/* =========================================================
   Layout: frame, sections, grids, hero, split columns
   ========================================================= */

.frame {
  width: min(100% - 2 * var(--gutter), var(--container));
  margin-inline: auto;
}

.page-main { padding-top: calc(var(--header-h) + 2 * var(--header-gap)); }

/* Sections: the gap between two sections is one section padding (64px / 48px mobile). */
.section { padding-block: var(--space-8); }
.section + .section,
.page-hero + .section { padding-top: 0; }
.section.section--alt { padding-top: var(--space-8); background: var(--surface-2); }
.section--alt + .section { padding-top: var(--space-8); }

.section__head {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 760px;
  margin-bottom: var(--space-6);
}
.section__title { font-size: var(--fs-xl); }
.section__lead {
  max-width: 60ch;
  color: var(--text-muted);
  font-size: var(--fs-md);
}
.section__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

/* Grids */
/* Cards sit straight on the section background; the gap is the only separator.
   Columns drop to fewer as space runs out but never exceed the grid's column count;
   auto-fill keeps short rows (e.g. a single card) at normal card width. */
.grid {
  --grid-gap: var(--space-5);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--grid-gap);
}
.grid--2 { grid-template-columns: repeat(auto-fill, minmax(min(100%, max(320px, (100% - var(--grid-gap)) / 2)), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fill, minmax(min(100%, max(280px, (100% - 2 * var(--grid-gap)) / 3)), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fill, minmax(min(100%, max(220px, (100% - 3 * var(--grid-gap)) / 4)), 1fr)); }
@media (max-width: 640px) {
  .grid { --grid-gap: var(--space-4); }
}

/* A card that follows a grid keeps the grid gap */
.grid + .card { margin-top: var(--space-5); }
@media (max-width: 640px) {
  .grid + .card { margin-top: var(--space-4); }
}

/* Two-column layout (contact, join). Stacks on tablets. */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: var(--space-5);
  align-items: start;
}
@media (max-width: 900px) {
  .split { grid-template-columns: minmax(0, 1fr); }
}

/* Small flow helpers */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

/* Page hero */
.page-hero { padding-block: var(--space-7) var(--space-8); }
.page-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  align-items: center;
}
.page-hero--media .page-hero__inner {
  grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  gap: var(--space-7);
}
.page-hero__body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
}
.page-hero__title {
  font-size: var(--fs-2xl);
  letter-spacing: -0.02em;
}
.page-hero__lead {
  max-width: 60ch;
  color: var(--text-muted);
  font-size: var(--fs-md);
}
.page-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-2);
}
.page-hero__art {
  width: 100%;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background-color: var(--surface-2);
  background-image: var(--hero-img, none);
  background-position: var(--hero-pos, center);
  background-repeat: no-repeat;
  background-size: cover;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 900px) {
  .page-hero--media .page-hero__inner { grid-template-columns: minmax(0, 1fr); }
  .page-hero__art {
    aspect-ratio: 16 / 9;
    max-height: 280px;
  }
}
@media (max-width: 640px) {
  .section { padding-block: var(--space-7); }
  .section + .section,
  .page-hero + .section { padding-top: 0; }
  .section.section--alt,
  .section--alt + .section { padding-block: var(--space-7); }
  .page-hero { padding-block: var(--space-5) var(--space-7); }
  /* On phones the text and buttons own the first screen */
  .page-hero__art { display: none; }
}