/* ===========================================
   AlivioMind - Loading Indicators
   Stunning page loaders and transitions
   =========================================== */

/* ===== Initial Page Loader ===== */
.page-loader {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition:
    opacity 0.6s ease,
    visibility 0.6s ease;
}

.page-loader.loaded {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Logo Animation */
.loader-logo {
  width: 120px;
  height: 120px;
  margin-bottom: var(--space-xl);
  position: relative;
}

.loader-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  animation: logoFloat 2s ease-in-out infinite;
}

@keyframes logoFloat {
  0%,
  100% {
    transform: translateY(0) scale(1);
    filter: drop-shadow(0 10px 30px rgba(45, 140, 140, 0.3));
  }
  50% {
    transform: translateY(-15px) scale(1.05);
    filter: drop-shadow(0 20px 40px rgba(45, 140, 140, 0.5));
  }
}

/* Loader Ring */
.loader-ring {
  position: absolute;
  inset: -15px;
  border: 3px solid transparent;
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: loaderSpin 1s linear infinite;
}

.loader-ring::before {
  content: "";
  position: absolute;
  inset: 5px;
  border: 3px solid transparent;
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: loaderSpin 0.8s linear reverse infinite;
}

@keyframes loaderSpin {
  to {
    transform: rotate(360deg);
  }
}

/* Loader Text */
.loader-text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--space-lg);
  opacity: 0;
  animation: loaderTextFade 2s ease infinite;
}

@keyframes loaderTextFade {
  0%,
  100% {
    opacity: 0.3;
  }
  50% {
    opacity: 1;
  }
}

/* Progress Bar */
.loader-progress {
  width: 200px;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.loader-progress-bar {
  height: 100%;
  background: var(--primary-gradient);
  border-radius: var(--radius-full);
  width: 0%;
  transition: width 0.3s ease;
  position: relative;
}

.loader-progress-bar::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 30px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4));
  animation: progressShine 1s ease infinite;
}

@keyframes progressShine {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* Dots Animation */
.loader-dots {
  display: flex;
  gap: 8px;
  margin-top: var(--space-lg);
}

.loader-dots span {
  width: 10px;
  height: 10px;
  background: var(--primary);
  border-radius: 50%;
  animation: dotBounce 1.4s ease-in-out infinite;
}

.loader-dots span:nth-child(1) {
  animation-delay: 0s;
}
.loader-dots span:nth-child(2) {
  animation-delay: 0.2s;
}
.loader-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes dotBounce {
  0%,
  80%,
  100% {
    transform: scale(0.6);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ===== Page Transition Loader ===== */
.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  z-index: 9999;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.page-transition.active {
  opacity: 1;
}

.page-transition-bar {
  height: 100%;
  background: var(--primary-gradient);
  width: 0%;
  transition: width 0.3s ease;
  box-shadow: 0 0 20px rgba(45, 140, 140, 0.6);
  position: relative;
}

.page-transition-bar::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 100px;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    var(--primary-light),
    transparent
  );
  animation: transitionPulse 1s ease infinite;
}

@keyframes transitionPulse {
  0%,
  100% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}

/* Page Transition Overlay */
.page-transition-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: 9998;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.page-transition-overlay.active {
  opacity: 1;
  visibility: visible;
}

.page-transition-content {
  text-align: center;
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.4s ease 0.2s;
}

.page-transition-overlay.active .page-transition-content {
  transform: translateY(0);
  opacity: 1;
}

.page-transition-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-lg);
  background: var(--primary-gradient);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: iconPulse 1s ease infinite;
}

.page-transition-icon svg {
  width: 28px;
  height: 28px;
  color: white;
}

@keyframes iconPulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

.page-transition-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.page-transition-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* Circular Spinner Alternative */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: loaderSpin 0.8s linear infinite;
}

/* Brain Tree Animation */
.brain-tree-loader {
  width: 80px;
  height: 80px;
  position: relative;
}

.brain-tree-loader svg {
  width: 100%;
  height: 100%;
  animation: brainTreePulse 2s ease-in-out infinite;
}

@keyframes brainTreePulse {
  0%,
  100% {
    transform: scale(1);
    filter: hue-rotate(0deg);
  }
  50% {
    transform: scale(1.1);
    filter: hue-rotate(15deg);
  }
}

/* Wave Animation */
.loader-wave {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 40px;
}

.loader-wave span {
  width: 6px;
  background: var(--primary);
  border-radius: var(--radius-full);
  animation: wave 1.2s ease-in-out infinite;
}

.loader-wave span:nth-child(1) {
  height: 20px;
  animation-delay: 0s;
}
.loader-wave span:nth-child(2) {
  height: 30px;
  animation-delay: 0.1s;
}
.loader-wave span:nth-child(3) {
  height: 40px;
  animation-delay: 0.2s;
}
.loader-wave span:nth-child(4) {
  height: 30px;
  animation-delay: 0.3s;
}
.loader-wave span:nth-child(5) {
  height: 20px;
  animation-delay: 0.4s;
}

@keyframes wave {
  0%,
  100% {
    transform: scaleY(0.5);
    opacity: 0.5;
  }
  50% {
    transform: scaleY(1);
    opacity: 1;
  }
}

/* ===== Page Enter/Exit Animations ===== */
.page-enter {
  animation: pageEnter 0.5s ease forwards;
}

.page-exit {
  animation: pageExit 0.3s ease forwards;
}

@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pageExit {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-20px);
  }
}

/* Slide Variations */
.page-slide-left {
  animation: slideLeft 0.5s ease forwards;
}

.page-slide-right {
  animation: slideRight 0.5s ease forwards;
}

@keyframes slideLeft {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideRight {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}