:root {
  color-scheme: light dark;
  --ink: light-dark(#1a1c1e, #e8e6e3);
  --paper: light-dark(#fdfdfc, #131416);
  --edge: light-dark(#d8d6d2, #2c2e31);
  --accent: light-dark(#0a5c3a, #6fd0a2);
  --warn: light-dark(#7a3b00, #f0b26b);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.55 ui-sans-serif, system-ui, sans-serif;
}

main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 { margin: 0.25rem 0 0.5rem; font-size: 1.9rem; line-height: 1.2; }
h2 { font-size: 1.05rem; margin: 0 0 0.75rem; }

.lede { margin: 0 0 1.25rem; }

aside {
  border: 1px solid var(--warn);
  border-left-width: 4px;
  border-radius: 4px;
  padding: 0.6rem 0.9rem;
  color: var(--warn);
  font-size: 0.9rem;
}

.state { font-size: 0.9rem; color: var(--accent); }

section {
  border: 1px solid var(--edge);
  border-radius: 6px;
  padding: 1.1rem 1.25rem;
  margin: 1.25rem 0;
}

label { display: block; font-size: 0.85rem; margin-bottom: 0.4rem; }

.row { display: flex; gap: 0.6rem; }

input {
  flex: 1;
  min-width: 0;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--edge);
  border-radius: 4px;
  background: transparent;
  color: inherit;
  font: inherit;
}

button {
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--accent);
  border-radius: 4px;
  background: var(--accent);
  color: var(--paper);
  font: inherit;
  cursor: pointer;
}

button:disabled { opacity: 0.45; cursor: not-allowed; }

.fine { font-size: 0.8rem; opacity: 0.75; margin: 0.6rem 0 0; }

.result pre {
  overflow-x: auto;
  padding: 0.9rem;
  border: 1px solid var(--edge);
  border-radius: 4px;
  font: 0.82rem/1.5 ui-monospace, monospace;
  white-space: pre-wrap;
}