:root {
  --byline-color: #5e3846;
  --background-color: #39161e;
  --dark-color: #2b151a;
  --accent-color: #5e3846;
  --text-color: #fff;
  --hyperlink-color: #0066cc;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--background-color);
}

#pre-map {
  position: relative;
  z-index: 1;
  transition: filter 1s ease-out;
  padding: 2rem;
  width: 55%;
  margin: 0 auto;
  color: var(--text-color);
}

.scroll {
  position: relative;
  width: 100%;
}

.scrolly {
  height: auto;
  overflow-y: visible;
}

article {
  position: relative;
  padding: 0;
  margin: auto;
}

.step:last-child {
  margin-bottom: 0;
  min-height: auto;
}

.step {
  width: 50%;
  margin: 0 auto 30rem 0;
  padding: 1.2rem;
  margin-left: 5rem;
  font-size: 1.2rem;
  border-radius: 0.5rem;
  color: var(--text-color);
  position: relative;
  z-index: 2;
  background-color: var(--background-color);
}

.photo-full {
  width: 100%;
  margin-left: 0;
  margin-bottom: 5rem;
  height: 100vh;
  position: relative;
  top: 0;
  display: block;
  z-index: 0;
}

.photo-full img {
  width: 100%;
  height: 100vh;
  object-fit: cover;
  display: block;
}

#photo-credit-full {
  margin: 0.5rem auto 0 auto;
  color: var(--text-color);
  text-align: center;
}

.step.lede {
  padding-top: 0;
  margin: 0 auto 10rem auto;
  background-color: transparent;
}

.step[data-step="7"],
.step[data-step="8"],
.step[data-step="9"],
.step[data-step="10"] {
  margin-bottom: 5rem;
  padding-bottom: 0;
}

.step-img {
  width: 100%;
  height: 100%;
}

.photo {
  padding: 0;
  margin: 0;
  width: 100vw;
  height: 100vh;
  position: sticky;
  top: 0;
  z-index: 0;
  margin-bottom: 0;
}

.photo.unpinned {
  position: relative;
  top: auto;
  z-index: 0;
  margin-bottom: 4rem;
}

.photo-double {
  width: 100vw;
  display: flex;
  position: relative;
  height: auto;
  margin-top: 5rem;
}

#step-photo-credit,
#photo-credit-double {
  display: block;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-color);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  margin: 0.5rem 0 5rem 0;
}

#step-photo-credit {
  width: 100%;
}

@media (max-width: 900px) {
  .photo-double {
    flex-direction: column;
    height: auto;
    position: relative;
    margin: 1rem 0;
    width: 100%;
    margin-left: 0;
  }
}

.photo-grid {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  align-items: stretch;
  margin: 1rem 0 1.5rem 0;
}

.photo-grid img {
  width: 100%;
  height: auto;
  max-height: 32vh;
  object-fit: cover;
  display: block;
}

@media (max-width: 900px) {
  .photo-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .photo-grid img {
    max-height: 28vh;
  }
}

@media (max-width: 600px) {
  .photo-grid {
    width: 100%;
    margin-left: 0;
    grid-template-columns: 1fr;
  }
  .photo-grid img {
    max-height: 40vh;
  }
  #photo-credit-grid {
    width: 100%;
    margin-left: 0;
  }
}

.photo img {
  display: block;
  width: 100%;
  height: 100vh;
  object-fit: cover;
  transition: opacity 600ms cubic-bezier(0.2, 0, 0.08, 1);
  will-change: opacity;
  opacity: 1;
}

.photo img.fade-out {
  opacity: 0;
}

#photo-credit {
  position: absolute;
  right: 2rem;
  bottom: 1rem;
  font-size: 0.8rem;
  width: auto;
  text-align: right;
  color: var(--text-color);
  background: rgba(0, 0, 0, 0.35);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
}

.step p,
p,
ul,
button {
  display: inline;
  font-size: 1.2rem;
  padding: 0;
  vertical-align: text-top;
  font-family: "freight-text-pro", "Times", serif;
  font-optical-sizing: auto;
  font-weight: 400;
  font-style: normal;
  line-height: 1.3rem;
  color: var(--text-color);
}

