/* =============================================================================
   AdStar landing — layout.css
   Shared layout primitives: container, section rhythm, buttons, reveal.
   ========================================================================== */

/* Smooth-scroll wrappers required by GSAP ScrollSmoother */
#smooth-wrapper { /* fixed viewport that holds the moving content */ }
#smooth-content { will-change: transform; }

/* Centered content column (desktop max 1200px) */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
@media (max-width: 767px) {
  .container { padding-inline: var(--gutter-mobile); }
}

/* A page section. Full-bleed background, inner content constrained by .container. */
.section {
  position: relative;
  width: 100%;
  padding-block: 100px;
  scroll-margin-top: 88px; /* keep titles clear of the sticky nav on anchor jumps */
}
@media (max-width: 1024px) { .section { padding-block: 80px; } }
@media (max-width: 767px)  { .section { padding-block: 56px; } }

/* Section heading block (centered title + optional subtitle) */
.section-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
  margin-inline: auto;
}
.section-head__title {
  font-size: var(--fs-display-lg);
  line-height: var(--lh-display-lg);
  font-weight: 700;
  letter-spacing: var(--tracking-display);
  color: var(--text-primary);
}
.section-head__subtitle {
  font-size: var(--fs-sm);
  line-height: var(--lh-sm);
  color: var(--text-secondary);
  max-width: 620px;
}
@media (max-width: 767px) {
  .section-head__title { font-size: 32px; line-height: 40px; }
}

/* ---- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding-inline: 20px;
  border-radius: var(--radius-sm);
  font-size: var(--fs-md);
  font-weight: 600;
  white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease-out),
              background-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
}
.btn:active { transform: translateY(1px) scale(0.99); }

.btn--primary {
  background: var(--brand-600);
  color: var(--black);
}
.btn--primary:hover {
  background: var(--brand-500);
  box-shadow: 0 0 0 4px rgba(218, 251, 9, 0.18), 0 8px 24px rgba(218, 251, 9, 0.12);
}
.btn--primary .btn__icon { width: 18px; height: 18px; }

.btn--ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}
.btn--ghost:hover { background: var(--gray-900); }

/* ---- Scroll-reveal (GSAP toggles .is-in; CSS provides graceful fallback) - */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: none; }

/* When JS/GSAP is unavailable, never hide content */
.no-js .reveal { opacity: 1; transform: none; }

/* Visually-hidden (a11y) */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* Brand glow helper used by several sections */
.brand-glow { color: var(--brand-600); }