:root {
  --brand-primary: #4b2e83;  /* UiTM purple */
  --brand-accent:  #666666;  /* neutral gray accent for minimalist style */

  --font-body: "Inter", "Segoe UI", Roboto, Arial, sans-serif;
  --font-head: "Inter", "Segoe UI", Roboto, Arial, sans-serif;
}

/* Minimalist feel */
body {
  font-family: var(--font-body);
  background-color: #ffffff;
  color: #222;
  line-height: 1.6;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--brand-primary);
}

/* Links */
a { color: var(--brand-primary); text-decoration: none; }
a:hover { color: var(--brand-accent); }

/* Sidebar / TOC */
.sidebar nav a.active {
  border-left: 3px solid var(--brand-primary);
  background: #f8f8f8;
}

/* Callouts */
.callout {
  border-radius: 8px;
  border-left: 4px solid var(--brand-primary);
}

/* Figures */
figcaption {
  font-size: 0.9rem;
  color: #555;
  text-align: center;
}