.mtx-wrap,.mtx-wrap *,.mtx-list,.mtx-list *,.mtx-box,.mtx-box *,.mtx-pop,.mtx-pop *{box-sizing:border-box}
.mtx-list,.mtx-box,.mtx-wrap{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;overflow-wrap:anywhere}
.mtx-list{max-width:900px;margin:20px auto;display:grid;gap:18px}
.mtx-box{max-width:900px;margin:20px auto;padding:18px;background:#fff;border-radius:12px;box-shadow:0 4px 18px rgba(15,23,42,.08)}
.mtx-loading{padding:30px;text-align:center;color:#64748b}
/* cards */
.mtx-card{position:relative;background:#fff;border-radius:12px;box-shadow:0 4px 18px rgba(15,23,42,.09);overflow:hidden}
.mtx-card:before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:linear-gradient(90deg,#6366f1,#3b82f6 50%,#16a34a)}
.mtx-row{display:flex;gap:16px;align-items:center;justify-content:space-between;padding:22px 24px 16px;flex-wrap:wrap}
.mtx-info{flex:1 1 320px;min-width:0}
.mtx-badges{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:10px}
.mtx-bd{font-size:11px;font-weight:800;letter-spacing:.3px;padding:6px 11px;border-radius:6px;line-height:1}
.mtx-bd.live{background:#dc2626;color:#fff}.mtx-bd.free{background:#16a34a;color:#fff}.mtx-bd.paid{background:#ea580c;color:#fff}
.mtx-bd.d-medium{background:#fef3c7;color:#b45309}.mtx-bd.d-hard{background:#fee2e2;color:#dc2626}.mtx-bd.d-easy{background:#dcfce7;color:#166534}
.mtx-bd.neg{background:#fef2f2;color:#dc2626;font-weight:700}
.mtx-bd.lock{background:none;padding:0;font-size:14px}
.mtx-card h3{margin:0 0 8px;font-size:15px;color:#0f172a;line-height:1.3}
.mtx-card h3 small{font-weight:600;color:#f59e0b;margin-left:6px;font-size:12px}
.mtx-meta{display:flex;gap:6px 16px;font-size:12px;color:#94a3b8;flex-wrap:wrap}
.mtx-btn{display:inline-block;background:linear-gradient(180deg,#22c55e,#16a34a);color:#fff!important;border:0;border-radius:8px;padding:15px 34px;min-width:230px;text-align:center;font-weight:700;font-size:14px;cursor:pointer;text-decoration:none!important;box-shadow:0 3px 8px rgba(22,163,74,.25);font-family:inherit;line-height:1.2}
.mtx-btn.pay{background:linear-gradient(180deg,#fb923c,#ea580c);box-shadow:0 3px 8px rgba(234,88,12,.25)}
.mtx-btn.sec{background:#e2e8f0;color:#0f172a!important;box-shadow:none}
.mtx-btn.dis,.mtx-btn:disabled{opacity:.5;cursor:not-allowed;pointer-events:none}
.mtx-foot{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;font-size:12px;color:#94a3b8;background:#f8fafc;padding:11px 24px}
.mtx-foot span:first-child{color:#2563eb;font-weight:600}.mtx-foot span:nth-child(2){text-align:center}
.mtx-foot a.mtx-share{color:#16a34a;font-weight:700;text-decoration:none;justify-self:end}
.mtx-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.mtx-lb{width:100%;border-collapse:collapse;font-size:14px}
.mtx-lb th,.mtx-lb td{padding:9px 10px;border-bottom:1px solid #e2e8f0;text-align:left}
.mtx-lb th{background:#f1f5f9}.mtx-lb tr.me td{background:#ecfdf5;font-weight:700}
.mtx-lbsel{margin-bottom:12px}.mtx-lbsel select{padding:6px;max-width:100%}
.mtx-loginbtn{background:#1e3a8a;color:#fff!important;padding:9px 18px;border-radius:20px;font-weight:700;font-size:13px;text-decoration:none!important;display:inline-block}
/* popup */
.mtx-pop{position:fixed;inset:0;z-index:1000001;background:rgba(15,23,42,.6);display:flex;align-items:center;justify-content:center;padding:14px;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
.mtx-pbox{background:#fff;border-radius:14px;width:100%;max-width:400px;max-height:94vh;overflow:auto;padding:22px;position:relative}
.mtx-pbox h3{margin:0 0 4px;font-size:20px;color:#0f172a}.mtx-pbox p.sub{margin:0 0 14px;color:#64748b;font-size:13px}
