/* Shared styles for Luna printable teaching artifacts (/teach/<slug>/).
   Hand-written, no framework, no webfonts, no external assets.
   A4 and US Letter safe, black on white when printed. No emojis. */

:root {
  --fg: #1a1c22;
  --muted: #55606e;
  --border: #c8cdd6;
  --safety-border: #b34700;
  --safety-bg: #fff4e5;
  --rule: #8a919c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: #ffffff;
  color: var(--fg);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  font-size: 12pt;
  line-height: 1.5;
}

main {
  max-width: 46rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

h1 { font-size: 1.6rem; line-height: 1.25; margin: 0.2rem 0 0.5rem; }
h2 { font-size: 1.15rem; margin: 1.5rem 0 0.5rem; }

p { margin: 0.6rem 0; }

a { color: #1a5fb4; }
a:focus-visible { outline: 3px solid #1a5fb4; outline-offset: 2px; }

.doc-kicker {
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0;
}

.meta { color: var(--muted); font-size: 0.95rem; margin: 0.2rem 0; }

.answer-key-banner {
  border: 3px solid var(--safety-border);
  background: var(--safety-bg);
  color: #5c2600;
  font-weight: 700;
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.5rem 0.9rem;
  margin: 0 0 1rem;
}

/* Simulator URL box: the address is visible text so it survives printing. */
.sim-url {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 0.9rem;
  margin: 1rem 0;
}
.sim-url-label { margin: 0; font-weight: 600; }
.sim-url-value {
  margin: 0.2rem 0 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  word-break: break-all;
}

.name-fields { display: flex; gap: 2rem; margin: 1rem 0; }
.name-field { flex: 1; }
.name-field .blank {
  display: inline-block;
  min-width: 12rem;
  border-bottom: 1px solid var(--rule);
}

ul, ol { padding-left: 1.4rem; }
li { margin: 0.3rem 0; }

dl { margin: 0.6rem 0; }
dt { font-weight: 600; margin-top: 0.7rem; }
dd { margin: 0.2rem 0 0 1rem; }

.beat { margin-bottom: 0.8rem; }
.beat-head { font-weight: 600; margin: 0; }
.beat p { margin: 0.2rem 0; }

.choices { list-style: none; padding-left: 0.4rem; }

.follow-up { margin-top: 0.8rem; }

/* Ruled write-in lines that actually print. */
.write-lines { margin: 0.8rem 0 0.4rem; }
.rule-line {
  height: 2rem;
  border-bottom: 1px solid var(--rule);
}

.table-scroll { overflow-x: auto; margin: 1rem 0; }
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.95rem;
}
th, td {
  border: 1px solid var(--fg);
  padding: 0.5rem 0.6rem;
  text-align: left;
  vertical-align: top;
}
th { background: #f2f4f7; }
td.fill-cell { height: 2.4rem; }

.safety-block {
  border: 2px solid var(--safety-border);
  background: var(--safety-bg);
  padding: 0.8rem 1rem;
  border-radius: 6px;
  margin: 1.5rem 0;
}
.safety-block h2 { margin-top: 0; }
.safety-note { font-weight: 600; }

.grading-note {
  border-left: 4px solid var(--border);
  padding-left: 0.8rem;
  color: var(--muted);
}

.answer { margin-bottom: 1.2rem; }

@page {
  margin: 18mm 16mm;
}

/* Way back into the site for anyone who reached a printable on its own. On
   screen only: the printed sheet already carries its URL in the footer. */
.doc-nav {
  max-width: 46rem;
  margin: 0 auto;
  padding: 1rem 1.25rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.95rem;
}

@media print {
  .doc-nav { display: none; }
  body { font-size: 11pt; background: #fff; color: #000; }
  main { max-width: none; padding: 0; }
  a { color: #000; text-decoration: underline; }
  th { background: #fff; }

  /* Keep tables and student parts intact across page breaks where possible. */
  table, .part, .beat, .answer, .safety-block, .sim-url { break-inside: avoid; page-break-inside: avoid; }

  .rule-line { border-bottom: 1px solid #000; }
  .name-field .blank { border-bottom: 1px solid #000; }
  th, td { border-color: #000; }
  .answer-key-banner, .safety-block { background: #fff; color: #000; border-color: #000; }

  /* Footer with the page URL on every printed sheet. */
  main::after {
    content: 'Printed from ' attr(data-print-url);
    display: block;
    margin-top: 2rem;
    padding-top: 0.5rem;
    border-top: 1px solid #000;
    font-size: 0.8rem;
    color: #000;
  }
}