/* ============================================================
   main.css
   index.html 専用スタイル
   ※ index.html のみ読み込む
============================================================ */

/* ----------------------------------------------------------
   Hero セクション：オーロラ背景グラデーション
---------------------------------------------------------- */
.hero-gradient {
  background: linear-gradient(125deg, #ffffff 0%, #f5f3ff 40%, #fdf2f8 70%, #ffffff 100%);
  background-size: 400% 400%;
  animation: gradient-flow 15s ease infinite;
}

@keyframes gradient-flow {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ----------------------------------------------------------
   Hero セクション：浮遊パーティクル
---------------------------------------------------------- */
.particle {
  position: absolute;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 50%;
  pointer-events: none;
  animation: float-particle 20s linear infinite;
}

@keyframes float-particle {
  0%   { transform: translateY(100vh) scale(0); opacity: 0; }
  50%  { opacity: 0.5; }
  100% { transform: translateY(-10vh) scale(1.5); opacity: 0; }
}

/* ----------------------------------------------------------
   About セクション：画像スライドフェード
---------------------------------------------------------- */
.about-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.5s ease;
}

.about-slide.active {
  opacity: 1;
}

/* ----------------------------------------------------------
   幾何学模様の背景アニメーション（Projects / Members）
---------------------------------------------------------- */
.bg-shapes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1;
  background: linear-gradient(135deg, #f3f4f6 0%, #ffffff 100%);
}

.shape {
  position: absolute;
  background: rgba(99, 102, 241, 0.05);
  animation: float 15s infinite linear;
}

@keyframes float {
  0%   { transform: translateY(0) rotate(0deg); }
  100% { transform: translateY(-1000px) rotate(360deg); }
}

/* ----------------------------------------------------------
   メンバーカード
---------------------------------------------------------- */
.member-card {
  transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.member-card:hover {
  transform: translateY(-8px);
  box-shadow:
    0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.member-img-wrap {
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
  transition: clip-path 0.4s ease;
}

.member-card:hover .member-img-wrap {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.member-card img {
  transition: transform 0.6s ease;
}

.member-card:hover img {
  transform: scale(1.1);
}

/* ----------------------------------------------------------
   メンバー詳細モーダル
---------------------------------------------------------- */
.modal-overlay {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  transform: scale(0.9) translateY(20px);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.active .modal-content {
  transform: scale(1) translateY(0);
  opacity: 1;
}

/* ----------------------------------------------------------
   メンバーモーダル：画像スライダー
---------------------------------------------------------- */
.slider-container {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.65, 0, 0.35, 1);
  width: 300%;
}

.slide {
  width: 33.333%;
  flex-shrink: 0;
}