/* Desktop composition for the Figma section "Для кого этот курс". */
.about-scroll-scene {
  position: relative;
  height: auto;
  background: #060b11;
}

.about-scroll-scene .split {
  position: relative;
  top: auto;
}

.about-background {
  position: absolute;
  z-index: -3;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 58%;
  display: block;
  pointer-events: none;
}

.split {
  width: 100%;
  max-width: none;
  min-height: 1210px;
  margin: 0;
  padding: 108px clamp(32px, 7.8vw, 112px) 119px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(260px, .58fr) minmax(360px, .82fr);
  grid-template-rows: auto auto auto;
  column-gap: clamp(28px, 3.8vw, 58px);
  row-gap: 40px;
  align-items: start;
  overflow: hidden;
  background: #060b11;
  color: #f4f1f6;
}

.split::before {
  content: "";
  position: absolute;
  z-index: -2;
  inset: 0;
  opacity: 1;
  background:
    linear-gradient(180deg, #030910 0%, rgba(3, 9, 16, .86) 9%, rgba(3, 9, 16, .38) 21%, transparent 36%),
    linear-gradient(90deg, rgba(6, 11, 20, .92) 0%, rgba(12, 20, 32, .72) 54%, rgba(8, 16, 27, .68) 100%);
}

.split::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -20% -21% -17%;
  opacity: .68;
  background: linear-gradient(180deg, #060b11 0%, rgba(6, 11, 17, .12) 35%, rgba(6, 11, 17, .38) 68%, #060b11 100%);
  pointer-events: none;
}

.split .section-intro { display: contents; }
.split .section-intro .eyebrow { display: none; }

.split .section-intro h2 {
  grid-column: 1 / -1;
  grid-row: 1;
  width: min(847px, 100%);
  max-width: none;
  margin: 0;
  color: #f4f1f6;
  font: 500 clamp(62px, 6vw, 86px) / 1.04 var(--serif);
  letter-spacing: -.045em;
}

.split .section-intro .lead {
  grid-column: 1;
  grid-row: 2;
  max-width: 640px;
  margin: 0;
  color: rgba(244, 241, 246, .72);
  font-size: 18px;
  line-height: 1.7;
}

.split .section-intro .about-advice {
  grid-column: 3;
  grid-row: 2;
  width: 100%;
  max-width: none;
  min-height: 176px;
  margin: 52px 0 0;
  padding: 25px 28px;
  display: flex;
  align-items: center;
  border: 1px solid rgba(168, 108, 227, .6);
  border-radius: 18px;
  background: rgba(12, 20, 32, .79);
  color: rgba(244, 241, 246, .7);
  font-size: 16px;
  font-weight: 300;
  line-height: 1.55;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .06), 0 26px 70px rgba(0, 0, 0, .22);
  backdrop-filter: blur(12px);
}

.about-pyramid {
  position: relative;
  z-index: 1;
  grid-column: 2;
  grid-row: 2;
  width: min(100%, 330px);
  height: 350px;
  margin: -18px auto -12px;
  overflow: visible;
  isolation: isolate;
}

.about-pyramid::after {
  content: "";
  position: absolute;
  z-index: -1;
  right: 14%;
  bottom: 7px;
  left: 14%;
  height: 34px;
  border-radius: 50%;
  background: rgba(0, 0, 0, .62);
  filter: blur(17px);
  transform: scaleX(1.2);
}

.about-pyramid-glow {
  position: absolute;
  z-index: -2;
  inset: 14% -18% -5%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(159, 84, 214, .2) 0%, rgba(93, 126, 255, .08) 36%, transparent 70%);
  filter: blur(22px);
  transition: opacity .35s ease, transform .55s cubic-bezier(.2, .8, .2, 1);
}

.about-pyramid-shape {
  --kinetic-x: 0px;
  --kinetic-y: 0px;
  --kinetic-rotate: 0deg;
  --kinetic-scale: 1;
  position: absolute;
  left: 50%;
  display: block;
  height: auto;
  object-fit: contain;
  pointer-events: none;
  filter: drop-shadow(0 18px 30px rgba(0, 0, 0, .32));
  transform-origin: 50% 50%;
  will-change: transform, translate, filter;
  transition: filter .3s ease;
}

.about-pyramid-ring {
  z-index: 4;
  top: 0;
  width: 92px;
  transform: translateX(calc(-50% + var(--kinetic-x))) translateY(var(--kinetic-y)) rotate(calc(-17deg + var(--kinetic-rotate))) scale(var(--kinetic-scale));
}

