/* ===== Web Coway Bot – giao diện (màu Coway: xanh dương đậm, thanh menu trái xanh navy) =====
   Biến --line --ui --ink … dùng chung với css/tai-khoan.css (màn hình js/40 của website). */
:root{
  --chinh:#0a5bd3; --chinh-dam:#073f99; --chinh-nhat:#e8f0fd; --navy:#0b1f3f; --navy-2:#132c55;
  --ink:#16233a; --muted:#64748b; --line:#dbe3ee; --paper:#f4f7fb; --nen:#eef3f9; --trang:#fff;
  --ui:var(--chinh); --ui-soft:var(--chinh-nhat); --danger:#d23f3f;
  --xanh:#16a34a; --cam:#e08a00; --do:#d23f3f; --tim:#7c4dd6;
  --f:"Be Vietnam Pro",system-ui,"Segoe UI",Arial,sans-serif; --fh:"Lexend","Be Vietnam Pro",system-ui,Arial,sans-serif;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;height:100%}
body{font:14px/1.5 var(--f);color:var(--ink);background:var(--nen)}
a{color:var(--chinh)}
button{font-family:inherit}
code{background:var(--paper);border:1px solid var(--line);border-radius:4px;padding:0 4px;font-size:12.5px}
.nut{border:1px solid var(--line);background:var(--trang);color:var(--ink);border-radius:8px;padding:8px 14px;font:600 13.5px var(--f);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:6px}
.nut:hover{border-color:var(--chinh)}.nut.chinh{background:var(--chinh);border-color:var(--chinh);color:#fff}.nut.chinh:hover{background:var(--chinh-dam)}
.nut.nho{padding:5px 10px;font-size:12.5px}.nut.to{width:100%;padding:11px;font-size:15px}.nut:disabled{opacity:.6;cursor:default}
.dang,.trong{color:var(--muted);padding:14px;font-size:13px}.loi{color:var(--do);padding:12px}
.ghi{color:var(--muted);font-size:12.5px;margin:4px 0}
.xanh{color:var(--xanh)}.cam{color:var(--cam)}.do{color:var(--do)}

/* ---------- Đăng nhập ---------- */
.dn{min-height:100%;display:grid;grid-template-columns:1.1fr 1fr}
.dn-trai{background:linear-gradient(150deg,var(--navy) 0%,var(--chinh-dam) 55%,var(--chinh) 100%);color:#fff;padding:56px 7vw;display:flex;flex-direction:column;justify-content:center;gap:18px}
.dn-trai h1{font:600 32px/1.25 var(--fh);margin:0;max-width:520px}
.dn-trai ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:14px;max-width:520px}
.dn-trai li{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);border-radius:12px;padding:12px 16px;line-height:1.55}
.dn-trai li b{display:block;font-size:15px}
.dn-ghi{opacity:.75;font-size:13px;margin:0}
.dn-logo{display:flex;align-items:baseline;gap:8px;font-family:var(--fh)}
.dn-logo b{font-size:30px;letter-spacing:1px}.dn-logo span{background:#ffc21a;color:#3a2a00;border-radius:6px;padding:1px 8px;font-weight:700;font-size:14px}
.dn-logo.nho{justify-content:center;margin-bottom:6px}.dn-logo.nho b{font-size:24px;color:var(--chinh)}
.dn-phai{display:flex;align-items:center;justify-content:center;padding:32px 16px;background:var(--nen)}
.dn-the{background:var(--trang);border:1px solid var(--line);border-radius:18px;padding:28px 26px;width:100%;max-width:420px;box-shadow:0 18px 40px rgba(11,31,63,.08);display:flex;flex-direction:column;gap:10px}
.dn-the h2{margin:4px 0 0;font:600 22px var(--fh);text-align:center}
.dn-the .ghi{text-align:center}
.dn-the form{display:flex;flex-direction:column;gap:12px;margin-top:6px}
