Modal / 12 フェアリーテイル｜Fairy Tale

<!-- モーダルを開くボタン -->
<button class="modal-button">Fairy Tale Modal</button>

<!-- モーダルの背景マスク -->
<div class="mask"></div>

<!-- モーダル本体 -->
<div class="modal">
  <div class="modal-content">
    <p>【Fairy Tale Modal】</p>
    <p>パステルカラーと浮遊パーティクルの幻想的なモーダルです。</p>
    <div class="close-btn-container">
      <button class="close-btn">Close</button>
    </div>
  </div>
</div>

/* 開くボタンのスタイル */
.modal-button {
  padding: 15px 30px;
  background: linear-gradient(45deg, #ff9a9e, #fecfef, #fecfef, #ff9a9e);
  background-size: 300% 300%;
  color: #fff;
  border: none;
  border-radius: 25px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  animation: gradientShift 3s ease infinite;
  box-shadow: 0 4px 15px rgba(255, 154, 158, 0.4);
}

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

.modal-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255, 154, 158, 0.6);
}

/* 背景マスクスタイル */
.mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 154, 158, 0.8);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.mask.appear {
  opacity: 1;
  visibility: visible;
}

/* モーダル本体スタイル */
.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 50%, #fad0c4 100%);
  padding: 40px;
  border-radius: 20px;
  z-index: 1001;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s ease;
  max-width: 500px;
  width: 90%;
  box-shadow:
    0 20px 40px rgba(255, 154, 158, 0.3),
    0 0 0 1px rgba(255, 255, 255, 0.2);
}

.modal.appear {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.modal p {
  color: #fff;
  line-height: 1.7;
  margin-bottom: 30px;
  font-size: 16px;
  text-align: center;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* 閉じるボタンスタイル */
.close-btn {
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 25px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: block;
  margin: 0 auto;
  backdrop-filter: blur(10px);
}

.close-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

/* JSで追加されるパーティクル用スタイル */
.particles-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  border-radius: 20px;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 50%;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); opacity: 0.6; }
  50% { transform: translateY(-20px) rotate(180deg); opacity: 1; }
}

(function () {
  var btn = document.querySelector('.modal-button');
  var mask = document.querySelector('.mask');
  var modal = document.querySelector('.modal');
  var closeBtns = document.querySelectorAll('.close-btn');

  if (!btn || !mask || !modal) return;

  function addParticles() {
    var container = document.createElement('div');
    container.className = 'particles-container';
    for (var p = 0; p < 20; p++) {
      var dot = document.createElement('div');
      dot.className = 'particle';
      dot.style.animation = 'float 3s ease-in-out infinite';
      dot.style.animationDelay = (Math.random() * 3) + 's';
      dot.style.left = Math.random() * 100 + '%';
      dot.style.top = Math.random() * 100 + '%';
      container.appendChild(dot);
    }
    modal.appendChild(container);
  }

  function removeParticles() {
    var pc = modal.querySelector('.particles-container');
    if (pc) pc.remove();
  }

  function openModal() {
    mask.classList.add('appear');
    modal.classList.add('appear');
    addParticles();
  }

  function closeModal() {
    mask.classList.remove('appear');
    modal.classList.remove('appear');
    removeParticles();
  }

  btn.addEventListener('click', openModal);
  mask.addEventListener('click', closeModal);
  closeBtns.forEach(function(b) { b.addEventListener('click', closeModal); });

  document.addEventListener('keydown', function (e) {
    if (e.key === 'Escape' && modal.classList.contains('appear')) {
      closeModal();
    }
  });
})();