/* MaiML Course Stylesheet - Tufte-inspired typography and minimal aesthetics */
:root {
  --bg-color: #fffff8;
  --text-color: #111111;
  --link-color: #b92b27;
  --code-bg: #f4f4ec;
  --border-color: #e0e0d8;
  --accent-color: #1565c0;
  --success-color: #2e7d32;
  --font-serif: "ETBembo", "Palatino Linotype", "Palatino", "Book Antiqua", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Fira Code", Menlo, Monaco, Consolas, "Courier New", monospace;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1.6;
  max-width: 820px;
  margin: 40px auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.25;
  color: #222;
}

h1 { font-size: 2.2rem; margin-bottom: 0.2rem; }
.subtitle { font-family: var(--font-sans); color: #666; font-size: 1.1rem; margin-top: 0; margin-bottom: 2rem; border-bottom: 1px solid var(--border-color); padding-bottom: 1rem; }

h2 { font-size: 1.5rem; margin-top: 2rem; border-bottom: 1px solid var(--border-color); padding-bottom: 0.3rem; }
h3 { font-size: 1.2rem; margin-top: 1.5rem; }

p, ul, ol {
  margin: 1rem 0;
}

li {
  margin-bottom: 0.4rem;
}

a {
  color: var(--link-color);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--code-bg);
  padding: 2px 5px;
  border-radius: 3px;
}

pre {
  background-color: var(--code-bg);
  border: 1px solid var(--border-color);
  padding: 1rem;
  overflow-x: auto;
  border-radius: 4px;
}

pre code {
  background: none;
  padding: 0;
}

blockquote {
  border-left: 3px solid var(--accent-color);
  margin: 1.5rem 0;
  padding: 0.5rem 1rem;
  background-color: rgba(21, 101, 192, 0.04);
  font-style: italic;
}

.box {
  background-color: #fafaf5;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.2rem;
  margin: 1.5rem 0;
}

.quiz {
  background-color: #f7f9fc;
  border: 1px solid #d0dbe5;
  border-radius: 6px;
  padding: 1.2rem;
  margin: 1.5rem 0;
}

.quiz h4 {
  margin-top: 0;
  color: var(--accent-color);
}

.quiz-option {
  display: block;
  margin: 0.6rem 0;
  padding: 0.6rem 1rem;
  background: #ffffff;
  border: 1px solid #ccd8e2;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

.quiz-option:hover {
  background: #eef4fa;
  border-color: var(--accent-color);
}

.feedback {
  margin-top: 1rem;
  padding: 0.8rem;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  display: none;
}
.feedback.correct {
  background-color: #e8f5e9;
  color: #1b5e20;
  border: 1px solid #a5d6a7;
}
.feedback.incorrect {
  background-color: #ffebee;
  color: #b71c1c;
  border: 1px solid #ef9a9a;
}

.meta-nav {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: #666;
  display: flex;
  justify-content: space-between;
}