/* Kelvin spectrum lab — shared by Lumen + Classic homepages */
.lm-spectrum {
  position: relative;
  padding: 3.5rem 0;
  background:
    radial-gradient(700px 280px at 80% 20%, rgba(var(--theme-accent-rgb), 0.12), transparent 60%),
    linear-gradient(180deg, var(--theme-footer-bg) 0%, var(--theme-ink) 100%);
  color: #fff;
  overflow: hidden;
}
.lm-spectrum::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, transparent, #000 20%, #000 80%, transparent);
  pointer-events: none;
  opacity: 0.5;
}
.lm-spectrum__grid {
  position: relative;
  display: grid;
  gap: 2rem;
  align-items: center;
}
.lm-spectrum .lm-eyebrow {
  margin: 0 0 0.85rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #7dd3fc;
}
.lm-spectrum__copy h2 {
  margin: 0.35rem 0 0;
  font-family: var(--theme-font-display);
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  line-height: 1.2;
  max-width: 16ch;
  color: #fff;
}
.lm-spectrum__copy p {
  margin: 1rem 0 0;
  max-width: 34rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.65;
}
.lm-spectrum__stage {
  display: grid;
  gap: 1rem;
}
.lm-spectrum__preview {
  position: relative;
  height: 180px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.12);
  background: radial-gradient(circle at 50% 40%, rgba(255,228,206,0.95), rgba(6,17,28,0.2) 70%);
  overflow: hidden;
  box-shadow:
    inset 0 0 40px rgba(0,0,0,0.35),
    0 0 40px rgba(var(--theme-accent-rgb), 0.15);
}
.lm-spectrum__preview::after {
  content: "";
  position: absolute;
  inset: auto 18% 18% 18%;
  height: 10px;
  border-radius: 999px;
  background: rgba(0,0,0,0.35);
  box-shadow: 0 0 30px rgba(var(--lm-kelvin-rgb, 255, 228, 206), 0.55);
}
.lm-spectrum__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.75);
}
.lm-spectrum__meta strong {
  color: var(--theme-accent);
  font-family: var(--theme-font-display);
  font-weight: 700;
}
.lm-spectrum__track {
  position: relative;
  height: 14px;
  border-radius: 999px;
  cursor: pointer;
  touch-action: none;
  background: linear-gradient(90deg,
    rgb(255, 147, 41) 0%,
    rgb(255, 180, 107) 20%,
    rgb(255, 214, 170) 40%,
    rgb(255, 240, 230) 55%,
    rgb(220, 235, 255) 75%,
    rgb(180, 210, 255) 100%);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.15);
}
.lm-spectrum__thumb {
  position: absolute;
  top: 50%;
  left: 45%;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  border: 2px solid rgba(4, 16, 24, 0.85);
  box-shadow: 0 0 0 4px rgba(var(--theme-accent-rgb), 0.25), 0 8px 20px rgba(0,0,0,0.35);
  pointer-events: none;
}
.lm-spectrum__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.lm-spectrum__chips button {
  appearance: none;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.04);
  color: rgba(255,255,255,0.8);
  border-radius: 4px;
  padding: 0.4rem 0.65rem;
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
}
.lm-spectrum__chips button.is-active {
  border-color: rgba(var(--theme-accent-rgb), 0.7);
  color: #ffffff;
  background: var(--theme-accent);
}

.lm-orbit {
  position: relative;
  margin: 2.5rem 0 0;
  height: 120px;
  display: grid;
  place-items: center;
}
.lm-orbit__ring {
  position: absolute;
  border: 1px dashed rgba(var(--theme-accent-rgb), 0.35);
  border-radius: 50%;
  animation: lm-orbit-spin 18s linear infinite;
}
.lm-orbit__ring--a { width: 110px; height: 110px; }
.lm-orbit__ring--b {
  width: 160px;
  height: 160px;
  animation-duration: 28s;
  animation-direction: reverse;
  border-color: rgba(var(--theme-accent-2-rgb), 0.25);
}
.lm-orbit__core {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, #fff, rgba(var(--theme-accent-rgb), 0.95) 45%, rgba(var(--theme-accent-rgb), 0.2) 70%, transparent 72%);
  box-shadow: 0 0 30px rgba(var(--theme-accent-rgb), 0.55);
  animation: lm-core-pulse 2.8s ease-in-out infinite;
}
.lm-orbit__dot {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--theme-accent);
  box-shadow: 0 0 12px rgba(var(--theme-accent-rgb), 0.8);
  top: 50%;
  left: 50%;
  --orbit-r: 55px;
  transform: translate(-50%, -50%) rotate(var(--a, 0deg)) translateY(calc(var(--orbit-r) * -1));
  animation: lm-orbit-dot 12s linear infinite;
}
.lm-orbit__dot:nth-child(4) { animation-duration: 14s; }
.lm-orbit__dot:nth-child(5) { animation-duration: 18s; animation-direction: reverse; }
.lm-orbit__dot:nth-child(6) { animation-duration: 11s; }

@keyframes lm-orbit-spin {
  to { transform: rotate(360deg); }
}
@keyframes lm-orbit-dot {
  from {
    transform: translate(-50%, -50%) rotate(var(--a, 0deg)) translateY(calc(var(--orbit-r, 55px) * -1));
  }
  to {
    transform: translate(-50%, -50%) rotate(calc(var(--a, 0deg) + 360deg)) translateY(calc(var(--orbit-r, 55px) * -1));
  }
}
@keyframes lm-core-pulse {
  0%, 100% { transform: scale(1); filter: brightness(1); }
  50% { transform: scale(1.08); filter: brightness(1.15); }
}

@media (min-width: 960px) {
  .lm-spectrum__grid {
    grid-template-columns: 1fr 1.05fr;
    gap: 3rem;
  }
  .lm-spectrum__preview { height: 220px; }
}

@media (prefers-reduced-motion: reduce) {
  .lm-orbit__ring,
  .lm-orbit__core,
  .lm-orbit__dot { animation: none; }
}