/**
 * Z-TRANSITIONS
 * ==============
 * Sistema unificado de transiciones
 * Todas las animaciones de la app en un solo lugar
 */

:root {
  /* Timing Functions - Apple-style easing */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Durations */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 350ms;
  --duration-slower: 500ms;
}

/* ============================================
   FADE
   ============================================ */
.z-fade-enter {
  opacity: 0;
}

.z-fade-enter-active {
  opacity: 1;
  transition: opacity var(--duration-normal) var(--ease-out-quart);
}

.z-fade-exit {
  opacity: 1;
}

.z-fade-exit-active {
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-in-out);
}

/* ============================================
   SCALE + FADE (Modals)
   ============================================ */
.z-scale-enter {
  opacity: 0;
  transform: scale(0.96);
  transform-origin: center center;
}

.z-scale-enter-active {
  opacity: 1;
  transform: scale(1);
  transform-origin: center center;
  transition:
    opacity var(--duration-normal) var(--ease-out-expo),
    transform var(--duration-normal) var(--ease-out-expo);
}

.z-scale-exit {
  opacity: 1;
  transform: scale(1);
  transform-origin: center center;
}

.z-scale-exit-active {
  opacity: 0;
  transform: scale(0.96);
  transform-origin: center center;
  transition:
    opacity var(--duration-fast) var(--ease-in-out),
    transform var(--duration-fast) var(--ease-in-out);
}

/* ============================================
   SLIDE UP (Bottom sheets, toasts)
   ============================================ */
.z-slide-up-enter {
  opacity: 0;
  transform: translateY(20px);
}

.z-slide-up-enter-active {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity var(--duration-normal) var(--ease-out-expo),
    transform var(--duration-normal) var(--ease-out-expo);
}

.z-slide-up-exit {
  opacity: 1;
  transform: translateY(0);
}

.z-slide-up-exit-active {
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity var(--duration-fast) var(--ease-in-out),
    transform var(--duration-fast) var(--ease-in-out);
}

/* ============================================
   SLIDE RIGHT (Sidebars, panels)
   ============================================ */
.z-slide-right-enter {
  opacity: 0;
  transform: translateX(-20px);
}

.z-slide-right-enter-active {
  opacity: 1;
  transform: translateX(0);
  transition:
    opacity var(--duration-normal) var(--ease-out-expo),
    transform var(--duration-normal) var(--ease-out-expo);
}

.z-slide-right-exit {
  opacity: 1;
  transform: translateX(0);
}

.z-slide-right-exit-active {
  opacity: 0;
  transform: translateX(-10px);
  transition:
    opacity var(--duration-fast) var(--ease-in-out),
    transform var(--duration-fast) var(--ease-in-out);
}

/* ============================================
   BACKDROP (Overlay blur)
   ============================================ */
.z-backdrop-enter {
  opacity: 0;
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
}

.z-backdrop-enter-active {
  opacity: 1;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition:
    opacity var(--duration-normal) var(--ease-out-quart),
    backdrop-filter var(--duration-slow) var(--ease-out-quart),
    -webkit-backdrop-filter var(--duration-slow) var(--ease-out-quart);
}

.z-backdrop-exit {
  opacity: 1;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.z-backdrop-exit-active {
  opacity: 0;
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  transition:
    opacity var(--duration-fast) var(--ease-in-out),
    backdrop-filter var(--duration-fast) var(--ease-in-out),
    -webkit-backdrop-filter var(--duration-fast) var(--ease-in-out);
}

/* ============================================
   VIEW TRANSITION (Page changes)
   ============================================ */
.z-view-enter {
  opacity: 0;
  transform: translateY(8px);
}

.z-view-enter-active {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity var(--duration-slow) var(--ease-out-expo),
    transform var(--duration-slow) var(--ease-out-expo);
}

.z-view-exit {
  opacity: 1;
  transform: translateY(0);
}

.z-view-exit-active {
  opacity: 0;
  transform: translateY(-8px);
  transition:
    opacity var(--duration-fast) var(--ease-in-out),
    transform var(--duration-fast) var(--ease-in-out);
}

/* ============================================
   EXPAND (Accordions, dropdowns)
   ============================================ */
.z-expand-enter {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
}

.z-expand-enter-active {
  opacity: 1;
  max-height: 1000px;
  transition:
    opacity var(--duration-normal) var(--ease-out-quart),
    max-height var(--duration-slow) var(--ease-out-expo);
}

.z-expand-exit {
  opacity: 1;
  max-height: 1000px;
  overflow: hidden;
}

.z-expand-exit-active {
  opacity: 0;
  max-height: 0;
  transition:
    opacity var(--duration-fast) var(--ease-in-out),
    max-height var(--duration-normal) var(--ease-in-out);
}

/* ============================================
   SPRING (Buttons, interactive elements)
   ============================================ */
.z-spring {
  transition: transform var(--duration-fast) var(--ease-spring);
}

.z-spring:active {
  transform: scale(0.97);
}

/* ============================================
   STAGGER (List items)
   ============================================ */
.z-stagger > * {
  opacity: 0;
  transform: translateY(10px);
  animation: zStaggerIn var(--duration-normal) var(--ease-out-expo) forwards;
}

.z-stagger > *:nth-child(1) { animation-delay: 0ms; }
.z-stagger > *:nth-child(2) { animation-delay: 50ms; }
.z-stagger > *:nth-child(3) { animation-delay: 100ms; }
.z-stagger > *:nth-child(4) { animation-delay: 150ms; }
.z-stagger > *:nth-child(5) { animation-delay: 200ms; }
.z-stagger > *:nth-child(6) { animation-delay: 250ms; }
.z-stagger > *:nth-child(7) { animation-delay: 300ms; }
.z-stagger > *:nth-child(8) { animation-delay: 350ms; }

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

/* ============================================
   UTILITY: Transition all
   ============================================ */
.z-transition {
  transition: all var(--duration-normal) var(--ease-out-quart);
}

.z-transition-fast {
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.z-transition-slow {
  transition: all var(--duration-slow) var(--ease-out-expo);
}