/* ===== Theme "Gemtech v4" — EduAdmin BS5 main-semidark, trị số chuẩn từ template =====
   primary #0052cc · danger #ff562f · success #04a08b · info #00baff · warning #ff9920
   body #fafbfd · text #172b4c · box shadow 0 0 30px rgba(82,63,105,.05) · radius box 10 / btn 5
   Load SAU app.css (đè UI v3 Quiz.com). */
@import url('fonts.css');
@import url('remixicon-min.css'); /* Remix Icon (line) thay icomoon duotone */
:root{
  --primary:#0052cc; --primary-d:#003e99; --primary-h:#1a66d1;
  --primary-l:#e1eaf9; --primary-l2:#f0f5fc; --primary-border:#b3cdf0;
  --green:#04a08b; --green-d:#036e60; --green-l:#d1f5f0; --green-b:#9fd9d1;
  --red:#ff562f; --red-d:#fb2f00; --red-l:#ffeae5; --red-b:#ffc3b3;
  --amber:#ff9920; --amber-l:#fff2e2;
  --info:#00baff; --info-l:#d1f3ff;
  --petrol:#1b3a70; --petrol-d:#172b4c; --petrol-dd:#0c1a32; --petrol-lt:#8cade4;
  --cyan:#0052cc; --yellow:#ffc36d; --cream:#ffffff;
  --bg:#fafbfd; --card:#fff;
  --line:rgba(72,94,144,.16); --line2:#d1d3e0;
  --text:#172b4c; --muted:#b5b5c3; --muted2:#52617e;
  --radius:5px; --radius-lg:10px;
  --shadow:0 0 30px 0 rgba(82,63,105,.05);
  --shadow-lg:0 14px 26px -12px rgba(0,0,0,.1),0 4px 23px 0 rgba(0,0,0,.1),0 8px 10px -5px rgba(0,0,0,.1);
}
body{font-family:'Be Vietnam Pro',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.5}
h1,h2,h3,h4{font-family:'Be Vietnam Pro','Be Vietnam Pro',sans-serif;font-weight:400;color:var(--text)}
b,strong{font-weight:600}
a{color:#2f579a}
a:hover{color:var(--primary)}

/* ---- Sidebar semidark: nền #0c1a32, logo-box #172b4c cao 80px, active border-left ---- */
.sidebar{background:#0c1a32;border-right:0;box-shadow:none}
.sidebar .brand{background:#172b4c;height:80px;padding:0 18px;display:flex;align-items:center;border-bottom:0}
.sidebar .brand img{height:34px}
.nav{padding:15px 0 10px}
.nav-group{color:#b5b5c3;opacity:.5;font-weight:400;font-size:12px;letter-spacing:.05em;margin:15px 25px 5px;text-transform:uppercase}
.sidebar .nav-item{color:#b5b5c3;font-weight:400;font-size:14.5px;border-radius:0;border-left:5px solid transparent;padding:10px 20px;margin:0}
.sidebar .nav-item .ico,.sidebar .nav-item .ico svg{width:21px;height:21px}
.sidebar .nav-item .ico{margin-right:8px;opacity:.85}
.sidebar .nav-item:hover{background:rgba(255,255,255,.05);color:#fff;transform:none}
.sidebar .nav-item.active{background:rgba(255,255,255,.04);border-left-color:var(--primary);color:#fff;font-weight:500;box-shadow:none}
/* sidebar footer: hàng icon ngang chia đều, ẩn nhãn chữ */
.sidebar-foot{border-top:1px solid rgba(255,255,255,.08);padding:0;display:flex}
.sidebar-foot .nav-item{flex:1;justify-content:center;padding:12px 0;border-left:0;font-size:18px;margin:0}
.sidebar-foot .nav-item span:last-child{display:none}
.sidebar-foot .nav-item .ico{margin:0}
.sidebar-foot .nav-item.active{border-left:0;background:rgba(255,255,255,.06)}
/* Công tắc chế độ Học viên / Giáo viên */
.mode-sw{display:flex;gap:4px;margin:0 14px 14px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:4px}
.mode-sw form{flex:1;display:flex;margin:0}
.mode-sw button{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;border:0;background:transparent;color:#aab8d4;font-family:inherit;font-weight:600;font-size:12.5px;padding:8px 6px;border-radius:7px;cursor:pointer;transition:background .2s,color .2s}
.mode-sw button i{font-size:16px;line-height:1}
.mode-sw button.on{background:var(--primary);color:#fff;box-shadow:0 4px 12px -4px rgba(0,82,204,.6)}
.mode-sw button:not(.on):hover{color:#fff;background:rgba(255,255,255,.07)}
@media(min-width:861px){
  html.sb-mini .mode-sw{flex-direction:column;margin:0 9px 10px;padding:3px;gap:3px}
  html.sb-mini .mode-sw button span{display:none}
  html.sb-mini .mode-sw button{padding:9px 0;gap:0}
}
.nav::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14)}
@media(max-width:860px){.sidebar.open{box-shadow:0 0 0 100vmax rgba(12,26,50,.5),2px 0 18px rgba(0,0,0,.35)}}

