/* ============================================================
   Khóa Học Solo LMS - design system
   Layout theo mau AgentBoss, doi navy -> tim dam.
   Doi mau thuong hieu: sua duy nhat khoi :root ben duoi.
   ============================================================ */
:root{
  --purple-900:#2a1259;
  --purple-800:#371a70;
  --purple-700:#4c2494;
  --purple-600:#6d28d9;
  --purple-100:#ede4ff;

  --accent:#f97316;
  --accent-dark:#ea580c;
  --accent-soft:#fbc39a;
  --accent-tint:#fff1e6;

  --cream:#faf6f0;
  --card:#ffffff;
  --line:#e9e2d8;
  --line-soft:#f1ebe2;

  --ink:#161020;
  --ink-2:#3f3550;
  --muted:#8b8296;

  --ok:#15803d;
  --ok-bg:#eafaf0;
  --warn:#b45309;
  --danger:#b91c1c;

  --radius:14px;
  --radius-lg:20px;
  --shadow:0 1px 2px rgba(22,16,32,.04), 0 8px 24px rgba(22,16,32,.05);
  --wrap:1180px;
  --font:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--cream);color:var(--ink);
  font-family:var(--font);font-size:11.2px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
button{font-family:inherit}
[hidden]{display:none!important}

/* ---------- Topbar ---------- */
.topbar{background:var(--purple-900);color:#fff;position:sticky;top:0;z-index:50}
.topbar-in{max-width:var(--wrap);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:800;letter-spacing:-.02em;font-size:13.3px}
.brand-mark{
  min-width:44px;height:36px;padding:0 9px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,#fcc419,#f59f00);color:#3b1e6e;font-weight:900;font-size:11.9px;
  letter-spacing:.02em;
}
.plan-chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:8px;letter-spacing:.13em;font-weight:800;text-transform:uppercase;
  padding:5px 11px;border-radius:9px;color:#fff;line-height:1.2;white-space:nowrap;
}
.plan-chip i{font-style:normal;font-weight:700;font-size:7.4px;letter-spacing:.1em;
  padding:2px 6px;border-radius:6px;background:rgba(255,255,255,.22)}

/* Mau nen theo bac hoc */
.chip-basic{background:linear-gradient(135deg,#4c3a8c,#3b2d73);color:#dcd2f7}   /* xanh tim cu */
.chip-pro  {background:linear-gradient(135deg,#15803d,#14532d)}                  /* xanh la dam */
.chip-vip  {background:linear-gradient(135deg,#f59e0b,#b91c1c)}                  /* vang do dam */
.chip-svip {background:linear-gradient(135deg,#ea580c,#7f1d1d)}                  /* do dam hon */
.chip-tn   {background:linear-gradient(135deg,#7c3aed,#4c1d95)}                  /* tim hoi dam */
.topbar-nav{margin-left:auto;display:flex;align-items:center;gap:22px;font-size:9.8px}
.topbar-nav a{color:#e6dcff;text-decoration:none;display:flex;align-items:center;gap:7px;padding:6px 2px;border-radius:8px}
.topbar-nav a:hover{color:#fff}
.topbar-nav a.on{color:#fff;box-shadow:inset 0 -2px 0 var(--accent)}

/* ---------- Page ---------- */
.page{max-width:var(--wrap);margin:0 auto;padding:34px 24px 90px}
.page-narrow{max-width:860px}
.crumb{font-size:9.8px;color:var(--muted);margin-bottom:18px}
.crumb a{color:var(--accent-dark);text-decoration:underline;text-underline-offset:3px}
.eyebrow{color:var(--muted);font-size:10.5px;margin:0 0 6px}
h1{font-size:clamp(18px,1.9vw,24px);line-height:1.16;letter-spacing:-.02em;margin:0 0 18px;font-weight:800;text-wrap:balance}
h2{font-size:18.2px;letter-spacing:-.02em;margin:0 0 16px;font-weight:800}
h3{font-size:12.6px;margin:0 0 10px;font-weight:700}
.section-head{display:flex;align-items:baseline;gap:14px;margin:38px 0 16px;flex-wrap:wrap}
.section-head h2{color:var(--accent);margin:0;font-size:21px}
.section-head .range{color:var(--muted);font-size:10.5px}
.muted{color:var(--muted)}
.small{font-size:9.1px}

/* ---------- Progress ---------- */
.progress-row{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:6px}
.bar{height:9px;border-radius:999px;background:#e6ded3;overflow:hidden;margin-bottom:10px}
.bar > i{display:block;height:100%;background:var(--accent);border-radius:999px;transition:width .5s ease}
.done-flag{color:var(--accent-dark);font-weight:700;font-size:9.8px}

/* ---------- Card ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow)}
.card + .card{margin-top:20px}
.card-tight{padding:22px}

