:root {
  color-scheme: dark;
  --bg: #0b0c0f;
  --panel: #14161c;
  --line: #262a33;
  --text: #d7dbe3;
  --dim: #8b93a3;
  --accent: #ff8a3d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0 1.25rem 3rem;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  line-height: 1.75;
}

header,
main,
footer {
  max-width: 60rem;
  margin: 0 auto;
}

header {
  padding: 2.5rem 0 1.5rem;
}

h1 {
  margin: 0;
  font-size: 2.25rem;
  letter-spacing: 0.02em;
}

.lead {
  margin: 0.5rem 0 0;
  color: var(--dim);
  max-width: 48rem;
}

.lead strong {
  color: var(--text);
}

#scenes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

#scenes button {
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--dim);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

#scenes button:hover {
  color: var(--text);
  border-color: #3a4150;
}

#scenes button.on {
  background: var(--accent);
  border-color: var(--accent);
  color: #16110c;
  font-weight: 600;
}

#viewport {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  overflow: hidden;
  background: #000;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  image-rendering: pixelated;
}

#overlay {
  position: absolute;
  top: 0.6rem;
  right: 0.75rem;
  display: flex;
  gap: 0.75rem;
  align-items: baseline;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 0.8rem;
  color: var(--dim);
  text-shadow: 0 1px 3px #000;
  pointer-events: none;
}

#hash {
  color: #7fd8ff;
}

#events {
  color: var(--accent);
}

#controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--dim);
}

#controls button {
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

#controls label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

#about {
  margin-top: 3rem;
}

h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.5rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--line);
}

dt {
  margin-top: 1rem;
  font-weight: 600;
  color: var(--accent);
}

dd {
  margin: 0.25rem 0 0;
  color: var(--dim);
}

dd strong {
  color: var(--text);
}

#about p {
  color: var(--dim);
}

#about p strong {
  color: var(--text);
}

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 0.85rem;
}

a {
  color: #7fd8ff;
}