/* =======================================================================
   LAYOUT
   Page-level structure and responsive behaviour that isn't owned by a
   single component.
   ======================================================================= */

.site-main { display: block; }

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

/* Sections without an explicit surface class sit on the plain white
   body background; .section--surface is used explicitly where a
   change of tone is wanted, instead of an automatic odd/even rule. */

/* Two-column layout (used by Mission / About CEFR sections) */
.split {
  display: grid;
  gap: var(--space-2xl);
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
}
@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; gap: var(--space-lg); }
}
.split--reverse { direction: rtl; }
.split--reverse > * { direction: ltr; }

.figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 2px solid var(--color-red);
  box-shadow: var(--shadow-md);
  position: relative;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
}
.figure img { width: 100%; height: auto; max-height: 480px; object-fit: contain; display: block; margin: 0 auto; }
.figure figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: var(--space-sm) var(--space-md);
  background: linear-gradient(0deg, rgba(16,27,48,0.85), transparent);
  color: var(--parchment-100);
  font-size: var(--step--1);
}

/* CEFR ladder (visual list of levels with connecting rule) */
.ladder { position: relative; display: flex; flex-direction: column; gap: var(--space-md); }
.ladder::before {
  content: "";
  position: absolute;
  left: 27px; top: 8px; bottom: 8px;
  width: 1px;
  background: var(--color-border-strong);
  opacity: 0.5;
}
.ladder__rung { position: relative; display: flex; gap: var(--space-md); align-items: flex-start; padding-left: 0; }
.ladder__code {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--color-surface-raised);
  border: 2px solid var(--color-border-strong);
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: var(--step-0);
  display: flex; align-items: center; justify-content: center;
}
.ladder__code--compact { font-size: var(--step--1); letter-spacing: -0.03em; }
.ladder__body h3 { font-size: var(--step-0); }
.ladder__body p { color: var(--color-text-muted); font-size: var(--step--1); }
.ladder__link { display: inline-flex; align-items: center; gap: 0.4em; margin-top: 0.5em; font-weight: 700; font-size: var(--step--1); color: var(--color-accent); }
.ladder__link svg { width: 15px; height: 15px; }
.ladder__link:hover { text-decoration: underline; }

/* Level page: section tabs / anchored jump list */
.level-toc {
  position: sticky;
  top: calc(var(--header-height) + 1px);
  z-index: 500;
  background: var(--color-surface);
  border-bottom: var(--border-hairline);
}
.level-toc__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  gap: var(--space-sm);
  overflow-x: auto;
  scrollbar-width: thin;
}
.level-toc a {
  flex-shrink: 0;
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--color-text-muted);
  padding: 0.4em 0.9em;
  border-radius: 999px;
  border: 1px solid transparent;
  white-space: nowrap;
}
.level-toc a:hover, .level-toc a:focus-visible { color: var(--color-primary); border-color: var(--color-border); }
.level-toc a.is-active { color: var(--color-text-on-dark); background: var(--color-primary); border-color: var(--color-primary); }

/* Responsive images used as section headers on level/hub pages */
.section-banner {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 460px;
  object-fit: contain;
  object-position: center;
  margin: 0 auto var(--space-lg);
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-red);
  box-shadow: var(--shadow-sm);
  background: var(--color-surface);
}
@media (max-width: 640px) {
  .section-banner { max-height: 320px; }
}

@media (max-width: 640px) {
  .section { padding: var(--space-xl) var(--space-sm); }
  .hero__inner { padding: var(--space-xl) var(--space-sm); }
  h1 { font-size: var(--step-4); }
}

.print-hidden { }
@media print {
  .site-header, .back-to-top, .theme-toggle, .nav-toggle, .site-footer { display: none; }
}