/* Física — cursos propedéuticos */

.fisica-hub {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.fisica-viz-section {
  margin-bottom: 48px;
  padding: 28px;
  background: linear-gradient(145deg, rgba(30, 32, 36, 0.95), rgba(35, 39, 43, 0.95));
  border: 1px solid var(--section-border);
  border-radius: 16px;
}

.fisica-section-head {
  margin-bottom: 24px;
  text-align: center;
}

.fisica-section-head--row {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: space-between;
  align-items: flex-end;
  text-align: left;
}

.fisica-section-title {
  margin: 0 0 8px;
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.fisica-section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 4px;
  margin: 12px auto 0;
  background: linear-gradient(90deg, var(--hero-primary), var(--hero-accent));
  border-radius: 2px;
}

.fisica-section-head--row .fisica-section-title::after {
  margin-left: 0;
  margin-right: auto;
}

.fisica-section-hint {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--hero-accent);
  font-weight: 600;
}

.fisica-section-head--row .fisica-section-hint {
  margin-top: 4px;
}

.fisica-section-desc {
  margin: 0;
  font-size: 14px;
  color: var(--section-muted);
  line-height: 1.55;
}

.fisica-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  justify-content: center;
}

.fisica-chip {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--section-border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--section-muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.25s ease;
}

.fisica-chip:hover {
  border-color: var(--chip-color, var(--hero-primary));
  color: #fff;
}

.fisica-chip.active {
  background: rgba(245, 158, 11, 0.2);
  border-color: var(--chip-color, var(--hero-primary));
  color: #fff;
}

.fisica-courses-map {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.fisica-course-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  padding: 22px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(20, 22, 28, 0.85);
  cursor: pointer;
  font-family: inherit;
  color: inherit;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.fisica-course-card:hover,
.fisica-course-card.active {
  transform: translateY(-2px);
  border-color: var(--course-color, var(--hero-primary));
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.fisica-course-card__icon {
  font-size: 1.75rem;
  margin-bottom: 10px;
  line-height: 1;
}

.fisica-course-card__count {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--course-color, var(--hero-primary));
  margin-bottom: 6px;
}

.fisica-course-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.fisica-course-card__desc {
  font-size: 13px;
  color: var(--section-muted);
  line-height: 1.45;
  margin: 0;
}

.catalog-search-wrap {
  flex: 1;
  min-width: min(100%, 320px);
}

.catalog-search {
  width: 100%;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid var(--section-border);
  background: rgba(255, 255, 255, 0.04);
  color: #fff;
  font-size: 14px;
  outline: none;
  font-family: inherit;
}

.catalog-search:focus {
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12);
}

.catalog-search::placeholder {
  color: #6b7280;
}

.fisica-catalog-stats {
  margin: 0;
  font-size: 13px;
  color: var(--section-muted);
}

.fisica-course-block {
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--section-border);
}

.fisica-course-block:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.fisica-course-block__head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

.fisica-course-block__icon {
  font-size: 1.5rem;
}

.fisica-course-block__title {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 800;
  color: #fff;
}

.fisica-course-block__badge {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.08);
  color: var(--course-color);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.fisica-course-note {
  margin: 0 0 16px;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 13px;
  color: var(--section-muted);
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--course-color, var(--hero-primary));
  line-height: 1.55;
}

.fisica-units {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.fisica-unit {
  border-radius: 12px;
  border: 1px solid var(--section-border);
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden;
}

.fisica-unit__summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  color: #fff;
  font-size: 14px;
  user-select: none;
  background: rgba(255, 255, 255, 0.03);
}

.fisica-unit__summary::-webkit-details-marker {
  display: none;
}

.fisica-unit__summary::before {
  content: '▸';
  color: var(--course-color, var(--hero-accent));
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.fisica-unit[open] .fisica-unit__summary::before {
  transform: rotate(90deg);
}

.fisica-unit__num {
  font-size: 12px;
  font-weight: 700;
  color: var(--course-color, var(--hero-primary));
  min-width: 1.5rem;
}

.fisica-unit__optional {
  margin-left: auto;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--section-muted);
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
}

.fisica-unit__topics {
  margin: 0;
  padding: 0 18px 14px 2.5rem;
  list-style: none;
}

.fisica-unit__topics li {
  position: relative;
  padding: 6px 0 6px 14px;
  font-size: 13px;
  color: var(--section-muted);
  line-height: 1.45;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.fisica-unit__topics li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--course-color, var(--hero-accent));
  transform: translateY(-50%);
  opacity: 0.7;
}

.fisica-unit__topics li.optional {
  opacity: 0.75;
}

.fisica-topic-item {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.fisica-topic-link {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
  padding: 10px 0;
  text-decoration: none;
  color: inherit;
  transition: color 0.2s ease;
}

.fisica-topic-link:hover {
  color: #fff;
}

.fisica-topic-link:hover .fisica-topic-link__lab {
  color: var(--hero-accent);
}

.fisica-topic-link__text {
  font-size: 13px;
  color: #d1d5db;
  line-height: 1.45;
  flex: 1;
  min-width: 180px;
}

.fisica-topic-link:hover .fisica-topic-link__text {
  color: #fff;
}

.fisica-topic-link__lab {
  font-size: 11px;
  font-weight: 700;
  color: var(--hero-accent);
  white-space: nowrap;
}

.fisica-unit__topics li::before {
  display: none;
}

.fisica-biblio {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--section-border);
}

.fisica-biblio h4 {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--section-muted);
}

.fisica-biblio ul {
  margin: 0;
  padding-left: 1.1rem;
}

.fisica-biblio li {
  font-size: 12px;
  color: var(--section-muted);
  line-height: 1.5;
  margin-bottom: 6px;
}

.fisica-catalog-empty {
  text-align: center;
  padding: 32px;
  color: var(--section-muted);
  font-size: 14px;
}

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

@media (max-width: 640px) {
  .fisica-viz-section {
    padding: 20px 16px;
  }

  .fisica-section-head--row {
    flex-direction: column;
    align-items: stretch;
  }
}