/* ==========================================================================
   Elasticsearch course — shared stylesheet
   Tufte-inspired: quiet typography, generous margins, prints well.
   Linked by every lesson and reference doc for one consistent course look.
   ========================================================================== */

:root {
  --ink:        #1a1a1a;
  --ink-soft:   #454545;
  --ink-faint:  #6b6b6b;
  --bg:         #fdfcf9;
  --rule:       #e3e0d8;
  --accent:     #b23a1e;   /* Elastic-ish warm terracotta */
  --accent-2:   #2b6a7a;   /* teal, for filter/secondary */
  --code-bg:    #f3f1ea;
  --good:       #2f7d42;
  --bad:        #b23a1e;
  --maxw:       46rem;
}

* { box-sizing: border-box; }

html { font-size: 17px; }

body {
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, "Georgia", serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  margin: 0 auto;
  padding: 3rem 1.5rem 6rem;
  max-width: var(--maxw);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---- Header / meta ------------------------------------------------------ */

.eyebrow {
  font-family: "SF Mono", "IBM Plex Mono", ui-monospace, Menlo, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.6rem;
}

h1 {
  font-size: 2.1rem;
  line-height: 1.12;
  font-weight: 600;
  margin: 0 0 0.4rem;
  letter-spacing: -0.01em;
}

.subtitle {
  font-size: 1.12rem;
  color: var(--ink-soft);
  font-style: italic;
  margin: 0 0 1.4rem;
}

h2 {
  font-size: 1.35rem;
  font-weight: 600;
  margin: 2.6rem 0 0.8rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--rule);
}

h3 {
  font-size: 1.08rem;
  font-weight: 600;
  margin: 1.8rem 0 0.5rem;
}

p { margin: 0 0 1rem; }

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid rgba(178,58,30,0.28); }
a:hover { border-bottom-color: var(--accent); }

strong { font-weight: 600; }

/* ---- Meta line under title --------------------------------------------- */
.meta {
  font-family: "SF Mono", "IBM Plex Mono", ui-monospace, Menlo, monospace;
  font-size: 0.75rem;
  color: var(--ink-faint);
  letter-spacing: 0.03em;
  margin: -0.8rem 0 2rem;
}
.meta span + span::before { content: "  ·  "; color: var(--rule); }

/* ---- Callouts ----------------------------------------------------------- */

.callout {
  border-left: 3px solid var(--accent-2);
  background: #f4f7f8;
  padding: 0.85rem 1.1rem;
  margin: 1.4rem 0;
  border-radius: 0 4px 4px 0;
}
.callout .label {
  font-family: "SF Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  display: block;
  margin-bottom: 0.3rem;
}
.callout.warn      { border-left-color: var(--accent); background: #fbf3f0; }
.callout.warn .label { color: var(--accent); }
.callout.key       { border-left-color: #caa63a; background: #fbf8ec; }
.callout.key .label  { color: #9a7d1e; }

.callout p:last-child { margin-bottom: 0; }

/* ---- Code --------------------------------------------------------------- */

code {
  font-family: "SF Mono", "IBM Plex Mono", ui-monospace, Menlo, monospace;
  font-size: 0.82em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

pre {
  font-family: "SF Mono", "IBM Plex Mono", ui-monospace, Menlo, monospace;
  font-size: 0.8rem;
  line-height: 1.5;
  background: var(--code-bg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  margin: 1.2rem 0;
}
pre code { background: none; padding: 0; font-size: inherit; }

.c-key   { color: var(--accent-2); }
.c-str   { color: var(--good); }
.c-com   { color: var(--ink-faint); font-style: italic; }

/* ---- Tables ------------------------------------------------------------- */

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.4rem 0;
  font-size: 0.92rem;
}
th, td {
  text-align: left;
  padding: 0.5rem 0.7rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
th {
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border-bottom: 2px solid var(--ink-soft);
}

/* ---- Sidenote / aside --------------------------------------------------- */
.aside {
  font-size: 0.86rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 0.7rem 0;
  margin: 1.4rem 0;
}

/* ---- Cite links --------------------------------------------------------- */
.cite {
  font-size: 0.78rem;
  color: var(--ink-faint);
}
.cite a { color: var(--ink-faint); border-bottom-color: var(--rule); }

/* ---- Footer nav --------------------------------------------------------- */
.lesson-footer {
  margin-top: 3.5rem;
  padding-top: 1.2rem;
  border-top: 2px solid var(--ink-soft);
  font-size: 0.9rem;
}
.lesson-footer h3 { margin-top: 0; }
.nav-links { display: flex; flex-wrap: wrap; gap: 0.4rem 1.4rem; margin: 0.6rem 0; }

.teacher-reminder {
  margin-top: 1.6rem;
  font-style: italic;
  color: var(--ink-soft);
  background: #f4f7f8;
  border-radius: 6px;
  padding: 0.8rem 1rem;
}

/* ---- Primary source box ------------------------------------------------- */
.primary-source {
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 1rem 1.1rem;
  margin: 1.6rem 0;
  background: #fff;
}
.primary-source .label {
  font-family: "SF Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 0.35rem;
}

/* ---- Print -------------------------------------------------------------- */
@media print {
  :root { --bg: #fff; }
  body { padding: 0; max-width: 100%; font-size: 11pt; }
  a { color: var(--ink); border: none; }
  .quiz-check, .lesson-footer .nav-links { break-inside: avoid; }
  pre, table, .callout, .quiz-q { break-inside: avoid; }
}