/* ---- Topbar: cao 80px, nền = body, chip trắng 45×45 shadow box ---- */
.topbar{height:80px;background:var(--bg);backdrop-filter:none;border-bottom:0;gap:10px;padding:0 24px}
.topbar-title{display:none}
.hamb{display:inline-block;width:45px;height:45px;border-radius:5px;background:#fff;box-shadow:var(--shadow);color:var(--text);font-size:18px;line-height:1}
.gx-chip{width:45px;height:45px;border-radius:5px;background:#fff;box-shadow:var(--shadow);display:grid;place-items:center;font-size:17px;border:0;cursor:pointer;color:var(--text);padding:0}
.gx-chip:hover{color:var(--primary)}
.topsearch{margin-left:auto;flex:0 1 250px;order:5}
.topsearch input{height:45px;background:#fff;border:0;border-radius:5px;box-shadow:var(--shadow);font-weight:400;color:var(--text);padding:0 20px}
.topsearch input:focus{border:0;background:#fff;box-shadow:var(--shadow),0 0 0 2px var(--primary-l)}
.topbar-right{margin-left:0;order:6;gap:10px}
.bell{width:45px;height:45px;border-radius:5px;background:#fff;box-shadow:var(--shadow);display:grid;place-items:center;font-size:17px;padding:0;border:0}
.bell:hover{color:var(--primary)}
.bell-n{background:var(--red);top:4px;right:4px}
.user-chip{background:#fff;border-radius:5px;box-shadow:var(--shadow);padding:5px 12px 5px 5px;height:45px}
.user-chip:hover{background:#fff;color:var(--primary)}
.avatar{width:35px;height:35px;border-radius:5px;background:#172b4c;box-shadow:none;font-weight:500}
.uname{font-weight:500}
/* dropdown user (EduAdmin dropdown-menu) */
.gx-ud{position:relative}
.gx-ud-menu{display:none;position:absolute;right:0;top:52px;background:#fff;border:1px solid #ccc;border-radius:10px;min-width:190px;box-shadow:var(--shadow);z-index:60;overflow:hidden;padding:0}
.gx-ud.open .gx-ud-menu{display:block}
.gx-ud-menu a{display:block;color:var(--text);padding:10px 15px;margin:5px 0;font-weight:400;font-size:14px}
.gx-ud-menu a:hover{background:#f3f6f9;color:var(--text)}
.gx-ud-menu .dv{border-top:1px solid var(--line);margin:2px 0}

/* ---- Breadcrumb + footer (chèn từ layout, chỉ theme này có markup) ---- */
.gx-bc{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted2);margin:0 0 16px}
.gx-bc a{color:var(--muted2)}
.gx-bc a:hover{color:var(--primary)}
.gx-bc .sep{color:#3b6dc1}
.gx-bc .cur{color:var(--text);font-weight:500}
.gx-footer{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:18px 0 6px;margin-top:18px;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted2)}
.gx-footer .sp{flex:1}
.gx-footer a{color:#2f579a;font-weight:500}

/* ---- Page head (các trang trong) như box ---- */
.page-head{background:#fff;border:0;border-radius:10px;padding:1.1rem 1.5rem 1.1rem 1.7rem;box-shadow:var(--shadow);position:relative;overflow:hidden}
.page-head::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:linear-gradient(180deg,#0052cc,#00baff)}
.page-head h1{color:var(--text);font-size:19px;font-weight:500}

/* ---- Box / card / stat / table ---- */
.card{border:0;border-radius:10px;box-shadow:var(--shadow)}
.card-pad{padding:1.5rem}
.stat{border:0;border-radius:10px;box-shadow:var(--shadow);padding:1.5rem}
.stat:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.stat .num{font-weight:600;color:var(--text);font-family:'Be Vietnam Pro',sans-serif}
.stat .lbl{color:#8d97ad}
.stat .ico{background:var(--primary-l);border-radius:10px}
.card-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.grid-4 .stat:nth-child(1) .ico{background:var(--primary-l)}
.grid-4 .stat:nth-child(2) .ico{background:var(--amber-l)}
.grid-4 .stat:nth-child(3) .ico{background:var(--green-l)}
.grid-4 .stat:nth-child(4) .ico{background:var(--info-l)}
.table{border:0;border-radius:10px;box-shadow:var(--shadow)}
.table th,.table td{padding:1rem;vertical-align:middle;border-bottom-color:var(--line)}
.table th{background:#fff;color:#8d97ad;font-weight:500;text-transform:none;font-size:13px}
.table tbody tr:nth-child(even) td{background:#fff}
.table tbody tr:hover td{background:#fafbfd}

/* ---- Buttons: radius 5, hover shadow 3 lớp như template ---- */
.btn{border:1px solid transparent;border-radius:5px;font-weight:500;padding:8px 16px;background:var(--primary);color:#fff;box-shadow:none;transition:all .3s ease-in-out}
.btn:hover{transform:none;background:var(--primary-d);border-color:var(--primary-d);box-shadow:var(--shadow-lg)}
.btn:active{transform:none;box-shadow:none}
.btn-ghost{background:#fff;color:var(--muted2);border:1px solid var(--line2);box-shadow:none;padding:7px 15px}
.btn-ghost:hover{background:#fff;color:var(--primary);border-color:var(--primary);box-shadow:var(--shadow-lg)}
.btn-danger{background:var(--red);border-color:var(--red)}
.btn-danger:hover{background:var(--red-d);border-color:var(--red-d)}
.btn-success{background:var(--green);border-color:var(--green)}
.btn-success:hover{background:var(--green-d);border-color:var(--green-d)}
.btn-sm{padding:.375rem .75rem;font-size:13px;border-radius:5px;box-shadow:none}
.btn-sm:active{transform:none}
.btn[disabled]{opacity:.6}
/* các bản -light của template */
.btn-primary-light{background:#e1eaf9;color:#0052cc;border-color:transparent}
.btn-primary-light:hover{background:var(--primary);color:#fff}
.btn-danger-light{background:#fff;color:var(--red);border-color:transparent}
.btn-danger-light:hover{background:#ffeae5;color:var(--red-d)}
.btn-warning-light{background:#fff2e2;color:#ff9920;border-color:transparent}
.btn-warning-light:hover{background:var(--amber);color:#fff}
.btn-success-light{background:#d1f5f0;color:#04a08b;border-color:transparent}
.btn-success-light:hover{background:var(--green);color:#fff}
.btn-info-light{background:#d1f3ff;color:#00baff;border-color:transparent}
.btn-info-light:hover{background:var(--info);color:#fff}

