/* Shell, section rhythm, shared editorial primitives */

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--shell-gutter);
}

.section {
  padding-block: var(--space-section);
  position: relative;
}

/* Rhythm is intentionally uneven: the journal sits tighter against the tours */
.section--tight {
  padding-block-start: clamp(2rem, 1rem + 3vw, 4rem);
}

/* Секция перед закрывающей: её нижний отступ отдан следующей, иначе
   два --space-section складываются в разрыв, а не в паузу. */
.section--flush-end {
  padding-block-end: clamp(1.5rem, 0.5rem + 2vw, 3rem);
}

.section--ink {
  background: var(--color-ink);
  color: var(--color-paper);
}

.section--ink .eyebrow {
  color: var(--color-gold);
}

.section--ink .section-head__rule {
  background: color-mix(in oklch, var(--color-paper) 30%, transparent);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  margin: 0;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-clay-text);
}

.eyebrow::before {
  content: "";
  width: 1.75rem;
  height: 1px;
  background: currentColor;
}

.section-head {
  display: grid;
  gap: var(--space-m);
  grid-template-columns: minmax(0, 1fr);
  align-items: end;
  margin-block-end: var(--space-xl);
}

@media (width >= 62rem) {
  .section-head {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: var(--space-xl);
  }
}

.section-head__title {
  font-size: var(--text-h2);
}

.section-head__title em {
  font-style: italic;
  color: var(--color-pine);
}

.section-head__aside {
  max-width: 40ch;
  color: var(--color-ink-soft);
}

.section--ink .section-head__aside {
  color: color-mix(in oklch, var(--color-paper) 74%, transparent);
}

.section-head__rule {
  grid-column: 1 / -1;
  height: 1px;
  background: var(--rule);
  margin-block-start: var(--space-s);
}

.lead {
  font-size: var(--text-lead);
  line-height: 1.5;
  max-width: var(--measure);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  /* 44px — минимум для пальца. Кнопки в шапке мельче по типографике,
     но зона нажатия у них такая же. */
  min-height: 44px;
  padding: 0.85em 1.6em;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-soft),
    background-color var(--duration-fast) var(--ease-soft),
    color var(--duration-fast) var(--ease-soft),
    border-color var(--duration-fast) var(--ease-soft),
    box-shadow var(--duration-normal) var(--ease-soft);
}

.btn__arrow {
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.btn:hover .btn__arrow,
.btn:focus-visible .btn__arrow {
  transform: translateX(4px);
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--color-pine);
  color: var(--color-paper);
  box-shadow: var(--shadow-soft);
}

.btn--primary:hover {
  background: var(--color-ink);
  box-shadow: var(--shadow-lift);
}

.btn--ghost {
  border-color: var(--rule-strong);
  color: inherit;
}

.btn--ghost:hover {
  border-color: currentColor;
  background: color-mix(in oklch, currentColor 7%, transparent);
}

/* Scroll reveal — only armed once main.js has flagged the document,
   so a JS failure can never leave the page invisible. */
.js .reveal {
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
    transform var(--duration-slow) var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js .reveal {
    opacity: 1;
    transform: none;
  }
}