/**
 * Page Transition Styles
 * Phase 5: Seamless page navigation experience
 */

/* ================================
   ページトランジション - オーバーレイ
   ================================ */

.page-transition-overlay {
  position: fixed;
  inset: 0;
  background: var(--primary-600);
  z-index: 10000;
  pointer-events: none;
  opacity: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s ease;
}

.page-transition-overlay.active {
  opacity: 1;
  pointer-events: all;
}

[data-theme="dark"] .page-transition-overlay {
  background: var(--gray-900);
}

/* ================================
   トランジションシェイプ
   ================================ */

.transition-shape {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-500), var(--accent-purple));
  transition: clip-path 0.6s cubic-bezier(0.85, 0, 0.15, 1);
}

[data-theme="dark"] .transition-shape {
  background: linear-gradient(135deg, var(--primary-600), var(--accent-purple));
}

/* Circle Transition (Default) */
.page-transition-overlay[data-transition-type="circle"] .transition-shape {
  clip-path: circle(0% at 50% 50%);
}

.page-transition-overlay[data-transition-type="circle"].transitioning-out .transition-shape {
  clip-path: circle(150% at 50% 50%);
}

.page-transition-overlay[data-transition-type="circle"].transitioning-in .transition-shape {
  clip-path: circle(150% at 50% 50%);
}

.page-transition-overlay[data-transition-type="circle"].transitioning-in.active .transition-shape {
  clip-path: circle(0% at 50% 50%);
}

/* Slide Transition */
.page-transition-overlay[data-transition-type="slide"] .transition-shape {
  clip-path: polygon(0 0, 0 0, 0 100%, 0 100%);
}

.page-transition-overlay[data-transition-type="slide"].transitioning-out .transition-shape {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.page-transition-overlay[data-transition-type="slide"].transitioning-in .transition-shape {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.page-transition-overlay[data-transition-type="slide"].transitioning-in.active .transition-shape {
  clip-path: polygon(100% 0, 100% 0, 100% 100%, 100% 100%);
}

/* Fade Transition */
.page-transition-overlay[data-transition-type="fade"] .transition-shape {
  opacity: 0;
  clip-path: none;
  transition: opacity 0.6s ease;
}

.page-transition-overlay[data-transition-type="fade"].transitioning-out .transition-shape {
  opacity: 1;
}

/* ================================
   トランジションロゴ
   ================================ */

.transition-logo {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  z-index: 1;
}

.transition-logo-text {
  font-size: var(--text-5xl);
  font-weight: var(--font-extrabold);
  color: white;
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  transition-delay: 0.2s;
  background: linear-gradient(
    135deg,
    var(--accent-pink),
    var(--accent-purple),
    var(--accent-cyan)
  );
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradient-shift 3s ease infinite;
}

.page-transition-overlay.active .transition-logo-text {
  opacity: 1;
  transform: scale(1);
}

/* トランジションローダー */
.transition-loader {
  width: 60px;
  height: 60px;
  position: relative;
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  transition-delay: 0.3s;
}

.page-transition-overlay.active .transition-loader {
  opacity: 1;
  transform: scale(1);
}

.transition-loader::before,
.transition-loader::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 3px solid transparent;
  border-top-color: var(--accent-pink);
  border-right-color: var(--accent-purple);
  border-bottom-color: var(--accent-cyan);
  border-radius: 50%;
  animation: loader-spin 1s linear infinite;
}

.transition-loader::after {
  border: 3px solid transparent;
  border-top-color: var(--accent-cyan);
  border-right-color: var(--accent-pink);
  border-bottom-color: var(--accent-purple);
  animation: loader-spin 0.7s linear infinite reverse;
  inset: 8px;
}

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

/* ================================
   ページロードアニメーション
   ================================ */

.page-load-fade-in {
  opacity: 0;
  animation: page-load-fade-in 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes page-load-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.page-load-slide-up {
  opacity: 0;
  transform: translateY(30px);
  animation: page-load-slide-up 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes page-load-slide-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-load-scale-in {
  opacity: 0;
  transform: scale(0.9);
  animation: page-load-scale-in 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes page-load-scale-in {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ================================
   高度なローディング状態
   ================================ */

.advanced-loader {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.advanced-loader.active {
  opacity: 1;
  pointer-events: all;
}

.loader-content {
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  min-width: 250px;
  box-shadow: var(--shadow-2xl);
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.advanced-loader.active .loader-content {
  transform: scale(1);
}

/* ローディングスピナー */
.loader-spinner {
  position: relative;
  width: 80px;
  height: 80px;
}

.spinner-ring {
  position: absolute;
  inset: 0;
  border: 4px solid transparent;
  border-radius: 50%;
  animation: spinner-rotate 1.5s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.spinner-ring:nth-child(1) {
  border-top-color: var(--accent-pink);
  animation-delay: -0.45s;
}

.spinner-ring:nth-child(2) {
  border-top-color: var(--accent-purple);
  animation-delay: -0.3s;
  inset: 8px;
}

.spinner-ring:nth-child(3) {
  border-top-color: var(--accent-cyan);
  animation-delay: -0.15s;
  inset: 16px;
}

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

/* ローディングメッセージ */
.loader-message {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  text-align: center;
}

/* プログレスバー */
.loader-progress {
  width: 100%;
  height: 6px;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

[data-theme="dark"] .loader-progress {
  background: var(--gray-700);
}

.loader-progress-bar {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--accent-pink),
    var(--accent-purple),
    var(--accent-cyan)
  );
  background-size: 200% 100%;
  animation: gradient-shift 2s ease infinite;
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
  width: 0%;
}

/* ================================
   レスポンシブ調整
   ================================ */

@media (max-width: 768px) {
  .transition-logo-text {
    font-size: var(--text-3xl);
  }

  .transition-loader {
    width: 50px;
    height: 50px;
  }

  .loader-content {
    padding: 1.5rem;
    min-width: 200px;
  }

  .loader-spinner {
    width: 60px;
    height: 60px;
  }

  .loader-message {
    font-size: var(--text-base);
  }
}

/* ================================
   アクセシビリティ: モーション削減
   ================================ */

@media (prefers-reduced-motion: reduce) {
  .page-transition-overlay,
  .transition-shape,
  .transition-logo-text,
  .transition-loader,
  .page-load-fade-in,
  .page-load-slide-up,
  .page-load-scale-in,
  .advanced-loader,
  .loader-content {
    animation: none !important;
    transition: none !important;
  }

  .page-transition-overlay {
    display: none !important;
  }

  .page-load-fade-in,
  .page-load-slide-up,
  .page-load-scale-in {
    opacity: 1 !important;
    transform: none !important;
  }
}