/* ---- Form ---- */
.input,.select,.textarea{border:1px solid #86a4c3;border-radius:5px;padding:8px 12px;font-weight:400;color:var(--text)}
.input:focus,.select:focus,.textarea:focus{border-color:var(--primary);box-shadow:none}
.form-row label{font-weight:500}

/* ---- Badge / pill / alert / progress ---- */
.badge{font-weight:300;border-radius:3px;border:0;line-height:1.3}
.badge-pill{border-radius:10rem;font-weight:600;padding:4px 11px}
.badge-dot{display:inline-block;width:8px;height:8px;padding:0;border-radius:100%}
.badge-dot.xl{width:11px;height:11px}
.bg-primary{background:var(--primary);color:#fff}.bg-danger{background:var(--red);color:#fff}
.bg-warning{background:var(--amber);color:#fff}.bg-success{background:var(--green);color:#fff}
.bg-info{background:var(--info);color:#fff}
.badge-primary{background:var(--primary);color:#fff}.badge-warning{background:var(--amber);color:#fff}
.badge-info{background:var(--info);color:#fff}.badge-danger{background:var(--red);color:#fff}
.badge-success{background:var(--green);color:#fff}
.pill{border:1px solid var(--line);background:#f3f6f9;font-weight:400;color:var(--muted2);border-radius:3px}
.alert{border:0;border-radius:5px;font-weight:500}
.alert-info{background:#e1eaf9;color:#0052cc}
.alert-success{background:#d1f5f0;color:#04a08b}
.alert-warn{background:#fff2e2;color:#ff9920}
.alert-error,.alert-danger{background:#ffeae5;color:#ff562f}
.badge-guest{background:var(--amber-l);color:#c2410c;border:0}
.badge-plan-free{background:var(--green-l);color:var(--green-d);border:0}
.badge-plan-pro{background:var(--primary-l);color:var(--primary);border:0}
.progress{height:10px;background:#ebedf3;border-radius:5px;overflow:hidden;box-shadow:none}
.progress.xs{height:7px}
.progress-bar{display:block;height:100%;border-radius:5px;background-size:1rem 1rem;background-image:linear-gradient(45deg,rgba(255,255,255,.15) 25%,transparent 25%,transparent 50%,rgba(255,255,255,.15) 50%,rgba(255,255,255,.15) 75%,transparent 75%,transparent);animation:gx-stripes 1s linear infinite}
@keyframes gx-stripes{from{background-position:1rem 0}to{background-position:0 0}}
.progress-bar-primary{background-color:var(--primary)}.progress-bar-warning{background-color:var(--amber)}
.progress-bar-info{background-color:var(--info)}.progress-bar-danger{background-color:var(--red)}
.progress-bar-success{background-color:var(--green)}

/* ---- Câu hỏi / đáp án / tabs / flashcard / modal ---- */
.q-card,.qb-item{border:0;border-radius:10px;box-shadow:var(--shadow)}
.q-num{background:var(--primary);border-radius:5px}
.opt{border:1px solid var(--line2);border-radius:5px;font-weight:400;box-shadow:none}
.opt:hover{background:var(--primary-l2);border-color:var(--primary-border);transform:none;box-shadow:none}
.opt:active{transform:none;box-shadow:none}
.opt.correct{background:var(--green-l);border-color:#9fd9d1;box-shadow:none}
.opt.wrong{background:var(--red-l);border-color:#ffc3b3;box-shadow:none}
.opt input{accent-color:var(--primary)}
.result-score .big{color:var(--primary)}
.qtbtn{border:1px solid var(--line2);border-radius:5px;font-weight:400;box-shadow:none}
.qtbtn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-l2)}
.qtbtn:active{transform:none;box-shadow:none}
.sec-title{color:var(--primary);border-bottom:1px solid var(--line);font-weight:500}
.tab{font-weight:500;color:#8d97ad}
.tab:hover{color:var(--primary)}
.tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.flash-face{border:0;border-radius:10px;box-shadow:var(--shadow-lg)}
.flash-back{background:var(--primary-l)}
.flash-face .big{font-weight:600;color:var(--text)}
.flash-face .fc-spk{background:var(--primary-l);box-shadow:none;color:var(--primary)}
.flash-face .fc-spk:hover{background:var(--primary)}
.flashcard:hover{transform:translateY(-4px)}
.ym{border:0;border-radius:10px;box-shadow:0 2px 3px rgba(0,0,0,.125)}
.ym-head{border-bottom:1px solid #f3f6f9}
.ym-foot{border-top:1px solid #f3f6f9}
.xopt-box{border:1px dashed var(--line2);border-radius:10px;background:#fafbfd}
.auth-wrap{background:linear-gradient(160deg,#fafbfd 0%,#e6effa 100%)}
.rt-tools{background:#f3f6f9;border:1px solid #86a4c3;border-bottom:0}
.rt-ed{border:1px solid #86a4c3;border-top:0}
.rt-ed:focus{border-color:var(--primary);box-shadow:none}
.rt-tools button{border:1px solid var(--line2);border-radius:5px}
.rt-tools button:hover{border-color:var(--primary);color:var(--primary)}
.btn:focus-visible,.tab:focus-visible,.nav-item:focus-visible,.input:focus-visible,.select:focus-visible,.textarea:focus-visible{outline:2px solid rgba(0,82,204,.4);outline-offset:2px}
.spin{border-color:rgba(0,82,204,.25);border-top-color:var(--primary)}

