/* Sam House — giao diện quản trị. Mobile-first, chạm dễ (≥44px), màu dịu mắt. */
:root{
  --brand:#0f766e;--brand-600:#0d9488;--brand-50:#f0fdfa;--brand-100:#ccfbf1;
  --accent:#f59e0b;--ink:#0f172a;--text:#334155;--muted:#64748b;--line:#e2e8f0;--bg:#f4f6f8;--card:#fff;
  --side:#0b3b3a;--side-ink:#cde7e4;--danger:#dc2626;--ok:#16a34a;--warn:#d97706;
  --r:12px;--shadow:0 1px 2px rgba(15,23,42,.05),0 2px 8px rgba(15,23,42,.04);
  --font:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);font-size:15px;color:var(--text);background:var(--bg);line-height:1.5}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3,h4{color:var(--ink);margin:0 0 .5em;line-height:1.3}
h2{font-size:1.15rem}h3{font-size:1rem}
.ic{flex-shrink:0;vertical-align:middle}
.muted{color:var(--muted)}.small{font-size:.85em}.nowrap{white-space:nowrap}.right{text-align:right}.center{text-align:center}
.mt{margin-top:16px}.mb{margin-bottom:16px}.mb0{margin-bottom:0}.gap{gap:8px}.w100{width:100%}
.flex{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.between{justify-content:space-between}.grow{flex:1}
.hide{display:none!important}

/* ---------- Layout ---------- */
.sidebar{position:fixed;inset:0 auto 0 0;width:256px;background:var(--side);color:var(--side-ink);display:flex;flex-direction:column;z-index:40;transition:transform .25s}
.zone-platform .sidebar{background:#1e1b4b}
.brand{display:flex;gap:10px;align-items:center;padding:18px 16px;border-bottom:1px solid rgba(255,255,255,.08)}
.logo{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,#14b8a6,#f59e0b);display:grid;place-items:center;color:#fff}
.brand-name{color:#fff;font-weight:700;font-size:15px;line-height:1.2}
.brand-sub{font-size:12px;opacity:.7}
.nav{overflow-y:auto;padding:8px 10px 24px;flex:1}
.nav-group{font-size:11px;text-transform:uppercase;letter-spacing:.06em;opacity:.55;margin:16px 10px 6px}
.nav a{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px;color:var(--side-ink);font-weight:500;font-size:14px;min-height:42px}
.nav a:hover{background:rgba(255,255,255,.07);text-decoration:none}
.nav a.active{background:rgba(20,184,166,.22);color:#fff}
.zone-platform .nav a.active{background:rgba(129,140,248,.3)}
.main{margin-left:256px;min-height:100vh;display:flex;flex-direction:column}
.topbar{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px;padding:10px 24px;min-height:62px}
.page-title{font-size:1.15rem;margin:0;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.global-search{display:flex;align-items:center;gap:8px;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:0 14px;width:340px;color:var(--muted)}
.global-search input{border:0;background:transparent;outline:0;height:40px;flex:1;font:inherit}
.content{padding:24px;flex:1;max-width:1480px;width:100%}
.overlay{display:none}
.icon-btn{border:0;background:transparent;padding:8px;border-radius:10px;cursor:pointer;color:var(--ink)}
.user-menu{position:relative}
.avatar-btn{display:flex;align-items:center;gap:8px;border:0;background:transparent;cursor:pointer;font:inherit;color:var(--ink);padding:4px;border-radius:999px}
.avatar{width:36px;height:36px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700}
.dropdown{display:none;position:absolute;right:0;top:calc(100% + 6px);background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,.12);min-width:220px;padding:6px;z-index:50}
.dropdown.open{display:block}
.dropdown a,.dropdown button{display:flex;gap:8px;align-items:center;width:100%;padding:10px 12px;border:0;background:none;font:inherit;color:var(--text);border-radius:8px;cursor:pointer;text-align:left}
.dropdown a:hover,.dropdown button:hover{background:var(--bg);text-decoration:none}
.dd-head{padding:8px 12px;border-bottom:1px solid var(--line);margin-bottom:4px;display:flex;flex-direction:column}
.impersonate-bar{background:#fef3c7;color:#92400e;padding:8px 24px;display:flex;gap:12px;align-items:center;justify-content:space-between;font-size:14px}
.bottom-nav{display:none}

/* ---------- Cards / grid ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:20px;margin-bottom:20px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.card-head h2,.card-head h3{margin:0}
.card.p0{padding:0}.card.p0 .card-head{padding:16px 20px 0}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(3,minmax(0,1fr))}.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.g-main{grid-template-columns:minmax(0,2fr) minmax(0,1fr)}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;box-shadow:var(--shadow);display:flex;gap:14px;align-items:center}
.kpi .k-ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;flex-shrink:0}
.kpi .k-label{font-size:13px;color:var(--muted)}
.kpi>div:last-child{min-width:0}
.kpi .k-val{font-size:clamp(1.15rem,1.6vw,1.45rem);font-weight:700;color:var(--ink);line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.kpi .k-sub{font-size:12px;color:var(--muted)}
.up{color:var(--ok)}.down{color:var(--danger)}
.bg-teal{background:#ccfbf1;color:#0f766e}.bg-amber{background:#fef3c7;color:#b45309}.bg-blue{background:#dbeafe;color:#1d4ed8}
.bg-violet{background:#ede9fe;color:#6d28d9}.bg-rose{background:#ffe4e6;color:#be123c}.bg-green{background:#dcfce7;color:#15803d}
.chart-box{position:relative;height:280px}

/* ---------- Buttons / forms ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:42px;padding:0 16px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--ink);font:inherit;font-weight:600;font-size:14px;cursor:pointer;white-space:nowrap;text-decoration:none!important}
.btn:hover{background:var(--bg)}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff}.btn-primary:hover{background:#115e59}
.btn-accent{background:var(--accent);border-color:var(--accent);color:#fff}.btn-accent:hover{background:#d97706}
.btn-danger{background:#fff;color:var(--danger);border-color:#fecaca}.btn-danger:hover{background:#fef2f2}
.btn-ghost{border-color:transparent;background:transparent}
