/*
 * MLM Master — application design system.
 *
 * Loaded after the MegaDin theme (dist/css/main.css) by partials/styles and
 * layouts/app. Everything is scoped under body.app-ui so it wins over the
 * theme without !important, and restyles the existing Bootstrap 3 markup
 * (panels, tables, forms, buttons, labels, alerts, modals, pagination) so
 * every page inherits it. Page-specific CSS should stay rare.
 *
 * Sections: 1 tokens · 2 base/typography · 3 shell (header, sidebar,
 * footer) · 4 page header · 5 cards/panels · 6 stat cards · 7 buttons ·
 * 8 forms · 9 badges · 10 alerts · 11 tables · 12 data table · 13
 * pagination · 14 modals · 15 empty/loading states · 16 auth pages ·
 * 17 binary tree · 18 utilities/responsive.
 */

/* 1. Tokens ------------------------------------------------------------ */
:root {
    --ui-primary: #4F46E5;
    --ui-primary-600: #4338CA;
    --ui-primary-50: #EEF2FF;
    --ui-primary-100: #E0E7FF;

    --ui-success: #16A34A;
    --ui-success-50: #ECFDF3;
    --ui-warning: #D97706;
    --ui-warning-50: #FFFAEB;
    --ui-danger: #DC2626;
    --ui-danger-50: #FEF2F2;
    --ui-info: #0284C7;
    --ui-info-50: #F0F9FF;
    --ui-purple: #7C3AED;
    --ui-purple-50: #F5F3FF;
    --ui-left: #2563EB;
    --ui-left-50: #EFF6FF;
    --ui-right: #7C3AED;
    --ui-right-50: #F5F3FF;

    --ui-slate-900: #0F172A;
    --ui-slate-800: #1E293B;
    --ui-slate-700: #334155;
    --ui-slate-600: #475569;
    --ui-slate-500: #64748B;
    --ui-slate-400: #94A3B8;
    --ui-slate-300: #CBD5E1;
    --ui-slate-200: #E2E8F0;
    --ui-slate-100: #F1F5F9;
    --ui-slate-50: #F8FAFC;

    --ui-bg: #F4F6FB;
    --ui-surface: #FFFFFF;
    --ui-border: #E4E8F0;
    --ui-text: #1E293B;
    --ui-muted: #64748B;

    --ui-radius-sm: 6px;
    --ui-radius: 8px;
    --ui-radius-lg: 12px;
    --ui-shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);
    --ui-shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 2px 8px rgba(15, 23, 42, .05);
    --ui-shadow-lg: 0 10px 30px rgba(15, 23, 42, .12);
    --ui-ring: 0 0 0 3px rgba(79, 70, 229, .16);

    --ui-font: "Open Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    --ui-space: 16px;
}

/* 2. Base / typography ------------------------------------------------- */
body.app-ui {
    font-family: var(--ui-font);
    font-size: 14px;
    line-height: 1.55;
    color: var(--ui-text);
    background-color: var(--ui-bg);
}
body.app-ui h1, body.app-ui h2, body.app-ui h3, body.app-ui h4, body.app-ui h5 { color: var(--ui-slate-900); font-weight: 600; }
body.app-ui a { color: var(--ui-primary); }
body.app-ui a:hover, body.app-ui a:focus { color: var(--ui-primary-600); }
body.app-ui .text-muted { color: var(--ui-muted); }
body.app-ui .text-success { color: var(--ui-success); }
body.app-ui .text-danger { color: var(--ui-danger); }
body.app-ui .text-warning { color: var(--ui-warning); }
body.app-ui .text-info { color: var(--ui-info); }
body.app-ui .text-primary { color: var(--ui-primary); }
body.app-ui code { color: var(--ui-primary-600); background: var(--ui-primary-50); border-radius: 4px; padding: 2px 6px; font-size: 90%; }
body.app-ui hr { border-top-color: var(--ui-border); }
body.app-ui .num, body.app-ui .text-right { font-variant-numeric: tabular-nums; }

/* 3. Shell --------------------------------------------------------------- */
body.app-ui .ui-header {
    background: var(--ui-surface);
    border-bottom: 1px solid var(--ui-border);
    box-shadow: var(--ui-shadow-sm);
}
body.app-ui .ui-header .navbar-brand { display: flex; align-items: center; height: 50px; padding: 0 18px; }
body.app-ui .ui-header .navbar-brand img { max-height: 30px; width: auto; }
body.app-ui .ui-header .toggle-btn { color: var(--ui-slate-600); }
body.app-ui .ui-header .dropdown-usermenu > a { color: var(--ui-slate-700); font-weight: 600; }
body.app-ui .ui-header .user-avatar { color: var(--ui-primary); }
body.app-ui .dropdown-menu {
    border: 1px solid var(--ui-border);
    border-radius: var(--ui-radius);
    box-shadow: var(--ui-shadow-lg);
    padding: 6px;
}
body.app-ui .dropdown-menu > li > a { border-radius: var(--ui-radius-sm); padding: 8px 12px; color: var(--ui-slate-700); }
body.app-ui .dropdown-menu > li > a:hover { background: var(--ui-slate-100); color: var(--ui-slate-900); }
body.app-ui .dropdown-menu > li > a > i { width: 18px; color: var(--ui-slate-400); }

body.app-ui .ui-aside { background: var(--ui-slate-900); border-right: 0; color: var(--ui-slate-400); }
body.app-ui .ui-aside .nav > li > a {
    color: var(--ui-slate-300);
    margin: 2px 10px;
    padding: 10px 12px;
    border-radius: var(--ui-radius);
    font-size: 13.5px;
}
body.app-ui .ui-aside .nav > li > a > i:first-child { color: var(--ui-slate-400); width: 18px; text-align: center; }
body.app-ui .ui-aside .nav > li > a:hover, body.app-ui .ui-aside .nav > li > a:focus { background: rgba(148, 163, 184, .10); color: #fff; }
body.app-ui .ui-aside .nav > li.active > a { background: rgba(99, 102, 241, .20); color: #fff; }
body.app-ui .ui-aside .nav > li.active > a > i:first-child { color: #A5B4FC; }
body.app-ui .ui-aside .nav-sub { background: transparent; }
body.app-ui .ui-aside .nav-sub > li > a { color: var(--ui-slate-400); margin: 1px 10px 1px 22px; padding: 8px 12px; border-radius: var(--ui-radius-sm); font-size: 13px; }
body.app-ui .ui-aside .nav-sub > li > a:hover { color: #fff; background: rgba(148, 163, 184, .08); }
body.app-ui .ui-aside .nav-sub > li.active > a { color: #fff; background: rgba(148, 163, 184, .10); }
body.app-ui .ui-aside .nav-sub > li > a > i:first-child { font-size: 12px; color: var(--ui-slate-500); }
body.app-ui .ui-aside .nav-sub > li.active > a > i:first-child { color: #A5B4FC; }

body.app-ui .ui-content-body { padding: 24px 24px 32px; }
body.app-ui .ui-footer { background: var(--ui-surface); border-top: 1px solid var(--ui-border); color: var(--ui-muted); padding-left: 24px; }

body.app-ui .impersonation-bar { background: var(--ui-warning-50); color: #92400E; border-bottom: 1px solid #FDE68A; }

/* Top-of-page AJAX progress bar (app-ui.js) */
#app-progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; z-index: 2000; background: var(--ui-primary); opacity: 0; transition: width .4s ease, opacity .3s ease; }
#app-progress.is-active { opacity: 1; width: 70%; }
#app-progress.is-done { opacity: 0; width: 100%; }

