/* =====================================================
   PROJECT PAGE — individual project detail layout
   ===================================================== */

/* ── Back nav ── */
.project-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: background var(--t-normal), box-shadow var(--t-normal);
}
.project-nav.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--glass-border);
}
.project-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.1rem 0.5rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--text-secondary);
  background: var(--glass-bg-light);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-full);
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: color 0.2s, background 0.2s, border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.back-btn:hover {
  color: var(--accent-2);
  border-color: var(--accent-2);
  background: rgba(233, 30, 140, 0.08);
  box-shadow: 0 0 12px rgba(233, 30, 140, 0.15);
  transform: translateX(-3px);
}
.back-btn i {
  font-size: 0.75rem;
  transition: transform 0.2s;
}
.back-btn:hover i {
  transform: translateX(-2px);
}

/* ── Project hero ── */
.project-hero {
  min-height: 420px;
  display: flex;
  align-items: flex-end;
  padding: 8rem 0 4rem;
  position: relative;
  overflow: hidden;
}
.project-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.project-hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 30%, var(--bg-primary) 100%);
}
.project-hero-content {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}
.project-hero-icon {
  width: 72px; height: 72px;
  border-radius: var(--r-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: #fff;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-lg);
}
.project-hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 1rem;
}
.project-hero-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.project-badge-lg {
  display: inline-block;
  padding: 0.35rem 1rem;
  border-radius: var(--r-full);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--glass-bg-light);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
}
.project-tagline {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.6;
  margin-top: 1rem;
}

/* ── Page body ── */
.project-body-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
}

/* ── Overview grid ── */
.project-overview {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3rem;
  margin-bottom: 4rem;
}
.project-description h2,
.project-screenshots h2,
.project-features h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}
.project-description p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1rem;
}

/* ── Sidebar ── */
.project-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.sidebar-card {
  padding: 1.25rem 1.5rem;
  border-radius: var(--r-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(var(--glass-blur));
}
.sidebar-card h4 {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.tech-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4rem 0;
  transition: color var(--t-fast);
}
.sidebar-link:hover { color: var(--accent-2); }
.sidebar-link i { width: 16px; }

/* ── Screenshots ── */
.project-screenshots {
  margin-bottom: 4rem;
}
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}
.screenshot-slot {
  aspect-ratio: 16/10;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
}
.screenshot-slot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: zoom-in;
  transition: transform 0.2s, opacity 0.2s;
}
.screenshot-slot img:hover {
  transform: scale(1.02);
  opacity: 0.9;
}

/* ── Lightbox ── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: rgba(0, 0, 0, 0.92);
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 90vw;
  max-height: 88vh;
  border-radius: var(--r-lg);
  box-shadow: 0 0 60px rgba(0,0,0,0.6);
  object-fit: contain;
  cursor: default;
}
.lightbox-close {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.75rem;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.15s;
  line-height: 1;
}
.lightbox-close:hover { opacity: 1; }
.screenshot-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.screenshot-placeholder i { font-size: 1.75rem; opacity: 0.4; }

/* ── Features ── */
.project-features {
  margin-bottom: 4rem;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}
.feature-card {
  padding: 1.5rem;
  border-radius: var(--r-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(var(--glass-blur));
}
.feature-icon {
  width: 44px; height: 44px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  margin-bottom: 1rem;
  background: var(--glass-bg-light);
  border: 1px solid var(--glass-border);
  color: var(--accent-2);
}
.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}
.feature-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── CTA ── */
.project-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 2rem;
  border-top: 1px solid var(--glass-border);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .project-overview { grid-template-columns: 1fr; }
  .project-sidebar { order: -1; flex-direction: row; flex-wrap: wrap; }
  .sidebar-card { flex: 1 1 200px; }
}