/* ============================================================
   Luyện thi Lãnh đạo Quản lý BIDV
   Màu nhận diện thương hiệu BIDV:
     - Chủ đạo : Xanh ngọc lục bảo #006B68  (Pantone 7719 C)
     - Nhấn    : Vàng hoa mai      #FDB71A  (Pantone 1235 C)
   ============================================================ */

:root{
  --green:#006B68;
  --green-700:#005653;
  --green-800:#00403E;
  --green-050:#E7F2F1;
  --green-100:#CFE6E4;
  --yellow:#FDB71A;
  --yellow-600:#E2A110;
  --yellow-050:#FFF7E6;
  --ink:#12211F;
  --ink-2:#4A5C5A;
  --ink-3:#7C8D8B;
  --line:#DCE5E4;
  --bg:#F4F7F7;
  --card:#FFFFFF;
  --ok:#0F7B4F;
  --ok-bg:#E8F6EF;
  --bad:#C0392B;
  --bad-bg:#FDECEA;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(16,40,38,.06), 0 6px 18px rgba(16,40,38,.06);
  --maxw:1080px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  background:var(--bg); color:var(--ink);
  font-size:15px; line-height:1.55;
  -webkit-text-size-adjust:100%;
}
button{font-family:inherit}
a{color:var(--green)}

/* ---------- Header ---------- */
.app-header{
  position:sticky; top:0; z-index:40;
  background:var(--green); color:#fff;
  box-shadow:0 2px 10px rgba(0,0,0,.14);
}
.app-header .bar{
  max-width:var(--maxw); margin:0 auto; padding:10px 16px;
  display:flex; align-items:center; gap:12px;
}
.brand-mark{
  width:48px;height:48px;flex:0 0 48px;border-radius:11px;
  background:#fff; display:grid; place-items:center; padding:3px;
  box-shadow:0 1px 3px rgba(0,0,0,.18);
}
.brand-mark img{display:block; width:100%; height:100%; object-fit:contain}
.brand-text{min-width:0}
.brand-text h1{
  margin:0; font-size:16px; font-weight:600; letter-spacing:.2px;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.brand-text p{margin:1px 0 0; font-size:12px; color:#CDE6E4}
.app-header .spacer{flex:1}
.hbtn{
  background:rgba(255,255,255,.12); color:#fff; border:1px solid rgba(255,255,255,.25);
  border-radius:9px; padding:7px 12px; font-size:13px; cursor:pointer;
}
.hbtn:hover{background:rgba(255,255,255,.22)}
.hbtn.accent{background:var(--yellow); color:#3A2A00; border-color:var(--yellow); font-weight:600}
.hbtn.accent:hover{background:#FFC63F}
.app-header .nav{display:flex; align-items:center; gap:10px}
.hbtn[disabled]{opacity:.5; cursor:default}

/* ---------- Layout ---------- */
.wrap{max-width:var(--maxw); margin:0 auto; padding:18px 16px 90px}
.view{display:none}
.view.active{display:block}
.card{
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  padding:18px; box-shadow:var(--shadow); margin-bottom:16px;
}
.card h2{margin:0 0 4px; font-size:17px; font-weight:600}
.card .hint{margin:0 0 14px; font-size:13px; color:var(--ink-3)}
.step{display:flex; align-items:center; gap:10px; margin-bottom:12px}
.step .num{
  width:24px;height:24px;border-radius:50%;background:var(--green-050);color:var(--green);
  display:grid;place-items:center;font-size:12px;font-weight:700;flex:0 0 24px;
}
.step .lbl{font-size:14px;font-weight:600;color:var(--green-800)}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(135deg,var(--green) 0%,var(--green-700) 100%);
  color:#fff; border-radius:var(--radius); padding:22px 20px; margin-bottom:16px;
  position:relative; overflow:hidden;
}
.hero::after{
  content:""; position:absolute; right:-40px; top:-40px; width:170px; height:170px;
  border-radius:50%; background:rgba(253,183,26,.16);
}
.hero h2{margin:0 0 6px; font-size:20px; font-weight:600; position:relative}
.hero p{margin:0; font-size:13.5px; color:#CFE8E6; position:relative; max-width:640px}
.hero .stats{display:flex; flex-wrap:wrap; gap:10px; margin-top:16px; position:relative}
.hero .stat{
  background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.2);
  border-radius:10px; padding:8px 13px; min-width:96px;
}
.hero .stat b{display:block; font-size:19px; font-weight:600; color:var(--yellow)}
.hero .stat span{font-size:11.5px; color:#CFE8E6}

