.challenge {
  padding-block: var(--section-pad-y);
  position: relative;
  overflow: hidden;
}

.challenge::before {
  content: "";
  position: absolute;
  right: -20%;
  top: 20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(92, 69, 255, 0.18), transparent 65%);
  pointer-events: none;
  z-index: 0;
}

.challenge__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: var(--space-6);
  align-items: start;
}

.challenge__copy {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 491px;
}

.challenge__header {
  display: flex;
  flex-direction: column;
  gap: 27px;
}

.challenge__title {
  font: 500 clamp(28px, 3.5vw, 37px)/1.3 var(--font-sans);
  letter-spacing: -0.06em;
}

.challenge-list {
  padding: 0;
  margin: 0;
}

.challenge-list__item {
  display: block;
  border-bottom: 1px solid var(--color-border);
}

.challenge-list__item[open] {
  border-bottom: none;
}

.challenge-list__item[open]::after {
  content: "";
  display: block;
  height: 1px;
  background: linear-gradient(to right, var(--color-brand), transparent);
}

.challenge-list__item::part(base) {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
}

.challenge-list__item::part(header) {
  font: var(--type-h4);
  letter-spacing: -0.06em;
  color: var(--color-text);
  padding-block: 10px;
  padding-inline: 0;
}

.challenge-list__item::part(header):hover {
  background: transparent;
  color: var(--color-text);
}

.challenge-list__item::part(summary-icon) {
  display: none;
}

.challenge-list__item::part(content) {
  padding: 0;
}

.challenge-list__detail {
  font: var(--type-body);
  color: var(--color-text-muted);
  padding-bottom: 22px;
  padding-right: var(--space-4);
}

.challenge__right {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.challenge__lead {
  font: 400 20px/1.3 var(--font-sans);
  letter-spacing: -0.06em;
  color: var(--color-text);
  width: 70%;
  margin-left: auto;
}

@media (max-width: 1280px) {
  .challenge__lead {
    width: 85%;
  }
}

@media (max-width: 1023px) {
  .challenge__lead {
    width: 100%;
    margin-left: 0;
  }
}

.challenge__visual {
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  /* background: var(--color-surface); */
  min-height: 470px;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.challenge__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 100%, rgba(152, 67, 255, 0.3), transparent 60%);
  pointer-events: none;
  z-index: 1;
}

.challenge__visual-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: auto;
  object-fit: cover;
  object-position: center;
  /* mix-blend-mode: plus-lighter; */
}

@media (max-width: 1023px) {
  .challenge__inner {
    grid-template-columns: 1fr;
  }

  .challenge__visual {
    min-height: 320px;
  }
}