.btn-sm{min-height:34px;padding:0 10px;font-size:13px;border-radius:8px}
.btn-block{width:100%}
.btn-zalo{background:#0068ff;border-color:#0068ff;color:#fff}.btn-zalo:hover{background:#0056d6}
form.inline{display:inline}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 18px}
.form-grid .full{grid-column:1/-1}
.field label{display:block;font-weight:600;font-size:13.5px;color:var(--ink);margin-bottom:6px}
.field .req{color:var(--danger)}
.field .help{font-size:12.5px;color:var(--muted);margin-top:4px}
.input,select.input,textarea.input{width:100%;min-height:44px;padding:9px 12px;border:1px solid #cbd5e1;border-radius:10px;font:inherit;color:var(--ink);background:#fff;transition:border .15s,box-shadow .15s}
textarea.input{min-height:90px;resize:vertical}
.input:focus{outline:0;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(13,148,136,.15)}
.form-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:20px;flex-wrap:wrap}
.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.filters .input{width:auto;min-width:160px;flex:0 1 auto}
.filters .search{flex:1 1 240px}
.check{display:flex;align-items:center;gap:8px;min-height:36px;cursor:pointer}
.check input{width:18px;height:18px;accent-color:var(--brand)}
fieldset{border:1px solid var(--line);border-radius:10px;padding:14px;margin:0 0 14px}
legend{font-weight:600;padding:0 6px;color:var(--ink)}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.table{width:100%;border-collapse:collapse;font-size:14px}
.table th{text-align:left;font-weight:600;color:var(--muted);font-size:12.5px;text-transform:uppercase;letter-spacing:.03em;padding:10px 12px;border-bottom:1px solid var(--line);background:#f8fafc;white-space:nowrap}
.table td{padding:11px 12px;border-bottom:1px solid #f1f5f9;vertical-align:middle}
.table tr:hover td{background:#fafcfc}
.table .actions{white-space:nowrap;text-align:right}
.table tfoot td{font-weight:700;background:#f8fafc}
.empty{text-align:center;padding:40px 16px;color:var(--muted)}
.empty .ic{width:44px;height:44px;opacity:.4;margin-bottom:8px}
.pager{display:flex;gap:4px;align-items:center;flex-wrap:wrap;margin-top:16px}
.pager a,.pager span.cur{min-width:36px;height:36px;display:grid;place-items:center;border-radius:8px;border:1px solid var(--line);background:#fff;color:var(--ink);padding:0 8px}
.pager span.cur{background:var(--brand);color:#fff;border-color:var(--brand)}
.pager .muted{margin-left:8px}

/* ---------- Badges / alerts ---------- */
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;white-space:nowrap}
.badge-blue{background:#dbeafe;color:#1e40af}.badge-cyan{background:#cffafe;color:#155e75}.badge-indigo{background:#e0e7ff;color:#3730a3}
.badge-amber{background:#fef3c7;color:#92400e}.badge-violet{background:#ede9fe;color:#5b21b6}.badge-orange{background:#ffedd5;color:#9a3412}
.badge-green{background:#dcfce7;color:#166534}.badge-gray{background:#f1f5f9;color:#475569}.badge-red{background:#fee2e2;color:#991b1b}
.badge-teal{background:#ccfbf1;color:#115e59}.badge-pink{background:#fce7f3;color:#9d174d}
.alert{padding:12px 44px 12px 16px;border-radius:10px;margin-bottom:16px;position:relative;border:1px solid}
.alert-success{background:#f0fdf4;border-color:#bbf7d0;color:#166534}
.alert-error{background:#fef2f2;border-color:#fecaca;color:#991b1b}
.alert-warning{background:#fffbeb;border-color:#fde68a;color:#92400e}
.alert-info{background:#eff6ff;border-color:#bfdbfe;color:#1e40af}
.alert-x{position:absolute;right:8px;top:6px;border:0;background:none;font-size:22px;cursor:pointer;color:inherit;opacity:.6}

/* ---------- Misc components ---------- */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:16px;overflow-x:auto}
.tabs a{padding:10px 14px;border-bottom:2px solid transparent;color:var(--muted);font-weight:600;white-space:nowrap}
.tabs a.active{color:var(--brand);border-color:var(--brand)}.tabs a:hover{text-decoration:none;color:var(--ink)}
.kv{display:grid;grid-template-columns:140px 1fr;gap:8px 12px;font-size:14px}
.kv dt{color:var(--muted)}.kv dd{margin:0;color:var(--ink);font-weight:500}
.timeline{list-style:none;margin:0;padding:0}
.timeline li{position:relative;padding:0 0 16px 28px;border-left:2px solid var(--line);margin-left:8px}
.timeline li:last-child{border-color:transparent}
.timeline li::before{content:"";position:absolute;left:-7px;top:3px;width:12px;height:12px;border-radius:50%;background:#fff;border:2px solid var(--brand)}
.timeline .t-meta{font-size:12.5px;color:var(--muted)}
.kanban{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(250px,1fr);gap:12px;overflow-x:auto;padding-bottom:8px}
.kcol{background:#eef2f5;border-radius:12px;padding:10px;min-height:200px}
.kcol h4{display:flex;justify-content:space-between;font-size:13px;margin:4px 4px 10px}
.kcard{background:#fff;border-radius:10px;padding:10px 12px;margin-bottom:8px;border:1px solid var(--line);box-shadow:var(--shadow);font-size:13.5px;display:block;color:var(--text)}
.kcard:hover{border-color:var(--brand-600);text-decoration:none}
.kcard b{color:var(--ink)}
.funnel-row{display:flex;align-items:center;gap:10px;margin:6px 0}
.funnel-row .bar{height:28px;border-radius:6px;background:linear-gradient(90deg,#14b8a6,#0f766e);color:#fff;font-size:12.5px;display:flex;align-items:center;padding:0 8px;min-width:32px;font-weight:600}
.funnel-row .lbl{width:120px;font-size:13px;color:var(--muted);flex-shrink:0}
.progress{height:8px;border-radius:99px;background:#e2e8f0;overflow:hidden}
.progress > i{display:block;height:100%;background:var(--brand-600);border-radius:99px}
.att-row{display:flex;align-items:center;gap:10px;padding:12px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.att-row .who{flex:1 1 200px}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;flex-wrap:wrap}
.seg label{cursor:pointer}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:block;padding:9px 12px;font-size:13px;font-weight:600;border-right:1px solid var(--line);min-width:44px;text-align:center}
