Accordion / 018 — ネイチャー

デザイン見本

Natural wood grain texture
Organic color palette
Warm and charming design

自然を感じさせる温かみのあるデザイン。木目調のカラーパレットと葉をイメージしたアクセントラインが、オーガニックな雰囲気を演出します。他デザイン同様、排他制御機能付きです。

実装コード

HTML

<div class="container">
    <div class="btn-box">
        <button data-default-text="Nature Accordion" data-open-text="Close">Nature Accordion</button>
    </div>
    <div class="more">
        <ul>
            <li>Natural wood grain texture</li>
            <li>Organic color palette</li>
            <li>Warm and charming design</li>
        </ul>
    </div>
</div>

CSS

/* アニメーション定義 */
@keyframes acc18-natureFadeIn {
    0% {
        opacity: 0;
        transform: translateY(-10px) scale(0.98)
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1)
    }
}

@keyframes acc18-leafShift {
    0% {
        background-position: 0% 50%
    }
    50% {
        background-position: 100% 50%
    }
    100% {
        background-position: 0% 50%
    }
}

.container {
    margin: 4px 0;
    position: relative;
    width: 100%;
}

.container .btn-box button {
    width: 100%;
    padding: 16px 20px;
    background: linear-gradient(135deg, #8B4513, #A0522D, #CD853F);
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.container .btn-box button:hover {
    background: linear-gradient(135deg, #A0522D, #CD853F, #DEB887);
    transform: translateY(-2px);
}

.container .more {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
    background: linear-gradient(135deg, #F5DEB3, #F4A460, #DEB887);
    border-radius: 0 0 12px 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    z-index: 1;
    position: relative;
}

.container .more::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #228B22, #32CD32, #90EE90, #228B22);
    background-size: 200% 100%;
    animation: acc18-leafShift 3s ease infinite;
}

.container .more.appear {
    max-height: 200px;
    margin-top: -5px;
    animation: acc18-natureFadeIn 0.4s ease;
}

.container .more ul {
    list-style: none;
    padding: 18px 22px;
    margin: 0;
}

.container .more li {
    padding: 10px 0;
    color: #654321;
    font-weight: 500;
    border-bottom: 1px solid rgba(101, 67, 33, 0.2);
    font-size: 13px;
}

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

document.addEventListener("DOMContentLoaded", () => {
    const containers = document.querySelectorAll('.container');
    
    containers.forEach(container => {
        const button = container.querySelector('.btn-box button');
        const content = container.querySelector('.more');
        
        if (button && content) {
            button.addEventListener('click', function() {
                const isOpen = content.classList.contains('appear');
                
                // 他のアコーディオンを閉じる
                containers.forEach(c => {
                    const cContent = c.querySelector('.more');
                    const cButton = c.querySelector('.btn-box button');
                    if(cContent) cContent.classList.remove('appear');
                    if(cButton) cButton.textContent = cButton.dataset.defaultText;
                });
                
                // クリックされたものだけ開く
                if (!isOpen) {
                    content.classList.add('appear');
                    this.textContent = this.dataset.openText || 'Close';
                }
            });
        }
    });
});