.dn-the label,.ket-noi label{display:flex;flex-direction:column;gap:5px;font-size:12.5px;font-weight:600;color:var(--muted)}
.dn-the input,.ket-noi input{border:1px solid var(--line);border-radius:10px;padding:10px 12px;font:14px var(--f);color:var(--ink);background:#fff;width:100%}
.dn-the input:focus,.ket-noi input:focus{outline:3px solid var(--chinh-nhat);border-color:var(--chinh)}
.o-mk{position:relative;display:block}.o-mk input{padding-right:42px}.o-mk button{position:absolute;right:6px;top:50%;transform:translateY(-50%);border:0;background:none;cursor:pointer;font-size:16px;opacity:.6}
.dn-lnk{text-align:center;font-size:13px;margin:4px 0 0}.dn-lnk a{cursor:pointer;font-weight:600}.dn-lnk.nho{font-size:12px}.dn-lnk.nho a{color:var(--muted);font-weight:500}
.tb-dn{border-radius:10px;padding:9px 12px;font-size:13px;border:1px solid}
.tb-dn.ok{background:#eaf7ee;border-color:#b7e0c3;color:#1b6b34}.tb-dn.err{background:#fdecec;border-color:#f3b4b4;color:#a12020}.tb-dn.warn{background:#fff6e0;border-color:#f3d58a;color:#7a4e00}
.quen p{background:var(--paper);border-radius:10px;padding:10px 12px;margin:0 0 8px;font-size:13px}
.ket-noi{display:flex;flex-direction:column;gap:10px}.ket-noi h3{margin:0}.ket-noi .hang{display:flex;gap:8px;flex-wrap:wrap}
.dn-the .ket-noi{border:0;padding:0;background:none}.dn-the .ket-noi h3{display:none}

/* ---------- Khung làm việc ---------- */
.app{height:100%;display:flex;flex-direction:column}
.tb{height:58px;flex:none;background:var(--chinh);color:#fff;display:flex;align-items:center;gap:18px;padding:0 18px;position:relative;z-index:30}
.tb-menu{display:none;border:0;background:none;color:#fff;font-size:22px;cursor:pointer}
.tb-logo{display:flex;align-items:baseline;gap:6px;text-decoration:none;color:#fff;font-family:var(--fh)}.tb-logo b{font-size:20px;letter-spacing:.6px}
.tb-logo span{background:#ffc21a;color:#3a2a00;border-radius:5px;padding:0 6px;font-weight:700;font-size:12px}
.tb-nav{display:flex;gap:4px;margin-left:18px}.tb-nav a{color:#fff;text-decoration:none;padding:6px 12px;border-radius:8px;font-weight:500;opacity:.92}.tb-nav a:hover{background:rgba(255,255,255,.14);opacity:1}
.tb-phai{margin-left:auto;display:flex;align-items:center;gap:10px}
.tb-dem{background:#fff;color:var(--chinh-dam);border-radius:999px;padding:4px 12px;font-size:13px;font-weight:600}
.tb-tb{position:relative}
.tb-chuong,.tb-nguoi{border:0;background:rgba(255,255,255,.14);color:#fff;border-radius:999px;cursor:pointer;display:flex;align-items:center;gap:8px}
.tb-chuong{width:38px;height:38px;justify-content:center;font-size:17px;position:relative}
.tb-chuong i{position:absolute;top:-3px;right:-3px;background:#ff4d4f;color:#fff;font-style:normal;font-size:11px;font-weight:700;border-radius:999px;min-width:18px;height:18px;display:flex;align-items:center;justify-content:center;padding:0 4px}
.tb-nguoi{padding:3px 12px 3px 3px;font-weight:600;font-size:13px;max-width:220px}.tb-nguoi span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tb-nguoi .tk-av{width:32px;height:32px;font-size:13px;border:2px solid #fff}
.tb-hop{position:absolute;right:0;top:calc(100% + 8px);background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:14px;box-shadow:0 16px 40px rgba(11,31,63,.18);width:340px;max-height:70vh;overflow:auto;padding:8px;z-index:40}