/* ---------- Chips / toggles ---------- */
.chips{display:flex; flex-wrap:wrap; gap:8px}
.chip{
  border:1px solid var(--line); background:#fff; color:var(--ink-2);
  border-radius:999px; padding:7px 14px; font-size:13px; cursor:pointer; transition:.15s;
}
.chip:hover{border-color:var(--green); color:var(--green)}
.chip.on{background:var(--green); border-color:var(--green); color:#fff; font-weight:600}
.chip.on.acc{background:var(--yellow); border-color:var(--yellow); color:#3A2A00}

.mode-grid{display:grid; grid-template-columns:1fr 1fr; gap:12px}
.mode{
  border:1.5px solid var(--line); background:#fff; border-radius:var(--radius);
  padding:16px; cursor:pointer; text-align:left; transition:.15s;
}
.mode:hover{border-color:var(--green-100); background:var(--green-050)}
.mode.on{border-color:var(--green); background:var(--green-050); box-shadow:0 0 0 3px rgba(0,107,104,.09)}
.mode .ico{
  width:34px;height:34px;border-radius:9px;background:var(--green);display:grid;place-items:center;
  margin-bottom:9px;
}
.mode.acc .ico{background:var(--yellow)}
.mode b{display:block; font-size:14.5px; margin-bottom:2px}
.mode span{font-size:12.5px; color:var(--ink-3)}

/* ---------- Topic list ---------- */
.topic-tools{display:flex; gap:8px; flex-wrap:wrap; margin-bottom:10px}
.input{
  flex:1; min-width:180px; border:1px solid var(--line); border-radius:10px;
  padding:9px 12px; font-size:13.5px; outline:none; background:#fff; color:var(--ink);
}
.input:focus{border-color:var(--green); box-shadow:0 0 0 3px rgba(0,107,104,.1)}
.topic-box{max-height:300px; overflow:auto; border:1px solid var(--line); border-radius:var(--radius-sm)}
.tgroup{font-size:11px; text-transform:uppercase; letter-spacing:.6px; color:var(--ink-3);
  padding:9px 12px 5px; background:#FAFCFC; border-bottom:1px solid var(--line); font-weight:700}
.trow{
  display:flex; align-items:center; gap:10px; padding:9px 12px;
  border-bottom:1px solid var(--line); cursor:pointer; font-size:13.5px;
}
.trow:last-child{border-bottom:none}
.trow:hover{background:var(--green-050)}
.trow.on{background:var(--green-050)}
.trow .cb{
  width:18px;height:18px;border-radius:5px;border:1.5px solid #B9C7C6;flex:0 0 18px;
  display:grid;place-items:center;background:#fff;
}
.trow.on .cb{background:var(--green);border-color:var(--green)}
.trow .cb svg{opacity:0}
.trow.on .cb svg{opacity:1}
.trow .nm{flex:1; min-width:0}
.trow .ct{font-size:11.5px; color:var(--ink-3); white-space:nowrap}

/* ---------- Actions ---------- */
.btn{
  border:none; border-radius:11px; padding:13px 22px; font-size:15px; font-weight:600;
  cursor:pointer; transition:.15s;
}
.btn-primary{background:var(--green); color:#fff; width:100%}
.btn-primary:hover{background:var(--green-700)}
.btn-primary:disabled{background:#C3D2D1; cursor:not-allowed}
.btn-accent{background:var(--yellow); color:#3A2A00}
.btn-accent:hover{background:#FFC63F}
.btn-ghost{background:#fff; border:1px solid var(--line); color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--green); color:var(--green)}
.btn-row{display:flex; gap:10px; flex-wrap:wrap}
.summary-line{
  font-size:13px; color:var(--ink-2); background:var(--yellow-050);
  border:1px solid #F5E2B8; border-radius:10px; padding:10px 13px; margin-bottom:14px;
}
.summary-line b{color:var(--green-800)}

/* ---------- Quiz ---------- */
.quiz-top{
  display:flex; align-items:center; gap:12px; margin-bottom:12px; flex-wrap:wrap;
}
.quiz-top .meta{font-size:12.5px; color:var(--ink-3)}
.quiz-top .meta b{color:var(--green)}
.progress{height:7px; background:var(--green-050); border-radius:99px; overflow:hidden; margin-bottom:16px}
.progress i{display:block; height:100%; background:var(--yellow); width:0; transition:width .25s}

