.step-selector-wrap {
  --sr-red: #ba0000;
  --sr-heading: #17181c;
  --sr-subtitle: #535862;
  --sr-body: #5b6470;
}

.step-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

/* LEFT — steps */
.step-selector__left {
  position: relative;
  display: flex;
  flex-direction: column;
}

.step-selector__left::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: #e5e7eb;
  z-index: 0;
}

.step-selector__step {
  position: relative;
  z-index: 1;
  padding: 28px 10px 28px 24px;
  border-left: 4px solid transparent;
  cursor: pointer;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.step-selector__step.active,
.step-selector__step:hover {
  border-left-color: var(--sr-red);
  background: #faf4f4;
}

/* badge */
.step-badge {
  display: inline-block;
  background-color: var(--sr-red);
  color: #fff;
  padding: 6px 14px;
  border-radius: 4px;
  font-family: "Inter", sans-serif;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.step-selector__title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.step-selector__title-row .step-selector__title {
  margin: 0;
}

/* title / subtitle / body */
.step-selector__title {
  margin: 0 0 6px;
  font-family: "Inter", sans-serif;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--sr-heading);
}

.step-selector__subtitle {
  margin: 0 0 10px;
  font-family: "Inter", sans-serif;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--sr-subtitle);
}

.step-selector__body {
  margin: 0 0 14px;
  font-family: "Inter", sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--sr-body);
}

.step-selector__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: "Inter", sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--sr-red);
  text-decoration: none;
}

.step-selector__link svg {
  transition: transform 0.25s ease;
}

.step-selector__step:hover .step-selector__link svg,
.step-selector__step.active .step-selector__link svg {
  transform: translateX(4px);
}

/* RIGHT — sticky image */
.step-selector__right {
  position: sticky;
  top: 120px;
}

.step-selector__image-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border-radius: 20px;
  background: #111;
}

.step-selector__image-wrap .step-selector__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0;
  z-index: 0;
  transition: opacity 0.5s ease;
}

.step-selector__img.active {
  opacity: 1;
  z-index: 1;
}

/* The gliding bar is only used on mobile (see the media query below). */
.step-selector__indicator {
  display: none;
}

@media (max-width: 768px) {
  .step-selector {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .step-selector__right {
    display: none;
  }

  .step-selector__step {
    padding: 20px 10px 35px 10px;
    transition: background-color 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* One red bar glides from step to step (moved by the script), instead of
     every step switching its own border colour. */
  .step-selector__step.active,
  .step-selector__step:hover {
    border-left-color: transparent;
  }

  .step-selector__indicator {
    display: block;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 2;
    width: 4px;
    height: var(--ind-h, 0);
    background: var(--sr-red);
    transform: translateY(var(--ind-y, 0));
    pointer-events: none;
  }

  .step-selector-wrap.is-ready .step-selector__indicator {
    transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1), height 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* The arrow of the active step eases over instead of jumping. */
  .step-selector .step-selector__step .step-selector__link svg {
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), color 0.2s ease;
  }

  @media (prefers-reduced-motion: reduce) {
    .step-selector__step,
    .step-selector-wrap.is-ready .step-selector__indicator,
    .step-selector .step-selector__step .step-selector__link svg {
      transition: none;
    }
  }
}

/* Link hover: text and arrow both turn the body grey. The arrow's stroke
   is currentColor, so it follows the colour set here (red by default). */
.step-selector .step-selector__link svg {
  color: var(--sr-red);
  transition: transform 0.25s ease, color 0.2s ease;
}

.step-selector .step-selector__link {
  transition: color 0.2s ease;
}

.step-selector .step-selector__link:hover,
.step-selector .step-selector__link:focus,
.step-selector .step-selector__link:hover svg,
.step-selector .step-selector__link:focus svg {
  color: var(--sr-body);
}