c40 4px 8px); }
.cv-density-mass-axis { display: flex; justify-content: space-between; font-size: .75rem; margin-top: .25rem; }
.article-body .cv-density-sample .cv-density-badge { margin: .8rem 0 0; padding-top: .6rem; border-top: 1px solid #aabcab; line-height: 1.4; }
.cv-density-takeaway { border-left: 3px solid #a85924; padding: .8rem 1rem; background: #fff2e4; }