:root { --article-paper: #f1efe9; --article-ink: #171717; --article-orange: #ff6900; }

.article-main { overflow: hidden; background: var(--article-paper); color: var(--article-ink); }
.article-hero { padding: clamp(90px, 12vw, 155px) clamp(20px, 10vw, 155px) clamp(65px, 8vw, 110px); background: #202020; color: #fff; }
.article-hero-inner { width: min(100%, 1020px); }
.article-back { display: inline-flex; margin-bottom: clamp(40px, 7vw, 75px); color: #bdbdbd; font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
.article-back:hover { color: var(--article-orange); }
.article-category,.article-aside-label { margin: 0 0 18px; color: var(--article-orange); font-size: 10px; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; }
.article-hero h1 { max-width: 1040px; margin: 0; font: 600 clamp(48px, 7.3vw, 108px)/.9 "Space Grotesk", Arial, sans-serif; letter-spacing: -.065em; text-wrap: balance; }
.article-dek { max-width: 760px; margin: 34px 0 0; color: #d0d0d0; font-size: clamp(17px, 1.8vw, 23px); line-height: 1.5; }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-top: 34px; color: #9f9f9f; font-size: 10px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.article-layout { display: grid; grid-template-columns: minmax(210px, .65fr) minmax(0, 1.65fr); gap: clamp(45px, 9vw, 140px); width: min(100% - 40px, 1120px); margin: 0 auto; padding: clamp(70px, 10vw, 130px) 0; }
.article-aside { position: sticky; top: 115px; align-self: start; }
.article-aside ol { display: grid; gap: 13px; margin: 0; padding: 0 0 0 17px; color: #666; font-size: 12px; line-height: 1.45; }
.article-aside a:hover { color: var(--article-orange); }
.article-disclaimer { margin: 34px 0 0; padding-top: 23px; border-top: 1px solid rgba(0,0,0,.17); color: #737373; font-size: 11px; line-height: 1.55; }
.article-content { min-width: 0; }
.article-section { padding: 0 0 48px; margin-bottom: 48px; border-bottom: 1px solid rgba(0,0,0,.16); }
.article-section:last-child { margin-bottom: 0; }
.article-section h2 { margin: 0 0 24px; font: 600 clamp(30px, 3.6vw, 48px)/.98 "Space Grotesk", Arial, sans-serif; letter-spacing: -.055em; }
.article-section p { max-width: 760px; margin: 0 0 19px; color: #3f3f3f; font-size: clamp(16px, 1.3vw, 18px); line-height: 1.72; }
.article-callout { margin: 30px 0 0; padding: 24px 26px; border-left: 5px solid var(--article-orange); background: #dfddd6; color: #242424; font: 600 18px/1.45 "Space Grotesk", Arial, sans-serif; }
.article-visual { margin: 0 0 52px; padding: clamp(24px, 4vw, 42px); background: #202020; color: #fff; }
.article-visual figcaption { margin-bottom: 32px; }
.article-visual figcaption > span { display: block; margin-bottom: 12px; color: var(--article-orange); font-size: 9px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.article-visual figcaption h3 { max-width: 680px; margin: 0 0 10px; font: 600 clamp(24px, 3vw, 38px)/1 "Space Grotesk", Arial, sans-serif; letter-spacing: -.045em; }
.article-visual figcaption p { max-width: 620px; margin: 0; color: #b9b9b9; font-size: 12px; line-height: 1.5; }
.visual-bars { display: grid; gap: 18px; }
.visual-scale-label { display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: center; color: #969696; font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.visual-scale-label b { color: #d3d3d3; font-size: 10px; font-weight: 700; text-align: center; }
.visual-bar-row { display: grid; grid-template-columns: minmax(135px, .42fr) 1fr; gap: 20px; align-items: center; }
.visual-bar-row > div:first-child { display: grid; }
