/* Full-screen sections */
.section-full {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-lg) var(--space-md);
  position: relative;
  overflow: hidden;
}

/* Hero */
#hero {
  text-align: center;
  background: var(--bg-deep);
  position: relative;
}

#hero .hero-inner {
  position: relative;
  z-index: 2;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(108, 92, 231, 0.08) 0%, transparent 70%);
  z-index: 1;
}

.scroll-hint {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-tertiary);
  font-size: var(--text-sm);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.scroll-hint-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--text-tertiary);
  border-bottom: 2px solid var(--text-tertiary);
  transform: rotate(45deg);
  animation: bounce 2s ease-in-out infinite;
}

/* Manifesto */
#manifesto {
  text-align: center;
}

/* TOC grid */
#toc {
  padding: var(--space-xl) var(--space-md);
}

.toc-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.toc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
}

/* Model sections */
.model-section {
  min-height: 100vh;
  padding: var(--space-xl) var(--space-md);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.model-section:nth-child(odd) {
  background: var(--bg-section);
}

.model-section:nth-child(even) {
  background: var(--bg-section-alt);
}

.model-content {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.model-block {
  margin-bottom: var(--space-lg);
}

/* Layout Variant A: text left, bg number right */
.model-section[data-layout="a"] .model-bg-number {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  font-size: clamp(6rem, 15vw, 12rem);
  z-index: 1;
}

.model-section[data-layout="a"] .model-content {
  max-width: 800px;
  margin-left: 8%;
  margin-right: auto;
}

/* Layout Variant B: centered text */
.model-section[data-layout="b"] {
  text-align: center;
}

.model-section[data-layout="b"] .model-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.model-section[data-layout="b"] .model-block p,
.model-section[data-layout="b"] .model-block ul {
  text-align: left;
}

.model-section[data-layout="b"] .model-bg-number {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  font-size: clamp(6rem, 12vw, 10rem);
  z-index: 1;
}

.model-section[data-layout="b"] .model-subtitle {
  justify-content: center;
}

/* Layout Variant C: two columns on desktop */
.model-section[data-layout="c"] .model-content {
  max-width: 1100px;
}

.model-section[data-layout="c"] .model-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-md);
}

.model-section[data-layout="c"] .model-bg-number {
  position: absolute;
  left: 5%;
  bottom: 10%;
  font-size: clamp(6rem, 12vw, 10rem);
  z-index: 1;
}

/* Workshop section */
#workshop {
  min-height: 100vh;
  padding: var(--space-xl) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-deep);
  position: relative;
}

#workshop::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(108, 92, 231, 0.06) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(0, 206, 201, 0.04) 0%, transparent 60%);
  z-index: 0;
}

.workshop-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 700px;
}

/* Closing */
#closing {
  min-height: 50vh;
  text-align: center;
  background: var(--bg-deep);
}

.closing-text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--text-secondary);
  max-width: 30em;
}

/* Responsive */
@media (max-width: 1023px) {
  .toc-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .model-section[data-layout="a"] .model-content {
    margin-left: auto;
  }

  .model-section[data-layout="c"] .model-columns {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  .section-full {
    padding: var(--space-lg) var(--space-sm);
  }

  .model-section {
    padding: var(--space-lg) var(--space-sm);
  }

  .toc-grid {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .model-section[data-layout="a"] .model-bg-number,
  .model-section[data-layout="b"] .model-bg-number,
  .model-section[data-layout="c"] .model-bg-number {
    font-size: 4rem;
    opacity: 0.08;
  }

  #toc {
    padding: var(--space-lg) var(--space-sm);
  }
}