.tb-hop-tieu{font-weight:700;padding:6px 8px 8px;border-bottom:1px solid var(--line);margin-bottom:6px}
.tb-tb-o{padding:9px 10px;border-radius:10px;font-size:13px}.tb-tb-o+.tb-tb-o{margin-top:4px}.tb-tb-o p{margin:3px 0 0;color:var(--muted)}
.tb-tb-o.het{background:#fdecec}.tb-tb-o.sap{background:#fff6e0}.tb-tb-o.con,.tb-tb-o.admin{background:var(--chinh-nhat)}
.tb-hop-nguoi{width:250px}.tb-hop-nguoi a,.tb-hop-nguoi button{display:block;width:100%;text-align:left;padding:9px 10px;border-radius:8px;color:var(--ink);text-decoration:none;border:0;background:none;font:14px var(--f);cursor:pointer}
.tb-hop-nguoi a:hover,.tb-hop-nguoi button:hover{background:var(--paper)}.tb-hop-nguoi button{color:var(--do)}
.tb-hop-dau{display:flex;gap:10px;align-items:center;padding:6px 8px 10px;border-bottom:1px solid var(--line);margin-bottom:4px}.tb-hop-dau small{display:block;color:var(--muted)}
.bn{flex:none;background:var(--chinh-nhat);color:var(--chinh-dam);text-align:center;padding:7px 16px;font-size:13.5px;border-bottom:1px solid var(--line)}
.bn.sap{background:#fff3d6;color:#7a4e00}.bn.het{background:#fdecec;color:#a12020}.bn a{font-weight:700;color:inherit}
.than{flex:1;display:flex;min-height:0}
.sb{width:256px;flex:none;background:var(--navy);color:#cbd6e8;display:flex;flex-direction:column;overflow-y:auto;padding:12px 10px}
.sb-tk{display:flex;gap:10px;align-items:center;background:var(--navy-2);border-radius:12px;padding:10px}
.sb-tk b{color:#fff;display:block;font-size:14px;line-height:1.3}.sb-tk .tk-av{border-color:rgba(255,255,255,.4)}
.sb-vai{display:inline-block;margin-top:3px;font-size:11px;font-weight:700;border-radius:999px;padding:1px 8px;background:rgba(255,255,255,.12);color:#fff}
.sb-vai.admin{background:#ffc21a;color:#3a2a00}.sb-vai.hm{background:#3b82f6}.sb-vai.hp{background:#10b981}
.sb-dung{background:var(--navy-2);border-radius:12px;padding:10px 12px;margin-top:8px;font-size:12px}
.sb-dung>div:first-child{display:flex;justify-content:space-between;color:#fff}.sb-dung small{color:#94a3b8}
.sb-thanh{height:5px;background:rgba(255,255,255,.12);border-radius:99px;margin:7px 0 4px;overflow:hidden}.sb-thanh i{display:block;height:100%;background:#60a5fa;border-radius:99px}
.sb-menu{display:flex;flex-direction:column;gap:2px;margin-top:10px}
.sb-nhom{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.7px;color:#7d8fb0;padding:12px 10px 4px}
.sb-menu a{color:#d6e0f0;text-decoration:none;padding:9px 12px;border-radius:9px;font-size:13.5px;display:flex;align-items:center;gap:4px}
.sb-menu a:hover{background:rgba(255,255,255,.07);color:#fff}.sb-menu a.on{background:var(--chinh);color:#fff;font-weight:600}
.sb-menu a.khoa{opacity:.5}.sb-menu a i{margin-left:auto;font-style:normal;font-size:11px}
.sb-out{margin-top:auto;border:0;background:#d23f3f;color:#fff;border-radius:10px;padding:10px;font-weight:700;cursor:pointer;flex:none}
.sb-menu+.sb-out{margin-top:16px}
.sb-nen{position:fixed;inset:58px 0 0 0;background:rgba(0,0,0,.35);z-index:19}
.nd{flex:1;min-width:0;overflow-y:auto;padding:20px 24px 40px}
