:root{
    --ink:#101828;
    --paper:#F7F8FB;
    --card:#FFFFFF;
    --navy:#012169;
    --navy-deep:#001445;
    --navy-light:#E8EDF9;
    --red:#E4002B;
    --red-light:#FDE8EC;
    --marker:#FFD9DE;
    --muted:#5B6474;
    --line:#E3E6EC;
    --b1:#D6E0F5; --b2:#9FB4E8; --b3:#5C7FD6; --b4:#2C4FA3; --b5:#012169;
    --radius:12px;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  @media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto} *{transition:none!important;animation:none!important} }
  body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    background:var(--paper); color:var(--ink); line-height:1.6;
    font-variant-numeric: tabular-nums;
  }
  .wrap{max-width:960px;margin:0 auto;padding:0 20px}

  /* Header */
  header{padding:28px 0 8px;border-top:4px solid var(--navy)}
  .brand{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
  .brand h1{font-size:26px;font-weight:800;letter-spacing:-0.5px;color:var(--navy)}
  .brand h1 .oz{color:var(--red)}
  .tagline{color:var(--muted);font-size:15px;margin-top:4px}

  /* Nav tabs */
  nav{display:flex;gap:6px;margin:20px 0 0;border-bottom:2px solid var(--line);flex-wrap:wrap}
  nav button{
    appearance:none;border:none;background:none;cursor:pointer;
    font-size:15px;font-weight:600;color:var(--muted);
    padding:10px 14px;border-bottom:3px solid transparent;margin-bottom:-2px;
  }
  nav button.active{color:var(--navy);border-bottom-color:var(--red)}
  nav button:focus-visible{outline:3px solid var(--navy);outline-offset:2px;border-radius:6px}

  main{padding:26px 0 60px}
  section[hidden]{display:none}
  .card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:18px}
  h2{font-size:20px;font-weight:800;letter-spacing:-0.3px;margin-bottom:4px;color:var(--navy)}
  .sub{color:var(--muted);font-size:14px;margin-bottom:16px}
  .hl{background:linear-gradient(transparent 60%, var(--marker) 60%);padding:0 1px;font-weight:600}

  /* Calculator controls */
  .controls{display:flex;gap:18px;align-items:flex-end;flex-wrap:wrap;margin-bottom:8px}
  .field label{display:block;font-weight:700;font-size:13px;color:var(--muted);margin-bottom:4px}
  #salaryInput{
    font-size:22px;font-weight:800;color:var(--navy);
    border:2px solid var(--line);border-radius:10px;padding:8px 12px;width:170px;
    font-variant-numeric:tabular-nums;background:var(--card);
  }
  select{
    font-size:15px;font-weight:700;color:var(--navy);background:var(--card);
    border:2px solid var(--line);border-radius:10px;padding:10px 12px;cursor:pointer;
  }
  #salaryInput:focus-visible, select:focus-visible{outline:3px solid var(--navy-light);border-color:var(--navy)}
  #salarySlider{width:100%;accent-color:var(--navy);margin:12px 0 22px;height:24px}

  .bar{display:flex;width:100%;height:44px;border-radius:10px;overflow:hidden;border:1px solid var(--line)}
  .bar .seg{height:100%;transition:width .25s ease;min-width:0}
  .seg-label-row{display:flex;gap:14px;flex-wrap:wrap;margin:10px 0 4px;font-size:12.5px;color:var(--muted)}
  .seg-label-row .key{display:flex;align-items:center;gap:6px}
  .seg-label-row .sw{width:12px;height:12px;border-radius:3px;display:inline-block}

  table{width:100%;border-collapse:collapse;font-size:14.5px;margin-top:14px}
  th{text-align:left;color:var(--muted);font-weight:600;font-size:13px;border-bottom:2px solid var(--line);padding:8px 6px}
  td{padding:9px 6px;border-bottom:1px solid var(--line)}
  td.num, th.num{text-align:right;font-variant-numeric:tabular-nums}
  tr.total td{font-weight:800;border-bottom:none}
  .tax-amt{color:var(--red);font-weight:600}

  .results{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-top:18px}
  .stat{background:var(--navy-light);border-radius:10px;padding:14px 16px}
  .stat .k{font-size:12.5px;color:var(--navy);font-weight:700;text-transform:uppercase;letter-spacing:.4px}
  .stat .v{font-size:22px;font-weight:800;color:var(--navy);margin-top:2px}
  .stat .s{font-size:12.5px;color:var(--muted)}

