/* ============================================
   SUBPAGES — Layout & Navigation Header
   ============================================ */

.subpage-nav {
  position: sticky;
  top: 0;
  z-index: 900;
  background: rgba(253, 253, 253, 0.9);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: var(--border-thick);
  padding: 1rem 0;
}

.subpage-nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.back-home-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-primary);
  text-decoration: none;
  background: var(--bg-primary);
  border: var(--border-thick);
  border-radius: 50px;
  padding: 0.5rem 1.25rem;
  box-shadow: var(--shadow-brutal-hover);
  transition: all var(--transition-fast);
}

.back-home-btn:hover {
  background: var(--accent-green);
  color: #fff;
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0px 0px var(--text-primary);
}

.subpage-hero {
  padding: 4rem 0 3rem 0;
  position: relative;
}

.subpage-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-green);
  background: var(--bg-secondary);
  border: 2px solid var(--accent-green);
  border-radius: 50px;
  padding: 0.3rem 0.9rem;
  margin-bottom: 1rem;
}

.subpage-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.subpage-subtitle {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 500;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 700px;
}

/* Content Blocks */
.subpage-content {
  padding: 2rem 0 6rem 0;
}

.content-block {
  background: var(--bg-primary);
  border: var(--border-thick);
  border-radius: 16px;
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-brutal);
  margin-bottom: 2.5rem;
}

.block-title {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3.5vw, 1.8rem);
  font-weight: 900;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.block-text {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.bullet-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.bullet-item {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.6;
}

.bullet-item::before {
  content: '✦';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-green);
  font-size: 0.9rem;
}

/* Page Transition Overlay */
.curtain-overlay {
  position: fixed;
  inset: 0;
  z-index: 999999;
  background: var(--accent-green);
  transform: translateY(100%);
  pointer-events: none;
}

.curtain-overlay.active {
  transition: transform 0.6s cubic-bezier(0.7, 0, 0.3, 1);
  transform: translateY(0);
}

/* Helpers */
.content-block-centered {
  text-align: center;
  padding: 4rem 2rem;
}

.block-title-sm-mb {
  margin-bottom: 1rem;
}

.block-text-centered-narrow {
  max-width: 500px;
  margin: 0 auto;
}

.asset-desc-spaced {
  margin-top: 0.5rem;
}

.screenshot-margin {
  margin: 2rem 0;
}

@media (min-width: 768px) {
  .content-block {
    padding: 3rem;
  }
}