.mtx-tabs{display:flex;gap:6px;margin-bottom:14px}
.mtx-tabs button{flex:1;padding:10px;border:0;border-radius:8px;background:#e2e8f0;font-weight:700;cursor:pointer;font-family:inherit}
.mtx-tabs button.on{background:#1e3a8a;color:#fff}
.mtx-pbox label{display:block;font-size:13px;font-weight:600;margin:10px 0 4px;color:#334155}
.mtx-pbox input{width:100%;padding:12px;border:1px solid #cbd5e1;border-radius:8px;font-size:16px;font-family:inherit}
.mtx-pbox .mtx-btn{width:100%;min-width:0;margin-top:16px}
.mtx-pbox .err{color:#dc2626;font-size:13px;margin-top:10px;min-height:18px}
.mtx-pclose{position:absolute;right:10px;top:8px;border:0;background:none;font-size:24px;cursor:pointer;color:#64748b}
/* exam page */
.mtx-wrap{max-width:900px;margin:20px auto}
.mtx-intro{background:#fff;border-radius:12px;box-shadow:0 4px 18px rgba(15,23,42,.08);padding:22px}
.mtx-intro h2{margin:0 0 12px;font-size:22px;color:#0f172a}
.mtx-stat3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:14px 0}
.mtx-stat3>div{background:#f1f5f9;border-radius:10px;padding:12px;text-align:center}
.mtx-stat3 b{display:block;font-size:20px;color:#1e3a8a}.mtx-stat3 span{font-size:12px;color:#64748b}
.mtx-ins{background:#fffbeb;border:1px solid #fde68a;border-radius:10px;padding:12px 12px 12px 28px;font-size:14px;line-height:1.7;margin:12px 0}
.mtx-msg{background:#fef2f2;color:#b91c1c;border-radius:8px;padding:10px 12px;margin:12px 0;font-size:14px}
.mtx-lang{margin:12px 0}.mtx-lang select{padding:8px;font-size:15px;border-radius:8px;border:1px solid #cbd5e1}
.mtx-wrap.running{position:fixed;inset:0;margin:0!important;padding:0!important;max-width:none;z-index:1000000;background:#fff;display:flex;flex-direction:column;-webkit-user-select:none;user-select:none}
.mtx-top{flex:0 0 auto;background:#1e3a8a;color:#fff;display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;justify-content:space-between;padding:8px max(12px,env(safe-area-inset-right)) 8px max(12px,env(safe-area-inset-left));padding-top:max(8px,env(safe-area-inset-top))}
.mtx-ttl{font-weight:700;font-size:15px;flex:1 1 100%;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mtx-tr{flex:1 1 100%;display:flex;align-items:center;gap:8px;justify-content:space-between}
.mtx-timer{background:#fff;color:#1e3a8a;border-radius:8px;padding:6px 12px;font-weight:800;font-size:17px;font-variant-numeric:tabular-nums}
.mtx-secn{font-size:12px;opacity:.9;flex:1;text-align:center}
.mtx-top select{padding:7px;border-radius:8px;border:0;font-size:13px}
.mtx-ibtn{border:0;border-radius:8px;min-width:40px;min-height:36px;font-size:18px;font-weight:700;cursor:pointer;background:#fff;color:#1e3a8a}
.mtx-ibtn.x{background:#dc2626;color:#fff}
.mtx-cols{flex:1 1 auto;display:flex;min-height:0;position:relative}
.mtx-main{flex:1 1 auto;overflow-y:auto;padding:14px 16px;-webkit-overflow-scrolling:touch}
.mtx-qn{font-size:13px;color:#64748b;margin-bottom:8px;display:flex;justify-content:space-between;gap:8px}
.mtx-q{font-size:17px;line-height:1.55;color:#0f172a;margin-bottom:14px}
.mtx-q img,.mtx-opt img{max-width:100%;height:auto;display:block;margin:8px 0}
.mtx-tbl{overflow-x:auto;margin:8px 0}.mtx-tbl table{border-collapse:collapse;font-size:14px}.mtx-tbl td{border:1px solid #cbd5e1;padding:6px 10px}
.mtx-opt{display:flex;gap:12px;align-items:flex-start;border:2px solid #cbd5e1;border-radius:12px;padding:12px;margin-bottom:10px;cursor:pointer;font-size:16px;line-height:1.45;background:#fff}
.mtx-opt .rd{flex:0 0 22px;width:22px;height:22px;border:2px solid #64748b;border-radius:50%;margin-top:1px}
.mtx-opt.sel{border-color:#16a34a;background:#f0fdf4}.mtx-opt.sel .rd{border-color:#16a34a;background:radial-gradient(#16a34a 45%,transparent 50%)}