  .compare{border:1.5px solid var(--navy);border-radius:10px;padding:14px 18px;margin-top:16px;font-size:14.5px;background:var(--card)}
  .compare .delta-less{color:var(--navy);font-weight:800}
  .compare .delta-more{color:var(--red);font-weight:800}
  .why{background:var(--red-light);border:1px solid #F4C2CC;border-radius:10px;padding:12px 16px;font-size:14px;margin-top:16px}

  /* Learn */
  .module-head{margin:18px 0 10px}
  .module-head h3{font-size:16px;font-weight:800;color:var(--navy)}
  .module-head span{font-size:13px;color:var(--muted)}
  details{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);margin-bottom:12px;overflow:hidden}
  details summary{
    cursor:pointer;padding:16px 20px;font-weight:700;font-size:16px;list-style:none;
    display:flex;justify-content:space-between;align-items:center;gap:10px;
  }
  details summary::-webkit-details-marker{display:none}
  details summary:focus-visible{outline:3px solid var(--navy-light);outline-offset:-3px}
  details summary::after{content:"+";font-size:20px;color:var(--red);font-weight:800}
  details[open] summary::after{content:"–"}
  details .body{padding:0 20px 18px;font-size:15px;color:#2B3648}
  details .body p{margin-bottom:10px}
  details .body ul{margin:0 0 10px 20px}
  .tip{background:var(--navy-light);border-radius:8px;padding:10px 14px;font-size:13.5px;color:var(--navy);margin-top:6px}

  /* Quiz */
  .q{margin-bottom:20px}
  .q .qt{font-weight:700;margin-bottom:10px;font-size:15.5px}
  .opts{display:grid;gap:8px}
  .opts button{
    text-align:left;font-size:14.5px;padding:11px 14px;border-radius:10px;cursor:pointer;
    border:1.5px solid var(--line);background:var(--card);color:var(--ink);
  }
  .opts button:hover{border-color:var(--navy)}
  .opts button:focus-visible{outline:3px solid var(--navy-light)}
  .opts button.correct{background:var(--navy-light);border-color:var(--navy);font-weight:700}
  .opts button.wrong{background:var(--red-light);border-color:var(--red)}
  .opts button:disabled{cursor:default}
  .expl{font-size:13.5px;color:var(--muted);margin-top:8px;display:none}
  .expl.show{display:block}
  .score{font-size:17px;font-weight:800;color:var(--navy);margin-top:6px}
  .reset{margin-top:10px;background:var(--navy);color:#fff;border:none;border-radius:10px;padding:10px 18px;font-size:14.5px;font-weight:700;cursor:pointer}
  .reset:focus-visible{outline:3px solid var(--navy-light)}

  /* News */
  .news-item{border-bottom:1px solid var(--line);padding:14px 0}
  .news-item:last-child{border-bottom:none}
  .news-item .src{font-size:12px;font-weight:700;color:var(--red);text-transform:uppercase;letter-spacing:.5px}
  .news-item .nt{font-weight:700;font-size:15.5px;margin:2px 0}
  .news-item .ns{font-size:14px;color:var(--muted)}
  .badge{display:inline-block;font-size:11.5px;font-weight:700;background:var(--navy);color:#fff;border-radius:999px;padding:2px 10px;margin-left:8px}

  .ato-link{margin-top:10px;font-size:13.5px}
  .ato-link a{color:var(--navy);font-weight:700;text-decoration:none;border-bottom:1.5px solid var(--red)}
  .ato-link a:hover{color:var(--red)}
  .ato-link a:focus-visible{outline:3px solid var(--navy-light)}
  .chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
  .chips button{
    font-size:13px;font-weight:700;color:var(--navy);background:var(--card);
    border:1.5px solid var(--line);border-radius:999px;padding:5px 14px;cursor:pointer;
  }
  .chips button.on{background:var(--navy);color:#fff;border-color:var(--navy)}
  .chips button:focus-visible{outline:3px solid var(--navy-light)}

  footer{border-top:1px solid var(--line);padding:18px 0 40px;font-size:12.5px;color:var(--muted)}
  @media(max-width:560px){ .brand h1{font-size:22px} .stat .v{font-size:19px} }