Modal / 16 ネイチャー｜Nature Inspired

デザイン見本

緑と淡いグリーンを基調とし、ゆったりと浮遊する放射状のグラデーション(`radial-gradient`と`@keyframes`)を配置。葉を通した木漏れ日のような柔らかい自然の印象を与えます。

実装コード

HTML

<!-- モーダルを開くボタン -->
<button class="modal-button">Nature Inspired 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>【Nature Inspired Modal】</p>
    <p>自然をモチーフにしたグリーンのモーダルウィンドウです。</p>
    <button class="close-btn">Close</button>
  </div>
</div>

CSS

/* 開くボタンのスタイル */
.modal-button {
  padding: 15px 30px;
  background: linear-gradient(135deg, #8BC34A 0%, #4CAF50 50%, #2E7D32 100%);
  color: #fff;
  border: none;
  border-radius: 25px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(139, 195, 74, 0.3);
  position: relative;
  overflow: hidden;
}

.modal-button:hover {
  background: linear-gradient(135deg, #4CAF50 0%, #2E7D32 50%, #8BC34A 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 195, 74, 0.4);
}

/* 背景マスクのスタイル */
.mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(139, 195, 74, 0.3);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  backdrop-filter: blur(5px);
}

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

/* モーダル本体のスタイル */
.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  background: linear-gradient(135deg, #F1F8E9 0%, #DCEDC8 50%, #C8E6C9 100%);
  padding: 40px;
  border-radius: 16px;
  z-index: 1001;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
  max-width: 500px;
  width: 90%;
  box-shadow: 0 10px 30px rgba(139, 195, 74, 0.2);
  border: 2px solid #8BC34A;
  overflow: hidden;
}

.modal::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(139, 195, 74, 0.1) 0%, transparent 70%);
  animation: natureFloat 6s ease-in-out infinite;
}

@keyframes natureFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(10px, -10px) rotate(120deg); }
  66% { transform: translate(-5px, 5px) rotate(240deg); }
}

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

.modal p {
  color: #2E7D32;
  font-weight: 600;
  text-align: center;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

/* 右上配置の閉じるボタンスタイル */
.close-btn {
  position: absolute;
  top: 15px;
  right: 15px;
  width: 32px;
  height: 32px;
  background: rgba(139, 195, 74, 0.9);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  line-height: 1;
}

.close-btn:hover {
  background: rgba(76, 175, 80, 0.9);
  transform: scale(1.1);
  box-shadow: 0 2px 8px rgba(139, 195, 74, 0.4);
}

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

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

  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();
    }
  });
})();