/* ---------- Badges ---------- */
.badge-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:18px;margin-top:18px}
.badge-item{border:1px solid var(--line);border-radius:var(--radius);padding:22px 14px;text-align:center;background:#fff}
.badge-item.locked{opacity:.62}
.badge-face{
  width:96px;height:96px;margin:0 auto 14px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(160deg,var(--purple-700),var(--purple-900));color:#fff;
  font-weight:900;font-size:9.1px;text-align:center;padding:8px;line-height:1.25;
  box-shadow:inset 0 0 0 3px rgba(255,255,255,.22);
}
.badge-item.locked .badge-face{background:#c9c2bb;color:#f4f1ec;filter:grayscale(1)}
.badge-name{font-weight:700;font-size:10.5px;margin-bottom:3px}
.badge-cond{font-size:9.1px;color:var(--muted)}

/* ---------- Huy hieu cap do (anh that) ---------- */
.lvl-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:20px;margin-top:18px}
.lvl-item{
  border:1px solid var(--line);border-radius:var(--radius);padding:18px 14px 16px;
  text-align:center;background:#fff;transition:border-color .2s,transform .2s;
}
.lvl-item.dat{border-color:var(--accent);box-shadow:var(--shadow)}
.lvl-item .lvl-img{
  width:100%;max-width:150px;aspect-ratio:1;object-fit:contain;margin:0 auto 12px;
  filter:grayscale(1);opacity:.38;transition:filter .3s,opacity .3s,transform .3s;
}
.lvl-item.dat .lvl-img{filter:none;opacity:1}
.lvl-item.dat:hover .lvl-img{transform:scale(1.04)}
.lvl-cap{
  font-size:9.8px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);font-weight:800;margin-bottom:4px;
}
.lvl-item.dat .lvl-cap{color:var(--accent-dark)}
.lvl-dat{color:var(--ok);font-weight:700}
.lvl-bar{height:5px;margin:10px 0 0}

/* ---------- Lesson grid ---------- */
/* 5 bai mot hang tren man hinh rong, tu thu lai khi man hinh hep */
.lesson-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:11px}
@media (max-width:1100px){.lesson-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media (max-width:900px){.lesson-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:680px){.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}}
@media (max-width:460px){.lesson-grid{grid-template-columns:1fr}}
.lesson-card{
  background:#fff;border:1px solid var(--line);border-radius:13px;padding:13px 13px 12px;
  display:flex;flex-direction:column;min-height:124px;text-decoration:none;color:inherit;
  transition:border-color .15s, transform .15s, box-shadow .15s;
}
.lesson-card:hover{border-color:var(--accent-soft);transform:translateY(-2px);box-shadow:var(--shadow)}
.lesson-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:7px;gap:6px}
.lesson-no{font-size:8.4px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);font-weight:700}
.lesson-mark{font-size:10.5px;color:var(--accent)}
.lesson-title{font-weight:700;font-size:10.5px;line-height:1.38;margin-bottom:auto;
  overflow-wrap:anywhere}
.lesson-state{font-size:7.7px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700;margin-top:10px;
  display:flex;align-items:center;gap:6px}
.st-ico{font-size:11px;letter-spacing:0;line-height:1}
.st-xong{color:var(--accent);font-weight:900}
.lesson-card.ready{border-color:var(--accent);border-width:2px;padding:12px 12px 11px}
.lesson-card.ready .lesson-state{color:var(--accent-dark)}
.lesson-card.locked{background:#f5f1ea;color:#9a9187}
.lesson-card.locked:hover{transform:none;border-color:var(--line);box-shadow:none}
.plan-tag{
  font-size:8px;font-weight:800;letter-spacing:.1em;padding:3px 7px;border-radius:6px;
  background:var(--purple-100);color:var(--purple-700);text-transform:uppercase;
}
.plan-tag.vip{background:#fef3c7;color:#92400e}
.plan-tag.svip{background:#fce7f3;color:#9d174d}
.plan-tag.tn{background:#dcfce7;color:#166534}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:15px 30px;border-radius:12px;border:1px solid transparent;
  font-weight:700;font-size:11.2px;cursor:pointer;text-decoration:none;
  transition:background .15s,border-color .15s,opacity .15s;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark)}
.btn-primary[disabled],.btn-primary.is-done{background:var(--accent-soft);cursor:default}
.btn[disabled]{opacity:.4;cursor:not-allowed;pointer-events:none}
.btn-primary.is-done{opacity:1;pointer-events:none}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--accent-soft)}
.btn-purple{background:var(--purple-700);color:#fff}
.btn-purple:hover{background:var(--purple-800)}
.btn-sm{padding:9px 16px;font-size:9.8px;border-radius:10px}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:16px}

/* ---------- Lesson player ---------- */
.lesson-body{font-size:13.3px;line-height:1.72;color:var(--ink-2)}

