html {
  min-width: 0;
}

.corporate-governance-section-opener-page .section-opener-number {
  font-weight: 900;
  z-index: 3;
}

.corporate-governance-section-opener-page .section-opener-main {
  display: block;
}

.corporate-governance-section-opener-page .section-opener-copy {
  width: 46%;
}

.corporate-governance-section-opener-page .section-opener-list {
  gap: clamp(8px, 1vh, 12px);
  margin-top: clamp(30px, 4vh, 44px);
  max-width: 560px;
}

.corporate-governance-section-opener-page .section-opener-visual {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.corporate-governance-section-opener-page .section-opener-visual-art {
  inset: 0;
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  background-image: url("assets/section-openers/corporate-governance/chapter4-bg.jpg");
  background-position: left top;
  background-size: cover;
  background-blend-mode: multiply;
}

/*
 * Two source-derived energy channels share the exact 2560×1440 background
 * geometry. Only pixels already present in the approved illustration can glow:
 * the warm road/roof traces lead, followed by the cyan interface artwork.
 */
.corporate-governance-section-opener-page .corporate-governance-energy-wave {
  inset: 0;
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  object-fit: cover;
  object-position: left top;
  animation-name: corporate-governance-dual-energy-wave;
  animation-duration: 9.6s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}

.corporate-governance-section-opener-page .corporate-governance-energy-wave--warm {
  animation-delay: 620ms;
}

.corporate-governance-section-opener-page .corporate-governance-energy-wave--blue {
  animation-delay: 1.82s;
}

.corporate-governance-section-opener-page .corporate-governance-energy-wave--blue.section-opener-energy-wave--halo {
  --v4-energy-wave-opacity: 0.64;
  filter: saturate(1.42) brightness(1.08) drop-shadow(0 0 9px rgba(32, 190, 255, 0.84));
}

.corporate-governance-section-opener-page .corporate-governance-energy-wave--blue.section-opener-energy-wave--core {
  --v4-energy-wave-opacity: 0.9;
  filter: brightness(1.26) contrast(1.06) drop-shadow(0 0 4px rgba(188, 246, 255, 0.94));
}

@keyframes corporate-governance-dual-energy-wave {
  0%,
  8% {
    opacity: 0;
    -webkit-mask-position: 50% 122%;
    mask-position: 50% 122%;
  }

  13% {
    opacity: var(--v4-energy-wave-opacity);
  }

  72% {
    opacity: var(--v4-energy-wave-opacity);
    -webkit-mask-position: 50% 22%;
    mask-position: 50% 22%;
  }

  82%,
  100% {
    opacity: 0;
    -webkit-mask-position: 50% 16%;
    mask-position: 50% 16%;
  }
}

@media (max-width: 86rem) {
  .corporate-governance-section-opener-page .section-opener-copy {
    width: 49%;
  }
}

@media (max-width: 68.75rem) {
  .corporate-governance-section-opener-page .section-opener-copy {
    width: 54%;
  }
}

@media (max-width: 50rem) {
  .corporate-governance-section-opener-page .section-opener-number {
    top: 0;
    font-size: clamp(68px, 18vw, 86px);
  }

  .corporate-governance-section-opener-page .section-opener-main {
    display: flex;
  }

  .corporate-governance-section-opener-page .section-opener-copy {
    width: 100%;
  }

  .corporate-governance-section-opener-page .section-opener-title {
    max-width: 100%;
  }

  .corporate-governance-section-opener-page .section-opener-list {
    max-width: none;
  }

  .corporate-governance-section-opener-page .section-opener-visual {
    position: relative;
    inset: auto;
    height: clamp(330px, 70vw, 500px);
    margin-top: auto;
  }

  .corporate-governance-section-opener-page .section-opener-visual-art {
    inset: 0;
    height: 100%;
    aspect-ratio: auto;
    background-size: contain;
    background-position: left top;
  }

  .corporate-governance-section-opener-page .corporate-governance-energy-wave {
    inset: 0;
    width: 100%;
    height: 100%;
    aspect-ratio: auto;
    object-fit: contain;
    object-position: left top;
  }
}

@media (max-width: 30rem) {
  .corporate-governance-section-opener-page .section-opener-visual {
    height: clamp(280px, 82vw, 330px);
  }
}