/* アニメーション基本設定 */
:root {
  --animation-duration: 0.8s;
  --animation-delay-base: 0.1s;
  --animation-timing: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ページロード時のアニメーション */
.fade-in {
  opacity: 0;
  animation: fadeIn var(--animation-duration) var(--animation-timing) forwards;
}

.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp var(--animation-duration) var(--animation-timing) forwards;
}

.fade-in-delay {
  opacity: 0;
  animation: fadeIn var(--animation-duration) var(--animation-timing) 0.5s forwards;
}

.slide-down {
  opacity: 0;
  transform: translateY(-20px);
  animation: slideDown var(--animation-duration) var(--animation-timing) forwards;
}

.bounce-in {
  opacity: 0;
  transform: scale(0.8);
  animation: bounceIn 1s cubic-bezier(0.215, 0.610, 0.355, 1.000) forwards;
}

/* スクロールアニメーション用の初期状態 */
.scroll-reveal {
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 見出しのアニメーション */
.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.visible .slide-in-left,
.visible .slide-in-right {
  opacity: 1;
  transform: translateX(0);
}

/* アイコン回転アニメーション */
.rotate-in {
  opacity: 0;
  transform: rotate(-180deg) scale(0.5);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.visible .rotate-in {
  opacity: 1;
  transform: rotate(0) scale(1);
}

/* カードアニメーション */
.card-container {
  display: flex;
  flex-wrap: wrap;
}

.card-item {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.4s ease;
}

.visible .card-item {
  opacity: 1;
  transform: translateY(0);
}

/* カードの遅延表示 */
.visible .card-item:nth-child(1) {
  transition-delay: 0.1s;
}

.visible .card-item:nth-child(2) {
  transition-delay: 0.2s;
}

.visible .card-item:nth-child(3) {
  transition-delay: 0.3s;
}

/* 天気情報のアニメーション */
.weather-container {
  display: flex;
  flex-wrap: wrap;
}

.weather-item {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.5s ease;
}

.visible .weather-item {
  opacity: 1;
  transform: scale(1);
}

.visible .weather-item:nth-child(1) {
  transition-delay: 0.1s;
}

.visible .weather-item:nth-child(2) {
  transition-delay: 0.3s;
}

/* ホバーエフェクト */
.card-item a {
  display: block;
  transition: all 0.3s ease;
  overflow: hidden;
}

.card-item a:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.card-item a img {
  transition: transform 0.5s ease;
}

.card-item a:hover img {
  transform: scale(1.05);
}

/* ボタンのパルスアニメーション */
.pulse {
  position: relative;
}

.pulse a {
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.pulse a:hover {
  transform: translateY(-2px);
}

.pulse a:hover::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 120%;
  height: 120%;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  animation: pulse 0.8s ease-out;
}

/* ナビゲーションアニメーション */
.nav-item {
  opacity: 0;
  animation: fadeInRight var(--animation-duration) var(--animation-timing) forwards;
}

.nav-item:nth-child(1) { animation-delay: calc(var(--animation-delay-base) * 1); }
.nav-item:nth-child(2) { animation-delay: calc(var(--animation-delay-base) * 2); }
.nav-item:nth-child(3) { animation-delay: calc(var(--animation-delay-base) * 3); }
.nav-item:nth-child(4) { animation-delay: calc(var(--animation-delay-base) * 4); }
.nav-item:nth-child(5) { animation-delay: calc(var(--animation-delay-base) * 5); }
.nav-item:nth-child(6) { animation-delay: calc(var(--animation-delay-base) * 6); }

/* キーフレームアニメーション */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

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

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.8);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  70% { transform: scale(0.95); }
  100% { transform: scale(1); }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

/* レスポンシブ対応 */
@media screen and (max-width: 768px) {
  .card-container {
    flex-direction: column;
  }
  
  .weather-container {
    flex-direction: column;
  }
  
  .slide-in-left,
  .slide-in-right {
    transform: translateX(0);
    opacity: 0;
  }
  
  .visible .slide-in-left,
  .visible .slide-in-right {
    transform: translateY(0);
    opacity: 1;
  }
}