@charset "UTF-8";

.eras-page {
  background-color: var(--color-paper);
  position: relative;
}

.eras-page::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120' viewBox='0 0 120 120'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23noise)' opacity='0.6'/%3E%3C/svg%3E");
  z-index: 0;
}

.eras-page > * {
  position: relative;
  z-index: 1;
}

/* Eras Introduction */
.eras-intro {
  display: grid;
  grid-template-columns: minmax(0, 40%) minmax(0, 60%);
  gap: var(--space-lg);
  align-items: start;
  padding-block: var(--space-3xl) var(--space-2xl);
  padding-inline: var(--container-gutter);
  max-width: var(--container-max);
  margin-inline: auto;
  width: 100%;
}

.eras-intro__year-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-width: 0;
}

.eras-intro__year-block .year-numeral {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  line-height: 1;
  color: var(--color-brass);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.eras-intro__year-block .timeline-tick {
  width: 100%;
  max-width: 200px;
}

.eras-intro__content {
  min-width: 0;
}

.eras-intro__content h1 {
  margin-block-end: var(--space-md);
}

.eras-intro__lead {
  font-size: var(--text-body-large-size);
  line-height: var(--text-body-large-line-height);
  max-width: 65ch;
  margin-block-end: var(--space-md);
}

.eras-intro__content > p:not(.eras-intro__lead) {
  max-width: 65ch;
  margin-block-end: var(--space-md);
}

.eras-intro__method {
  margin-block-start: var(--space-lg);
  padding-block-start: var(--space-md);
  border-block-start: 2px solid var(--color-brass);
}

.eras-intro__method p {
  max-width: 65ch;
  margin-block-end: 0;
}

.eras-intro__filmstrip {
  grid-column: 1 / -1;
  display: flex;
  gap: var(--space-2xs);
  align-items: center;
  padding-block-start: var(--space-md);
  border-block-start: var(--border-hairline);
  min-width: 0;
}

.filmstrip-tick {
  flex: 1 1 0;
  height: 10px;
  border-inline: 1px solid var(--color-sepia-30);
  background-color: var(--color-paper-dark);
  min-width: 0;
}

/* Era Navigation */
.era-nav {
  position: relative;
  padding-block: var(--space-lg);
  padding-inline: var(--container-gutter);
  max-width: var(--container-max);
  margin-inline: auto;
  width: 100%;
}

.era-nav__track {
  position: absolute;
  top: 50%;
  left: var(--container-gutter);
  right: var(--container-gutter);
  height: 2px;
  background-color: var(--color-brass);
  transform: translateY(-50%);
  z-index: 0;
}

.era-nav__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: var(--space-sm);
  position: relative;
  z-index: 1;
}

.era-nav__list li {
  min-width: 0;
}

.era-nav__list .era-chip {
  width: 100%;
  flex-direction: column;
  gap: var(--space-3xs);
  padding: var(--space-xs) var(--space-sm);
  min-height: 64px;
  text-align: center;
  border: var(--border-hairline);
  border-radius: var(--radius-sm);
  background-color: var(--color-paper);
}

.era-nav__list .era-chip:hover {
  border-color: var(--color-brass);
  text-decoration: none;
}

.era-nav__list .era-chip:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
}

.era-chip__year {
  font-family: var(--font-year);
  font-size: 1.25rem;
  line-height: 1;
  font-weight: 500;
  color: var(--color-ink);
  letter-spacing: 0.02em;
}

.era-chip__label {
  font-family: var(--font-body);
  font-size: var(--text-caption-size);
  line-height: var(--text-caption-line-height);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-sepia);
}

.era-nav__list .era-chip:hover .era-chip__year,
.era-nav__list .era-chip:hover .era-chip__label {
  color: var(--color-ink);
}

/* Era Sections */
.era-section {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: var(--space-lg);
  padding-block: var(--space-3xl);
  padding-inline: var(--container-gutter);
  max-width: var(--container-max);
  margin-inline: auto;
  width: 100%;
  border-block-start: var(--border-hairline);
}

.era-section__year {
  font-family: var(--font-year);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  line-height: 1;
  font-weight: 500;
  color: var(--color-brass);
  letter-spacing: 0.02em;
  white-space: nowrap;
  align-self: start;
}

.era-section__content {
  min-width: 0;
}

.era-section__content h2 {
  margin-block-end: var(--space-md);
}

.era-section__content h3 {
  margin-block-start: var(--space-lg);
  margin-block-end: var(--space-sm);
}

.era-section__content p {
  max-width: 65ch;
  margin-block-end: var(--space-md);
}

.era-section__film-list {
  list-style: none;
  padding: 0;
  margin-block-end: var(--space-lg);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm);
}

.era-section__film-list li {
  min-width: 0;
  padding: var(--space-sm);
  border: var(--border-hairline);
  border-radius: var(--radius-sm);
  background-color: var(--color-paper);
  font-size: var(--text-small-size);
  line-height: var(--text-small-line-height);
}

