/* ==========================================================================
   courses.dadams.io additions
   Loaded after css/custom.css (a verbatim copy of dadams.io's theme), so
   everything here reads the same tokens: --accent, --bg-elev, --term-*, ...
   ========================================================================== */

/* ---------- Footer links in the statusline ---------- */
a.sl-link { color: var(--term-blue); text-decoration: none; }
a.sl-link:hover { color: var(--term-cyan); text-decoration: underline; }

/* ---------- Lecture search ---------- */
.lecture-search { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1.5rem; margin-top: 1.5rem; }
.lecture-search .grep-box { flex: 1 1 22rem; }
.lecture-search-count { margin: 0; font-family: var(--font-mono); font-size: 0.85rem; color: var(--muted); }
.lecture-empty { margin: 1.5rem 0 0; font-family: var(--font-mono); color: var(--red); }

/* ---------- Course sections ---------- */
.course-block { scroll-margin-top: calc(var(--nav-h) + 1rem); }
.course-section > h2 {
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.course-section > h2 i { margin-right: 0.5rem; color: var(--accent); }
.course-section > p { max-width: 50rem; color: var(--muted); }
.course-term { margin-left: 0.5rem; font-size: 0.75rem; font-weight: 500; color: var(--faint); vertical-align: 0.2em; }

.unit-controls { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0 0 1rem; }

/* accordion: one bordered row per unit */
.unit-section {
  margin-bottom: 0.6rem;
  overflow: hidden;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.unit-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 0.8rem 1rem;
  font: inherit;
  color: var(--text-strong);
  text-align: left;
  background: transparent;
  border: 0;
}
.unit-header:hover { background: var(--bg-sunk); }
.unit-header strong { font-weight: 600; }
.unit-header i.fa-chevron-right { width: 1em; color: var(--accent); transition: transform 0.15s ease; }
.unit-header.expanded { border-bottom: 1px dashed var(--border); }
.unit-header.expanded i.fa-chevron-right { transform: rotate(90deg); }
.lecture-count { flex: none; font-family: var(--font-mono); font-size: 0.76rem; color: var(--faint); white-space: nowrap; }
.lecture-count::before { content: "["; }
.lecture-count::after { content: "]"; }

.unit-content { display: none; }
.unit-content.expanded {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 0.75rem;
  padding: 1rem;
}
.lecture-item {
  display: flex;
  flex-direction: column;
  padding: 0.9rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s ease;
}
.lecture-item:hover { border-color: var(--accent); }
.lecture-item h5 { margin-bottom: 0.3rem; font-size: 1rem; font-weight: 600; color: var(--text-strong); }
.lecture-item p { flex: 1; margin-bottom: 0.7rem; font-size: 0.9rem; line-height: 1.5; color: var(--muted); }
.lecture-actions { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: auto; }
.lecture-item[hidden], .unit-section[hidden], .course-block[hidden] { display: none !important; }

/* ---------- Bootstrap components, re-skinned onto the theme ---------- */
.btn-primary,
.btn-outline-primary,
.btn-outline-secondary,
.btn-light,
.btn-youtube,
.discord-btn {
  font-family: var(--font-mono);
  font-weight: 500;
  border-radius: var(--radius-sm);
}
.btn-primary {
  --bs-btn-color: var(--on-accent);
  --bs-btn-bg: var(--accent);
  --bs-btn-border-color: var(--accent);
  --bs-btn-hover-color: var(--on-accent);
  --bs-btn-hover-bg: var(--accent-strong);
  --bs-btn-hover-border-color: var(--accent-strong);
  --bs-btn-active-color: var(--on-accent);
  --bs-btn-active-bg: var(--accent-strong);
  --bs-btn-active-border-color: var(--accent-strong);
  --bs-btn-focus-shadow-rgb: 23, 147, 209;
}
.btn-outline-primary {
  --bs-btn-color: var(--accent);
  --bs-btn-border-color: var(--border-strong);
  --bs-btn-hover-color: var(--accent);
  --bs-btn-hover-bg: var(--accent-soft);
  --bs-btn-hover-border-color: var(--accent);
  --bs-btn-active-color: var(--accent);
  --bs-btn-active-bg: var(--accent-soft);
  --bs-btn-active-border-color: var(--accent);
  --bs-btn-focus-shadow-rgb: 23, 147, 209;
}
.btn-outline-secondary,
.btn-light {
  --bs-btn-color: var(--text);
  --bs-btn-bg: transparent;
  --bs-btn-border-color: var(--border-strong);
  --bs-btn-hover-color: var(--text-strong);
  --bs-btn-hover-bg: var(--bg-sunk);
  --bs-btn-hover-border-color: var(--text);
  --bs-btn-active-color: var(--text-strong);
  --bs-btn-active-bg: var(--bg-sunk);
  --bs-btn-active-border-color: var(--text);
}
/* YouTube red, darkened so white text passes WCAG AA */
.btn-youtube {
  --bs-btn-color: #ffffff;
  --bs-btn-bg: #c4302b;
  --bs-btn-border-color: #c4302b;
  --bs-btn-hover-color: #ffffff;
  --bs-btn-hover-bg: #a3241f;
  --bs-btn-hover-border-color: #a3241f;
  --bs-btn-active-color: #ffffff;
  --bs-btn-active-bg: #a3241f;
  --bs-btn-active-border-color: #a3241f;
}
.discord-btn {
  --bs-btn-color: #ffffff;
  --bs-btn-bg: #4752c4;
  --bs-btn-border-color: #4752c4;
  --bs-btn-hover-color: #ffffff;
  --bs-btn-hover-bg: #3a44a8;
  --bs-btn-hover-border-color: #3a44a8;
}
.btn-sm { --bs-btn-font-size: 0.76rem; --bs-btn-padding-y: 0.25rem; --bs-btn-padding-x: 0.6rem; }
.btn-lg { --bs-btn-font-size: 0.95rem; }

