Függőleges neon menü

<nav class="menu-vertical">
    <a href="#" class="active">
        <span class="menu-icon">01</span>
        <span>Kezdőlap</span>
    </a>

    <a href="#">
        <span class="menu-icon">02</span>
        <span>Rólunk</span>
    </a>

    <a href="#">
        <span class="menu-icon">03</span>
        <span>Szolgáltatások</span>
    </a>

    <a href="#">
        <span class="menu-icon">04</span>
        <span>Portfólió</span>
    </a>

    <a href="#">
        <span class="menu-icon">05</span>
        <span>Kapcsolat</span>
    </a>
</nav>

.menu-vertical {
    display: flex;
    flex-direction: column;
    width: 240px;
    padding: 10px;
    gap: 4px;
    background: #080b11;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
}

.menu-vertical a {
    position: relative;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 16px;
    color: #7f8b9c;
    text-decoration: none;
    font-size: 13px;
    letter-spacing: 0.05em;
    border-radius: 9px;
    overflow: hidden;
    transition:
        color 0.3s ease,
        background 0.3s ease,
        padding-left 0.3s ease;
}

.menu-vertical a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 2px;
    height: 100%;
    background: #2ecc71;
    transform: scaleY(0);
    transform-origin: center;
    transition: transform 0.3s ease;
}

.menu-vertical a:hover {
    color: #ffffff;
    background: rgba(46, 204, 113, 0.05);
    padding-left: 20px;
}

.menu-vertical a.active {
    color: #ffffff;
    background: rgba(46, 204, 113, 0.08);
}

.menu-vertical a.active::before {
    transform: scaleY(1);
    box-shadow: 0 0 10px rgba(46, 204, 113, 0.7);
}

.menu-icon {
    min-width: 22px;
    color: #3f4b5a;
    font-family: monospace;
    font-size: 10px;
    transition: color 0.3s ease;
}

.menu-vertical a:hover .menu-icon,
.menu-vertical a.active .menu-icon {
    color: #2ecc71;
}

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