/* Bang do admin dan vao noi dung bai - thuong rat rong, phai cuon ngang
   trong khung chu khong duoc day trang tran ra ngoai man hinh. */
.bang-cuon{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 0 22px;
  border:1px solid var(--line);border-radius:12px;background:#fff}
.lesson-body table{border-collapse:collapse;width:100%;min-width:520px;font-size:11.2px;margin:0}
.lesson-body th,.lesson-body td{border-bottom:1px solid var(--line);padding:10px 13px;
  text-align:left;vertical-align:top;line-height:1.55}
.lesson-body thead th{background:#faf7f2;font-weight:800;color:var(--ink);white-space:nowrap;
  position:sticky;top:0}
.lesson-body tbody tr:last-child td{border-bottom:0}
.lesson-body table p{margin:0}
/* Bang nam trong khung cuon roi thi bo vien lap */
.bang-cuon > table{border:0;border-radius:0}
.lesson-body img{max-width:100%;height:auto}
.lesson-body p{margin:0 0 22px}
.lesson-body strong{color:var(--ink)}
.lesson-body ul,.lesson-body ol{margin:0 0 22px;padding-left:24px}
.lesson-body li{margin-bottom:9px}
.audio-wrap{background:var(--purple-900);border-radius:var(--radius);padding:18px 20px;margin-bottom:26px;color:#fff}
.audio-wrap .audio-label{font-size:9.1px;letter-spacing:.12em;text-transform:uppercase;color:#c3b1ec;font-weight:700;margin-bottom:10px}
.audio-wrap audio{width:100%}
.slides{margin-bottom:26px}
.slide-stage{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#f7f3ed}
.slide-stage img{width:100%;object-fit:contain;max-height:520px;margin:0 auto}
.slide-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px}
.slide-caption{font-size:9.8px;color:var(--muted)}
/* ---------- Dieu kien hoan thanh bai (thoi gian hoc + nghe audio) ---------- */
.dk-box{margin:0 0 18px}
.dk-row{display:grid;grid-template-columns:auto auto 1fr;align-items:center;gap:12px;margin-bottom:9px}
.dk-nhan{font-size:9.8px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700;white-space:nowrap}
.dk-so{font-size:11.2px;font-weight:700;color:var(--ink-2);font-variant-numeric:tabular-nums;white-space:nowrap}
.dk-so.xong{color:var(--ok)}
.dk-bar{height:6px;margin:0;flex:1}

.pdf-wrap{margin-bottom:26px}
.pdf-frame{width:100%;height:min(78vh,720px);border:1px solid var(--line);border-radius:var(--radius);background:#f7f3ed}
.pdf-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:10px;flex-wrap:wrap}
.accordion{border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;margin:26px 0}
.accordion summary{cursor:pointer;font-weight:700;font-size:11.9px;list-style:none;display:flex;justify-content:space-between;gap:12px}
.accordion summary::-webkit-details-marker{display:none}
.accordion summary::after{content:"\25be";color:var(--muted)}
.accordion[open] summary::after{content:"\25b4"}
.accordion .acc-body{padding-top:14px;font-size:11.2px;color:var(--ink-2)}
.divider{height:1px;background:var(--line);margin:26px 0}

/* ---------- Quiz ---------- */
.quiz-q{margin-bottom:28px}
.quiz-q h3{font-size:13.3px;line-height:1.45;margin-bottom:14px}
.opt{
  display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;
  border:1px solid var(--line);background:#fff;border-radius:12px;padding:14px 16px;
  margin-bottom:10px;cursor:pointer;font-size:11.2px;transition:border-color .12s,background .12s;
  color:var(--ink);
}
.opt:hover{border-color:var(--accent-soft)}
.opt .key{
  flex:0 0 26px;height:26px;border-radius:7px;background:var(--purple-100);color:var(--purple-700);
  display:grid;place-items:center;font-weight:800;font-size:9.1px;
}
.opt.sel{border-color:var(--accent);background:var(--accent-tint)}
.opt.correct{border-color:var(--ok);background:var(--ok-bg)}
.opt.wrong{border-color:var(--danger);background:#fef2f2}
.opt[disabled]{cursor:default}
.opt[disabled]:not(.correct):not(.wrong){opacity:.55}
.explain{font-size:10.5px;color:var(--ink-2);background:#f7f4ef;border-left:3px solid var(--accent);padding:12px 16px;border-radius:0 10px 10px 0;margin-top:6px}
.score-box{text-align:center;padding:14px 0 4px}
.score-num{font-size:36.4px;font-weight:900;letter-spacing:-.03em;line-height:1}
.score-num.pass{color:var(--ok)}
.score-num.fail{color:var(--danger)}

/* ---------- Forms ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-size:9.8px;font-weight:700;margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:11px;
  font-size:11.2px;font-family:inherit;background:#fff;color:var(--ink);
}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--purple-600);outline-offset:1px;border-color:transparent}
.msg{padding:12px 16px;border-radius:11px;font-size:10.5px;margin-bottom:16px}
.msg.err{background:#fef2f2;color:var(--danger)}
.msg.ok{background:var(--ok-bg);color:var(--ok)}
.msg.nhac{background:#fff8ec;color:#8a5a00}

/* ---------- Vach ngan "hoac" ---------- */
.ngan-cach{display:flex;align-items:center;gap:12px;margin:16px 0;color:var(--muted);font-size:9.8px;
  text-transform:uppercase;letter-spacing:.12em;font-weight:700}
.ngan-cach::before,.ngan-cach::after{content:"";flex:1;height:1px;background:var(--line)}

