:root{
  --ink:#131C33; --ink2:#1E2B4D; --paper:#F3F5FA; --card:#FFFFFF;
  --line:#E2E7F0; --line2:#CFD7E6; --muted:#6B7690; --text:#1B2440;
  --red:#D62828; --red-s:#FDECEC; --gold:#E9960B; --gold-s:#FEF4E2;
  --green:#0E9F76; --green-s:#E6F6F1; --blue:#3B63D9; --blue-s:#ECF0FE;
  --sang:#E08A1E; --chieu:#5B6FD6;
  --r:12px; --r-s:8px;
  --sh:0 1px 2px rgba(19,28,51,.05), 0 4px 14px rgba(19,28,51,.06);
  --sh-lg:0 12px 40px rgba(19,28,51,.18);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  background:var(--paper); color:var(--text); font-size:14px; line-height:1.5;
  -webkit-font-smoothing:antialiased; -webkit-tap-highlight-color:transparent;
}
input,select,textarea,button{font-family:inherit;font-size:14px;color:inherit}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
.hide{display:none !important}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:#C3CBDA;border-radius:9px}
::-webkit-scrollbar-track{background:transparent}

/* ---------- generic controls ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:9px 14px;border:1px solid var(--line2);background:#fff;border-radius:var(--r-s);
  font-weight:600;cursor:pointer;transition:.15s;white-space:nowrap;
}
.btn:hover{background:#F7F9FC;border-color:#B7C2D6}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
.btn.pri{background:var(--ink);border-color:var(--ink);color:#fff}
.btn.pri:hover{background:var(--ink2);border-color:var(--ink2)}
.btn.red{background:var(--red);border-color:var(--red);color:#fff}
.btn.red:hover{filter:brightness(1.07)}
.btn.grn{background:var(--green);border-color:var(--green);color:#fff}
.btn.grn:hover{filter:brightness(1.07)}
.btn.sm{padding:6px 10px;font-size:12.5px}
.btn.xs{padding:3px 8px;font-size:12px;font-weight:600}
.btn.ghost{background:transparent;border-color:transparent}
.btn.ghost:hover{background:#EDF1F7}
.btn:disabled{opacity:.45;cursor:not-allowed}
.inp,select.inp,textarea.inp{
  width:100%;padding:9px 11px;border:1px solid var(--line2);border-radius:var(--r-s);
  background:#fff;outline:none;transition:.15s;font-size:16px;
}
@media(min-width:768px){ .inp,select.inp,textarea.inp{font-size:14px} }
.inp:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-s)}
label.lbl{display:block;font-size:12px;font-weight:700;color:var(--muted);
  text-transform:uppercase;letter-spacing:.04em;margin-bottom:5px}
.field{margin-bottom:13px}
.chip{display:inline-flex;align-items:center;gap:5px;padding:2px 9px;border-radius:999px;
  font-size:11.5px;font-weight:700;letter-spacing:.02em}
.chip.sang{background:#E3F3EA;color:#0A6B4A}
.chip.chieu{background:#FCEBD9;color:#9A5209}
.chip.gray{background:#EDF0F5;color:var(--muted)}
.chip.grn{background:var(--green-s);color:#0A7256}
.chip.red{background:var(--red-s);color:#A81D1D}
.chip.gold{background:var(--gold-s);color:#8A5A03}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh)}
.card-h{padding:14px 16px;border-bottom:1px solid var(--line);display:flex;
  align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.card-h h3{font-size:14.5px;font-weight:700}
.card-b{padding:16px}
.muted{color:var(--muted)}
.empty{padding:44px 20px;text-align:center;color:var(--muted)}
.empty b{display:block;color:var(--text);font-size:15px;margin-bottom:4px}