.era-section__observation {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: var(--text-h3-size);
  line-height: var(--text-h3-line-height);
  color: var(--color-sepia);
  margin-block-start: var(--space-lg);
  margin-block-end: 0;
  padding-inline-start: var(--space-md);
  padding-block-start: var(--space-md);
  border-inline-start: none;
  border-block-start: 2px solid var(--color-brass);
  max-width: 65ch;
}

.era-section__media {
  min-width: 0;
}

.era-section__media--filmstrip {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  align-content: start;
}

.era-section__media--filmstrip .film-frame {
  width: 100%;
  max-width: 250px;
  justify-self: end;
}

.era-section__media--filmstrip-centered {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-md);
  justify-items: center;
  align-items: start;
}

.era-section__media--filmstrip-centered .film-frame {
  width: 100%;
  max-width: 200px;
}

.era-section__media--single {
  display: grid;
  justify-items: start;
  align-content: start;
}

.era-section__media--single .film-frame {
  width: 100%;
  max-width: 300px;
}

.era-section__media--single-centered {
  display: grid;
  justify-items: center;
  align-content: start;
}

.era-section__media--single-centered .film-frame {
  width: 100%;
  max-width: 300px;
}

.era-section__media--single-small {
  display: grid;
  justify-items: end;
  align-content: start;
}

.era-section__media--single-small .film-frame {
  width: 100%;
  max-width: 200px;
}

.era-section .film-frame {
  border: 1px solid var(--color-sepia-30);
  border-radius: var(--radius-none);
  overflow: hidden;
  position: relative;
  transition: box-shadow var(--transition-medium), filter var(--transition-medium);
}

.era-section .film-frame img {
  display: block;
  width: 100%;
  height: auto;
  border: none;
  filter: saturate(0.75);
  transition: filter var(--transition-medium);
}

.era-section .film-frame:hover {
  box-shadow: var(--shadow-card);
}

.era-section .film-frame:hover img {
  filter: saturate(1);
}

.era-section .film-frame figcaption {
  margin-block-start: var(--space-2xs);
  padding-inline: var(--space-2xs);
  text-align: start;
}

/* Specific layout adjustments */
.era-section--1960s {
  grid-template-columns: 120px minmax(0, 7fr) minmax(0, 5fr);
}

.era-section--1960s .era-section__year {
  grid-column: 1;
  grid-row: 1;
}

.era-section--1960s .era-section__content {
  grid-column: 2;
  grid-row: 1;
}

.era-section--1960s .era-section__media {
  grid-column: 3;
  grid-row: 1;
}

.era-section--1970s {
  grid-template-columns: 120px minmax(0, 5fr) minmax(0, 7fr);
}

.era-section--1970s .era-section__year {
  grid-column: 1;
  grid-row: 1;
}

.era-section--1970s .era-section__media {
  grid-column: 2;
  grid-row: 1;
}

.era-section--1970s .era-section__content {
  grid-column: 3;
  grid-row: 1;
}

.era-section--1980s {
  grid-template-columns: 120px minmax(0, 1fr);
}

.era-section--1980s .era-section__year {
  grid-column: 1;
  grid-row: 1;
}

.era-section--1980s .era-section__content {
  grid-column: 2;
  grid-row: 1;
}

.era-section--1980s .era-section__media {
  grid-column: 2;
  grid-row: 2;
  margin-block-start: var(--space-lg);
}

.era-section--1980s .era-section__content--centered {
  text-align: center;
  max-width: 65ch;
  margin-inline: auto;
}

.era-section--1980s .era-section__content--centered p,
.era-section--1980s .era-section__content--centered .era-section__film-list,
.era-section--1980s .era-section__content--centered .era-section__observation {
  margin-inline: auto;
}

.era-section--1980s .era-section__content--centered .era-section__film-list {
  text-align: start;
}

.era-section--1990s {
  grid-template-columns: 120px minmax(0, 7fr) minmax(0, 5fr);
}

.era-section--1990s .era-section__year {
  grid-column: 1;
  grid-row: 1;
}

.era-section--1990s .era-section__content {
  grid-column: 2;
  grid-row: 1;
}

.era-section--1990s .era-section__media {
  grid-column: 3;
  grid-row: 1;
}

.era-section--2000s {
  grid-template-columns: 120px minmax(0, 5fr) minmax(0, 7fr);
}

.era-section--2000s .era-section__year {
  grid-column: 1;
  grid-row: 1;
}

.era-section--2000s .era-section__media {
  grid-column: 2;
  grid-row: 1;
}

.era-section--2000s .era-section__content {
  grid-column: 3;
  grid-row: 1;
}

.era-section--2010s {
  grid-template-columns: 120px minmax(0, 1fr);
}

.era-section--2010s .era-section__year {
  grid-column: 1;
  grid-row: 1;
}

.era-section--2010s .era-section__content {
  grid-column: 2;
  grid-row: 1;
}

.era-section--2010s .era-section__media {
  grid-column: 2;
  grid-row: 2;
  margin-block-start: var(--space-lg);
}

.era-section--2010s .era-section__content--centered {
  text-align: center;
  max-width: 65ch;
  margin-inline: auto;
}

.era-section--2010s .era-section__content--centered p,
.era-section--2010s .era-section__content--centered .era-section__film-list,
.era-section--2010s .era-section__content--centered .era-section__observation {
  margin-inline: auto;
}

