.page-about {
  --page-accent-glow: #06D6A0;
  --page-quote-color: #E63946;
  --page-tech-bg: #1A1A1A;
  --page-tech-text: #F5F0E8;
  --page-timeline-width: 3px;
  --page-dot-size: 20px;
  --page-sidebar-width: 300px;
  display: block;
  background-color: var(--cream-bg);
  color: var(--text-primary);
  font-family: var(--body-font);
}

/* Banner */
.page-about__banner {
  width: 100%;
  overflow: hidden;
  background-color: var(--dark-brown);
  line-height: 0;
}
.page-about__banner-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 300px;
  object-fit: cover;
  object-position: center 30%;
}

/* Breadcrumb via shared classes */

/* Intro */
.page-about__intro {
  padding: var(--space-lg) 0 var(--space-md);
  border-bottom: 2px solid var(--border-light);
  margin-bottom: var(--space-lg);
}
.page-about__heading {
  font-family: var(--heading-font);
  font-size: 2.5rem;
  line-height: 1;
  color: var(--dark-brown);
  margin: 0 0 var(--space-xs);
  text-transform: uppercase;
  letter-spacing: -0.02em;
}
.page-about__subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin: 0;
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* Layout: two columns */
.page-about__layout {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
}
.page-about__content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.page-about__sidebar {
  width: 100%;
  border-top: 2px solid var(--border-light);
  padding-top: var(--space-lg);
}

/* Sections */
.page-about__section {
  padding: var(--space-md);
  border-radius: 4px;
}
.page-about__section--position {
  background-color: #EDE8DD;
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  padding: var(--space-md) var(--space-lg);
}
.page-about__section--tech {
  background-color: var(--page-tech-bg);
  color: var(--page-tech-text);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: 0;
  overflow: hidden;
  border-radius: 4px;
}
.page-about__section--philosophy {
  background-color: #EDE8DD;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: 0;
  overflow: hidden;
  border-radius: 4px;
}
.page-about__section-title {
  font-family: var(--heading-font);
  font-size: 1.75rem;
  line-height: 1.1;
  color: inherit;
  margin: 0 0 var(--space-sm);
  text-transform: uppercase;
  letter-spacing: -0.01em;
}
.page-about__section--position .page-about__section-title {
  color: var(--dark-brown);
}
.page-about__section--tech .page-about__section-title {
  color: var(--accent-orange);
}
.page-about__section--philosophy .page-about__section-title {
  color: var(--accent-red);
}
.page-about__text {
  font-size: 1rem;
  line-height: 1.6;
  margin: 0 0 var(--space-sm);
  max-width: 68ch;
}
.page-about__text:last-child {
  margin-bottom: 0;
}
.page-about__em {
  color: var(--accent-red);
  font-weight: 600;
}
.page-about__section--tech .page-about__em {
  color: var(--accent-orange);
}
.page-about__link {
  color: var(--accent-red);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
  transition: color 0.2s;
}
.page-about__link:hover,
.page-about__link:focus-visible {
  color: var(--dark-brown);
}

/* Tech section internals */
.page-about__tech-img-wrap {
  width: 100%;
  line-height: 0;
  overflow: hidden;
}
.page-about__tech-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 260px;
  object-fit: cover;
  object-position: center 40%;
}
.page-about__tech-body {
  padding: 0 var(--space-md) var(--space-md);
}

/* Philosophy section internals */
.page-about__phil-img-wrap {
  width: 100%;
  line-height: 0;
  overflow: hidden;
}
.page-about__phil-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 220px;
  object-fit: cover;
  object-position: center;
}
.page-about__phil-body {
  padding: 0 var(--space-md) var(--space-md);
}

/* Sidebar */
.page-about__quote {
  margin: 0 0 var(--space-lg);
  padding: 0;
  border: none;
  position: relative;
}
.page-about__quote-text {
  font-family: var(--heading-font);
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--page-quote-color);
  margin: 0 0 var(--space-sm);
  text-transform: uppercase;
  letter-spacing: -0.01em;
  quotes: none;
}
.page-about__quote-text::before {
  content: "“";
  display: inline;
}
.page-about__quote-text::after {
  content: "”";
  display: inline;
}
.page-about__quote-footer {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-style: normal;
}

