/**
 * Smooth Page Transitions - Frontend Styles
 */

:root {
  --spt-duration: 400ms;
  --spt-easing: cubic-bezier(0.16, 1, 0.3, 1);
  --spt-curtain-color: #1c61e7;
}

/* Base Transition Container on Body */
body.spt-active {
  transition: opacity var(--spt-duration) var(--spt-easing),
              transform var(--spt-duration) var(--spt-easing);
  will-change: opacity, transform;
}

/* -------------------------------------------------------------
   1. Fade Effect
   ------------------------------------------------------------- */
body.spt-effect-fade.spt-animating-in {
  opacity: 0;
}
body.spt-effect-fade.spt-entered {
  opacity: 1;
}
body.spt-effect-fade.spt-animating-out {
  opacity: 0;
}

/* -------------------------------------------------------------
   2. Slide Effect (Subtle vertical drift)
   ------------------------------------------------------------- */
body.spt-effect-slide.spt-animating-in {
  opacity: 0;
  transform: translateY(14px);
}
body.spt-effect-slide.spt-entered {
  opacity: 1;
  transform: translateY(0);
}
body.spt-effect-slide.spt-animating-out {
  opacity: 0;
  transform: translateY(-14px);
}

/* -------------------------------------------------------------
   3. Zoom Effect (Subtle depth scale)
   ------------------------------------------------------------- */
body.spt-effect-zoom.spt-animating-in {
  opacity: 0;
  transform: scale(0.98);
}
body.spt-effect-zoom.spt-entered {
  opacity: 1;
  transform: scale(1);
}
body.spt-effect-zoom.spt-animating-out {
  opacity: 0;
  transform: scale(1.02);
}

/* -------------------------------------------------------------
   4. Curtain Effect
   ------------------------------------------------------------- */
.spt-curtain-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--spt-curtain-color);
  z-index: 999999;
  pointer-events: none;
  transform: scaleY(0);
  transform-origin: bottom center;
  transition: transform var(--spt-duration) var(--spt-easing);
  will-change: transform;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* Curtain entering (sliding down to uncover the new page) */
body.spt-effect-curtain .spt-curtain-overlay.spt-curtain-in {
  transform: scaleY(1);
  transform-origin: top center;
}
body.spt-effect-curtain .spt-curtain-overlay.spt-curtain-exit {
  transform: scaleY(0);
  transform-origin: top center;
}

/* Curtain exiting (sliding up to cover current page before navigation) */
body.spt-effect-curtain.spt-animating-out .spt-curtain-overlay {
  pointer-events: auto;
  transform: scaleY(1);
  transform-origin: bottom center;
}

/* -------------------------------------------------------------
   5. Brand Logo & Spinner Styles
   ------------------------------------------------------------- */
.spt-loader-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  opacity: 0;
  transform: scale(0.92);
  transition: opacity calc(var(--spt-duration) * 0.6) ease,
              transform calc(var(--spt-duration) * 0.6) ease;
  pointer-events: none;
}

.spt-curtain-overlay.spt-curtain-in .spt-loader-wrap,
body.spt-animating-out .spt-curtain-overlay .spt-loader-wrap,
body.spt-animating-out .spt-floating-loader .spt-loader-wrap {
  opacity: 1;
  transform: scale(1);
}

/* Floating loader badge for Fade / Slide / Zoom if logo or spinner enabled */
.spt-floating-loader {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 999998;
  pointer-events: none;
  opacity: 0;
  transition: opacity calc(var(--spt-duration) * 0.5) ease;
}

body.spt-animating-out .spt-floating-loader {
  opacity: 1;
}

/* Logo styling */
.spt-brand-logo {
  display: block;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.15));
  animation: spt-logo-float 2.4s ease-in-out infinite;
}

@keyframes spt-logo-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* Spinner 1: Circular Ring */
.spt-spinner-circle {
  width: 32px;
  height: 32px;
  border: 3px solid rgba(255, 255, 255, 0.25);
  border-top-color: var(--spt-spinner-color, #ffffff);
  border-radius: 50%;
  animation: spt-spin 0.8s linear infinite;
}

@keyframes spt-spin {
  to { transform: rotate(360deg); }
}

/* Spinner 2: Pulsing Dots */
.spt-spinner-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}

.spt-spinner-dots span {
  width: 9px;
  height: 9px;
  background-color: var(--spt-spinner-color, #ffffff);
  border-radius: 50%;
  display: inline-block;
  animation: spt-dot-pulse 1.2s infinite ease-in-out both;
}

.spt-spinner-dots span:nth-child(1) { animation-delay: -0.32s; }
.spt-spinner-dots span:nth-child(2) { animation-delay: -0.16s; }
.spt-spinner-dots span:nth-child(3) { animation-delay: 0s; }

@keyframes spt-dot-pulse {
  0%, 80%, 100% {
    transform: scale(0.4);
    opacity: 0.4;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Spinner 3: Top Horizontal Progress Bar */
.spt-spinner-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 3px;
  background: var(--spt-spinner-color, #ffffff);
  box-shadow: 0 0 10px var(--spt-spinner-color, #ffffff);
  z-index: 1000000;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--spt-duration) ease-out;
}

body.spt-animating-out .spt-spinner-bar {
  transform: scaleX(1);
}

/* -------------------------------------------------------------
   Accessibility: Respect prefers-reduced-motion
   ------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  body.spt-active {
    transition: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
  .spt-curtain-overlay,
  .spt-floating-loader,
  .spt-spinner-bar {
    display: none !important;
  }
}