.systems {
  padding: 0 !important;          /* kill the .section padding */
  height: 100vh;
  overflow: hidden;
  position: relative;
  contain: none;
  display: flex;
  flex-direction: column;
}

/* Header inside the 100vh section */
.systems .section__header {
  flex: 0 0 auto;
  padding: clamp(80px, 10vh, 100px) var(--gutter) clamp(1rem, 2vh, 1.5rem);
  margin-bottom: 0;
  max-width: var(--container);
  margin-inline: auto;
  width: 100%;
}

.systems__pin {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.systems__track {
  display: flex;
  flex-wrap: nowrap;
  align-items: stretch;
  height: 100%;
  gap: 40px;
  padding-inline: var(--gutter);
  will-change: transform;
  transform: translate3d(0,0,0);
  backface-visibility: hidden;
}

.system-card {
  flex: 0 0 auto;
  width: 72vw;
  min-width: 560px;
  max-width: 1060px;
  height: 100%;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 32px;
  padding: clamp(24px, 3vw, 44px);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(20,224,213,0.04), transparent 50%),
    var(--bg-elev-1);
  border: 1px solid var(--hairline);
  position: relative;
  overflow: hidden;
  transform: translateZ(0);
  box-sizing: border-box;
}
.system-card__text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 480px;
}
.system-card__tag {
  color: var(--teal) !important;
  margin-bottom: 18px;
  font-size: 0.6875rem;
}
.system-card__title {
  font-family: var(--font-sans);
  font-size: clamp(2rem, 3.4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 6px;
}
.system-card__subtitle {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.system-card__body {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 28px;
}
.system-card__specs {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.system-card__specs li {
  position: relative;
  padding-left: 22px;
  color: var(--text);
  font-size: 0.9375rem;
}
.system-card__specs li::before {
  content: '';
  position: absolute;
  left: 0; top: 11px;
  width: 12px; height: 1px;
  background: var(--teal);
}

.system-card__visual {
  position: relative;
  border-radius: var(--radius-sm);
  background:
    radial-gradient(circle at center, rgba(20,224,213,0.08), transparent 70%),
    var(--bg-elev-2);
  border: 1px solid var(--hairline);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Aqua waves */
.visual-aqua .wave-1 { animation: waveFloat 6s ease-in-out infinite; }
.visual-aqua .wave-2 { animation: waveFloat 5s ease-in-out infinite reverse; }
.visual-aqua .wave-3 { animation: waveFloat 7s ease-in-out infinite; }
@keyframes waveFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* Emission bars */
.visual-emission .bar { transition: height 1.2s var(--ease-out-expo), y 1.2s var(--ease-out-expo); }
.visual-emission.is-in .bar { /* handled by JS */ }

/* Marine sonar */
.visual-marine .sonar-sweep { animation: sonar 4s linear infinite; }
.visual-marine .ping { animation: ping 2s ease-in-out infinite; }
.visual-marine .ping:nth-child(2) { animation-delay: 0.5s; }
.visual-marine .ping:nth-child(3) { animation-delay: 1s; }
@keyframes sonar { to { transform: rotate(360deg); } }
@keyframes ping {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.6); }
}

/* ROS orbits */
.visual-ros .orbit-1 { animation: orbit 12s linear infinite; }
.visual-ros .orbit-2 { animation: orbit 8s linear infinite reverse; }
.visual-ros .orbit-3 { animation: orbit 6s linear infinite; }
@keyframes orbit { to { transform: rotate(360deg); } }


/* Aqua Insight - floating nodes */
.visual-aqua .node-top { animation: float 4s ease-in-out infinite; }
.visual-aqua .node-top:nth-child(2) { animation-delay: 0.3s; }
.visual-aqua .node-top:nth-child(3) { animation-delay: 0.6s; }
.visual-aqua .node-mid { animation: float 4s ease-in-out infinite; }
.visual-aqua .node-mid:nth-child(2) { animation-delay: 0.3s; }
.visual-aqua .node-mid:nth-child(3) { animation-delay: 0.6s; }
.visual-aqua .node-bot { animation: float 4s ease-in-out infinite; }
.visual-aqua .node-bot:nth-child(2) { animation-delay: 0.3s; }
.visual-aqua .node-bot:nth-child(3) { animation-delay: 0.6s; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

/* Emission - data stream */
.visual-emission .data-stream { animation: stream 3s linear infinite; }
@keyframes stream { 0% { transform: translateY(0); } 100% { transform: translateY(-20px); } }

@media (prefers-reduced-motion: reduce) {
  .visual-aqua .wave-1, .visual-aqua .wave-2, .visual-aqua .wave-3,
  .visual-marine .sonar-sweep, .visual-marine .ping,
  .visual-ros .orbit-1, .visual-ros .orbit-2, .visual-ros .orbit-3 {
    animation: none;
  }
}

.systems__dots {
  display: flex;
  gap: 12px;
  justify-content: center;
  padding-block: 32px 80px;
}
.systems__dots .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--hairline-strong);
  cursor: pointer;
  transition: background 0.3s, transform 0.3s, width 0.3s;
}
.systems__dots .dot.active {
  background: var(--teal);
  width: 24px;
  border-radius: 4px;
}

@media (max-width: 840px) {
  .systems__pin {
    height: auto;
    overflow: visible;
  }
  .systems__track {
    flex-direction: column;
    gap: 20px;
    height: auto;
    padding-block: 20px 40px;
    transform: none !important;
  }
  .system-card {
    width: 100%;
    min-width: 0;
    height: auto;
    grid-template-columns: 1fr;
    padding: 32px;
  }
  .system-card__visual { min-height: 240px; }
}