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Modal / 21 テックサーキット｜Tech Circuit

デザイン見本

黒（#0a0a0a）とネオングリーン（#00ff41）のコントラスト、光を放つような`box-shadow`や`text-shadow`、そして`repeating-linear-gradient`で作られた電子基板のようなグリッドラインが特徴的な、ハッカー・サイバーパンク風のデザインです。ボタンホバー時には光が走るエフェクトが付いています。

実装コード

HTML 
<!-- モーダルを開くボタン -->
<button class="modal-button">Tech Circuit 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>【Tech Circuit Modal】</p>
    <p>回路基板パターンのハイテクなモーダルウィンドウです。</p>
    <div class="close-btn-container">
      <button class="close-btn">Close</button>
    </div>
  </div>
</div>
CSS 
/* 開くボタンのスタイル */
.modal-button {
  padding: 15px 30px;
  background: #1a1a1a;
  color: #00ff41;
  border: 2px solid #00ff41;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-shadow: 0 0 10px #00ff41;
  box-shadow: 0 0 20px rgba(0, 255, 65, 0.3);
  position: relative;
  overflow: hidden;
}

/* ホバー時に白い光が走るエフェクト */
.modal-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 65, 0.2), transparent);
  transition: left 0.5s;
}

.modal-button:hover::before {
  left: 100%;
}

.modal-button:hover {
  background: #00ff41;
  color: #1a1a1a;
  text-shadow: none;
  box-shadow: 0 0 30px rgba(0, 255, 65, 0.6);
  transform: scale(1.05);
}

/* 回路の光る点 */
.circuit-points {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  border-radius: 12px;
}

.circuit-point {
  position: absolute;
  width: 6px;
  height: 6px;
  background: #00ff41;
  border-radius: 50%;
  box-shadow: 0 0 10px #00ff41;
  animation: circuitPulse 2s ease-in-out infinite;
}

@keyframes circuitPulse {
  0%, 100% { opacity: 0.3; transform: scale(1); box-shadow: 0 0 10px #00ff41; }
  50% { opacity: 1; transform: scale(1.5); box-shadow: 0 0 20px #00ff41, 0 0 30px #00ff41; }
}

/* 背景マスクのスタイル */
.mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.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: #0a0a0a;
  padding: 40px;
  border-radius: 12px;
  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%;
  border: 2px solid #00ff41;
  box-shadow: 0 0 30px rgba(0, 255, 65, 0.4);
  overflow: hidden;
}

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

/* 回路基板パターンの背景 */
.modal::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    linear-gradient(90deg, transparent 0%, rgba(0, 255, 65, 0.1) 50%, transparent 100%),
    linear-gradient(0deg, transparent 0%, rgba(0, 255, 65, 0.1) 50%, transparent 100%),
    repeating-linear-gradient(90deg, transparent, transparent 20px, rgba(0, 255, 65, 0.05) 20px, rgba(0, 255, 65, 0.05) 22px),
    repeating-linear-gradient(0deg, transparent, transparent 20px, rgba(0, 255, 65, 0.05) 20px, rgba(0, 255, 65, 0.05) 22px);
  pointer-events: none;
}

/* 内側のサブボーダー */
.modal::after {
  content: '';
  position: absolute;
  top: 10px;
  left: 10px;
  right: 10px;
  bottom: 10px;
  border: 1px solid rgba(0, 255, 65, 0.3);
  border-radius: 8px;
  pointer-events: none;
}

.modal p {
  color: #00ff41;
  line-height: 1.7;
  margin-bottom: 30px;
  font-size: 16px;
  text-shadow: 0 0 8px #00ff41;
  text-align: center;
  position: relative;
  z-index: 2;
}

/* 閉じるボタンのスタイル */
.close-btn {
  padding: 12px 24px;
  background: transparent;
  color: #00ff41;
  border: 2px solid #00ff41;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-shadow: 0 0 8px #00ff41;
  box-shadow: 0 0 15px rgba(0, 255, 65, 0.3);
  display: block;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.close-btn:hover {
  background: #00ff41;
  color: #1a1a1a;
  text-shadow: none;
  box-shadow: 0 0 25px rgba(0, 255, 65, 0.6);
  transform: scale(1.05);
}
JS 
(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');
  }

  // ホバーエフェクト
  modal.addEventListener('mouseenter', function () {
    this.style.boxShadow = '0 0 40px rgba(0, 255, 65, 0.6)';
  });
  modal.addEventListener('mouseleave', function () {
    this.style.boxShadow = '0 0 30px rgba(0, 255, 65, 0.4)';
  });

  // 回路ポイント生成
  function buildCircuitPoints(modal) {
    if (modal.querySelector('.circuit-points')) return; // 既に生成済みならスキップ

    var wrap = document.createElement('div');
    wrap.className = 'circuit-points';

    var coords = [
      { top: '10%', left: '10%' },
      { top: '10%', right: '10%' },
      { bottom: '10%', left: '10%' },
      { bottom: '10%', right: '10%' },
      { top: '50%', left: '5%' },
      { top: '50%', right: '5%' },
      { top: '25%', left: '20%' },
      { top: '25%', right: '20%' },
      { bottom: '25%', left: '20%' },
      { bottom: '25%', right: '20%' }
    ];

    for (var c = 0; c < coords.length; c++) {
      var pt = document.createElement('div');
      pt.className = 'circuit-point';
      // アニメーション遅延をランダムに
      pt.style.animationDelay = (c * 0.2) + 's';
      
      var pos = coords[c];
      var keys = Object.keys(pos);
      for (var ki = 0; ki < keys.length; ki++) {
        pt.style[keys[ki]] = pos[keys[ki]];
      }
      wrap.appendChild(pt);
    }
    modal.appendChild(wrap);
  }

  // 初期化時にポイント生成
  buildCircuitPoints(modal);

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