.seg label:last-child span{border-right:0}
.seg input:checked + span.s-present{background:#16a34a;color:#fff}
.seg input:checked + span.s-late{background:#d97706;color:#fff}
.seg input:checked + span.s-excused{background:#2563eb;color:#fff}
.seg input:checked + span.s-absent{background:#dc2626;color:#fff}
.seg input:checked + span.s-makeup{background:#7c3aed;color:#fff}
.chat{display:flex;flex-direction:column;gap:8px;max-height:460px;overflow-y:auto;padding:12px;background:#f8fafc;border-radius:10px}
.msg{max-width:78%;padding:9px 12px;border-radius:14px;font-size:14px;white-space:pre-wrap;word-wrap:break-word}
.msg.out{align-self:flex-end;background:#0068ff;color:#fff;border-bottom-right-radius:4px}
.msg.in{align-self:flex-start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px}
.msg small{display:block;opacity:.75;font-size:11px;margin-top:3px}
.list-plain{list-style:none;margin:0;padding:0}
.list-plain li{padding:10px 0;border-bottom:1px solid #f1f5f9;display:flex;gap:10px;align-items:center;justify-content:space-between}
.list-plain li:last-child{border:0}
.session-card{border-left:4px solid var(--brand-600);background:#fff;border-radius:10px;padding:12px 14px;border:1px solid var(--line);border-left-width:4px;margin-bottom:10px}
.cal-week{display:grid;grid-template-columns:repeat(7,minmax(130px,1fr));gap:8px;overflow-x:auto}
.cal-day{background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px;min-height:140px}
.cal-day.today{border-color:var(--brand-600);box-shadow:0 0 0 2px var(--brand-100)}
.cal-day h4{font-size:12.5px;margin:0 0 6px;color:var(--muted)}
.cal-ev{display:block;font-size:12px;background:var(--brand-50);border-left:3px solid var(--brand-600);padding:5px 7px;border-radius:6px;margin-bottom:5px;color:var(--ink)}
.cal-ev:hover{text-decoration:none;background:var(--brand-100)}
.stepper{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}
.stepper span{padding:6px 12px;border-radius:999px;background:#e2e8f0;font-size:13px;font-weight:600;color:var(--muted)}
.stepper span.on{background:var(--brand);color:#fff}
.price-line{display:flex;justify-content:space-between;padding:6px 0}
.price-line.total{font-size:1.2rem;font-weight:700;color:var(--ink);border-top:2px solid var(--line);margin-top:6px;padding-top:10px}
.code{font-family:ui-monospace,Consolas,monospace;background:#f1f5f9;padding:10px 12px;border-radius:8px;font-size:12.5px;white-space:pre-wrap;word-break:break-all}

/* ---------- Trình thiết kế form (Marketing) ---------- */
.fb-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:10px 14px;position:sticky;top:62px;z-index:20;margin-bottom:16px}
.fb-name{width:auto;flex:1 1 200px;min-width:0;max-width:380px;font-weight:600}
.fb{display:grid;grid-template-columns:250px minmax(0,1fr) 320px;grid-template-areas:'pal canvas side';gap:20px;align-items:start}
.fb-palette{grid-area:pal;position:sticky;top:var(--fbtop,140px);max-height:calc(100vh - var(--fbtop,140px) - 16px);overflow-y:auto;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:12px}
.fb-pal-group h4{font-size:12.5px;margin:6px 4px 8px;text-transform:uppercase;letter-spacing:.03em}
.fb-pal-group h4 .muted{text-transform:none;letter-spacing:0;font-weight:400}
.fb-pal{display:flex;align-items:center;gap:8px;width:100%;padding:8px 10px;margin-bottom:4px;border:1px dashed #cbd5e1;border-radius:8px;background:#fff;font:inherit;font-size:13px;color:var(--ink);cursor:grab;text-align:left}
.fb-pal:hover{border-color:var(--brand-600);background:var(--brand-50)}
.fb-pal-lead{border-style:solid;border-color:#99f6e4;background:#f0fdfa}
.fb-pal.used{opacity:.45;cursor:not-allowed}
.fb-tip{margin:10px 4px 0}
.fb-canvas{grid-area:canvas;--c:var(--brand);background:color-mix(in srgb,var(--c) 8%,#f6f8fa);border-radius:var(--r);padding:16px;min-height:60vh}
.fb-head{background:#fff;border:1px solid var(--line);border-top:10px solid var(--c);border-radius:12px;padding:16px 18px;margin-bottom:12px}
.fb-title{width:100%;border:0;border-bottom:1px solid transparent;font:inherit;font-size:1.45rem;font-weight:700;color:var(--ink);padding:4px 0;background:transparent}
.fb-desc{width:100%;border:0;border-bottom:1px solid transparent;font:inherit;color:var(--text);resize:vertical;padding:6px 0;background:transparent}
.fb-title:focus,.fb-desc:focus{outline:0;border-color:var(--c)}
.fb-list{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}
.fb-list > *{grid-column:1/-1}
.fb-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:8px 14px 14px;margin-bottom:10px;cursor:pointer;position:relative;transition:box-shadow .15s}
.fb-card.half:not(.sel){grid-column:auto}
.fb-card:hover{box-shadow:0 2px 10px rgba(15,23,42,.08)}
.fb-card.sel{border-left:5px solid var(--c);box-shadow:0 4px 18px rgba(15,23,42,.1);cursor:default}
.fb-card.dragging{opacity:.35}
.fb-card.static{background:transparent;border-style:dashed}
.fb-card-top{display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-bottom:4px}
.fb-card-top .btn{min-height:30px;padding:0 6px;color:var(--muted)}
.fb-card-top .btn:hover{color:var(--ink)}
.fb-handle{cursor:grab;font-size:18px;line-height:1;padding:4px 6px;border-radius:6px;user-select:none;color:#94a3b8}
.fb-handle:hover{background:var(--bg);color:var(--ink)}
.fb-type{display:inline-flex;align-items:center;gap:4px}
.fb-q{font-weight:600;color:var(--ink)}.fb-q .req{color:var(--danger)}
.fb-help{font-size:12.5px;color:var(--muted);white-space:pre-line}
.fb-fake{border-bottom:1.5px solid var(--line);color:#94a3b8;padding:8px 2px;margin-top:6px;font-size:14px}
.fb-fake.fb-area{border:1.5px solid var(--line);border-radius:8px;min-height:60px;padding:8px}
.fb-fake.fb-select{border:1.5px solid var(--line);border-radius:8px;padding:8px 10px;max-width:320px}
.fb-opt{display:flex;gap:10px;align-items:center;padding:4px 0;font-size:14px}
.fb-opt span{color:#94a3b8}
.fb-line{flex:1;border-bottom:1px solid var(--line);height:1px;max-width:220px}
