/**
 * RIFF テーマ - ローディング画面用CSS
 *
 * @package RIFF
 */

/* ==========================================================================
   ローディング画面基本設定
   ========================================================================== */

/* CSS変数の定義 */
:root {
  --riff-loading-bg-color: #ffffff;
  --riff-loading-text-color: #333333;
  --riff-loading-accent-color: #1e73be;
  --riff-loading-logo-size: 80px;
  --riff-loading-logo-max-width: 300px;
  --riff-loading-logo-max-height: 200px;
  --riff-loading-text-size: 24px;
  --riff-loading-duration: 0.8s;
  --riff-loading-delay: 0.3s;
}

/* ローディング画面メイン */
#riff-loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--riff-loading-bg-color);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  visibility: visible;
  transition: opacity var(--riff-loading-duration) ease,
    visibility var(--riff-loading-duration) ease;
  overflow: hidden;
}

/* フェードアウト状態 */
#riff-loading-screen.fade-out {
  opacity: 0;
  visibility: hidden;
}

/* ローディングコンテンツコンテナ */
.riff-loading-content {
  text-align: center;
  max-width: 90%;
  animation: riffLoadingFadeIn var(--riff-loading-duration) ease
    var(--riff-loading-delay) both;
}

/* ローディングロゴ */
.riff-loading-logo {
  margin-bottom: 20px;
  opacity: 0;
  animation: riffLoadingLogoFade var(--riff-loading-duration) ease
    calc(var(--riff-loading-delay) + 0.2s) both;
}

.riff-loading-logo img {
  width: var(--riff-loading-logo-size);
  height: var(--riff-loading-logo-size);
  max-width: var(--riff-loading-logo-max-width);
  max-height: var(--riff-loading-logo-max-height);
  min-width: 40px;
  min-height: 40px;
  object-fit: contain;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.1));
  transition: transform 0.3s ease;
}

/* ローディングテキスト */
.riff-loading-text {
  font-size: var(--riff-loading-text-size);
  color: var(--riff-loading-text-color);
  font-weight: 300;
  letter-spacing: 2px;
  margin-bottom: 30px;
  opacity: 0;
  animation: riffLoadingTextFade var(--riff-loading-duration) ease
    calc(var(--riff-loading-delay) + 0.4s) both;
}

/* ローディングスピナーコンテナ */
.riff-loading-spinner {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 20px;
  opacity: 0;
  animation: riffLoadingSpinnerFade var(--riff-loading-duration) ease
    calc(var(--riff-loading-delay) + 0.6s) both;
}

/* ==========================================================================
   スピナーアニメーション（3種類）
   ========================================================================== */

/* スピナータイプ1: シンプルな円形 */
.riff-spinner-circle {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(30, 115, 190, 0.1);
  border-top: 3px solid var(--riff-loading-accent-color);
  border-radius: 50%;
  animation: riffSpinnerRotate 1s linear infinite;
}

/* スピナータイプ2: ドット */
.riff-spinner-dots {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
}

.riff-spinner-dots .dot {
  width: 8px;
  height: 8px;
  background-color: var(--riff-loading-accent-color);
  border-radius: 50%;
  animation: riffSpinnerDots 1.4s ease-in-out infinite both;
}

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

/* スピナータイプ3: パルス */
.riff-spinner-pulse {
  display: flex;
  gap: 6px;
  align-items: center;
  justify-content: center;
}

.riff-spinner-pulse .bar {
  width: 4px;
  height: 20px;
  background-color: var(--riff-loading-accent-color);
  border-radius: 2px;
  animation: riffSpinnerPulse 1.2s ease-in-out infinite;
}

.riff-spinner-pulse .bar:nth-child(1) {
  animation-delay: -0.4s;
}
.riff-spinner-pulse .bar:nth-child(2) {
  animation-delay: -0.3s;
}
.riff-spinner-pulse .bar:nth-child(3) {
  animation-delay: -0.2s;
}
.riff-spinner-pulse .bar:nth-child(4) {
  animation-delay: -0.1s;
}
.riff-spinner-pulse .bar:nth-child(5) {
  animation-delay: 0s;
}