/* ---------- shell ---------- */
#app{display:none;min-height:100vh;flex-direction:column}
.top{
  background:var(--ink);color:#fff;position:sticky;top:0;z-index:40;
  padding:0 16px;padding-top:env(safe-area-inset-top);
  display:flex;align-items:center;gap:12px;height:calc(58px + env(safe-area-inset-top));
}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.flagmark{
  width:32px;height:32px;border-radius:8px;flex:0 0 32px;
  background:linear-gradient(135deg,var(--red) 0%,#9E1B1B 100%);
  display:grid;place-items:center;box-shadow:0 3px 10px rgba(214,40,40,.4)
}
.flagmark svg{width:18px;height:18px}
.brand-t{min-width:0}
.brand-t b{display:block;font-size:14px;font-weight:700;letter-spacing:-.01em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-t span{display:block;font-size:11px;color:#93A0BC;white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis}
.top-sp{flex:1}
.who{display:flex;align-items:center;gap:9px}
.who .av{width:32px;height:32px;border-radius:50%;background:#2C3A5E;color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:12.5px}
.who-t{text-align:right;line-height:1.25}
.who-t b{display:block;font-size:12.5px;font-weight:600}
.who-t span{display:block;font-size:10.5px;color:#93A0BC}
@media(max-width:640px){.who-t{display:none}}
.logout{background:transparent;border:1px solid #33405F;color:#B9C4DA;
  padding:7px 10px;border-radius:8px;cursor:pointer;font-weight:600;font-size:12.5px}
.logout:hover{background:#22304F;color:#fff}

nav.tabs{
  background:#fff;border-bottom:1px solid var(--line);position:sticky;
  top:calc(58px + env(safe-area-inset-top));z-index:35;
  display:flex;gap:2px;padding:0 10px;overflow-x:auto;scrollbar-width:none
}
nav.tabs::-webkit-scrollbar{display:none}
nav.tabs button{
  background:none;border:none;padding:13px 13px 11px;cursor:pointer;font-weight:600;
  color:var(--muted);border-bottom:2.5px solid transparent;white-space:nowrap;
  display:flex;align-items:center;gap:6px;font-size:13.5px
}
nav.tabs button:hover{color:var(--text)}
nav.tabs button.on{color:var(--red);border-bottom-color:var(--red)}
main{flex:1;padding:16px;padding-bottom:calc(30px + env(safe-area-inset-bottom));
  max-width:1360px;width:100%;margin:0 auto}
.view{display:none;animation:fade .18s ease}
.view.on{display:block}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){*{animation:none !important;transition:none !important}}

/* ---------- toolbar ---------- */
.bar{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end;
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:12px 14px;box-shadow:var(--sh);margin-bottom:14px}
.bar .g{display:flex;flex-direction:column;gap:4px;min-width:130px}
.bar .g > span{font-size:11px;font-weight:700;color:var(--muted);
  text-transform:uppercase;letter-spacing:.04em}
.bar .sp{flex:1}
.bar select,.bar input{padding:8px 10px;border:1px solid var(--line2);
  border-radius:var(--r-s);background:#fff;font-size:14px}