.lvl-nut{margin-top:9px}

/* ---------- The PDF tren dien thoai (khong nhung duoc) ---------- */
.pdf-mobile{background:#f7f4ef;border:1px solid var(--line);border-radius:14px;
  padding:26px 20px;text-align:center;margin:18px 0}
.pdf-mobile-icon{font-size:34px;line-height:1;margin-bottom:10px}
.pdf-mobile-ten{margin:0 0 5px;font-weight:800;font-size:12.6px}
.pdf-mobile-mo{margin:0 0 15px;font-size:10.5px;color:var(--muted)}

/* Nhay sang khung dang ky khi bam "Bat dau hoc" */
@keyframes nhaySang{0%{box-shadow:0 0 0 0 rgba(240,120,30,.55)}100%{box-shadow:0 0 0 18px rgba(240,120,30,0)}}
.nhay-sang{animation:nhaySang 1.1s ease-out 2}

/* ---------- Khoi Level trong moi khoa hoc ---------- */
.khoi{border-radius:15px;padding:13px 13px 13px;margin:0 0 13px}
.khoi-free{background:#eefaf1}            /* hoc mien phi */
.khoi-xam {background:#f2f2f4}            /* mo voi goi Pro */
.khoi-hong{background:#fdeef3}            /* mo voi goi VIP / SVIP */
.khoi-tim {background:#f2edfb}            /* mo voi goi Truyen nghe */
.khoi-mo{opacity:.78}
.khoi-dau{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:0 2px 11px}
.khoi-ten{font-size:9.8px;font-weight:800;text-transform:uppercase;letter-spacing:.11em;color:#5b5468}
.khoi-ghichu{text-transform:none;letter-spacing:0;font-weight:600;font-size:11px;color:#7a7385;margin-left:4px}
.khoi-dem{font-size:9.8px;font-weight:700;color:var(--muted)}
.lesson-card.sap-ra-mat{background:repeating-linear-gradient(135deg,#fff 0 10px,#faf8f4 10px 20px);border-style:dashed;cursor:default}
.lesson-card.sap-ra-mat .lesson-title{color:var(--muted)}
.lesson-card.sap-ra-mat .lesson-state{color:#b08a2e}
.nhan-cho{display:inline-block;margin-left:6px;padding:1px 8px;border-radius:99px;background:#fdf3dc;color:#9a6b00;font-size:10px;font-weight:800;vertical-align:middle}
tr.dong-cho td{color:var(--muted)}
.khoi .lesson-grid{margin:0}

/* ---------- Box thi tot nghiep ---------- */
.tn-hop{margin-top:26px}
.tn-tieude-phu{font-size:12.6px;font-weight:700;color:var(--accent-dark)}
.tn-luoi{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin-top:14px}
.tn-the{display:flex;flex-direction:column;gap:4px;padding:15px 16px;border-radius:14px;
  border:1px solid var(--line);text-decoration:none;background:#fff}
.tn-nhan{font-weight:800;font-size:12.6px;color:var(--ink)}
.tn-dem{font-size:10.5px;color:var(--muted)}
.tn-trangthai{font-size:10.5px;font-weight:700;color:var(--muted);margin-top:3px}
.tn-hb{font-size:9.8px;color:#8a5a00;background:#fff8ec;border-radius:7px;padding:4px 7px;margin-top:6px}
.tn-mo{border-color:var(--accent);box-shadow:0 4px 14px rgba(240,120,30,.14)}
.tn-mo .tn-trangthai{color:var(--accent-dark)}
.tn-mo:hover{transform:translateY(-1px)}
.tn-xong{border-color:var(--ok);background:var(--ok-bg)}
.tn-xong .tn-trangthai{color:var(--ok)}
.tn-khoa{opacity:.6}

/* ---------- Phan thuong / hoc bong ---------- */
.pt-the{display:flex;gap:18px;align-items:center;padding:16px 0;border-top:1px solid var(--line)}
.pt-the:first-of-type{border-top:0;padding-top:6px}
.pt-xong{opacity:.6}
.pt-phan{flex:0 0 auto;width:74px;height:74px;border-radius:16px;display:grid;place-items:center;
  background:linear-gradient(135deg,#fcc419,#f59f00);color:#3b1e6e;font-weight:900;font-size:25px;line-height:1}
.pt-phan span{font-size:13px}
.pt-chu{flex:1;min-width:0}
.pt-ten{margin:0 0 3px;font-weight:800;font-size:13.3px}
.pt-mo{margin:0 0 5px;font-size:10.5px;color:var(--muted)}
.pt-tien{margin:0 0 10px;font-size:12.6px}
.pt-gach{text-decoration:line-through;color:var(--muted)}
.pt-nut{margin-top:2px}
.pt-ql{background:#f6f2fd;border-radius:11px;padding:11px 14px 5px;margin:4px 0 12px}
.pt-ql-tieude{margin:0 0 7px;font-size:10.5px;font-weight:800;color:var(--purple-700)}
.pt-ql ul{list-style:none;margin:0;padding:0;font-size:10.5px;line-height:1.5;color:var(--ink-2)}
.pt-ql li{position:relative;padding-left:18px;margin-bottom:6px}
.pt-ql li::before{content:"\2713";position:absolute;left:0;color:var(--accent);font-weight:800}

