:root{
    --bg:#fafaf9; --card:#ffffff; --field:#ffffff; --line:#e7e5e4; --line2:#d6d3d1;
    --text:#292524; --muted:#78716c; --accent:#f59e0b; --accent-ink:#1c1917; --accent-strong:#b45309;
    --green:#059669; --green-bg:#ecfdf5; --green-line:#a7f3d0;
    --blue:#0284c7; --red:#dc2626; --red-bg:#fef2f2; --red-line:#fecaca;
    --radius:14px; --head:'Plus Jakarta Sans',system-ui,sans-serif;
    --shadow:0 1px 2px rgba(15,15,15,.05);
    --shadow-card:0 1px 3px rgba(15,15,15,.06),0 1px 2px rgba(15,15,15,.04);
  }
  *{box-sizing:border-box}
  body{margin:0;font-family:'Plus Jakarta Sans',system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
    background:var(--bg);color:var(--text);line-height:1.55;-webkit-font-smoothing:antialiased}

  /* ---- header ---- */
  header{padding:26px 20px 24px;border-bottom:1px solid var(--line);background:#ffffff}
  .head-in{max-width:980px;margin:0 auto}
  .brand{display:flex;align-items:center;gap:13px}
  .logo{flex:0 0 auto;width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
    background:linear-gradient(160deg,#fbbf24,#f59e0b);color:#fff;box-shadow:0 2px 10px rgba(245,158,11,.35)}
  header h1{margin:0;font-family:var(--head);font-size:23px;font-weight:700;letter-spacing:-.02em;color:var(--text)}
  .brand .sub{margin:2px 0 0;color:var(--accent-strong);font-size:13px;font-weight:600}
  header .lede{margin:16px 0 0;color:var(--muted);font-size:14px;max-width:790px;line-height:1.6}
  header .lede b{color:var(--text);font-weight:600}

  .wrap{max-width:980px;margin:0 auto;padding:24px 20px 48px}
  .grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
  @media(max-width:720px){.grid{grid-template-columns:1fr}}

  /* ---- form ---- */
  fieldset{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);
    margin:0 0 18px;padding:22px 22px 10px;box-shadow:var(--shadow-card)}
  legend{float:left;width:100%;display:flex;align-items:center;gap:11px;padding:0;margin:0 0 6px}
  legend + *{clear:both}
  .legnum{flex:0 0 auto;width:27px;height:27px;border-radius:8px;display:grid;place-items:center;
    background:#fffbeb;box-shadow:inset 0 0 0 1px #fde68a;color:var(--accent-strong);font-weight:700;font-size:13px}
  .legttl{font-family:var(--head);font-weight:700;font-size:17px;color:var(--text);letter-spacing:-.01em}
  legend.grouplabel{display:block;padding:0;margin:0 0 4px;font-weight:600;font-size:13px;color:var(--text)}
  label{display:block;font-size:13px;color:var(--text);font-weight:500;margin:0 0 5px}
  .field{margin:0 0 14px}
  input,select,textarea{width:100%;background:var(--field);border:1px solid var(--line2);
    color:var(--text);border-radius:9px;padding:9px 11px;font-size:14px;font-family:inherit;
    box-shadow:0 1px 2px rgba(15,15,15,.04);transition:border-color .12s,box-shadow .12s}
  input::placeholder,textarea::placeholder{color:#a8a29e}
  input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(245,158,11,.18)}
  /* visible keyboard-focus ring (accessibility) */
  input:focus-visible,select:focus-visible,textarea:focus-visible,
  button:focus-visible,a:focus-visible,[tabindex]:focus-visible{
    outline:2px solid var(--blue);outline-offset:2px}
  textarea{resize:vertical;min-height:54px}
  .fdesc{margin:-2px 0 16px;color:var(--muted);font-size:13.5px;max-width:680px;line-height:1.55}
  .req{color:var(--accent-strong)}
  .err{color:var(--red);font-size:12px;margin-top:5px;display:none;font-weight:500}
  .err.show{display:block}
  input[aria-invalid="true"]{border-color:var(--red);box-shadow:0 0 0 3px rgba(220,38,38,.15)}
  .rank{display:grid;grid-template-columns:1fr 132px;align-items:center;
    gap:10px;padding:9px 0;border-bottom:1px solid var(--line)}
  .rank:last-child{border-bottom:none}
  .rank span{font-size:14px;color:var(--text)}
  .rank select{width:100%}
  .hint{font-size:12px;color:var(--muted);margin-top:4px;line-height:1.5}

