.hero-banner {
  height: 420px;

  background-image:
    linear-gradient(
      rgba(3, 7, 13, 0.18),
      rgba(3, 7, 13, 0.48)
    ),
    url("../images/hero-desktop.png");

  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-content-section,
.material-section {
  position: relative;
  overflow: visible;
  background: transparent;
}


.hero-content-section {
  padding: 46px 18px 34px;
  text-align: center;
  background: transparent;
}

.material-section {
  padding: 28px 18px 42px;
  background: transparent;
}

.hero-content,
.material-slider-card {
  position: relative;
  z-index: 1;
}

.subline {
  max-width: 680px;
  margin: 0 auto;
  color: #c6d3e4;
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.6;
}

.cta {
  margin-top: 18px;
  padding: 14px 34px;
  border: none;
  border-radius: 10px;

  background: linear-gradient(135deg, #006dff, #00a6ff);
  color: white;

  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;

  box-shadow:
    0 0 18px rgba(0, 145, 255, 0.5),
    0 0 36px rgba(0, 145, 255, 0.2);

  transition: transform 0.2s, box-shadow 0.2s;
}

.cta:hover {
  transform: translateY(-2px);
  box-shadow:
    0 0 24px rgba(0, 170, 255, 0.65),
    0 0 46px rgba(0, 145, 255, 0.28);
}

.material-section {
  padding: 28px 18px 42px;
  background: transparent;
}

.material-slider-card {
  width: 100%;
  max-width: 460px;
  height: 450px;

  margin: 0 auto;
  padding: 18px;

  display: flex;
  flex-direction: column;

  text-align: left;

  background: rgba(8, 15, 28, 0.404);
  border: 1px solid rgba(0, 166, 255, 0.16);
  border-radius: 18px;

  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);

  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.28);
  overflow: hidden;

  transition: opacity 0.25s ease, transform 0.25s ease;
}

.material-slider-card.is-changing {
  opacity: 0;
  transform: translateY(6px);
}

.material-slider-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.material-label {
  color: #0aa7ff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

#sliderMaterialName {
  color: #ffffff;
  font-size: 1.35rem;
}

#sliderMaterialDescription {
  min-height: 44px;
  color: #c6d3e4;
  line-height: 1.45;
  margin-bottom: 14px;
}

.material-slider-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 10px;
}

.material-slider-grid h4 {
  color: #ffffff;
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.material-slider-grid ul {
  min-height: 92px;
  list-style: none;
}

.material-slider-grid li {
  color: #aebed2;
  font-size: 0.86rem;
  line-height: 1.45;
}

.material-slider-grid li::before {
  content: "• ";
  color: #00a6ff;
}

.material-use {
  margin-top: auto;
  color: #8fa8c5;
  font-size: 0.86rem;
  line-height: 1.45;
}

.site-grid-bg {
  position: relative;
  overflow: hidden;

}

.site-grid-bg::before {
  content: "";
  position: absolute;

  top: -40px;
  left: 0;
  right: 0;
  bottom: -260px;

  background-image:
    linear-gradient(
      rgba(0,160,255,0.08) 1px,
      transparent 1px
    ),
    linear-gradient(
      90deg,
      rgba(0,160,255,0.08) 1px,
      transparent 1px
    );

  background-size: 62px 62px;

  transform:
    perspective(1200px)
    rotateX(48deg)
    scaleY(1.15);

  transform-origin: top center;

  opacity: 1;

  pointer-events: none;
  z-index: 0;
}

.site-grid-bg::after {
  content: "";
  position: absolute;
  inset: 0;

  background:
    radial-gradient(
      circle at 50% 0%,
      rgba(0,145,255,0.16),
      transparent 60%
    );

  pointer-events: none;
  z-index: 0;
}

.hero-content-section,
.material-section {
  position: relative;
  z-index: 1;
}