/* ---------- score grid ---------- */
.tw{overflow-x:auto;border-radius:var(--r);border:1px solid var(--line);background:#fff}
table{border-collapse:separate;border-spacing:0;width:100%;font-size:13.5px}
th,td{padding:8px 9px;text-align:center;border:1px solid #BFC9D9}
th{background:#F7F9FC;font-weight:700;font-size:11px;color:#4A5670;
  text-transform:uppercase;letter-spacing:.03em;position:sticky;top:0;z-index:5;
  border-bottom:2px solid #9AA7BD;line-height:1.25}
td.l,th.l{text-align:left}
.sticky-l{position:sticky;left:0;z-index:6;background:#fff;
  box-shadow:1px 0 0 var(--line)}
th.sticky-l{z-index:8;background:#F7F9FC}
tr.tot td{background:#F7F9FC;font-weight:700;border-top:1.5px solid var(--line2)}
tr.tot td.sticky-l{background:#F7F9FC}
.sc{width:60px;padding:6px 4px;text-align:center;border:1px solid var(--line2);
  border-radius:6px;font-weight:700;font-size:15px;background:#fff;
  font-variant-numeric:tabular-nums;outline:none}
.sc:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-s)}
.sc.full{background:var(--green-s);border-color:#B6E3D5;color:#0A7256}
.sc.cut{background:var(--red-s);border-color:#F3C3C3;color:#A81D1D}
.sc[readonly]{background:#F5F7FA;color:var(--muted);cursor:default;border-color:var(--line)}
.dtot{font-weight:800;font-size:16px;font-variant-numeric:tabular-nums}
.wtot{font-weight:800;font-size:18px;color:var(--red);font-variant-numeric:tabular-nums}
.nt{width:100%;min-width:190px;padding:6px 8px;border:1px solid var(--line2);
  border-radius:6px;font-size:13px;background:#fff;outline:none;resize:vertical;
  min-height:34px;text-align:left}
.nt:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-s)}
.nt[readonly]{background:#F5F7FA;color:var(--muted)}
.daycell{display:flex;flex-direction:column;align-items:flex-start;gap:1px}
.daycell b{font-size:13.5px}
.daycell small{color:var(--muted);font-size:11px;font-variant-numeric:tabular-nums}

/* ---------- ranking ---------- */
.rank2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:1000px){.rank2{grid-template-columns:1fr}}
.grp-h{display:flex;align-items:center;gap:9px;padding:13px 16px;
  border-bottom:1px solid var(--line);color:#fff;border-radius:var(--r) var(--r) 0 0}
.grp-h.sang{background:linear-gradient(100deg,#1AB265,#128F4E)}  /* xanh tươi */
.grp-h.chieu{background:linear-gradient(100deg,#F5972E,#DD7A14)} /* cam tươi */
.grp-h h3{font-size:14px;font-weight:800;letter-spacing:.03em}
.grp-h .n{margin-left:auto;font-size:12px;opacity:.85;font-weight:600}
.rk{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:8px;
  font-weight:800;font-size:13px;background:#EDF0F5;color:#4A5670;
  font-variant-numeric:tabular-nums}
.rk.r1{background:linear-gradient(135deg,#F5C445,#DE9A06);color:#4A3000;
  box-shadow:0 2px 8px rgba(222,154,6,.35)}
.rk.r2{background:#DDE3EC;color:#3E4A63}
.rk.r3{background:#F0D9C4;color:#7A4A1E}
.rk.last{background:var(--red-s);color:#A81D1D}
tr.win td{background:linear-gradient(90deg,#FEF9EC,#fff)}
.vp{font-size:12px;color:var(--muted);text-align:left;line-height:1.45;
  max-width:340px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden}

/* ---------- stat cards ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:14px}
.st{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px;
  box-shadow:var(--sh);position:relative;overflow:hidden}
.st::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--line2)}
.st.a::before{background:var(--gold)} .st.b::before{background:var(--green)}
.st.c::before{background:var(--blue)} .st.d::before{background:var(--red)}
.st span{display:block;font-size:11px;font-weight:700;color:var(--muted);
  text-transform:uppercase;letter-spacing:.04em;margin-bottom:5px}
.st b{display:block;font-size:22px;font-weight:800;font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;line-height:1.15}
.st small{display:block;color:var(--muted);font-size:12px;margin-top:2px}
.spark{height:26px;width:88px}
.spark path{fill:none;stroke:var(--red);stroke-width:1.8;stroke-linejoin:round;stroke-linecap:round}
.spark circle{fill:var(--red)}

/* ---------- admin ---------- */
.sub{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.sub button{padding:7px 13px;border:1px solid var(--line2);background:#fff;
  border-radius:999px;cursor:pointer;font-weight:600;font-size:13px;color:var(--muted)}
.sub button.on{background:var(--ink);border-color:var(--ink);color:#fff}
.rowform{display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end}
.rowform .f{flex:1;min-width:120px}
.act{display:flex;gap:5px;justify-content:flex-end}
.iconb{width:28px;height:28px;border:1px solid var(--line2);background:#fff;border-radius:7px;
  display:grid;place-items:center;cursor:pointer;color:var(--muted)}
.iconb:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-s)}
.iconb.dg:hover{border-color:var(--red);color:var(--red);background:var(--red-s)}
.iconb svg{width:14px;height:14px}