/* ===== Dashboard EduAdmin (home_gemtech.php) ===== */
.gx-wrap{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:24px;align-items:start}
@media(max-width:1100px){.gx-wrap{grid-template-columns:1fr}}
.gx-main{min-width:0;display:grid;gap:24px}
.gx-rail{display:grid;gap:24px}

/* welcome box: bg-primary-light + ảnh custom-1 phải-dưới */
.gx-hero{position:relative;border-radius:10px;padding:30px 300px 30px 30px;overflow:hidden;box-shadow:var(--shadow);min-height:180px;
  background-color:#d9e6f8;
  background-image:var(--gx-hero-img,none);
  background-position:right bottom;background-size:auto 100%;background-repeat:no-repeat}
.gx-hero h1{margin:0 0 4px;font-size:30px;font-weight:400;color:var(--text)}
.gx-hero h1 strong{font-weight:600}
.gx-hero .wave{height:28px;width:auto;vertical-align:-4px;margin-right:6px}
.gx-hero p{margin:10px 0;color:var(--text);font-size:16px;line-height:1.55;max-width:480px}
.gx-hero .hl{color:var(--amber);font-weight:600}
.gx-hero-tx{position:relative;z-index:1}
.gx-hero-btns{margin-top:14px;display:flex;gap:10px;flex-wrap:wrap}
@media(max-width:900px){.gx-hero{padding:24px;background-image:none}}

/* box EduAdmin */
.gx-box{background:#fff;border-radius:10px;box-shadow:var(--shadow);padding:0}
.gx-box-h{display:flex;align-items:center;gap:10px;padding:1.25rem 1.5rem;border-bottom:1px solid var(--line)}
.gx-box-h.nb{border-bottom:0;padding-bottom:.5rem}
.gx-box-h h3{margin:0;font-size:17px;font-weight:400;font-family:'Be Vietnam Pro',sans-serif}
.gx-box-h .lnk{margin-left:auto;font-size:13px;font-weight:500;background:var(--primary);color:#fff;border-radius:5px;padding:6px 12px}
.gx-box-h .lnk:hover{background:var(--primary-d);color:#fff}
.gx-box-h .lnk.lt{background:var(--amber-l);color:#cc7100}
.gx-box-h .lnk.lt:hover{background:var(--amber);color:#fff}
.gx-box-b{padding:1.5rem}

/* students progress: avatar 48 rounded10 nền -light, progress striped, badge-pill */
.gx-sp{display:flex;align-items:center;gap:14px;justify-content:space-between;margin-bottom:26px}
.gx-sp:last-child{margin-bottom:0}
.gx-sp .lf{display:flex;align-items:center;gap:14px;flex:1;min-width:0}
.gx-sp img.av{width:48px;height:48px;border-radius:10px;flex:none;object-fit:cover}
.gx-sp .in{flex:1;min-width:0}
.gx-sp .nm{display:block;color:var(--text);font-weight:500;font-size:15.5px;margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.gx-sp .nm:hover{color:var(--primary)}
.gx-sp .progress{max-width:200px;margin:0}
.gx-av0{background:var(--primary-l)}.gx-av1{background:var(--amber-l)}.gx-av2{background:var(--info-l)}.gx-av3{background:var(--red-l)}.gx-av4{background:var(--green-l)}

/* chart khu vực */
.gx-donut-wrap{min-height:300px}
.gx-legend{display:flex;justify-content:center;gap:28px;margin-top:6px;font-size:14px;color:var(--text);font-weight:500;padding-bottom:6px}
.gx-legend i{display:inline-block;width:11px;height:11px;border-radius:50%;margin-right:9px}

/* lịch tháng */
.gx-cal{width:100%;border-collapse:collapse;text-align:center;font-size:12.5px}
.gx-cal th{color:#8d97ad;font-weight:500;padding:6px 0;font-size:11.5px}
.gx-cal td{padding:3px 0}
.gx-cal .d{width:32px;height:32px;line-height:32px;border-radius:5px;display:inline-block;position:relative;font-weight:400;color:var(--muted2)}
.gx-cal .d.out{opacity:.32}
.gx-cal .d.today{background:var(--primary);color:#fff;font-weight:600}
.gx-cal .d.due::after{content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);width:5px;height:5px;border-radius:50%;background:var(--amber)}
.gx-cal .d.today.due::after{background:#fff}