.q-card{background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:18px; box-shadow:var(--shadow)}
.q-tags{display:flex; flex-wrap:wrap; gap:6px; margin-bottom:12px}
.tag{font-size:11px; padding:3px 9px; border-radius:99px; background:var(--green-050); color:var(--green); font-weight:600}
.tag.y{background:var(--yellow-050); color:#8A6400}
.q-stem{font-size:15.5px; font-weight:600; line-height:1.6; margin:0 0 16px}
.opts{display:flex; flex-direction:column; gap:9px}
.opt{
  display:flex; gap:11px; align-items:flex-start; text-align:left;
  border:1.5px solid var(--line); background:#fff; border-radius:11px;
  padding:12px 14px; cursor:pointer; font-size:14px; line-height:1.5; transition:.13s;
}
.opt:hover{border-color:var(--green-100); background:var(--green-050)}
.opt .key{
  width:24px;height:24px;flex:0 0 24px;border-radius:7px;background:var(--green-050);color:var(--green);
  display:grid;place-items:center;font-weight:700;font-size:12.5px;
}
.opt.sel{border-color:var(--green); background:var(--green-050)}
.opt.sel .key{background:var(--green); color:#fff}
.opt.correct{border-color:var(--ok); background:var(--ok-bg)}
.opt.correct .key{background:var(--ok); color:#fff}
.opt.wrong{border-color:var(--bad); background:var(--bad-bg)}
.opt.wrong .key{background:var(--bad); color:#fff}
.opt[disabled]{cursor:default}
.explain{
  margin-top:14px; border-left:3px solid var(--yellow); background:var(--yellow-050);
  padding:10px 14px; border-radius:0 10px 10px 0; font-size:13.5px; color:#5A4A16;
}
.explain b{color:#8A6400}

/* ---------- Khối "Câu hỏi đầy đủ" trong phần diễn giải đáp án ---------- */
.full-q{margin-top:12px; padding-top:11px; border-top:1px dashed rgba(0,0,0,.14)}
.full-q > b{display:block; margin-bottom:7px}
.fq-stem{font-size:14px; font-weight:600; line-height:1.55; margin:0 0 8px; color:var(--ink)}
.fq-opts{display:flex; flex-direction:column; gap:4px}
.fq-opt{font-size:13.5px; line-height:1.55; color:var(--ink-2); padding-left:2px}
.fq-opt .k{font-weight:700; color:var(--green)}
.wrong-item > .full-q{margin-top:2px; padding-top:0; border-top:0}

.quiz-nav{display:flex; gap:10px; margin-top:16px}
.quiz-nav .btn{flex:1}
.qlabel{font-size:13px; color:var(--ink-3); text-align:center; margin-top:10px}

/* ---------- Result ---------- */
.score-wrap{display:flex; align-items:center; gap:20px; flex-wrap:wrap}
.score-ring{
  width:118px;height:118px;flex:0 0 118px;border-radius:50%;
  display:grid;place-items:center; position:relative;
}
.score-ring .in{
  width:92px;height:92px;border-radius:50%;background:#fff;display:grid;place-items:center;flex-direction:column;
}
.score-ring .in b{font-size:27px; line-height:1; color:var(--green)}
.score-ring .in span{font-size:11px; color:var(--ink-3); margin-top:3px}
.score-info{flex:1; min-width:200px}
.score-info .verdict{font-size:18px; font-weight:600; margin:0 0 6px}
.score-info .sub{font-size:13.5px; color:var(--ink-2); margin:0}
.res-stats{display:grid; grid-template-columns:repeat(auto-fit,minmax(110px,1fr)); gap:10px; margin-top:16px}
.res-stat{background:var(--green-050); border-radius:11px; padding:11px 13px}
.res-stat b{display:block; font-size:19px; color:var(--green)}
.res-stat.ok b{color:var(--ok)} .res-stat.bad b{color:var(--bad)}
.res-stat span{font-size:11.5px; color:var(--ink-2)}

.wrong-item{border:1px solid var(--line); border-radius:var(--radius-sm); padding:14px; margin-bottom:11px; background:#fff}
.wrong-item .stem{font-size:14px; font-weight:600; margin:0 0 10px; line-height:1.55}
.ans-line{font-size:13.5px; margin:4px 0; display:flex; gap:8px; align-items:flex-start}
.ans-line .k{font-weight:700; flex:0 0 auto}
.ans-line.bad{color:var(--bad)} .ans-line.ok{color:var(--ok)}
.ans-line .txt{color:var(--ink-2)}