/* ---------- login / setup ---------- */
.gate{min-height:100vh;display:grid;place-items:center;padding:20px;
  background:
    radial-gradient(1100px 480px at 12% -8%, #22345E 0%, transparent 62%),
    radial-gradient(800px 420px at 105% 105%, #6B1414 0%, transparent 60%),
    var(--ink);
}
.gate-box{width:100%;max-width:408px}
.gate-hero{text-align:center;margin-bottom:20px;color:#fff}
.gate-hero .flagmark{width:52px;height:52px;flex:0 0 52px;border-radius:14px;margin:0 auto 14px}
.gate-hero .flagmark svg{width:28px;height:28px}
.gate-hero h1{font-size:22px;font-weight:800;letter-spacing:-.02em}
.gate-hero p{color:#98A5C2;font-size:13px;margin-top:4px}
.gate-card{background:#fff;border-radius:16px;padding:22px;box-shadow:var(--sh-lg)}
.gate-card h2{font-size:16px;font-weight:700;margin-bottom:3px}
.gate-card > p.s{color:var(--muted);font-size:12.5px;margin-bottom:16px}
.err{background:var(--red-s);color:#A81D1D;border:1px solid #F3C3C3;padding:9px 11px;
  border-radius:var(--r-s);font-size:13px;font-weight:600;margin-bottom:12px}
.gate-foot{text-align:center;color:#7C89A8;font-size:11.5px;margin-top:16px;line-height:1.6}

/* ---------- modal / toast ---------- */
.ov{position:fixed;inset:0;background:rgba(12,18,34,.55);backdrop-filter:blur(3px);
  z-index:90;display:grid;place-items:center;padding:16px;overflow-y:auto}
.mo{background:#fff;border-radius:14px;width:100%;max-width:520px;box-shadow:var(--sh-lg);
  max-height:92vh;display:flex;flex-direction:column}
.mo.wide{max-width:760px}
.mo-h{padding:15px 18px;border-bottom:1px solid var(--line);display:flex;
  align-items:center;justify-content:space-between;gap:10px}
.mo-h h3{font-size:15.5px;font-weight:700}
.mo-b{padding:18px;overflow-y:auto}
.mo-f{padding:13px 18px;border-top:1px solid var(--line);display:flex;
  gap:8px;justify-content:flex-end;background:#FAFBFD;border-radius:0 0 14px 14px}
.x{background:none;border:none;font-size:22px;color:var(--muted);cursor:pointer;
  line-height:1;padding:2px 6px;border-radius:6px}
.x:hover{background:#EDF1F7;color:var(--text)}
#toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:120;
  display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none;
  padding-bottom:env(safe-area-inset-bottom)}
.ts{background:var(--ink);color:#fff;padding:10px 16px;border-radius:999px;
  font-size:13.5px;font-weight:600;box-shadow:var(--sh-lg);animation:up .22s ease;
  display:flex;align-items:center;gap:8px;max-width:90vw}
.ts.ok{background:var(--green)} .ts.no{background:var(--red)}
@keyframes up{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
#load{position:fixed;inset:0;background:rgba(255,255,255,.72);z-index:200;
  display:none;place-items:center}
#load.on{display:grid}
.spin{width:34px;height:34px;border:3px solid var(--line2);border-top-color:var(--red);
  border-radius:50%;animation:sp .7s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.vio-row{display:flex;gap:7px;align-items:center;margin-bottom:7px}
.vio-row input{flex:1;padding:7px 9px;border:1px solid var(--line2);border-radius:7px;outline:none}
.vio-row input:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-s)}
.hint{font-size:12px;color:var(--muted);margin-top:5px;line-height:1.5}
.pill-list{display:flex;flex-wrap:wrap;gap:5px}
.pill{background:#EDF1F7;border:1px solid var(--line);padding:2px 8px;border-radius:999px;
  font-size:11.5px;font-weight:600;color:#3E4A63}
.chk{display:flex;align-items:center;gap:7px;padding:6px 9px;border:1px solid var(--line);
  border-radius:8px;cursor:pointer;font-size:13px;font-weight:600;background:#fff}
.chk:hover{background:#F5F8FC}
.chk input{width:15px;height:15px;accent-color:var(--red);cursor:pointer}
.chk.on{background:var(--red-s);border-color:#F0BEBE;color:#A81D1D}
.grid-chk{display:grid;grid-template-columns:repeat(auto-fill,minmax(84px,1fr));gap:6px;
  max-height:230px;overflow-y:auto;padding:3px}