.era-section--2010s .era-section__content--centered .era-section__film-list {
  text-align: start;
}

.era-section--2020s {
  grid-template-columns: 120px minmax(0, 8fr) minmax(0, 4fr);
}

.era-section--2020s .era-section__year {
  grid-column: 1;
  grid-row: 1;
}

.era-section--2020s .era-section__content {
  grid-column: 2;
  grid-row: 1;
}

.era-section--2020s .era-section__media {
  grid-column: 3;
  grid-row: 1;
}

/* Using the Archive */
.using-archive {
  padding-block: var(--space-3xl);
  padding-inline: var(--container-gutter);
  max-width: var(--container-max);
  margin-inline: auto;
  width: 100%;
  border-block-start: var(--border-hairline);
}

.using-archive h2 {
  margin-block-end: var(--space-md);
}

.using-archive p {
  max-width: 65ch;
  margin-block-end: 0;
  padding-block-start: var(--space-md);
  border-block-start: 2px solid var(--color-brass);
}

/* Tablet and intermediate breakpoints */
@media (max-width: 1024px) {
  .eras-intro {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .eras-intro__year-block {
    flex-direction: row;
    align-items: center;
    gap: var(--space-md);
  }

  .eras-intro__year-block .timeline-tick {
    max-width: 120px;
  }

  .era-nav__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .era-section {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .era-section__year {
    grid-column: 1;
    grid-row: auto;
    white-space: normal;
  }

  .era-section__content,
  .era-section__media {
    grid-column: 1;
    grid-row: auto;
  }

  .era-section--1960s,
  .era-section--1970s,
  .era-section--1990s,
  .era-section--2000s,
  .era-section--2020s {
    grid-template-columns: 1fr;
  }

  .era-section--1960s .era-section__year,
  .era-section--1960s .era-section__content,
  .era-section--1960s .era-section__media,
  .era-section--1970s .era-section__year,
  .era-section--1970s .era-section__media,
  .era-section--1970s .era-section__content,
  .era-section--1990s .era-section__year,
  .era-section--1990s .era-section__content,
  .era-section--1990s .era-section__media,
  .era-section--2000s .era-section__year,
  .era-section--2000s .era-section__media,
  .era-section--2000s .era-section__content,
  .era-section--2020s .era-section__year,
  .era-section--2020s .era-section__content,
  .era-section--2020s .era-section__media {
    grid-column: 1;
    grid-row: auto;
  }

  .era-section__media--filmstrip .film-frame,
  .era-section__media--filmstrip-centered .film-frame,
  .era-section__media--single .film-frame,
  .era-section__media--single-centered .film-frame,
  .era-section__media--single-small .film-frame {
    max-width: 100%;
    justify-self: stretch;
  }

  .era-section__media--filmstrip-centered {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .eras-intro {
    padding-block: var(--space-2xl) var(--space-xl);
  }

  .eras-intro__year-block {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }

  .eras-intro__year-block .timeline-tick {
    max-width: 100%;
  }

  .era-nav {
    padding-block: var(--space-md);
  }

  .era-nav__track {
    display: none;
  }

  .era-nav__list {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }

  .era-nav__list .era-chip {
    flex-direction: row;
    justify-content: flex-start;
    gap: var(--space-sm);
    min-height: 44px;
    padding: var(--space-xs) var(--space-sm);
    text-align: start;
  }

  .era-chip__year {
    font-size: 1rem;
  }

  .era-chip__label {
    font-size: var(--text-small-size);
  }

  .era-section {
    padding-block: var(--space-2xl);
    gap: var(--space-md);
  }

  .era-section__film-list {
    grid-template-columns: 1fr;
  }

  .era-section__observation {
    font-size: 1.25rem;
    line-height: 1.3;
  }

  .era-section--1980s .era-section__content--centered,
  .era-section--2010s .era-section__content--centered {
    text-align: start;
    max-width: none;
    margin-inline: 0;
  }

  .era-section--1980s .era-section__content--centered p,
  .era-section--1980s .era-section__content--centered .era-section__film-list,
  .era-section--1980s .era-section__content--centered .era-section__observation,
  .era-section--2010s .era-section__content--centered p,
  .era-section--2010s .era-section__content--centered .era-section__film-list,
  .era-section--2010s .era-section__content--centered .era-section__observation {
    margin-inline: 0;
  }
}

@media (max-width: 480px) {
  .eras-intro {
    padding-block: var(--space-xl);
  }

  .eras-intro__year-block .year-numeral {
    font-size: 2rem;
  }

  .era-section {
    padding-block: var(--space-xl);
  }

  .era-section__year {
    font-size: 2rem;
  }

  .era-section__content h2 {
    font-size: 1.75rem;
  }

  .era-section__content h3 {
    font-size: 1.25rem;
  }

  .era-section__observation {
    font-size: 1.125rem;
  }

  .using-archive {
    padding-block: var(--space-xl);
  }
}

@media (prefers-reduced-motion: reduce) {
  .era-section .film-frame,
  .era-section .film-frame img {
    transition: none;
  }
}