/* ============================================================
   SENTINEL — Warm Charcoal Theme (Poppins)
   Neutral dark with warm undertones — graphite/charcoal palette
   ============================================================ */

:root {
    --s-bg:         #121216;
    --s-bg-alt:     #19191f;
    --s-surface:    #1f1f27;
    --s-surface-alt:#272730;
    --s-border:     #33333e;
    --s-border-alt: #40404d;
    --s-accent:     #7c6ef6;
    --s-accent-light: rgba(124, 110, 246, 0.12);
    --s-danger:     #ef4444;
    --s-success:    #22c55e;
    --s-warning:    #eab308;
    --s-text:       #e8e8ed;
    --s-muted:      #8c8c99;
    --s-nav-muted:  #a8a8b4;
}

* { box-sizing: border-box; }

html, body {
    margin: 0; padding: 0;
    width: 100%; height: 100%;
    overflow: hidden;
    font-family: 'Poppins', sans-serif;
    font-size: 14px;
    color: var(--s-text);
    background: var(--s-bg);
}

/* ---- Top Menu Bar ------------------------------------------------ */

.system-menu {
    height: 45px;
    background-color: var(--s-surface);
    box-shadow: 0 1px 0 var(--s-border);
    /* Always above any window — windows climb in z-index as they're focused,
       so the menu must sit above whatever they can possibly reach. */
    z-index: 2000000000;
    position: relative;
    font-weight: 500;
}
.navbar-brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--s-text) !important;
}
.system-menu .nav-link {
    color: var(--s-nav-muted) !important;
    padding: 0 15px;
    line-height: 45px;
    height: 45px;
    transition: color 0.2s;
    font-size: 14px;
}
.system-menu .nav-link:hover {
    color: var(--s-accent) !important;
}
.system-menu .dropdown-menu {
    border: 1px solid var(--s-border);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    border-radius: 8px;
    padding: 6px 0;
    background: var(--s-surface);
    z-index: 2000000001;
}
.system-menu .dropdown-item {
    padding: 8px 16px;
    font-size: 14px;
    color: var(--s-text);
    transition: background 0.15s;
}
.system-menu .dropdown-item:hover {
    background: var(--s-surface-alt);
    color: var(--s-accent);
}
.system-menu .dropdown-item i {
    width: 20px;
    text-align: center;
}

/* ---- Desktop ----------------------------------------------------- */

#desktop {
    height: calc(100% - 45px);
    position: relative;
    width: 100%;
}

/* ---- Window ------------------------------------------------------ */

.os-window {
    position: absolute;
    background: var(--s-surface);
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    min-width: 350px;
    min-height: 250px;
    overflow: hidden;
    border: 1px solid var(--s-border);
    transition: box-shadow 0.2s ease;
}
.os-window.active-window {
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.5);
    border-color: var(--s-border-alt);
}

.os-window-header {
    background: var(--s-surface);
    padding: 10px 18px;
    cursor: move;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--s-border);
    user-select: none;
    transition: background 0.2s ease;
}
.os-window.active-window .os-window-header {
    background: var(--s-surface-alt);
    border-bottom-color: var(--s-border-alt);
}

/* Stale window indicator — data changed by another admin */
.os-window-stale {
    display: none; align-items: center; gap: 6px;
    font-size: 0.75rem; color: var(--s-warning);
    padding: 5px 18px; background: rgba(234,179,8,0.08);
    border-bottom: 1px solid var(--s-border); cursor: pointer;
}
.os-window-stale:hover { background: rgba(234,179,8,0.14); }
.os-window.stale .os-window-stale { display: flex; }

.os-window-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--s-text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.os-window-controls {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin-right: -18px;
    align-self: stretch;
    margin-top: -10px;
    margin-bottom: -10px;
}
.os-window-controls i {
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--s-muted);
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 100%;
}
.btn-minimize-win:hover { background: rgba(255,255,255,0.08); color: var(--s-text); }
.btn-maximize-win:hover { background: rgba(255,255,255,0.08); color: var(--s-text); }
.btn-close-win:hover    { background: #e81123; color: #fff; }

.os-window-content {
    padding: 15px;
    flex-grow: 1;
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--s-surface);
}

