/* ============================================================
   layout.css — Grid, Flex, Sections & Page Structure
   The OT Land Web | NandoCraft
   ============================================================ */

/* ── App Shell ───────────────────────────────────────────── */
#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Navigation ──────────────────────────────────────────── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 60px;
  display: flex;
  align-items: center;
  padding: 0 var(--sp-xl);
  background: rgba(5, 6, 8, 0.85);
  backdrop-filter: blur(12px) saturate(160%);
  border-bottom: 1px solid var(--clr-border-dim);
  transition: border-color var(--dur-mid) var(--ease-out);
}

#nav.scrolled {
  border-bottom-color: var(--clr-border);
  background: rgba(5, 6, 8, 0.95);
}

.nav-inner {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-lg);
}

.nav-logo {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
}

/* ── Main Content ────────────────────────────────────────── */
#main {
  flex: 1;
  padding-top: 60px;
}

/* ── Page Sections ───────────────────────────────────────── */
.page {
  display: none;
  animation: pageFadeIn var(--dur-slow) var(--ease-out) forwards;
}

.page.active {
  display: block;
}

@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Section Wrapper ─────────────────────────────────────── */
.section {
  padding: var(--sp-3xl) var(--sp-xl);
  position: relative;
}

.section-inner {
  max-width: 1300px;
  margin: 0 auto;
}

/* ── Section Label / Eyebrow ─────────────────────────────── */
.section-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  color: var(--clr-phosphor);
  text-transform: uppercase;
  margin-bottom: var(--sp-md);
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
}

.section-label::after {
  content: '';
  display: block;
  width: 60px;
  height: 1px;
  background: var(--clr-phosphor);
  opacity: 0.4;
}

/* ── Section Title ───────────────────────────────────────── */
.section-title {
  font-family: 'Press Start 2P', monospace;
  font-weight: 400;
  font-size: clamp(1rem, 3vw, 1.8rem);
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--clr-text-primary);
  margin-bottom: var(--sp-md);
  image-rendering: pixelated;
}

.section-subtitle {
  font-size: var(--fs-lg);
  color: var(--clr-text-secondary);
  max-width: 680px;
  line-height: 1.6;
}

/* ── Hero Layout ─────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: var(--sp-3xl) var(--sp-xl);
}

.hero-inner {
  max-width: 1300px;
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 2;
}

/* ── Books Grid ──────────────────────────────────────────── */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--sp-lg);
  margin-top: var(--sp-2xl);
}

/* ── Universe / Glossary Layout ──────────────────────────── */
.universe-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: var(--sp-2xl);
  margin-top: var(--sp-2xl);
  align-items: start;
}

.glossary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-md);
}

/* ── About Layout ────────────────────────────────────────── */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: var(--sp-2xl);
  align-items: center;
  margin-top: var(--sp-2xl);
}

.author-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-md);
  margin-top: var(--sp-xl);
}

/* ── Footer ──────────────────────────────────────────────── */
#footer {
  padding: var(--sp-xl);
  border-top: 1px solid var(--clr-border-dim);
  background: var(--clr-abyss);
}

.footer-inner {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-lg);
  flex-wrap: wrap;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .universe-layout,
  .about-layout {
    grid-template-columns: 1fr;
  }
  .glossary-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  #nav { padding: 0 var(--sp-lg); }
  .section { padding: var(--sp-2xl) var(--sp-lg); }
  #hero { padding: var(--sp-2xl) var(--sp-lg); }
  .nav-links { gap: 0; }
  .books-grid { grid-template-columns: 1fr; }
  .author-stats { grid-template-columns: repeat(3, 1fr); }
  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .author-stats { grid-template-columns: 1fr; }
}