/* GEODOMAS GLASS BUILDINGS — ARCH LAB envelope section v2
   Presentation layer only. The diagram is explicitly conceptual, not construction documentation. */
.ge-envelope-section {
  position: relative;
  overflow: hidden;
  padding: clamp(76px, 9vw, 132px) 0;
  color: #eef3f2;
  background:
    radial-gradient(circle at 84% 16%, rgba(92, 198, 211, .15), transparent 31rem),
    radial-gradient(circle at 12% 88%, rgba(205, 169, 99, .13), transparent 28rem),
    linear-gradient(145deg, #111817 0%, #0b1111 58%, #070b0c 100%);
}
.ge-envelope-section::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .2;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, transparent, #000 16%, #000 84%, transparent);
}
.ge-envelope-shell {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}
.ge-envelope-head {
  display: grid;
  grid-template-columns: minmax(0, .76fr) minmax(320px, 1.24fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: end;
  margin-bottom: clamp(34px, 5vw, 64px);
}
.ge-envelope-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: #d7b36d;
  font-size: 12px;
  font-weight: 760;
  letter-spacing: .19em;
  text-transform: uppercase;
}
.ge-envelope-kicker::before {
  content: "";
  width: 32px;
  height: 1px;
  background: currentColor;
}
.ge-envelope-title {
  max-width: 13ch;
  margin: 0;
  color: #fff;
  font-size: clamp(36px, 5.5vw, 72px);
  font-weight: 520;
  line-height: .98;
  letter-spacing: -.045em;
  text-wrap: balance;
}
.ge-envelope-lead {
  max-width: 65ch;
  margin: 0;
  color: #b8c6c3;
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.68;
}
.ge-envelope-board {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(221, 235, 232, .16);
  border-radius: 28px;
  background: #0b1011;
  box-shadow: 0 32px 90px rgba(0,0,0,.38);
}
.ge-envelope-board img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
  background: #0b1011;
}
.ge-envelope-board figcaption {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 17px 22px;
  border-top: 1px solid rgba(221, 235, 232, .12);
  color: #8fa19e;
  font-size: 12px;
  line-height: 1.55;
}
.ge-envelope-board figcaption strong {
  flex: 0 0 auto;
  color: #d7b36d;
  font-weight: 760;
  letter-spacing: .11em;
  text-transform: uppercase;
}
.ge-envelope-cards {
  counter-reset: envelope;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.ge-envelope-card {
  min-height: 220px;
  padding: 24px 22px 25px;
  border: 1px solid rgba(221, 235, 232, .13);
  border-radius: 20px;
  background: linear-gradient(155deg, rgba(255,255,255,.065), rgba(255,255,255,.022));
}
.ge-envelope-card__index {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 28px;
  border: 1px solid rgba(215, 179, 109, .62);
  border-radius: 999px;
  color: #e3c483;
  font: 700 12px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .08em;
}
.ge-envelope-card h3 {
  margin: 0 0 10px;
  color: #f7faf9;
  font-size: 17px;
  font-weight: 650;
  line-height: 1.25;
}
.ge-envelope-card p {
  margin: 0;
  color: #9eaeab;
  font-size: 14px;
  line-height: 1.65;
}
.ge-envelope-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  margin-top: 18px;
  padding: 18px 20px;
  border-left: 2px solid #d7b36d;
  background: rgba(215, 179, 109, .07);
  color: #aebbb9;
  font-size: 13px;
  line-height: 1.65;
}
.ge-envelope-note strong {
  color: #ead39f;
  letter-spacing: .08em;
  text-transform: uppercase;
}
@media (max-width: 920px) {
  .ge-envelope-head { grid-template-columns: 1fr; align-items: start; }
  .ge-envelope-title { max-width: 16ch; }
  .ge-envelope-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 580px) {
  .ge-envelope-shell { width: min(100% - 24px, 1180px); }
  .ge-envelope-board { border-radius: 18px; }
  .ge-envelope-board figcaption { display: grid; gap: 8px; padding: 15px 16px; }
  .ge-envelope-cards { grid-template-columns: 1fr; }
  .ge-envelope-card { min-height: 0; }
  .ge-envelope-note { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .ge-envelope-section *, .ge-envelope-section *::before, .ge-envelope-section *::after {
    scroll-behavior: auto !important;
    animation: none !important;
    transition: none !important;
  }
}