/* Rularoo, on the web.
   One stylesheet, no build step. The palette is the app's: graphite ground,
   cool paper text, and a single violet accent that only ever marks the thing
   you are meant to do next.

   Violet rather than anything warmer is a legibility decision as much as a
   taste one. FITS and FAILS are the only other colours on the page and they
   have to be unmistakable, so the accent is kept off the green-to-red arc
   entirely: nothing the interface highlights can be misread as a verdict. */

:root {
  --ink: #ece9f1;
  --ink-dim: #9a97a8;
  --ground: #121016;
  --raised: #1c1922;
  --line: #2e2a38;
  --accent: #a78bfa;
  --fits: #3ecf8e;
  --fails: #ef5f77;
  --radius: 10px;
  --measure: 34rem;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 16px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.015em; }
h1 { font-size: clamp(1.8rem, 5vw, 2.6rem); margin: 0 0 0.6rem; }
h2 { font-size: 1.3rem; margin: 2.2rem 0 0.5rem; }
h3 { font-size: 1.05rem; margin: 0 0 0.4rem; }

header.site, footer.site {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  max-width: 64rem;
  margin: 0 auto;
  padding: 1.2rem 1.5rem;
}
header.site { border-bottom: 1px solid var(--line); }
footer.site {
  border-top: 1px solid var(--line);
  margin-top: 4rem;
  color: var(--ink-dim);
  font-size: 0.9rem;
}
header.site nav, footer.site nav { display: flex; gap: 1.1rem; }
header.site nav a, footer.site nav a { color: var(--ink-dim); text-decoration: none; }
header.site nav a:hover, footer.site nav a:hover { color: var(--ink); }
.wordmark {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}
.lang {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.1rem 0.55rem;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
}

main { max-width: 64rem; margin: 0 auto; padding: 0 1.5rem; }

.eyebrow {
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  margin: 2.5rem 0 0.6rem;
}
.lede { font-size: 1.08rem; color: var(--ink-dim); max-width: var(--measure); }
.hero h1 { max-width: 20ch; }
.prose { max-width: var(--measure); }
.prose p { color: var(--ink-dim); }
.note { font-size: 0.92rem; color: var(--ink-dim); }
.label {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 0.4rem;
}
.caption { color: var(--ink-dim); max-width: var(--measure); font-size: 0.95rem; }

.actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin: 1.6rem 0; }

.button {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--raised);
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  padding: 0.6rem 1.1rem;
  cursor: pointer;
  text-decoration: none;
}
.button:hover { border-color: var(--ink-dim); }
.button.primary { background: var(--accent); border-color: var(--accent); color: #16101f; }
.button.primary:hover { filter: brightness(1.08); }
.button.quiet { background: transparent; color: var(--ink-dim); }
.button[disabled] { opacity: 0.45; cursor: not-allowed; }

.sequence {
  display: flex;
  gap: 0.6rem;
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  flex-wrap: wrap;
}
.sequence li {
  font: 700 1.5rem/1 var(--mono);
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  min-width: 3.2rem;
  text-align: center;
}
.sequence.given li { border-color: var(--accent); }

.demo { margin: 3rem 0; }

.cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.card {
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
}
.card p { color: var(--ink-dim); font-size: 0.95rem; }

/* The player */
.play { max-width: 44rem; margin: 2rem auto 0; }
.play-head { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: flex-end; }
.play-head .date { color: var(--ink-dim); font-weight: 400; font-size: 0.9em; }
.scoreline { display: flex; gap: 1.4rem; margin: 0; }
.scoreline div { text-align: right; }
.scoreline dt { font-size: 0.72rem; letter-spacing: 0.07em; text-transform: uppercase; color: var(--ink-dim); }
.scoreline dd { margin: 0; font: 700 1.3rem/1.2 var(--mono); }

.probe { margin: 1.6rem 0 0.5rem; }
.probe .row { display: flex; gap: 0.6rem; }
.probe input {
  flex: 1;
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font: 1.1rem var(--mono);
  padding: 0.65rem 0.9rem;
  min-width: 0;
}
.probe input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.probe label { display: block; font-size: 0.9rem; color: var(--ink-dim); margin-bottom: 0.35rem; }
.help { font-size: 0.82rem; color: var(--ink-dim); margin: 0.4rem 0 0; }

.probes { list-style: none; padding: 0; margin: 1rem 0; display: flex; flex-direction: column; gap: 0.4rem; }
.probes li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  background: var(--raised);
  border: 1px solid var(--line);
  border-left-width: 3px;
  border-radius: var(--radius);
  padding: 0.5rem 0.9rem;
  font-family: var(--mono);
}
.probes li.fits { border-left-color: var(--fits); }
.probes li.fails { border-left-color: var(--fails); }
.probes .verdict { font-size: 0.78rem; letter-spacing: 0.08em; font-weight: 700; }
.probes li.fits .verdict { color: var(--fits); }
.probes li.fails .verdict { color: var(--fails); }

.builder { margin-top: 2rem; border-top: 1px solid var(--line); padding-top: 1.4rem; }
.slots { display: grid; gap: 0.8rem; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr)); }
.slots label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.82rem; color: var(--ink-dim); }
.slots select {
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font: inherit;
  padding: 0.55rem 0.6rem;
}
.reading { margin: 1.1rem 0 0; }
.reading output { font-weight: 600; }
.budget { font-size: 0.85rem; color: var(--ink-dim); }

.outcome:not(:empty) {
  margin: 1.4rem 0;
  padding: 1rem 1.2rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  background: var(--raised);
}
.outcome.win { border-left-color: var(--fits); }
.outcome.lose { border-left-color: var(--fails); }
.outcome p { margin: 0.3rem 0; }
.outcome .rule { font-weight: 600; font-size: 1.05rem; }

.play-foot { margin-top: 2.5rem; border-top: 1px solid var(--line); padding-top: 1.2rem; }
.play-foot .note { margin: 0.6rem 0 0; }

@media (max-width: 30rem) {
  .play-head { align-items: flex-start; }
  .scoreline { gap: 1rem; }
  .sequence li { font-size: 1.25rem; padding: 0.6rem 0.7rem; min-width: 2.8rem; }
}

@media (prefers-reduced-motion: no-preference) {
  .probes li { animation: slide-in 160ms ease-out; }
  @keyframes slide-in { from { opacity: 0; transform: translateY(-3px); } }
}