/* lessons: ô vuông màu ĐẶC 50×50 icon trắng + arrow phải */
.gx-ls{display:flex;align-items:center;gap:15px;padding:12px 0}
.gx-ls+.gx-ls{border-top:1px solid var(--line)}
.gx-ls .ic{width:50px;height:50px;border-radius:5px;flex:none;display:grid;place-items:center;font-size:21px;color:#fff}
.gx-ls .tx{flex:1;min-width:0}
.gx-ls .tx b{display:block;font-size:15.5px;font-weight:500;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.gx-ls .tx span{font-size:13px;color:#8d97ad}
.gx-ls .go{flex:none;color:#8d97ad;font-size:22px;line-height:1}
.gx-ls:hover .go{color:var(--primary)}

/* media files: table no-border, ô màu 50×50 */
.gx-mf-t{width:100%;border-collapse:collapse}
.gx-mf-t td{padding:.8rem .6rem;vertical-align:middle;border:0}
.gx-mf-t .sq{width:50px;height:50px;border-radius:5px;display:grid;place-items:center;font-weight:600;color:#fff;font-size:17px}
.gx-mf-t .nm{font-weight:600;color:var(--text)}
.gx-mf-t .fade{color:#8d97ad;font-size:13px}
.gx-mf-t .st{font-weight:500;white-space:nowrap}
.gx-mf-t .st .badge-dot{margin-right:9px}

/* promo: cam = text + nút light; xanh = arrow list */
.gx-promo{position:relative;border-radius:10px;color:#fff;padding:30px 130px 30px 30px;overflow:hidden;min-height:170px;box-shadow:var(--shadow);
  background-position:calc(100% + .5rem) bottom,0 0;background-size:auto 100%,cover;background-repeat:no-repeat,no-repeat}
.gx-promo-or{background-image:var(--gx-promo-img,none),linear-gradient(45deg,#ff562f,#ff9920)}
.gx-promo-bl{background-image:var(--gx-promo-img,none),linear-gradient(45deg,#0052cc,#00baff)}
.gx-promo h3{margin:0 0 6px;color:#fff;font-size:18.5px;font-weight:400}
.gx-promo p{margin:10px 0 16px;font-size:15px;line-height:1.55;color:#fff}
.gx-promo .tx{position:relative;z-index:1}
.gx-pbtn{display:inline-block;background:#fff;border-radius:5px;padding:8px 16px;font-weight:500;font-size:14px;text-decoration:none;color:var(--red);transition:all .3s}
.gx-promo-bl .gx-pbtn{color:var(--primary)}
.gx-pbtn:hover{box-shadow:var(--shadow-lg);color:var(--red-d)}
.gx-arrow{display:flex;align-items:center;gap:10px;margin-bottom:10px;font-size:16px;color:#fff}
.gx-arrow:hover{color:#fff;transform:translateX(4px);transition:transform .15s}
.gx-promo a,.gx-promo a:hover,.gx-promo h3,.gx-promo p{color:#fff}
.gx-pbtn,.gx-promo-or .gx-pbtn{color:var(--red)}
.gx-promo-bl .gx-pbtn,.gx-promo-bl .gx-pbtn:hover{color:var(--primary)}
.gx-promo-or .gx-pbtn:hover{color:var(--red-d)}
.gx-arrow .ar{font-size:15px;opacity:.9}
@media(max-width:560px){.gx-promo{padding:22px;background-image:none,linear-gradient(0deg,#ff562f,#ff562f)}.gx-promo-bl{background-image:none,linear-gradient(0deg,#0052cc,#0052cc)}}

/* ---- Icon icomoon: kích thước/căn giữa từng vị trí ---- */
.nav-item .ico{display:inline-flex;align-items:center;justify-content:center}
.nav-item .ico i{font-size:19px;line-height:1}
.sidebar-foot .nav-item .ico i{font-size:18px}
.gx-chip i,.bell i,.hamb i{font-size:19px;line-height:1}
.stat .ico i{font-size:22px;line-height:1;color:var(--primary)}
.grid-4 .stat:nth-child(2) .ico i{color:var(--amber)}
.grid-4 .stat:nth-child(3) .ico i{color:var(--green)}
.grid-4 .stat:nth-child(4) .ico i{color:var(--info)}
.gx-ls .ic i{font-size:22px;line-height:1;color:#fff}
.gx-ud-menu i{font-size:15px;margin-right:9px;vertical-align:-2px;color:#8d97ad}
.gx-box-h h3 i{font-size:17px;vertical-align:-2px;margin-right:6px;color:var(--primary)}
.gx-arrow .ar i{font-size:15px;color:#fff}
.gx-cal+ .small{font-size:12px}

/* ---- Sparkline trong thẻ thống kê ---- */
.stat{display:block;position:relative;overflow:hidden}
.gx-spark{margin:10px -1.5rem -1.5rem;pointer-events:none}

