/* =========================
   DESIGN AND CONSTRUCTION — responsive (same pattern as before)
   File: cruising_navigator/3_design_and_construction/design_and_construction.css
========================= */

.design-and-construction{
  --cs-ink:#0f2140;
  --cs-muted:#5f6b7a;
  --cs-border:rgba(15,33,64,.10);

  /* Pattern: fluid spacing + safe gutters */
  --dac-container: 72rem;               /* ~1152px */
  --dac-gutter: clamp(1rem, 4vw, 3rem);
  --dac-py: clamp(2.75rem, 6vw, 5rem);

  position: relative;
  padding-block: var(--dac-py);
  padding-inline: var(--dac-gutter);
  background: #EEF1F6;
  text-align: center;
}

.dac-wrap{
  width: min(100%, var(--dac-container));
  margin-inline: auto;
}

.dac-header{
  width: min(100%, 61.25rem); /* 980px */
  margin-inline: auto;
}

.dac-tagline{
  margin: 0 0 18px 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cs-muted);
}

/* Section title format (as requested, slimmer) */
.dac-title{
  line-height: 1.12;
  text-align: center;
  padding-bottom: clamp(1.25rem, 3vw, 2.25rem);
  font-size: clamp(3rem, 4.5vw, 6rem);
  font-weight: 600;
  max-width: 18ch;
  margin: auto;
  color: #005598;
  text-align: center;
}

.dac-subtitle{
  margin: clamp(1rem, 2.4vw, 1.4rem) auto 0;
  font-size: clamp(1.02rem, 1.8vw, 1.35rem);
  line-height: 1.65;
  color: var(--cs-muted);
  max-width: 78ch;
}

/* GRID */
.dac-grid{
  margin: clamp(2.2rem, 6vw, 4.4rem) auto 0;
  padding: 0;
  list-style: none;

  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2.75rem);
}

.dac-card{
  text-align: center;
  padding: clamp(1.25rem, 2.5vw, 2rem);
}

.dac-icon{
  display: flex;
  justify-content: center;
  margin: 0 auto clamp(.9rem, 2vw, 1.1rem);
}

.dac-cube{
  width: clamp(28px, 3.6vw, 34px);
  height: clamp(28px, 3.6vw, 34px);
  display: block;
}

.dac-card-title{
  margin: 0;

  font-size: clamp(1.15rem, 2vw, 1.55rem);
  font-weight: 800;
  line-height: 1.2;

  /* Remove hard min-width: avoids overflow on small screens */
  max-width: 28ch;
  margin-inline: auto;

  color: #0b0b0b;
}

.dac-card-text{
  margin: clamp(.65rem, 1.6vw, .9rem) auto 0;
  font-size: clamp(1rem, 1.6vw, 1.05rem);
  line-height: 1.65;
  color: var(--cs-muted);
  max-width: 34ch;
}

/* =========================
   Responsive
========================= */

/* Small phones */
@media (max-width: 360px){
  .design-and-construction{
    padding-inline: 1rem;
  }
  .dac-title{
    max-width: 20ch;
  }
}

/* 2 columns on medium screens */
@media (max-width: 1100px){
  .dac-grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(1.25rem, 3vw, 2.1rem);
  }
}

/* 1 column on phones */
@media (max-width: 640px){
  .dac-grid{
    grid-template-columns: 1fr;
  }
  .dac-card-text{
    max-width: 52ch;
  }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce){
  .design-and-construction *{
    transition: none !important;
    animation: none !important;
  }
}

/* =========================
   Reveal only (IntersectionObserver + stagger)
   - Adds only: data-sr-reveal, .sr-item, .is-revealed, delays via --sr-delay
========================= */

[data-sr-reveal] .sr-item{
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 650ms ease,
    transform 650ms cubic-bezier(.2,.8,.2,1);
  transition-delay: var(--sr-delay, 0ms);
  will-change: opacity, transform;
}

[data-sr-reveal] .sr-item.is-revealed{
  opacity: 1;
  transform: translateY(0);
}

/* Ensure content is visible for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce){
  [data-sr-reveal] .sr-item{
    opacity: 1 !important;
    transform: none !important;
  }
}