/* 4. Page header --------------------------------------------------------- */
body.app-ui .page-header-ui {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 12px 24px;
    margin: 0 0 22px;
}
body.app-ui .page-header-ui .page-breadcrumb { list-style: none; margin: 0 0 6px; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; font-size: 12.5px; color: var(--ui-muted); }
body.app-ui .page-header-ui .page-breadcrumb li + li::before { content: "/"; margin-right: 6px; color: var(--ui-slate-300); }
body.app-ui .page-header-ui .page-breadcrumb a { color: var(--ui-muted); }
body.app-ui .page-header-ui .page-breadcrumb a:hover { color: var(--ui-primary); }
body.app-ui .page-header-ui .page-breadcrumb li:last-child { color: var(--ui-slate-700); font-weight: 600; }
body.app-ui .page-header-ui h1.page-title { font-size: 22px; font-weight: 700; margin: 0; color: var(--ui-slate-900); letter-spacing: -.01em; line-height: 1.3; }
body.app-ui .page-header-ui .page-title-meta { font-size: 14px; font-weight: 500; color: var(--ui-muted); margin-left: 6px; }
body.app-ui .page-header-ui .page-description { margin: 4px 0 0; color: var(--ui-muted); font-size: 13.5px; max-width: 760px; }
body.app-ui .page-header-ui .page-description p { margin: 0; }
body.app-ui .page-header-ui .page-actions { display: flex; flex-wrap: wrap; gap: 8px; }
body.app-ui .page-header-ui .page-actions .btn { margin: 0; }
/* Legacy headings still using the bare class */
body.app-ui .page-title { color: var(--ui-slate-900); font-weight: 700; font-size: 22px; }
body.app-ui .page-title small { color: var(--ui-muted); font-size: 14px; font-weight: 500; }

.section-heading { display: flex; align-items: center; gap: 8px; margin: 26px 0 12px; font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--ui-slate-500); }
.section-heading > i { color: var(--ui-primary); }

/* 5. Cards / panels ------------------------------------------------------ */
body.app-ui .panel,
body.app-ui .ui-card {
    background: var(--ui-surface);
    border: 1px solid var(--ui-border);
    border-radius: var(--ui-radius-lg);
    box-shadow: var(--ui-shadow);
    margin-bottom: 22px;
}
body.app-ui .panel > .panel-heading,
body.app-ui .ui-card-header {
    background: var(--ui-surface);
    border-bottom: 1px solid var(--ui-border);
    border-radius: var(--ui-radius-lg) var(--ui-radius-lg) 0 0;
    padding: 14px 20px;
    color: var(--ui-slate-900);
    text-transform: none;
    font-weight: 600;
    font-size: 15px;
}
body.app-ui .panel > .panel-heading .panel-title { font-size: 15px; font-weight: 600; color: var(--ui-slate-900); text-transform: none; }
body.app-ui .panel > .panel-heading .panel-title > i,
body.app-ui .ui-card-header > i { color: var(--ui-primary); margin-right: 6px; }
body.app-ui .panel > .panel-body, body.app-ui .ui-card-body { padding: 20px; }
body.app-ui .panel > .panel-footer { background: var(--ui-slate-50); border-top: 1px solid var(--ui-border); border-radius: 0 0 var(--ui-radius-lg) var(--ui-radius-lg); padding: 12px 20px; }
body.app-ui .panel > .table, body.app-ui .panel > .table-responsive > .table { margin-bottom: 0; }
body.app-ui .panel-primary > .panel-heading { border-top: 3px solid var(--ui-primary); }
body.app-ui .panel-success > .panel-heading { border-top: 3px solid var(--ui-success); }
body.app-ui .panel-warning > .panel-heading { border-top: 3px solid var(--ui-warning); }
body.app-ui .panel-danger > .panel-heading { border-top: 3px solid var(--ui-danger); }
body.app-ui .panel-info > .panel-heading { border-top: 3px solid var(--ui-info); }
body.app-ui .panel-primary, body.app-ui .panel-success, body.app-ui .panel-warning, body.app-ui .panel-danger, body.app-ui .panel-info { border-color: var(--ui-border); }
body.app-ui .well { background: var(--ui-slate-50); border: 1px solid var(--ui-border); border-radius: var(--ui-radius); box-shadow: none; }
body.app-ui .list-group-item { border-color: var(--ui-border); }

/* 6. Stat cards (<x-stat-card>) ------------------------------------------ */
.stat-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-bottom: 22px; }
.stat-grid.stat-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.stat-card {
    --accent: var(--ui-primary);
    --accent-50: var(--ui-primary-50);
    position: relative;
    display: flex;
    gap: 14px;
    align-items: flex-start;
    background: var(--ui-surface);
    border: 1px solid var(--ui-border);
    border-radius: var(--ui-radius-lg);
    box-shadow: var(--ui-shadow);
    padding: 18px;
    color: var(--ui-text);
    transition: box-shadow .15s ease, transform .15s ease, border-color .15s ease;
    min-width: 0;
}
a.stat-card:hover, a.stat-card:focus { text-decoration: none; color: var(--ui-text); box-shadow: var(--ui-shadow-lg); transform: translateY(-1px); border-color: var(--ui-slate-300); }
.stat-card-icon { flex: 0 0 42px; height: 42px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 18px; color: var(--accent); background: var(--accent-50); }
.stat-card-body { min-width: 0; }
.stat-card-label { font-size: 12.5px; font-weight: 600; color: var(--ui-muted); margin-bottom: 2px; }
.stat-card-value { font-size: 22px; font-weight: 700; color: var(--ui-slate-900); line-height: 1.25; letter-spacing: -.01em; font-variant-numeric: tabular-nums; word-break: break-word; }
.stat-card-sub { font-size: 12px; color: var(--ui-muted); margin-top: 2px; }
.stat-card--primary { --accent: var(--ui-primary); --accent-50: var(--ui-primary-50); }
.stat-card--success { --accent: var(--ui-success); --accent-50: var(--ui-success-50); }
.stat-card--warning { --accent: var(--ui-warning); --accent-50: var(--ui-warning-50); }
.stat-card--danger { --accent: var(--ui-danger); --accent-50: var(--ui-danger-50); }
.stat-card--info { --accent: var(--ui-info); --accent-50: var(--ui-info-50); }
.stat-card--purple, .stat-card--right { --accent: var(--ui-purple); --accent-50: var(--ui-purple-50); }
.stat-card--left { --accent: var(--ui-left); --accent-50: var(--ui-left-50); }
.stat-card--neutral { --accent: var(--ui-slate-600); --accent-50: var(--ui-slate-100); }
.stat-card--highlight { background: linear-gradient(135deg, var(--ui-primary) 0%, #6366F1 100%); border-color: transparent; color: #fff; }
.stat-card--highlight .stat-card-label, .stat-card--highlight .stat-card-sub { color: rgba(255, 255, 255, .82); }
.stat-card--highlight .stat-card-value { color: #fff; }
.stat-card--highlight .stat-card-icon { background: rgba(255, 255, 255, .18); color: #fff; }

/* Quick-action cards (stat-card used as a link) */
.stat-card--action .stat-card-value { font-size: 15px; font-weight: 700; }

/* Wallet balance card */
body.app-ui .wallet-balance-card { border-top: 3px solid var(--ui-success); }
.wallet-balance { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 18px; }
.wallet-balance .stat-card-icon { --accent: var(--ui-success); --accent-50: var(--ui-success-50); }
.wallet-balance-label { font-size: 12.5px; font-weight: 600; color: var(--ui-muted); }
.wallet-balance-value { font-size: 30px; font-weight: 700; color: var(--ui-slate-900); line-height: 1.2; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.wallet-balance-sub { font-size: 12px; color: var(--ui-muted); }
.wallet-balance-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.wallet-balance-actions .btn { flex: 1 1 auto; margin: 0; }