/* Timeline */
.page-about__timeline-wrap {
  position: relative;
  padding-left: calc(var(--page-dot-size) + var(--space-md));
  min-height: 240px;
}
.page-about__timeline-line {
  position: absolute;
  left: calc(var(--page-dot-size) / 2);
  top: 0;
  bottom: 0;
  width: var(--page-timeline-width);
  background: linear-gradient(to bottom, transparent 0%, var(--accent-red) 15%, var(--accent-red) 55%, transparent 55%);
  border-radius: 2px;
}
.page-about__timeline-node {
  position: relative;
  margin-bottom: var(--space-md);
}
.page-about__timeline-marker {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  user-select: none;
  padding: var(--space-xs) 0;
  transition: opacity 0.2s;
}
.page-about__timeline-marker:hover,
.page-about__timeline-marker:focus-visible {
  opacity: 0.85;
}
.page-about__timeline-dot {
  position: absolute;
  left: calc(-1 * (var(--page-dot-size) / 2 + var(--space-md)));
  top: 50%;
  transform: translateY(-50%);
  width: var(--page-dot-size);
  height: var(--page-dot-size);
  border-radius: 50%;
  background-color: var(--accent-red);
  border: 3px solid var(--cream-bg);
  box-shadow: 0 0 0 3px var(--accent-red);
  flex-shrink: 0;
}
.page-about__timeline-label {
  font-family: var(--heading-font);
  font-size: 1rem;
  color: var(--accent-red);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.page-about__timeline-details {
  margin-left: 0;
}
.page-about__timeline-summary {
  font-family: var(--heading-font);
  font-size: 1.125rem;
  color: var(--dark-brown);
  cursor: pointer;
  padding: var(--space-xs) 0;
  list-style: none;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  transition: color 0.2s;
}
.page-about__timeline-summary::-webkit-details-marker {
  display: none;
}
.page-about__timeline-summary::before {
  content: "+ ";
  color: var(--accent-red);
  font-weight: 700;
  font-size: 1.25rem;
}
details[open] .page-about__timeline-summary::before {
  content: "− ";
}
.page-about__timeline-summary:hover {
  color: var(--accent-red);
}
.page-about__timeline-body {
  padding: var(--space-sm) 0 0;
  margin-top: var(--space-xs);
  border-top: 1px solid var(--border-light);
}
.page-about__timeline-text {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0 0 var(--space-sm);
}
.page-about__timeline-text:last-child {
  margin-bottom: 0;
}

/* Desktop */
@media (min-width: 860px) {
  .page-about__layout {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-xl);
  }
  .page-about__content {
    flex: 1 1 calc(100% - var(--page-sidebar-width) - var(--space-xl));
  }
  .page-about__sidebar {
    width: var(--page-sidebar-width);
    flex: 0 0 var(--page-sidebar-width);
    border-top: none;
    padding-top: 0;
    position: sticky;
    top: calc(var(--header-height-desktop) + var(--space-md));
  }
  .page-about__section--tech {
    flex-direction: row;
  }
  .page-about__tech-img-wrap {
    width: 45%;
    flex-shrink: 0;
  }
  .page-about__tech-img {
    max-height: 300px;
    height: 100%;
    object-fit: cover;
  }
  .page-about__tech-body {
    padding: var(--space-md);
    flex: 1;
  }
  .page-about__section--philosophy {
    flex-direction: row-reverse;
  }
  .page-about__phil-img-wrap {
    width: 35%;
    flex-shrink: 0;
  }
  .page-about__phil-img {
    max-height: 280px;
    height: 100%;
    object-fit: cover;
  }
  .page-about__phil-body {
    padding: var(--space-md);
    flex: 1;
  }
  .page-about__timeline-line {
    background: linear-gradient(to bottom, transparent 0%, var(--accent-red) 10%, var(--accent-red) 60%, transparent 60%);
  }
  .page-about__quote-text {
    font-size: 1.75rem;
  }
}

/* Large desktop */
@media (min-width: 1100px) {
  .page-about__heading {
    font-size: 3rem;
  }
  .page-about__section--position {
    padding: var(--space-lg) var(--space-xl);
  }
  .page-about__quote-text {
    font-size: 2rem;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .page-about__timeline-marker,
  .page-about__link,
  .page-about__timeline-summary {
    transition: none;
  }
}