/* ---- Sidebar thu gọn (chỉ desktop): html.sb-mini ----
   LƯU Ý: không dùng transition width/margin ở đây — bị kẹt (stuck ở giá trị đầu) trên trang này. */
.sidebar .brand img.brand-sm{display:none} /* phải thắng .brand img của app.css */
@media(min-width:861px){
  html.sb-mini .sidebar{width:74px!important}
  html.sb-mini .main{margin-left:74px!important}
  html.sb-mini .sidebar .brand{justify-content:center;padding:0}
  html.sb-mini .sidebar .brand img{display:none}
  html.sb-mini .sidebar .brand img.brand-sm{display:block;height:36px;width:36px;border-radius:9px;object-fit:cover}
  html.sb-mini .nav-group{display:none}
  html.sb-mini .sidebar .nav-item{justify-content:center;padding:12px 0;border-left-width:4px}
  html.sb-mini .sidebar .nav-item span:last-child{display:none}
  html.sb-mini .sidebar .nav-item .ico{margin:0}
  html.sb-mini .sidebar-foot{flex-wrap:wrap}
  html.sb-mini .sidebar-foot .nav-item{flex:1 0 50%;padding:10px 0}
}

/* ---- Thẻ stat có mini-donut bên phải (hàng hệ thống admin) ---- */
.gx-statchart{display:flex;align-items:center;gap:6px}
.gx-statchart .tx{flex:1;min-width:0}
.gx-statchart .tx .num{font-size:25px;font-weight:700;white-space:nowrap;line-height:1.1}
.gx-statchart .tx .lbl{font-size:12px;line-height:1.35;margin-top:2px}
.gx-statchart .ch{flex:none;width:76px;height:76px;margin:-6px -8px -6px 0}

/* ---- Bảng màu chính thức ui_color_utilities (light + gradient 45°) ---- */
.bg-primary-light{background-color:#e1eaf9!important;color:#0052cc}
.bg-info-light{background-color:#d1f3ff!important;color:#00baff}
.bg-success-light{background-color:#d1f5f0!important;color:#04a08b}
.bg-danger-light{background-color:#ffeae5!important;color:#ff562f}
.bg-warning-light{background-color:#fff2e2!important;color:#ff9920}
.bg-gradient-primary{background:linear-gradient(45deg,#0052cc,#00baff)!important;color:#fff}
.bg-gradient-secondary{background:linear-gradient(45deg,#b7c1d1,#00baff)!important;color:#fff}
.bg-gradient-info{background:linear-gradient(45deg,#00baff,#0052cc)!important;color:#fff}
.bg-gradient-success{background:linear-gradient(45deg,#04a08b,#00baff)!important;color:#fff}
.bg-gradient-danger{background:linear-gradient(45deg,#ff562f,#00baff)!important;color:#fff}
.bg-gradient-warning{background:linear-gradient(45deg,#ff9920,#00baff)!important;color:#fff}
.text-primary{color:#0052cc!important}.text-info{color:#00baff!important}
.text-success{color:#04a08b!important}.text-danger{color:#ff562f!important}
.text-warning{color:#ff9920!important}.text-dark{color:#172b4c!important}
/* trang trí khối dùng palette: ô icon lessons & avatar & sq dùng gradient 45° */
.gx-ls .ic.bg-warning{background:linear-gradient(45deg,#ff9920,#ffc36d)}
.gx-ls .ic.bg-primary{background:linear-gradient(45deg,#0052cc,#00baff)}
.gx-ls .ic.bg-danger{background:linear-gradient(45deg,#ff562f,#ff9920)}
.gx-ls .ic.bg-success{background:linear-gradient(45deg,#04a08b,#00baff)}
.gx-ls .ic.bg-info{background:linear-gradient(45deg,#00baff,#0052cc)}
.gx-mf-t .sq.bg-primary{background:linear-gradient(45deg,#0052cc,#00baff)}
.gx-mf-t .sq.bg-danger{background:linear-gradient(45deg,#ff562f,#ff9920)}
.gx-mf-t .sq.bg-success{background:linear-gradient(45deg,#04a08b,#00baff)}
.gx-mf-t .sq.bg-info{background:linear-gradient(45deg,#00baff,#0052cc)}
.gx-mf-t .sq.bg-warning{background:linear-gradient(45deg,#ff9920,#ffc36d)}
.avatar{background:linear-gradient(45deg,#172b4c,#3b6dc1)}
.gx-box-h .lnk{background:linear-gradient(45deg,#0052cc,#00baff)}
.gx-box-h .lnk:hover{background:linear-gradient(45deg,#003e99,#0095cc);color:#fff}
.gx-box-h .lnk.lt{background:#fff2e2;color:#ff9920}
.gx-box-h .lnk.lt:hover{background:linear-gradient(45deg,#ff9920,#ffc36d);color:#fff}

