/* Shared stylesheet for AZ-900 teaching workspace: lessons + reference docs.
   Tufte-ish: serif body text, generous margins, restrained color, prints cleanly. */

:root {
  --bg: #fdfcf9;
  --text: #1a1a1a;
  --text-muted: #5a5a5a;
  --accent: #0f6cbd;      /* Azure-ish blue, used sparingly */
  --accent-soft: #e8f1fb;
  --rule: #d8d3c8;
  --code-bg: #f3f1ea;
  --warn-bg: #fff4e5;
  --warn-border: #d98c00;
  --good-bg: #eaf7ee;
  --good-border: #1e8e3e;
  --bad-bg: #fdecea;
  --bad-border: #c5221f;
  --max-width: 40rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1b18;
    --text: #ecebe6;
    --text-muted: #a8a49a;
    --accent: #6cb2f4;
    --accent-soft: #17324a;
    --rule: #3a382f;
    --code-bg: #26241d;
    --warn-bg: #3a2f14;
    --warn-border: #d9a300;
    --good-bg: #163420;
    --good-border: #3fb96a;
    --bad-bg: #3a1917;
    --bad-border: #e5615c;
  }
}

:root[data-theme="dark"] {
  --bg: #1b1b18;
  --text: #ecebe6;
  --text-muted: #a8a49a;
  --accent: #6cb2f4;
  --accent-soft: #17324a;
  --rule: #3a382f;
  --code-bg: #26241d;
  --warn-bg: #3a2f14;
  --warn-border: #d9a300;
  --good-bg: #163420;
  --good-border: #3fb96a;
  --bad-bg: #3a1917;
  --bad-border: #e5615c;
}

:root[data-theme="light"] {
  --bg: #fdfcf9;
  --text: #1a1a1a;
  --text-muted: #5a5a5a;
  --accent: #0f6cbd;
  --accent-soft: #e8f1fb;
  --rule: #d8d3c8;
  --code-bg: #f3f1ea;
  --warn-bg: #fff4e5;
  --warn-border: #d98c00;
  --good-bg: #eaf7ee;
  --good-border: #1e8e3e;
  --bad-bg: #fdecea;
  --bad-border: #c5221f;
}

* { box-sizing: border-box; }

html { color-scheme: light dark; }

body {
  margin: 0 auto;
  padding: 3.5rem 1.5rem 6rem;
  max-width: var(--max-width);
  background: var(--bg);
  color: var(--text);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  font-size: 1.08rem;
  line-height: 1.65;
}

.kicker {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

h1 {
  font-size: 1.9rem;
  line-height: 1.2;
  margin: 0 0 0.3rem;
}

h2 {
  font-size: 1.3rem;
  margin: 2.4rem 0 0.8rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--rule);
}

h3 {
  font-size: 1.05rem;
  margin: 1.6rem 0 0.5rem;
}

p { margin: 0 0 1rem; }

.lede {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.8rem;
}

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

code, pre {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  border-radius: 4px;
}
code { padding: 0.1em 0.35em; }
pre { padding: 1rem; overflow-x: auto; }
pre code { padding: 0; background: none; }

ul, ol { padding-left: 1.4rem; }
li { margin-bottom: 0.35rem; }

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

blockquote {
  margin: 1rem 0;
  padding: 0.2rem 1rem;
  border-left: 3px solid var(--accent);
  color: var(--text-muted);
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0 1.5rem;
  font-size: 0.95rem;
}
th, td {
  text-align: left;
  padding: 0.5rem 0.7rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
th { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); }

/* Callout boxes */
.box {
  border-radius: 6px;
  padding: 1rem 1.2rem;
  margin: 1.4rem 0;
  font-size: 0.97rem;
}
.box.note { background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); }
.box.warn { background: var(--warn-bg); border: 1px solid var(--warn-border); }
.box.source {
  background: none;
  border: 1px solid var(--rule);
  font-size: 0.9rem;
  color: var(--text-muted);
}
.box.source a { color: var(--accent); }
.box p:last-child { margin-bottom: 0; }

/* Sidenote-style citations */
.cite {
  font-size: 0.85em;
  vertical-align: super;
  color: var(--accent);
}

/* Nav links between lessons */
.lesson-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
}

/* Ask-your-teacher reminder */
.ask-teacher {
  margin-top: 2.5rem;
  font-size: 0.92rem;
  color: var(--text-muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

@media print {
  body { max-width: 100%; padding: 0; font-size: 11pt; }
  .box.note, .box.warn { border: 1px solid #999; background: none; }
  .ask-teacher, .lesson-nav { display: none; }
  a { color: inherit; text-decoration: none; }
}