/* ============================================================
   BYU Linguistics — Teaching Materials layer
   ADDITIVE ONLY. Load AFTER styles.css.
   Every selector is prefixed .mat- (or is an explicit modifier)
   so nothing here can collide with the mentoring archive styles.
   Palette + type inherited from styles.css tokens.
   ============================================================ */

/* ---- Footer: allow a fourth column when Teaching Materials is listed ---- */
.area-footer-inner.cols-4 {
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
}
@media (max-width: 900px) {
  .area-footer-inner.cols-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .area-footer-inner.cols-4 { grid-template-columns: 1fr; }
}

/* ---- Breadcrumb back-link above a project title ---- */
.mat-crumb {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-medium);
  margin-bottom: 0.75rem;
}
.mat-crumb a { color: var(--text-medium); }
.mat-crumb a:hover { color: var(--byu-royal); }

/* ---- Project cards on the Teaching Materials hub ---- */
.mat-projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0 0;
}
.mat-project {
  display: flex;
  flex-direction: column;
  background: var(--byu-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  border-top: 4px solid var(--byu-navy);
  padding: 1.5rem;
  transition: box-shadow .15s, border-color .15s;
}
.mat-project:hover { box-shadow: var(--shadow-md); border-color: var(--border-strong); }
.mat-project h3 {
  font-size: 1.1875rem;
  font-weight: 640;
  margin: 0 0 0.35rem;
  color: var(--text-navy);
}
.mat-project .mat-project-audience {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-medium);
  margin: 0 0 0.85rem;
}
.mat-project p { font-size: 0.9375rem; color: var(--text-dark); }
.mat-project-foot {
  margin-top: auto;
  padding-top: 1rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--border);
}
.mat-project-count {
  font-size: 0.8125rem;
  color: var(--text-medium);
  font-variant-numeric: tabular-nums;
}

/* ---- In-page contents strip ---- */
.mat-toc {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.125rem 1.25rem;
  margin: 0 0 2.5rem;
}
.mat-toc h2 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-medium);
  margin: 0 0 0.65rem;
}
.mat-toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.5rem;
}
.mat-toc a { font-size: 0.9375rem; font-weight: 500; }

/* ---- A material set (one topic, its related files) ---- */
.mat-set {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 1.75rem;
  scroll-margin-top: calc(var(--topbar-h) + var(--navbar-h) + 1rem);
}
.mat-set-head {
  background: var(--byu-navy);
  color: var(--byu-white);
  padding: 1.125rem 1.5rem;
}
.mat-set-head h3 {
  color: var(--byu-white);
  font-size: 1.1875rem;
  font-weight: 600;
  margin: 0;
}
.mat-set-note {
  margin: 0.4rem 0 0;
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.82);
  max-width: 68ch;
}
.mat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}
.mat-chip {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 3px 8px;
  border-radius: 3px;
  background: rgba(255,255,255,0.14);
  color: var(--byu-white);
  border: 1px solid rgba(255,255,255,0.3);
}

/* ---- File rows inside a set ---- */
.mat-list { margin: 0; padding: 0; list-style: none; }
.mat-item {
  display: grid;
  grid-template-columns: 150px 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  border-top: 1px solid var(--border);
  background: var(--byu-white);
  transition: background .12s;
}
.mat-list > .mat-item:first-child { border-top: none; }
.mat-item:hover { background: var(--bg-tint); }
.mat-item-role {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-medium);
}
.mat-item-name { font-size: 1rem; font-weight: 500; }
.mat-item-name a { color: var(--byu-navy); }
.mat-item-name a:hover { color: var(--byu-royal); }
.mat-item-desc {
  display: block;
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-medium);
  margin-top: 2px;
}
.mat-item-type {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-medium);
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  padding: 2px 6px;
  white-space: nowrap;
}
.mat-item-type[data-type="PDF"]  { color: var(--warning); border-color: var(--warning); }
.mat-item-type[data-type="PPTX"] { color: var(--info);    border-color: var(--info); }

@media (max-width: 700px) {
  .mat-item {
    grid-template-columns: 1fr auto;
    grid-template-areas: "role type" "name name";
    row-gap: 0.35rem;
  }
  .mat-item-role { grid-area: role; }
  .mat-item-type { grid-area: type; justify-self: end; }
  .mat-item-name { grid-area: name; }
}

/* ---- Callout note ---- */
.mat-note {
  border-left: 4px solid var(--byu-royal);
  background: var(--bg-soft);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 0 0 2rem;
  font-size: 0.9375rem;
  color: var(--text-dark);
  max-width: 78ch;
}
.mat-note p:last-child { margin-bottom: 0; }
.mat-note strong { color: var(--text-navy); }

/* ---- Accessibility floor ---- */
a:focus-visible,
.mat-item a:focus-visible {
  outline: 3px solid var(--byu-royal);
  outline-offset: 2px;
  border-radius: 2px;
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}