:root{--teal:#083f4d;--teal2:#0d5a6b;--gold:#f0c14b;--bg:#f4f7f9;--card:#fff;--text:#14262c;--muted:#5b6f77;--ok:#176b3b;--okbg:#e1f3e6;--bad:#8a1f14;--badbg:#f9d6d2;--warn:#6e3b00;--warnbg:#fdeccb;--border:#d8e2e6}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.45;-webkit-text-size-adjust:100%}
header.top{background:var(--teal);color:#fff;padding:14px 16px;display:flex;align-items:center;gap:12px}
header.top svg{width:34px;height:34px;flex:none}
header.top b{display:block;font-size:1.05rem}
header.top small{opacity:.8}
main{max-width:640px;margin:0 auto;padding:16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px;margin-bottom:14px}
h1{font-size:1.2rem;margin:0 0 6px}
p.muted,.muted{color:var(--muted)}
label{display:block;font-weight:600;margin:10px 0 4px}
input[type=text]{width:100%;font-size:1.3rem;padding:12px;border:1px solid var(--border);border-radius:10px;letter-spacing:.18em;text-transform:uppercase}
button,.btn{font:inherit;background:var(--teal);color:#fff;border:0;border-radius:10px;padding:12px 16px;font-weight:600;cursor:pointer;text-decoration:none;display:inline-block}
button.secondary,.btn.secondary{background:#e6eef1;color:var(--teal)}
button:disabled{opacity:.6}
.row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.row>*{flex:1 1 140px;text-align:center}
.banner{border-radius:12px;padding:14px 16px;font-weight:700;font-size:1.1rem;margin-bottom:12px}
.banner small{display:block;font-weight:500;font-size:.85rem;margin-top:2px}
.banner.ok{background:var(--okbg);color:var(--ok)}
.banner.bad{background:var(--badbg);color:var(--bad)}
.banner.warn{background:var(--warnbg);color:var(--warn)}
table.kv{width:100%;border-collapse:collapse}
table.kv th,table.kv td{text-align:left;padding:8px 0;border-top:1px solid var(--border);vertical-align:top}
table.kv tr:first-child th,table.kv tr:first-child td{border-top:0}
table.kv th{width:42%;color:var(--muted);font-weight:600;padding-right:10px}
.noprint-note{font-size:.85rem;color:var(--muted)}
.photo{margin-top:12px}
.photo img{width:100%;border:1px solid var(--border);border-radius:10px;display:block;cursor:zoom-in}
.photo.big img{cursor:zoom-out}
.err{color:var(--bad);margin-top:8px}
.hidden{display:none!important}
.num{font-family:ui-monospace,Menlo,Consolas,monospace;font-weight:700;letter-spacing:.04em;word-break:break-all}

/* ---------- the printable certificate (A4) ---------- */
.sheet-wrap{max-width:820px;margin:0 auto;padding:12px}
.sheet{background:#fff;color:#111;border:1px solid var(--border);padding:34px 40px;min-height:1000px;display:flex;flex-direction:column;font-family:Georgia,"Times New Roman",serif}
.sheet .head{text-align:center;border-bottom:3px double #083f4d;padding-bottom:12px}
.sheet .head h2{margin:0;font-size:1.7rem;color:#083f4d;letter-spacing:.03em}
.sheet .head .sub{font-size:.95rem;color:#333;margin-top:2px}
.sheet h3.title{text-align:center;letter-spacing:.35em;font-size:1.25rem;margin:22px 0 14px;text-decoration:underline;text-underline-offset:6px}
.sheet .meta{display:flex;justify-content:space-between;gap:12px;font-size:.98rem;margin-bottom:16px;flex-wrap:wrap}
.sheet .meta .no{font-family:ui-monospace,Menlo,Consolas,monospace;font-weight:700}
.sheet p.body{font-size:1.08rem;line-height:1.85;text-align:justify;margin:8px 0 14px}
.sheet table.det{width:100%;border-collapse:collapse;margin:8px 0 8px;font-size:1rem}
.sheet table.det td{border:1px solid #9aa9ae;padding:7px 10px;vertical-align:top}
.sheet table.det td:first-child{width:38%;background:#f1f5f6;font-weight:700}
.sheet .sign{margin-top:auto;padding-top:64px;display:flex;justify-content:flex-end}
.sheet .sign div{text-align:center;min-width:230px}
.sheet .sign .line{border-top:1px solid #111;margin-bottom:4px}
.sheet .sign b{font-size:1.1rem;text-transform:uppercase;letter-spacing:.03em}
.sheet .foot{margin-top:26px;border-top:2px solid #083f4d;padding-top:8px;text-align:center;font-size:.88rem;color:#333}
.sheet .foot .note{font-size:.78rem;color:#555;margin-top:5px}
.sheet .foot .ver{font-size:.82rem;margin-top:6px}
.bar{max-width:820px;margin:0 auto;padding:12px 12px 0}
@page{size:A4;margin:10mm}
@media print{
  body{background:#fff}
  header.top,.bar,.noprint{display:none!important}
  .sheet-wrap{padding:0;max-width:none}
  .sheet{border:0;padding:0;min-height:277mm}
}
@media (max-width:560px){.sheet{padding:20px 16px}.sheet .head h2{font-size:1.3rem}}