.os-window.maximized {
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    border-radius: 0;
}
.os-window.minimized {
    display: none;
}

/* ---- Context Menu ------------------------------------------------ */

#custom-context-menu {
    position: absolute;
    background: var(--s-surface);
    border-radius: 6px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    padding: 6px 0;
    min-width: 180px;
    z-index: 10000;
    display: none;
    border: 1px solid var(--s-border-alt);
}
.context-menu-item {
    padding: 8px 20px;
    font-size: 0.85rem;
    color: var(--s-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: background 0.2s;
}
.context-menu-item i {
    margin-right: 10px;
    color: var(--s-muted);
    width: 16px;
    text-align: center;
}
.context-menu-item:hover {
    background: var(--s-surface-alt);
    color: var(--s-accent);
}
.context-menu-item:hover i {
    color: var(--s-accent);
}
.context-menu-divider {
    height: 1px;
    background: var(--s-border);
    margin: 4px 0;
}

/* ---- Login Overlay ----------------------------------------------- */

#login-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--s-bg);
    z-index: 50000;
}
.login-box {
    background: var(--s-surface);
    border: 1px solid var(--s-border);
    border-radius: 16px;
    padding: 48px 56px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}
.login-icon {
    display: block;
    margin: 0 auto 12px;
}
.login-box h2 {
    color: var(--s-text);
    font-weight: 700;
    margin-bottom: 4px;
}
.btn-discord {
    background: #5865F2;
    color: #fff;
    border: none;
    padding: 12px 32px;
    margin-top: 20px;
    border-radius: 8px;
    font-weight: 600;
}
.btn-discord:hover {
    background: #4752C4;
    color: #fff;
}

/* ---- Component Styles -------------------------------------------- */

h1, h2, h3, h4, h5, h6 { color: var(--s-text); font-weight: 600; }
p, span, div, td, th, li, label { color: inherit; }
.text-muted { color: var(--s-muted) !important; }
.text-dark { color: var(--s-text) !important; }
a { color: var(--s-accent); }
a:hover { color: #9a8ffa; }
hr { border-color: var(--s-border); opacity: 0.5; }

.card-light {
    background: var(--s-surface);
    border: 1px solid var(--s-border);
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}
.card-light-header {
    border-bottom: 1px solid var(--s-border);
    padding: 12px 15px;
    font-weight: 600;
    background: var(--s-surface-alt);
    border-radius: 8px 8px 0 0;
    color: var(--s-text);
}

/* ---- Bootstrap Dark Overrides ----------------------------------- */

/* Tables */
.table, .table-hover, .table-sm, .table-striped {
    --bs-table-bg: transparent;
    --bs-table-color: var(--s-text);
    --bs-table-border-color: var(--s-border);
    --bs-table-striped-bg: rgba(255,255,255,0.02);
    --bs-table-hover-bg: rgba(124,110,246,0.06);
    color: var(--s-text);
}
.table th {
    color: var(--s-muted);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--s-border) !important;
    background: transparent;
}
.table td {
    border-bottom: 1px solid var(--s-border) !important;
    vertical-align: middle;
    color: var(--s-text);
    background: transparent;
}
.table > :not(caption) > * > * {
    background-color: transparent !important;
    color: var(--s-text);
    border-bottom-color: var(--s-border) !important;
}
.table-hover > tbody > tr:hover > * {
    background-color: rgba(124,110,246,0.06) !important;
    color: var(--s-text) !important;
}
.table-responsive { background: transparent; }

/* Forms */
.form-control, .form-select, input[type="text"], input[type="number"],
input[type="password"], input[type="email"], input[type="search"],
input[type="date"], input[type="time"], input[type="datetime-local"],
textarea, select {
    background-color: var(--s-bg-alt) !important;
    border-color: var(--s-border) !important;
    color: var(--s-text) !important;
}
.form-control:focus, .form-select:focus,
input:focus, textarea:focus, select:focus {
    border-color: var(--s-accent) !important;
    box-shadow: 0 0 0 2px var(--s-accent-light) !important;
    background-color: var(--s-bg-alt) !important;
    color: var(--s-text) !important;
}
.form-control::placeholder, input::placeholder, textarea::placeholder {
    color: var(--s-muted) !important;
}
.form-control:disabled, .form-control[readonly],
input:disabled, input[readonly] {
    background-color: var(--s-surface) !important;
    color: var(--s-muted) !important;
    opacity: 0.7;
}
.form-label, label { color: var(--s-text); }
.form-text { color: var(--s-muted) !important; }
.form-check-input {
    background-color: var(--s-bg-alt) !important;
    border-color: var(--s-border) !important;
}
.form-check-input:checked {
    background-color: var(--s-accent) !important;
    border-color: var(--s-accent) !important;
}
.form-switch .form-check-input {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%238c8c99'/%3e%3c/svg%3e") !important;
}
.form-switch .form-check-input:checked {
    background-color: var(--s-success) !important;
    border-color: var(--s-success) !important;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23fff'/%3e%3c/svg%3e") !important;
}