.hb-box{display:flex;gap:16px;align-items:center;padding:6px 0}
.hb-phan{flex:0 0 auto;width:66px;height:66px;border-radius:15px;display:grid;place-items:center;
  background:linear-gradient(135deg,#fcc419,#f59f00);color:#3b1e6e;font-weight:900;font-size:22px;line-height:1}
.hb-phan span{font-size:12px}
.hb-ten{margin:0 0 3px;font-weight:800;font-size:13.3px}
.hb-mo{margin:0 0 3px;font-size:11.2px}

/* ---------- Cot review + khung noi khi re chuot ---------- */
.rv-o{max-width:230px;min-width:150px;cursor:help}
.rv-chu{font-style:italic;color:var(--ink)}
.rv-trong{color:var(--muted)}
.rv-co-them .rv-chu{border-bottom:1px dotted var(--line)}
.rv-o:hover .rv-chu,.rv-o:focus .rv-chu{color:var(--accent-dark)}
.rv-o:focus{outline:2px solid var(--accent);outline-offset:-2px;border-radius:6px}

.rv-tip{position:fixed;z-index:300;max-width:380px;background:#fff;
  border:1px solid var(--line);border-radius:13px;padding:14px 16px;
  box-shadow:0 16px 40px rgba(22,16,32,.2);pointer-events:none}
.rv-tip-ten{margin:0 0 8px;font-size:11.9px;font-weight:800}
.rv-tip-phu{font-weight:400;color:var(--muted)}
.rv-tip-chu{margin:0;font-size:12.6px;line-height:1.7;font-style:italic;white-space:pre-wrap}

/* ---------- Sao danh gia ---------- */
.sao-day{white-space:nowrap;letter-spacing:.5px}
.sao-1{color:var(--line)}
.sao-1.co{color:#f0a132}

/* O cham sao o trang Hanh trinh */
.dg-hop{margin-top:18px}
.dg-doc{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.dg-day{display:flex;gap:4px;font-size:29px;line-height:1}
.dg-sao-1{color:var(--line)}
.dg-sao-1.co{color:#f0a132}
.dg-chon .dg-nut{background:none;border:0;padding:0 2px;cursor:pointer;font-size:29px;
  line-height:1;color:var(--line);font-family:inherit;transition:color .1s,transform .1s}
.dg-chon .dg-nut:hover{transform:scale(1.12)}
.dg-chon .dg-nut.sang{color:#f0a132}
.dg-chon.dang-gui{opacity:.5;pointer-events:none}

/* ---------- Bang xep hang: cot gon lai ---------- */
.bxh-gon th,.bxh-gon td{padding:11px 10px}
.bxh-gon th{white-space:nowrap}
.bxh-c-hang{width:52px}
.bxh-ten{white-space:nowrap}
.bxh-so{text-align:right;white-space:nowrap}
th.bxh-so{text-align:right}

/* ---------- Bang xep hang Top hoc vien ---------- */
.bxh-hang{font-weight:800;color:var(--muted);text-align:center;font-size:12.6px}
.bxh-top .bxh-hang{font-size:16.8px}
.bxh-top td{background:#fdf8f1}
.bxh tbody tr:hover td{background:#faf7f2}

/* ---------- Hop thong bao tren dau trang hanh trinh ---------- */
.tb-box{position:relative;background:linear-gradient(135deg,#3b1e6e,#5a2d9c);color:#fff;
  border-radius:16px;padding:18px 20px;margin:0 0 22px;box-shadow:0 8px 24px rgba(59,30,110,.18)}
.tb-trong{display:flex;gap:16px;align-items:flex-start}
.tb-anh{width:112px;height:112px;object-fit:cover;border-radius:11px;flex:0 0 auto;background:rgba(255,255,255,.12)}
.tb-chu{flex:1;min-width:0}
.tb-nhan{margin:0 0 4px;font-size:9.1px;text-transform:uppercase;letter-spacing:.14em;
  font-weight:800;color:rgba(255,255,255,.68)}
.tb-tieude{margin:0 0 6px;font-size:15.4px;font-weight:800;line-height:1.35;color:#fff}
.tb-noidung{font-size:11.9px;line-height:1.65;color:rgba(255,255,255,.9)}
.tb-noidung p{margin:0 0 7px}
.tb-noidung a{color:#ffbe8a;text-decoration:underline}
.tb-noidung img{max-width:100%;border-radius:8px;margin:8px 0}
.tb-nut{margin-top:11px}
.tb-dong{position:absolute;top:9px;right:11px;background:transparent;border:0;cursor:pointer;
  color:rgba(255,255,255,.6);font-size:20px;line-height:1;padding:4px 7px;border-radius:7px}
.tb-dong:hover{color:#fff;background:rgba(255,255,255,.13)}
@media (max-width:640px){
  .tb-trong{flex-direction:column}
  .tb-anh{width:100%;height:150px}
}

