/* ============================================================
   PLATFORM — five modules, dark sections, the system in detail
   ============================================================ */
.platform {
  background: var(--prussian-deep);
  color: var(--parchment);
  padding: 96px 48px;
  position: relative;
  overflow: hidden;
}
.platform::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 80% 20%, rgba(28, 58, 95, 0.55) 0%, transparent 50%),
              radial-gradient(ellipse at 10% 80%, rgba(184, 150, 58, 0.05) 0%, transparent 50%);
  pointer-events: none;
}
.platform-inner {
  max-width: 1320px;
  margin: 0 auto;
  position: relative;
}
.platform .section-head { border-color: rgba(184, 150, 58, 0.18); }
.platform .section-head::after { background: var(--antique-gold); }
.platform .section-numeral { color: var(--burnished-gold); }
.platform .section-label { color: rgba(250, 247, 242, 0.55); }

.platform-headline {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(28px, 3.8vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--parchment);
  margin-bottom: 20px;
  max-width: 900px;
}
.platform-headline em {
  font-style: italic;
  color: var(--burnished-gold);
}
.platform-sub {
  font-size: 15px;
  line-height: 1.65;
  color: rgba(250, 247, 242, 0.72);
  max-width: 560px;
  margin-bottom: 56px;
}

.modules-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 1px;
  background: rgba(184, 150, 58, 0.15);
  border: 1px solid rgba(184, 150, 58, 0.15);
}
.module-card {
  background: var(--prussian-deep);
  padding: 32px 28px;
  position: relative;
  transition: background 0.5s;
  min-height: 240px;
  display: flex;
  flex-direction: column;
}
.module-card:hover { background: #0c1f3d; }
.module-card.large { grid-row: span 2; min-height: 480px; padding: 40px 36px; }

.mod-tag {
  font-family: var(--body);
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--burnished-gold);
  margin-bottom: 16px;
}
.mod-name {
  font-family: var(--display);
  font-weight: 300;
  font-size: 28px;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--parchment);
  margin-bottom: 12px;
}
.module-card.large .mod-name { font-size: 40px; }
.mod-name em { font-style: italic; color: var(--burnished-gold); font-weight: 400; }
.mod-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(250, 247, 242, 0.65);
  max-width: 400px;
  margin-bottom: auto;
}
.mod-meta {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid rgba(184, 150, 58, 0.18);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.mod-meta .ref {
  font-family: var(--body);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: rgba(184, 150, 58, 0.65);
  text-transform: uppercase;
}
.mod-meta .arr {
  font-size: 16px;
  color: var(--burnished-gold);
  transition: transform 0.3s;
}
.module-card:hover .mod-meta .arr { transform: translateX(6px); }

/* Large card decoration */
.module-card.large::after {
  content: '';
  position: absolute;
  top: 56px; right: 48px;
  width: 80px; height: 80px;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg' fill='none' stroke='%23B8963A' stroke-width='0.7' opacity='0.6'%3E%3Ccircle cx='40' cy='40' r='38'/%3E%3Ccircle cx='40' cy='40' r='28'/%3E%3Ccircle cx='40' cy='40' r='18'/%3E%3Ccircle cx='40' cy='40' r='8'/%3E%3Cline x1='40' y1='2' x2='40' y2='78'/%3E%3Cline x1='2' y1='40' x2='78' y2='40'/%3E%3C/svg%3E");
}