/* 株式会社ゼータプラス - パーティクルとインタラクティブ背景アニメーション */

/* パーティクル背景 */
.particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 0;
  pointer-events: none;
}

/* 幾何学模様のアニメーション背景 */
.geometric-bg {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  overflow: hidden;
  z-index: -1;
  opacity: 0.6;
}

.geometric-shape {
  position: absolute;
  border-radius: 50%;
  background: var(--primary-color);
  animation: float-around 15s infinite ease-in-out;
  opacity: 0.1;
}

.geometric-shape:nth-child(1) {
  width: 300px;
  height: 300px;
  top: -150px;
  left: -100px;
  animation-duration: 45s;
  background: linear-gradient(45deg, var(--primary-color), transparent);
}

.geometric-shape:nth-child(2) {
  width: 200px;
  height: 200px;
  top: 30%;
  right: -100px;
  animation-duration: 35s;
  animation-delay: 2s;
  border-radius: 30%;
  background: linear-gradient(-45deg, var(--secondary-color), transparent);
}

.geometric-shape:nth-child(3) {
  width: 150px;
  height: 150px;
  bottom: 10%;
  left: 20%;
  animation-duration: 40s;
  animation-delay: 5s;
  border-radius: 20%;
  background: radial-gradient(var(--primary-color), transparent);
}

@keyframes float-around {
  0% {
    transform: translateY(0) translateX(0) rotate(0);
  }
  33% {
    transform: translateY(100px) translateX(100px) rotate(120deg);
  }
  66% {
    transform: translateY(-50px) translateX(50px) rotate(240deg);
  }
  100% {
    transform: translateY(0) translateX(0) rotate(360deg);
  }
}

/* 流れる背景グラデーション */
.gradient-flow-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    125deg,
    rgba(92, 189, 185, 0.05),
    rgba(92, 189, 185, 0.02) 30%,
    rgba(51, 51, 51, 0.02) 70%,
    rgba(51, 51, 51, 0.05)
  );
  background-size: 400% 400%;
  animation: gradient-shift 15s ease infinite;
  z-index: -1;
}

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

/* 浮遊する円形要素 */
.floating-circles-container {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  overflow: hidden;
  z-index: -1;
}

.floating-circle {
  position: absolute;
  border-radius: 50%;
  background-color: var(--primary-color);
  opacity: 0.05;
  animation: circle-float 20s infinite ease-in-out;
}

.floating-circle:nth-child(1) {
  width: 100px;
  height: 100px;
  top: 20%;
  left: 10%;
}

.floating-circle:nth-child(2) {
  width: 150px;
  height: 150px;
  top: 40%;
  right: 15%;
  animation-delay: 3s;
  animation-duration: 15s;
}

.floating-circle:nth-child(3) {
  width: 80px;
  height: 80px;
  bottom: 25%;
  left: 20%;
  animation-delay: 7s;
  animation-duration: 18s;
}

.floating-circle:nth-child(4) {
  width: 120px;
  height: 120px;
  bottom: 10%;
  right: 25%;
  animation-delay: 5s;
  animation-duration: 22s;
}

@keyframes circle-float {
  0%, 100% {
    transform: translateY(0) translateX(0);
  }
  25% {
    transform: translateY(-20px) translateX(10px);
  }
  50% {
    transform: translateY(10px) translateX(20px);
  }
  75% {
    transform: translateY(15px) translateX(-10px);
  }
}

/* 3Dカードティルト効果 */
.tilt-card {
  transform-style: preserve-3d;
  transform: perspective(1000px);
  transition: transform 0.5s ease;
}

.tilt-card-inner {
  transform: translateZ(20px);
  transition: transform 0.5s ease;
}

.tilt-card:hover {
  transform: perspective(1000px) rotateX(5deg) rotateY(5deg);
}

.tilt-card:hover .tilt-card-inner {
  transform: translateZ(30px);
}

/* ホバーアクセント効果 */
.hover-accent {
  position: relative;
  overflow: hidden;
}

.hover-accent::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

.hover-accent:hover::before {
  left: 100%;
}