.nd.nd-tro-ly,.nd.nd-vip-tu-van,.nd.nd-vip-trang,.nd.nd-ad-thong-ke{padding:0;overflow:hidden;display:flex}
.nd-dau{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.nd-dau h1{margin:0;font:600 22px var(--fh)}.nd-dau p{margin:2px 0 0;color:var(--muted)}
.khoi{background:var(--trang);border:1px solid var(--line);border-radius:14px;padding:16px}
.khoi h3{margin:0 0 8px;font:600 15px var(--fh)}
.khoi-dau{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.khoi-dau h3{margin:0}.khoi-dau a{font-size:13px;font-weight:600;text-decoration:none}
.luoi-so{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin-bottom:16px}
.o-so{background:var(--trang);border:1px solid var(--line);border-radius:14px;padding:14px 16px;display:flex;flex-direction:column;gap:2px}
.o-so small{color:var(--muted);font-size:12.5px}.o-so b{font:600 24px var(--fh);font-variant-numeric:tabular-nums}.o-so span{color:var(--muted);font-size:12.5px}
.o-so.canh{border-color:#f3d58a;background:#fffaf0}.o-so.het{border-color:#f3b4b4;background:#fff5f5}.o-so.nhan{border-color:var(--chinh);box-shadow:0 0 0 3px var(--chinh-nhat)}
.nhanh{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin-bottom:16px}
.nhanh-o{background:var(--trang);border:1px solid var(--line);border-radius:14px;padding:14px 16px;text-decoration:none;color:var(--ink);display:grid;grid-template-columns:auto 1fr;column-gap:12px;align-items:center}
.nhanh-o span{grid-row:span 2;font-size:26px}.nhanh-o small{color:var(--muted)}.nhanh-o:hover{border-color:var(--chinh);box-shadow:0 6px 18px rgba(10,91,211,.1)}.nhanh-o.khoa{opacity:.5;pointer-events:none}
.hai-cot{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.ds-gon{display:flex;flex-direction:column}
.ds-dong{padding:9px 2px;border-bottom:1px solid var(--line)}.ds-dong:last-child{border-bottom:0}.ds-dong p{margin:2px 0}.ds-dong small{color:var(--muted)}
.the-hm{display:inline-block;background:var(--chinh-nhat);color:var(--chinh-dam);font-size:11px;font-weight:600;border-radius:999px;padding:1px 8px}
.o-khoa{background:var(--trang);border:1px dashed var(--line);border-radius:16px;padding:36px 20px;text-align:center;max-width:520px;margin:30px auto;display:flex;flex-direction:column;gap:8px;align-items:center}
.o-khoa div{font-size:36px}.o-khoa b{font:600 18px var(--fh)}.o-khoa p{margin:0;color:var(--muted)}
.luoi-hm{display:grid;grid-template-columns:repeat(auto-fill,minmax(380px,1fr));gap:14px}
.hm-o{background:var(--trang);border:1px solid var(--line);border-radius:16px;padding:18px 20px}
.hm-tieu{display:flex;align-items:center;gap:10px;font:600 16px var(--fh)}.hm-tieu span{width:34px;height:34px;border-radius:10px;background:var(--chinh-nhat);display:flex;align-items:center;justify-content:center}
.hm-than{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:10px}
.hm-chu{display:flex;flex-direction:column}.hm-chu small{color:var(--muted);font-size:12.5px;margin-top:8px}.hm-chu b{font-size:16px;color:var(--chinh-dam)}.hm-chu b.xanh{color:var(--xanh)}.hm-chu b.cam{color:var(--cam)}.hm-chu b.do{color:var(--do)}
.vong{width:130px;height:130px;flex:none}.vong-nen{fill:none;stroke:#e8edf4;stroke-width:12}.vong-chay{fill:none;stroke-width:12;stroke-linecap:round}
