:root { color-scheme: light; font-family: Georgia, "Times New Roman", serif; color: #202823; background: #fff; }
* { box-sizing: border-box; letter-spacing: 0; }
body { margin: 0; }
[hidden] { display: none !important; }
a { color: #095e68; text-underline-offset: 3px; }
a:hover { color: #8b1014; }
a:focus-visible, input:focus-visible { outline: 3px solid #096e80; outline-offset: 4px; }
.site-header, main, footer { max-width: 1120px; margin: 0 auto; padding-left: 28px; padding-right: 28px; }
.site-header { padding-top: 24px; padding-bottom: 20px; border-bottom: 1px solid #d9dfdc; }
.site-header img { display: block; width: 280px; max-width: 100%; height: auto; }
.site-header p { margin: 3px 0 0; font-size: 14px; font-style: italic; }
.article-heading { padding: 28px 0 22px; }
.eyebrow { font-family: Arial, sans-serif; text-transform: uppercase; font-size: 11px; font-weight: 700; color: #4a6258; margin: 0 0 12px; }
.eyebrow span { margin-left: 12px; border-left: 1px solid #bbc9c1; padding-left: 12px; color: #8b1014; }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 10px; overflow-wrap: break-word; }
h2 { font-size: 24px; line-height: 1.25; margin: 0 0 12px; }
h3 { font-size: 18px; margin: 0 0 12px; }
p { line-height: 1.6; margin: 0 0 16px; }
.intro { color: #546058; font-size: 18px; margin-bottom: 18px; }
.equation { font-size: 25px; margin-bottom: 8px; }
.conditions { color: #546058; font-size: 14px; margin-bottom: 0; }
.viewer { border: 0; border-top: 1px solid #bbc9c1; margin: 0; padding: 18px 0 0; min-width: 0; }
.viewer legend { font-family: Arial, sans-serif; font-size: 12px; color: #46594e; padding: 0 10px 0 0; }
.viewer > input { accent-color: #0f716d; margin: 0 5px 0 0; }
.viewer > label { display: inline-block; font-family: Arial, sans-serif; font-size: 14px; padding: 6px 0 10px; margin-right: 24px; border-bottom: 3px solid transparent; cursor: pointer; }
.viewer > input:checked + label { color: #075851; border-bottom-color: #0f716d; font-weight: 700; }
.panels { margin-top: 20px; }
.preset { display: none; grid-template-columns: minmax(0, 1fr) 220px; gap: 30px; align-items: start; }
#underdamped:checked ~ .panels #underdamped-panel,
#critical:checked ~ .panels #critical-panel,
#overdamped:checked ~ .panels #overdamped-panel { display: grid; }
.preset img { display: block; width: 100%; height: auto; aspect-ratio: 1000 / 620; }
.preset aside { border-left: 2px solid #cbd9d1; padding-left: 20px; min-width: 0; }
.preset aside p { font-size: 15px; min-height: 120px; }
dl { font-family: Arial, sans-serif; margin: 0 0 24px; }
dt { font-size: 12px; color: #546058; margin-top: 18px; }
dd { font-size: 21px; margin: 5px 0 0; font-variant-numeric: tabular-nums; }
.small { font-size: 13px; color: #546058; }
.comparison { margin-top: 36px; padding: 28px 0; border-top: 1px solid #d9dfdc; }
.comparison p { max-width: 850px; }
.comparison img { display: block; width: 100%; max-width: 920px; height: auto; margin: 12px auto 0; }
.reproduce { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; border-top: 1px solid #d9dfdc; padding: 30px 0; }
.download { display: inline-block; font-family: Arial, sans-serif; background: #12655a; color: white; padding: 13px 16px; text-decoration: none; margin: 4px 0 18px; border-radius: 3px; }
.download:hover { color: white; background: #104e47; }
.download span { font-size: 12px; margin-left: 12px; opacity: .85; }
footer { border-top: 1px solid #d9dfdc; padding-top: 20px; padding-bottom: 24px; font-size: 13px; }
.explorer { padding: 20px 0 24px; border-top: 1px solid #bbc9c1; }
.explorer-controls { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 32px; align-items: start; }
.explorer-controls label { font-size: 17px; }
.explorer input[type="range"] { width: 100%; margin: 14px 0 5px; accent-color: #12655a; cursor: pointer; }
.range-ends { display: flex; justify-content: space-between; font: 12px Arial, sans-serif; color: #546058; }
.regime h2 { font-size: 20px; margin: 0 0 8px; }
.regime p { margin: 0; font-size: 15px; }
.behavior { margin: 14px 0; min-height: 26px; color: #546058; font-size: 14px; }
.quantity { border: 0; padding: 0; margin: 16px 0 10px; display: flex; gap: 22px; font: 14px Arial, sans-serif; }
.quantity legend { float: left; margin-right: 16px; color: #546058; }
.quantity input { accent-color: #12655a; }
.chart-label { font: 12px Arial, sans-serif; margin: 0 0 6px; color: #546058; }
#osc-chart { display: block; width: 100%; height: 245px; }
#osc-scene { display: block; width: 100%; height: 90px; }
.time-controls { display: grid; grid-template-columns: 72px 72px auto minmax(60px, 1fr); align-items: center; gap: 12px; margin-top: 10px; font: 14px Arial, sans-serif; }
.time-controls input[type="range"] { margin: 0; }
.time-controls button { min-height: 36px; border: 1px solid #abbdb3; background: #fff; border-radius: 3px; font: 14px Arial, sans-serif; cursor: pointer; }
.time-controls #osc-play { background: #12655a; color: white; border-color: #12655a; }
.time-controls button:disabled { opacity: .5; cursor: default; }
.readings { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-bottom: 18px; }
.readings dd { font-size: 18px; white-space: nowrap; }
.explorer-foot { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; font-size: 14px; }
.explorer-foot p { margin: 0; }
#reference-cases { border-top: 1px solid #d9dfdc; padding-top: 18px; }
#reference-cases summary { cursor: pointer; margin-bottom: 18px; font-size: 18px; }
@media (max-width: 650px) {
  .site-header, main, footer { padding-left: 18px; padding-right: 18px; }
  .site-header { padding-top: 18px; padding-bottom: 15px; }
  .site-header img { width: 245px; }
  h1 { font-size: 28px; }
  .intro { font-size: 16px; }
  .article-heading { padding-top: 24px; }
  .viewer > label { font-size: 12px; margin-right: 10px; }
  .preset { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  .preset img { aspect-ratio: 600 / 620; }
  .preset aside { padding-left: 16px; }
  .preset aside p { min-height: 0; }
  dl { display: flex; gap: 32px; flex-wrap: wrap; margin-bottom: 14px; }
  dd { font-size: 18px; }
  dt { margin-top: 4px; }
  .comparison { margin-top: 28px; }
  .reproduce { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .explorer-controls { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  .regime { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
  .regime h2 { font-size: 17px; }
  .regime p { font-size: 13px; }
  .behavior { min-height: 46px; margin: 10px 0; }
  .quantity { gap: 8px; font-size: 12px; }
  .quantity legend { display: none; }
  #osc-chart { height: 225px; }
  .readings { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
  .readings dd { font-size: 17px; }
  .time-controls { grid-template-columns: 58px 58px auto minmax(40px, 1fr); gap: 8px; }
}
@media print {
  .explorer { display: none; }
  .preset { display: grid !important; break-inside: avoid; margin-bottom: 24px; }
  .viewer > input, .viewer > label, .download { display: none; }
}