/* =====================================================
   妙傳寺サイト 共通アニメーション
   ===================================================== */

/* === 動きを減らす設定をしているユーザーへの配慮 === */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .sakura-container, .snow-container, .leaves-container { display: none !important; }
}

html { scroll-behavior: smooth; }

/* ==================================
   1-A. スクロール連動フェードイン
   ================================== */
body.has-fade-in .fade-target {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s ease, transform 0.9s ease;
  will-change: opacity, transform;
}
body.has-fade-in .fade-target.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==================================
   1-B. ヒーロー Ken Burns
   ================================== */
section.hero {
  position: relative;
  overflow: hidden;
}
section.hero::before {
  content: "";
  position: absolute;
  inset: -8%;
  background-image: url('temple.jpg');
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  z-index: 0;
  animation: kenBurns 32s ease-in-out infinite alternate;
  will-change: transform;
}
section.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(0,0,0,0.05), rgba(0,0,0,0.05));
  z-index: 1;
  pointer-events: none;
}
section.hero > * { position: relative; z-index: 2; }
@keyframes kenBurns {
  0%   { transform: scale(1.0) translate(0, 0); }
  100% { transform: scale(1.12) translate(-2%, -2%); }
}

/* ==================================
   3-B. ヘッダー追従(下スクロールで隠れる)
   ================================== */
header {
  transition: transform 0.35s ease, box-shadow 0.3s ease;
}
header.is-hidden {
  transform: translateY(-100%);
}
header.is-scrolled {
  box-shadow: 0 4px 18px rgba(0,0,0,0.08);
}

/* ==================================
   3-C. スクロール進行バー
   ================================== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, #E6B422 0%, #D48A94 100%);
  z-index: 2000;
  pointer-events: none;
  transition: width 0.08s linear;
}

/* ==================================
   3-D. トップへ戻るボタン
   ================================== */
.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 50px;
  height: 50px;
  background: #E6B422;
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(0,0,0,0.18);
  opacity: 0;
  transform: translateY(20px) scale(0.85);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease, background 0.2s ease;
  z-index: 998;
  font-family: inherit;
}
.back-to-top.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.back-to-top:hover { background: #cfa11d; }
.back-to-top:active { transform: translateY(0) scale(0.95); }
@media (max-width: 768px) {
  .back-to-top { right: 16px; bottom: 16px; width: 44px; height: 44px; font-size: 1.2rem; }
}

/* ==================================
   3-A. カードホバー演出強化
   ================================== */
.deity-card,
.feature-card,
.prayer-card,
.amulet-card,
.issue-card,
.news-item,
.timeline-item,
.card,
.faq-item,
.event-item,
.grounds-item {
  transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.3s ease;
}
.deity-card:hover,
.feature-card:hover,
.prayer-card:hover,
.amulet-card:hover,
.issue-card:hover,
.news-item:hover,
.timeline-item:hover,
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.10);
}
.deity-card,
.event-item,
.grounds-item {
  overflow: hidden;
}
.deity-card .deity-photo,
.event-item .event-photo,
.grounds-item .grounds-photo,
.feature-card img {
  transition: transform 0.7s ease;
}
.deity-card:hover .deity-photo,
.event-item:hover .event-photo,
.grounds-item:hover .grounds-photo,
.feature-card:hover img {
  transform: scale(1.045);
}

/* ==================================
   3-E. ボタン リップル(波紋)効果
   ================================== */
button,
.submit-btn,
.back-btn,
.home-btn,
.download-btn,
.card-link,
.toc-grid a,
nav.main-nav a {
  position: relative;
  overflow: hidden;
}
.ripple-effect {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  background: rgba(255, 255, 255, 0.55);
  pointer-events: none;
  animation: rippleAnim 0.7s ease-out forwards;
  z-index: 1;
}
@keyframes rippleAnim {
  to { transform: scale(2.4); opacity: 0; }
}

