/* ==========================================================================
   NexTool Revolution — Landing Page Styles
   Each section: ONE thought per viewport. Apple principle.
   ========================================================================== */


/* --------------------------------------------------------------------------
   SECTION 1: HERO — The first impression. 100vh. No scroll needed.
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-24) var(--content-padding) var(--space-16);
  overflow: hidden;
}

/* Ambient background glow (replaced by Three.js mesh gradient in Phase 2) */
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.hero__bg::before {
  content: '';
  position: absolute;
  width: 120%;
  height: 120%;
  top: -10%;
  left: -10%;
  background:
    radial-gradient(ellipse at 30% 30%, rgba(99, 91, 255, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 60%, rgba(0, 212, 255, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 90%, rgba(99, 91, 255, 0.04) 0%, transparent 40%);
  background-size: 200% 200%;
  animation: ambient-gradient 20s ease-in-out infinite;
}

/* Noise overlay for texture */
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.02'/%3E%3C/svg%3E");
  opacity: 0.4;
  pointer-events: none;
}

.hero__content {
  max-width: 900px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  z-index: 1;
}

.hero__overline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--text-tertiary);
  letter-spacing: var(--tracking-wide);
}

.hero__overline-dot {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: glow-pulse 2s ease-in-out infinite;
}

.hero__headline {
  font-size: var(--text-hero);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tighter);
  color: var(--text-primary);
  max-width: 14ch; /* Optimal line length for readability */
}

.hero__subheadline {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 50ch;
}

/* Hero Input — The main interaction */
.hero__input-container {
  width: 100%;
  max-width: 620px;
  margin-top: var(--space-4);
  position: relative;
}

.hero__input {
  width: 100%;
  padding: var(--space-5) var(--space-6);
  padding-right: 160px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  color: var(--text-primary);
  font-size: var(--text-lg);
  transition:
    border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
}

.hero__input::placeholder {
  color: var(--text-muted);
}

.hero__input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow), var(--shadow-lg);
}

.hero__input-btn {
  position: absolute;
  right: var(--space-2);
  top: 50%;
  transform: translateY(-50%);
}

.hero__trust {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.hero__trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.hero__trust-icon {
  width: 16px;
  height: 16px;
  opacity: 0.6;
}

/* Scroll indicator at bottom */
.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-muted);
  font-size: var(--text-xs);
}

.hero__scroll-arrow {
  width: 20px;
  height: 20px;
}

@media (max-width: 768px) {
  .hero {
    padding-top: var(--space-20);
    padding-bottom: var(--space-12);
    min-height: auto;
  }

  .hero__input {
    padding-right: var(--space-6);
    font-size: var(--text-base);
  }

  .hero__input-btn {
    position: relative;
    right: auto;
    top: auto;
    transform: none;
    width: 100%;
    margin-top: var(--space-3);
  }

  .hero__trust {
    flex-direction: column;
    gap: var(--space-3);
  }
}


/* --------------------------------------------------------------------------
   SECTION 2: DEMO / TRANSFORMATION
   Shows normal prompt → NexTool pack → amazing result
   -------------------------------------------------------------------------- */

.demo-section {
  position: relative;
  padding-block: var(--space-section);
  overflow: hidden;
}

.demo-section__header {
  text-align: center;
  max-width: 700px;
  margin-inline: auto;
  margin-bottom: var(--space-16);
}

.demo-section__overline {
  margin-bottom: var(--space-4);
}

/* The transformation display */
.demo-transform {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-6);
  align-items: stretch;
  max-width: 1100px;
  margin-inline: auto;
}

.demo-transform__panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.demo-transform__panel-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-glass);
}

.demo-transform__panel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.demo-transform__panel-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
}

.demo-transform__panel-body {
  padding: var(--space-5);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  min-height: 280px;
}

/* Before panel — dim, short, vague */
.demo-transform__before .demo-transform__panel-dot {
  background: var(--error);
}

.demo-transform__before .demo-transform__panel-body {
  color: var(--text-tertiary);
}

/* After panel — vibrant, structured, impressive */
.demo-transform__after {
  border-color: var(--border-active);
  box-shadow: 0 0 40px rgba(99, 91, 255, 0.08), 0 0 80px rgba(0, 212, 255, 0.04);
}

.demo-transform__after .demo-transform__panel-dot {
  background: var(--success);
}

.demo-transform__after .demo-transform__panel-body {
  color: var(--text-secondary);
}

/* Arrow between panels */
.demo-transform__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.demo-transform__arrow-icon {
  width: 32px;
  height: 32px;
  color: var(--accent);
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

/* Highlighted syntax in code panels */
.demo-highlight {
  color: var(--accent-light);
}