/* ---------- Table ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{border-collapse:collapse;width:100%;font-size:9.8px;min-width:760px}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line-soft);white-space:nowrap}
th{background:#faf7f2;font-weight:700;font-size:8.4px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#fcfaf7}
.pill{display:inline-block;font-size:8px;font-weight:800;padding:3px 9px;border-radius:999px;letter-spacing:.06em}
.pill.basic{background:#f1efec;color:#6b6459}
.pill.pro{background:var(--purple-100);color:var(--purple-700)}
.pill.vip{background:#fef3c7;color:#92400e}
.pill.svip{background:#fce7f3;color:#9d174d}
.pill.truyennghe{background:#dcfce7;color:#166534}

/* ---------- Stats ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(185px,1fr));gap:16px;margin-bottom:26px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.stat .k{font-size:8.4px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700;margin-bottom:8px}
.stat .v{font-size:21px;font-weight:800;letter-spacing:-.02em;line-height:1.1}
.stat .sub{font-size:9.1px;color:var(--muted);margin-top:4px}

/* ---------- Landing ---------- */
.hero{position:relative;isolation:isolate;color:#fff;padding:52px 24px 58px;
  background:var(--purple-900) url(/assets/img/nen-hero.jpg?v=1) center 60%/cover no-repeat}
/* Lop tim phu len anh dong cuu: anh hien ro khoang 45% */
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background:rgba(42,18,89,.55)}
.hero h1,.hero p.lead{text-shadow:0 1px 12px rgba(20,8,45,.55)}
.hero-in{max-width:var(--wrap);margin:0 auto}
.hero h1{color:#fff;max-width:none;text-wrap:pretty}
.hero p.lead{font-size:12.6px;color:#cdbcf2;max-width:34em;margin:0 0 24px;line-height:1.65}

/* Hero hai cot: noi dung ben trai, o dang nhap/dang ky ben phai */
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center}
.hero-card{background:var(--card);color:var(--ink);max-width:none;margin:0}
.hero-card h2{font-size:15px}
@media (max-width:700px){
  .hero-grid{grid-template-columns:1fr;gap:26px}
  .hero{padding:36px 16px 40px}
}
/* 5 goi nam tren MOT hang. Man rong thi thu nho vua khung; man hep hon thi
   giu the o do rong toi thieu va cho cuon ngang, khong xuong dong. */
.price-grid{display:grid;grid-template-columns:repeat(5,minmax(196px,1fr));gap:12px;
  overflow-x:auto;-webkit-overflow-scrolling:touch;scroll-snap-type:x proximity;
  padding:4px 2px 12px;margin:0 -2px}
.price-grid > .price{scroll-snap-align:start}
.price{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:20px 17px;display:flex;flex-direction:column;min-width:0}
.price.hot{border:2px solid var(--accent)}
.price .tier{font-size:9.1px;letter-spacing:.14em;text-transform:uppercase;font-weight:800;color:var(--purple-700);margin-bottom:10px}
.price .amt{font-size:19.6px;font-weight:900;letter-spacing:-.03em;margin-bottom:4px;white-space:nowrap}
.price .per{font-size:9.8px;color:var(--muted);margin-bottom:18px}
.price ul{list-style:none;padding:0;margin:0 0 18px;font-size:9.8px;line-height:1.5;color:var(--ink-2)}
.price li{padding-left:18px;position:relative;margin-bottom:7px}
.price li::before{content:"\2713";position:absolute;left:0;color:var(--accent);font-weight:800}
.price .btn{margin-top:auto;padding-left:12px;padding-right:12px;white-space:nowrap}

