:root {
  --vellum: #e8eced;
  --sheet: #f6f8f8;
  --graphite: #25292e;
  --graphite-soft: #5a636b;
  --guide: #9fb0b8;
  --cyan: #0b7389;
  --cyan-wash: rgba(11, 115, 137, .13);
  --yellow: #f2b705;
  --din: "Bahnschrift", "DIN Alternate", "DIN Condensed", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --vellum: #172026;
    --sheet: #1d282f;
    --graphite: #e3e8ea;
    --graphite-soft: #a3afb6;
    --guide: #46606b;
    --cyan: #5cc6dc;
    --cyan-wash: rgba(92, 198, 220, .14);
    --yellow: #f5c842;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--vellum);
  color: var(--graphite);
  font: 17px/1.8 var(--sans);
  overflow-x: hidden;
}
a { color: inherit; }
:focus-visible { outline: 3px solid var(--yellow); outline-offset: 3px; }
.head, main, .footer { width: min(1120px, 100% - 32px); margin-inline: auto; }

.head { padding: 64px 0 28px; display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); gap: 16px 48px; align-items: end; }
.site-name {
  margin: 0;
  font: 700 clamp(30px, 4.6vw, 58px)/1.2 var(--sans);
  letter-spacing: -.01em;
  transform: skewX(-8deg);
  transform-origin: left bottom;
}
.lede { margin: 0; color: var(--graphite-soft); font-size: 16px; border-left: 3px solid var(--yellow); padding-left: 16px; }

.studio { display: grid; grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr); gap: 24px; align-items: start; padding: 12px 0 56px; }
.sheet {
  background: var(--sheet);
  padding: 18px 18px 12px;
  border-radius: 2px;
  box-shadow: 0 1px 0 var(--guide), 0 0 0 1px var(--guide);
  position: relative;
}
.drawing { display: block; width: 100%; height: auto; }
.guides line { stroke: var(--guide); stroke-width: 1; }
.ground { stroke-width: 1.5 !important; }
.axle, .beltline { stroke-dasharray: 3 5; }
.dim { stroke: var(--cyan) !important; stroke-width: 1.5 !important; }
.dim-text { fill: var(--cyan); font: 600 12px var(--din); text-anchor: middle; }
.body { fill: var(--cyan-wash); stroke: var(--graphite); stroke-width: 2.4; stroke-linejoin: round; stroke-linecap: round; }
.body.ghost { fill: none; stroke: var(--cyan); stroke-width: 1; opacity: .7; }
.glass { fill: var(--cyan); fill-opacity: .28; stroke: var(--graphite); stroke-width: 1.4; stroke-linejoin: round; }
.shadow { stroke: var(--graphite); stroke-width: 7; stroke-linecap: round; opacity: .14; fill: none; }
.wheel circle { fill: var(--sheet); stroke: var(--graphite); stroke-width: 2.4; }
.wheel .hub { fill: var(--yellow); stroke-width: 1.4; }
.caption { margin: 6px 4px 4px; font-size: 15px; color: var(--graphite-soft); min-height: 1.8em; }

.panel h2 { font: 700 24px/1.3 var(--sans); margin: 0; }
.panel-note { margin: 6px 0 16px; font-size: 15px; color: var(--graphite-soft); }
.presets { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.presets button {
  font: 600 14px/1 var(--sans);
  color: var(--graphite);
  background: transparent;
  border: 1.5px solid var(--graphite);
  padding: 8px 12px;
  border-radius: 2px;
  cursor: pointer;
}
.presets button:hover { background: var(--yellow); border-color: var(--yellow); color: #25292e; }
.slider { display: grid; grid-template-columns: 5em 1fr; align-items: center; gap: 12px; margin: 10px 0; font-size: 15px; }
.slider input { width: 100%; accent-color: var(--cyan); }

.notes { padding: 24px 0 56px; border-top: 1.5px solid var(--graphite); }
.notes > h2 { font: 700 24px/1.3 var(--sans); margin: 18px 0 20px; }
.note-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr)); gap: 32px 28px; }
.note svg { width: 100%; max-width: 200px; height: 70px; fill: none; stroke: var(--graphite); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.note svg .accent { stroke: var(--cyan); stroke-width: 2.4; }
.note h3 { font: 700 18px/1.4 var(--sans); margin: 10px 0 6px; }
.note p { margin: 0; font-size: 15px; color: var(--graphite-soft); }

.footer { padding: 24px 0 40px; border-top: 1px solid var(--guide); color: var(--graphite-soft); font-size: 14px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 24px; }
.footer p { margin: 0; }

@media (max-width: 820px) {
  .head, .studio { grid-template-columns: 1fr; }
  .head { padding-top: 44px; }
  .site-name { transform: none; }
  body { font-size: 16px; }
}