/* Report index cards */
.report-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; margin-bottom: 8px; }
.report-card { display: flex; flex-direction: column; gap: 6px; padding: 18px 20px; background: var(--ui-surface); border: 1px solid var(--ui-border); border-radius: var(--ui-radius-lg); box-shadow: var(--ui-shadow); color: var(--ui-text); transition: box-shadow .15s ease, transform .15s ease, border-color .15s ease; }
.report-card:hover, .report-card:focus { text-decoration: none; color: var(--ui-text); box-shadow: var(--ui-shadow-lg); transform: translateY(-1px); border-color: var(--ui-primary-100); }
.report-card-title { font-size: 15px; font-weight: 700; color: var(--ui-slate-900); }
.report-card-desc { flex: 1; font-size: 13px; color: var(--ui-muted); line-height: 1.55; }
.report-card-link { font-size: 12.5px; font-weight: 700; color: var(--ui-primary); margin-top: 4px; }

/* Key/value detail list (profile pages, modals) */
.detail-list { display: grid; grid-template-columns: minmax(120px, 38%) 1fr; margin: 0; }
.detail-list > dt, .detail-list > dd { padding: 10px 0; border-bottom: 1px solid var(--ui-slate-100); margin: 0; }
.detail-list > dt { color: var(--ui-muted); font-weight: 600; font-size: 13px; }
.detail-list > dd { color: var(--ui-slate-900); }
.detail-list > dt:last-of-type, .detail-list > dd:last-of-type { border-bottom: 0; }

/* Root user picker (<x-root-search>) */
.root-search { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; padding: 14px 18px; margin-bottom: 22px; }
.root-search-label { display: flex; align-items: center; gap: 12px; margin-right: auto; line-height: 1.3; }
.root-search-label strong { color: var(--ui-slate-900); font-size: 14px; }
.root-search-label .stat-card-icon { flex-basis: 38px; height: 38px; font-size: 16px; }
.root-search-field { position: relative; flex: 0 1 320px; }
.root-search-field > .fa { position: absolute; left: 13px; top: 50%; margin-top: -7px; color: var(--ui-slate-400); }
body.app-ui .root-search-field .form-control { padding-left: 36px; }
@media (max-width: 767px) { .root-search-field { flex-basis: 100%; } .root-search .btn { width: 100%; } }

/* 7. Buttons --------------------------------------------------------------- */
body.app-ui .btn {
    border-radius: var(--ui-radius);
    font-weight: 600;
    font-size: 13.5px;
    padding: 8px 16px;
    line-height: 1.4;
    box-shadow: none;
    transition: background-color .15s ease, border-color .15s ease, color .15s ease, box-shadow .15s ease;
}
body.app-ui .btn > .fa { margin-right: 4px; }
body.app-ui .btn:focus, body.app-ui .btn:active:focus { outline: 0; box-shadow: var(--ui-ring); }
body.app-ui .btn-lg { padding: 11px 20px; font-size: 15px; }
body.app-ui .btn-sm { padding: 6px 12px; font-size: 12.5px; border-radius: var(--ui-radius-sm); }
body.app-ui .btn-xs { padding: 3px 9px; font-size: 12px; border-radius: var(--ui-radius-sm); }
body.app-ui .btn-default { background: var(--ui-surface); border-color: var(--ui-slate-300); color: var(--ui-slate-700); }
body.app-ui .btn-default:hover, body.app-ui .btn-default:focus { background: var(--ui-slate-50); border-color: var(--ui-slate-400); color: var(--ui-slate-900); }
body.app-ui .btn-primary, body.app-ui .btn-primary:focus { background: var(--ui-primary) !important; border-color: var(--ui-primary) !important; color: #fff !important; }
body.app-ui .btn-primary:hover, body.app-ui .btn-primary:active { background: var(--ui-primary-600) !important; border-color: var(--ui-primary-600) !important; }
body.app-ui .btn-success { background: var(--ui-success); border-color: var(--ui-success); color: #fff; }
body.app-ui .btn-success:hover, body.app-ui .btn-success:focus { background: #15803D; border-color: #15803D; color: #fff; }
body.app-ui .btn-warning { background: var(--ui-warning); border-color: var(--ui-warning); color: #fff; }
body.app-ui .btn-warning:hover, body.app-ui .btn-warning:focus { background: #B45309; border-color: #B45309; color: #fff; }
body.app-ui .btn-danger { background: var(--ui-danger); border-color: var(--ui-danger); color: #fff; }
body.app-ui .btn-danger:hover, body.app-ui .btn-danger:focus { background: #B91C1C; border-color: #B91C1C; color: #fff; }
body.app-ui .btn-info { background: var(--ui-info); border-color: var(--ui-info); color: #fff; }
body.app-ui .btn-info:hover, body.app-ui .btn-info:focus { background: #0369A1; border-color: #0369A1; color: #fff; }
body.app-ui .btn-link { color: var(--ui-primary); font-weight: 600; }
body.app-ui .btn[disabled], body.app-ui .btn.disabled { opacity: .55; cursor: not-allowed; }

/* Loading button (app-ui.js adds .is-loading on submit) */
body.app-ui .btn.is-loading { position: relative; color: transparent !important; pointer-events: none; }
body.app-ui .btn.is-loading::after {
    content: "";
    position: absolute; left: 50%; top: 50%;
    width: 16px; height: 16px; margin: -8px 0 0 -8px;
    border: 2px solid rgba(255, 255, 255, .55);
    border-top-color: #fff;
    border-radius: 50%;
    animation: ui-spin .7s linear infinite;
}
body.app-ui .btn-default.is-loading::after { border-color: var(--ui-slate-300); border-top-color: var(--ui-slate-600); }

/* Compact icon action buttons (data table, tree) */
.ui-icon-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 30px; height: 30px; padding: 0;
    border-radius: var(--ui-radius-sm);
    border: 1px solid var(--ui-border);
    background: var(--ui-surface);
    color: var(--ui-slate-600);
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
    transition: all .15s ease;
    vertical-align: middle;
}
.ui-icon-btn:hover, .ui-icon-btn:focus { text-decoration: none; outline: 0; background: var(--ui-slate-100); color: var(--ui-slate-900); border-color: var(--ui-slate-300); }
.ui-icon-btn:focus { box-shadow: var(--ui-ring); }
.ui-icon-btn--primary { color: var(--ui-primary); }
.ui-icon-btn--primary:hover { background: var(--ui-primary-50); color: var(--ui-primary-600); border-color: var(--ui-primary-100); }
.ui-icon-btn--success { color: var(--ui-success); }
.ui-icon-btn--success:hover { background: var(--ui-success-50); color: #15803D; border-color: #BBF7D0; }
.ui-icon-btn--info { color: var(--ui-info); }
.ui-icon-btn--info:hover { background: var(--ui-info-50); color: #0369A1; border-color: #BAE6FD; }
.ui-icon-btn--danger { color: var(--ui-danger); border-color: #FECACA; }
.ui-icon-btn--danger:hover { background: var(--ui-danger-50); color: #B91C1C; border-color: #FCA5A5; }