/* ---- Unified Toggle Switch (s-switch) ------------------------------ */
.s-toggle {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 14px; margin-bottom: 6px;
    background: var(--s-surface); border: 1px solid var(--s-border);
    border-radius: 8px; cursor: pointer; transition: border-color 0.15s;
}
.s-toggle:hover { border-color: var(--s-border-alt); }
.s-toggle-label { flex: 1; font-size: 13px; font-weight: 500; color: var(--s-text); }
.s-toggle-key {
    font-family: 'Courier New', monospace; font-size: 12px;
    color: var(--s-muted); margin-left: 4px;
}
.s-switch {
    position: relative; width: 38px; height: 22px; flex-shrink: 0;
}
.s-switch input { opacity: 0; width: 0; height: 0; position: absolute; }
.s-switch-slider {
    position: absolute; inset: 0; background: var(--s-border);
    border-radius: 22px; transition: background 0.2s; cursor: pointer;
}
.s-switch-slider::before {
    content: ""; position: absolute; width: 16px; height: 16px;
    left: 3px; bottom: 3px; background: #fff; border-radius: 50%;
    transition: transform 0.2s;
}
.s-switch input:checked + .s-switch-slider { background: var(--s-success); }
.s-switch input:checked + .s-switch-slider::before { transform: translateX(16px); }

.input-group-text {
    background-color: var(--s-surface-alt) !important;
    border-color: var(--s-border) !important;
    color: var(--s-muted) !important;
}

/* Buttons */
.btn-primary, .btn-primary:active {
    background-color: var(--s-accent) !important;
    border-color: var(--s-accent) !important;
}
.btn-primary:hover {
    background-color: #6a5ce5 !important;
    border-color: #6a5ce5 !important;
}
.btn-outline-primary {
    color: var(--s-accent) !important;
    border-color: var(--s-accent) !important;
}
.btn-outline-primary:hover {
    background: var(--s-accent) !important;
    color: #fff !important;
}
.btn-secondary { background-color: var(--s-surface-alt) !important; border-color: var(--s-border) !important; color: var(--s-text) !important; }
.btn-outline-secondary {
    color: var(--s-nav-muted) !important;
    border-color: var(--s-border) !important;
}
.btn-outline-secondary:hover {
    background: var(--s-surface-alt) !important;
    color: var(--s-text) !important;
}
.btn-danger { background-color: var(--s-danger) !important; border-color: var(--s-danger) !important; }
.btn-outline-danger { color: var(--s-danger) !important; border-color: var(--s-danger) !important; }
.btn-outline-danger:hover { background: var(--s-danger) !important; color: #fff !important; }
.btn-success { background-color: var(--s-success) !important; border-color: var(--s-success) !important; }
.btn-warning { background-color: var(--s-warning) !important; border-color: var(--s-warning) !important; color: #000 !important; }
.btn-light { background-color: var(--s-surface-alt) !important; border-color: var(--s-border) !important; color: var(--s-text) !important; }
.btn-close { filter: invert(1) grayscale(100%) brightness(200%); }

/* Badges */
.badge.bg-secondary { background: var(--s-surface-alt) !important; color: var(--s-nav-muted) !important; }
.badge.bg-primary { background: var(--s-accent) !important; }
.badge.bg-success { background: var(--s-success) !important; }
.badge.bg-danger { background: var(--s-danger) !important; }
.badge.bg-warning { background: var(--s-warning) !important; color: #000 !important; }
.badge.bg-info { background: #0ea5e9 !important; }
.badge.bg-light { background: var(--s-surface-alt) !important; color: var(--s-text) !important; }
.badge.bg-dark { background: var(--s-bg) !important; color: var(--s-text) !important; }