/* ===== Lively — chuyển động hiện đại (tôn trọng reduced-motion; KHÔNG transition width — bị kẹt) ===== */
@media (prefers-reduced-motion: no-preference){
  /* các khối xuất hiện so le */
  .gx-main>*,.gx-rail>*{animation:gxIn .55s cubic-bezier(.2,.7,.3,1) both}
  .gx-main>*:nth-child(1){animation-delay:.03s}.gx-main>*:nth-child(2){animation-delay:.1s}
  .gx-main>*:nth-child(3){animation-delay:.17s}.gx-main>*:nth-child(4){animation-delay:.24s}
  .gx-main>*:nth-child(5){animation-delay:.31s}.gx-main>*:nth-child(6){animation-delay:.38s}
  .gx-rail>*:nth-child(1){animation-delay:.12s}.gx-rail>*:nth-child(2){animation-delay:.22s}
  .gx-rail>*:nth-child(3){animation-delay:.32s}.gx-rail>*:nth-child(4){animation-delay:.42s}
  @keyframes gxIn{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
  /* bàn tay vẫy */
  .gx-hero .wave{animation:gxWave 2.4s ease-in-out infinite;transform-origin:72% 82%;display:inline-block}
  @keyframes gxWave{0%,55%,100%{transform:rotate(0)}8%{transform:rotate(18deg)}16%{transform:rotate(-8deg)}24%{transform:rotate(14deg)}32%{transform:rotate(-4deg)}40%{transform:rotate(8deg)}}
  /* blob trang trí trôi nhẹ trong hero */
  .gx-hero::before,.gx-hero::after{content:"";position:absolute;border-radius:50%;pointer-events:none;z-index:0}
  .gx-hero::before{width:160px;height:160px;left:-50px;bottom:-70px;background:radial-gradient(circle,rgba(0,82,204,.12),transparent 70%);animation:gxFloat 7s ease-in-out infinite}
  .gx-hero::after{width:110px;height:110px;right:36%;top:-46px;background:radial-gradient(circle,rgba(0,186,255,.16),transparent 70%);animation:gxFloat 9s ease-in-out -3s infinite}
  @keyframes gxFloat{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(14px) scale(1.08)}}
  /* hover nâng box + icon nhún */
  .gx-box{transition:transform .2s ease,box-shadow .2s ease}
  .gx-box:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
  .stat .ico{transition:transform .2s ease}
  .stat:hover .ico{transform:scale(1.14) rotate(-7deg)}
  .gx-sp img.av{transition:transform .2s ease}
  .gx-sp:hover img.av{transform:scale(1.1) rotate(-4deg)}
  /* progress bar "mọc" bằng transform (an toàn) + giữ sọc chạy */
  .progress-bar{transform-origin:left;animation:gx-stripes 1s linear infinite,gxGrow 1.1s .25s cubic-bezier(.2,.7,.3,1) backwards}
  @keyframes gxGrow{from{transform:scaleX(0)}to{transform:scaleX(1)}}
  /* hôm nay trên lịch pulse */
  .gx-cal .d.today{animation:gxPulse 2.6s ease-out infinite}
  @keyframes gxPulse{0%{box-shadow:0 0 0 0 rgba(0,82,204,.45)}70%{box-shadow:0 0 0 9px rgba(0,82,204,0)}100%{box-shadow:0 0 0 0 rgba(0,82,204,0)}}
  /* chuông rung khi có thông báo */
  .bell{position:relative}
  .bell:has(.bell-n) i{animation:gxRing 3s ease infinite;display:inline-block;transform-origin:top center}
  @keyframes gxRing{0%,86%,100%{transform:rotate(0)}88%{transform:rotate(12deg)}91%{transform:rotate(-10deg)}94%{transform:rotate(6deg)}97%{transform:rotate(-3deg)}}
  /* nav & list trượt nhẹ */
  .sidebar .nav-item{transition:background .15s,color .15s,padding-left .18s}
  .sidebar .nav-item:hover{padding-left:26px}
  .gx-ls{transition:transform .15s ease}
  .gx-ls:hover{transform:translateX(5px)}
  .gx-mf-t tr{transition:background .15s}
  .gx-mf-t tr:hover td{background:#f6f9fe}
  /* nút: vệt sáng quét qua khi hover */
  .btn{position:relative;overflow:hidden}
  .btn::after{content:"";position:absolute;top:0;left:-80%;width:50%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.35),transparent);transform:skewX(-20deg)}
  .btn:hover::after{animation:gxShine .65s ease}
  @keyframes gxShine{to{left:135%}}
  .gx-pbtn{transition:transform .15s,box-shadow .15s}
  .gx-pbtn:hover{transform:translateY(-2px)}
  .gx-box-h .lnk{transition:transform .15s,box-shadow .15s}
  .gx-box-h .lnk:hover{transform:translateY(-1px);box-shadow:0 5px 12px rgba(0,82,204,.3)}
}

/* ===== Mobile app: bớt thông tin thừa ===== */
@media(max-width:860px){
  .gx-chip{display:none}                 /* nút toàn màn hình — vô dụng trên điện thoại */
  .gx-bc{display:none}                   /* breadcrumb — trùng tiêu đề trang + đã có bottom bar */
  .gx-footer .ft-x{display:none}         /* footer chỉ để THƯƠNG HIỆU, bỏ mô tả + link */
  .gx-footer{justify-content:center;text-align:center;font-size:11.5px;opacity:.6;padding:16px 0 6px;border-top:0}
  .topbar .badge{display:none}           /* badge FREE/role */
  .topbar-right .uname{display:none}     /* tên dài -> chỉ còn avatar */
  /* ===== App bar phẳng kiểu Material (Android) ===== */
  .topbar{height:56px;gap:4px;padding:0 6px 0 2px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 1px 4px rgba(20,30,60,.07);justify-content:space-between}
  .hamb,.bell,.user-chip{background:transparent!important;box-shadow:none!important}
  .hamb,.bell{width:44px;height:44px;border-radius:50%;display:grid;place-items:center}
  .hamb:active,.bell:active{background:rgba(0,0,0,.06)!important}
  .user-chip{padding:4px;height:44px}
  .user-chip .avatar{width:34px;height:34px}
  .gx-ud-menu{right:6px}
  /* ===== Tiêu đề trang kiểu Material: phẳng, bỏ thẻ + viền màu trái ===== */
  .page-head{background:transparent;box-shadow:none;border-radius:0;padding:0;margin:2px 0 16px;overflow:visible}
  .page-head::before{display:none}
  .page-head h1{font-size:22px;font-weight:700;letter-spacing:-.2px}
  /* thẻ nội dung bo góc mềm kiểu Material */
  .card,.stat,.gx-card{border-radius:14px}
}