/* 8. Forms ----------------------------------------------------------------- */
body.app-ui label, body.app-ui .control-label { font-weight: 600; font-size: 13px; color: var(--ui-slate-700); margin-bottom: 6px; }
body.app-ui .form-group { margin-bottom: 18px; }
body.app-ui .form-control {
    height: 40px;
    padding: 8px 12px;
    font-size: 14px;
    color: var(--ui-slate-900);
    background-color: var(--ui-surface);
    border: 1px solid var(--ui-slate-300);
    border-radius: var(--ui-radius);
    box-shadow: none;
    transition: border-color .15s ease, box-shadow .15s ease;
}
body.app-ui textarea.form-control { height: auto; min-height: 90px; }
body.app-ui select.form-control { padding-right: 30px; }
body.app-ui .form-control::placeholder { color: var(--ui-slate-400); }
body.app-ui .form-control:hover { border-color: var(--ui-slate-400); }
body.app-ui .form-control:focus { border-color: var(--ui-primary); box-shadow: var(--ui-ring); outline: 0; }
body.app-ui .form-control[disabled], body.app-ui fieldset[disabled] .form-control { background: var(--ui-slate-100); color: var(--ui-slate-500); cursor: not-allowed; border-color: var(--ui-slate-200); }
body.app-ui .form-control[readonly] { background: var(--ui-slate-50); color: var(--ui-slate-700); border-style: dashed; }
body.app-ui .input-lg.form-control { height: 46px; }
body.app-ui .input-sm.form-control { height: 34px; font-size: 13px; }
body.app-ui .input-group .form-control:first-child { border-radius: var(--ui-radius) 0 0 var(--ui-radius); }
body.app-ui .input-group .form-control:last-child { border-radius: 0 var(--ui-radius) var(--ui-radius) 0; }
body.app-ui .input-group-addon { background: var(--ui-slate-50); border-color: var(--ui-slate-300); color: var(--ui-slate-500); border-radius: var(--ui-radius); }
body.app-ui .input-group-btn > .btn { height: 40px; }
body.app-ui .input-group-btn:last-child > .btn { border-radius: 0 var(--ui-radius) var(--ui-radius) 0; }
body.app-ui .help-block, body.app-ui .form-text, body.app-ui .form-group > small.text-muted { display: block; margin-top: 6px; font-size: 12.5px; color: var(--ui-muted); }

/* Error state: Bootstrap 4 style .is-invalid (used across these templates) + BS3 .has-error */
body.app-ui .form-control.is-invalid,
body.app-ui .has-error .form-control,
body.app-ui .form-control.error {
    border-color: var(--ui-danger);
    background: #FFFBFB;
    padding-right: 36px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Ccircle cx='8' cy='8' r='7' fill='%23DC2626'/%3E%3Cpath d='M8 4.2v4.6' stroke='%23fff' stroke-width='1.6' stroke-linecap='round'/%3E%3Ccircle cx='8' cy='11.3' r='.95' fill='%23fff'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 11px center;
    background-size: 16px 16px;
}
body.app-ui select.form-control.is-invalid { background-position: right 26px center; }
body.app-ui .form-control.is-invalid:focus, body.app-ui .has-error .form-control:focus { box-shadow: 0 0 0 3px rgba(220, 38, 38, .15); }
body.app-ui .form-control.is-valid, body.app-ui .has-success .form-control { border-color: var(--ui-success); }
body.app-ui .form-control.is-valid:focus, body.app-ui .has-success .form-control:focus { box-shadow: 0 0 0 3px rgba(22, 163, 74, .15); }
body.app-ui .form-group small.text-danger,
body.app-ui .form-group .invalid-feedback,
body.app-ui .has-error .help-block {
    display: flex; align-items: flex-start; gap: 6px;
    margin-top: 6px; font-size: 12.5px; font-weight: 600; color: var(--ui-danger);
}
body.app-ui .form-group small.text-danger::before,
body.app-ui .form-group .invalid-feedback::before { content: "\f06a"; font-family: FontAwesome; font-weight: normal; line-height: 1.5; }
body.app-ui .form-group small.text-danger:empty { display: none; }
body.app-ui .form-group small.text-success { display: flex; align-items: center; gap: 6px; margin-top: 6px; font-size: 12.5px; font-weight: 600; color: var(--ui-success); }
body.app-ui .form-group small.text-success:not(:empty)::before { content: "\f058"; font-family: FontAwesome; font-weight: normal; }
body.app-ui .form-group.is-busy { position: relative; }
body.app-ui .form-group.is-busy .form-control { background-image: none; padding-right: 36px; }
body.app-ui .form-group.is-busy::after {
    content: ""; position: absolute; right: 12px; top: 36px;
    width: 16px; height: 16px; border-radius: 50%;
    border: 2px solid var(--ui-slate-200); border-top-color: var(--ui-primary);
    animation: ui-spin .7s linear infinite;
}
body.app-ui .checkbox label, body.app-ui .radio label { font-weight: 500; }

/* Form sections */
.form-section { padding: 4px 0 6px; }
.form-section + .form-section { border-top: 1px solid var(--ui-border); margin-top: 8px; padding-top: 22px; }
.form-section-title { display: flex; align-items: center; gap: 8px; font-size: 14.5px; font-weight: 700; color: var(--ui-slate-900); margin: 0 0 4px; }
.form-section-title > i { color: var(--ui-primary); width: 18px; }
.form-section-desc { font-size: 12.5px; color: var(--ui-muted); margin: 0 0 16px; }
.form-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; border-top: 1px solid var(--ui-border); margin-top: 8px; padding-top: 18px; }
.form-actions .btn { margin: 0; }

/* 9. Badges ---------------------------------------------------------------- */
/* Existing `label label-*` markup (rendered by many DataTable columns) and
   the new .badge-ui classes share one soft, pill-shaped look. */
body.app-ui .label,
.badge-ui {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 11.5px;
    font-weight: 600;
    line-height: 1.5;
    letter-spacing: .01em;
    white-space: nowrap;
    vertical-align: middle;
    color: var(--ui-slate-700);
    background: var(--ui-slate-100);
    border: 1px solid var(--ui-slate-200);
}
body.app-ui .label-default { color: var(--ui-slate-600); background: var(--ui-slate-100); border-color: var(--ui-slate-200); }
body.app-ui .label-primary { color: var(--ui-primary-600); background: var(--ui-primary-50); border-color: var(--ui-primary-100); }
body.app-ui .label-success, .badge-ui--success { color: #15803D; background: var(--ui-success-50); border-color: #BBF7D0; }
body.app-ui .label-warning, .badge-ui--warning { color: #B45309; background: var(--ui-warning-50); border-color: #FDE68A; }
body.app-ui .label-danger, .badge-ui--danger { color: #B91C1C; background: var(--ui-danger-50); border-color: #FECACA; }
body.app-ui .label-info, .badge-ui--info { color: #0369A1; background: var(--ui-info-50); border-color: #BAE6FD; }
body.app-ui .label-left, .badge-ui--left { color: #1D4ED8; background: var(--ui-left-50); border-color: #BFDBFE; }
body.app-ui .label-right, body.app-ui .label-purple, .badge-ui--right, .badge-ui--purple { color: #6D28D9; background: var(--ui-purple-50); border-color: #DDD6FE; }
.badge-ui--neutral { color: var(--ui-slate-600); background: var(--ui-slate-100); border-color: var(--ui-slate-200); }
.badge-ui--primary { color: var(--ui-primary-600); background: var(--ui-primary-50); border-color: var(--ui-primary-100); }
.badge-dot::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
body.app-ui .badge { background: var(--ui-primary); border-radius: 999px; font-weight: 600; }

