タブメニュー：フューチャリスティック（近未来風）｜Tab Menu: Futuristic Tech

<div id="tab-design-collection">
    <!-- Design 25 -->
    <section class="design-section">
        <div class="tab-container tab-design-25">
            <ul>
                <li class="selected" data-id="tab-25-1">SYSTEM</li>
                <li data-id="tab-25-2">STATUS</li>
                <li data-id="tab-25-3">LOGS</li>
            </ul>

            <div class="tab-content selected" id="tab-25-1">
                <div class="content-title">System Overview</div>
                <p>Core systems are online. Architecture optimized for WordPress integration.</p>
            </div>
            <div class="tab-content" id="tab-25-2">
                <div class="content-title">Current Status</div>
                <p>All modules functioning within normal parameters. WAF evasion protocols active.</p>
            </div>
            <div class="tab-content" id="tab-25-3">
                <div class="content-title">Access Logs</div>
                <p>User access confirmed. Security clearance granted.</p>
            </div>
        </div>
    </section>
</div>

#tab-design-collection .tab-design-25 .tab-container {
    position: relative;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 6px;
    overflow: hidden;
    font-family: 'Courier New', Courier, monospace;
}

#tab-design-collection .tab-design-25 ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    background: #161b22;
    border-bottom: 1px solid #30363d;
}

#tab-design-collection .tab-design-25 ul li {
    flex: 1;
    padding: 15px 10px;
    text-align: center;
    cursor: pointer;
    color: #8b949e;
    position: relative;
    transition: all 0.3s;
    border-right: 1px solid #30363d;
    font-size: 14px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

#tab-design-collection .tab-design-25 ul li:last-child {
    border-right: none;
}

#tab-design-collection .tab-design-25 ul li:not(.selected):hover {
    color: #58a6ff;
    background: rgba(88, 166, 255, 0.1);
}

#tab-design-collection .tab-design-25 ul li.selected {
    color: #fff;
    background: #0d1117;
    font-weight: bold;
}

#tab-design-collection .tab-design-25 ul li.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: #58a6ff;
    box-shadow: 0 0 8px #58a6ff;
}

#tab-design-collection .tab-design-25 ul li.selected::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid #58a6ff;
    opacity: 0.8;
}

#tab-design-collection .tab-design-25 .tab-content {
    display: none;
    padding: 30px;
    border-top: 1px solid #30363d;
    min-height: 200px;
    background:
        linear-gradient(rgba(13, 17, 23, 0.9), rgba(13, 17, 23, 0.9)),
        repeating-linear-gradient(0deg, transparent, transparent 1px, #1f2937 1px, #1f2937 2px);
    background-size: 100% 4px;
}

#tab-design-collection .tab-design-25 .tab-content.selected {
    display: block;
    animation: techFadeIn 0.4s ease-out;
}

#tab-design-collection .tab-design-25 .content-title {
    color: #58a6ff;
    border-left: 4px solid #58a6ff;
    padding-left: 10px;
    margin-top: 0;
    text-transform: uppercase;
    font-size: 1.17em;
    font-weight: bold;
    margin-bottom: 1em;
}

#tab-design-collection .tab-design-25 p {
    line-height: 1.6;
    color: #c9d1d9;
}

@keyframes techFadeIn {
    0% {
        opacity: 0;
        transform: translateY(5px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

(function () {
    'use strict';

    const root = document.getElementById('tab-design-collection');
    if (!root) return;

    // タブコンテナの取得 (スコープ内)
    const container = root.querySelector('.tab-design-25');
    if (!container) return;

    const tabItems = container.querySelectorAll('ul li');
    const contents = container.querySelectorAll('.tab-content');

    for (let i = 0; i < tabItems.length; i++) {
        tabItems[i].addEventListener('click', function () {
            for (let j = 0; j < tabItems.length; j++) {
                tabItems[j].classList.remove('selected');
            }
            for (let k = 0; k < contents.length; k++) {
                contents[k].classList.remove('selected');
            }

            this.classList.add('selected');

            const targetId = this.getAttribute('data-id');
            const targetContent = document.getElementById(targetId);

            if (targetContent) {
                targetContent.classList.add('selected');
            }
        });
    }
})();