/* 共通スタイル設定 */
body {
  font-family: "Noto Sans JP", sans-serif;
}

.font-serif {
  font-family: "Noto Serif JP", serif;
}

/* 背景パターン */
.geometric-bg {
  background-image: radial-gradient(#e5e7eb 1px, transparent 1px);
  background-size: 20px 20px;
}

/* アニメーション - フェードインアップ */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Floating Bars（流れる装飾バー） */
.floating-bar {
  position: absolute;
  height: 60px;
  width: 400px;
  opacity: 0;
  border-radius: 4px;
  z-index: 0;
  pointer-events: none;
}

.bar-white {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.5) 0%,
    rgba(255, 255, 255, 0) 100%
  );
}

.bar-blue {
  background: linear-gradient(
    90deg,
    rgba(191, 219, 254, 0.4) 0%,
    rgba(191, 219, 254, 0) 100%
  );
}

.bar-teal {
  background: linear-gradient(
    90deg,
    rgba(153, 246, 228, 0.4) 0%,
    rgba(153, 246, 228, 0) 100%
  );
}

.bar-gradient {
  background: linear-gradient(
    90deg,
    transparent,
    rgba(59, 130, 246, 0.5),
    transparent
  );
}

/* フロートアニメーション */
@keyframes floatRight {
  0% {
    transform: translateX(-100%) skewX(-20deg);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    transform: translateX(120vw) skewX(-20deg);
    opacity: 0;
  }
}

@keyframes floatLeft {
  0% {
    transform: translateX(120vw) rotate(180deg) skewX(-20deg);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    transform: translateX(-100%) rotate(180deg) skewX(-20deg);
    opacity: 0;
  }
}

@keyframes floatSlow {
  0% {
    transform: translateX(-100%);
    opacity: 0;
  }
  20% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    transform: translateX(100vw);
    opacity: 0;
  }
}

.anim-right {
  animation: floatRight 15s linear infinite;
}

.anim-left {
  animation: floatLeft 18s linear infinite;
}

.anim-float {
  animation: floatSlow 20s linear infinite;
}

.anim-fast {
  animation-duration: 12s;
}

.anim-slow {
  animation-duration: 25s;
}

/* 画像ズームエフェクト */
.img-zoom-container {
  overflow: hidden;
}

.img-zoom {
  transition: transform 0.7s ease;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.group:hover .img-zoom {
  transform: scale(1.05);
}

/* スクロールバー非表示 */
.no-scrollbar::-webkit-scrollbar {
  display: none;
}

.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

/* 遅延アニメーション用クラス */
.delay-0 {
  animation-delay: 0s;
}

.delay-1 {
  animation-delay: 1s;
}

.delay-2 {
  animation-delay: 2s;
}

.delay-3 {
  animation-delay: 3s;
}

.delay-4 {
  animation-delay: 4s;
}

.delay-5 {
  animation-delay: 5s;
}

/* ハンバーガーメニュー用スタイル */
.hamburger-btn {
  z-index: 60; /* ヘッダーより手前 */
  cursor: pointer;
  width: 48px;
  height: 48px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 3本線 */
.hamburger-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: currentColor; /* 親要素のtext色を引き継ぐ */
  position: absolute;
  transition: all 0.3s ease-in-out;
}

.hamburger-btn span:nth-child(1) {
  transform: translateY(-8px);
}
.hamburger-btn span:nth-child(2) {
  opacity: 1;
}
.hamburger-btn span:nth-child(3) {
  transform: translateY(8px);
}

/* 開いた状態（×印になる） */
.hamburger-btn.is-active span:nth-child(1) {
  transform: translateY(0) rotate(45deg);
}
.hamburger-btn.is-active span:nth-child(2) {
  opacity: 0;
}
.hamburger-btn.is-active span:nth-child(3) {
  transform: translateY(0) rotate(-45deg);
}

/* モバイルメニュー本体 */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: rgba(255, 255, 255, 0.98); /* ほぼ不透明な白 */
  z-index: 50;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu.is-active {
  opacity: 1;
  visibility: visible;
}

/* スクロールロック（メニューが開いている時） */
body.menu-open {
  overflow: hidden;
}