.card {
  --bs-card-bg: var(--bg-elev);
  --bs-card-color: var(--text);
  --bs-card-title-color: var(--text-strong);
  --bs-card-subtitle-color: var(--muted);
  --bs-card-border-color: var(--border);
  --bs-card-border-radius: var(--radius);
  --bs-card-inner-border-radius: calc(var(--radius) - 1px);
  --bs-card-cap-bg: var(--bg-sunk);
  --bs-card-cap-color: var(--text-strong);
}
.card-header { font-family: var(--font-mono); }
.card-header h2, .card-header .h2 { font-family: var(--font-mono); font-size: 1.05rem !important; font-weight: 700; }
.card-header i { color: var(--accent); }
.card-title { font-weight: 600; }
.hover-lift { transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease; }
.hover-lift:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-2px); }

.feature-icon-small,
.feature-icon-small.text-bg-primary {
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1.1rem !important;
  color: var(--accent) !important;
  background: var(--accent-soft) !important;
  background-image: none !important;
  border-radius: var(--radius-sm) !important;
}

.table {
  --bs-table-color: var(--text);
  --bs-table-bg: transparent;
  --bs-table-border-color: var(--border);
  --bs-table-striped-bg: var(--bg-sunk);
  --bs-table-hover-color: var(--text-strong);
  --bs-table-hover-bg: var(--bg-sunk);
}
.table > thead th { font-family: var(--font-mono); font-size: 0.8rem; font-weight: 700; color: var(--muted); }
.table-light { --bs-table-color: var(--text); --bs-table-bg: var(--bg-sunk); --bs-table-border-color: var(--border); }

.list-group {
  --bs-list-group-bg: var(--bg-elev);
  --bs-list-group-color: var(--text);
  --bs-list-group-border-color: var(--border);
  --bs-list-group-action-hover-bg: var(--bg-sunk);
  --bs-list-group-action-hover-color: var(--text-strong);
}
.badge.bg-primary { background: var(--accent-soft) !important; color: var(--accent) !important; font-family: var(--font-mono); font-weight: 500; }
.badge.bg-secondary { background: var(--bg-sunk) !important; color: var(--muted) !important; font-family: var(--font-mono); font-weight: 500; }
.alert { --bs-alert-border-radius: var(--radius); }

/* legacy color helpers still used in page content */
.primary-blue, .secondary-blue { color: var(--accent); }
.primary-green, .secondary-green { color: var(--green); }
.primary-gray, .secondary-gray { color: var(--muted); }

/* ---------- Long-form pages (terms of use) ---------- */
.doc-section { max-width: 48rem; }
.doc-section h2 {
  margin: 2.25rem 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
}
.doc-section h2::before { content: "## "; color: var(--accent); }
.doc-section p, .doc-section li { line-height: 1.75; }

/* ---------- Handout pages ---------- */
.content-list { margin: 0; padding: 0; list-style: none; }
.content-list li { position: relative; margin-bottom: 0.55rem; padding-left: 1.4rem; }
.content-list li::before { content: "→"; position: absolute; left: 0; font-family: var(--font-mono); color: var(--green); }
.resource-card .card-header,
.course-card .card-header { gap: 0.25rem; }

/* Bootstrap's saturated card headers and text colors, mapped onto the palette */
.card-header.bg-primary,
.card-header.bg-success,
.card-header.bg-info,
.card-header.bg-secondary,
.card-header.bg-warning,
.card-header.bg-danger {
  color: var(--text-strong) !important;
  background: var(--bg-sunk) !important;
  border-top: 3px solid var(--accent);
}
.card-header.bg-success { border-top-color: var(--green); }
.card-header.bg-info { border-top-color: var(--cyan); }
.card-header.bg-secondary { border-top-color: var(--border-strong); }
.card-header.bg-warning { border-top-color: var(--yellow); }
.card-header.bg-danger { border-top-color: var(--red); }
.card-header.text-white * { color: inherit; }
.text-primary { color: var(--accent) !important; }
.text-success { color: var(--green) !important; }
.text-info { color: var(--cyan) !important; }
.text-warning { color: var(--yellow) !important; }
.text-danger { color: var(--red) !important; }
.table-light { --bs-table-bg: var(--bg-elev); }