/* ==========================================================================
   Layout — containers, sections, grids
   Structure comes from tonal bands and generous space, with photographs
   doing the work.
   ========================================================================== */

.wrap {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-5);
}

@media (min-width: 60rem) {
  .wrap { padding-inline: var(--sp-7); }
}

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

.section--tight { padding-block: var(--sp-7); }

.section--loose { padding-block: var(--sp-9); }

/* Tonal bands */
.band-mist { background: var(--mist); }

.band-black {
  background: var(--black);
  color: var(--text-on-dark);
}

.band-night {
  background: var(--night-sea);
  color: var(--text-on-dark);
}

.band-ngahere {
  background: var(--ngahere);
  color: var(--text-on-dark);
}

.band-rule { background: var(--white); }

/* The brand mark, oversized and faint, bleeding off the right edge. Same move
   as the ghost mark behind the app's sign-in screen. */
.band-ghost {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.band-ghost::after {
  content: '';
  position: absolute;
  z-index: -1;
  top: 50%;
  right: -3rem;
  width: clamp(16rem, 34vw, 30rem);
  aspect-ratio: 375 / 649;
  background: url('../img/mark-white.svg') center / contain no-repeat;
  opacity: 0.09;
  transform: translateY(-50%);
  pointer-events: none;
}

/* --- Section header ------------------------------------------------------
   Left-aligned by default.                                                 */

.section-head {
  display: grid;
  gap: var(--sp-4);
  margin-bottom: var(--sp-7);
}

.section-head h2 { max-width: 22ch; }

.section-head p { max-width: var(--measure); }

@media (min-width: 60rem) {
  .section-head--split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--sp-7);
    align-items: end;
  }

  .section-head--split .eyebrow { grid-column: 1 / -1; }
}

/* --- Asymmetric two-column ------------------------------------------------ */

.split {
  display: grid;
  gap: var(--sp-7);
}

@media (min-width: 62rem) {
  .split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: var(--sp-8);
    align-items: center;
  }

  .split--wide-left { grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr); }

  .split--wide-right { grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.25fr); }

  .split--top { align-items: start; }
}

/* --- Rail: numbered sequence ---------------------------------------------
   Items are a genuine sequence, so they're numbered honestly and separated
   by rules rather than boxed into cards.                                   */

.rail {
  display: grid;
  gap: 0;
  list-style: none;
}

.rail > li {
  padding-block: var(--sp-6);
  border-top: 2px solid var(--black);
}

@media (min-width: 56rem) {
  .rail {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--sp-6);
  }

  .rail > li { padding: var(--sp-5) 0 0; }
}

.band-black .rail > li,
.band-night .rail > li,
.band-ngahere .rail > li { border-top-color: var(--text-on-dark); }

/* --- Utility -------------------------------------------------------------- */

.stack { display: grid; align-content: start; }

.stack--2 { gap: var(--sp-2); }
.stack--3 { gap: var(--sp-3); }
.stack--4 { gap: var(--sp-4); }
.stack--5 { gap: var(--sp-5); }
.stack--6 { gap: var(--sp-6); }

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-4);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}