/* Cards */
.card {
    background-color: var(--s-surface) !important;
    border-color: var(--s-border) !important;
    color: var(--s-text);
}
.card-header {
    background-color: var(--s-surface-alt) !important;
    border-bottom-color: var(--s-border) !important;
    color: var(--s-text);
}
.card-body { color: var(--s-text); }
.card-footer { background-color: var(--s-surface) !important; border-top-color: var(--s-border) !important; }

/* Alerts */
.alert { border-color: var(--s-border) !important; }
.alert-primary { background: rgba(124,110,246,0.12) !important; color: #9a8ffa !important; }
.alert-secondary { background: var(--s-surface-alt) !important; color: var(--s-nav-muted) !important; }
.alert-success { background: rgba(34,197,94,0.12) !important; color: #4ade80 !important; }
.alert-danger { background: rgba(239,68,68,0.12) !important; color: #f87171 !important; }
.alert-warning { background: rgba(234,179,8,0.12) !important; color: #facc15 !important; }
.alert-info { background: rgba(14,165,233,0.12) !important; color: #38bdf8 !important; }

/* Modals */
.modal-content {
    background-color: var(--s-surface) !important;
    border-color: var(--s-border) !important;
    color: var(--s-text);
}
.modal-header { border-bottom-color: var(--s-border) !important; }
.modal-footer { border-top-color: var(--s-border) !important; }
.modal-backdrop { background-color: rgba(0,0,0,0.6) !important; }

/* Dropdowns */
.dropdown-menu {
    background-color: var(--s-surface) !important;
    border-color: var(--s-border) !important;
    box-shadow: 0 8px 25px rgba(0,0,0,0.4);
}
.dropdown-item {
    color: var(--s-text) !important;
}
.dropdown-item:hover, .dropdown-item:focus {
    background-color: var(--s-surface-alt) !important;
    color: var(--s-accent) !important;
}
.dropdown-divider { border-top-color: var(--s-border) !important; }

/* Nested dropdown submenus (nav) */
.dropdown-submenu { position: relative; }
.dropdown-submenu > a.dropdown-item-submenu {
    display: flex; align-items: center;
    padding-right: 28px;
}
.dropdown-submenu > a.dropdown-item-submenu .dropdown-submenu-chev {
    position: absolute; right: 10px; top: 50%;
    transform: translateY(-50%);
    font-size: 10px; color: var(--s-muted);
    transition: transform 0.15s;
}
.dropdown-submenu.show > a.dropdown-item-submenu .dropdown-submenu-chev {
    transform: translateY(-50%) rotate(90deg);
    color: var(--s-accent);
}
.dropdown-submenu > .dropdown-menu-sub {
    display: none;
    position: absolute; left: 100%; top: -6px;
    margin: 0; min-width: 200px;
    border-radius: 8px;
}
.dropdown-submenu.show > .dropdown-menu-sub { display: block; }
@media (max-width: 900px) {
    .dropdown-submenu > .dropdown-menu-sub {
        position: static;
        box-shadow: none;
        border: none !important;
        padding-left: 10px;
    }
}

/* List groups */
.list-group-item {
    background-color: var(--s-surface) !important;
    border-color: var(--s-border) !important;
    color: var(--s-text) !important;
}
.list-group-item:hover { background-color: var(--s-surface-alt) !important; }
.list-group-item.active { background-color: var(--s-accent) !important; border-color: var(--s-accent) !important; }

/* Pagination */
.page-link {
    background-color: var(--s-surface) !important;
    border-color: var(--s-border) !important;
    color: var(--s-text) !important;
}
.page-link:hover { background-color: var(--s-surface-alt) !important; color: var(--s-accent) !important; }
.page-item.active .page-link { background-color: var(--s-accent) !important; border-color: var(--s-accent) !important; color: #fff !important; }
.page-item.disabled .page-link { background-color: var(--s-bg) !important; color: var(--s-muted) !important; }