.fb-sec{background:var(--c);color:#fff;border-radius:10px;padding:10px 14px;font-weight:700}
.fb-para{white-space:pre-line;font-size:14px}
.fb-ed{border-top:1px solid var(--line);margin-top:12px;padding-top:12px;cursor:auto}
.fb-drop{height:4px;border-radius:4px;background:var(--c);margin:2px 0 8px;box-shadow:0 0 0 3px color-mix(in srgb,var(--c) 25%,transparent)}
.fb-end{text-align:center;padding:14px;border:2px dashed #cbd5e1;border-radius:12px}
.fb-side{grid-area:side;position:sticky;top:var(--fbtop,140px);max-height:calc(100vh - var(--fbtop,140px) - 16px);overflow-y:auto}
.fb-side .card{padding:16px}
.fb-side .code{font-size:11.5px;max-height:90px;overflow:auto}
.fb-side summary{cursor:pointer;margin-bottom:6px}
.tpl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.tpl{display:flex;flex-direction:column;gap:6px;text-align:left;border:1.5px solid var(--line);border-radius:12px;padding:16px;background:#fff;font:inherit;cursor:pointer;min-height:150px;color:var(--text)}
.tpl:hover{border-color:var(--brand-600);box-shadow:var(--shadow)}
.tpl b{color:var(--ink);font-size:15px}
.tpl .tpl-top{height:6px;border-radius:6px;background:linear-gradient(90deg,#14b8a6,#f59e0b);margin:-4px 0 6px}
.ans{display:grid;grid-template-columns:minmax(120px,38%) 1fr;gap:4px 12px;font-size:13px;margin:0}
.ans dt{color:var(--muted)}.ans dd{margin:0;color:var(--ink)}
@media (max-width:1280px){
  .fb{grid-template-columns:220px minmax(0,1fr);grid-template-areas:'pal canvas' 'pal side'}
  .fb-side{position:static;max-height:none;overflow:visible;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:0 20px}
}
@media (max-width:1024px){.fb-bar{top:56px}}
@media (max-width:860px){
  .fb{grid-template-columns:1fr;grid-template-areas:'pal' 'canvas' 'side'}
  .fb-palette{position:static;max-height:none;display:flex;gap:10px;overflow-x:auto;padding:10px}
  .fb-pal-group{display:flex;gap:6px;flex-shrink:0;align-items:center}
  .fb-pal-group h4,.fb-tip{display:none}
  .fb-pal{width:auto;white-space:nowrap;margin:0}
  .fb-list{grid-template-columns:1fr}.fb-card.half:not(.sel){grid-column:1/-1}
  .fb-canvas{padding:10px}
  .fb-side{display:block}
  .fb-bar{position:static}
}

/* ---------- Menu chính thu gọn (máy tính) ---------- */
.sidebar,.main{transition:width .2s,margin .2s,transform .25s}
@media (min-width:1025px){
  body.side-collapsed .sidebar{width:72px}
  body.side-collapsed .main{margin-left:72px}
  body.side-collapsed .brand{justify-content:center;padding:18px 0}
  body.side-collapsed .brand > div:last-child,body.side-collapsed .nav a span{display:none}
  body.side-collapsed .nav{padding:8px 10px 24px;scrollbar-width:none}
  body.side-collapsed .nav-group{height:1px;margin:12px 8px;background:rgba(255,255,255,.12);font-size:0}
  body.side-collapsed .nav a{justify-content:center;padding:10px 0}
}
@media (max-width:1024px){.hide-tablet{display:none!important}}

/* ---------- Auth pages ---------- */
.auth-wrap{min-height:100vh;display:grid;grid-template-columns:1.1fr 1fr}
.auth-hero{background:linear-gradient(150deg,#0b3b3a 0%,#0f766e 60%,#14b8a6 100%);color:#e6fffb;padding:56px;display:flex;flex-direction:column;justify-content:space-between}
.auth-hero.platform{background:linear-gradient(150deg,#1e1b4b,#4338ca)}
.auth-hero h1{color:#fff;font-size:2rem;margin-top:24px}
.auth-hero ul{padding-left:18px;line-height:2}
.auth-form{display:grid;place-items:center;padding:32px 20px;background:#fff}
.auth-box{width:100%;max-width:400px}
.auth-box h2{font-size:1.5rem}
.auth-box .field{margin-bottom:14px}

/* ---------- Responsive ---------- */
.only-mobile{display:none}
@media (max-width:1200px){.g4{grid-template-columns:repeat(2,minmax(0,1fr))}.global-search{width:240px}}
@media (max-width:1024px){
  .sidebar{transform:translateX(-100%);box-shadow:0 0 40px rgba(0,0,0,.3)}
  body.side-open .sidebar{transform:none}
  body.side-open .overlay{display:block;position:fixed;inset:0;background:rgba(15,23,42,.45);z-index:35}
  .main{margin-left:0}
  .only-mobile{display:inline-flex}
  .g3,.g-main{grid-template-columns:1fr}
}
@media (max-width:720px){
  body{font-size:15.5px}
  .hide-mobile{display:none!important}
  .topbar{padding:8px 12px;min-height:56px}
  .content{padding:14px 12px 90px}
  .g2,.g4,.form-grid{grid-template-columns:1fr}
  .g4.kpis{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .kpi{padding:12px;flex-direction:column;align-items:flex-start;gap:8px}
  .kpi .k-val{font-size:1.2rem;white-space:normal}
  .card{padding:14px;border-radius:12px;margin-bottom:14px}
  .filters .input{flex:1 1 140px;min-width:0}
  .kv{grid-template-columns:110px 1fr}
  .auth-wrap{grid-template-columns:1fr}.auth-hero{display:none}
  .bottom-nav{display:flex;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);z-index:30;padding-bottom:env(safe-area-inset-bottom)}
  .bottom-nav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 0;font-size:11px;color:var(--muted)}
  .bottom-nav a.active{color:var(--brand)}
  .bottom-nav a:hover{text-decoration:none}
  /* Bảng dạng thẻ trên điện thoại */
  table.table.responsive thead{display:none}
  table.table.responsive tr{display:block;border:1px solid var(--line);border-radius:10px;margin-bottom:10px;padding:6px 4px;background:#fff}
  table.table.responsive td{display:flex;justify-content:space-between;gap:12px;border:0;padding:6px 10px;text-align:right}
  table.table.responsive td::before{content:attr(data-label);color:var(--muted);font-size:12.5px;text-align:left;font-weight:500}
  table.table.responsive td.actions{justify-content:flex-end}
  table.table.responsive td.actions::before{content:none}
  .msg{max-width:90%}
}
@media print{
  .sidebar,.topbar,.bottom-nav,.no-print,.alert{display:none!important}
  .main{margin:0}.content{padding:0}.card{border:0;box-shadow:none}
  body{background:#fff}
}

/* ---------- Placement Tests (làm bài, xem đáp án, chấm lại, thư viện) ---------- */
.pt-wrap{max-width:860px;margin:0 auto;padding:16px 14px 80px}