/* ==================================
   1-C. 桜の花びら
   ================================== */
.sakura-container,
.snow-container,
.leaves-container {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100vh;
  pointer-events: none;
  z-index: 90;
  overflow: hidden;
}
.sakura {
  position: absolute;
  top: -20px;
  width: 14px;
  height: 14px;
  background: radial-gradient(circle at 30% 30%, #FFE3EB 0%, #FBC1CD 50%, #F297AC 100%);
  border-radius: 50% 0 50% 50%;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.05));
  animation-name: sakuraFall;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  will-change: transform;
}
.sakura.s2 {
  width: 11px;
  height: 11px;
  animation-name: sakuraFallSway;
}
.sakura.s3 {
  width: 16px;
  height: 16px;
  animation-name: sakuraFallSlow;
}
@keyframes sakuraFall {
  0%   { transform: translate3d(0, -10vh, 0) rotate(0deg); }
  100% { transform: translate3d(40px, 110vh, 0) rotate(720deg); }
}
@keyframes sakuraFallSway {
  0%   { transform: translate3d(0, -10vh, 0) rotate(0deg); }
  50%  { transform: translate3d(-50px, 50vh, 0) rotate(360deg); }
  100% { transform: translate3d(20px, 110vh, 0) rotate(720deg); }
}
@keyframes sakuraFallSlow {
  0%   { transform: translate3d(0, -10vh, 0) rotate(0deg); }
  100% { transform: translate3d(-30px, 110vh, 0) rotate(540deg); }
}

/* ==================================
   2-A. 季節のパーティクル
   ================================== */

/* ❄ 冬の雪 */
.snowflake {
  position: absolute;
  top: -10px;
  width: 8px;
  height: 8px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(255,255,255,0.7);
  animation-name: snowFall;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  will-change: transform;
}
.snowflake.f2 { width: 5px; height: 5px; }
.snowflake.f3 { width: 11px; height: 11px; opacity: 0.8; }
@keyframes snowFall {
  0%   { transform: translate3d(0, -10vh, 0); }
  100% { transform: translate3d(40px, 110vh, 0); }
}

/* 🍁 秋の紅葉 */
.leaf {
  position: absolute;
  top: -20px;
  width: 14px;
  height: 14px;
  background: linear-gradient(135deg, #C75B12 0%, #E89B3F 50%, #CF7B33 100%);
  clip-path: polygon(50% 0%, 70% 30%, 100% 30%, 75% 50%, 100% 75%, 60% 70%, 50% 100%, 40% 70%, 0% 75%, 25% 50%, 0% 30%, 30% 30%);
  animation-name: leafFall;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  will-change: transform;
}
.leaf.l2 { background: linear-gradient(135deg, #B33A1F 0%, #D9603A 100%); }
.leaf.l3 { background: linear-gradient(135deg, #DDA147 0%, #E5C168 100%); width: 12px; height: 12px; }
@keyframes leafFall {
  0%   { transform: translate3d(0, -10vh, 0) rotate(0deg); }
  50%  { transform: translate3d(40px, 50vh, 0) rotate(360deg); }
  100% { transform: translate3d(-20px, 110vh, 0) rotate(720deg); }
}

/* 季節のアクセント色(背景の微小な変化) */
body.season-summer { /* 夏は涼やかなまま */ }
body.season-winter { /* 冬: 既存のクリーム色をやや冷たく */ }

/* ==================================
   4-C. 御守護神カードのモバイル横スワイプ
   ================================== */
@media (max-width: 768px) {
  .deity-detail {
    grid-template-columns: none !important;
    display: flex !important;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 16px;
    padding: 4px 4px 24px 4px;
    margin-left: -10px;
    margin-right: -10px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .deity-detail::-webkit-scrollbar { display: none; }
  .deity-detail > .deity-card {
    flex: 0 0 86%;
    scroll-snap-align: center;
  }
  /* スワイプ可能を視覚で示すヒント */
  .deity-detail::after {
    content: "← スワイプできます →";
    position: absolute;
    margin-top: -16px;
    font-size: 0.75rem;
    color: var(--text-gray, #888);
    text-align: center;
    width: 100%;
    pointer-events: none;
  }
  #deities { position: relative; }
}

/* スマホで back-to-top と被らないよう微調整 */
@media (max-width: 480px) {
  .scroll-progress { height: 2px; }
}