/* Nav / Tabs */
.nav-tabs { border-bottom-color: var(--s-border) !important; }
.nav-tabs .nav-link { color: var(--s-muted) !important; border-color: transparent !important; }
.nav-tabs .nav-link:hover { border-color: var(--s-border) var(--s-border) transparent !important; color: var(--s-text) !important; }
.nav-tabs .nav-link.active { background-color: var(--s-surface) !important; border-color: var(--s-border) var(--s-border) var(--s-surface) !important; color: var(--s-text) !important; }
.nav-pills .nav-link { color: var(--s-muted); }
.nav-pills .nav-link.active { background-color: var(--s-accent) !important; color: #fff !important; }

/* Progress */
.progress { background-color: var(--s-bg-alt) !important; }
.progress-bar { background-color: var(--s-accent) !important; }

/* Tooltips / Popovers */
.tooltip-inner { background-color: var(--s-surface-alt) !important; color: var(--s-text) !important; }
.popover { background-color: var(--s-surface) !important; border-color: var(--s-border) !important; }
.popover-header { background-color: var(--s-surface-alt) !important; border-bottom-color: var(--s-border) !important; color: var(--s-text) !important; }
.popover-body { color: var(--s-text) !important; }

/* Accordion */
.accordion-item { background-color: var(--s-surface) !important; border-color: var(--s-border) !important; }
.accordion-button { background-color: var(--s-surface) !important; color: var(--s-text) !important; }
.accordion-button:not(.collapsed) { background-color: var(--s-surface-alt) !important; color: var(--s-accent) !important; }

/* Misc Bootstrap */
.border { border-color: var(--s-border) !important; }
.border-top, .border-bottom, .border-start, .border-end { border-color: var(--s-border) !important; }
.border-light { border-color: var(--s-border) !important; }
.bg-white, .bg-light { background-color: var(--s-surface) !important; }
.bg-body { background-color: var(--s-bg) !important; }
.shadow-sm { box-shadow: 0 2px 6px rgba(0,0,0,0.2) !important; }
.shadow { box-shadow: 0 4px 12px rgba(0,0,0,0.3) !important; }

/* Spinner */
.spinner-border { color: var(--s-accent); }

/* Avatars */
.avatar-sm { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; }
.avatar-md { width: 36px; height: 36px; border-radius: 50%; object-fit: cover; }
.avatar-lg { width: 80px; height: 80px; border-radius: 50%; border: 3px solid var(--s-border); }

/* Role badges */
.role-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    background: var(--s-bg);
    color: var(--s-accent);
    border: 1px solid var(--s-border);
}

/* Nav user */
.nav-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
}

/* ---- User dropdown menu ----------------------------------------- */

.user-dropdown-menu {
    position: fixed;
    z-index: 20000;
    background: var(--s-surface);
    border: 1px solid var(--s-border);
    border-radius: 10px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    min-width: 200px;
    padding: 6px 0;
}
.user-menu-item {
    padding: 8px 16px;
    font-size: 13px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: background 0.1s;
    color: var(--s-text);
}
.user-menu-item:hover {
    background: var(--s-surface-alt);
}
.user-menu-divider {
    height: 1px;
    background: var(--s-border);
    margin: 4px 12px;
}

/* ---- Impersonation badge ---------------------------------------- */

.imp-badge {
    font-size: 11px;
    font-weight: 600;
    color: #fff;
    padding: 2px 8px;
    border-radius: 10px;
    white-space: nowrap;
}

/* ---- Impersonate picker modal ----------------------------------- */

.imp-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.55);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}
.imp-picker {
    background: var(--s-surface);
    border: 1px solid var(--s-border);
    border-radius: 12px;
    padding: 24px 28px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
    max-width: 380px;
    width: 90%;
}
.imp-picker-title {
    font-weight: 700;
    font-size: 17px;
    margin-bottom: 4px;
    color: var(--s-text);
}
.imp-picker-list {
    max-height: 300px;
    overflow-y: auto;
}
.imp-picker-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.1s;
    font-size: 14px;
    color: var(--s-text);
}
.imp-picker-item:hover {
    background: var(--s-surface-alt);
}
.imp-picker-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}
.imp-picker-name {
    flex: 1;
    font-weight: 500;
}
.imp-picker-level {
    font-size: 12px;
    color: var(--s-muted);
}