.visual-bar-row b { font: 600 14px/1.2 "Space Grotesk", Arial, sans-serif; }
.visual-bar-row small { color: #969696; font-size: 10px; }
.visual-bar-track { height: 18px; background: #373737; overflow: hidden; }
.visual-bar-track i { display: block; height: 100%; background: var(--article-orange); }
.visual-steps,.visual-comparison { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid #4b4b4b; border-left: 1px solid #4b4b4b; }
.visual-steps > div,.visual-comparison > div { min-height: 150px; padding: 22px; border-right: 1px solid #4b4b4b; border-bottom: 1px solid #4b4b4b; }
.visual-steps span,.visual-comparison span { color: var(--article-orange); font-size: 10px; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; }
.visual-steps h4,.visual-comparison h4 { margin: 32px 0 8px; font: 600 20px/1 "Space Grotesk", Arial, sans-serif; letter-spacing: -.04em; }
.visual-steps p,.visual-comparison p { margin: 0; color: #aaa; font-size: 11px; line-height: 1.45; }
.visual-pyramid { display: grid; justify-items: center; gap: 3px; }
.visual-pyramid > div { display: flex; min-height: 70px; align-items: center; justify-content: space-between; gap: 18px; padding: 15px 20px; background: #343434; }
.visual-pyramid > div:last-child { background: var(--article-orange); color: #151515; }
.visual-pyramid b { font: 600 16px/1 "Space Grotesk", Arial, sans-serif; }
.visual-pyramid span { max-width: 230px; color: #bcbcbc; font-size: 10px; text-align: right; }
.visual-pyramid > div:last-child span { color: #252525; }
.visual-line-chart { display: block; width: 100%; min-height: 245px; overflow: visible; }
.visual-line-chart .chart-grid line { stroke: #464646; stroke-width: 1; }
.visual-line-chart .chart-axis { stroke: #888; stroke-width: 1.5; }
.visual-line-chart polyline { fill: none; stroke: var(--article-orange); stroke-width: 5; stroke-linecap: square; stroke-linejoin: round; }
.visual-line-chart .chart-points circle { fill: #202020; stroke: #fff; stroke-width: 3; }
.visual-line-chart text { fill: #b7b7b7; font: 11px "DM Sans", Arial, sans-serif; }
.visual-line-chart .chart-axis-title { fill: #f1f1f1; font-weight: 700; }
.energy-chart-legend { display: flex; flex-wrap: wrap; gap: 12px 24px; margin: 0 0 20px; }
.energy-chart-legend span { display: inline-flex; align-items: center; gap: 9px; color: #d7d7d7; font-size: 12px; font-weight: 700; }
.energy-chart-legend i { width: 30px; height: 4px; background: currentColor; }
.energy-series--phosphagen { color: var(--article-orange); }
.energy-series--glycolytic { color: #f1f1f1; }
.energy-series--oxidative { color: #54a9ff; }
.energy-series--glycolytic i { background: repeating-linear-gradient(90deg, currentColor 0 8px, transparent 8px 13px); }
.energy-series--oxidative i { height: 0; border-top: 4px dotted currentColor; background: transparent; }
.energy-chart-viewport { width: 100%; overflow-x: auto; overflow-y: hidden; }
.energy-systems-chart { display: block; width: 100%; min-width: 560px; }
.energy-chart-grid line { stroke: #464646; stroke-width: 1; }
.energy-chart-grid text,.energy-chart-x-ticks text { fill: #bdbdbd; font: 13px "DM Sans", Arial, sans-serif; }
.energy-chart-x-ticks line,.energy-chart-axis { stroke: #888; stroke-width: 1.5; }
.energy-chart-axis-title { fill: #f4f4f4; font: 700 14px "DM Sans", Arial, sans-serif; letter-spacing: .02em; }
.energy-series polyline { fill: none; stroke: currentColor; stroke-width: 5; stroke-linecap: round; stroke-linejoin: round; }
