/* === Секции и макет === */

/* Между секциями — один зазор (padding-top), не удвоение сверху+снизу */
.section {
  padding-top: var(--space-section-gap);
  padding-bottom: 0;
}

main > .section:last-child {
  padding-bottom: var(--space-section-gap);
}

.section--tight {
  padding-top: var(--space-section-tight);
}

.section--compact {
  padding-top: var(--space-section-compact);
}

.section--roomy {
  padding-top: var(--space-section-roomy);
}

.section--flush {
  padding-top: 0;
}

.section--pad-b-default {
  padding-bottom: var(--space-section-gap);
}

.section--pad-b-tight {
  padding-bottom: var(--space-section-tight);
}

.section--pad-b-compact {
  padding-bottom: var(--space-section-compact);
}

.section--pad-b-roomy {
  padding-bottom: var(--space-section-roomy);
}

.section--pad-b-flush {
  padding-bottom: 0;
}

main > .section--flush:last-child {
  padding-bottom: 0;
}

.section--muted {
  background: var(--bg-elevated);
}

/* === Сворачиваемые секции (sectionLayout.collapsible, <details>) === */
.section--collapsible details.section-collapse > summary.section-collapse__trigger {
  list-style: none;
}

.section--collapsible details.section-collapse > summary.section-collapse__trigger::-webkit-details-marker {
  display: none;
}

.section--collapsible .section-collapse__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 0 0 0.35rem;
  padding: 0.15rem 0 0.65rem;
  font: inherit;
  text-align: left;
  color: inherit;
  background: none;
  border: none;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.section--collapsible .section-collapse__trigger:hover {
  color: var(--accent);
  border-bottom-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.section--collapsible .section-collapse__trigger:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.section--collapsible .section-collapse__title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.5vw, 2rem);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.15;
}

.section--collapsible .section-collapse__chevron {
  flex-shrink: 0;
  width: 0.45em;
  height: 0.45em;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  opacity: 0.75;
  transition: transform 0.28s cubic-bezier(0.33, 1, 0.68, 1), opacity 0.2s ease;
}

.section--collapsible details.section-collapse[open] .section-collapse__chevron {
  transform: rotate(-135deg);
  margin-top: 0.2em;
  opacity: 1;
}

/* display:grid на детях <details> ломает нативное скрытие — панель остаётся видимой */
.section--collapsible details.section-collapse:not([open]) .section-collapse__panel {
  display: none;
}

.section--collapsible details.section-collapse[open] .section-collapse__panel {
  display: block;
}

.section--collapsible details.section-collapse[open] .section-collapse__panel-inner {
  animation: section-collapse-in 0.34s cubic-bezier(0.33, 1, 0.68, 1);
}

@keyframes section-collapse-in {
  from {
    opacity: 0;
    transform: translateY(-0.35rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section--collapsible.section--collapse-instant details.section-collapse[open] .section-collapse__panel-inner {
  animation: none;
}

.section--collapsible.section--collapse-instant .section-collapse__chevron {
  transition: none;
}

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

.section__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 0 0 1rem;
}

.section__title-row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.section__title-row .section__title--inline {
  margin: 0;
}

.section__title-icon {
  font-size: clamp(1.35rem, 3.5vw, 1.85rem);
  color: var(--accent);
  line-height: 1;
}

.what-i-teach__card .what-i-teach__body.rich-content > p:first-child {
  margin-top: 0;
}

.what-i-teach__card .what-i-teach__body.rich-content > *:last-child {
  margin-bottom: 0;
}

.section__subtitle {
  color: var(--text-muted);
  margin: 0 0 2.5rem;
  max-width: 40rem;
  font-size: 1.05rem;
}

.section__micro-cta {
  margin-top: 2rem;
  text-align: center;
}

/* Подвал */
.site-footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: flex-start;
}

@media (min-width: 768px) {
  .site-footer__inner {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
  }
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.site-footer__links a.site-footer__nav-link,
.site-footer__links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-footer__links a .site-nav-icon {
  font-size: 0.9em;
  line-height: 1;
  flex-shrink: 0;
  color: inherit;
  opacity: 0.9;
}

.site-footer__links a:hover {
  color: var(--accent);
}

.site-footer__links a:hover .site-nav-icon {
  opacity: 1;
}

.site-footer__brand {
  /* Дополнительные стили при необходимости */
}

.site-footer__tag {
  color: var(--text-muted);
  margin: 0;
}

.site-footer__legal {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}

.site-footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-top: 0.5rem;
}

.site-footer__legal-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.site-footer__legal-links a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.site-footer__legal {
  width: 100%;
}

@media (min-width: 768px) {
  .site-footer__legal {
    width: auto;
  }
}