.vong-so{font:700 24px var(--fh);fill:var(--ink)}.vong-chu{font:12px var(--f);fill:var(--muted)}
.goi{display:grid;grid-template-columns:300px 1fr;gap:20px;align-items:start}
.goi-trang{border-radius:14px;padding:18px;background:#eaf7ee;display:flex;flex-direction:column;gap:4px}.goi-trang b{font:600 22px var(--fh)}.goi-trang small,.goi-trang span{color:var(--muted)}
.goi-trang.sap{background:#fff6e0}.goi-trang.het{background:#fdecec}
.goi-ghi p{margin:0 0 10px;line-height:1.6}
.luoi-hd{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:14px}.luoi-hd p{margin:0;line-height:1.6;color:#334155}
.nhung{flex:1;display:flex}.nhung iframe{flex:1;border:0;width:100%;height:100%;background:var(--nen)}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--navy);color:#fff;padding:10px 18px;border-radius:10px;z-index:100;font-size:13.5px}.toast.err{background:var(--do)}

/* ---------- Trợ lý (chat) ---------- */
.chat{flex:1;display:grid;grid-template-columns:290px 1fr 300px;min-height:0;background:var(--trang)}
.chat.an-phai{grid-template-columns:290px 1fr 0}.chat.an-phai .ct-phai{display:none}
.ct-trai{border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
.ct-trai-dau{display:flex;align-items:center;justify-content:space-between;padding:14px 14px 8px}.ct-trai-dau b{font:600 17px var(--fh)}
.ct-tim{margin:0 14px 10px;border:1px solid var(--line);border-radius:10px;padding:8px 12px;font:13.5px var(--f)}
.ct-ds{flex:1;overflow-y:auto;padding:0 6px 10px}
.ht-o{display:grid;grid-template-columns:36px 1fr auto;gap:10px;align-items:start;padding:10px;border-radius:12px;cursor:pointer;position:relative}
.ht-o:hover{background:var(--paper)}.ht-o.on{background:var(--chinh-nhat);box-shadow:inset 3px 0 0 var(--chinh)}
.ht-o b{display:block;font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ht-o p{margin:1px 0 0;font-size:12.5px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ht-o small{color:var(--muted);font-size:11.5px}.ht-o>div{min-width:0}
.ht-av,.tn-av{width:36px;height:36px;border-radius:50%;background:var(--chinh-nhat);display:flex;align-items:center;justify-content:center;font-size:18px;flex:none}
.tn-av.to{width:40px;height:40px}
.ht-xoa{position:absolute;right:8px;bottom:8px;border:0;background:none;color:var(--muted);cursor:pointer;opacity:0;font-size:12px}.ht-o:hover .ht-xoa{opacity:1}
.ct-giua{display:flex;flex-direction:column;min-width:0;min-height:0;background:#f7f9fc}
.ct-dau{display:flex;align-items:center;gap:10px;padding:10px 16px;background:var(--trang);border-bottom:1px solid var(--line)}
.ct-dau b{display:block}.ct-dau small{color:var(--muted);font-size:12px}
.ct-che{margin-left:auto;border-radius:999px;padding:3px 12px;font-size:12px;font-weight:700}.ct-che.cao{background:#fff3d6;color:#8a5a00}.ct-che.mien{background:#eef1f5;color:var(--muted)}
.ct-an-phai{border:1px solid var(--line);background:#fff;border-radius:8px;cursor:pointer;padding:4px 8px;color:var(--muted)}
.ct-bao{background:#fff6e0;color:#7a4e00;font-size:13px;padding:8px 16px;border-bottom:1px solid #f3d58a}
.ct-tin{flex:1;overflow-y:auto;padding:18px 18px 8px;display:flex;flex-direction:column;gap:12px}
