/* Hero subtitle gradient */
.hero-subtitle-gradient {
  background: linear-gradient(90deg, #34d399, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Smooth reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.1, 0.25, 1),
              transform 0.8s cubic-bezier(0.25, 0.1, 0.25, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0s; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 0.3s; }
.reveal-stagger > .reveal:nth-child(5) { transition-delay: 0.4s; }

/* Navbar */
.topbar {
  background: rgba(251, 251, 253, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

/* Phone mockup */
.device {
  background: #1a1a1a;
  border-radius: 28px;
  padding: 8px;
  box-shadow: 0 50px 100px -20px rgba(0, 0, 0, 0.15),
              0 30px 60px -30px rgba(0, 0, 0, 0.2),
              inset 0 0 0 1px rgba(255,255,255,0.08);
}
.device-screen {
  border-radius: 22px;
  overflow: hidden;
  background: #1c1c1e;
}
.device-screen img {
  border-radius: 22px;
}

/* Section divider */
.section-divider {
  height: 1px;
  background: rgba(0, 0, 0, 0.06);
}

/* Dark section */
.dark-section {
  background: #1d1d1f;
  color: #f5f5f7;
}

/* Step number ring */
.step-ring {
  width: 56px;
  height: 56px;
  border: 2px solid #d2d2d7;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 600;
  color: #1d1d1f;
  transition: all 0.3s ease;
}
.step-ring:hover {
  border-color: #10b981;
  color: #10b981;
}

/* CTA buttons */
.btn-primary {
  background: #10b981;
  color: white;
  padding: 14px 32px;
  border-radius: 980px;
  font-size: 1.0625rem;
  font-weight: 500;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary:hover {
  background: #059669;
}

.btn-ghost {
  color: #10b981;
  padding: 14px 32px;
  border-radius: 980px;
  font-size: 1.0625rem;
  font-weight: 500;
  border: 1px solid #10b981;
  transition: all 0.3s ease;
}
.btn-ghost:hover {
  background: #10b981;
  color: white;
}

/* Expandable accordion */
.expand-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.25, 0.1, 0.25, 1),
              opacity 0.4s ease;
  opacity: 0;
}
.expand-content.open {
  opacity: 1;
}
.expand-toggle {
  color: #10b981;
  font-size: 1.25rem;
  cursor: pointer;
  transition: opacity 0.2s;
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
}
.expand-toggle:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.expand-toggle .arrow {
  display: inline-block;
  transition: transform 0.3s ease;
}
.expand-toggle.open .arrow {
  transform: rotate(90deg);
}

/* Smooth scroll */
html {
  scroll-behavior: smooth;
}