モーダルウィンドウ：テックサーキット｜Modal Window: Tech Circuit

<div class="container">
    <button class="modal-button">Tech Circuit Modal</button>
</div>

<div class="mask"></div>
<div class="modal">
    <div class="modal-content">
        <p>[Tech Circuit Modal]</p>
        <p>A high-tech modal window with circuit board patterns and digital effects. Features animated circuit lines and glowing connection points for a cyberpunk aesthetic.</p>
        <div class="close-btn-container">
            <button class="close-btn">Close</button>
        </div>
    </div>
</div>

.container {
    text-align: center;
}

.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;
    font-family: 'Courier New', monospace;
}

.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);
}

.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;
}

.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::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;
}

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

.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;
    font-family: 'Courier New', monospace;
}

.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;
    font-family: 'Courier New', monospace;
}

.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);
}

.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;
    }
}

@media (max-width: 768px) {
    .modal {
        width: 95%;
        padding: 20px;
    }
    
    .modal p {
        font-size: 14px;
    }
    
    .modal-button {
        font-size: 14px;
        padding: 10px 20px;
    }
}

document.addEventListener('DOMContentLoaded', function() {
    const modalBtn = document.querySelector('.modal-button');
    const mask = document.querySelector('.mask');
    const modal = document.querySelector('.modal');
    const closeBtn = modal.querySelector('.close-btn');
    
    // モーダルを開く
    modalBtn.addEventListener('click', () => {
        mask.classList.add('appear');
        modal.classList.add('appear');
        createCircuitPoints();
    });
    
    // マスクをクリックして閉じる
    mask.addEventListener('click', () => {
        closeModal();
    });
    
    // 閉じるボタンをクリックして閉じる
    closeBtn.addEventListener('click', () => {
        closeModal();
    });
    
    // ESCキーでモーダルを閉じる
    document.addEventListener('keydown', function(e) {
        if (e.key === 'Escape') {
            closeModal();
        }
    });
    
    // モーダルを閉じる関数
    function closeModal() {
        mask.classList.remove('appear');
        modal.classList.remove('appear');
        clearCircuitPoints();
    }
    
    // 回路接続点作成関数
    function createCircuitPoints() {
        const circuitContainer = document.createElement('div');
        circuitContainer.className = 'circuit-points';
        
        // 接続点を配置
        const positions = [
            { 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%' }
        ];
        
        positions.forEach((pos, index) => {
            const point = document.createElement('div');
            point.className = 'circuit-point';
            point.style.animationDelay = `${index * 0.2}s`;
            
            Object.keys(pos).forEach(key => {
                point.style[key] = pos[key];
            });
            
            circuitContainer.appendChild(point);
        });
        
        modal.appendChild(circuitContainer);
    }
    
    // 回路接続点クリア関数
    function clearCircuitPoints() {
        const circuitContainer = modal.querySelector('.circuit-points');
        if (circuitContainer) {
            circuitContainer.remove();
        }
    }
    
    // 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)';
    });
});