.mtx-side{flex:0 0 250px;border-left:1px solid #e2e8f0;background:#f8fafc;overflow-y:auto;padding:12px}
.mtx-leg{font-size:11px;color:#475569;display:grid;grid-template-columns:1fr 1fr;gap:4px 8px;margin-bottom:10px}
.mtx-leg i{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:4px;vertical-align:-1px}
.mtx-pal{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.mtx-pal button{height:38px;border:0;border-radius:8px;font-weight:700;font-size:14px;cursor:pointer;background:#e2e8f0;color:#334155;position:relative}
.mtx-pal button.vis{background:#ef4444;color:#fff}.mtx-pal button.ans{background:#16a34a;color:#fff}
.mtx-pal button.mk{background:#7c3aed;color:#fff}.mtx-pal button.mk.ans:after{content:"";position:absolute;right:3px;top:3px;width:8px;height:8px;border-radius:50%;background:#22c55e}
.mtx-pal button.cur{outline:3px solid #1e3a8a;outline-offset:1px}
.mtx-side .mtx-btn{width:100%;min-width:0;margin-top:12px;padding:12px}
.mtx-bd2{display:none}
.mtx-foot2{flex:0 0 auto;display:flex;gap:6px;padding:8px 8px max(8px,env(safe-area-inset-bottom));border-top:1px solid #e2e8f0;background:#fff}
.mtx-foot2 button{flex:1;min-height:46px;border:0;border-radius:10px;font-weight:700;font-size:13px;line-height:1.2;cursor:pointer;background:#e2e8f0;color:#0f172a;font-family:inherit;padding:6px 4px}
.mtx-foot2 button.rv{background:#7c3aed;color:#fff}.mtx-foot2 button.sv{background:#16a34a;color:#fff}
.mtx-foot2 button:disabled{opacity:.45}
.mtx-modal{position:fixed;inset:0;z-index:1000002;background:rgba(15,23,42,.6);display:flex;align-items:center;justify-content:center;padding:14px}
.mtx-mbox{background:#fff;border-radius:14px;max-width:420px;width:100%;padding:20px;font-family:system-ui,sans-serif}
.mtx-mbox h3{margin:0 0 10px}.mtx-mbox .sum{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:12px 0;font-size:14px}
.mtx-mbox .sum div{background:#f1f5f9;border-radius:8px;padding:8px 10px}
.mtx-mbox .btns{display:flex;gap:8px;margin-top:14px}.mtx-mbox .btns .mtx-btn{min-width:0;flex:1;padding:12px}
/* result */
.mtx-res{background:#fff;border-radius:12px;box-shadow:0 4px 18px rgba(15,23,42,.08);padding:20px}
.mtx-res h2{margin:0 0 4px;font-size:22px}
.mtx-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:14px 0}
.mtx-cards>div{background:#f1f5f9;border-radius:10px;padding:12px;text-align:center}
.mtx-cards b{display:block;font-size:20px;color:#1e3a8a}.mtx-cards span{font-size:12px;color:#64748b}
.mtx-acts{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.mtx-acts .mtx-btn{min-width:0;padding:12px 20px}
.mtx-filt{display:flex;gap:6px;flex-wrap:wrap;margin:14px 0 6px}.mtx-filt button{border:0;border-radius:20px;padding:8px 14px;background:#e2e8f0;font-weight:700;cursor:pointer;font-family:inherit}.mtx-filt button.on{background:#1e3a8a;color:#fff}
.mtx-rv{border:1px solid #e2e8f0;border-radius:12px;padding:14px;margin-top:12px}
.mtx-rv .hd{display:flex;justify-content:space-between;gap:8px;font-size:13px;color:#64748b;margin-bottom:8px}
.mtx-rv .chip{font-weight:800;border-radius:6px;padding:3px 8px;font-size:12px}
.mtx-rv .chip.ok{background:#dcfce7;color:#166534}.mtx-rv .chip.no{background:#fee2e2;color:#b91c1c}.mtx-rv .chip.sk{background:#e2e8f0;color:#475569}
.mtx-rv .o{border:2px solid #e2e8f0;border-radius:10px;padding:9px 10px;margin:6px 0;display:flex;gap:8px}
.mtx-rv .o.good{border-color:#16a34a;background:#f0fdf4}.mtx-rv .o.bad{border-color:#dc2626;background:#fef2f2}
.mtx-rv .x{background:#eff6ff;border-radius:8px;padding:10px;margin-top:8px;font-size:14px}
@media(max-width:768px){
