html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
}

a {
  text-decoration: none;
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  display: block;
  margin-bottom: var(--space-6);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-weight: 500;
  border: none;
  transition: background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast);
}

.btn-primary {
  background: var(--color-accent);
  color: #ffffff;
  border-radius: var(--radius-lg);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
}

.btn-sm {
  font-size: var(--text-sm);
  padding: var(--space-2) 18px;
}

.btn-full {
  width: 100%;
  height: 52px;
  font-size: var(--text-base);
  font-weight: 500;
  border-radius: var(--radius-lg);
}

a.btn {
  text-decoration: none;
  box-sizing: border-box;
}

.faq-question:focus-visible,
.btn:focus-visible,
.nav-logo:focus-visible,
a.builder-handle:focus-visible,
a.builder-link:focus-visible,
.footer-links a:focus-visible,
.footer-logo-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.nav.scrolled {
  background: rgba(10, 10, 11, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
}

.tally-embed iframe,
iframe[src*="tally.so"] {
  background: transparent !important;
  border: none !important;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

@keyframes heroDividerGrow {
  from {
    width: 0;
  }
  to {
    width: 60px;
  }
}

.stat-card {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.stat-card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.problem-stats .stat-card:nth-child(1) {
  transition-delay: 0ms;
}

.problem-stats .stat-card:nth-child(2) {
  transition-delay: 100ms;
}

.problem-stats .stat-card:nth-child(3) {
  transition-delay: 200ms;
}

.step-card {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.step-card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.steps-grid .step-card:nth-child(1) {
  transition-delay: 0ms;
}

.steps-grid .step-card:nth-child(2) {
  transition-delay: 120ms;
}

.steps-grid .step-card:nth-child(3) {
  transition-delay: 240ms;
}

.steps-grid .step-card:nth-child(4) {
  transition-delay: 360ms;
}

.feature-card {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease, transform 500ms ease,
    background-color var(--transition-fast);
}

.feature-card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.persona-card {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease, transform 500ms ease,
    border-color var(--transition-fast);
}

.persona-card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* Desktop first */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px;
  }

  .hero-headline {
    font-size: 52px;
  }

  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px;
  }

  .hero-headline {
    font-size: 36px;
  }

  .hero-sub {
    font-size: 16px;
  }

  .proof-sep {
    display: none;
  }

  .problem-grid,
  .compare-row,
  .steps-grid,
  .persona-grid,
  .pricing-grid,
  .science-bullets {
    grid-template-columns: 1fr !important;
  }

  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-inner {
    flex-direction: column;
    justify-content: center;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }
}

@media (max-width: 639px) {
  .nav-counter {
    display: none !important;
  }
}

@media (max-width: 480px) {
  :root {
    --section-padding: 48px;
  }

  .hero-headline {
    font-size: 30px;
  }

  section[id],
  footer#footer {
    padding-left: 16px;
    padding-right: 16px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }
}