:root {
  color-scheme: dark;
  --bg: #171d1b;
  --panel: #202723;
  --muted: #95a098;
  --line: #354039;
  --accent: #d5e6a3;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: #eef0e5;
  font-family: "Segoe UI", Arial, sans-serif;
  font-size: 14px;
}
header {
  height: 102px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  padding: 0 42px;
  gap: 65px;
}
.brand {
  font-family: "Segoe UI", Arial, sans-serif;
  font-size: 35px;
  font-weight: 800;
  letter-spacing: -3px;
  color: var(--accent);
  text-decoration: none;
  position: relative;
}
.brand span {
  color: #eef0e5;
}
.brand small {
  display: block;
  font:
    9px "Segoe UI",
    Arial,
    sans-serif;
  letter-spacing: 2.7px;
  margin-top: 0;
  color: var(--muted);
}
.heading {
  font-size: 16px;
}
.heading span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-top: 7px;
}
.badge {
  margin-left: auto;
  font-size: 10px;
  letter-spacing: 1.6px;
  border: 1px solid var(--line);
  padding: 11px 15px;
  border-radius: 30px;
}
.badge i {
  display: inline-block;
  background: var(--accent);
  width: 6px;
  height: 6px;
  border-radius: 100%;
  margin-right: 8px;
}
main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  max-width: 1700px;
  margin: auto;
}
.stage {
  padding: 28px 28px 28px 36px;
  position: relative;
  min-width: 0;
}
.scene-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  gap: 10px;
}
.scene-head > span,
.eyebrow {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--muted);
}
button {
  background: transparent;
  color: #dfe6d8;
  border: 1px solid var(--line);
  padding: 9px 13px;
  border-radius: 6px;
  font:
    12px "Segoe UI",
    Arial,
    sans-serif;
  cursor: pointer;
}
button:hover {
  border-color: var(--accent);
  color: var(--accent);
}
button.active {
  background: var(--accent);
  color: #253022;
  border-color: var(--accent);
}
canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1.5;
  background: #242c27;
  border: 1px solid var(--line);
  border-radius: 10px;
  touch-action: none;
}
#loading {
  position: absolute;
  top: 36%;
  left: 30%;
  color: var(--accent);
  background: #171d1bdd;
  padding: 16px;
  border-radius: 8px;
}
.scene-note {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--muted);
  padding: 14px 2px;
  border-bottom: 1px solid var(--line);
}
.hint {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  margin: 25px 0 20px;
}
.tools {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}
.tools button {
  padding: 12px 15px;
}
aside {
  border-left: 1px solid var(--line);
  padding: 35px 25px;
  background: #1c231f;
}
h1 {
  font-family: "Segoe UI", Arial, sans-serif;
  font-size: 31px;
  letter-spacing: -1.5px;
  margin: 10px 0;
}
aside p {
  color: var(--muted);
  line-height: 1.7;
  font-size: 12px;
  margin-bottom: 28px;
}
.section {
  font-size: 10px;
  letter-spacing: 1.8px;
  border-top: 1px solid var(--line);
  padding-top: 21px;
  margin: 23px 0 20px;
  color: var(--accent);
}
label {
  display: block;
  font-size: 12px;
  margin: 18px 0;
}
output {
  float: right;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
input[type="range"] {
  display: block;
  width: 100%;
  accent-color: var(--accent);
  height: 4px;
  margin-top: 14px;
  cursor: pointer;
}
.help {
  color: var(--muted);
  font-size: 10px;
  display: block;
  margin-top: -3px;
}
select {
  width: 100%;
  padding: 10px;
  background: #242d27;
  color: #e4e9dd;
  border: 1px solid var(--line);
  border-radius: 5px;
  font:
    12px "Segoe UI",
    Arial,
    sans-serif;
  margin-top: 9px;
}
.demo {
  width: 100%;
  text-align: left;
  margin-top: 8px;
  color: var(--accent);
}
.foot {
  color: var(--muted);
  font-size: 10px;
  line-height: 1.9;
  margin-top: 26px;
}
.foot a {
  color: var(--accent);
}
#error {
  color: #ffd0b7;
  padding: 15px;
  white-space: pre-wrap;
}
@media (max-width: 900px) {
  header {
    padding: 0 20px;
    gap: 25px;
  }
  .heading {
    display: none;
  }
  main {
    grid-template-columns: 1fr;
  }
  aside {
    border-left: 0;
    border-top: 1px solid var(--line);
    display: block;
  }
  .stage {
    padding: 20px;
  }
  .scene-head > span {
    display: none;
  }
}