/* ==========================================================================
   プログレスバー（オプション）
   ========================================================================== */

.riff-loading-progress {
  width: 200px;
  height: 2px;
  background-color: rgba(30, 115, 190, 0.1);
  border-radius: 1px;
  margin: 20px auto 0;
  overflow: hidden;
  opacity: 0;
  animation: riffLoadingProgressFade var(--riff-loading-duration) ease
    calc(var(--riff-loading-delay) + 0.8s) both;
}

.riff-loading-progress-bar {
  height: 100%;
  background-color: var(--riff-loading-accent-color);
  border-radius: 1px;
  width: 0;
  animation: riffLoadingProgress 2s ease-in-out infinite;
}

/* ==========================================================================
   アニメーション定義
   ========================================================================== */

/* フェードインアニメーション */
@keyframes riffLoadingFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes riffLoadingLogoFade {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes riffLoadingTextFade {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes riffLoadingSpinnerFade {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes riffLoadingProgressFade {
  from {
    opacity: 0;
    transform: scaleX(0);
  }
  to {
    opacity: 1;
    transform: scaleX(1);
  }
}

/* スピナーアニメーション */
@keyframes riffSpinnerRotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes riffSpinnerDots {
  0%,
  80%,
  100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes riffSpinnerPulse {
  0%,
  40%,
  100% {
    transform: scaleY(0.4);
    opacity: 0.5;
  }
  20% {
    transform: scaleY(1);
    opacity: 1;
  }
}

@keyframes riffLoadingProgress {
  0% {
    width: 0;
    transform: translateX(-100%);
  }
  50% {
    width: 100%;
    transform: translateX(0);
  }
  100% {
    width: 100%;
    transform: translateX(100%);
  }
}

/* ==========================================================================
   レスポンシブデザイン
   ========================================================================== */

@media (max-width: 991px) {
  :root {
    --riff-loading-logo-max-width: 250px;
    --riff-loading-logo-max-height: 150px;
    --riff-loading-text-size: 20px;
  }

  .riff-loading-content {
    max-width: 95%;
  }

  .riff-loading-logo {
    margin-bottom: 15px;
  }

  .riff-loading-logo img {
    max-width: min(
      var(--riff-loading-logo-size),
      var(--riff-loading-logo-max-width)
    );
    max-height: min(
      var(--riff-loading-logo-size),
      var(--riff-loading-logo-max-height)
    );
  }

  .riff-loading-text {
    margin-bottom: 25px;
    letter-spacing: 1.5px;
  }
}

@media (max-width: 767px) {
  :root {
    --riff-loading-logo-max-width: 200px;
    --riff-loading-logo-max-height: 120px;
    --riff-loading-text-size: 18px;
  }

  .riff-loading-logo {
    margin-bottom: 12px;
  }

  .riff-loading-logo img {
    max-width: min(
      var(--riff-loading-logo-size),
      var(--riff-loading-logo-max-width)
    );
    max-height: min(
      var(--riff-loading-logo-size),
      var(--riff-loading-logo-max-height)
    );
  }

  .riff-loading-text {
    margin-bottom: 20px;
    letter-spacing: 1px;
  }

  .riff-spinner-circle {
    width: 32px;
    height: 32px;
    border-width: 2px;
  }

  .riff-spinner-dots .dot {
    width: 6px;
    height: 6px;
  }

  .riff-spinner-pulse .bar {
    width: 3px;
    height: 16px;
  }

  .riff-loading-progress {
    width: 150px;
    height: 1px;
  }
}

@media (max-width: 480px) {
  :root {
    --riff-loading-logo-max-width: 150px;
    --riff-loading-logo-max-height: 100px;
    --riff-loading-text-size: 16px;
  }

  .riff-loading-logo {
    margin-bottom: 10px;
  }

  .riff-loading-logo img {
    max-width: min(
      var(--riff-loading-logo-size),
      var(--riff-loading-logo-max-width)
    );
    max-height: min(
      var(--riff-loading-logo-size),
      var(--riff-loading-logo-max-height)
    );
  }