.pt-head{background:linear-gradient(135deg,#0f766e,#14b8a6);color:#fff;border-radius:var(--r);padding:18px 20px;margin-bottom:16px}
.pt-head h1{color:#fff;font-size:1.4rem;margin:4px 0 8px}
.pt-meta{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:14px}
.pt-bar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:8px 12px;margin-bottom:12px;box-shadow:0 6px 18px rgba(15,23,42,.1)}
#pt-timer,#pt-listen{font-weight:700;background:var(--brand-50);color:var(--brand);padding:4px 12px;border-radius:99px;white-space:nowrap}
#pt-listen{background:#eef2ff;color:#3730a3}
#pt-timer.pt-late,#pt-listen.pt-late{background:#fef3c7;color:#92400e}
.pt-bar .btn{min-height:42px;padding:0 22px;font-size:16px}
.pt-confirm{width:min(480px,100%)}
.pt-stat{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:8px 0 12px}
.pt-stat>div{border-radius:12px;padding:12px;text-align:center;display:flex;flex-direction:column}
.pt-stat b{font-size:2.2rem;line-height:1.1}
.pt-stat-ok{background:#f0fdf4;color:#166534}.pt-stat-left{background:#fef2f2;color:#991b1b}
.pt-left-row{margin:4px 0}
.pt-jump{font:inherit;font-weight:700;min-width:34px;height:30px;margin:2px;border:1.5px solid #fca5a5;background:#fff;color:#991b1b;border-radius:8px;cursor:pointer}
.pt-flash{animation:ptflash 1.6s}
@keyframes ptflash{0%,60%{box-shadow:0 0 0 4px #fde68a}100%{box-shadow:none}}
.pt-audio-lock{font-weight:600;color:#92400e;background:#fef3c7;border-radius:8px;padding:6px 10px;margin-top:6px}
.pt-part{text-align:center;font-weight:800;letter-spacing:.08em;color:var(--brand);margin:24px 0 8px;font-size:1.1rem}
.pt-sec-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}
.pt-sec-head h3{font-size:1.05rem;margin:0}
.pt-pts{white-space:nowrap;color:var(--muted);font-size:14px}.pt-pts b{color:var(--brand)}
.pt-vi{color:var(--muted);font-style:italic;margin:2px 0 12px;font-size:14px}
.pt-audio{background:var(--brand-50);border:1px solid var(--brand-100);border-radius:10px;padding:10px 12px;margin-bottom:12px}
.pt-audio audio{width:100%}
.pt-box{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 22px;border:1.5px solid var(--line);border-radius:10px;padding:8px 12px;margin-bottom:12px}
.pt-box span{color:#16a34a;font-weight:600;font-style:italic}
.pt-figure{text-align:center;margin-bottom:12px}.pt-gallery{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.pt-gallery .pt-big{max-width:min(100%,320px)}
.pt-cont{margin-top:-8px;border-top-left-radius:0;border-top-right-radius:0}.pt-essay{width:100%;margin-top:6px;font-size:16px}
.pt-sample{background:#ecfdf5;border:1px solid #a7f3d0;border-radius:8px;padding:8px 10px;margin-top:6px;color:#065f46}.pt-explain{color:var(--muted);margin-top:4px}.pt-big{max-width:100%;border-radius:10px;border:1px solid var(--line)}
.pt-choices{display:grid;grid-template-columns:repeat(auto-fit,minmax(90px,1fr));gap:10px;margin-bottom:14px}
.pt-choices figure{margin:0;text-align:center;border:1px solid var(--line);border-radius:10px;padding:8px}
.pt-choices figcaption{font-weight:800;color:var(--brand);font-size:1.1rem}
.pt-img{display:block;width:96px;height:96px;object-fit:contain;margin:0 auto 8px}
.pt-items{display:grid;gap:10px}
.pt-items.pt-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,230px),1fr))}
.pt-item{position:relative;border:1px solid var(--line);border-radius:10px;padding:12px;background:#fff;min-width:0}
.pt-n{font-weight:700;color:var(--brand);margin-bottom:6px;font-size:14px}
.pt-q{color:var(--ink);font-size:16px;margin-bottom:8px;line-height:1.7}
.pt-opts{display:flex;flex-wrap:wrap;gap:8px}
.pt-opt{display:flex;align-items:center;gap:8px;border:1.5px solid var(--line);border-radius:10px;padding:8px 12px;min-height:46px;cursor:pointer;flex:1 1 auto;color:var(--ink)}
.pt-opt input{width:20px;height:20px;accent-color:var(--brand);flex-shrink:0}
.pt-opt:has(input:checked){border-color:var(--brand);background:var(--brand-50)}
.pt-opts-img .pt-opt{flex-direction:column;justify-content:center;flex:1 1 0;padding:8px 6px}
.pt-opt-img{width:72px;height:72px;object-fit:contain}.pt-opt-img.pt-opt-icon{width:34px;height:34px}
.pt-match .pt-item{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.pt-match .pt-n{margin:0}.pt-match .pt-q{margin:0;min-width:80px;font-weight:600}
.pt-match .pt-opt{flex:0 0 auto;min-width:46px;justify-content:center}
.pt-blank{border:0;border-bottom:2px dashed var(--brand);background:var(--brand-50);font:inherit;font-weight:600;color:var(--ink);padding:2px 8px;width:9em;max-width:100%;border-radius:4px 4px 0 0}
.pt-blank:focus{outline:2px solid var(--brand-100);border-bottom-style:solid}
.pt-word{font:inherit;border:1.5px solid var(--brand-100);background:#fff;border-radius:99px;padding:4px 14px;margin:0 6px 6px 0;cursor:pointer;color:var(--ink)}
.pt-word.used{opacity:.35;text-decoration:line-through}
.pt-order{display:flex;align-items:center;gap:8px}.pt-order .pt-sentence{flex:1;width:auto}
.pt-example{background:#f8fafc;border-style:dashed}
.pt-ok{border-color:#86efac;background:#f0fdf4}.pt-bad{border-color:#fca5a5;background:#fef2f2}
.pt-mark{float:right;font-size:18px}.pt-ok .pt-mark{color:var(--ok)}.pt-bad .pt-mark{color:var(--danger)}
.pt-opt.is-right{border-color:var(--ok);box-shadow:inset 0 0 0 1px var(--ok)}
.pt-right{color:var(--danger);margin-top:6px}.pt-regrade{margin-top:6px}
.pt-submit{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.pt-submit .btn{flex:1 1 200px;min-height:52px;font-size:17px;width:auto}
.pt-review .pt-sec{box-shadow:none;border:1px solid var(--line)}
.pt-score{display:flex;gap:24px;align-items:center;margin-bottom:12px}.pt-score>div:first-child{font-size:1.1rem}
.pt-score>div:first-child b{font-size:2.4rem;color:var(--brand)}
.pt-bar{display:grid;grid-template-columns:90px 1fr 56px;align-items:center;gap:10px;margin:6px 0;font-size:14px}
.pt-bar div{height:10px;background:#e5e7eb;border-radius:6px;overflow:hidden}.pt-bar i{display:block;height:100%;background:#14b8a6}.pt-bar b{text-align:right}
