/* ==========================================================================
   LAYOUT.CSS — Structural layout, grid, container, header, footer
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-5); }
}

main { display: block; }

.section {
  padding-block: var(--space-8);
}

@media (max-width: 767px) {
  .section { padding-block: var(--space-6); }
}

.section--alt { background: var(--color-surface-alt); }
.section--ink { background: var(--color-ink-fixed); color: #fff; }

.section-head {
  max-width: 680px;
  margin-bottom: var(--space-6);
}
.section-head--center { margin-inline: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary-ink);
  background: var(--color-primary-100);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-2);
}

/* -------------------- Grid utilities -------------------- */
.grid { display: grid; gap: var(--space-3); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }

/* -------------------- Header -------------------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              backdrop-filter var(--dur-base) var(--ease-out),
              height var(--dur-base) var(--ease-out);
}

.site-header.is-scrolled {
  height: 72px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--glass-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.header-nav {
  display: none;
}

@media (min-width: 992px) {
  .header-nav {
    display: flex;
    align-items: center;
    gap: var(--space-4);
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* -------------------- Footer -------------------- */
.site-footer {
  background: var(--color-ink-fixed);
  color: rgba(255,255,255,0.72);
  padding-block: var(--space-8) var(--space-4);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-4);
  font-size: var(--fs-sm);
}

/* -------------------- Mobile bottom bar -------------------- */
.mobile-cta-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 999;
  display: flex;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -8px 24px rgba(10,27,36,0.08);
  padding: var(--space-1) var(--space-2);
  padding-bottom: max(var(--space-1), env(safe-area-inset-bottom));
  gap: var(--space-1);
}

@media (min-width: 992px) {
  .mobile-cta-bar { display: none; }
}

/* -------------------- Page hero (inner pages) -------------------- */
.page-hero {
  padding-top: calc(var(--header-h) + var(--space-6));
  padding-bottom: var(--space-6);
  background: linear-gradient(180deg, var(--color-primary-50), var(--color-bg));
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb a:hover { color: var(--color-primary-ink); }