  .riff-loading-text {
    margin-bottom: 15px;
    letter-spacing: 0.5px;
  }

  .riff-spinner-circle {
    width: 28px;
    height: 28px;
  }

  .riff-spinner-dots .dot {
    width: 5px;
    height: 5px;
    gap: 6px;
  }

  .riff-spinner-pulse .bar {
    width: 2px;
    height: 12px;
  }

  .riff-loading-progress {
    width: 120px;
  }
}

/* ==========================================================================
   特別なテーマバリエーション
   ========================================================================== */

/* ダークテーマ */
.riff-loading-dark {
  --riff-loading-bg-color: #1a1a1a;
  --riff-loading-text-color: #ffffff;
  --riff-loading-accent-color: #3a97e4;
}

/* ミニマルテーマ */
.riff-loading-minimal .riff-loading-logo {
  filter: grayscale(100%);
  opacity: 0.8;
}

.riff-loading-minimal .riff-loading-text {
  font-weight: 100;
  letter-spacing: 4px;
}

/* エレガントテーマ */
.riff-loading-elegant .riff-loading-logo {
  filter: drop-shadow(0 4px 16px rgba(0, 0, 0, 0.15));
}

.riff-loading-elegant .riff-loading-text {
  font-family: "Times New Roman", Times, serif;
  font-weight: 400;
  letter-spacing: 3px;
  text-transform: uppercase;
}

/* ==========================================================================
   アクセシビリティ配慮
   ========================================================================== */

/* モーション削減設定を尊重 */
@media (prefers-reduced-motion: reduce) {
  #riff-loading-screen,
  .riff-loading-content,
  .riff-loading-logo,
  .riff-loading-text,
  .riff-loading-spinner,
  .riff-loading-progress {
    animation: none !important;
    transition: opacity 0.3s ease !important;
  }

  .riff-spinner-circle,
  .riff-spinner-dots .dot,
  .riff-spinner-pulse .bar,
  .riff-loading-progress-bar {
    animation: none !important;
  }

  /* シンプルなフェード効果のみ */
  .riff-loading-content {
    opacity: 1;
    transform: none;
  }

  .riff-loading-logo,
  .riff-loading-text,
  .riff-loading-spinner {
    opacity: 1;
  }
}

/* ハイコントラスト対応 */
@media (prefers-contrast: high) {
  :root {
    --riff-loading-bg-color: #ffffff;
    --riff-loading-text-color: #000000;
    --riff-loading-accent-color: #0000ff;
  }

  .riff-loading-logo img {
    filter: contrast(120%) brightness(110%);
  }

  .riff-loading-text {
    font-weight: 600;
    text-shadow: none;
  }

  .riff-spinner-circle {
    border-width: 4px;
  }
}

/* ==========================================================================
   プリント時の処理
   ========================================================================== */

@media print {
  #riff-loading-screen {
    display: none !important;
  }
}

/* ==========================================================================
   デバッグ用スタイル（開発時のみ）
   ========================================================================== */

.riff-loading-debug #riff-loading-screen {
  border: 3px dashed red;
  background-color: rgba(255, 0, 0, 0.1);
}

.riff-loading-debug .riff-loading-content {
  border: 2px dashed blue;
  background-color: rgba(0, 0, 255, 0.1);
}

/* ==========================================================================
   パフォーマンス最適化
   ========================================================================== */

/* GPU加速の有効化 */
#riff-loading-screen,
.riff-loading-content,
.riff-loading-logo img,
.riff-spinner-circle,
.riff-spinner-dots .dot,
.riff-spinner-pulse .bar {
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
}

/* アニメーション完了後のwill-changeをリセット */
#riff-loading-screen.fade-out {
  will-change: auto;
}

/* ==========================================================================
   カスタマイザー用フック
   ========================================================================== */

/* カスタムCSS変数のプレースホルダー */
.riff-loading-custom-styles {
  /* カスタマイザーで設定されたスタイルがここに適用される */
  /* 利用可能な変数:
     --riff-loading-bg-color
     --riff-loading-text-color
     --riff-loading-accent-color
     --riff-loading-logo-size
     --riff-loading-logo-max-width
     --riff-loading-logo-max-height
     --riff-loading-duration
  */
}