/* ==========================================================================
   Northern Page — Layout
   ========================================================================== */

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

.container--narrow { max-width: 820px; }
.container--mid { max-width: 980px; }

section {
  padding-block: var(--space-9);
}

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

.section--dark {
  background: var(--bg-dark);
  color: var(--text-on-dark);
}
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 {
  color: var(--text-on-dark);
}
.section--dark p { color: var(--text-on-dark-muted); }

.section--dim { background: var(--paper-dim); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-200);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin-bottom: var(--space-4);
}

.section--dark .eyebrow { color: var(--gold); }

.eyebrow::before {
  content: '';
  width: 22px;
  height: 1.5px;
  background: currentColor;
  display: inline-block;
}

.section-head {
  max-width: 680px;
  margin-bottom: var(--space-8);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

/* Grid helpers */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid--services {
  grid-template-columns: repeat(3, 1fr);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--audience { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1080px) {
  .grid--services { grid-template-columns: repeat(2, 1fr); }
  .grid--audience { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid--services,
  .grid--audience,
  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }
  section { padding-block: var(--space-8); }
}

.stack { display: flex; flex-direction: column; }
.cluster { display: flex; align-items: center; flex-wrap: wrap; }

/* Header */
.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background-color var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), height var(--dur-base) var(--ease-out);
}

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

.site-header.is-scrolled {
  background: rgba(10, 15, 28, 0.58);
  backdrop-filter: saturate(140%) blur(16px);
  -webkit-backdrop-filter: saturate(140%) blur(16px);
  box-shadow: 0 8px 24px -12px rgba(0, 0, 0, 0.45), 0 1px 0 rgba(246, 244, 239, 0.08);
  height: 72px;
}

.page-body--dark-header .site-header {
  color: var(--text-on-dark);
}

/* Footer */
.site-footer {
  background: var(--navy-950);
  color: var(--text-on-dark-muted);
  padding-block: var(--space-8) var(--space-6);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: var(--space-7);
  padding-bottom: var(--space-7);
  border-bottom: 1px solid var(--border-on-dark);
}

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-6); }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-6); }
}

.footer-url {
  display: inline-block;
  margin-top: var(--space-4);
  font-family: var(--font-display);
  font-size: var(--fs-500);
  color: var(--gold);
  letter-spacing: 0.01em;
}
.footer-url:hover { text-decoration: underline; text-underline-offset: 3px; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-5);
  font-size: var(--fs-300);
  flex-wrap: wrap;
  gap: var(--space-3);
}

main { display: block; }