* {
  box-sizing: border-box;
  font-family: Helvetica system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif,
    sans-serif;
}

body {
  margin: 0;
  padding: 0;
  width: 100%;
}

.image-container-1 img {
  max-width: 450px;
  height: 517px;
  object-fit: contain;
  z-index: 0;
}

.image-container-1 {
  display: flex;
  gap: 280px;
  justify-content: left;
  align-items: center;
  left: 50%;
  padding: 20px;
  margin-top: 15vh;
  transition: transform 2s ease;
  overflow: visible;
  width: 100%;
  position: relative;
}

.image-container-2 {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  transition: transform 2s ease;
  overflow: visible;
  width: 100%;
  position: relative;
  pointer-events: auto;
}

#scroll-1,
#scroll-2 {
  position: relative;
  pointer-events: all;
}

.scroll-graphic {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: left;
  z-index: 0;
  width: 100vw;
  overflow: visible;
}

.scroll-graphic-2 {
  position: sticky;
  display: flex;
  top: 0;
  align-items: center;
  justify-content: center;
  z-index: 0;
  width: 100vw;
  overflow: visible;
  margin-top: 50px;
  pointer-events: none;
}

.scroll-text {
  padding: 1rem;
  padding-right: 5rem;
  max-width: 30rem;
  position: relative;
  margin: 0 auto;
  z-index: 5;
  pointer-events: visible;
  bottom: 50vh;
}

.scroll-text-2 {
  padding: 1rem;
  max-width: 30rem;
  position: relative;
  z-index: 20;
  margin: 0 auto;
  pointer-events: all;
  text-align: center;
  align-items: center;
  justify-content: center;
  margin-top: 1rem;
  bottom: 0;
}

.scroll-graphic-2 * {
  pointer-events: auto; /* allow hovering on chart dots */
}

.step-2 {
  text-align: left;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  margin-bottom: 70vh;
  transition: transform 0.6s ease;
  opacity: 1;
  font-size: 1.1rem;
  background-color: rgb(255, 255, 255);
}

#scroll-1::after {
  content: "";
  display: block;
  height: 10vh;
}

#scroll-2::after {
  content: "";
  display: block;
  height: 20vh;
}

.step {
  margin-right: 20vh;
  text-align: left;
  padding: 1rem;
  margin-bottom: 70vh;
  transition: transform 0.6s ease;
  opacity: 1;
  font-size: 1.1rem;
  background-color: rgba(255, 255, 255, 0.694);
}
.scroll-header {
  margin-left: 22%;
  margin-right: 22%;
  padding: 10px;
  position: sticky;
  top: 0;
  z-index: 5;
  text-align: left;
  font-size: 1.2rem;
  font-weight: bold;
  margin-top: 20px;
  margin-bottom: 20px;
  background-color: white;
}

.sticky-source {
  top: 0;
  z-index: 5;
  text-align: left;
  margin-left: 22%;
  margin-right: 22%;
  padding: 20px;
  line-height: 1.2;
  background-color: white;
}

.sticky-container {
  display: flex;
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: left;
}

.headline {
  font-size: 3.5rem;
  text-align: center;
  font-weight: 500;
  padding: 10px;
  line-height: 1.2;
  padding-bottom: 30px;
}

.main-article {
  margin-left: 22%;
  margin-right: 22%;
  padding: 10px;
  line-height: 1.6;
}

.para {
  padding: 10px;
  font-size: 1.1rem;
}

.sub {
  padding: 10px;
  font-size: 1.2rem;
  font-weight: bold;
}

.byline {
  padding: 10px;
  font-size: 1.1rem;
  text-align: center;
  padding-bottom: 20px;
  color: #555;
}

.charts {
  text-align: center;
  padding: 10px;
  position: relative;
  z-index: 2;
}

.chart-title {
  font-size: 1.2rem;
  font-weight: bold;
  text-align: left;
  padding-top: 10px;
  padding-bottom: 20px;
}
.chart-subtitle {
  font-size: 1.1rem;
  text-align: left;
  padding-bottom: 20px;
}

.tooltip {
  position: absolute;
  background: white;
  border: 1px solid #aaa;
  padding: 6px 10px;
  font-size: 0.8rem;
  pointer-events: all;
  opacity: 0;
  z-index: 10;
}

.source-text {
  font-size: 0.8rem;
  text-align: left;
  color: #555;
  padding: 10px;
}

#photo {
  object-fit: contain;
  padding: 10px;
  max-width: 700px;
  width: 90%;
  height: auto;
  text-align: center;
  align-items: center;
}

/* responsive */

@media (max-width: 768px) {
  .image-container-1 {
    flex-direction: column;
    gap: 20px;
    margin-top: 5vh;
    align-items: center;
  }

  .image-container-1 img,
  .image-container-2 img {
    max-width: 90%;
    height: auto;
  }

  .image-container-2 {
    flex-direction: column;
    padding: 10px;
  }

  .scroll-text,
  .scroll-text-2,
  .step,
  .step-2 {
    padding: 0.8rem;
    margin-bottom: 40vh;
    font-size: 0.95rem;
  }

  .scroll-graphic,
  .scroll-graphic-2 {
    flex-direction: column;
    align-items: center;
  }

  .scroll-header,
  .sticky-source,
  .main-article {
    margin-left: 5%;
    margin-right: 5%;
  }

  .headline {
    font-size: 2.8rem;
    padding: 5px;
  }

  .para {
    font-size: 1rem;
  }

  .sub {
    font-size: 1.1rem;
  }

  .charts {
    width: 90%;
    margin: 0 auto;
  }

  .chart-title {
    font-size: 1.2rem;
  }

  .chart-subtitle {
    font-size: 1.1rem;
  }
}