.pt-link{border-top:1px solid var(--line);padding-top:12px}
.pt-lib{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr));gap:12px}
.pt-card{border:1px solid var(--line);border-radius:10px;padding:12px 14px;display:flex;flex-direction:column;gap:4px}
.pt-card.is-off{opacity:.6}.pt-code{font-size:1.05rem;color:var(--brand)}
.pt-band{border-bottom:1px dashed var(--line);padding:10px 0}
@media (max-width:600px){.pt-img{width:76px;height:76px}.pt-opt-img{width:60px;height:60px}.pt-score{flex-direction:column;align-items:flex-start;gap:8px}}

/* ---------- Trình soạn đề Placement ---------- */
.pe-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;position:sticky;top:8px;z-index:20;box-shadow:0 6px 18px rgba(15,23,42,.08)}
.pe-sec-head{display:flex;align-items:center;gap:8px;margin-bottom:12px}.pe-title{font-weight:700}
.pe-sec-media{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:12px;margin:12px 0}
.pe-media{display:flex;align-items:center;gap:10px;border:1px dashed var(--line);border-radius:10px;padding:8px;flex-wrap:wrap;min-width:0}
.pe-media img{width:72px;height:72px;object-fit:contain;border-radius:6px;background:#f8fafc}
.pe-media audio{width:100%;max-width:320px}
.pe-media-act{display:flex;gap:6px;align-items:center;flex-wrap:wrap}.pe-media-act select{width:auto;max-width:150px;padding:4px 8px;font-size:13px}
.pe-media-sm{border-style:dotted;padding:4px;flex-shrink:0}.pe-media-sm img{width:52px;height:52px}
.pe-media-audio{flex-direction:column;align-items:stretch}
.pe-noimg{font-size:12px;color:var(--muted);padding:0 4px}
.pe-loading{opacity:.5;pointer-events:none}
.pe-choices{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,220px),1fr));gap:8px;margin:6px 0 12px;align-items:start}
.pe-choice{display:flex;flex-direction:column;gap:6px;border:1px solid var(--line);border-radius:10px;padding:8px}
.pe-items{display:grid;gap:10px}
.pe-item{border:1px solid var(--line);border-left:4px solid var(--ok);border-radius:10px;padding:10px 12px;background:#fff}
.pe-item.pe-miss{border-left-color:var(--danger);background:#fff7f7}
.pe-item-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.pe-miss-tag{display:none;color:var(--danger);font-size:12px;font-weight:700}.pe-miss .pe-miss-tag{display:inline}
.pe-item-body{display:flex;gap:12px;align-items:flex-start}.pe-item-body>.grow{min-width:0}
.pe-pts{width:70px;display:inline-block;padding:4px 6px}
.pe-opts{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.pe-opts-list{display:grid;gap:6px}
.pe-opt{display:flex;align-items:center;gap:8px}
.pe-pick{display:inline-flex;align-items:center;gap:4px;border:1.5px solid var(--line);border-radius:8px;padding:4px 10px;cursor:pointer;font-weight:700}
.pe-pick:has(input:checked){border-color:var(--ok);background:#f0fdf4;color:#166534}
.pe-add{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.pe-modal{position:fixed;inset:0;background:rgba(15,23,42,.45);display:grid;place-items:center;z-index:100;padding:16px}
.pe-modal>.card{width:min(560px,100%);max-height:90vh;overflow:auto;margin:0}
@media (max-width:700px){.pe-item-body{flex-direction:column}.pe-opt{flex-wrap:wrap}}
.pt-start h2{margin-top:0}.pt-start ul{padding-left:20px;line-height:1.7}.pt-start .btn{min-height:56px;font-size:18px}
.pt-lock{background:rgba(15,23,42,.96);z-index:200}.pt-lock>.card{text-align:center;max-width:440px}
html:fullscreen,html:-webkit-full-screen{overflow:auto;background:var(--bg)}
.pt-proctor{display:inline-flex;gap:6px;align-items:center;flex-wrap:wrap}

.pt-passage{background:#fffbeb;border:1px solid #fde68a;border-radius:10px;padding:12px 14px;margin-bottom:12px;color:var(--ink);font-size:16px;line-height:1.75}
/* Phiếu nhận xét & quy tắc xếp lớp */
.pr-head{display:flex;gap:28px;align-items:flex-end;flex-wrap:wrap;margin-top:4px}.pr-big{font-size:1.6rem;color:var(--brand);margin-right:6px}
.pr-classes{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:8px}
.pr-cl{display:flex;gap:8px;align-items:flex-start;border:1px solid var(--line);border-radius:8px;padding:8px 10px;cursor:pointer;font-weight:400}.pr-cl input{margin-top:3px}
.pr-sum td,.pr-sum th{text-align:center;white-space:nowrap}.pr-sum th:first-child{text-align:left}.pr-sum td.pr-on{background:#ecfdf5;color:#065f46;font-weight:600}
.pr-grade>summary{cursor:pointer;list-style:none}.pr-grade>summary::-webkit-details-marker{display:none}.pr-grade>summary h2:before{content:'▸ ';color:var(--muted)}.pr-grade[open]>summary h2:before{content:'▾ '}
.pr-mini .input{padding:6px 8px}.pr-mini td,.pr-mini th{padding:6px 8px}
.pr-prog{border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin-top:10px}.pr-prog-h{margin-bottom:6px}
.pr-save{position:sticky;bottom:0;z-index:5;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.pr-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.field label .field-manage{float:right;font-weight:500;font-size:12px}
.ci-table td{vertical-align:top}.ci-table .input{min-width:190px;padding:6px 8px}.ci-desc{max-width:280px;color:var(--muted)}.ci-table tr.is-off td{opacity:.55}
.hd-switch{display:flex;gap:10px;align-items:flex-start;font-weight:400;cursor:pointer}.hd-switch input{margin-top:4px;width:18px;height:18px}.nowrap{white-space:nowrap}form.inline{display:inline}
.btn-del:hover{color:#b91c1c;border-color:#fecaca;background:#fef2f2}.btn[disabled]{opacity:.4;cursor:not-allowed}
.name-link{color:var(--ink)}.name-link:hover{color:var(--brand);text-decoration:underline}
.role-picks{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:8px}.role-pick{display:flex;gap:8px;align-items:flex-start;border:1px solid var(--line);border-radius:8px;padding:8px 10px;cursor:pointer;font-weight:400}.role-pick input{margin-top:3px}.role-pick:has(input:checked){border-color:var(--brand);background:#f0fdfa}
