/* =========================================
   MODULE: TEXT REGION TOC (NÚT TRÊN - GÓC TRÁI)
   ========================================= */

.thx-ec-sidebar-toggle-btn {
    position: fixed;
    left: 0;
    right: auto;

    /* Căn giữa màn hình (Nằm trên GSP) */
    top: 50% !important;
    bottom: auto !important;
    margin-top: -24px;

    transform: translateX(-100%);

    width: 42px !important;
    height: 42px !important;
    border-radius: 0 8px 8px 0 !important;

    background: #fff;
    color: #555;
    border: 1px solid #e0e0e0;
    border-left: none;

    box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 9991;

    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    cursor: pointer;

    opacity: 0;
    visibility: hidden;

    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1),
        opacity 0.3s ease, visibility 0.3s,
        width 0.2s ease, background 0.2s;
}

.thx-ec-sidebar-toggle-btn.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.thx-ec-sidebar-toggle-btn:hover {
    width: 52px !important;
    background: #f9f9f9;
    color: #0073aa;
    box-shadow: 4px 2px 12px rgba(0, 0, 0, 0.15);
}

.thx-ec-sidebar-toggle-btn svg {
    width: 22px;
    height: 22px;
    display: block;
    stroke-width: 2;
}

/* Ẩn khi Drawer mở */
body.showing-popup-drawer-from-right .thx-ec-sidebar-toggle-btn,
body.showing-popup-drawer-from-left .thx-ec-sidebar-toggle-btn,
body.kadence-drawer-open .thx-ec-sidebar-toggle-btn {
    opacity: 0 !important;
    visibility: hidden !important;
    transform: translateX(-100%) !important;
}

/* SIDEBAR PANEL */
.thx-ec-page-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;

    /* [CẬP NHẬT] Width rộng nhưng giới hạn Max Width cho Mobile */
    width: 350px;
    max-width: 85vw;
    /* Chỉ chiếm 85% chiều rộng màn hình để hở mép overlay */

    background: #fff;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
    z-index: 200002;
    transform: translateX(-100%);
    transition: transform 0.3s;
    display: flex;
    flex-direction: column;
    font-family: sans-serif;
}

.thx-ec-page-sidebar.is-open {
    transform: translateX(0);
}

.thx-ec-sidebar-header {
    padding: 0 20px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f8f9fa;
    height: 50px;
    flex-shrink: 0;
}

.thx-ec-sidebar-title {
    font-weight: 700;
    font-size: 15px;
    color: #333;
    text-transform: uppercase;
}

.thx-ec-sidebar-close {
    background: none;
    border: none;
    cursor: pointer;
    color: #999;
    padding: 4px;
    border-radius: 4px;
    display: flex;
}

.thx-ec-sidebar-close:hover {
    background: #eee;
    color: #d63638;
}

.thx-ec-sidebar-content {
    flex-grow: 1;
    overflow-y: auto;
    padding: 10px 0;
}

.thx-ec-page-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: background 0.1s;
    color: #444;
    font-size: 14px;
    border-bottom: 1px solid #f9f9f9;
}

.thx-ec-page-item:hover {
    background: #f0f7ff;
    color: #0073aa;
}

.thx-ec-page-item.is-current {
    background: #e6f2fa;
    color: #0073aa;
    border-left-color: #0073aa;
    font-weight: 600;
}

.thx-ec-page-num {
    width: 24px;
    height: 24px;
    background: #eee;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    margin-right: 12px;
    color: #666;
    font-weight: bold;
    flex-shrink: 0;
}

.thx-ec-page-item.is-current .thx-ec-page-num {
    background: #0073aa;
    color: #fff;
}

.thx-ec-page-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
}

.thx-ec-sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 200000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s;
    backdrop-filter: blur(2px);
}

.thx-ec-sidebar-overlay.is-visible {
    opacity: 1;
    visibility: visible;
}

/* Responsive for mobile */
@media (max-width: 768px) {
    .thx-ec-sidebar-toggle-btn {
        width: 32px !important;
        height: 44px !important;
        margin-top: -25px !important;
    }

    .thx-ec-sidebar-toggle-btn.is-visible {
        opacity: 0.5 !important;
    }

    .thx-ec-sidebar-toggle-btn:active {
        opacity: 1 !important;
    }

    .thx-ec-sidebar-toggle-btn svg {
        width: 18px !important;
        height: 18px !important;
    }
}