/* ── Project detail page ── */
.project-detail-hero {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.project-detail-hero .page-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
  transition: transform 200ms ease, background 200ms ease, color 200ms ease;
}

.project-detail-hero .page-back:hover {
  transform: translateY(-2px);
  background: white;
  color: var(--text);
}

.project-detail-hero .tags {
  margin-top: 10px;
}

.project-detail-hero h1 {
  margin-bottom: 18px;
  font-size: clamp(2.4rem, 5.5vw, 4.6rem);
  line-height: 0.92;
}

.project-detail-hero .project-lead {
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
  line-height: 1.55;
  margin-bottom: 0;
}

.project-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 28px 0 0;
}

.project-detail-actions .button {
  gap: 8px;
  font-size: 0.92rem;
  padding: 0 22px;
}

.project-detail-actions .button i {
  font-size: 0.95em;
}

.project-detail-cover img {
  display: block;
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: 30px;
  box-shadow: var(--shadow);
  background: var(--surface);
}

/* Body layout */
.project-detail-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 56px;
  padding: 32px 0 104px;
  align-items: start;
}

.project-article {
  min-width: 0;
}

.project-sidebar {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sidebar-card {
  padding: 22px 22px 20px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.68);
  box-shadow: var(--shadow-soft);
}

.sidebar-card h3 {
  margin: 0 0 14px;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Tech list */
.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tech-list li {
  padding: 6px 11px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.8rem;
  font-weight: 700;
}

/* Meta dl */
.meta-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
}

.meta-list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(232, 230, 225, 0.9);
  font-size: 0.9rem;
}

.meta-list > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.meta-list dt {
  color: var(--muted);
  font-weight: 600;
}

.meta-list dd {
  margin: 0;
  color: var(--text);
  font-weight: 700;
  text-align: right;
}

/* Sidebar link list */
.link-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.link-list a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  color: var(--text);
  font-weight: 600;
  font-size: 0.92rem;
  transition: color 180ms ease, transform 180ms ease;
}

.link-list a:hover {
  color: var(--accent-strong);
  transform: translateX(2px);
}

.link-list a i {
  color: var(--muted);
  font-size: 0.95em;
  width: 18px;
  text-align: center;
}

.link-list a:hover i {
  color: var(--accent-strong);
}

/* Prose — article typography */
.prose {
  max-width: 720px;
  color: var(--text);
  font-size: 1.04rem;
  line-height: 1.7;
}

.prose > *:first-child {
  margin-top: 0;
}

.prose > *:last-child {
  margin-bottom: 0;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  margin: 1.8em 0 0.6em;
  letter-spacing: -0.035em;
  line-height: 1.2;
  color: var(--text);
}

.prose h1 { font-size: clamp(1.9rem, 3.4vw, 2.4rem); }
.prose h2 { font-size: clamp(1.55rem, 2.6vw, 1.95rem); }
.prose h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
.prose h4 { font-size: 1.1rem; }

.prose h2 + p,
.prose h3 + p,
.prose h4 + p {
  margin-top: 0;
}

.prose p {
  margin: 0 0 1.1em;
}

.prose a {
  color: var(--accent-strong);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  transition: color 160ms ease;
}

.prose a:hover {
  color: var(--text);
}

.prose strong { color: var(--text); font-weight: 700; }
.prose em { font-family: "Instrument Serif", serif; font-style: italic; }

.prose ul,
.prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.4em;
}

.prose li {
  margin-bottom: 0.4em;
}

.prose li::marker {
  color: var(--accent);
}

.prose blockquote {
  margin: 1.6em 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--accent);
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: 1.15rem;
  color: var(--muted);
}

.prose blockquote p {
  margin: 0;
}

.prose code {
  padding: 2px 7px;
  border-radius: 6px;
  background: rgba(31, 41, 55, 0.06);
  font-family: "Geist Mono", "SF Mono", Menlo, monospace;
  font-size: 0.88em;
  color: var(--text);
}

.prose pre {
  margin: 1.4em 0;
  padding: 18px 20px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(31, 41, 55, 0.04);
  font-family: "Geist Mono", "SF Mono", Menlo, monospace;
  font-size: 0.88rem;
  line-height: 1.55;
}

.prose pre code {
  padding: 0;
  background: transparent;
  font-size: inherit;
  color: inherit;
}

.prose img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.6em auto;
  border-radius: 20px;
  border: 1px solid var(--border);
}

.prose figure {
  margin: 1.6em 0;
}

.prose figcaption {
  margin-top: 10px;
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
}

.prose hr {
  margin: 2.4em auto;
  width: 60%;
  border: 0;
  border-top: 1px dashed rgba(232, 230, 225, 0.9);
}

.prose table {
  width: 100%;
  margin: 1.4em 0;
  border-collapse: collapse;
  font-size: 0.94rem;
}

.prose th,
.prose td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.prose th {
  font-weight: 700;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.prose-empty {
  color: var(--muted);
  font-style: italic;
}

/* 404 */
.project-not-found {
  padding: 80px 0 120px;
  text-align: center;
}

.project-not-found .page-back {
  margin-bottom: 28px;
}

.project-not-found h1 {
  margin-inline: auto;
  font-size: clamp(2.4rem, 5vw, 4rem);
}

.project-not-found .project-lead {
  margin-inline: auto;
  margin-bottom: 32px;
}

.project-not-found .hero-actions {
  justify-content: center;
}

:root[data-theme="dark"] .project-detail-hero .page-back,
:root[data-theme="dark"] .sidebar-card {
  border-color: var(--border);
  background: rgba(22, 27, 34, 0.78);
}

:root[data-theme="dark"] .project-detail-hero .page-back:hover {
  background: rgba(28, 33, 40, 0.92);
}

:root[data-theme="dark"] .meta-list > div,
:root[data-theme="dark"] .prose hr {
  border-color: rgba(45, 51, 59, 0.92);
}

:root[data-theme="dark"] .prose code {
  background: rgba(139, 148, 158, 0.12);
}

:root[data-theme="dark"] .prose pre {
  background: rgba(22, 27, 34, 0.78);
}

/* Responsive */
@media (max-width: 960px) {
  .project-detail-body {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .project-sidebar {
    position: static;
  }

  .sidebar-card {
    flex: 0 0 auto;
  }
}

@media (max-width: 600px) {
  .project-detail-hero {
    padding: 40px 0 24px;
  }

  .project-detail-cover {
    padding-top: 28px;
  }

  .project-detail-actions {
    padding-top: 20px;
  }

  .project-detail-body {
    padding: 36px 0 72px;
  }

  .project-detail-actions {
    width: 100%;
  }

  .project-detail-actions .button {
    flex: 1;
    justify-content: center;
  }

  .project-sidebar {
    flex-direction: column;
  }
}