.tn{display:flex;gap:10px;max-width:780px}.tn.toi{align-self:flex-end;flex-direction:column;align-items:flex-end}
.tn-bong{border-radius:16px;padding:10px 14px;line-height:1.55;word-break:break-word}
.tn.toi .tn-bong{background:var(--chinh);color:#fff;border-bottom-right-radius:4px;white-space:pre-wrap}
.tn.bot .tn-bong{background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px}
.tn.bot{cursor:pointer}.tn.bot.chon .tn-bong{border-color:var(--chinh);box-shadow:0 0 0 3px var(--chinh-nhat)}
.tn.loi .tn-bong{background:#fdecec;border-color:#f3b4b4;color:#a12020}
.tn small{color:var(--muted);font-size:11.5px;display:block;margin-top:3px}
.tn .gd{display:block;padding-left:4px}
.nh{font-weight:600}.nh.xanh{color:var(--xanh)}.nh.cam{color:var(--cam)}.nh.do{color:var(--do)}.nh.tim{color:var(--tim)}.nh.xam{color:var(--muted)}
.tn-goi-y{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.tn-goi-y button,.ct-mau button,.ct-mau-ds button{border:1px solid #c9d8f3;background:#fff;color:var(--chinh-dam);border-radius:999px;padding:6px 12px;font-size:12.5px;cursor:pointer;text-align:left}
.tn-goi-y button:hover,.ct-mau button:hover,.ct-mau-ds button:hover{background:var(--chinh-nhat);border-color:var(--chinh)}
.dang-go{display:flex;gap:4px;padding:14px}.dang-go i{width:7px;height:7px;border-radius:50%;background:#9fb3d1;animation:nhay 1s infinite}.dang-go i:nth-child(2){animation-delay:.15s}.dang-go i:nth-child(3){animation-delay:.3s}
@keyframes nhay{0%,80%,100%{opacity:.3;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}
.ct-chao{margin:auto;text-align:center;max-width:620px;padding:20px}
.ct-chao-av{width:64px;height:64px;border-radius:50%;background:var(--chinh-nhat);display:flex;align-items:center;justify-content:center;font-size:32px;margin:0 auto 8px}
.ct-chao h2{margin:0;font:600 22px var(--fh)}.ct-chao p{color:var(--muted);margin:6px 0 16px}
.ct-mau{display:grid;grid-template-columns:1fr 1fr;gap:12px;text-align:left}.ct-mau>div{display:flex;flex-direction:column;gap:6px}.ct-mau small{font-weight:700;color:var(--muted);font-size:12px}
.ct-mau button{border-radius:10px}
.ct-nhap{display:flex;gap:8px;padding:12px 16px;background:var(--trang);border-top:1px solid var(--line);align-items:flex-end}
.ct-nhap textarea{flex:1;resize:none;border:1px solid var(--line);border-radius:12px;padding:10px 14px;font:14px/1.45 var(--f);max-height:160px}
.ct-nhap textarea:focus{outline:3px solid var(--chinh-nhat);border-color:var(--chinh)}
.ct-nhap .nut{width:44px;height:42px;border-radius:12px;font-size:16px}
.ct-phai{border-left:1px solid var(--line);overflow-y:auto;padding:12px 14px;min-width:0}
.ct-tabs{display:grid;grid-template-columns:1fr 1fr;background:var(--paper);border-radius:10px;padding:3px;margin-bottom:12px}
.ct-tabs button{border:0;background:none;padding:7px;border-radius:8px;font-weight:600;color:var(--muted);cursor:pointer}.ct-tabs button.on{background:#fff;color:var(--chinh);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.ct-dl{margin:0}.ct-dl dt{font-size:12px;color:var(--muted);margin-top:12px}.ct-dl dd{margin:3px 0 0;font-weight:600}.ct-dl dd small{display:block;font-weight:400;color:var(--muted)}