/* 10. Alerts --------------------------------------------------------------- */
body.app-ui .alert {
    position: relative;
    border: 1px solid;
    border-left-width: 4px;
    border-radius: var(--ui-radius);
    padding: 12px 16px 12px 44px;
    font-size: 13.5px;
    box-shadow: var(--ui-shadow-sm);
    margin-bottom: 18px;
}
body.app-ui .alert::before {
    font-family: FontAwesome;
    position: absolute; left: 16px; top: 12px;
    font-size: 16px; line-height: 1.3;
}
body.app-ui .alert ul { margin: 0; padding-left: 18px; }
body.app-ui .alert-success { color: #14532D; background: var(--ui-success-50); border-color: #BBF7D0; border-left-color: var(--ui-success); }
body.app-ui .alert-success::before { content: "\f058"; color: var(--ui-success); }
body.app-ui .alert-danger { color: #7F1D1D; background: var(--ui-danger-50); border-color: #FECACA; border-left-color: var(--ui-danger); }
body.app-ui .alert-danger::before { content: "\f06a"; color: var(--ui-danger); }
body.app-ui .alert-warning { color: #78350F; background: var(--ui-warning-50); border-color: #FDE68A; border-left-color: var(--ui-warning); }
body.app-ui .alert-warning::before { content: "\f071"; color: var(--ui-warning); }
body.app-ui .alert-info { color: #0C4A6E; background: var(--ui-info-50); border-color: #BAE6FD; border-left-color: var(--ui-info); }
body.app-ui .alert-info::before { content: "\f05a"; color: var(--ui-info); }
body.app-ui .alert .close { opacity: .45; text-shadow: none; }
body.app-ui .alert .alert-link { color: inherit; text-decoration: underline; }
/* The impersonation banner is an alert but a full-width bar, not a card */
body.app-ui .alert.impersonation-bar { border-radius: 0; border-width: 0 0 1px; box-shadow: none; padding: 10px 16px; margin: 0; }
body.app-ui .alert.impersonation-bar::before { content: none; }

/* 11. Tables (all tables) -------------------------------------------------- */
body.app-ui .table { color: var(--ui-text); margin-bottom: 0; }
body.app-ui .table > thead > tr > th {
    background: var(--ui-slate-50);
    color: var(--ui-slate-500);
    font-size: 11.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
    border-bottom: 1px solid var(--ui-border);
    border-top: 0;
    padding: 11px 14px;
    vertical-align: middle;
    white-space: nowrap;
}
body.app-ui .table > thead > tr > th a { color: inherit; text-decoration: none; }
body.app-ui .table > thead > tr > th a:hover { color: var(--ui-primary); }
body.app-ui .table > tbody > tr > td,
body.app-ui .table > tbody > tr > th,
body.app-ui .table > tfoot > tr > td,
body.app-ui .table > tfoot > tr > th { padding: 11px 14px; border-top: 1px solid var(--ui-slate-100); vertical-align: middle; }
body.app-ui .table > tbody > tr > th { color: var(--ui-muted); font-weight: 600; font-size: 13px; }
body.app-ui .table-hover > tbody > tr:hover { background: #F8FAFF; }
body.app-ui .table-striped > tbody > tr:nth-of-type(odd) { background: var(--ui-slate-50); }
body.app-ui .table-bordered { border: 0; }
body.app-ui .table-bordered > thead > tr > th, body.app-ui .table-bordered > tbody > tr > td, body.app-ui .table-bordered > tbody > tr > th, body.app-ui .table-bordered > tfoot > tr > td, body.app-ui .table-bordered > tfoot > tr > th { border-left: 0; border-right: 0; }
body.app-ui .table > tfoot > tr > td, body.app-ui .table > tfoot > tr > th { background: var(--ui-slate-50); font-weight: 700; }
/* Plain tables sitting in a panel body get a rounded frame */
body.app-ui .panel-body > .table, body.app-ui .panel-body > .table-responsive { border: 1px solid var(--ui-border); border-radius: var(--ui-radius); overflow: hidden; }
body.app-ui .panel-body > .table-responsive { overflow-x: auto; }
body.app-ui .table-responsive { border: 0; -webkit-overflow-scrolling: touch; }

/* 12. Data table (<x-data-table>) ------------------------------------------ */
.dt-card { background: var(--ui-surface); border: 1px solid var(--ui-border); border-radius: var(--ui-radius-lg); box-shadow: var(--ui-shadow); margin-bottom: 22px; }
.dt-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 20px 0; }
.dt-title { margin: 0; font-size: 15px; font-weight: 700; color: var(--ui-slate-900); }
.dt-count { margin-left: 8px; font-size: 12px; font-weight: 600; color: var(--ui-muted); background: var(--ui-slate-100); border-radius: 999px; padding: 2px 9px; }
.dt-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; padding: 14px 20px; }
.dt-search { position: relative; flex: 1 1 260px; max-width: 380px; }
.dt-search > .fa { position: absolute; left: 13px; top: 50%; margin-top: -7px; color: var(--ui-slate-400); pointer-events: none; }
body.app-ui .dt-search .form-control { padding-left: 36px; }
.dt-toolbar-spacer { flex: 1 1 auto; }
.dt-perpage { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ui-muted); white-space: nowrap; }
.dt-perpage label { margin: 0; font-weight: 600; color: var(--ui-muted); }
body.app-ui .dt-perpage .form-control { width: auto; height: 36px; padding: 6px 28px 6px 10px; }
.dt-filter-toggle .dt-filter-count { display: inline-block; min-width: 18px; margin-left: 4px; padding: 0 5px; border-radius: 999px; background: var(--ui-primary); color: #fff; font-size: 11px; line-height: 18px; text-align: center; }
.dt-filters { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 0 14px; margin: 0 20px 14px; padding: 14px 16px 2px; background: var(--ui-slate-50); border: 1px solid var(--ui-border); border-radius: var(--ui-radius); }
.dt-filters-grid { flex: 1 1 420px; display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 0 14px; }
.dt-filters .form-group { margin-bottom: 12px; }
.dt-filters label { font-size: 12px; color: var(--ui-slate-600); margin-bottom: 4px; }
body.app-ui .dt-filters .form-control { height: 38px; }
.dt-filters-actions { display: flex; gap: 8px; justify-content: flex-end; margin-left: auto; padding: 0 0 12px; }
body.app-ui .dt-filters-actions .btn-sm { height: 38px; padding: 0 14px; display: inline-flex; align-items: center; gap: 6px; }
.dt-filters-actions .btn { margin: 0; }
.dt-table-wrap { border-top: 1px solid var(--ui-border); overflow-x: auto; -webkit-overflow-scrolling: touch; }
body.app-ui .dt-table { margin: 0; }
body.app-ui .dt-table > thead > tr > th:first-child, body.app-ui .dt-table > tbody > tr > td:first-child { padding-left: 20px; }
body.app-ui .dt-table > thead > tr > th:last-child, body.app-ui .dt-table > tbody > tr > td:last-child { padding-right: 20px; }
body.app-ui .dt-table > tbody > tr > td { white-space: nowrap; }
body.app-ui .dt-table > tbody > tr > td.wrap, body.app-ui .dt-table > tbody > tr > td.text-wrap { white-space: normal; }
.dt-sort-icon { margin-left: 4px; font-size: 11px; color: var(--ui-slate-300); }
.is-sorted .dt-sort-icon { color: var(--ui-primary); }
body.app-ui .dt-table > thead > tr > th.is-sorted { color: var(--ui-slate-800); }
.dt-actions-col { width: 1%; white-space: nowrap; text-align: right; }
body.app-ui .dt-table > thead > tr > th.dt-actions-col { text-align: right; }
.dt-actions { display: inline-flex; flex-wrap: nowrap; gap: 4px; justify-content: flex-end; }
.dt-actions form { display: inline; margin: 0; }
.dt-more { display: inline-block; }
.dt-menu { min-width: 200px; }
.dt-menu > li > form { display: block; margin: 0; }
.dt-menu-item { display: flex !important; align-items: center; gap: 10px; width: 100%; padding: 8px 12px; border: 0; background: none; border-radius: var(--ui-radius-sm); color: var(--ui-slate-700); font-size: 13px; font-weight: 500; text-align: left; white-space: nowrap; cursor: pointer; }
.dt-menu-item > i { width: 16px; text-align: center; color: var(--ui-slate-400); }
.dt-menu-item:hover, .dt-menu-item:focus { background: var(--ui-slate-100); color: var(--ui-slate-900); text-decoration: none; outline: 0; }
.dt-menu-item.is-danger, .dt-menu-item.is-danger > i { color: var(--ui-danger); }
.dt-menu-item.is-danger:hover { background: var(--ui-danger-50); color: #B91C1C; }
.dt-totals { display: flex; flex-wrap: wrap; gap: 8px 22px; justify-content: flex-end; align-items: baseline; padding: 12px 20px; background: var(--ui-slate-50); border-top: 1px solid var(--ui-border); font-size: 13px; color: var(--ui-muted); }
.dt-totals strong { color: var(--ui-slate-900); font-variant-numeric: tabular-nums; font-size: 14px; }
.dt-footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 20px; border-top: 1px solid var(--ui-border); font-size: 13px; color: var(--ui-muted); }
.dt-footer .pagination { margin: 0; }
.dt-card.is-loading .dt-table-wrap { opacity: .45; pointer-events: none; transition: opacity .15s; }