/* ---------- Misc ---------- */
.lock-note{background:var(--purple-900);color:#fff;border-radius:var(--radius-lg);padding:30px;text-align:center}
.lock-note h2{color:#fff}
.lock-note p{color:#cdbcf2;max-width:560px;margin:0 auto 20px}
.center{text-align:center}
.spinner{width:26px;height:26px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;margin:40px auto}
@keyframes spin{to{transform:rotate(360deg)}}
.toast{
  position:fixed;left:50%;bottom:28px;transform:translateX(-50%);
  background:var(--purple-900);color:#fff;padding:13px 24px;border-radius:12px;
  font-size:10.5px;font-weight:600;z-index:200;box-shadow:0 10px 30px rgba(0,0,0,.25);
}
.copy-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.moi-ban{border:2px solid #fbc39a;background:linear-gradient(135deg,#fff7ed,#fff)}
.moi-ban-dau{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap}
.mb-50{color:var(--accent-dark)}
/* Popup moi nang cap */
.nc-lop{position:fixed;inset:0;z-index:200;background:rgba(22,16,32,.55);display:flex;align-items:center;justify-content:center;
  padding:16px;animation:ncHien .2s ease}
@keyframes ncHien{from{opacity:0}to{opacity:1}}
.nc-hop{position:relative;background:#fff;border-radius:20px;max-width:520px;width:100%;max-height:92vh;overflow-y:auto;
  padding:28px 28px 22px;box-shadow:0 24px 60px rgba(22,16,32,.3);border-top:6px solid var(--accent)}
.nc-dong{position:absolute;top:10px;right:14px;border:0;background:none;font-size:22px;line-height:1;cursor:pointer;color:var(--muted)}
.nc-bang{width:100%;min-width:0;border-collapse:collapse;font-size:11.9px;margin:6px 0 14px;background:#f0fdf4;border-radius:12px;overflow:hidden}
.nc-bang td{padding:8px 14px;border-bottom:1px solid #dcfce7;white-space:normal}
.nc-bang td:last-child{text-align:right;font-weight:700}
.nc-bang tr.nc-con td{font-weight:900;font-size:15px;color:var(--accent-dark);border-bottom:0}
.nc-ql-tieude{margin:0 0 6px;font-weight:800;color:var(--purple-700);font-size:11.2px}
.nc-ql{margin:0 0 14px;padding-left:20px;font-size:10.5px;line-height:1.6}
.nc-nut{flex-wrap:wrap;gap:10px;margin-top:6px}
/* O "Bai hoc tiep theo" trong hang thong ke */
.bai-tiep{display:flex;flex-direction:column;text-decoration:none;color:inherit;border:2px solid var(--accent);
  transition:transform .15s,box-shadow .15s}
a.bai-tiep:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.bai-tiep.xong{border:1px solid var(--line)}
.bt-dau{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:8px}
.bt-ten{font-weight:800;font-size:11.9px;line-height:1.4;margin-bottom:auto}
.bai-tiep .lesson-state{color:var(--accent-dark)}
.st-tren{font-size:.5em;color:var(--muted);font-weight:700;margin-left:2px}
/* Admin - bieu do DAU */
.hd-cot{display:flex;align-items:flex-end;gap:4px;height:190px;padding-top:8px;overflow-x:auto}
.hd-c{flex:1;min-width:22px;height:100%;display:flex;flex-direction:column;justify-content:flex-end;align-items:center}
.hd-c i{display:block;width:100%;background:var(--accent);border-radius:5px 5px 0 0;min-height:2px}
.hd-c span{font-size:8.4px;color:var(--ink-2);font-weight:700;margin-bottom:2px}
.hd-c em{font-style:normal;font-size:7.7px;color:var(--muted);margin-top:4px;white-space:nowrap}
.hd-c:hover i{background:var(--accent-dark)}
.hd-ba{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;margin-top:22px}
.hd-ba .card + .card{margin-top:0}
.hd-ba table{min-width:0}
.hd-ba th,.hd-ba td{padding:10px 12px}
.mb-qua{margin:12px 0 0;padding:10px 14px;border-radius:11px;background:#f0fdf4;border:1px solid #86efac;font-size:11.2px}
.mb-so{text-align:right}
.mb-so b{display:block;font-size:21px;color:var(--accent-dark);line-height:1.1}
.mb-so span{font-size:9.8px;color:var(--muted)}
.aff-hai{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:22px}
.aff-o{border-radius:16px;padding:20px 22px;border:1px solid var(--line);background:#fff}
.aff-o.tien{border-color:#86efac;background:#f0fdf4}
.aff-o.td{border-color:#fbc39a;background:#fff7ed}
.aff-o .k{font-size:9.8px;letter-spacing:.12em;text-transform:uppercase;font-weight:800;color:var(--muted)}
.aff-o .v{font-size:25px;font-weight:900;margin:4px 0 6px}
.aff-o p{margin:0;font-size:10.5px;color:var(--ink-2)}
.aff-luat{margin:0 0 16px;padding-left:20px;font-size:11.2px;line-height:1.7}
.aff-luat li{margin-bottom:4px}
.copy-row input{flex:1;min-width:240px}

@media (max-width:720px){
  /* iOS tu phong to trang khi o nhap co chu < 16px - giu 16px tren mobile */
  .field input,.field select,.field textarea,.copy-row input{font-size:16px}
  .page{padding:24px 16px 70px}
  .card{padding:22px}
  .topbar-in{padding:12px 16px;gap:12px}
  .topbar-nav{gap:14px;font-size:9.1px}
  .plan-chip{display:none}
  .lesson-body{font-size:11.9px}
  h1{font-size:21px}
  .section-head h2{font-size:16.8px}
  .hero{padding:48px 16px 56px}
}

/* ---------- Review hoc vien o trang chu ---------- */
.hv-review{margin-top:64px}
.hv-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
@media (max-width:900px){.hv-grid{grid-template-columns:1fr}}
.hv-the{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px 22px 18px;display:flex;flex-direction:column;box-shadow:var(--shadow)}
.hv-dau{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.hv-ten{font-size:12.6px}
.hv-chu{margin:0 0 14px;font-size:11.9px;line-height:1.7;font-style:italic;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:7;-webkit-box-orient:vertical;overflow:hidden;flex:1}
.hv-phu{font-size:9.8px;color:var(--muted)}

/* ---------- Hop bat buoc bo sung thong tin ---------- */
.bs-nen{position:fixed;inset:0;z-index:500;background:rgba(22,16,32,.62);display:grid;place-items:center;padding:16px;overflow:auto}
.bs-hop{background:#fff;border-radius:var(--radius-lg);padding:28px;width:100%;max-width:440px;box-shadow:0 20px 60px rgba(0,0,0,.25)}