/* ---- Scrollbar --------------------------------------------------- */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--s-border-alt); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: #505060; }

/* ---- jQuery UI overrides ----------------------------------------- */

.ui-resizable-handle {
    background: transparent !important;
    border: none !important;
}

/* ---- Toast notification ----------------------------------------- */

.sentinel-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--s-surface-alt);
    color: var(--s-text);
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    z-index: 60000;
    opacity: 0;
    transition: opacity 0.25s, transform 0.25s;
    pointer-events: none;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--s-border);
}
.sentinel-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ---- Mobile hamburger (hidden on desktop) ----------------------------- */
.mobile-menu-btn {
    display: none;
    background: none; border: none; color: var(--s-text);
    font-size: 20px; padding: 8px 12px; cursor: pointer;
}

/* ---- Mobile Navigation Drawer ----------------------------------------- */
.mobile-nav-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.5);
    z-index: 30000;
}
.mobile-nav-drawer {
    position: fixed; top: 0; left: 0; bottom: 0;
    width: 280px; max-width: 85vw;
    background: var(--s-surface); z-index: 30001;
    display: flex; flex-direction: column;
    box-shadow: 4px 0 20px rgba(0,0,0,0.4);
    transform: translateX(-100%);
    transition: transform 0.25s ease;
}
.mobile-nav-drawer.open { transform: translateX(0); }
.mobile-nav-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 18px; border-bottom: 1px solid var(--s-border);
}
.mobile-nav-title { font-weight: 700; font-size: 16px; }
.mobile-nav-close {
    background: none; border: none; color: var(--s-muted);
    font-size: 18px; padding: 4px 8px; cursor: pointer;
}
.mobile-nav-close:hover { color: var(--s-text); }
.mobile-nav-user {
    padding: 12px 18px; border-bottom: 1px solid var(--s-border);
    display: flex; align-items: center; gap: 10px; font-size: 13px;
}
.mobile-nav-items {
    flex: 1; overflow-y: auto; padding: 8px 0;
}
.mobile-nav-section {
    padding: 10px 18px 4px; font-size: 11px; font-weight: 600;
    color: var(--s-muted); text-transform: uppercase; letter-spacing: 0.5px;
}
.mobile-nav-subsection {
    padding: 6px 18px 2px 28px; font-size: 10.5px; font-weight: 600;
    color: var(--s-accent); text-transform: uppercase; letter-spacing: 0.4px;
    opacity: 0.85;
}

/* Learning-room live cursor overlay */
.learning-cursor {
    position: fixed; z-index: 10000;
    pointer-events: none;
    transition: left 0.08s linear, top 0.08s linear;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.5));
}
.learning-cursor.is-teacher {
    filter: drop-shadow(0 0 6px rgba(250, 204, 21, 0.6)) drop-shadow(0 2px 3px rgba(0,0,0,0.5));
}
.learning-cursor .learning-cursor-label {
    position: absolute; left: 14px; top: 12px;
    padding: 2px 7px; border-radius: 4px;
    font-size: 10.5px; font-weight: 700; color: #0b0d13;
    white-space: nowrap; letter-spacing: 0.2px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.4);
}

/* Click ripple broadcast from teacher */
.learning-click-ripple {
    position: fixed; z-index: 10001;
    pointer-events: none;
    transform: translate(-50%, -50%);
    width: 0; height: 0;
}
.learning-click-ripple .lcr-core {
    position: absolute; left: 50%; top: 50%;
    width: 10px; height: 10px; border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: lcr-core 0.45s ease-out forwards;
}
.learning-click-ripple .lcr-ring {
    position: absolute; left: 50%; top: 50%;
    width: 14px; height: 14px; border-radius: 50%;
    transform: translate(-50%, -50%);
    border: 2px solid currentColor;
    animation: lcr-ring 0.65s ease-out forwards;
}
/* LMB — teacher = gold */
.learning-click-ripple.is-lmb { color: #facc15; }
.learning-click-ripple.is-lmb .lcr-core { background: #facc15; box-shadow: 0 0 12px #facc15; }
/* RMB — cyan to differentiate */
.learning-click-ripple.is-rmb { color: #38bdf8; }
.learning-click-ripple.is-rmb .lcr-core { background: #38bdf8; box-shadow: 0 0 12px #38bdf8; }

