/* Teaching component */

.teaching-back {
  margin-bottom: 0.6rem;
}

.teaching-back a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}

.teaching-back a:hover {
  color: var(--accent);
}

.teaching-subtitle {
  margin: 0.1rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.teaching-meta-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.4rem;
  margin: 0.9rem 0 0.5rem;
}

.teaching-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.teaching-meta-label {
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.teaching-meta-value {
  font-size: 0.95rem;
  color: var(--text);
  font-weight: 500;
}

.teaching-repo {
  margin: 0.6rem 0 0;
}

.teaching-schedule-heading {
  margin: 1.8rem 0 0.6rem;
  font-size: 1.15rem;
}

.teaching-schedule {
  display: grid;
  gap: 0.6rem;
}

.teaching-lecture-header {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
}

.teaching-lecture-num {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.88rem;
  margin-top: 0.1rem;
}

.teaching-lecture-topic {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
}

.teaching-lecture-desc {
  margin: 0.15rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.teaching-lecture-materials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.55rem;
  padding-left: 3.5rem;
}

.teaching-hero-bottom {
  display: flex;
  justify-content: flex-start;
  margin-top: 0.85rem;
}

.teaching-hero-bottom .teaching-lang-toggle {
  margin: 0;
}

.teaching-course-grid {
  display: grid;
  gap: 1rem;
}

.teaching-index-card {
  overflow: hidden;
  border: 1px solid rgba(219, 226, 234, 0.92);
  border-radius: 15px;
  background: var(--card);
  box-shadow: 0 8px 26px rgba(30, 71, 101, 0.045);
  padding: clamp(1rem, 2.5vw, 1.35rem);
}

.teaching-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.teaching-course-number {
  margin: 0 0 0.22rem;
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.teaching-card-header .teaching-course-title {
  margin: 0;
  color: var(--heading);
  font-family: var(--font-family-sans);
  font-size: clamp(1.25rem, 2.6vw, 1.55rem);
  line-height: 1.3;
}

.teaching-term-badge {
  flex: none;
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  color: var(--accent);
  padding: 0.22rem 0.62rem;
  font-size: 0.74rem;
  font-weight: 750;
}

.teaching-index-card .teaching-course-overview {
  margin: 0.72rem 0 0;
  max-width: 900px;
  color: var(--muted);
  line-height: 1.65;
}

.teaching-card-meta {
  display: grid;
  grid-template-columns: 0.65fr 1fr 1.35fr;
  gap: 0.7rem;
  margin-top: 0.9rem;
}

.teaching-card-meta > span {
  display: grid;
  align-content: start;
  min-width: 0;
  border: 1px solid rgba(219, 226, 234, 0.9);
  border-radius: 9px;
  background: var(--surface-subtle);
  padding: 0.58rem 0.68rem;
  color: #475569;
  font-size: 0.79rem;
  line-height: 1.42;
}

.teaching-card-meta strong {
  margin-bottom: 0.12rem;
  color: var(--muted);
  font-size: 0.64rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.teaching-syllabus {
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
}

.teaching-syllabus h3 {
  margin: 0 0 0.58rem;
  color: var(--heading);
  font-size: 0.92rem;
}

.teaching-syllabus .teaching-topic-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.teaching-syllabus .teaching-topic-list li {
  display: grid;
  grid-template-columns: 1.75rem minmax(0, 1fr) auto;
  gap: 0.65rem;
  align-items: center;
  min-height: 2.45rem;
  border-top: 1px solid #edf1f5;
  padding: 0.42rem 0;
}

.teaching-syllabus .teaching-topic-list li:first-child {
  border-top: 0;
}

.teaching-topic-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.72rem;
  height: 1.72rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 800;
}

.teaching-topic-name {
  color: var(--text-soft);
  font-size: 0.86rem;
  line-height: 1.42;
}

.teaching-syllabus .teaching-topic-link {
  margin-left: 0;
}

.teaching-card-footer {
  margin-top: 0.85rem;
  text-align: right;
}

.teaching-card-footer a {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
}

.teaching-card-footer a:hover {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.teaching-course-card {
  padding: 1.2rem 1.3rem;
}

.teaching-course-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.teaching-course-title:hover {
  color: var(--accent);
}

.teaching-course-subtitle {
  margin: 0.1rem 0 0.5rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.teaching-course-overview {
  margin: 0 0 0.7rem;
  color: #4b5563;
  font-size: 0.94rem;
  line-height: 1.58;
}

.teaching-course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.teaching-meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  color: var(--muted);
  border: none;
  border-radius: 8px;
  background: #f3f4f6;
  padding: 0.2rem 0.55rem;
}

.teaching-course-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.teaching-table-card {
  padding: 0.9rem 1rem;
}

.teaching-table-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: 10px;
}

.teaching-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

.teaching-table th,
.teaching-table td {
  border-bottom: 1px solid var(--line);
  padding: 0.75rem 0.7rem;
  vertical-align: top;
  text-align: left;
}

.teaching-table thead th {
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--surface-subtle);
}

.teaching-table .teaching-course-overview {
  margin: 0 0 0.45rem;
}

.teaching-topic-list {
  margin: 0;
  padding-left: 1rem;
  display: grid;
  gap: 0.2rem;
  color: var(--text-soft);
  font-size: 0.88rem;
}

.teaching-topic-link {
  display: inline-flex;
  align-items: center;
  margin-left: 0.38rem;
  padding: 0.04rem 0.4rem;
  border-radius: var(--radius-pill);
  background: #eff6ff;
  color: #1d4ed8;
  text-decoration: none;
  font-size: 0.74rem;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid var(--border-interactive);
}

.teaching-topic-link:hover {
  background: #dbeafe;
  color: #1e3a8a;
}

.teaching-schedule-lines {
  display: grid;
  gap: 0.2rem;
  color: var(--text-soft);
  font-size: 0.9rem;
}

.teaching-table td .teaching-course-actions {
  min-width: 150px;
}

.teaching-lang-toggle {
  display: flex;
  gap: 0.45rem;
  margin: 0 0 0.5rem;
}

.teaching-lang-btn {
  min-width: 3rem;
}

.teaching-lang-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

#teaching-page .teaching-lang-ru {
  display: none;
}

#teaching-page[data-teaching-lang="ru"] .teaching-lang-en {
  display: none;
}

#teaching-page[data-teaching-lang="ru"] .teaching-lang-ru {
  display: inline;
}

@media (max-width: 640px) {
.teaching-meta-grid {
    flex-direction: column;
    gap: 0.4rem;
  }

.teaching-card-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.55rem;
  }

.teaching-card-meta {
    grid-template-columns: 1fr;
    gap: 0.45rem;
  }

.teaching-syllabus .teaching-topic-list li {
    grid-template-columns: 1.75rem minmax(0, 1fr) auto;
    gap: 0.5rem;
  }

.teaching-lecture-header {
    flex-direction: column;
    gap: 0.35rem;
  }

.teaching-lecture-materials {
    padding-left: 0;
  }

.teaching-table-card {
    padding: 0.6rem 0.7rem;
  }

.teaching-table {
    min-width: 0;
  }

.teaching-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

.teaching-table,
  .teaching-table tbody,
  .teaching-table tr,
  .teaching-table td {
    display: block;
    width: 100%;
  }

.teaching-table tr {
    padding: 0.75rem;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--card);
  }

.teaching-table tr + tr {
    margin-top: 0.75rem;
  }

.teaching-table td {
    border: 0;
    padding: 0;
  }

.teaching-table td + td {
    margin-top: 0.65rem;
    padding-top: 0.65rem;
    border-top: 1px solid var(--line);
  }

}