/* ---------- Essay ---------- */
.essay-item{border:1px solid var(--line); border-radius:var(--radius-sm); margin-bottom:10px; overflow:hidden; background:#fff}
.essay-head{padding:14px; cursor:pointer; display:flex; gap:12px; align-items:flex-start}
.essay-head:hover{background:var(--green-050)}
.essay-head .code{
  font-size:11.5px; font-weight:700; background:var(--green); color:#fff;
  padding:3px 9px; border-radius:99px; flex:0 0 auto;
}
.essay-head .body{flex:1; min-width:0}
.essay-head .q{font-size:14px; font-weight:600; margin:0 0 5px; line-height:1.55}
.essay-head .meta{font-size:12px; color:var(--ink-3)}
.badge{font-size:10.5px; padding:2px 8px; border-radius:99px; font-weight:700; margin-left:6px}
.badge.du{background:var(--ok-bg); color:var(--ok)}
.badge.mp{background:var(--yellow-050); color:#8A6400}
.badge.cxd{background:var(--bad-bg); color:var(--bad)}
.essay-body{display:none; padding:0 14px 16px; border-top:1px solid var(--line); background:#FCFEFE}
.essay-body.open{display:block}
.outline{font-size:13.8px; line-height:1.7; color:var(--ink-2)}
.outline h4{
  font-size:13px; color:var(--green); margin:16px 0 7px; text-transform:none;
  border-bottom:1px solid var(--green-050); padding-bottom:5px; font-weight:700;
}
.outline p{margin:0 0 9px}
.outline ul{margin:0 0 11px; padding-left:20px}
.outline li{margin-bottom:5px}
.outline strong{color:var(--ink); font-weight:600}
.outline table{border-collapse:collapse; width:100%; margin:10px 0; font-size:12.5px}
.outline td{border:1px solid var(--line); padding:6px 9px; vertical-align:top}
.outline tr:first-child td{background:var(--green-050); font-weight:600; color:var(--green-800)}

/* ---------- Empty ---------- */
.empty{text-align:center; padding:40px 20px; color:var(--ink-3); font-size:14px}
.empty .big{font-size:34px; margin-bottom:8px}

/* ---------- Bank table ---------- */
.bank-note{font-size:13px; color:var(--ink-2); margin:0 0 14px}
.bank-item{border:1px solid var(--line); border-radius:var(--radius-sm); padding:13px; margin-bottom:10px; background:#fff}
.bank-item .stem{font-size:13.5px; font-weight:600; margin:0 0 6px}
.bank-item .meta{font-size:12px; color:var(--ink-3)}

/* ---------- Toast ---------- */
.toast{
  position:fixed; left:50%; bottom:26px; transform:translateX(-50%) translateY(20px);
  background:var(--green-800); color:#fff; padding:11px 18px; border-radius:11px;
  font-size:13.5px; opacity:0; pointer-events:none; transition:.25s; z-index:80; max-width:90vw;
}
.toast.show{opacity:1; transform:translateX(-50%) translateY(0)}

/* ---------- Footer ---------- */
.app-foot{
  max-width:var(--maxw); margin:0 auto; padding:0 16px 26px;
  font-size:11.5px; color:var(--ink-3); text-align:center;
}
.app-foot .sw{display:inline-flex; gap:5px; align-items:center; vertical-align:middle; margin:0 4px}
.app-foot .sw i{width:11px;height:11px;border-radius:3px;display:inline-block}

/* ---------- Bổ sung: dạng câu hỏi ---------- */
.tag.n{background:#EEF1F1; color:var(--ink-2)}
.trow .ct i.warn{font-style:normal; color:var(--yellow-600); font-weight:600}
.trow .ct b{color:var(--ink-2)}

.opt.static{cursor:default; background:#FAFCFC}
.opt.static:hover{border-color:var(--line); background:#FAFCFC}
.opt .ord{
  margin-left:auto; flex:0 0 auto; width:22px; height:22px; border-radius:50%;
  background:var(--yellow); color:#3A2A00; font-size:12px; font-weight:700;
  display:grid; place-items:center;
}
.opts.multi .opt .key{border-radius:6px}

.explain b.ok{color:var(--ok)}
.explain b.bad{color:var(--bad)}
.explain i{color:#7A6420}

.wrong-item.short{border-left:3px solid var(--yellow); background:#FFFDF7}

.bank-item .badge{display:inline-block; vertical-align:middle}
.bank-item .badge.ok{background:var(--ok-bg); color:var(--ok)}
.bank-item .badge.mp{background:var(--yellow-050); color:#8A6400}
.bank-item .badge.bad{background:var(--bad-bg); color:var(--bad)}