@keyframes lcr-core {
    0%   { transform: translate(-50%, -50%) scale(0.4); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(1.2); opacity: 0; }
}
@keyframes lcr-ring {
    0%   { width: 14px; height: 14px; opacity: 0.9; border-width: 2px; }
    100% { width: 52px; height: 52px; opacity: 0;   border-width: 1px; }
}

/* Floating "Return to teacher" button (student only, when mirrored window is closed) */
#learning-return-btn {
    position: fixed;
    right: 20px; bottom: 20px;
    z-index: 10002;
    display: inline-flex; align-items: center;
    padding: 10px 16px; font-size: 13px; font-weight: 700;
    background: #facc15; color: #0b0d13; border: 1px solid rgba(250,204,21,0.7);
    border-radius: 22px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.45), 0 0 0 3px rgba(250,204,21,0.18);
    animation: lrb-pulse 2s ease-in-out infinite;
}
#learning-return-btn:hover { background: #fde047; color: #0b0d13; }
@keyframes lrb-pulse {
    0%, 100% { box-shadow: 0 6px 18px rgba(0,0,0,0.45), 0 0 0 3px rgba(250,204,21,0.18); }
    50%      { box-shadow: 0 6px 22px rgba(0,0,0,0.5),  0 0 0 8px rgba(250,204,21,0.08); }
}
.mobile-nav-link {
    display: flex; align-items: center; gap: 10px;
    padding: 11px 18px; font-size: 14px; color: var(--s-text);
    cursor: pointer; transition: background 0.12s;
    text-decoration: none;
}
.mobile-nav-link:hover, .mobile-nav-link:active { background: var(--s-surface-alt); }
.mobile-nav-link i { width: 20px; text-align: center; font-size: 14px; }

/* ---- Mobile: single-window mode -------------------------------------- */
@media (max-width: 768px) {
    .mobile-menu-btn { display: block; }

    /* Hide desktop navbar collapse, show only brand + hamburger */
    #navbarNav { display: none !important; }

    .system-menu { padding: 0 8px; }
    .system-menu .container-fluid {
        display: flex; justify-content: space-between; align-items: center;
    }

    /* Desktop area takes full height below the nav */
    #desktop {
        height: calc(100% - 45px);
        overflow: hidden;
    }

    /* Windows become fullscreen */
    .os-window {
        position: fixed !important;
        top: 45px !important;
        left: 0 !important;
        width: 100% !important;
        height: calc(100% - 45px) !important;
        border-radius: 0 !important;
        border: none !important;
        min-width: 0 !important;
        min-height: 0 !important;
        z-index: 200 !important;
    }

    /* Hide window header controls (minimize, maximize) — keep only close */
    .os-window-header {
        padding: 8px 14px;
    }
    .os-window-header .btn-minimize-win,
    .os-window-header .btn-maximize-win {
        display: none !important;
    }

    /* Wider close button for touch */
    .os-window-controls i {
        width: 52px;
        font-size: 16px;
    }

    /* Content area uses all remaining space */
    .os-window-content {
        padding: 10px;
    }

    /* Context menu disabled on mobile */
    #custom-context-menu { display: none !important; }

    /* Touch-friendly form controls */
    .form-control, .form-select, input[type="text"], input[type="number"],
    input[type="search"], input[type="date"], textarea, select {
        font-size: 16px !important; /* prevents iOS zoom */
        padding: 10px 12px !important;
    }

    /* Tables scroll horizontally */
    .table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }

    /* Sidebar-based fragments become stacked */
    .ev-main, .eval-main, .settings-main, .sk-module {
        flex-direction: column !important;
    }
    .ev-sidebar, .eval-sidebar, .settings-sidebar {
        width: 100% !important; min-width: 0 !important;
        max-height: 200px; border-right: none !important;
        border-bottom: 1px solid var(--s-border) !important;
    }

    /* Member detail panel full-width */
    .member-detail-panel {
        width: 100% !important;
    }

    /* Toast at top on mobile */
    .sentinel-toast {
        bottom: auto; top: 60px;
    }

    /* Login box responsive */
    .login-box {
        padding: 32px 24px; margin: 0 16px;
    }
}