/**
 * Kursluk Central Global Page Loader Styles
 * Modern, high-performance CSS animations utilizing hardware-accelerated transforms & opacity.
 */

:root {
  --loader-bg: rgba(248, 250, 252, 0.94);
  --loader-ring-outer: var(--tenant-primary, #4f46e5);
  --loader-ring-inner: rgba(79, 70, 229, 0.25);
  --loader-logo-surface: #ffffff;
  --loader-shadow: rgba(79, 70, 229, 0.15);
}

html.dark,
html[data-theme="dark"] {
  --loader-bg: rgba(15, 23, 42, 0.95);
  --loader-ring-outer: var(--tenant-primary, #818cf8);
  --loader-ring-inner: rgba(129, 140, 248, 0.3);
  --loader-logo-surface: #1e293b;
  --loader-shadow: rgba(0, 0, 0, 0.4);
}

/* Base Container */
.kursluk-page-loader {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100vw;
  height: 100vh;
  z-index: 999999;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--loader-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  pointer-events: auto;
  user-select: none;
  opacity: 1;
  transform: scale(1);
  filter: blur(0px);
  will-change: opacity, transform, filter;
  transition: opacity 400ms cubic-bezier(0.4, 0, 0.2, 1),
              transform 400ms cubic-bezier(0.4, 0, 0.2, 1),
              filter 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Exit / Hiding State */
.kursluk-page-loader.kursluk-loader-hiding {
  opacity: 0 !important;
  transform: scale(1.03) !important;
  filter: blur(4px) !important;
  pointer-events: none !important;
}

/* Completely Hidden State */
.kursluk-page-loader.kursluk-loader-hidden {
  display: none !important;
  pointer-events: none !important;
  visibility: hidden !important;
}

/* Visual Wrapper */
.kursluk-loader-visual {
  position: relative;
  width: 104px;
  height: 104px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Outer Ring */
.kursluk-loader-ring-outer {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3px solid transparent;
  border-top-color: var(--loader-ring-outer);
  border-right-color: var(--loader-ring-outer);
  animation: kursluk-spin-cw 1.8s linear infinite;
  box-shadow: 0 0 16px var(--loader-shadow);
}

/* Inner Ring */
.kursluk-loader-ring-inner {
  position: absolute;
  inset: 10px;
  border-radius: 50%;
  border: 2.5px solid transparent;
  border-bottom-color: var(--loader-ring-inner);
  border-left-color: var(--loader-ring-inner);
  animation: kursluk-spin-ccw 1.2s linear infinite;
}

/* Centered Logo Container */
.kursluk-loader-logo {
  position: relative;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: var(--loader-logo-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  animation: kursluk-pulse 2.4s ease-in-out infinite;
  z-index: 2;
}

/* Logo Image */
.kursluk-loader-logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
}

/* Keyframe Animations */
@keyframes kursluk-spin-cw {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes kursluk-spin-ccw {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(-360deg); }
}

@keyframes kursluk-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(0.95); opacity: 0.92; }
}

/* Responsive Sizing (Mobile) */
@media (max-width: 640px) {
  .kursluk-loader-visual {
    width: 90px;
    height: 90px;
  }
  .kursluk-loader-ring-inner {
    inset: 8px;
  }
  .kursluk-loader-logo {
    width: 52px;
    height: 52px;
  }
  .kursluk-loader-logo-img {
    width: 34px;
    height: 34px;
  }
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .kursluk-loader-ring-outer,
  .kursluk-loader-ring-inner {
    animation-duration: 8s !important;
  }
  .kursluk-loader-logo {
    animation: none !important;
  }
  .kursluk-page-loader.kursluk-loader-hiding {
    transition: opacity 150ms linear !important;
    transform: none !important;
    filter: none !important;
  }
}

/* Print Output: Hide Page Loader Completely */
@media print {
  .kursluk-page-loader {
    display: none !important;
    opacity: 0 !important;
    pointer-events: none !important;
  }
}