/* Effect track — paper + three type-channels. Print-friendly. */
:root {
  --paper: #f6f0e4;
  --ink: #1c1612;
  --muted: #6d6458;
  --rule: #d8cbb8;
  --card: #fffaf1;
  --a: #1d4ed8;
  --a-soft: #dbe4ff;
  --e: #be123c;
  --e-soft: #ffe1e7;
  --r: #0f766e;
  --r-soft: #d7f3ef;
  --run: #5b21b6;
  --run-soft: #eee4ff;
  --ok: #166534;
  --ok-soft: #dcfce7;
  --bad: #9f1239;
  --bad-soft: #ffe4e6;
  --code-bg: #1c1612;
  --code-fg: #f4efe6;
  --shadow: 0 1px 0 rgba(28, 22, 18, 0.06), 0 12px 32px rgba(28, 22, 18, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #161310;
    --ink: #f3ece2;
    --muted: #a89c8c;
    --rule: #3a332b;
    --card: #1f1a16;
    --a-soft: #1a2744;
    --e-soft: #3a1822;
    --r-soft: #14302d;
    --run-soft: #2a1c44;
    --ok-soft: #16341f;
    --bad-soft: #3a1822;
    --code-bg: #0e0c0a;
    --code-fg: #f3ece2;
    --shadow: 0 1px 0 rgba(0, 0, 0, 0.4), 0 16px 40px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

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

body {
  font: 18px/1.55 "Iowan Old Style", Palatino, "Palatino Linotype", "Times New Roman", serif;
}

.page {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 5rem;
}

header.mast {
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1.25rem;
  margin-bottom: 2rem;
}

.kicker {
  font: 0.72rem/1.3 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.4rem;
}

h1 {
  font-size: 2.1rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 0.6rem;
}

.lede {
  font-size: 1.12rem;
  color: var(--muted);
  margin: 0;
}

h2 {
  font-size: 1.2rem;
  margin: 2.4rem 0 0.7rem;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1rem;
  margin: 1.6rem 0 0.5rem;
}

p { margin: 0.8rem 0; }

a { color: var(--run); }
a:hover { text-decoration-thickness: 2px; }

code, kbd {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.86em;
}

p code, li code, td code, figcaption code {
  background: var(--card);
  border: 1px solid var(--rule);
  padding: 0.05em 0.35em;
  border-radius: 4px;
}

pre {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 1rem 1.1rem;
  border-radius: 10px;
  overflow-x: auto;
  font: 0.82rem/1.5 "JetBrains Mono", ui-monospace, Menlo, monospace;
  box-shadow: var(--shadow);
}

pre code { background: none; border: 0; padding: 0; color: inherit; }

ul, ol { padding-left: 1.25rem; }

li { margin: 0.35rem 0; }

blockquote {
  margin: 1.1rem 0;
  padding: 0.15rem 0 0.15rem 1rem;
  border-left: 3px solid var(--run);
  color: var(--muted);
}

aside.note {
  font-size: 0.92rem;
  color: var(--muted);
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  margin: 1.2rem 0;
}

aside.note strong { color: var(--ink); }

.channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
  margin: 1.1rem 0 1.4rem;
}

@media (min-width: 640px) {
  .channels { grid-template-columns: repeat(3, 1fr); }
}

.channel {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 0.85rem 0.95rem 1rem;
  box-shadow: var(--shadow);
}

.channel .slot {
  font: 0.72rem/1.2 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.channel.a { border-top: 4px solid var(--a); }
.channel.e { border-top: 4px solid var(--e); }
.channel.r { border-top: 4px solid var(--r); }
.channel.a .slot { color: var(--a); }
.channel.e .slot { color: var(--e); }
.channel.r .slot { color: var(--r); }

.channel p { margin: 0; font-size: 0.95rem; }

.type-line {
  font-family: "JetBrains Mono", ui-monospace, Menlo, monospace;
  font-size: 0.95rem;
  background: var(--card);
  border: 1px dashed var(--rule);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  margin: 1rem 0;
}

.type-line .a { color: var(--a); font-weight: 700; }
.type-line .e { color: var(--e); font-weight: 700; }
.type-line .r { color: var(--r); font-weight: 700; }

.lab, .quiz {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 1rem 1rem 1.15rem;
  margin: 1.3rem 0 1.6rem;
  box-shadow: var(--shadow);
}

.lab h2, .quiz h2 { margin-top: 0; }

.lab-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.4rem 0 0.9rem;
}

button, .lab-toolbar button {
  font: 0.85rem/1.2 ui-sans-serif, system-ui, sans-serif;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  cursor: pointer;
}

button[aria-pressed="true"],
.lab-toolbar button[aria-pressed="true"] {
  background: var(--run-soft);
  border-color: var(--run);
  color: var(--ink);
}

button.primary {
  background: var(--run);
  border-color: var(--run);
  color: #fff;
}

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

.world {
  font-family: "JetBrains Mono", ui-monospace, Menlo, monospace;
  font-size: 0.8rem;
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: 10px;
  min-height: 6.5rem;
  padding: 0.75rem 0.9rem;
  white-space: pre-wrap;
}

.world .empty { color: #8a8074; }

.world .hit { color: #fbbf24; }

.world .quiet { color: #8a8074; }

.quiz [data-question] {
  margin: 0 0 1.35rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}

.quiz [data-question]:last-of-type {
  border-bottom: 0;
  margin-bottom: 0.4rem;
  padding-bottom: 0;
}

.quiz .prompt {
  font-weight: 600;
  margin: 0 0 0.65rem;
}

.quiz .choices {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.quiz .choices button {
  text-align: left;
  border-radius: 8px;
  padding: 0.55rem 0.75rem;
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 0.92rem;
}

.quiz .choices button.ok {
  background: var(--ok-soft);
  border-color: var(--ok);
}

.quiz .choices button.bad {
  background: var(--bad-soft);
  border-color: var(--bad);
}

.quiz [data-explain] {
  font-size: 0.92rem;
  color: var(--muted);
  margin: 0.55rem 0 0;
}

.quiz [data-status] {
  font: 0.85rem/1.4 ui-sans-serif, system-ui, sans-serif;
  color: var(--muted);
}

footer.colophon {
  margin-top: 3rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.95rem;
}

.crumbs {
  font: 0.82rem/1.4 ui-sans-serif, system-ui, sans-serif;
  color: var(--muted);
  margin: 0 0 1.5rem;
}

.crumbs a { color: inherit; }

@media print {
  body { background: #fff; color: #000; }
  .lab, .quiz { break-inside: avoid; box-shadow: none; }
  a { color: inherit; text-decoration: underline; }
  button { display: none; }
}