:root {
  --bg: #e7e5e4;
  --ink: #082f49;
  --accent: #0369a1;
  --muted: #57534e;
  --line: #d6d3d1;
  --card: #f5f4f1;
}
* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: ui-serif, Georgia, "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.6;
}
a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
a:hover {
  border-bottom-color: var(--accent);
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 3rem;
}
header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.75rem;
}
.brand {
  color: var(--ink);
  font-weight: 600;
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
}
.brand img {
  height: 32px;
  width: auto;
  display: block;
}
.brand:hover {
  border-bottom-color: transparent;
}
nav.site a {
  margin-left: 1.25rem;
  font-size: 0.95rem;
  color: var(--muted);
}
nav.site a:hover,
nav.site a.active {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

h1 {
  font-size: 1.6rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
}
.lede {
  color: var(--muted);
  margin: 0 0 1.75rem;
}

.picker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}
.picker button {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  font-size: 0.92rem;
  transition: 120ms ease;
}
.picker button:hover {
  color: var(--ink);
  border-color: var(--muted);
}
.picker button.active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
}
.picker button .glyph {
  font-family: "Times New Roman", serif;
  font-style: italic;
  margin-right: 0.35rem;
  font-size: 1.05em;
}

.layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 760px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.stage {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 6px;
  aspect-ratio: 1 / 1;
  width: 100%;
  position: relative;
  overflow: hidden;
}
canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.info h2 {
  font-size: 1.2rem;
  margin: 0 0 0.25rem;
  font-weight: 600;
}
.info .value {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--accent);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}
.info p {
  margin: 0 0 0.9rem;
  font-size: 0.97rem;
}
.info .approx {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.6rem 0.8rem;
  font-family: ui-monospace, monospace;
  font-size: 0.92rem;
  margin-bottom: 1rem;
}
.info .approx .label {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.info .approx .num {
  color: var(--ink);
  font-size: 1.1rem;
  font-weight: 600;
}

.controls {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}
.controls label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}
.controls input[type="range"] {
  width: 100%;
  accent-color: var(--ink);
}
.controls .row {
  margin-bottom: 0.85rem;
}
.controls .val {
  font-family: ui-monospace, monospace;
  color: var(--ink);
  font-size: 0.85rem;
}
.controls .hint {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 0.25rem;
}
.controls button.tiny {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  font: inherit;
  font-size: 0.8rem;
  padding: 0.2rem 0.55rem;
  border-radius: 3px;
  cursor: pointer;
  margin-right: 0.3rem;
}
.controls button.tiny:hover {
  color: var(--ink);
  border-color: var(--muted);
}

footer.site {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--muted);
}

.stage {
  aspect-ratio: 1;
  border-radius: 8px;
}
.stage-caption {
  padding: 0.75rem 1rem;
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-top: 0;
  border-radius: 0 0 6px 6px;
}
.experiment-title {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font:
    0.7rem ui-monospace,
    monospace;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.formula {
  font-size: 1.2rem;
  margin: 1rem 0;
}
.try {
  padding-left: 0.85rem;
  border-left: 3px solid #b56342;
  color: var(--muted);
}
.readings {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
.readings .num {
  font-size: 1rem !important;
  overflow-wrap: anywhere;
}
.controls {
  margin-top: 1rem;
  padding-top: 1rem;
}
.controls button.tiny {
  min-height: 36px;
  padding: 0.25rem 0.65rem;
}
.action-bar {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}
.action-bar button {
  font: inherit;
  font-size: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--card);
  padding: 0.4rem 0.8rem;
  cursor: pointer;
  color: var(--ink);
}
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
@media (max-width: 760px) {
  .wrap {
    padding-top: 1rem;
  }
  .stage {
    aspect-ratio: 1.2;
  }
  .layout {
    gap: 1rem;
  }
  .picker button {
    padding: 0.35rem 0.65rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}

.stage-caption {
  margin-top: 1rem;
  border: 0;
  border-top: 1px solid var(--line);
  padding: 0.8rem 0 0;
}
.wrap {
  padding-top: 1.5rem;
}
.controls .row {
  margin-bottom: 0.5rem;
}
.controls {
  margin-top: 0.8rem;
  padding-top: 0;
  border: 0;
}