/* ---------- Lịch sử luyện tập ---------- */
.hist-stats{display:flex; flex-wrap:wrap; gap:10px; margin:0 0 14px}
.hist-stats .hs{
  flex:1 1 130px; min-width:0; background:var(--green-050);
  border:1px solid var(--green-100); border-radius:11px; padding:10px 12px;
}
.hist-stats .hs b{display:block; font-size:19px; color:var(--green); line-height:1.2}
.hist-stats .hs span{font-size:12px; color:var(--ink-3)}

.hist-item{border:1px solid var(--line); border-radius:var(--radius-sm); padding:14px; margin-bottom:11px; background:#fff}
.hist-head{display:flex; align-items:flex-start; gap:12px; margin-bottom:10px}
.hist-when{flex:1; min-width:0}
.hist-when b{display:block; font-size:14.5px}
.hist-when span{display:block; font-size:12.5px; color:var(--ink-3); margin-top:2px; line-height:1.45}
.hist-score{
  flex:0 0 auto; background:var(--green); color:#fff; border-radius:10px;
  padding:6px 12px; text-align:center; line-height:1.1;
}
.hist-score b{font-size:17px}
.hist-score span{display:block; font-size:11px; opacity:.85}
.hist-score.low{background:var(--bad)}
.hist-score.none{background:var(--ink-3)}

.hist-row{display:flex; flex-wrap:wrap; gap:6px; margin-bottom:11px}
.hist-row .hs2{
  font-size:12px; border-radius:20px; padding:3px 10px;
  background:var(--bg); color:var(--ink-2); border:1px solid var(--line);
}
.hist-row .hs2.ok{background:var(--ok-bg); color:var(--ok); border-color:transparent}
.hist-row .hs2.bad{background:var(--bad-bg); color:var(--bad); border-color:transparent}

.hist-item .btn-row{margin:0}
.hist-qs{display:none; margin-top:12px; border-top:1px dashed var(--line); padding-top:6px}
.hist-qs.open{display:block}
.hq{display:flex; gap:9px; align-items:flex-start; padding:9px 0; border-bottom:1px solid var(--bg)}
.hq:last-child{border-bottom:0}
.hq .mark{
  flex:0 0 22px; width:22px; height:22px; border-radius:7px; margin-top:1px;
  display:grid; place-items:center; font-size:12px; font-weight:700;
}
.hq .mark.ok{background:var(--ok-bg); color:var(--ok)}
.hq .mark.bad{background:var(--bad-bg); color:var(--bad)}
.hq .mark.n{background:var(--bg); color:var(--ink-3)}
.hq .body{min-width:0; flex:1}
.hq .q{font-size:13.5px; font-weight:600; margin:0 0 3px; line-height:1.5}
.hq .m{font-size:12px; color:var(--ink-3); margin:0}
.hq .a{font-size:12.5px; margin:4px 0 0; color:var(--ink-2)}
.hq .a .bad{color:var(--bad); font-weight:600}
.hq .a .ok{color:var(--ok); font-weight:600}
.qtitle{background:var(--yellow-050); color:#8A6400; border-radius:6px; padding:2px 7px; font-weight:600}

/* ---------- Mobile ---------- */
@media (max-width:640px){
  body{font-size:14.5px}
  .wrap{padding:14px 12px 80px}
  .card{padding:15px; border-radius:12px}
  .hero{padding:18px 16px}
  .hero h2{font-size:17.5px}
  .mode-grid{grid-template-columns:1fr}
  .brand-text h1{font-size:14.5px}
  .brand-text p{font-size:11px}
  .brand-mark{width:42px;height:42px;flex:0 0 42px;border-radius:10px;padding:2px}
  .app-header .bar{flex-wrap:wrap; row-gap:9px}
  .app-header .spacer{display:none}
  .brand-text{flex:1 1 auto}
  .app-header .nav{flex:1 1 100%; gap:8px}
  .app-header .nav .hbtn{flex:1; padding:7px 6px; font-size:12.5px; white-space:nowrap}
  .hist-stats .hs{flex:1 1 45%}
  .hist-item{padding:12px}
  .hist-head{flex-direction:column; gap:8px}
  .hist-score{align-self:flex-start}
  .score-ring{width:100px;height:100px;flex:0 0 100px}
  .score-ring .in{width:78px;height:78px}
  .score-ring .in b{font-size:23px}
  .quiz-nav{position:sticky; bottom:0; background:var(--bg); padding:10px 0 2px}
  .q-stem{font-size:15px}
  .opt{font-size:13.5px; padding:11px 12px}
  .hero .stat{min-width:0; flex:1}
}
@media (min-width:900px){
  .wrap{padding-top:24px}
}