/* 13. Pagination ----------------------------------------------------------- */
body.app-ui .pagination { display: inline-flex; gap: 4px; margin: 0; }
body.app-ui .pagination > li > a,
body.app-ui .pagination > li > span {
    float: none; display: inline-flex; align-items: center; justify-content: center;
    min-width: 34px; height: 34px; padding: 0 10px; margin: 0;
    border: 1px solid var(--ui-border); border-radius: var(--ui-radius-sm) !important;
    background: var(--ui-surface); color: var(--ui-slate-600); font-weight: 600; font-size: 13px;
}
body.app-ui .pagination > li > a:hover { background: var(--ui-slate-100); color: var(--ui-slate-900); border-color: var(--ui-slate-300); }
body.app-ui .pagination > .active > span, body.app-ui .pagination > .active > a,
body.app-ui .pagination > .active > span:hover { background: var(--ui-primary); border-color: var(--ui-primary); color: #fff; }
body.app-ui .pagination > .disabled > span { color: var(--ui-slate-300); background: var(--ui-surface); }

/* Breadcrumb (theme) */
body.app-ui .breadcrumb { background: transparent; padding: 0; margin: 0; font-size: 12.5px; }

/* 14. Modals --------------------------------------------------------------- */
body.app-ui .modal-backdrop.in { opacity: .45; background: var(--ui-slate-900); }
body.app-ui .modal-content { border: 0; border-radius: 14px; box-shadow: 0 24px 60px rgba(15, 23, 42, .28); overflow: hidden; }
body.app-ui .modal-header { padding: 18px 22px; border-bottom: 1px solid var(--ui-border); }
body.app-ui .modal-title { font-size: 16px; font-weight: 700; color: var(--ui-slate-900); display: flex; align-items: center; gap: 10px; }
body.app-ui .modal-body { padding: 20px 22px; }
body.app-ui .modal-footer { padding: 14px 22px; background: var(--ui-slate-50); border-top: 1px solid var(--ui-border); display: flex; justify-content: flex-end; gap: 8px; }
body.app-ui .modal-footer .btn + .btn { margin-left: 0; }
body.app-ui .modal-header .close { margin-top: 0; opacity: .4; font-size: 24px; }
.modal-icon { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 50%; font-size: 15px; background: var(--ui-primary-50); color: var(--ui-primary); flex: 0 0 34px; }
.modal-icon--danger { background: var(--ui-danger-50); color: var(--ui-danger); }
.modal-icon--warning { background: var(--ui-warning-50); color: var(--ui-warning); }
.modal-icon--success { background: var(--ui-success-50); color: var(--ui-success); }
.confirm-message { margin: 0 0 14px; color: var(--ui-slate-700); }
.confirm-details { background: var(--ui-slate-50); border: 1px solid var(--ui-border); border-radius: var(--ui-radius); padding: 4px 14px; }
.confirm-details:empty { display: none; }

/* 15. Empty / loading states ------------------------------------------------ */
.empty-state { text-align: center; padding: 44px 20px; color: var(--ui-muted); }
.empty-state-icon { display: inline-flex; align-items: center; justify-content: center; width: 56px; height: 56px; border-radius: 50%; background: var(--ui-slate-100); color: var(--ui-slate-400); font-size: 22px; margin-bottom: 12px; }
.empty-state-title { font-size: 15px; font-weight: 700; color: var(--ui-slate-800); margin: 0 0 4px; }
.empty-state-text { font-size: 13px; margin: 0 auto; max-width: 380px; }
.empty-state .btn { margin-top: 14px; }
body.app-ui .dt-table > tbody > tr.dt-empty-row > td { padding: 0; white-space: normal; border-top: 0; }
body.app-ui .dt-table > tbody > tr.dt-empty-row:hover { background: transparent; }
.ui-spinner { display: inline-block; width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--ui-slate-200); border-top-color: var(--ui-primary); animation: ui-spin .7s linear infinite; vertical-align: middle; }
.ui-loading-block { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 30px; color: var(--ui-muted); }
@keyframes ui-spin { to { transform: rotate(360deg); } }

/* 16. Auth pages (layouts/app: login, register, forgot/reset) ---------------- */
body.app-ui.auth-page { background: radial-gradient(1200px 600px at 10% -10%, #E0E7FF 0%, transparent 60%), radial-gradient(900px 500px at 110% 110%, #EDE9FE 0%, transparent 55%), var(--ui-bg); min-height: 100vh; }
body.app-ui .sign-in-wrapper { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 40px 16px; background: transparent; }
body.app-ui .sign-container {
    width: 100%; max-width: 420px; margin: 0;
    background: var(--ui-surface);
    border: 1px solid var(--ui-border);
    border-radius: 16px;
    box-shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 18px 48px rgba(15, 23, 42, .10);
    padding: 34px 32px 28px;
}
body.app-ui .sign-container.sign-container--wide { max-width: 760px; }
body.app-ui .sign-container .logo { margin: 0 0 14px; }
body.app-ui .sign-container .logo img { max-height: 44px; width: auto; }
body.app-ui .sign-container h4 { font-size: 20px; font-weight: 700; color: var(--ui-slate-900); margin: 4px 0 4px; }
body.app-ui .sign-container .company-name { margin: 0; font-size: 13px; font-weight: 600; color: var(--ui-muted); }
body.app-ui .sign-container .auth-subtitle { color: var(--ui-muted); font-size: 13.5px; margin: 0 0 22px; }
body.app-ui .sign-container .sign-in-form { margin-top: 22px; }
body.app-ui .sign-container .btn-info, body.app-ui .sign-container .btn-primary { background: var(--ui-primary); border-color: var(--ui-primary); color: #fff; height: 44px; font-size: 14.5px; }
body.app-ui .sign-container .btn-info:hover, body.app-ui .sign-container .btn-info:focus { background: var(--ui-primary-600); border-color: var(--ui-primary-600); }
body.app-ui .sign-container .btn-default.btn-block { height: 42px; line-height: 24px; }
body.app-ui .sign-container .form-control { height: 44px; }
body.app-ui .sign-container .help-block a { font-weight: 600; }
body.app-ui .sign-container .copyright-txt { margin-top: 22px; color: var(--ui-slate-400); }
body.app-ui .i-checks > i { border-radius: 4px; }