/* ===================== CHẾ ĐỘ TỐI (Dark mode) — giao diện in-app ===================== */
html.theme-dark{
  --bg:#0f1724; --card:#1a2536; --cream:#1a2536;
  --text:#dfe5ef; --muted:#7e8ca3; --muted2:#a9b4c7;
  --line:rgba(255,255,255,.085); --line2:#33415a;
  --primary-l:#16263e; --primary-l2:#121d30;
  --green-l:#10241f; --red-l:#2a1714; --amber-l:#2a2110; --info-l:#0e2733;
  --shadow:0 1px 3px rgba(0,0,0,.45); --shadow-lg:0 14px 26px -12px rgba(0,0,0,.6);
}
html.theme-dark body{background:var(--bg);color:var(--text)}
html.theme-dark .main{background:var(--bg)}
html.theme-dark .card,html.theme-dark .stat,html.theme-dark .gx-box,html.theme-dark .gx-card,
html.theme-dark .page-head,html.theme-dark .table,html.theme-dark .q-card,html.theme-dark .qnav,
html.theme-dark .gx-ud-menu,html.theme-dark .empty,html.theme-dark .auth-card{background:var(--card);color:var(--text)}
html.theme-dark h1,html.theme-dark h2,html.theme-dark h3,html.theme-dark h4,html.theme-dark .page-head h1{color:var(--text)}
html.theme-dark .table th{background:var(--card);color:var(--muted2)}
html.theme-dark .table tbody tr:nth-child(even) td{background:var(--card)}
html.theme-dark .table tbody tr:hover td{background:#212d42}
html.theme-dark .table td,html.theme-dark .table th{border-color:var(--line)}
html.theme-dark .topbar{background:#131c2b;border-bottom:1px solid var(--line)}
html.theme-dark .hamb,html.theme-dark .bell,html.theme-dark .gx-chip,html.theme-dark .user-chip,
html.theme-dark .topsearch input{background:#222d40;color:var(--text)}
html.theme-dark .topsearch input::placeholder{color:var(--muted)}
html.theme-dark .gx-ud-menu{border-color:var(--line2)}
html.theme-dark .gx-ud-menu a{color:var(--text)}
html.theme-dark .gx-ud-menu a:hover{background:#222d40}
html.theme-dark .input,html.theme-dark .select,html.theme-dark .textarea{background:#131c2b;color:var(--text);border-color:var(--line2)}
html.theme-dark .input::placeholder,html.theme-dark .textarea::placeholder{color:var(--muted)}
html.theme-dark select option{background:#131c2b;color:var(--text)}
html.theme-dark .pill{background:#222d40;color:var(--muted2);border-color:var(--line)}
html.theme-dark .btn-ghost{background:var(--card);color:var(--muted2);border-color:var(--line2)}
html.theme-dark .btn-ghost:hover{background:#222d40;color:#4ea0ff;border-color:var(--primary)}
html.theme-dark .gx-box-h{border-bottom-color:var(--line)}
html.theme-dark a{color:#5aa2ff}
html.theme-dark .muted,html.theme-dark .muted2{color:var(--muted)}
html.theme-dark .xopt-box,html.theme-dark .rt-tools,html.theme-dark .rt-left{background:#131c2b}
html.theme-dark .ym-body,html.theme-dark .ym-card,html.theme-dark .modal,html.theme-dark .modal-content{background:var(--card);color:var(--text)}
html.theme-dark .mbar{background:#131c2b;border-top-color:var(--line)}
html.theme-dark .gx-bc{color:var(--muted)}
/* Banner chào mừng + các nền sáng còn lại */
html.theme-dark .gx-hero{background-color:#16243c}
html.theme-dark .gx-hero h1,html.theme-dark .gx-hero h2,html.theme-dark .gx-hero h3,html.theme-dark .gx-hero p,html.theme-dark .gx-hero span,html.theme-dark .gx-hero .gx-hero-tx{color:#e8edf5}
html.theme-dark .gx-sp .nm,html.theme-dark .gx-ls .tx b,html.theme-dark .gx-cal .d{color:var(--text)}
html.theme-dark .gx-cal .dow{color:var(--muted)}
html.theme-dark .progress{background:#222d40}
html.theme-dark .badge-guest{background:#3a2e12;color:#f0c674;border-color:#5a4a1e}
html.theme-dark .alert-info,html.theme-dark .alert-success,html.theme-dark .alert-warn,html.theme-dark .alert-error{filter:brightness(.85)}
/* Nút chuyển Sáng/Tối */
.theme-toggle{width:45px;height:45px;border-radius:50%;border:0;background:transparent;cursor:pointer;color:var(--text);font-size:19px;line-height:1;display:grid;place-items:center;padding:0;-webkit-tap-highlight-color:transparent;font-family:inherit}
.theme-toggle:hover{background:rgba(125,140,170,.15)}
.theme-toggle .ic-dark{display:none}
html.theme-dark .theme-toggle .ic-dark{display:block}
html.theme-dark .theme-toggle .ic-light{display:none}