.energy-series circle { fill: #202020; stroke: currentColor; stroke-width: 4; }
.energy-series--glycolytic polyline { stroke-dasharray: 12 8; }
.energy-series--oxidative polyline { stroke-dasharray: 3 8; }
.visual-qualifier { display: block; margin-top: 20px; color: #8f8f8f; font-size: 9px; letter-spacing: .08em; text-transform: uppercase; }
.article-evidence-note { margin: 0 0 52px; padding: 26px 28px; border-left: 5px solid var(--article-orange); background: #dedbd3; }
.article-evidence-note span { display: block; margin-bottom: 10px; color: #6a350f; font-size: 10px; font-weight: 700; letter-spacing: .14em; }
.article-evidence-note p { margin: 0; color: #292929; font-size: 15px; line-height: 1.65; }
.article-takeaways { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(45px, 9vw, 140px); padding: clamp(70px, 10vw, 130px) clamp(20px, 10vw, 155px); background: #737477; color: #fff; }
.article-takeaways h2 { margin: 0; font: 600 clamp(42px, 6vw, 82px)/.9 "Space Grotesk", Arial, sans-serif; letter-spacing: -.065em; }
.article-takeaways h2 em { color: var(--article-orange); font-style: normal; }
.article-takeaways ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.25); }
.article-takeaways li { display: grid; grid-template-columns: 34px 1fr; gap: 12px; padding: 20px 0; border-bottom: 1px solid rgba(255,255,255,.25); font-size: 16px; line-height: 1.45; }
.article-takeaways li::before { content: "+"; color: var(--article-orange); font-weight: 700; }
.article-sources { padding: clamp(60px, 8vw, 100px) clamp(20px, 10vw, 155px); background: #242424; color: #fff; }
.article-sources h2 { margin: 0 0 12px; font: 600 clamp(30px, 3vw, 44px)/1 "Space Grotesk", Arial, sans-serif; letter-spacing: -.04em; }
.article-sources > p { max-width: 680px; color: #aaa; font-size: 13px; }
.article-sources ul { display: grid; gap: 0; max-width: 900px; margin: 34px 0 0; padding: 0; list-style: none; border-top: 1px solid #444; }
.article-sources li { border-bottom: 1px solid #444; }
.article-sources a { display: block; padding: 17px 0; color: #fff; font-size: 13px; }
.article-sources a:hover { color: var(--article-orange); }
.article-more { display: grid; grid-template-columns: 1fr 1fr; }
.article-more a { display: flex; min-height: 130px; align-items: center; justify-content: center; padding: 24px; background: var(--article-orange); color: #fff; font-size: 11px; font-weight: 700; letter-spacing: .1em; text-align: center; text-transform: uppercase; }
.article-more a:first-child { background: #111; }
.article-more a:hover { filter: brightness(1.1); }
.article-error { padding: 50px; background: #fff; }

@media (max-width: 820px) {
  .article-layout,.article-takeaways { grid-template-columns: 1fr; }
  .article-aside { position: static; }
}
@media (max-width: 540px) {
  .article-hero { padding-top: 70px; }
  .article-hero h1 { font-size: clamp(42px, 15vw, 66px); }
  .article-meta { display: grid; }
  .article-more { grid-template-columns: 1fr; }
  .article-more a { min-height: 96px; }
  .article-visual { padding: 24px 18px; }
  .visual-bar-row { grid-template-columns: 1fr; gap: 8px; }
  .visual-steps,.visual-comparison { grid-template-columns: 1fr; }
  .visual-steps > div,.visual-comparison > div { min-height: 126px; }
  .visual-pyramid > div { width: 100% !important; align-items: flex-start; flex-direction: column; }
  .visual-pyramid span { text-align: left; }
  .visual-line-chart { min-height: 190px; }
  .energy-chart-viewport { margin-right: -18px; padding-bottom: 8px; }
  .energy-systems-chart { min-width: 520px; }
}