/* ---------- Bao cao vi mo ---------- */
.chao-hang{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin:0 0 6px}
.bc-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;margin:34px 0 10px;box-shadow:var(--shadow)}
.bc-dau{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.bc-hang{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
@media (max-width:760px){.bc-hang{grid-template-columns:1fr}}
.bc-the{display:flex;flex-direction:column;gap:7px;padding:14px;border:1px solid var(--line);border-radius:13px;
  text-decoration:none;color:inherit;background:#fdfbf8;transition:border-color .15s,transform .15s}
.bc-the:hover{border-color:var(--accent-soft);transform:translateY(-2px)}
.bc-nhan{font-size:9.1px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-dark)}
.bc-ten{font-weight:700;font-size:11.2px;line-height:1.45}
.bc-ngay-nho{font-size:9.1px;color:var(--muted)}

.bc-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;border-bottom:1px solid var(--line);padding-bottom:12px}
.bc-tab{border:1px solid var(--line);background:#fff;border-radius:99px;padding:7px 14px;font-size:10.5px;font-weight:700;
  color:var(--ink-2);cursor:pointer}
.bc-tab.on{background:var(--purple-900);border-color:var(--purple-900);color:#fff}
.bc-item{display:flex;gap:16px;align-items:flex-start;padding:16px 0;border-bottom:1px solid var(--line-soft);flex-wrap:wrap}
.bc-item:last-child{border-bottom:0}
.bc-ngay{font-size:9.8px;color:var(--muted);min-width:82px;padding-top:3px}
.bc-than{flex:1;min-width:240px}
.bc-tieude{font-size:12.6px;margin:0 0 6px}
.bc-noidung{font-size:10.5px;line-height:1.7;color:var(--ink-2)}
.bc-noidung a{color:var(--accent-dark);text-decoration:underline;text-underline-offset:3px;word-break:break-all}
.bc-nut{align-self:center;white-space:nowrap}

/* ---------- Trang ho so ---------- */
.hs-hang-top{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap}
.hs-so{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin-top:18px}
.hs-so > div{background:#faf7f2;border-radius:12px;padding:13px 15px}
.hs-so b{display:block;font-size:15px}
.hs-so span{font-size:9.1px;color:var(--muted)}
.hs-avatar{display:flex;gap:18px;align-items:center;margin:0 0 20px;flex-wrap:wrap}
.hs-anh{width:92px;height:92px;border-radius:50%;object-fit:cover;background:#f1ebe2;border:1px solid var(--line)}
.hs-aff{display:flex;gap:20px;flex-wrap:wrap;align-items:flex-start;margin:16px 0 0}
.hs-ma{font-size:22px;font-weight:900;letter-spacing:.12em;color:var(--accent-dark);margin:0}

.bc-goi{display:inline-block;margin-left:6px;padding:2px 9px;border-radius:99px;font-size:8.4px;font-weight:800;
  letter-spacing:.08em;text-transform:uppercase;color:#fff;vertical-align:middle}
.bc-goi-basic{background:#4c3a8c}
.bc-goi-pro{background:#15803d}
.bc-goi-vip{background:#b45309}
.bc-goi-svip{background:#9a3412}
.bc-goi-tn{background:#6d28d9}
.bc-item.bc-khoa .bc-tieude{color:var(--muted)}
.bc-the-khoa{background:#f6f2fd;border-style:dashed}
.bc-the-khoa .bc-ten{color:var(--muted)}

.hs-gon{font-size:11.2px;line-height:1.65;padding:16px 20px}

/* Cham sao gop vao phan cam nghi cua bai thi */
.dg-thi{margin:-6px 0 18px}
.dg-thi-in{display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:#faf7f2;border:1px solid var(--line);
  border-radius:12px;padding:12px 16px}
.dg-thi-nhan{font-weight:700;font-size:11.2px}

.aff-gon{padding:16px 20px}
.aff-gon .copy-row{margin:0}

/* Tren dien thoai chi hien 1 huy hieu, bam nut moi gian ra du 4 */
.lvl-xem{display:none;width:100%;margin-top:12px}
@media (max-width:680px){
  .lvl-grid{grid-template-columns:1fr}
  .lvl-grid:not(.mo) .lvl-item{display:none}
  .lvl-grid:not(.mo) .lvl-item.noi-bat{display:block}
  .lvl-xem{display:block}
}

/* Hoc bong trong trang ho so */
.hb-dong{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:14px 0;border-bottom:1px solid var(--line-soft)}
.hb-dong:last-of-type{border-bottom:0}
.hb-xong{opacity:.72}
.hb-phan{min-width:58px;height:58px;border-radius:14px;display:grid;place-items:center;background:#fde9bf;
  color:var(--purple-900);font-weight:900;font-size:19px;line-height:1}
.hb-phan span{font-size:9.8px;font-weight:700}
.hb-nhan{font-size:9.8px;font-weight:800;color:var(--muted);white-space:nowrap}
.hb-nhan.hb-con{color:var(--ok)}