/* ==========================================================================
   Mobisat — Layout primitives
   ========================================================================== */

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

.section { padding-block: clamp(3rem, 7vw, 6rem); }
.section--tight { padding-block: clamp(2rem, 4vw, 3.5rem); }
.section--navy { background: var(--surface-navy); color: var(--on-navy); }
.section--navy h1, .section--navy h2, .section--navy h3, .section--navy h4,
.section--grid h1, .section--grid h2, .section--grid h3, .section--grid h4 { color: #fff; }
.section--soft { background: var(--surface-soft); }
.section--blue { background: var(--surface-blue); }

/* subtle topology grid used on navy sections */
.section--grid {
  position: relative;
  color: var(--on-navy);
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(13, 76, 158, 0.55), transparent 60%),
    var(--surface-navy);
}
.section--grid::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.8), transparent);
  pointer-events: none;
}
.section--grid > * { position: relative; }

.stack > * + * { margin-block-start: var(--flow, 1rem); }

.grid { display: grid; gap: var(--grid-gap, 1.5rem); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr)); }

.cluster { display: flex; flex-wrap: wrap; gap: var(--cluster-gap, 0.75rem); align-items: center; }

.split {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}
@media (min-width: 900px) {
  .split { grid-template-columns: 1.05fr 0.95fr; }
  .split--reverse > :first-child { order: 2; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: var(--fs-300);
  font-weight: var(--fw-bold);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--brand-blue);
}
.section--navy .eyebrow, .section--grid .eyebrow { color: #8fbdec; }
.eyebrow::before {
  content: "";
  width: 26px; height: 2px;
  background: var(--brand-red);
  border-radius: 2px;
}

.section-head { max-width: 62ch; margin-block-end: clamp(1.5rem, 4vw, 3rem); }
.section-head p { color: var(--muted); font-size: var(--fs-500); margin-block-start: 0.75rem; }
.section--navy .section-head p, .section--grid .section-head p { color: var(--muted-on-dark); }
.section-head--center { margin-inline: auto; text-align: center; }

.lede { font-size: var(--fs-500); color: var(--ink-soft); }
.section--navy .lede, .section--grid .lede { color: var(--on-navy); }

/* Safe-area helpers for mobile app shell */
.safe-bottom { padding-bottom: env(safe-area-inset-bottom, 0); }