.demo-highlight--cyan {
  color: var(--cyan);
}

.demo-highlight--green {
  color: var(--success);
}

@media (max-width: 768px) {
  .demo-transform {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .demo-transform__arrow {
    transform: rotate(90deg);
    padding: var(--space-2);
  }
}


/* --------------------------------------------------------------------------
   SECTION 3: HOW IT WORKS — 3 clear steps
   -------------------------------------------------------------------------- */

.how-section {
  padding-block: var(--space-section);
}

.how-section__header {
  text-align: center;
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-16);
}

.how-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  max-width: 1000px;
  margin-inline: auto;
}

.how-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-5);
  position: relative;
}

/* Connector line between steps */
.how-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 36px;
  right: -16%;
  width: 32%;
  height: 1px;
  background: linear-gradient(
    90deg,
    var(--border-default) 0%,
    var(--accent) 50%,
    var(--border-default) 100%
  );
  opacity: 0.5;
}

.how-step__number {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--accent);
  flex-shrink: 0;
}

.how-step__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-medium);
  color: var(--text-primary);
}

.how-step__description {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 30ch;
}

@media (max-width: 768px) {
  .how-steps {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .how-step:not(:last-child)::after {
    display: none;
  }
}


/* --------------------------------------------------------------------------
   SECTION 4: CATEGORIES — What you can create
   -------------------------------------------------------------------------- */

.categories-section {
  padding-block: var(--space-section);
}

.categories-section__header {
  text-align: center;
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-12);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-4);
}

.category-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition:
    border-color var(--duration-normal) var(--ease-out),
    background var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

.category-card:hover {
  border-color: var(--border-active);
  background: var(--bg-tertiary);
  transform: translateY(-2px);
}

.category-card__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-surface);
  border-radius: var(--radius-md);
  color: var(--accent);
  flex-shrink: 0;
  font-size: 20px;
}

.category-card__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.category-card__title {
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--text-primary);
}

.category-card__desc {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  line-height: var(--leading-normal);
}

.category-card__arrow {
  margin-left: auto;
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  transition: transform var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
  align-self: center;
}

.category-card:hover .category-card__arrow {
  color: var(--accent);
  transform: translateX(4px);
}


/* --------------------------------------------------------------------------
   SECTION 5: SOCIAL PROOF — Numbers and trust
   -------------------------------------------------------------------------- */

.proof-section {
  padding-block: var(--space-section);
  text-align: center;
}

.proof-section__header {
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-12);
}

.proof-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  max-width: 800px;
  margin-inline: auto;
  margin-bottom: var(--space-16);
}

/* Model support badges */
.proof-models {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  padding: var(--space-8) 0;
}

.proof-model {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.proof-model__icon {
  width: 20px;
  height: 20px;
}

@media (max-width: 768px) {
  .proof-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
}


/* --------------------------------------------------------------------------
   SECTION 6: PRICING — Clear, honest, no tricks
   -------------------------------------------------------------------------- */

.pricing-section {
  padding-block: var(--space-section);
}

.pricing-section__header {
  text-align: center;
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-4);
}

/* Billing toggle */
.pricing-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-12);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.pricing-toggle__switch {
  width: 44px;
  height: 24px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  position: relative;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out);
}

.pricing-toggle__switch::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  background: var(--text-primary);
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: transform var(--duration-fast) var(--ease-out);
}

.pricing-toggle__switch.active,
.pricing-toggle__switch--annual {
  background: var(--accent);
  border-color: var(--accent);
}

.pricing-toggle__switch.active::after,
.pricing-toggle__switch--annual::after {
  transform: translateX(20px);
}

.pricing-toggle__save {
  background: var(--success-surface);
  color: var(--success);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
}

/* Pricing grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  max-width: 1000px;
  margin-inline: auto;
}

@media (max-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
  }
}


/* --------------------------------------------------------------------------
   SECTION 7: FAQ
   -------------------------------------------------------------------------- */

.faq-section {
  padding-block: var(--space-section);
}

.faq-section__header {
  text-align: center;
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-12);
}

.faq-list {
  max-width: 700px;
  margin-inline: auto;
}


/* --------------------------------------------------------------------------
   SECTION 8: FINAL CTA — Emotional closer
   -------------------------------------------------------------------------- */

.final-cta {
  position: relative;
  padding-block: var(--space-section);
  text-align: center;
  overflow: hidden;
}

.final-cta__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse at 50% 50%, rgba(99, 91, 255, 0.10) 0%, transparent 60%);
}

.final-cta__content {
  max-width: 700px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

.final-cta__headline {
  font-size: var(--text-4xl);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

.final-cta__sub {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 50ch;
}

.final-cta__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

@media (max-width: 768px) {
  .final-cta__actions {
    flex-direction: column;
    width: 100%;
  }

  .final-cta__actions .btn {
    width: 100%;
  }
}