/* ===== LAYOUT CHA ===== */
.tongkhungchia_detail {
    display: grid;
    grid-template-columns: 230px 1fr 255px;
    gap: 15px;
    align-items: start;
}

/* ===== TOC BOX ===== */
.khungthutusapxep {
/*    position: relative;*/
height: 100%;
}

/* Mặc định ẨN nút close */
.toc-close {
    display: none;
}

/* Khi TOC đang mở thì hiện */
.toc-fixed.is-open .toc-close {
    display: inline-block;
}
.toc-close {
    display: none;
    cursor: pointer;
}

/* chỉ hiện khi TOC mở thủ công */
.toc-fixed.show-close .toc-close {
    display: inline;
}


.toc-fixed {
    position: sticky;
    top: 10px; /* dưới banner */
    background: #f4f4f4;
    border-radius: 14px;
    box-shadow: 0 10px 30px rgba(0,0,0,.12);
    transition: .35s ease;
    z-index: 5;
    font-family: 'Nunito Sans',sans-serif;
}

/* HEADER */
.toc-header {
    padding: 14px 16px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #dfdfdf;
}

/* LIST */
.toc-list {
/*    max-height: calc(100vh - 220px);*/
    overflow-y: auto;
    list-style: none;
    padding-left:0;
}

.toc-list li {
    padding:5px 10px;
    border-bottom: 1px solid #ebebeb;
    font-size: 14px;
}

.toc-list li a {
    color: #333333;
}

.toc-list li.active {
    background: #13c3aa;
    color: #fff;
}

/* ===== TRẠNG THÁI ẨN (HÌNH 2) ===== */
.toc-fixed.minimize {
    opacity: 0;
    transform: translateX(-20px);
    pointer-events: none;
}

/* ===== ICON BOOKMARK ===== */
.toc-toggle-icon {
    position: fixed;
    left: 20px;
    bottom: 35%;
    width: 46px;
    height: 46px;
    background: #db5f24;
    color: #fff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;

    opacity: 0;
    pointer-events: none;
    transition: .3s;
    z-index: 999;
}

.toc-toggle-icon.show {
    opacity: 1;
    pointer-events: auto;
        line-height: 46px;
    text-align: center;
}


.toc-list a {
    display: flex;
    gap: 8px;
    align-items: flex-start;
}

.toc-num {
    font-weight: 500;
    color: #db5f24;
    min-width: auto;
}

.lv-h3 {
    padding-left: 16px;
}

.toc-list li.active > a {
    color: #035fa8;
    font-weight: 600;
}

.toc-list li.active {
    background: rgba(19,195,170,.1);
    border-radius: 6px;
}
.toc-list a.active {
    color: #035fa8;
    font-weight: 600;
}

.toc-list a.active .toc-num {
    background: #035fa8;
    color: #fff;
    border-radius: 4px;
    padding: 2px 6px;
}


/* ===== MOBILE ===== */
@media (max-width: 991px) {

    .tongkhungchia_detail {
        grid-template-columns: 1fr;
    }

    .toc-fixed {
        position: fixed;
        left: -280px;
        top: 0;
        height: 100%;
        width: 260px;
        z-index: 1001;
    }

    .toc-fixed.open {
        left: 0;
    }

    .toc-toggle-icon {
        bottom: 20px;
        right: 20px;
    }
}