src/styles.css

/* ===========================
   ROOT / THEME VARIABLES
   =========================== */

:root {
  --brand-color: #005bbb;
  --accent-color: #1e88e5;
  --heading-color: #1a1a1a;
  --text-color: #222;
  --bg-color: #ffffff;
  --sidebar-bg: #f5f7fa;
  --border-color: #e3e6eb;
  --code-bg: #f6f8fa;
  --code-border: #dcdfe3;
}

/* ===========================
   GLOBAL TYPOGRAPHY
   =========================== */

body {
  font-family: "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-color);
  background-color: var(--bg-color);
  line-height: 1.6;
}

/* Improve headings spacing */
h1, h2, h3, h4 {
  font-weight: 600;
  color: var(--heading-color);
  margin-top: 2rem;
  margin-bottom: 1rem;
}

/* Highlight section titles */
h2::after, h3::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  background: var(--brand-color);
  margin-top: 6px;
}

/* ===========================
   SIDEBAR STYLING
   =========================== */

.sidebar {
  background: var(--sidebar-bg) !important;
  border-right: 1px solid var(--border-color);
}

.sidebar nav a {
  font-size: 0.95rem;
  font-weight: 500;
}

.sidebar .active > a {
  color: var(--brand-color) !important;
}

/* ===========================
   CODE & BLOCKS
   =========================== */

pre, code {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 6px;
}

/* Larger code font for readability */
code {
  font-size: 0.9rem;
  padding: 2px 4px;
}

pre {
  padding: 10px;
  font-size: 0.9rem;
  overflow-x: auto;
}

/* Code block titles (Quarto callouts) */
figure > pre {
  border-left: 4px solid var(--brand-color);
}

/* ===========================
   TABLES
   =========================== */

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

table th {
  background: var(--sidebar-bg);
  font-weight: 600;
}

table th, table td {
  border: 1px solid var(--border-color);
  padding: 8px 10px;
}

/* ===========================
   CALLOUTS (notes, warnings, tips)
   =========================== */

.callout-note {
  border-left: 5px solid var(--brand-color);
  background: #eef5ff;
}

.callout-warning {
  border-left: 5px solid #e63946;
  background: #fdecea;
}

/* ===========================
   FIGURES & IMAGES
   =========================== */

figure {
  margin: 2rem auto;
  text-align: center;
}

figcaption {
  font-size: 0.9rem;
  color: #555;
  margin-top: 0.4rem;
  font-style: italic;
}

/* ===========================
   LINKS / HOVER EFFECTS
   =========================== */

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

/* ===========================
   LIST STYLING
   =========================== */

ul, ol {
  margin-left: 1.25rem;
  padding-left: 0.75rem;
}

/* ===========================
   RESEARCH/PAPER LOOK ENHANCERS
   =========================== */

blockquote {
  border-left: 4px solid var(--brand-color);
  padding: 8px 12px;
  background: #f6faff;
  font-style: italic;
  color: #555;
}

/* Card element (optional) */
.card {
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1rem;
  background: white;
  margin-bottom: 1rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.03);
}

/* ===========================
   FOOTER
   =========================== */

footer {
  border-top: 1px solid var(--border-color);
  margin-top: 3rem;
  padding: 1rem 0;
  color: #666;
  font-size: 0.85rem;
}

/* ===========================
   RESPONSIVE ADJUSTMENTS
   =========================== */

@media (max-width: 768px) {
  h2::after, h3::after {
    width: 32px;
  }
  pre {
    font-size: 0.85rem;
  }
}