.project-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 200;
  height: var(--header-height);
  border-bottom: 1px solid var(--border-subtle);
  background: color-mix(in srgb, var(--bg) 96%, transparent);
}

[hidden] {
  display: none !important;
}

.project-header-inner,
.project-header-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.project-header-actions {
  gap: 12px;
}

.project-page {
  padding-top: var(--header-height);
}

.project-detail-hero {
  min-height: 760px;
  padding-block: 64px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.project-back {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  transition: color 180ms var(--ease);
}

.project-back:hover {
  color: var(--text);
}

.project-detail-grid {
  display: grid;
  grid-template-columns: 1fr;
  align-items: end;
  margin-top: 104px;
}

.project-detail-grid .eyebrow {
  margin-bottom: 20px;
}

.project-detail-grid h1 {
  margin: 0;
  font-size: clamp(64px, 10vw, 128px);
  font-weight: 500;
  letter-spacing: -0.07em;
  line-height: 0.9;
}

.project-detail-lead {
  max-width: 720px;
  margin: 40px 0 0;
  color: var(--text-secondary);
  font-size: 19px;
  line-height: 1.65;
}

.project-detail-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 48px;
  margin-top: 36px;
}

.project-private {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
}

.project-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 80px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.project-fact {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
}

.project-fact + .project-fact {
  border-left: 1px solid var(--border);
}

.project-fact span {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.project-fact strong {
  font-size: 15px;
  font-weight: 500;
}

.project-detail-section {
  padding-block: 128px;
  border-bottom: 1px solid var(--border-subtle);
}

.project-detail-section-grid {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 72px;
}

.project-detail-section h2 {
  margin: 0;
  font-size: clamp(34px, 4vw, 54px);
  font-weight: 500;
  letter-spacing: -0.05em;
}

.project-overview-copy {
  max-width: 760px;
  margin: 0;
  color: var(--text-secondary);
  font-size: clamp(21px, 2.4vw, 30px);
  line-height: 1.5;
}

.capability-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
}

.capability {
  min-height: 168px;
  padding: 24px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.capability strong {
  display: block;
  margin-bottom: 48px;
  font-size: 17px;
  font-weight: 500;
}

.capability span {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 9px;
  line-height: 1.6;
}

.architecture-heading > div {
  grid-column: 1;
}

.project-pipeline {
  display: grid;
  grid-template-columns: repeat(9, auto);
  align-items: center;
  margin-top: 72px;
}

.pipeline-node {
  display: grid;
  place-items: center;
  min-height: 104px;
  padding: 16px;
  border: 2px solid var(--border);
  border-top: 4px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 10px;
  text-align: center;
}

.pipeline-link {
  position: relative;
  justify-self: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
}

.pipeline-link::before {
  position: absolute;
  top: 11px;
  left: 10px;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  border-radius: 1px;
  content: "";
  transform: rotate(-45deg);
}

.project-related-section {
  padding-block: 64px;
}

.project-related {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 180px;
  padding: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.project-related > div {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.project-related > div span {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.project-related strong {
  font-size: 30px;
  font-weight: 500;
  letter-spacing: -0.04em;
}

.project-related > a {
  display: inline-flex;
  align-items: center;
  gap: 20px;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.project-related > a:hover {
  border-color: var(--border-strong);
  background: var(--bg-soft);
}

@media (max-width: 820px) {
  .project-detail-hero {
    min-height: auto;
    padding-bottom: 64px;
  }

  .project-detail-grid {
    grid-template-columns: 1fr;
    margin-top: 72px;
  }

  .project-facts {
    grid-template-columns: 1fr;
    margin-top: 64px;
  }

  .project-fact + .project-fact {
    border-top: 1px solid var(--border);
    border-left: 0;
  }

  .project-detail-section {
    padding-block: 88px;
  }

  .project-detail-section-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .project-pipeline {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .pipeline-link {
    width: 36px;
    height: 36px;
  }

  .pipeline-link::before {
    top: 10px;
    left: 12px;
    transform: rotate(45deg);
  }
}

@media (max-width: 600px) {
  .project-header .brand-wordmark {
    display: none;
  }

  .project-header .language-trigger {
    min-width: 68px;
  }

  .project-header .language-menu {
    position: fixed;
    top: calc(var(--header-height) + 8px);
    right: 16px;
    width: calc(100vw - 32px);
  }

  .project-detail-hero {
    padding-top: 48px;
  }

  .project-detail-grid h1 {
    font-size: 52px;
    overflow-wrap: anywhere;
  }

  .project-detail-lead {
    font-size: 17px;
  }

  .project-detail-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .capability-grid {
    grid-template-columns: 1fr;
  }

  .project-related {
    align-items: flex-start;
    flex-direction: column;
    gap: 40px;
    padding: 28px;
  }
}