/* ---------- account menu (header) ---------- */
.acct{position:relative}
.acct-btn{display:flex;align-items:center;gap:9px;background:#22304F;border:1px solid #33405F;
  color:#fff;padding:5px 9px 5px 13px;border-radius:999px;cursor:pointer;transition:.15s}
.acct-btn:hover{background:#293a5e;border-color:#3d4c70}
.acct-btn .who-t{text-align:right;line-height:1.2}
.acct-btn .who-t b{display:block;font-size:12.5px;font-weight:600}
.acct-btn .who-t span{display:block;font-size:10.5px;color:#9fb0cf}
.acct-btn .av{width:30px;height:30px;border-radius:50%;background:var(--ink);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:12.5px;flex:0 0 30px;
  box-shadow:0 0 0 1px rgba(255,255,255,.18) inset}
.acct-caret{color:#9fb0cf}
@media(max-width:640px){.acct-btn .who-t{display:none}}
.acct-menu{position:absolute;right:0;top:calc(100% + 8px);width:240px;background:#fff;color:var(--text);
  border:1px solid var(--line);border-radius:12px;box-shadow:var(--sh-lg);padding:6px;z-index:60;
  animation:fade .14s ease}
.acct-menu.hide{display:none}
.acct-head{padding:10px 12px 8px}
.acct-head b{display:block;font-size:14px;font-weight:700}
.acct-head span{display:block;font-size:12px;color:var(--muted);margin-top:1px}
.acct-sep{border-top:1px solid var(--line);margin:2px 2px 4px}
.acct-item{display:flex;align-items:center;gap:11px;width:100%;padding:10px 12px;border:none;
  background:none;cursor:pointer;border-radius:8px;font-weight:600;font-size:13.5px;color:var(--text);text-align:left}
.acct-item:hover{background:#F1F5FA}
.acct-item svg{width:17px;height:17px;color:var(--ink2);flex:0 0 17px}

/* ---------- support card ---------- */
.support-card{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#fff}
.support-name{display:block;font-size:16px;font-weight:800;margin-bottom:11px}
.support-row{display:flex;align-items:center;gap:10px;margin-top:9px;font-size:14px}
.support-row svg{width:17px;height:17px;flex:0 0 17px}
.support-row a{color:inherit;text-decoration:none}
.support-row a:hover{text-decoration:underline}
.support-row.loc svg{color:var(--green)}
.support-row.tel svg{color:var(--red)}
.support-row.tel a{color:var(--red);font-weight:800;letter-spacing:.02em}
.support-row.mail svg{color:var(--muted)}

/* ---------- license warning banner ---------- */
.licbar{display:flex;align-items:center;gap:12px;background:var(--gold-s);border:1px solid #F3D9A6;
  color:#8A5A03;padding:10px 14px;border-radius:var(--r);font-size:13.5px;font-weight:600;margin-bottom:14px}
.licbar b{color:#6b4602}
.licbar button{margin-left:auto;background:none;border:none;font-size:20px;line-height:1;color:#8A5A03;
  cursor:pointer;padding:0 4px;border-radius:6px}
.licbar button:hover{background:#F3E2BE}