/* 17. Binary tree ------------------------------------------------------------ */
.bt-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; justify-content: space-between; margin-bottom: 14px; }
.bt-search { position: relative; flex: 1 1 280px; max-width: 420px; }
.bt-search > .fa { position: absolute; left: 13px; top: 13px; color: var(--ui-slate-400); pointer-events: none; }
body.app-ui .bt-search .form-control { padding-left: 36px; }
.bt-search-results { position: absolute; top: 100%; left: 0; right: 0; z-index: 1000; margin-top: 4px; background: var(--ui-surface); border: 1px solid var(--ui-border); border-radius: var(--ui-radius); box-shadow: var(--ui-shadow-lg); max-height: 260px; overflow-y: auto; padding: 4px; }
.bt-search-results a { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: var(--ui-radius-sm); color: var(--ui-slate-800); }
.bt-search-results a:hover, .bt-search-results a:focus { background: var(--ui-slate-100); text-decoration: none; }
.bt-search-results .bt-search-empty { padding: 8px 10px; color: var(--ui-muted); }
.bt-zoom { display: inline-flex; gap: 4px; }
.bt-legend { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 16px; font-size: 12.5px; color: var(--ui-slate-600); padding: 10px 14px; background: var(--ui-slate-50); border: 1px solid var(--ui-border); border-radius: var(--ui-radius); margin-bottom: 14px; }
.bt-legend-title { font-weight: 700; color: var(--ui-slate-700); margin-right: 4px; }
.bt-legend-item { display: inline-flex; align-items: center; gap: 6px; }
.bt-legend-swatch { width: 18px; height: 18px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-size: 9px; color: #fff; background: var(--pkg); }
.bt-legend-sep { width: 1px; height: 16px; background: var(--ui-border); }
.bt-legend-side { display: inline-flex; align-items: center; gap: 6px; }
.bt-legend-line { width: 18px; height: 3px; border-radius: 2px; }

.bt-viewport { overflow: auto; border: 1px solid var(--ui-border); border-radius: var(--ui-radius-lg); background: var(--ui-slate-50) radial-gradient(var(--ui-slate-200) 1px, transparent 1px); background-size: 18px 18px; padding: 28px 16px 36px; min-height: 320px; -webkit-overflow-scrolling: touch; }
.bt-canvas { display: inline-block; min-width: 100%; transform-origin: top center; transition: transform .2s ease; }

/* Classic nested-list org chart: every li draws half of the horizontal
   connector above it; ul::before draws the drop line from its parent. */
.bt-tree, .bt-tree ul { list-style: none; margin: 0; padding: 0; display: flex; justify-content: center; }
.bt-tree ul { position: relative; padding-top: 26px; }
.bt-tree li { position: relative; display: flex; flex-direction: column; align-items: center; padding: 26px 8px 0; }
.bt-tree > li { padding-top: 0; }
.bt-tree li::before, .bt-tree li::after { content: ""; position: absolute; top: 0; width: 50%; height: 26px; border-top: 2px solid var(--ui-slate-300); }
.bt-tree li::before { right: 50%; }
.bt-tree li::after { left: 50%; border-left: 2px solid var(--ui-slate-300); }
.bt-tree li:only-child::before, .bt-tree li:only-child::after { display: none; }
.bt-tree li:only-child { padding-top: 26px; }
.bt-tree li:only-child > .bt-node-wrap::before { content: ""; position: absolute; top: -26px; left: 50%; height: 26px; border-left: 2px solid var(--ui-slate-300); }
.bt-tree li:first-child::before, .bt-tree li:last-child::after { border: 0 none; }
.bt-tree li:last-child::before { border-right: 2px solid var(--ui-slate-300); border-radius: 0 8px 0 0; }
.bt-tree li:first-child::after { border-radius: 8px 0 0 0; }
.bt-tree > li::before, .bt-tree > li::after, .bt-tree > li > .bt-node-wrap::before { display: none; }
.bt-tree > li, .bt-tree > li:only-child { padding-top: 12px; }
.bt-tree ul::before { content: ""; position: absolute; top: 0; left: 50%; height: 26px; border-left: 2px solid var(--ui-slate-300); }
/* Colour the connector by leg: left = blue, right = purple */
.bt-tree li.bt-left::after, .bt-tree li.bt-left:last-child::before { border-color: var(--ui-left); }
.bt-tree li.bt-left::before { border-color: var(--ui-left); }
.bt-tree li.bt-right::before, .bt-tree li.bt-right:first-child::after { border-color: var(--ui-right); }
.bt-tree li.bt-right::after { border-color: var(--ui-right); }
.bt-tree li.bt-collapsed > ul { display: none; }

.bt-node-wrap { position: relative; display: flex; flex-direction: column; align-items: center; }
.bt-node {
    --pkg: var(--ui-slate-400);
    position: relative;
    width: 150px;
    padding: 14px 10px 12px;
    background: var(--ui-surface);
    border: 1px solid var(--ui-border);
    border-top: 3px solid var(--pkg);
    border-radius: var(--ui-radius-lg);
    box-shadow: var(--ui-shadow);
    text-align: center;
    cursor: pointer;
    transition: box-shadow .15s ease, transform .15s ease;
    outline: 0;
}
.bt-node:hover, .bt-node:focus { box-shadow: var(--ui-shadow-lg); transform: translateY(-2px); }
.bt-node:focus { box-shadow: var(--ui-shadow-lg), var(--ui-ring); }
.bt-node.is-anchor { border-color: var(--ui-primary-100); border-top-color: var(--pkg); box-shadow: 0 0 0 3px rgba(79, 70, 229, .14), var(--ui-shadow); }
.bt-node.is-inactive { background: #FCFCFD; }
.bt-avatar { background: #fff; position: relative; width: 48px; height: 48px; margin: 0 auto 8px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 22px; color: var(--pkg); background: color-mix(in srgb, var(--pkg) 12%, #fff); border: 2px solid var(--pkg); }
.bt-status-dot { position: absolute; right: -1px; bottom: 1px; width: 12px; height: 12px; border-radius: 50%; border: 2px solid #fff; background: var(--ui-success); }
.bt-node.is-inactive .bt-status-dot { background: var(--ui-slate-400); }
.bt-username { font-weight: 700; font-size: 13.5px; color: var(--ui-slate-900); line-height: 1.3; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bt-name { font-size: 12px; color: var(--ui-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin-bottom: 6px; }
.bt-package { display: inline-block; max-width: 100%; padding: 1px 9px; border-radius: 999px; font-size: 11px; font-weight: 700; color: var(--pkg); background: color-mix(in srgb, var(--pkg) 11%, #fff); border: 1px solid color-mix(in srgb, var(--pkg) 28%, #fff); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bt-side { position: absolute; top: -11px; left: 50%; transform: translateX(-50%); font-size: 10px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; padding: 1px 8px; border-radius: 999px; color: #fff; }
.bt-side--left { background: var(--ui-left); }
.bt-side--right { background: var(--ui-right); }
.bt-side--root { background: var(--ui-slate-700); }
.bt-open { position: absolute; top: 8px; right: 8px; width: 24px; height: 24px; font-size: 11px; }
.bt-toggle { margin-top: 8px; width: 22px; height: 22px; border-radius: 50%; border: 1px solid var(--ui-slate-300); background: var(--ui-surface); color: var(--ui-slate-600); font-size: 10px; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; padding: 0; position: relative; z-index: 1; }
.bt-toggle:hover { border-color: var(--ui-primary); color: var(--ui-primary); }
.bt-empty {
    width: 150px; padding: 18px 10px;
    border: 2px dashed var(--ui-slate-300);
    border-radius: var(--ui-radius-lg);
    background: rgba(255, 255, 255, .6);
    text-align: center;
    color: var(--ui-slate-400);
}
.bt-empty-icon { width: 34px; height: 34px; margin: 0 auto 6px; border-radius: 50%; border: 2px dashed var(--ui-slate-300); display: flex; align-items: center; justify-content: center; font-size: 13px; }
.bt-empty-title { font-size: 12.5px; font-weight: 700; color: var(--ui-slate-500); }
.bt-empty-side { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; }
.bt-empty--left .bt-empty-side { color: var(--ui-left); }
.bt-empty--right .bt-empty-side { color: var(--ui-right); }

