:root {
  --hairline-plate: #000000;
  --hairline-hi: #f5f5f7;
  --hairline-edge: #a1a1a6;
  --hairline-mid: #6e6e73;
  --hairline-lo: #424245;
  --hairline-stroke: 0.9;
  --page-ink: #f5f5f7;
  --page-muted: #a1a1a6;
  color-scheme: dark;
  background: var(--hairline-plate);
  color: var(--page-ink);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: var(--hairline-plate);
  color: var(--page-ink);
}

body {
  padding: 4.5rem 1.5rem 6rem;
}

.top,
section {
  width: 100%;
  max-width: 720px;
  margin-right: auto;
  margin-left: auto;
}

.top {
  margin-bottom: 4rem;
}

h1 {
  margin: 0 0 0.65rem;
  font-size: 1.75rem;
  font-weight: 560;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--page-ink);
}

.lede {
  margin: 0 0 2rem;
  color: var(--page-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.control {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 28rem;
}

.control label,
.control output,
h2 {
  color: var(--page-muted);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.control label {
  flex: 0 0 auto;
}

.control output {
  flex: 0 0 2.5rem;
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  flex: 1 1 auto;
  width: 100%;
  margin: 0;
  accent-color: var(--page-ink);
}

main {
  display: flex;
  flex-direction: column;
  gap: 4.5rem;
}

h2 {
  margin: 0 0 0.85rem;
}

.figure {
  width: 100%;
  aspect-ratio: 5 / 4;
  position: relative;
}

.settings-open {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 40;
  margin: 0;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--page-muted);
  border-radius: 0.4rem;
  background: var(--hairline-plate);
  color: var(--page-ink);
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
}

.settings-open:focus-visible {
  outline: 1.5px solid var(--page-ink);
  outline-offset: 2px;
}

.settings-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--page-ink) 28%, transparent);
}

.settings-dialog {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 4.5rem 1rem 1rem;
  pointer-events: none;
}

.settings-dialog[hidden],
.settings-backdrop[hidden] {
  display: none;
}

.settings-panel {
  pointer-events: auto;
  width: min(100%, 22rem);
  padding: 1.1rem 1.15rem 1rem;
  border: 1px solid var(--page-muted);
  border-radius: 0.55rem;
  background: var(--hairline-plate);
  color: var(--page-ink);
  box-shadow: 0 12px 40px color-mix(in srgb, var(--page-ink) 18%, transparent);
}

.settings-panel h2 {
  margin: 0 0 1rem;
  color: var(--page-ink);
  font-size: 1rem;
  font-weight: 560;
  letter-spacing: -0.02em;
}

.theme-group {
  margin: 0 0 1rem;
  padding: 0;
  border: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.theme-group legend {
  margin: 0 0 0.55rem;
  padding: 0;
  color: var(--page-muted);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.theme-group label {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--page-ink);
  font-size: 0.9rem;
  cursor: pointer;
}

.theme-group input {
  accent-color: var(--page-ink);
}

.settings-close {
  margin: 0;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--page-muted);
  border-radius: 0.4rem;
  background: var(--hairline-plate);
  color: var(--page-ink);
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
}

.settings-close:focus-visible {
  outline: 1.5px solid var(--page-ink);
  outline-offset: 2px;
}