/* ===== Teaching Workspace — Shared Stylesheet ===== */
/* Clean, readable typography. Tufte-inspired. Prints well. */

:root {
  --font-body: 'Georgia', 'Times New Roman', serif;
  --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --color-bg: #fffff8;
  --color-text: #111;
  --color-text-muted: #555;
  --color-accent: #e25822;
  --color-link: #2563eb;
  --color-link-hover: #1d4ed8;
  --color-border: #ddd;
  --color-code-bg: #f5f5f0;
  --color-highlight: #fff3cd;
  --color-success: #059669;
  --color-info: #2563eb;
  --max-width: 740px;
  --sidebar-width: 200px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; }

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  padding: 2rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

/* ===== Typography ===== */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

h1 { font-size: 2rem; font-weight: 700; border-bottom: 2px solid var(--color-text); padding-bottom: 0.3rem; }
h2 { font-size: 1.5rem; font-weight: 600; color: var(--color-text); margin-top: 2.5rem; }
h3 { font-size: 1.15rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; color: var(--color-text-muted); }

p { margin-bottom: 1rem; }

a { color: var(--color-link); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--color-link-hover); }

blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 0.5rem 1rem;
  margin: 1.5rem 0;
  color: var(--color-text-muted);
  font-style: italic;
}

/* ===== Code ===== */
code {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  background: var(--color-code-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
}

pre {
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  line-height: 1.5;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.85rem;
}

/* ===== Lists ===== */
ul, ol { margin: 0.5rem 0 1rem 1.5rem; }
li { margin-bottom: 0.3rem; }

/* ===== Tables ===== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

th, td {
  text-align: left;
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--color-border);
}

th {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-muted);
}

/* ===== Lesson-specific ===== */
.lesson-meta {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.lesson-meta span { margin-right: 1.5rem; }

.key-concept {
  background: var(--color-highlight);
  border-left: 4px solid var(--color-accent);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 6px 6px 0;
}

.key-concept strong { display: block; margin-bottom: 0.3rem; }

.diagram-container {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  text-align: center;
}

.diagram-container svg { max-width: 100%; height: auto; }

.nav-links {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-heading);
  font-size: 0.9rem;
}

.citation {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  vertical-align: super;
}

.sidebar-note {
  float: right;
  clear: right;
  width: 200px;
  margin-right: -240px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.callout {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}

.callout-info { border-left: 4px solid var(--color-info); }
.callout-success { border-left: 4px solid var(--color-success); }
.callout-warning { border-left: 4px solid var(--color-accent); background: #fffaf5; }
.callout-danger { border-left: 4px solid #dc2626; background: #fff6f6; }

.callout-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
}

/* ===== Verdict badges (for decision-oriented lessons/references) ===== */
.verdict {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  white-space: nowrap;
}

.verdict-yes { background: #d1fae5; color: #065f46; }
.verdict-maybe { background: var(--color-highlight); color: #92700c; }
.verdict-no { background: #fee2e2; color: #991b1b; }

/* ===== Decision Tool Widget ===== */
.decision-tool {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2rem 0;
  background: #fafaf5;
}

.decision-tool .decision-step,
.decision-tool .decision-result { display: none; }
.decision-tool .decision-step.active,
.decision-tool .decision-result.active { display: block; }

.decision-question {
  font-family: var(--font-heading);
  font-weight: 600;
  margin-bottom: 1rem;
}

.decision-options { list-style: none; margin: 0; padding: 0; }

.decision-options li {
  padding: 0.7rem 1rem;
  margin-bottom: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  font-family: var(--font-heading);
  font-size: 0.9rem;
}

.decision-options li:hover { background: #f0f0ea; border-color: #bbb; }

.decision-verdict {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.decision-trail {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  min-height: 1rem;
}

.decision-controls {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-heading);
  font-size: 0.8rem;
}

.decision-controls button {
  font: inherit;
  background: none;
  border: none;
  color: var(--color-link);
  cursor: pointer;
  padding: 0;
  margin-right: 1.25rem;
}

.decision-controls button:hover { color: var(--color-link-hover); text-decoration: underline; }
.decision-controls button[hidden] { display: none; }

/* ===== Quiz Widget ===== */
.quiz {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2rem 0;
  background: #fafaf5;
}

.quiz-question {
  font-weight: 600;
  margin-bottom: 1rem;
  font-family: var(--font-heading);
}

.quiz-options { list-style: none; margin: 0; padding: 0; }

.quiz-options li {
  padding: 0.7rem 1rem;
  margin-bottom: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  font-family: var(--font-heading);
  font-size: 0.9rem;
}

.quiz-options li:hover { background: #f0f0ea; border-color: #bbb; }
.quiz-options li.correct { background: #d1fae5; border-color: var(--color-success); }
.quiz-options li.incorrect { background: #fee2e2; border-color: #dc2626; }
.quiz-options li.disabled { pointer-events: none; opacity: 0.7; }

.quiz-feedback {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
  display: none;
}

.quiz-feedback.show { display: block; }
.quiz-feedback.correct { background: #d1fae5; color: #065f46; }
.quiz-feedback.incorrect { background: #fee2e2; color: #991b1b; }

/* ===== Print ===== */
@media print {
  body { max-width: none; padding: 0; font-size: 12pt; }
  .nav-links, .quiz, .decision-tool, .callout, .key-concept { page-break-inside: avoid; }
  .decision-tool .decision-step, .decision-tool .decision-result { display: block; }
  .decision-controls { display: none; }
  a { color: var(--color-text); text-decoration: none; }
  a[href]::after { content: " (" attr(href) ")"; font-size: 0.8em; color: var(--color-text-muted); }
  pre { border: 1px solid #ccc; }
}

/* ===== Responsive ===== */
@media (max-width: 800px) {
  .sidebar-note { float: none; width: 100%; margin: 1rem 0; padding: 0.5rem; background: var(--color-code-bg); border-radius: 4px; }
}