  .mtx-row{flex-direction:column;align-items:stretch;padding:18px 14px 14px;gap:14px}
  .mtx-info{flex:0 0 auto}
  .mtx-btn{display:block;width:100%;min-width:0;padding:14px 16px}
  .mtx-foot{padding:10px 14px;font-size:11px}
  .mtx-stat3{grid-template-columns:1fr}
  .mtx-cards{grid-template-columns:repeat(2,1fr)}
  .mtx-bd2.open{display:block;position:absolute;inset:0;z-index:4;background:rgba(15,23,42,.45)}
  .mtx-side{position:absolute;right:0;top:0;bottom:0;width:82%;max-width:320px;z-index:5;transform:translateX(105%);transition:transform .2s;box-shadow:-4px 0 14px rgba(0,0,0,.25);flex:none}
  .mtx-side.open{transform:none}
  .mtx-pal button{height:44px;font-size:15px}
  .mtx-q{font-size:16px}
  .mtx-opt{font-size:15px}
}
@media(min-width:769px){.mtx-ibtn.pbtn{display:none}.mtx-ttl{flex:1 1 auto}.mtx-tr{flex:0 0 auto;gap:14px}.mtx-top{flex-wrap:nowrap}}
@media(max-width:768px) and (orientation:landscape) and (max-height:480px){
  .mtx-top{padding-top:4px}.mtx-q{font-size:15px;margin-bottom:8px}.mtx-opt{padding:8px;margin-bottom:6px}.mtx-foot2 button{min-height:38px}.mtx-pal button{height:36px}
}

/* Mobile-first CBT refinements */
.mtx-wrap.running{height:100vh;height:100dvh;min-height:0;overflow:hidden}
.mtx-wrap.running .mtx-cols{min-height:0;min-width:0}
.mtx-wrap.running .mtx-main{min-width:0;overscroll-behavior:contain}
.mtx-wrap.running .mtx-side{overscroll-behavior:contain}
.mtx-opt{min-width:0;overflow-wrap:anywhere;word-break:normal}
.mtx-q{overflow-wrap:anywhere}
@media(max-width:768px){
  .mtx-wrap{width:100%;max-width:none;margin:10px auto;padding:0 10px}
  .mtx-wrap.running{padding:0!important;width:100%;}
  .mtx-top{gap:5px 8px;padding-left:10px;padding-right:10px}
  .mtx-ttl{font-size:13px;flex:1 1 100%;padding-right:2px}
  .mtx-tr{flex:1 1 100%;gap:6px;min-width:0}
  .mtx-timer{font-size:15px;padding:6px 9px;white-space:nowrap}
  .mtx-secn{font-size:11px;min-width:0}
  .mtx-top select{max-width:105px;min-width:0;padding:6px;font-size:12px}
  .mtx-ibtn{min-width:36px;min-height:34px}
  .mtx-main{padding:12px 12px 16px}
  .mtx-qn{font-size:12px;flex-wrap:wrap}
  .mtx-q{font-size:16px;line-height:1.5;margin-bottom:12px}
  .mtx-opt{gap:9px;padding:11px 10px;margin-bottom:8px;border-radius:10px;font-size:14px;line-height:1.4}
  .mtx-opt .rd{flex-basis:20px;width:20px;height:20px}
  .mtx-foot2{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:5px;padding:6px 6px max(7px,env(safe-area-inset-bottom))}
  .mtx-foot2 button{min-width:0;min-height:42px;font-size:11px;padding:5px 2px;overflow-wrap:anywhere}
  .mtx-side{width:min(82vw,310px);max-width:310px;padding:12px}
  .mtx-pal{grid-template-columns:repeat(5,minmax(0,1fr));gap:6px}
  .mtx-pal button{height:42px;min-width:0;font-size:14px}
  .mtx-intro{padding:16px}
  .mtx-intro h2{font-size:19px}
  .mtx-stat3{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}
  .mtx-stat3>div{padding:9px 4px}
  .mtx-stat3 b{font-size:17px}
  .mtx-stat3 span{font-size:10px}
  .mtx-ins{font-size:13px;line-height:1.55;padding:11px 10px 11px 25px}
  .mtx-btn{min-width:0;max-width:100%;white-space:normal}
}
@media(max-width:380px){
  .mtx-foot2 button{font-size:10px;min-height:40px}
  .mtx-pal{grid-template-columns:repeat(4,minmax(0,1fr))}
  .mtx-top select{max-width:86px}
  .mtx-timer{font-size:14px;padding:5px 7px}
}
@media(max-height:520px) and (max-width:900px){
  .mtx-top{padding-top:max(3px,env(safe-area-inset-top));padding-bottom:4px}
  .mtx-ttl{font-size:12px}
  .mtx-main{padding-top:7px;padding-bottom:8px}
  .mtx-q{margin-bottom:7px;font-size:15px}
  .mtx-opt{padding:7px 9px;margin-bottom:5px}
  .mtx-foot2 button{min-height:34px}
}