.about-pyramid-dispersion {
  z-index: 3;
  top: 82px;
  width: 150px;
  transform: translateX(calc(-50% + var(--kinetic-x))) translateY(var(--kinetic-y)) rotate(calc(7deg + var(--kinetic-rotate))) scale(var(--kinetic-scale));
}

.about-pyramid-cube {
  z-index: 2;
  bottom: 0;
  width: 190px;
  transform: translateX(calc(-50% + var(--kinetic-x))) translateY(var(--kinetic-y)) rotate(calc(-2deg + var(--kinetic-rotate))) scale(var(--kinetic-scale));
}

@media (hover: hover) and (pointer: fine) {
  .about-pyramid { cursor: grab; }
  .about-pyramid.is-kinetic { cursor: grabbing; }
  .about-pyramid.is-kinetic .about-pyramid-glow {
    opacity: 1;
    transform: scale(1.08);
  }
  .about-pyramid.is-kinetic .about-pyramid-shape {
    filter: drop-shadow(0 24px 38px rgba(69, 28, 109, .44)) brightness(1.06);
  }
}

@media (prefers-reduced-motion: reduce) {
  .about-pyramid-shape {
    --kinetic-x: 0px !important;
    --kinetic-y: 0px !important;
    --kinetic-rotate: 0deg !important;
    --kinetic-scale: 1 !important;
    will-change: auto;
  }
}

.about-pyramid-axis {
  position: absolute;
  z-index: 5;
  inset: 7px -14px 10px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-end;
  pointer-events: none;
}

.about-pyramid-axis span {
  padding: 7px 12px;
  border: 1px solid rgba(183, 121, 231, .4);
  border-radius: 999px;
  background: rgba(8, 14, 24, .68);
  color: rgba(244, 241, 246, .78);
  font-size: 16px;
  font-weight: 300;
  line-height: 1;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05);
  backdrop-filter: blur(10px);
}

.about-pyramid-axis span:nth-child(2) { align-self: flex-start; }

.split .check-card {
  grid-column: 1 / -1;
  grid-row: 3;
  width: 100%;
  max-width: none;
  min-height: 487px;
  margin-top: 3px;
  padding: 47px 51px 37px;
  border: 1px solid rgba(168, 108, 227, .6);
  border-radius: 18px;
  background: rgba(12, 20, 32, .79);
  box-shadow: none;
  backdrop-filter: blur(12px);
}

.split .check-card h3 {
  margin: 0 0 22px;
  color: #f4f1f6;
  font: 500 25px / 1.2 var(--serif);
}

.split .check-card ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(4, auto);
  grid-auto-flow: column;
  column-gap: clamp(58px, 7.7vw, 111px);
}

.split .check-card li {
  min-height: 73px;
  padding: 17px 0 17px 31px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  color: rgba(244, 241, 246, .72);
  font-size: 16px;
  font-weight: 300;
  line-height: 1.45;
}

.split .check-card li:nth-child(4),
.split .check-card li:last-child { border-bottom-color: transparent; }

.split .check-card li::before {
  content: "✓";
  top: 14px;
  left: 0;
  width: auto;
  height: auto;
  background: none;
  color: #b47be9;
  font-size: 19px;
  line-height: 1;
}

/* Temporary image supplied for the requests section. Keep the full diagram visible. */
.image-section .image-frame {
  aspect-ratio: 1222 / 1564;
  background: #07111e;
}

.image-section .image-frame img {
  object-fit: contain;
  filter: none;
}

.expert-photo img {
  object-position: center 28%;
  filter: none;
}

@media (max-width: 900px) {
  .about-scroll-scene { height: auto; }
  .about-scroll-scene .split { position: relative; top: auto; }

  .split {
    min-height: 0;
    padding: 30px 24px 80px;
    display: block;
  }

  .split .section-intro { display: block; }
  .split .section-intro h2 { font-size: clamp(48px, 12vw, 62px); }
  .split .section-intro .lead { margin-top: 26px; }
  .split .section-intro .about-advice { margin-top: 24px; }
  .about-pyramid { width: min(100%, 340px); height: 360px; margin: 34px auto 6px; }
  .split .check-card { min-height: 0; margin-top: 28px; padding: 32px 26px; }
  .split .check-card ul { display: block; }
  .split .check-card li:nth-child(4) { border-bottom-color: rgba(255, 255, 255, .12); }
}