#home {
  visibility: hidden;
}

#heading {
  width: 80%;
  margin: auto;
  height: 100vh;
  text-align: center;
  padding: 5rem 0 0 0;
}

#heading h3 {
  font-size: 2.5rem;
  font-family: "Playfair Display", serif;
  font-optical-sizing: auto;
  font-weight: 800;
  font-style: normal;
  padding: 0;
  margin-top: 16px;
  margin-bottom: 22px;
  text-align: center;
  color: var(--text-color);
}

#heading p {
  text-align: center;
  font-style: italic;
}

#byline {
  font-weight: normal;
  font-family: "Inconsolata", serif;
  font-size: 0.8rem;
  text-align: center;
}

#byline .author {
  background-color: var(--byline-color);
  padding: 0.2rem;
  padding-left: 0.4rem;
  padding-right: 0.4rem;
  border-radius: 0.5rem;
  font-weight: bold;
  line-height: 1.5rem;
  white-space: nowrap;
  text-align: center;
  color: var(--text-color);
}

a {
  color: inherit;
  text-decoration: inherit;
}

#herald-logo {
  max-width: 450px;
  display: block;
  margin: 0 auto;
}

/* mobile formatting */
@media (max-width: 600px) {
  .profile-img {
    width: 100px;
    height: 100px;
  }

  #herald-logo {
    display: block;
    margin: 0 auto;
    max-width: 150px;
  }

  #heading h3 {
    font-size: 1.6rem;
  }

  #heading p {
    font-size: 1rem;
  }

  .step p {
    font-size: 1.1rem;
  }

  .scrolly {
    width: 100%;
    padding: 0;
    margin: 0;
  }

  #heading {
    text-align: center;
  }

  .scroll {
    flex-direction: column;
  }

  #toc {
    display: none;
  }
}

@media (max-width: 600px) {
  .step:not(.lede) {
    padding-left: 1.35rem;
  }
}

#accent {
  color: var(--accent-color);
  animation: fadeToAccent 2s forwards;
}

@keyframes fadeToAccent {
  to {
    color: var(--text-color);
  }
}

#scroll-container {
  position: relative;
  height: 100vh;
  display: flex;
}

#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 6px;
  width: 0%;
  background: var(--accent-color);
  z-index: 9999;
  transition: width 0.1s linear;
}

img {
  max-width: 100%;
  margin-bottom: 0;
}

.embedded-img {
  text-align: center;
}

#toggle-section {
  width: 100%;
}

#toggle-button {
  background: none;
  border: none;
  font-size: 1.2rem;
  font-family: "freight-text-pro", "Times", serif;
  cursor: pointer;
  padding: 0;
  width: 100%;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  color: var(--text-color);
  text-align: left;
}

.img-step img {
  filter: grayscale(100%);
  transition: filter 1s ease-out;
}

.img-step.active img {
  filter: grayscale(0%);
}

.hyperlinked {
  background: none;
  border: none;
  color: var(--text-color);
  text-decoration: underline;
  cursor: pointer;
  font-family: "freight-text-pro", "Times", serif;
  padding: 0;
}

p a {
  text-decoration: underline;
}

#toc {
  position: fixed;
  right: 12px;
  top: 6vh;
  z-index: 30;
  text-align: right;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  transition:
    opacity 220ms ease,
    transform 220ms ease;
}

#toc.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.toc-list {
  list-style: none;
}

.toc-list a {
  color: inherit;
  text-decoration: none;
  font-size: 0.85rem;
  opacity: 0.9;
}

.toc-list a:hover,
.toc-list button:hover {
  opacity: 1;
}

.toc-list a.active {
  font-weight: 700;
}

.toc-list button {
  background: var(--accent-color);
  border: none;
  color: var(--text-color);
  font-size: 1.2rem;
  text-align: left;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  border-radius: 0.25rem;
  margin-bottom: 1rem;
}

.toc-list button.active {
  font-weight: 700;
  background: var(--dark-color);
}