/* Shared stylesheet for the Cognitive Impairment course.
   Tufte-inspired: generous margins, readable serif body, restrained palette.
   Every lesson links this file: <link rel="stylesheet" href="../assets/lesson.css"> */

:root {
  --ink: #e7e4dc;         /* warm off-white body text */
  --paper: #16171a;       /* near-black page background */
  --muted: #9a978f;
  --rule: #33353b;
  --accent: #e79079;      /* warm coral — the brick red, lifted for dark bg */
  --accent-soft: #3a2723; /* dark brick tint, for chips/soft backgrounds */
  --good: #86c79a;
  --warn: #e0b566;
  --bad: #e79079;
  --panel: #202227;       /* raised surface for callouts/quizzes */
  --code-bg: #292b31;
  --max-width: 42rem;
}

html { font-size: 18px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 4rem 1.5rem 6rem;
  background: var(--paper);
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

/* ---- Typographic scale ---- */
h1, h2, h3 { font-weight: 600; line-height: 1.2; letter-spacing: -0.01em; }
h1 { font-size: 2.1rem; margin: 0 0 0.25rem; }
h2 { font-size: 1.45rem; margin: 2.6rem 0 0.6rem; }
h3 { font-size: 1.12rem; margin: 1.8rem 0 0.4rem; }

.subtitle { font-size: 1.05rem; color: var(--muted); font-style: italic; margin: 0 0 1.5rem; }

p, li { font-size: 1rem; }
a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent-soft); }
a:hover { border-bottom-color: var(--accent); }

strong { font-weight: 600; }
em { font-style: italic; }

/* ---- Header / footer chrome ---- */
.lesson-meta {
  font-family: -apple-system, "Helvetica Neue", sans-serif;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.8rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

hr { border: none; border-top: 1px solid var(--rule); margin: 2.5rem 0; }

/* ---- Callout panels ---- */
.callout {
  background: var(--panel);
  border-left: 3px solid var(--accent);
  padding: 0.9rem 1.1rem;
  margin: 1.5rem 0;
  border-radius: 0 4px 4px 0;
  font-size: 0.96rem;
}
.callout .label {
  font-family: -apple-system, sans-serif;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 700;
  display: block;
  margin-bottom: 0.3rem;
}
.callout.mission { border-left-color: var(--good); }
.callout.mission .label { color: var(--good); }
.callout.key { border-left-color: var(--warn); background: #2a2620; }
.callout.key .label { color: var(--warn); }

/* ---- Margin notes (Tufte sidenotes; collapse inline on narrow screens) ---- */
.note { color: var(--muted); font-size: 0.9rem; font-style: italic; }

/* ---- Citations ---- */
.cite { font-size: 0.82rem; vertical-align: super; line-height: 0; }
.refs { font-size: 0.85rem; color: var(--muted); }
.refs li { margin-bottom: 0.4rem; }

/* ---- Code / mono ---- */
code, .mono { font-family: "SF Mono", "JetBrains Mono", Menlo, monospace; font-size: 0.85em; background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 3px; }

/* ---- Tables ---- */
table { border-collapse: collapse; width: 100%; margin: 1.5rem 0; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.55rem 0.7rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-family: -apple-system, sans-serif; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 700; }
tbody tr:hover { background: var(--accent-soft); }

/* ---- Domain chips ---- */
.chip { display: inline-block; font-family: -apple-system, sans-serif; font-size: 0.7rem; font-weight: 600; padding: 0.15rem 0.5rem; border-radius: 999px; background: var(--accent-soft); color: var(--accent); letter-spacing: 0.03em; }

/* ---- Quiz / interactive widget styling (used with ../assets/quiz.js) ---- */
.quiz { margin: 1.6rem 0; padding: 1.2rem 1.3rem; background: var(--panel); border: 1px solid var(--rule); border-radius: 6px; }
.quiz .q { font-weight: 600; margin-bottom: 0.8rem; }
.quiz .options { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.quiz .options li { margin: 0; }
.quiz button.opt {
  width: 100%; text-align: left; font-family: inherit; font-size: 0.95rem;
  padding: 0.6rem 0.8rem; background: var(--paper); color: var(--ink); border: 1px solid var(--rule);
  border-radius: 5px; cursor: pointer; transition: background 0.12s, border-color 0.12s;
}
.quiz button.opt:hover { border-color: var(--accent); }
.quiz button.opt.correct { background: #1e3025; border-color: var(--good); }
.quiz button.opt.wrong { background: #35211d; border-color: var(--bad); }
.quiz button.opt:disabled { cursor: default; opacity: 0.85; }
.quiz .feedback { margin-top: 0.8rem; font-size: 0.92rem; min-height: 1.2em; }
.quiz .feedback.correct { color: var(--good); }
.quiz .feedback.wrong { color: var(--bad); }
.reveal { margin-top: 0.5rem; }
.reveal summary { cursor: pointer; color: var(--accent); font-size: 0.9rem; }

/* ---- Nav between lessons ---- */
.lesson-nav { display: flex; justify-content: space-between; margin-top: 3.5rem; padding-top: 1.2rem; border-top: 1px solid var(--rule); font-size: 0.9rem; }

/* ---- Ask-your-teacher reminder ---- */
.ask-teacher { margin-top: 2.5rem; padding: 0.9rem 1.1rem; background: var(--accent-soft); border-radius: 6px; font-size: 0.92rem; }
.ask-teacher .label { font-weight: 700; color: var(--accent); }

@media print {
  /* Restore a light palette for paper — dark backgrounds waste ink and print poorly */
  :root {
    --ink: #1a1a1a; --paper: #fff; --muted: #555; --rule: #ccc;
    --accent: #8a3324; --accent-soft: #f4e9e6; --panel: #f5f2ea; --code-bg: #eee;
  }
  body { max-width: 100%; padding: 0; font-size: 11pt; background: #fff; color: #1a1a1a; }
  .callout.key { background: #faf6ea; }
  .quiz button.opt { border: 1px solid #999; }
  .quiz button.opt.correct { background: #e6f0e8; }
  .quiz button.opt.wrong { background: #f6e4e1; }
  a { color: var(--ink); border: none; }
  .lesson-nav, .ask-teacher { display: none; }
}