/* ---------- group-colored table headers (Sáng=xanh lá, Chiều=cam) ---------- */
table.g-sang thead th{background:#159A55;color:#fff;border-color:#0F7E44;border-bottom:2px solid #0C6B3A}
table.g-chieu thead th{background:#E5851F;color:#fff;border-color:#C46F13;border-bottom:2px solid #A85E0F}
table.g-sang thead th.sticky-l{background:#159A55;color:#fff}
table.g-chieu thead th.sticky-l{background:#E5851F;color:#fff}

/* ---------- class name colors by session ---------- */
.cls-sang{color:#0A7256}
.cls-chieu{color:#C0261F}

/* ---------- keyword highlight ---------- */
mark{background:#FFE39B;color:#5A3E00;padding:0 1px;border-radius:2px}

/* ---------- violation content in red ---------- */
.vio-c{color:var(--red);font-weight:600}
/* danh sách "Lớp / HS vi phạm nhiều" ở trang Vi phạm */
.viorank{display:flex;flex-direction:column;gap:7px}
.viorank-row{display:flex;align-items:center;gap:10px}
.viorank-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.viorank-n{font-weight:800;color:var(--red);font-variant-numeric:tabular-nums;font-size:13px;white-space:nowrap}
/* nhãn thứ cạnh nhãn Từ ngày / Đến ngày trong modal tuần */
.wd{margin-left:6px;font-weight:700;color:var(--blue);font-size:11px;text-transform:none;letter-spacing:0}

/* ---------- Tiêu chí: cột Tối đa (vừa số 4 chữ số) + cột Thao tác gọn ---------- */
.tc-table .tc-max{padding:5px 6px;text-align:center}   /* khoảng cách số tới mép cột như các cột khác */
.tc-table .tc-act{display:flex;gap:4px;justify-content:center;align-items:center}
/* Điện thoại: thu nhỏ đệm + nút để nhường chỗ cho cột Tiêu chí */
@media(max-width:560px){
  .tc-table th,.tc-table td{padding:7px 4px;font-size:12.5px}
  .tc-table .tc-act{gap:3px}
  .tc-table .tc-act .iconb{width:26px;height:26px}
  .tc-table .tc-act .iconb svg{width:13px;height:13px}
}

/* ---------- in-header table search ---------- */
.tsearch{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line2);
  border-radius:999px;padding:5px 11px}
.tsearch:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-s)}
.tsearch svg{width:14px;height:14px;color:var(--muted);flex:0 0 14px}
.tsearch input{border:none;outline:none;font-size:13px;width:160px;background:transparent;color:inherit}
@media(max-width:520px){.tsearch input{width:110px}}

/* ---------- Quản trị: menu con ngang (kiểu menu chính, không icon) ---------- */
.qtrow{background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);
  display:flex;gap:2px;padding:0 8px;overflow-x:auto;scrollbar-width:none;margin-bottom:14px}
.qtrow::-webkit-scrollbar{display:none}
.qtrow button{background:none;border:none;padding:13px 15px 11px;cursor:pointer;font-weight:600;
  color:var(--muted);border-bottom:2.5px solid transparent;white-space:nowrap;font-size:13.5px}
.qtrow button:hover{color:var(--text)}
.qtrow button.on{color:var(--red);border-bottom-color:var(--red)}

/* ---------- sort buttons in table headers ---------- */
.sortbtn{background:none;border:none;cursor:pointer;color:inherit;opacity:.65;padding:0 2px;margin-left:2px;
  vertical-align:middle;line-height:1;font-size:10px}
.sortbtn:hover{opacity:1}
.sortbtn.on{opacity:1}

/* select màu theo buổi (cột chuyển nhóm) */
select.cls-sang{color:#0A7256;font-weight:600}
select.cls-chieu{color:#C0261F;font-weight:600}