.project-page-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 30;
  min-height: 84px;
  padding: 1rem clamp(1.25rem, 4vw, 4.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s, min-height .3s;
}

.project-page-header.is-scrolled {
  min-height: 68px;
  background: rgba(247,245,241,.92);
  backdrop-filter: blur(16px);
  border-color: var(--line);
}

.project-back {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .65rem 0;
  border-bottom: 1px solid var(--ink);
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.project-back svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.project-back:focus-visible { outline: 3px solid var(--yellow); outline-offset: 4px; }
.project-main { padding-top: 84px; }
.project-cover { width: calc(100% - 2rem); max-width: 1120px; margin: 1.5rem auto 0; overflow: hidden; border-radius: var(--image-radius); background: #e7e4de; }
.project-cover img { display: block; width: 100%; height: auto; }
.project-intro { max-width: 1280px; margin: 0 auto; padding: clamp(3.5rem, 8vw, 8rem) clamp(1.25rem, 6vw, 6rem); }
.project-topline { display: flex; justify-content: space-between; gap: 2rem; text-transform: uppercase; letter-spacing: .08em; font-size: .68rem; font-weight: 700; }
.project-intro h1 { overflow-wrap: anywhere; margin: 1.5rem 0; font-size: clamp(3.7rem, 10vw, 9rem); line-height: .9; letter-spacing: -.065em; }
.project-lead { max-width: 820px; margin: 0; font-size: clamp(1.15rem, 2.2vw, 1.8rem); line-height: 1.5; }
.project-story-block { margin-top: clamp(3.5rem, 7vw, 6rem); padding-top: 2rem; display: grid; grid-template-columns: minmax(110px, .38fr) 1fr; gap: clamp(2rem, 5vw, 5rem); border-top: 1px solid var(--line); }
.project-section-label { font-size: .65rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
.project-story { max-width: 720px; }
.project-story p { margin: 0 0 1.35rem; font-size: clamp(1rem, 1.4vw, 1.15rem); line-height: 1.68; }
.project-story p:last-child { margin-bottom: 0; }
.project-tags { margin-top: 2.5rem; display: flex; flex-wrap: wrap; gap: .5rem; }
.project-tags span { border: 1px solid var(--ink); border-radius: 999px; padding: .45rem .7rem; font-size: .66rem; font-weight: 700; }
.project-gallery { max-width: 1200px; margin: 0 auto; padding: 0 clamp(1rem, 3vw, 2.5rem) clamp(2rem, 5vw, 5rem); display: grid; gap: clamp(.75rem, 1.6vw, 1.4rem); }
.project-gallery figure { margin: 0; overflow: hidden; border-radius: var(--image-radius); background: #e7e4de; }
.gallery-row { min-width: 0; }
.gallery-row--pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; background: transparent; align-items: start; }
.gallery-row--single { width: calc((100% - 12px) / 2); justify-self: center; }
.project-gallery figure[data-orientation="portrait"] { width: 100%; }
.project-gallery img { display: block; width: 100%; height: auto; }
.project-end { max-width: 1120px; margin: 0 auto; padding: 1.6rem clamp(1.25rem, 4vw, 4.5rem) 4rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; border-top: 1px solid var(--line); text-transform: uppercase; letter-spacing: .08em; font-size: .68rem; font-weight: 700; }
.project-end .project-back { text-transform: uppercase; }

@media (max-width: 780px) {
  .project-page-header { min-height: 70px; }
  .project-main { padding-top: 70px; }
  .project-story-block { grid-template-columns: 1fr; gap: 1rem; }
  .gallery-row--pair { grid-template-columns: 1fr; gap: 12px; }
  .gallery-row--single { width: 100%; }
}

@media (max-width: 540px) {
  .project-intro h1 { font-size: clamp(3.4rem, 18vw, 5.6rem); }
  .project-end { align-items: flex-start; flex-direction: column; }
}

.project-cover[data-orientation="portrait"] { max-width: 620px; }