/* =========================================================================
   layout.css — containers, sections, grids, surfaces
   Load after base.css
   ========================================================================= */

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

/* Section rhythm */
.section { padding-block: var(--section-y); position: relative; }
.section--tight { padding-block: calc(var(--section-y) * 0.62); }

/* ---- Surface themes (paint + text color context) ------------------ */
.surface-linen { background: var(--linen); color: var(--ink); }
.surface-linen-050 { background: var(--linen-050); color: var(--ink); }

.surface-forest {
  background: var(--forest);
  color: var(--cream);
  background-image: var(--weave-dark);
}
.surface-forest h1, .surface-forest h2,
.surface-forest h3, .surface-forest h4 { color: var(--cream); }

.surface-forest-deep {
  background:
    radial-gradient(120% 90% at 82% -10%, var(--forest-700) 0%, transparent 55%),
    linear-gradient(180deg, var(--forest) 0%, var(--forest-900) 100%);
  color: var(--cream);
  background-blend-mode: normal;
}
.surface-forest-deep h1, .surface-forest-deep h2,
.surface-forest-deep h3 { color: var(--cream); }

/* on-dark helper toggles token context so components restyle for forest */
.on-dark {
  --fg: var(--cream);
  --fg-muted: var(--cream-dim);
  --hairline: var(--line-on-dark);
  --bg-raised: var(--forest-700);
}

/* ---- Section header block ----------------------------------------- */
.section-head {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 44rem;
}
.section-head--between {
  max-width: none;
}
@media (min-width: 900px) {
  .section-head--between {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-6);
  }
  .section-head--between .section-head__lead { max-width: 40rem; }
}
.section-head h2 { max-width: 22ch; }
.section-head__intro {
  font-size: var(--text-lg);
  color: var(--fg-muted);
  max-width: 52ch;
}

/* ---- Grids -------------------------------------------------------- */
.grid { display: grid; gap: var(--space-5); }

.grid-products {
  display: grid;
  gap: 0;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--hairline);
}
@media (min-width: 600px) { .grid-products { grid-template-columns: 1fr 1fr; } }
@media (min-width: 960px) { .grid-products { grid-template-columns: 1fr 1fr 1fr; } }

.grid-features {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .grid-features { grid-template-columns: 1fr 1fr; } }
@media (min-width: 980px) { .grid-features { grid-template-columns: 1fr 1fr 1fr; } }

.grid-steps {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
  counter-reset: step;
}
@media (min-width: 720px) { .grid-steps { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1040px) { .grid-steps { grid-template-columns: repeat(5, 1fr); gap: var(--space-4); } }

/* ---- Hero layout -------------------------------------------------- */
.hero {
  position: relative;
  min-height: min(92svh, 900px);
  display: flex;
  align-items: center;
  padding-block: clamp(6rem, 5rem + 8vw, 10rem) var(--section-y);
  overflow: hidden;
}
.hero__inner {
  display: grid;
  gap: clamp(2rem, 1rem + 4vw, 4.5rem);
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
  width: 100%;
}
@media (min-width: 940px) {
  .hero__inner { grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.9fr); }
}

/* ---- Contact split ------------------------------------------------ */
.contact-grid {
  display: grid;
  gap: clamp(2rem, 1rem + 4vw, 4rem);
  grid-template-columns: 1fr;
}
@media (min-width: 920px) {
  .contact-grid { grid-template-columns: 0.85fr 1.15fr; align-items: start; }
}

/* ---- Footer layout ------------------------------------------------ */
.footer-grid {
  display: grid;
  gap: var(--space-7) var(--space-6);
  grid-template-columns: 1fr;
}
@media (min-width: 680px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }

/* Reveal-on-scroll base state (JS adds .is-in) */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}