Accordion / 009 — レトロゲーム

デザイン見本

Classic CRT monitor style
Green neon glow effects
Retro gaming atmosphere

懐かしいCRTモニター風のレトロゲームデザイン。スキャンラインアニメーションやモノスペースフォント、強烈なネオングリーンが特徴です。

実装コード

HTML

<div class="container">
    <div class="btn-box">
        <button data-default-text="Retro Gaming Accordion" data-open-text="Close">Retro Gaming Accordion</button>
    </div>
    <div class="more">
        <ul>
            <li>Classic CRT monitor style</li>
            <li>Green neon glow effects</li>
            <li>Retro gaming atmosphere</li>
        </ul>
    </div>
</div>

CSS

/* アニメーション定義 */
@keyframes acc9-retroFadeIn {
    0% {
        opacity: 0;
        transform: translateY(-10px)
    }
    100% {
        opacity: 1;
        transform: none
    }
}

@keyframes acc9-scanLine {
    0% {
        transform: translateX(-100%)
    }
    100% {
        transform: translateX(100%)
    }
}

.container {
    width: 100%;
    background: #0a0a0a;
    padding: 12px;
    border-radius: 8px;
}

.container .btn-box button {
    width: 100%;
    padding: 14px 20px;
    background: #000;
    border: 2px solid #00ff00;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
    color: #00ff00;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    position: relative;
    font-family: 'Courier New', monospace;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-shadow: 0 0 5px rgba(0, 255, 0, 0.8);
    overflow: hidden;
}

.container .btn-box button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, #00ff00, transparent);
    animation: acc9-scanLine 2s linear infinite;
}

.container .btn-box button::after {
    content: '▼';
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: #00ff00;
    transition: transform 0.3s ease;
}

.container .btn-box button:hover {
    background: rgba(0, 255, 0, 0.1);
}

.container .more {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
    background: #000;
    border: 2px solid #00ff00;
    border-top: none;
    border-radius: 0 0 8px 8px;
}

.container .more.appear {
    max-height: 200px;
    animation: acc9-retroFadeIn 0.4s ease;
}

.container:has(.more.appear) .btn-box button::after {
    transform: translateY(-50%) rotate(180deg);
}

.container .more ul {
    list-style: none;
    padding: 12px 16px;
    margin: 0;
}

.container .more li {
    padding: 8px 0;
    color: #00ff00;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    border-bottom: 1px solid rgba(0, 255, 0, 0.2);
    text-shadow: 0 0 3px rgba(0, 255, 0, 0.5);
}

.container .more li::before {
    content: '>';
    margin-right: 8px;
}

.container .more li:last-child {
    border-bottom: none;
}

document.addEventListener("DOMContentLoaded", () => {
    document.querySelectorAll('.container').forEach(container => {
        const button = container.querySelector('.btn-box button');
        const content = container.querySelector('.more');
        
        if (button && content) {
            button.addEventListener('click', function() {
                content.classList.toggle('appear');
                
                // ボタンテキストの切り替え
                if (content.classList.contains('appear')) {
                    this.textContent = this.dataset.openText || 'Close';
                } else {
                    this.textContent = this.dataset.defaultText;
                }
            });
        }
    });
});