/* Tree details modal */
.bt-profile { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.bt-profile .bt-avatar { margin: 0; flex: 0 0 56px; width: 56px; height: 56px; font-size: 26px; }
.bt-profile-name { font-size: 16px; font-weight: 700; color: var(--ui-slate-900); }
.bt-profile-sub { color: var(--ui-muted); font-size: 13px; }

/* Genealogy view switch + Level (sponsor) tree ------------------------------ */
.gv-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 14px; }
.gv-mode { font-size: 12.5px; font-weight: 600; color: var(--ui-slate-600); display: inline-flex; align-items: center; gap: 8px; }
.gv-mode .label { font-size: 12px; padding: 4px 10px; }
.gv-summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; margin-bottom: 12px; }
.gv-summary-item { background: var(--ui-surface); border: 1px solid var(--ui-border); border-radius: var(--ui-radius); padding: 10px 14px; }
.gv-summary-item span { display: block; font-size: 11.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--ui-muted); }
.gv-summary-item strong { font-size: 18px; color: var(--ui-slate-900); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: block; }
.gv-levels { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.gv-level-chip { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; border-radius: 999px; border: 1px solid var(--ui-border); background: var(--ui-surface); color: var(--ui-slate-700); font-weight: 600; font-size: 12.5px; }
.gv-level-chip small { color: var(--ui-muted); font-weight: 700; }
.gv-level-chip:hover, .gv-level-chip:focus { text-decoration: none; border-color: var(--ui-primary); color: var(--ui-primary); }
.gv-level-chip.is-active { background: var(--ui-primary); border-color: var(--ui-primary); color: #fff; }
.gv-level-chip.is-active small { color: rgba(255, 255, 255, .8); }
.gv-level-title { font-size: 16px; margin: 0 0 12px; }

.lt-viewport { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.lt-tree, .lt-children { list-style: none; margin: 0; padding: 0; }
.lt-children { position: relative; margin-left: 17px; padding-left: 22px; border-left: 2px solid var(--ui-slate-200); }
.lt-item { position: relative; padding-top: 8px; }
.lt-children > .lt-item::before { content: ""; position: absolute; left: -22px; top: 30px; width: 20px; border-top: 2px solid var(--ui-slate-200); }
.lt-item.lt-collapsed > .lt-children { display: none; }
.lt-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; min-width: 280px; padding: 8px 12px; background: var(--ui-surface); border: 1px solid var(--ui-border); border-left: 3px solid var(--pkg); border-radius: var(--ui-radius); box-shadow: var(--ui-shadow-sm, 0 1px 2px rgba(15, 23, 42, .05)); }
.lt-row.is-anchor { border-color: var(--ui-primary-100); border-left-color: var(--pkg); box-shadow: 0 0 0 3px rgba(79, 70, 229, .12); }
.lt-row.is-focus { background: #FFFBEB; border-color: #F59E0B; box-shadow: 0 0 0 3px rgba(245, 158, 11, .25); }
.lt-row.is-inactive { background: #FCFCFD; }
.lt-toggle { flex: 0 0 auto; display: inline-flex; align-items: center; gap: 4px; height: 26px; min-width: 26px; padding: 0 8px; border-radius: 999px; border: 1px solid var(--ui-slate-300); background: var(--ui-surface); color: var(--ui-slate-600); font-size: 11px; font-weight: 700; cursor: pointer; }
.lt-toggle:hover { border-color: var(--ui-primary); color: var(--ui-primary); }
.lt-toggle--leaf { border-style: dashed; cursor: default; padding: 0; width: 26px; }
.lt-toggle--leaf:hover { border-color: var(--ui-slate-300); }
.lt-avatar { flex: 0 0 36px; width: 36px; height: 36px; margin: 0; font-size: 16px; }
.lt-avatar .bt-status-dot { width: 10px; height: 10px; }
.lt-row.is-inactive .bt-status-dot { background: var(--ui-slate-400); }
.lt-main { flex: 1 1 140px; min-width: 0; cursor: pointer; }
.lt-main:focus { outline: none; box-shadow: var(--ui-ring); border-radius: 4px; }
.lt-username { display: block; font-weight: 700; color: var(--ui-slate-900); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lt-name { display: block; font-size: 12px; color: var(--ui-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lt-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.lt-meta { font-size: 12px; color: var(--ui-muted); }
.lt-open { flex: 0 0 auto; width: 28px; height: 28px; font-size: 12px; }
.lt-more { padding-top: 8px; }
@media (max-width: 600px) {
    .lt-children { margin-left: 8px; padding-left: 12px; }
    .lt-children > .lt-item::before { left: -12px; width: 10px; }
    .lt-tags .lt-meta { display: none; }
}

/* 18. Utilities / responsive ------------------------------------------------ */
.d-block { display: block; }
.gap-8 { gap: 8px; }
.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.mb-0 { margin-bottom: 0 !important; }
.mt-0 { margin-top: 0 !important; }

@media (max-width: 1199px) {
    .stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .stat-grid.stat-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 767px) {
    body.app-ui .ui-content-body { padding: 16px 12px 28px; }
    .stat-grid, .stat-grid.stat-grid--3 { grid-template-columns: 1fr; gap: 12px; }
    body.app-ui .page-header-ui { align-items: flex-start; }
    body.app-ui .page-header-ui .page-actions { width: 100%; }
    body.app-ui .page-header-ui h1.page-title { font-size: 19px; }
    .dt-head, .dt-toolbar, .dt-footer, .dt-totals { padding-left: 14px; padding-right: 14px; }
    .dt-filters { margin-left: 14px; margin-right: 14px; }
    .dt-search { max-width: none; flex-basis: 100%; }
    .dt-toolbar-spacer { display: none; }
    .dt-footer { justify-content: center; }
    body.app-ui .dt-table > thead > tr > th:first-child, body.app-ui .dt-table > tbody > tr > td:first-child { padding-left: 14px; }
    body.app-ui .panel > .panel-body { padding: 16px; }
    body.app-ui .sign-container { padding: 26px 20px 22px; }
    .form-actions { justify-content: stretch; }
    .form-actions .btn { flex: 1 1 auto; }
    .detail-list { grid-template-columns: 1fr; }
    .detail-list > dt { border-bottom: 0; padding-bottom: 0; }
}
@media print {
    body.app-ui { background: #fff; }
    .dt-toolbar, .dt-filters, .dt-actions-col, .dt-footer .pagination, .page-actions { display: none !important; }
    .dt-card, body.app-ui .panel { box-shadow: none; }
}