/* ===== base ===== */
.tm-root * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.tm-root {
    background-color: #1a1a1a;
    font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
    color: #ffffff;
    padding: 40px 20px 5%;
    position: relative;
}

/* ===== sidebar (no bloquea clics) ===== */
.sidebar {
    position: fixed;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 180px;
    pointer-events: none;
    z-index: 0;
}

.sidebar-item {
    color: #666;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    line-height: 1.2;
    max-width: 150px;
    pointer-events: auto;
}

.sidebar-number {
    color: #888;
    font-size: 12px;
    margin-bottom: 5px;
}

.sidebar-item.active {
    color: #fff;
    border-left: 2px solid #4CAF50;
    padding-left: 10px;
}

/* ===== derecha ===== */
.menu-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.menu-block {
    border-bottom: 1px solid #333;
}

/* header */
.menu-item {
    width: 100%;
    display: flex;
    align-items: center;
    padding: 20px 0;
    background: transparent;
    border: 0;
    cursor: pointer;
    transition: all .2s ease;
    text-align: left;
    color: inherit;
}

    .menu-item:hover {
        background-color: #2a2a2a;
        margin: 0 -20px;
        padding-left: 20px;
        padding-right: 20px;
    }

.item-number {
    color: #666;
    font-size: 24px;
    font-weight: 300;
    min-width: 80px;
    margin-right: 20px;
}

.item-title {
    flex: 1;
    font-size: 20px;
    font-weight: 400;
    line-height: 1.4;
}

.item-arrow {
    color: #666;
    font-size: 20px;
    transition: transform .2s ease;
}

.menu-item:hover .item-arrow {
    transform: translateX(5px);
}

.menu-block.is-open .item-arrow {
    transform: rotate(180deg);
}

/* panel (animación) */
.item-panel {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows .25s ease, opacity .25s ease;
    opacity: .0;
}

.item-panel__inner {
    overflow: hidden;
    padding: 0 0 16px 100px;
    color: #cbd5e1;
}

.menu-block.is-open .item-panel {
    grid-template-rows: 1fr;
    opacity: 1;
}

/* lista interna */
.tm-ul {
    margin-top: 10px;
    padding-left: 18px;
    display: flex;
    flex-direction: column;
    gap: .35rem;
}

    .tm-ul li {
        list-style: disc;
        color: #cbd5e1;
    }

/* responsive */
@media (max-width:768px) {
    .sidebar {
        display: none;
    }

    .item-panel__inner {
        padding-left: 80px;
    }
}