body {
  padding-top: 56px;
  background-color: rgb(229, 229, 229);
}
.left-aligned {
  margin-left: auto;
}
.bg-dark {
  background-color: #83b0a2 !important;
}
.bg-hero {
  background-color: rgb(220, 198, 128);
}

p,
li {
  text-align: justify;
}

/* CALLOUT */
.bd-callout {
  padding: 1.25rem;
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
  border: 1px solid #e9ecef;
  border-left-width: 0.25rem;
  border-radius: 0.25rem;
}
.bd-callout h4 {
  margin-bottom: 1.25rem;
}
.bd-callout p:last-child {
  margin-bottom: 0;
}
.bd-callout code {
  border-radius: 0.25rem;
}
.bd-callout + .bd-callout {
  margin-top: -0.25rem;
}
.bd-callout-info {
  border-left-color: #5bc0de;
}
.bd-callout-warning {
  border-left-color: #f0ad4e;
}
.bd-callout-danger {
  border-left-color: #d9534f;
}

/* footer */
footer a {
  color: white;
  font-weight: bold;
  text-decoration: none;
}
footer a:hover {
  color: white;
  text-decoration: underline;
}

/* custom */
:root {
  --page-bg: #f6f7f9;
  --card-bg: #ffffff;
  --muted: black;
  --accent: #2b6cb0;
  --border: #e6e9ef;
  --radius: 12px;
  --maxw: 1100px;
  --gap: 22px;
}
* {
  box-sizing: border-box;
}

.page {
  max-width: var(--maxw);
  margin: 28px auto;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--gap);
  padding: 20px;
}
.toc {
  position: sticky;
  top: 80px;
  align-self: start;
}
.toc-inner {
  background: var(--card-bg);
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 18px;
  box-shadow: 0 6px 18px rgba(30, 41, 59, 0.04);
}
.toc h2 {
  margin: 0 0 10px 0;
  font-size: 18px;
  color: var(--muted);
}
.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.toc a {
  text-decoration: none;
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 8px;
  display: inline-block;
  font-size: 14px;
}
.toc a:hover {
  background: #f1f5f9;
  color: #0b1220;
}
.content {
  padding: 0;
  margin: 0;
}
.page-header {
  grid-column: 2 / 3;
  margin-bottom: 8px;
}
.page-header h1 {
  margin: 0;
  font-size: 28px;
  color: var(--muted);
  line-height: 1.05;
}
.page-header .subtitle {
  margin: 6px 0 0 0;
  color: var(--muted);
  font-size: 14px;
}
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(30, 41, 59, 0.04);
  margin-bottom: var(--gap);
  scroll-margin-top: 80px;
}
.card h2 {
  margin: 0 0 12px 0;
  font-size: 18px;
  color: var(--muted);
}
.card p {
  margin: 8px 0;
  color: var(--muted);
  line-height: 1.55;
  font-size: 15px;
  color: var(--muted);
}
.card ul,
.card ol {
  margin: 8px 0 8px 20px;
  color: var(--muted);
}

.card ul li,
.card ol li {
  margin: 6px 0;
}
.lead {
  color: var(--muted);
  font-size: 15px;
}
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.references p {
  margin: 6px 0;
  color: var(--muted);
  font-size: 14px;
}
.references {
  list-style: none;
  padding-left: 0;
  margin: 0;
}
.references li {
  margin-bottom: 12px;
  font-size: 15px;
  line-height: 1.6;
  padding-bottom: 7px;
}
.references a {
  color: var(--accent);
  text-decoration: none;
  word-break: break-all;
}
.references a:hover {
  text-decoration: underline;
}
.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}
@media (max-width: 980px) {
  .page {
    grid-template-columns: 1fr;
    padding: 16px;
  }
  .toc {
    position: relative;
    order: 2;
  }
  .page-header {
    order: 1;
    margin-bottom: 12px;
  }
  .two-col {
    grid-template-columns: 1fr;
  }
}