  /* ---- buttons ---- */
  .btnrow{display:flex;gap:12px;flex-wrap:wrap;margin:8px 0 0}
  button{cursor:pointer;border:none;border-radius:10px;padding:12px 20px;
    font-size:14.5px;font-weight:600;font-family:inherit;transition:transform .04s,box-shadow .12s,background .12s}
  button:active{transform:translateY(1px)}
  .primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 1px 2px rgba(15,15,15,.12)}
  .primary:hover{background:#ea8f08}
  .ghost{background:#fff;color:#44403c;border:1px solid var(--line2);box-shadow:0 1px 2px rgba(15,15,15,.05)}
  .ghost:hover{background:#fafaf9}
  /* ---- output ---- */
  #out{display:none;margin-top:8px}
  .card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
    padding:22px;margin:0 0 16px;box-shadow:var(--shadow-card)}
  .card h2{display:flex;align-items:center;gap:10px;margin:0 0 14px;font-family:var(--head);
    font-size:17px;font-weight:700;color:var(--text);letter-spacing:-.01em}
  .chico{flex:0 0 auto;width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
    background:#fffbeb;box-shadow:inset 0 0 0 1px #fde68a;color:var(--accent-strong)}
  .chico svg{width:17px;height:17px;display:block}
  .card h3{margin:16px 0 7px;font-family:var(--head);font-size:14px;font-weight:700;color:var(--text)}
  .headline{background:linear-gradient(165deg,#fffbeb,#ffffff);border:1px solid #fde68a;box-shadow:var(--shadow-card)}
  .headline .big{font-family:var(--head);font-size:21px;font-weight:700;line-height:1.3;margin:0 0 10px;color:var(--text);letter-spacing:-.01em}
  .tag{display:inline-block;background:#fafaf9;border:1px solid var(--line);
    border-radius:7px;padding:4px 11px;font-size:12px;margin:0 6px 6px 0;color:#57534e;font-weight:500}
  table{width:100%;border-collapse:collapse;font-size:14px;margin:8px 0}
  th,td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line)}
  th{color:var(--muted);font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.05em}
  td.num{text-align:right;font-variant-numeric:tabular-nums}
  table.ans td:first-child{color:var(--muted);width:54%;vertical-align:top}
  table.ans td:last-child{font-weight:500;text-align:left}
  .anssub{margin:18px 0 4px;font-family:var(--head);font-size:13px;font-weight:700;
    color:var(--accent-strong);letter-spacing:.01em}
  .reportmeta{display:flex;justify-content:space-between;align-items:baseline;
    gap:12px;flex-wrap:wrap;font-size:13px}
  .reportmeta b{font-size:14px;color:var(--text)}
  tr.total td{border-top:2px solid var(--line2);font-weight:700;border-bottom:none}
  tr.grant td{color:var(--green)}
  ul{margin:8px 0;padding-left:20px}
  li{margin:5px 0;font-size:14px;color:var(--text)}
  li::marker{color:var(--accent)}
  .flag{display:flex;gap:11px;align-items:flex-start;background:var(--red-bg);border:1px solid var(--red-line);
    border-radius:10px;padding:12px 14px;margin:8px 0;font-size:13.5px;line-height:1.5;color:var(--text)}
  .flag b{flex:0 0 auto;width:20px;height:20px;border-radius:50%;background:var(--red);color:#fff;
    display:grid;place-items:center;font-size:12px;font-weight:700;margin-top:1px}
  .ok{background:var(--green-bg);border-color:var(--green-line)}
  .ok b{background:var(--green)}
  .pill{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:7px;font-size:12px;font-weight:600}
  .pill.b{background:#e0f2fe;color:#0369a1;box-shadow:inset 0 0 0 1px rgba(2,132,199,.2)}
  .pill.g{background:var(--green-bg);color:#047857;box-shadow:inset 0 0 0 1px rgba(5,150,105,.2)}
  .alt{border-left:3px solid #fde68a;padding:8px 0 8px 14px;margin:10px 0;font-size:14px}
  .alt b{color:var(--text)}
  .muted{color:var(--muted);font-size:13px;line-height:1.55}
  code{background:#f5f5f4;border:1px solid var(--line);border-radius:5px;padding:1px 5px;font-size:12px}
  .disclaimer{font-size:12.5px;color:var(--muted);border-top:1px solid var(--line);
    padding-top:14px;margin-top:12px;line-height:1.6}
  /* ---- system diagram ---- */
  .diagram{width:100%;height:auto;display:block;background:linear-gradient(180deg,#f8fafc,#f1f5f9);border-radius:12px;border:1px solid var(--line)}
  .diagram .wire{fill:none;stroke:#dcd9d5;stroke-width:5;stroke-linecap:round}
  .diagram .flow{fill:none;stroke:#10b981;stroke-width:3.2;stroke-linecap:round;
    stroke-dasharray:7 13;animation:flow 1s linear infinite;filter:drop-shadow(0 0 2px rgba(16,185,129,.45))}
  .diagram .node{fill:#ffffff;stroke:#e7e5e4;stroke-width:1.5}
  .diagram .lbl{fill:#78716c;font-size:13px;font-family:'Plus Jakarta Sans',system-ui,sans-serif}
  .diagram .val{fill:#292524;font-size:14px;font-weight:700;font-family:'Plus Jakarta Sans',system-ui,sans-serif}
  .diagram .sun-glow{animation:sunpulse 3.5s ease-in-out infinite;transform-origin:center;transform-box:fill-box}
  .diagram .sun-rays{animation:sunrays 60s linear infinite;transform-origin:center;transform-box:fill-box}
  .diagram .arrow{fill:#10b981}
  @keyframes flow{to{stroke-dashoffset:-40}}
  @keyframes sunpulse{0%,100%{opacity:.45;transform:scale(1)}50%{opacity:.8;transform:scale(1.08)}}
  @keyframes sunrays{to{transform:rotate(360deg)}}
  @media (prefers-reduced-motion: reduce){
    .diagram .flow,.diagram .sun-glow,.diagram .sun-rays{animation:none}
  }
  @media print{
    body{background:#fff;color:#000}
    header,form,.btnrow,.noprint{display:none!important}
    .card{break-inside:avoid;border-color:#e2e2e2;background:#fff;box-shadow:none}
    .card h2{color:#000}
    /* the answers card is taller than a page — let it flow across pages,
       but keep each row and its sub-heading from splitting awkwardly */
    .card.answers{break-inside:auto}
    .card.answers .anssub{break-after:avoid;break-inside:avoid}
    table.ans,table.ans tbody{break-inside:auto}
    table.ans tr{break-inside:avoid}
  }