/* ============================================
   ANIMATIONS - Google / Material Inspired
   Subtle, quick, purposeful reveals
   ============================================ */

/* === SCROLL REVEAL BASE STATES === */

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-reveal) var(--ease-out),
              transform var(--duration-reveal) var(--ease-out);
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--duration-reveal) var(--ease-out),
              transform var(--duration-reveal) var(--ease-out);
}

[data-reveal-stagger].revealed > *:nth-child(1) { transition-delay: 0s; }
[data-reveal-stagger].revealed > *:nth-child(2) { transition-delay: 0.06s; }
[data-reveal-stagger].revealed > *:nth-child(3) { transition-delay: 0.12s; }
[data-reveal-stagger].revealed > *:nth-child(4) { transition-delay: 0.18s; }
[data-reveal-stagger].revealed > *:nth-child(5) { transition-delay: 0.24s; }
[data-reveal-stagger].revealed > *:nth-child(6) { transition-delay: 0.3s; }
[data-reveal-stagger].revealed > *:nth-child(7) { transition-delay: 0.36s; }
[data-reveal-stagger].revealed > *:nth-child(8) { transition-delay: 0.42s; }
[data-reveal-stagger].revealed > *:nth-child(9) { transition-delay: 0.48s; }
[data-reveal-stagger].revealed > *:nth-child(10) { transition-delay: 0.54s; }

[data-reveal-stagger].revealed > * {
  opacity: 1;
  transform: translateY(0);
}

/* === LEGACY CLASS-BASED REVEALS === */
/* Used by inner pages (about, contact, insights, expertises, sectors) */

.reveal-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-reveal) var(--ease-out),
              transform var(--duration-reveal) var(--ease-out);
}

.reveal-up.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity var(--duration-reveal) var(--ease-out),
              transform var(--duration-reveal) var(--ease-out);
}

.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(20px);
  transition: opacity var(--duration-reveal) var(--ease-out),
              transform var(--duration-reveal) var(--ease-out);
}

.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-fade {
  opacity: 0;
  transition: opacity var(--duration-reveal) var(--ease-out);
}

.reveal-fade.revealed {
  opacity: 1;
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity var(--duration-reveal) var(--ease-out),
              transform var(--duration-reveal) var(--ease-out);
}

.reveal-scale.revealed {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays for legacy reveals with data-reveal-delay */
.reveal-up[data-reveal-delay="1"].revealed,
.reveal-left[data-reveal-delay="1"].revealed,
.reveal-right[data-reveal-delay="1"].revealed { transition-delay: 0.06s; }

.reveal-up[data-reveal-delay="2"].revealed,
.reveal-left[data-reveal-delay="2"].revealed,
.reveal-right[data-reveal-delay="2"].revealed { transition-delay: 0.12s; }

.reveal-up[data-reveal-delay="3"].revealed,
.reveal-left[data-reveal-delay="3"].revealed,
.reveal-right[data-reveal-delay="3"].revealed { transition-delay: 0.18s; }

.reveal-up[data-reveal-delay="4"].revealed,
.reveal-left[data-reveal-delay="4"].revealed,
.reveal-right[data-reveal-delay="4"].revealed { transition-delay: 0.24s; }

.reveal-up[data-reveal-delay="5"].revealed,
.reveal-left[data-reveal-delay="5"].revealed,
.reveal-right[data-reveal-delay="5"].revealed { transition-delay: 0.3s; }

.reveal-up[data-reveal-delay="6"].revealed,
.reveal-left[data-reveal-delay="6"].revealed,
.reveal-right[data-reveal-delay="6"].revealed { transition-delay: 0.36s; }

/* Gold rule animation */
.gold-rule--animated {
  width: 0;
  transition: width 0.6s var(--ease-out);
}

.gold-rule--animated.revealed {
  width: 48px;
}

/* Simple fade */
[data-reveal="fade"] {
  transform: none;
}

/* Slide from left */
[data-reveal="slide-left"] {
  transform: translateX(-20px);
}

[data-reveal="slide-left"].revealed {
  transform: translateX(0);
}

/* Slide from right */
[data-reveal="slide-right"] {
  transform: translateX(20px);
}

[data-reveal="slide-right"].revealed {
  transform: translateX(0);
}

/* === PAGE TRANSITION === */

.page-transition {
  animation: pageIn 0.3s var(--ease-out) forwards;
}

@keyframes pageIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* === COUNTER ANIMATION === */

.counter-animated {
  transition: none;
}

/* === SKIP TO CONTENT === */

.skip-to-content {
  position: fixed;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  background: var(--color-accent);
  color: var(--color-white);
  padding: 12px 24px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  text-decoration: none;
  transition: top var(--duration-base) var(--ease-out);
}

.skip-to-content:focus {
  top: 0;
  outline: none;
}

/* === BACK TO TOP BUTTON === */

.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: var(--z-sticky);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: opacity var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out),
              background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

/* === MICRO-INTERACTIONS === */

/* Button press effect */
.btn:active {
  transform: scale(0.97);
}

/* Card hover lift */
.card--expertise:hover,
.card--ai:hover {
  transform: translateY(-3px);
}

/* Link arrow animation */
.card__arrow {
  transition: transform var(--duration-fast) var(--ease-out);
}

.card--expertise:hover .card__arrow {
  transform: translateX(4px);
}

/* Trust badges hover */
.trust__badge {
  transition: border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.trust__badge:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-muted);
}

/* Story block link card hover */
.story-block__link-card:hover h4 {
  color: var(--color-accent);
}

/* Insight card hover */
.card--insight {
  transition: border-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}

.card--insight:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

/* === REDUCED MOTION === */

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

  [data-reveal],
  [data-reveal-stagger] > *,
  .reveal-up,
  .reveal-left,
  .reveal-right,
  .reveal-fade,
  .reveal-scale,
  .gold-rule--animated {
    opacity: 1;
    transform: none;
    width: auto;
  }
}