/* =========================================================
   Testing Practice — the demo page

   Near-monochrome on white, with one green for a pass and one
   red for a refusal. No texture, no depth, nothing warm.
   ========================================================= */

:root {
  --paper: #ffffff;
  --sunk: #f6f7f8;
  --ink: #0f1013;
  --ink-2: #43464d;
  --muted: #7a7e87;
  --rule: #e4e6ea;

  --pass: #146c43;
  --pass-bg: #edf7f1;
  --fail: #a52218;
  --fail-bg: #fdf0ef;

  --ui: "Sora", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--ui);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.page {
  max-width: 780px;
  margin-inline: auto;
  padding: clamp(2rem, 6vw, 4rem) clamp(1rem, 4vw, 2rem) 4rem;
}

/* ---------------------------------------------------------
   masthead
   --------------------------------------------------------- */

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0;
}

.masthead h1 {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin: 0.5rem 0 0;
  text-wrap: balance;
}

.lede {
  max-width: 54ch;
  color: var(--ink-2);
  margin: 0.7rem 0 0;
}

/* --- the suite's verdict --- */

.suite {
  margin-top: 1.75rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--sunk);
}

.verdict {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  margin: 0;
}

.verdict.is-pass { color: var(--pass); }
.verdict.is-fail { color: var(--fail); }

.tick {
  font-size: 1.1rem;
  line-height: 1;
}

.files {
  list-style: none;
  margin: 0.7rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 0.1rem 1.25rem;
}

.files li {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.8rem;
  padding: 0.15rem 0;
  border-bottom: 1px solid var(--rule);
}

.files code {
  font-family: var(--mono);
  color: var(--ink-2);
}

.files .n {
  font-family: var(--mono);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.when {
  font-size: 0.76rem;
  color: var(--muted);
  margin: 0.7rem 0 0;
}

/* ---------------------------------------------------------
   the demos
   --------------------------------------------------------- */

.demo {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--rule);
}

.demo:first-of-type {
  padding-top: 2.25rem;
}

.demo-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem;
}

.demo h2 {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
}

.sig {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--muted);
  background: var(--sunk);
  border-radius: 3px;
  padding: 0.1rem 0.4rem;
}

.blurb {
  color: var(--ink-2);
  font-size: 0.88rem;
  margin: 0.25rem 0 0;
  max-width: 58ch;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.9rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.field.wide {
  flex: 1 1 18rem;
}

.field > span {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--muted);
}

.field input,
.field select {
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.4rem 0.55rem;
  background: var(--paper);
  font-family: var(--mono);
  font-size: 0.86rem;
  min-width: 0;
}

.field input[type="number"] {
  width: 6rem;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--ink);
}

.result {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin-top: 0.8rem;
}

.arrow {
  font-family: var(--mono);
  color: var(--muted);
  line-height: 1.6;
  flex: none;
}

.output {
  flex: 1;
  min-width: 0;
  margin: 0;
  padding: 0.5rem 0.7rem;
  border-radius: 3px;
  background: var(--pass-bg);
  border: 1px solid #cfe6da;
  color: var(--pass);
  font-family: var(--mono);
  font-size: 0.86rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* a refusal is a result, not a crash — it just looks different */
.output.is-throw {
  background: var(--fail-bg);
  border-color: #f0cfcc;
  color: var(--fail);
}

.colophon {
  margin-top: 2rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.colophon code {
  font-family: var(--mono);
  background: var(--sunk);
  border-radius: 3px;
  padding: 0.05rem 0.3rem;
}

.colophon a {
  color: var(--ink);
  text-underline-offset: 2px;
}