/* YP-DSA Book — visual style mirrors Pisan's classroom: code-first, low ornament. */

:root {
  --yp-accent: #4b2e83;          /* UW purple */
  --yp-accent-soft: #b7a57a;      /* UW gold */
  --yp-code-bg: #f6f8fa;
  --yp-warn: #c0392b;
  --yp-good: #27744a;
  --yp-mono: "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
}

body {
  font-feature-settings: "liga" 1, "calt" 1;
}

h1, h2, h3, h4 {
  letter-spacing: -0.01em;
}

code, pre {
  font-family: var(--yp-mono);
  font-size: 0.92em;
}

/* Inline code that mentions LeetCode problem numbers like #1, #98, #200 */
.lc {
  display: inline-block;
  padding: 0 6px;
  border-radius: 4px;
  background: var(--yp-accent);
  color: white;
  font-family: var(--yp-mono);
  font-size: 0.82em;
  text-decoration: none;
}
.lc:hover { background: var(--yp-accent-soft); color: black; }

/* "Try it" exercise block */
.try-it {
  border-left: 4px solid var(--yp-accent);
  background: #f9f8fb;
  padding: 0.8em 1em;
  margin: 1em 0;
  border-radius: 4px;
}
.try-it::before {
  content: "Try it";
  display: block;
  font-weight: 700;
  color: var(--yp-accent);
  margin-bottom: 0.3em;
  text-transform: uppercase;
  font-size: 0.78em;
  letter-spacing: 0.06em;
}

/* "Common mistake" warning */
.gotcha {
  border-left: 4px solid var(--yp-warn);
  background: #fdf3f2;
  padding: 0.8em 1em;
  margin: 1em 0;
  border-radius: 4px;
}
.gotcha::before {
  content: "Common mistake";
  display: block;
  font-weight: 700;
  color: var(--yp-warn);
  margin-bottom: 0.3em;
  text-transform: uppercase;
  font-size: 0.78em;
  letter-spacing: 0.06em;
}

/* "Pisan's note" — short instructor commentary in voice */
.pisan {
  border-left: 4px solid var(--yp-good);
  background: #f1f8f3;
  padding: 0.8em 1em;
  margin: 1em 0;
  border-radius: 4px;
  font-style: italic;
}
.pisan::before {
  content: "Note";
  display: block;
  font-weight: 700;
  color: var(--yp-good);
  margin-bottom: 0.3em;
  font-style: normal;
  text-transform: uppercase;
  font-size: 0.78em;
  letter-spacing: 0.06em;
}

/* MCQ widget styling */
.quiz {
  border: 1px solid #e4e2e0;
  border-radius: 6px;
  padding: 1em;
  margin: 1.2em 0;
  background: #fcfcfd;
}
.quiz .question {
  font-weight: 600;
  margin-bottom: 0.6em;
}
.quiz ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}
.quiz li {
  margin: 0.3em 0;
}
.quiz label {
  display: block;
  padding: 0.4em 0.6em;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
}
.quiz label:hover { background: #f3f1ee; }
.quiz .correct label { border-color: var(--yp-good); background: #eaf6ef; }
.quiz .wrong label   { border-color: var(--yp-warn); background: #fbeae7; }
.quiz .explain {
  margin-top: 0.7em;
  padding: 0.6em;
  background: #f5f3ef;
  border-radius: 4px;
  font-size: 0.92em;
  display: none;
}
.quiz.revealed .explain { display: block; }

/* Big-O "growth" table coloring */
table.bigO td.fast    { background: #eaf6ef; }
table.bigO td.medium  { background: #fbf7e8; }
table.bigO td.slow    { background: #fbeae7; }

/* Mark commented-out debug lines visually (a signature Pisan habit) */
pre code .co.debug {
  color: #6f42c1;
  background: rgba(111, 66, 193, 0.07);
}

/* Compact lecture-summary boxes */
.summary-card {
  background: #f7f6f3;
  border-radius: 6px;
  padding: 1em 1.2em;
  margin: 1.5em 0;
}
.summary-card h4 {
  margin-top: 0;
  color: var(--yp-accent);
}

/* Side-by-side code comparison */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1em;
  margin: 1em 0;
}
@media (max-width: 700px) {
  .compare { grid-template-columns: 1fr; }
}
.compare .label {
  font-size: 0.82em;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #555;
}