/* ============================================
   ANIMATIONS.CSS — Scroll & Transition Effects
   ============================================ */

/* --- Section Fade-In (whole sections appear smoothly) --- */
.section {
  opacity: 0;
  transform: translateY(40px);
  transition:
    opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.section--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Product section always visible (has its own bg) */
.product--expanded {
  opacity: 1;
  transform: none;
}

/* --- Reveal on Scroll (individual elements) --- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--delay, 0s);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Reveal from left */
.reveal--left {
  transform: translateX(-40px);
}
.reveal--left.visible {
  transform: translateX(0);
}

/* Reveal from right */
.reveal--right {
  transform: translateX(40px);
}
.reveal--right.visible {
  transform: translateX(0);
}

/* Reveal with scale */
.reveal--scale {
  transform: scale(0.92);
}
.reveal--scale.visible {
  transform: scale(1);
}

/* --- Hero Entrance --- */
.animate-in {
  opacity: 0;
  transform: translateY(40px) scale(0.97);
  animation: heroEntrance 1.2s cubic-bezier(0.22, 1, 0.36, 1) 0.3s forwards;
}

@keyframes heroEntrance {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* --- Hero Badge Pulse --- */
.hero__badge {
  animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 170, 0.15); }
  50% { box-shadow: 0 0 0 8px rgba(0, 212, 170, 0); }
}

/* --- Logo Text Glow --- */
.header__logo {
  transition: filter var(--transition-base);
}

.header__logo:hover .logo-text {
  filter: drop-shadow(0 0 12px rgba(0, 212, 170, 0.4));
}

/* --- Button Shine Sweep --- */
.btn--primary {
  position: relative;
  overflow: hidden;
}

.btn--primary::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    105deg,
    transparent 40%,
    rgba(255, 255, 255, 0.15) 45%,
    rgba(255, 255, 255, 0.05) 50%,
    transparent 55%
  );
  transform: translateX(-100%);
  transition: transform 0.6s ease;
  pointer-events: none;
}

.btn--primary:hover::after {
  transform: translateX(60%);
}

/* --- Step Card Number Glow --- */
.step-card:hover .step-card__number {
  opacity: 0.6;
  text-shadow: 0 0 30px rgba(0, 212, 170, 0.3);
}

/* Team portrait ring on hover */
.team-card__photo {
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.team-card:hover .team-card__photo {
  border-color: rgba(0, 212, 170, 0.5);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(0, 212, 170, 0.25);
}

/* --- Steps Line Animation --- */
.steps__line {
  background-size: 200% 100%;
  animation: lineFlow 4s linear infinite;
}

@keyframes lineFlow {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- Stat Number Count-Up Glow --- */
.stat-card__number {
  transition: text-shadow var(--transition-base);
}

.stat-card:hover .stat-card__number {
  text-shadow: 0 0 20px rgba(0, 212, 170, 0.4);
}

/* Nav: no pseudo underlines — avoids stray teal lines across links on some layouts/zoom levels */

/* --- Section Divider Gradient --- */
.problem,
.how-it-works,
.use-cases,
.team {
  background: var(--color-bg-secondary);
  overflow: visible;
}

.benefits {
  overflow: visible;
}

.product--expanded {
  background: var(--color-bg-primary);
}

.product--expanded::before {
  display: none;
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-border) 50%,
    transparent 100%
  );
}

/* --- Comparison Card Entry --- */
.comparison-card__side--old li,
.comparison-card__side--new li {
  opacity: 0;
  transform: translateX(-16px);
}

.comparison-card__side--new li {
  transform: translateX(16px);
}

.reveal.visible .comparison-card__side--old li,
.reveal.visible .comparison-card__side--new li {
  opacity: 1;
  transform: translateX(0);
  transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1), transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible .comparison-card__side--old li:nth-child(1),
.reveal.visible .comparison-card__side--new li:nth-child(1) { transition-delay: 0.1s; }
.reveal.visible .comparison-card__side--old li:nth-child(2),
.reveal.visible .comparison-card__side--new li:nth-child(2) { transition-delay: 0.2s; }
.reveal.visible .comparison-card__side--old li:nth-child(3),
.reveal.visible .comparison-card__side--new li:nth-child(3) { transition-delay: 0.3s; }
.reveal.visible .comparison-card__side--old li:nth-child(4),
.reveal.visible .comparison-card__side--new li:nth-child(4) { transition-delay: 0.4s; }

/* --- Swap Card Hover Lift --- */
.swap-card__inner {
  transition: box-shadow 0.3s ease;
}

.swap-card:hover .swap-card__inner {
  box-shadow: 0 16px 48px rgba(0, 212, 170, 0.12);
}

/* --- Product Highlights Stagger --- */
.product__highlight {
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible .product__highlight:nth-child(1) { opacity: 1; transform: translateX(0); transition-delay: 0.15s; }
.reveal.visible .product__highlight:nth-child(2) { opacity: 1; transform: translateX(0); transition-delay: 0.25s; }
.reveal.visible .product__highlight:nth-child(3) { opacity: 1; transform: translateX(0); transition-delay: 0.35s; }
.reveal.visible .product__highlight:nth-child(4) { opacity: 1; transform: translateX(0); transition-delay: 0.45s; }

/* --- Form Submit Success --- */
.contact__form.submitted .btn--primary {
  background: linear-gradient(135deg, #10b981, #059669);
  pointer-events: none;
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal,
  .section {
    opacity: 1;
    transform: none;
  }

  .animate-in {
    opacity: 1;
    transform: none;
    animation: none;
  }
}