.the-sp{display:inline-block;background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:1px 7px;font-size:12px;margin:2px 4px 2px 0}
.ct-mau-ds details{border-bottom:1px solid var(--line);padding:8px 0}.ct-mau-ds summary{cursor:pointer;font-weight:600}
.ct-mau-ds button{display:block;width:100%;border-radius:10px;margin-top:6px}

/* ---------- Màn hình dùng lại từ website (js/40) ---------- */
.tk40 .tk-ac{display:block}.tk40 .tk-ac>.ac-nav{display:none}.tk40 .ac-main{display:flex;flex-direction:column;gap:14px}
.tk40 .btn{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:8px;padding:7px 13px;font:600 13px var(--f);cursor:pointer;text-decoration:none;display:inline-block}
.tk40 .btn:hover{border-color:var(--chinh)}.tk40 .btn.fill{background:var(--chinh);border-color:var(--chinh);color:#fff}.tk40 .btn.sm{padding:4px 10px;font-size:12px}
.tk40 .btn.danger{border-color:var(--danger);color:var(--danger)}.tk40 .btn:disabled{opacity:.6}
.tk40 .small{font-size:12.5px;color:var(--muted)}.tk40 .row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.tk40 .lnk{color:var(--chinh);cursor:pointer}
.tk40 .rt-sum{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:10px}
.tk40 .rt-sum>b:first-child{font:600 15px var(--fh)}
.tk40 .fgrid{display:grid;grid-template-columns:1fr 1fr;gap:10px 14px}
.tk40 .tk-bar>b{font:600 18px var(--fh)}
.tk40 .tk-tbl-wrap{border-radius:12px}
.tk40 .tk-inline{background:#f5f9ff;border-color:#b9cff3}
.tk40 .lg{display:flex;justify-content:center;padding:30px 0}.tk40 .lg-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;display:flex;flex-direction:column;gap:12px;max-width:440px}
.tk40 .title{font:600 20px var(--fh)}.tk40 .center{text-align:center}
.tk40 details summary{cursor:pointer}

/* ---------- Điện thoại / máy tính bảng ---------- */
@media (max-width:1100px){.chat{grid-template-columns:250px 1fr}.ct-phai{display:none}.ct-an-phai{display:none}.hai-cot{grid-template-columns:1fr}}
@media (max-width:900px){
  .dn{grid-template-columns:1fr}.dn-trai{padding:28px 20px}.dn-trai h1{font-size:22px}.dn-trai ul{display:none}
  .tb{gap:10px;padding:0 10px}.tb-menu{display:block}.tb-nav{display:none}.tb-nguoi>span:not(.tk-av){display:none}.tb-nguoi{padding:3px}.tb-dem{display:none}
  .sb{position:fixed;top:58px;bottom:0;left:0;z-index:20;transform:translateX(-105%);transition:transform .2s}
  body.mo-menu .sb{transform:none}
  .nd{padding:14px 14px 30px}
  .chat{grid-template-columns:1fr;grid-template-rows:auto 1fr}
  .ct-trai{border-right:0;border-bottom:1px solid var(--line);max-height:150px}.ct-trai-dau{padding:8px 12px 4px}.ct-tim{display:none}
  .ct-ds{display:flex;gap:6px;overflow-x:auto;padding:0 8px 8px}.ht-o{min-width:220px;grid-template-columns:30px 1fr}.ht-o small{display:none}.ht-av{width:30px;height:30px}
  .ct-mau{grid-template-columns:1fr}.goi{grid-template-columns:1fr}.luoi-hm{grid-template-columns:1fr}
  .tk40 .fgrid,.tk40 .fgrid.g3{grid-template-columns:1fr}.tk40 .tk-cards{grid-template-columns:1fr 1fr}.tk40 .tk-nhom{grid-template-columns:1fr 1fr}
}
.nhung{position:relative}.nhung-cho{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--muted);background:var(--nen)}
.nd .ket-noi h3{display:none}.nd .ket-noi{max-width:640px}