/*
 * animations.css
 * Biharibuilder Design System — Animation & Motion System
 * Version: 1.0
 *
 * Animations allowed (from 02_Brand_Guidelines.md):
 *   Fade, Slide, Smooth Hover, Counter, Sticky Header, Accordion, Lightbox
 *
 * Animations NOT allowed:
 *   Excessive parallax, flying elements, bounce animations, auto-playing carousels
 *
 * All animations respect prefers-reduced-motion.
 * Duration: 250–400ms. Ease: ease-out.
 */

/* =========================================================
   KEYFRAMES
   ========================================================= */

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-32px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(32px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.93);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Pulse animation — for floating buttons */
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0   rgba(180, 100, 60, 0.5); }
  50%  { box-shadow: 0 0 0 12px rgba(180, 100, 60, 0);   }
  100% { box-shadow: 0 0 0 0   rgba(180, 100, 60, 0);    }
}

@keyframes pulseWhatsApp {
  0%   { box-shadow: 0 0 0 0   rgba(37, 211, 102, 0.5); }
  50%  { box-shadow: 0 0 0 12px rgba(37, 211, 102, 0);   }
  100% { box-shadow: 0 0 0 0   rgba(37, 211, 102, 0);    }
}

/* Spinner */
@keyframes spin {
  from { transform: rotate(0deg);   }
  to   { transform: rotate(360deg); }
}

/* =========================================================
   SCROLL-TRIGGERED ANIMATION CLASSES
   Applied via IntersectionObserver in animations.js
   ========================================================= */

/* Initial hidden states */
[data-animation="fade-up"],
[data-animation="fade-in"],
[data-animation="slide-left"],
[data-animation="slide-right"],
[data-animation="scale-in"] {
  opacity: 0;
  transition:
    opacity    400ms ease-out,
    transform  400ms ease-out;
  will-change: opacity, transform;
}

[data-animation="fade-up"]    { transform: translateY(24px); }
[data-animation="slide-left"] { transform: translateX(-32px); }
[data-animation="slide-right"]{ transform: translateX(32px); }
[data-animation="scale-in"]   { transform: scale(0.93); }

/* Animated in state */
[data-animation].is-animated {
  opacity: 1;
  transform: none;
}

/* Staggered children */
[data-stagger] > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity   350ms ease-out,
    transform 350ms ease-out;
}

[data-stagger].is-animated > *:nth-child(1)  { transition-delay: 0ms;    opacity: 1; transform: none; }
[data-stagger].is-animated > *:nth-child(2)  { transition-delay: 80ms;   opacity: 1; transform: none; }
[data-stagger].is-animated > *:nth-child(3)  { transition-delay: 160ms;  opacity: 1; transform: none; }
[data-stagger].is-animated > *:nth-child(4)  { transition-delay: 240ms;  opacity: 1; transform: none; }
[data-stagger].is-animated > *:nth-child(5)  { transition-delay: 320ms;  opacity: 1; transform: none; }
[data-stagger].is-animated > *:nth-child(6)  { transition-delay: 400ms;  opacity: 1; transform: none; }

/* =========================================================
   FLOATING ACTION BUTTONS — Pulse
   ========================================================= */

.fab--pulse {
  animation: pulseWhatsApp 2s ease-out;
}

.fab--pulse-copper {
  animation: pulse 2s ease-out;
}

/* =========================================================
   ACCORDION ANIMATION
   ========================================================= */

.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 350ms ease-out, padding 350ms ease-out;
}

.accordion__content.is-open {
  max-height: 600px; /* safe max that won't cut off content */
}

/* Chevron rotation */
.accordion__chevron {
  transition: transform 300ms ease-out;
  flex-shrink: 0;
}

.accordion__item.is-open .accordion__chevron {
  transform: rotate(180deg);
}

/* =========================================================
   HERO SECTION ENTRY ANIMATION
   ========================================================= */

.hero__content {
  animation: fadeInUp 700ms ease-out both;
}

.hero__form-wrapper {
  animation: fadeInUp 700ms 200ms ease-out both;
}

.hero__badges {
  animation: fadeInUp 700ms 400ms ease-out both;
}

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

.page-transition {
  position: fixed;
  inset: 0;
  background: var(--color-anthracite);
  z-index: var(--z-loader);
  pointer-events: none;
  opacity: 0;
  transition: opacity 300ms ease-out;
}

/* =========================================================
   LIGHTBOX ANIMATION
   ========================================================= */

.lightbox {
  animation: fadeIn 250ms ease-out;
}

.lightbox__image {
  animation: scaleIn 300ms ease-out;
}

/* =========================================================
   TOOLTIP / POPOVER
   ========================================================= */

.tooltip {
  animation: fadeInUp 200ms ease-out;
}

/* =========================================================
   REDUCED MOTION OVERRIDE
   All animations respect this media query (also handled in reset.css)
   ========================================================= */

@media (prefers-reduced-motion: reduce) {

  [data-animation],
  [data-stagger] > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .hero__content,
  .hero__form-wrapper,
  .hero__badges {
    animation: none;
  }

  .accordion__content {
    transition: none;
  }

  .fab--pulse,
  .fab--pulse-copper {
    animation: none;
  }
}