.crud-tabs{display:flex;gap:6px;flex-wrap:wrap;margin:4px 0 12px}.crud-tabs a{padding:7px 14px;border-radius:10px;color:var(--ink);font-weight:500;text-decoration:none}.crud-tabs a:hover{background:#f1f5f9}.crud-tabs a.active{background:#e2e8f0;font-weight:600}.crud-tabs .badge{margin-left:4px}
.ci-key td{background:#f0fdfa}
.bulk-bar{position:sticky;top:0;z-index:6;display:flex;gap:10px;align-items:center;flex-wrap:wrap;background:#ecfdf5;border:1px solid #a7f3d0;border-radius:10px;padding:8px 12px;margin-bottom:10px}
.tx-range{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:10px;padding:2px 2px 2px 10px;background:var(--card)}
.tx-range span{font-size:12px;color:var(--muted);white-space:nowrap}.tx-range i{color:var(--muted);font-style:normal}.tx-range .input{border:0;min-width:0;width:140px;padding-left:4px;padding-right:4px}
.stage-pills{display:flex;flex-wrap:wrap;gap:8px;margin:2px 0 14px}
.stage-pills a{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;background:#e6f4f1;color:#1f6f63;font-weight:600;font-size:14px;text-decoration:none;border:1px solid transparent}
.stage-pills a span{background:#fff;color:#1f6f63;border-radius:999px;padding:0 7px;font-size:12px;min-width:20px;text-align:center}
.stage-pills a:hover{border-color:#2a7a6d}
.stage-pills a.active{background:#2a7a6d;color:#fff}.stage-pills a.active span{background:rgba(255,255,255,.25);color:#fff}
.stage-pills a.is-lost{background:#fde8e8;color:#9b1c1c}.stage-pills a.is-lost span{color:#9b1c1c}.stage-pills a.is-lost.active{background:#b91c1c;color:#fff}
.card:has(> .card-back){position:relative}.card-back{position:absolute;top:14px;right:14px}.card:has(> .card-back) > .flex.between{padding-right:120px}@media (max-width:640px){.card:has(> .card-back) > .flex.between{padding-right:0;padding-top:34px}}
.vq-box{display:flex;gap:14px;align-items:center;border:1px dashed var(--line);border-radius:10px;padding:10px;margin:0 0 12px;font-size:13px}.vq-box[hidden]{display:none}.vq-img{width:150px;flex-shrink:0;background:#fff}.vq-img svg{width:100%;height:auto;display:block}.vq-info div{margin:2px 0}.vq-title{font-weight:700;color:var(--brand)}@media (max-width:640px){.vq-box{flex-direction:column;align-items:flex-start}}
/* Kho bài tập */
.hw-lib{display:grid;grid-template-columns:280px 1fr;gap:16px;align-items:start}
.hw-tree{position:sticky;top:76px;max-height:calc(100vh - 100px);overflow:auto}
.hw-tree details{border-bottom:1px solid var(--line);padding:4px 0}
.hw-tree summary{display:flex;align-items:center;gap:8px;cursor:pointer;padding:6px 4px;list-style:none}
.hw-tree summary::-webkit-details-marker{display:none}
.hw-tree summary a{flex:1;color:var(--ink);font-weight:600;display:flex;align-items:center;gap:6px}
.hw-tree a.active{color:var(--brand)}
.hw-sub{display:flex;justify-content:space-between;padding:5px 8px 5px 28px;border-radius:8px;color:var(--ink);font-size:14px}
.hw-sub:hover{background:var(--bg);text-decoration:none}.hw-sub.active{background:var(--brand-50);font-weight:600}
.hw-auto{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.hw-score{display:flex;align-items:center;gap:18px}
.hw-score-n{font-size:30px;color:var(--brand);white-space:nowrap}.hw-score-n b{font-size:44px}
@media (max-width:900px){.hw-lib{grid-template-columns:1fr}.hw-tree{position:static;max-height:none}}
.cl-text{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:14px;line-height:1.6;max-height:360px;overflow:auto;word-break:break-word}
/* Khóa học: Kanban / bảng gọn / chi tiết */
.seg-tabs{display:inline-flex;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:3px;gap:2px}
.seg-tabs a{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:8px;color:var(--muted);font-weight:600;font-size:14px}
.seg-tabs a.active{background:var(--card);color:var(--brand);box-shadow:var(--shadow)}.seg-tabs a:hover{text-decoration:none;color:var(--ink)}
.co-toolbar .stage-pills{margin-top:10px}
.co-board{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px;align-items:start}
.co-col{background:#eef2f5;border-radius:14px;padding:10px}
.co-col h3{display:flex;justify-content:space-between;align-items:center;font-size:14px;margin:4px 4px 10px;color:var(--ink)}
.co-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin-bottom:8px;box-shadow:var(--shadow);transition:border-color .15s}
.co-card:hover{border-color:var(--brand-600)}.co-card.is-off{opacity:.6}
.co-card-head{display:flex;gap:8px;align-items:flex-start;justify-content:space-between}
.co-name{font-weight:700;color:var(--ink);font-size:15px;line-height:1.3}.co-name:hover{color:var(--brand)}
.co-icon{color:var(--muted);flex-shrink:0;padding:2px}.co-icon:hover{color:var(--brand)}
.co-meta{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:4px;font-size:12.5px;color:var(--muted)}
.co-meta code{background:var(--brand-50);color:var(--brand);padding:1px 6px;border-radius:6px;font-size:12px}
.co-stats{display:flex;flex-wrap:wrap;gap:4px 12px;margin:8px 0 6px;font-size:13px;color:var(--text)}
.co-stats span{display:inline-flex;align-items:center;gap:4px}
.co-prog{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted)}.co-prog .progress{flex:1;height:6px}
.co-prog span{white-space:nowrap}.co-prog-lg{margin:4px 0 12px}.co-prog-lg .progress{height:8px}
.co-table td{vertical-align:middle}.co-table tr.is-off td{opacity:.55}
.co-hero{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;flex-wrap:wrap}.co-hero h1{font-size:1.5rem;margin:4px 0}
.co-lessons{max-height:560px;overflow:auto;border-top:1px solid var(--line)}
.co-lesson{display:grid;grid-template-columns:36px 1fr auto;gap:8px;align-items:start;padding:8px 4px;border-bottom:1px solid #f1f5f9;font-size:14px}
.co-lesson>b{color:var(--muted);text-align:right}.co-flags{display:flex;gap:4px}
.co-dl{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:0 0 8px;font-size:14px}.co-dl dt{color:var(--muted)}.co-dl dd{margin:0;font-weight:600}
.co-classes li{display:block}
.co-head{padding:10px 14px;margin-bottom:14px}
.co-head-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px}.co-head-row+.co-head-row{margin-top:8px;padding-top:8px;border-top:1px solid var(--line)}
.co-stat-bar{display:flex;flex-wrap:wrap;gap:4px 18px;flex:1;min-width:0}
.co-stat{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;color:var(--muted);white-space:nowrap}.co-stat svg{color:var(--brand)}.co-stat b{font-size:17px;color:var(--ink)}
.co-actions{display:flex;flex-wrap:wrap;gap:6px}
.co-search{flex:0 1 260px;min-width:160px;height:36px}
.seg-tabs small{margin-left:4px;font-size:11.5px;opacity:.75}.co-head .seg-tabs a{padding:5px 10px;font-size:13.5px}
/* Lớp học: Kanban theo khóa / bảng nhóm theo khóa */
.cs-sel{max-width:170px;height:36px}.co-head form .co-search{flex-basis:190px}
.co-col h3 a{color:var(--ink)}.co-col h3 a:hover{color:var(--brand)}
.cs-card{border-left:3px solid var(--line)}.cs-card.st-running{border-left-color:var(--ok)}.cs-card.st-open{border-left-color:#3b82f6}.cs-card.st-planning{border-left-color:#94a3b8}
.cs-card.st-finished,.cs-card.st-cancelled{opacity:.65}
.cs-sub{margin-top:2px}
.cs-line{display:flex;gap:6px;align-items:flex-start;font-size:12.5px;color:var(--text);margin-top:5px;line-height:1.35}.cs-line svg{flex-shrink:0;margin-top:2px;color:var(--muted)}
.cs-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:8px}
.cs-seat{display:flex;align-items:center;gap:6px;flex:1;font-size:12px;color:var(--muted)}.cs-seat .progress{flex:1;height:6px;max-width:110px}
.cs-seat b{color:var(--ink)}.cs-seat.is-near .progress i{background:var(--warn)}.cs-seat.is-full .progress i{background:var(--danger)}.cs-seat.is-full b{color:var(--danger)}
.cs-table td{vertical-align:middle}.cs-group th{background:var(--bg);text-transform:none;letter-spacing:0;color:var(--ink);text-align:left;font-size:14px;padding:8px 12px}.cs-group th a{color:var(--ink);margin-right:8px}
a.co-stat-link{color:var(--muted);border-radius:8px;padding:2px 6px;margin:-2px -6px}a.co-stat-link:hover{background:var(--bg);text-decoration:none;color:var(--ink)}
.seg-scroll{max-width:100%;overflow-x:auto;scrollbar-width:thin}.seg-scroll a{white-space:nowrap}
/* Học viên: thẻ theo khóa học */
.st-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:7px 10px;margin-bottom:6px;color:var(--text);font-size:13px}
.st-card:hover{border-color:var(--brand-600);text-decoration:none}
.st-name{display:block;font-weight:600;color:var(--ink);font-size:13.5px}
.st-sub{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:2px;font-size:12px}
.st-sub code,.st-cls{background:var(--brand-50);color:var(--brand);padding:1px 6px;border-radius:6px;font-size:11.5px}
.st-table td{vertical-align:middle}.p-pad:not(:empty){padding:8px 12px}
.bulk-bar[hidden]{display:none!important}.card.p0 .bulk-bar{margin:10px 12px}
.cr-kids{color:var(--text);margin-top:3px;display:flex;gap:4px;align-items:flex-start}.cr-kids svg{flex-shrink:0;margin-top:2px;color:var(--muted)}
/* ---------- Menu gọn: thanh biểu tượng theo nhóm + bảng mục bật ra ---------- */
.rail{display:none}
.mm-rail{display:none}body.menu-rail .mm-rail{display:inline}body.menu-rail .mm-full{display:none}
.menu-mode{display:flex;align-items:center;gap:8px;margin:6px 10px 12px;padding:8px 12px;border:1px solid rgba(255,255,255,.14);border-radius:10px;background:transparent;color:var(--side-ink);font:inherit;font-size:13px;cursor:pointer}
.menu-mode:hover{background:rgba(255,255,255,.07)}
@media (min-width:1025px){
  body.menu-rail .sidebar{width:92px}
  body.menu-rail .main{margin-left:92px}
  body.menu-rail .nav{display:none}
  body.menu-rail .brand{justify-content:center;padding:16px 0}
  body.menu-rail .brand > div:last-child{display:none}
  body.menu-rail .rail{display:flex;flex-direction:column;gap:4px;padding:10px 8px;flex:1;overflow-y:auto;scrollbar-width:none}
  body.menu-rail .menu-mode{justify-content:center;margin:6px 8px 12px;padding:8px 4px;font-size:11px;flex-direction:column;gap:2px}
  .rail-btn{display:flex;flex-direction:column;align-items:center;gap:4px;padding:9px 4px;border:0;border-radius:12px;background:transparent;color:var(--side-ink);font:inherit;font-size:11px;font-weight:600;line-height:1.2;text-align:center;cursor:pointer;width:100%}
  .rail-btn:hover,.rail-btn[aria-expanded="true"]{background:rgba(255,255,255,.08);color:#fff;text-decoration:none}
  .rail-btn.active{background:rgba(20,184,166,.24);color:#fff}
  .zone-platform .rail-btn.active{background:rgba(129,140,248,.3)}
  .rail-pop{display:none;position:fixed;left:92px;top:0;bottom:0;width:260px;background:var(--card);border-right:1px solid var(--line);box-shadow:12px 0 30px rgba(15,23,42,.12);padding:16px 10px;z-index:45;overflow-y:auto}
  .rail-pop.open{display:block;animation:railIn .14s ease-out}
  .rail-pop-title{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:700;margin:4px 10px 10px}
  .rail-pop a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:var(--text);font-weight:500;font-size:14px}
  .rail-pop a:hover{background:var(--bg);text-decoration:none;color:var(--ink)}
  .rail-pop a.active{background:var(--brand-50);color:var(--brand);font-weight:600}
  .rail-pop a svg{color:var(--muted)}.rail-pop a.active svg{color:var(--brand)}
  body.menu-rail [data-collapse-sidebar]{display:none}
}
@keyframes railIn{from{opacity:0;transform:translateX(-8px)}to{opacity:1;transform:none}}
.tx-pct{font-size:13px;color:var(--ink)}.co-head .tx-range .input{height:32px;width:130px}
.inv-code b{font-size:13px;white-space:nowrap}.inv-code{white-space:nowrap}

.msg-img{display:block;max-width:240px;max-height:240px;border-radius:10px;margin-bottom:4px}
.msg-file{display:inline-flex;align-items:center;gap:6px;color:inherit;text-decoration:underline;margin-bottom:2px}
#chat-live{display:flex;align-items:center;gap:6px}#chat-live.off{color:var(--danger)}
.zl-qr{display:block;width:220px;height:220px;border:1px solid var(--line);border-radius:12px;background:#fff;padding:8px;margin:8px 0}
.zl-live{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center;font-size:13px}