:root{
  --bg:#f6f9f8; --card:#ffffff; --ink:#0f172a; --muted:#5b6b7f;
  --brand:#0d7a6a; --brand-d:#0a5f53; --accent:#14b8a6;
  --line:#e2e8f0; --ok:#047857; --err:#b91c1c;
  --radius:14px; --max:1120px;
}
*{box-sizing:border-box}
html,body{overflow-x:hidden}
html{scroll-padding-top:84px}
html{-webkit-text-size-adjust:100%}
img{max-width:100%;height:auto}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
body{margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6;font-size:16px}
h1,h2,h3{line-height:1.25;letter-spacing:-.01em}
h2{margin:32px 0 8px;font-size:22px}
h3{margin:20px 0 8px;font-size:17px}
p,li{max-width:72ch}
a{color:var(--brand)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
/* Header */
header.top{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);z-index:20}
header.top .wrap{display:flex;align-items:center;gap:12px;padding:12px 20px;flex-wrap:wrap}
.logo{font-weight:800;text-decoration:none;color:var(--ink);font-size:18px;white-space:nowrap}
.logo b{color:var(--brand)}
nav.main{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
nav.main a{text-decoration:none;color:var(--ink);font-size:14px;padding:8px 10px;border-radius:8px;min-height:36px;display:inline-flex;align-items:center}
nav.main a:hover{background:#eef4f2}
.badge{display:inline-block;background:#e6f6f1;color:var(--brand-d);border:1px solid #bfe9de;font-size:12px;padding:4px 10px;border-radius:999px;white-space:nowrap}
/* Hero */
.hero{padding:28px 0 8px}
.hero h1{font-size:clamp(26px,4vw,40px);margin:10px 0;line-height:1.15;max-width:22ch}
.hero p{color:var(--muted);max-width:68ch}
/* Tool card */
.tool{display:flex;flex-direction:column;gap:14px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:16px 0;box-shadow:0 6px 24px rgba(15,23,42,.05)}
.tool>h3,.tool>p.note{margin:0}
.drop{border:2px dashed #9ccfc5;border-radius:12px;padding:28px 20px;text-align:center;background:#fbfefe;cursor:pointer;transition:background .15s,border-color .15s}
.drop:hover{background:#f5fdfb;border-color:var(--brand)}
.drop.over{background:#eefaf6;border-color:var(--brand)}
.drop input{display:none}
.drop strong{display:block;font-size:17px;margin-bottom:4px}
.big-upload{display:block;width:100%;min-height:60px;font-size:18px;border-radius:14px;margin:0}
.hint{font-size:14px;color:var(--muted);text-align:center;margin:0}
.controls{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;margin:0;align-items:end}
label.f{display:grid;gap:6px;font-size:13px;color:var(--muted);min-width:0}
input[type=number],select{padding:12px;border:1px solid var(--line);border-radius:10px;font-size:16px;background:#fff;color:var(--ink);width:100%;min-width:0}
.presets{display:flex;gap:8px;flex-wrap:wrap;margin:0;align-items:center}
button{cursor:pointer;font-family:inherit}
.btn{background:var(--brand);color:#fff;border:0;border-radius:10px;padding:13px 18px;font-weight:700;font-size:16px}
.btn:hover{background:var(--brand-d)}
.btn.ghost{background:#eef4f2;color:var(--brand-d)}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.pill{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 14px;font-size:14px;min-height:40px}
.pill.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.progress{display:none;margin:0;background:#eef4f2;border-radius:999px;overflow:hidden}
.progress > div{height:10px;width:0;background:var(--accent);transition:width .2s}
.spec-line{background:#eef4f2;border-radius:10px;padding:10px 12px;font-size:14px;margin:0;line-height:1.5}
/* Result */
.result{display:none;margin:4px 0 0;border-top:1px solid var(--line);padding-top:16px}
.result img{display:block;margin:0 auto;max-height:420px;object-fit:contain;border:1px solid var(--line);border-radius:10px;background:#f8fafc}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:12px 0}
.stat{background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:10px;min-width:0}
.stat b{display:block;font-size:17px;margin-top:2px;word-break:break-word}
.verifybox{background:#f0fdf4;border:2px solid #86efac;border-radius:12px;padding:12px 14px;margin:12px 0;font-size:15px;line-height:1.5}
.verifybox.fail{background:#fef2f2;border-color:#fca5a5}
.verifybox b{font-size:19px;display:block;margin-bottom:2px}
/* Batch */
.batch{display:grid;gap:10px;margin:0}
.brow{display:grid;grid-template-columns:56px 1fr auto;gap:12px;align-items:center;border:1px solid var(--line);border-radius:10px;padding:10px;background:#fff;font-size:14px}
.brow img{width:56px;height:56px;object-fit:cover;border-radius:8px;border:1px solid var(--line)}
.brow span{min-width:0;overflow:hidden;text-overflow:ellipsis}
.brow span:first-of-type{font-weight:600}
/* Content blocks */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:12px 0}
.step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px}
.step b{display:block;font-size:15px;margin-bottom:4px}
.step p{font-size:14px;margin:0;color:var(--muted)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:12px;margin:12px 0;background:#fff}
table.spec{width:100%;min-width:620px;border-collapse:collapse;font-size:14px;margin:0}
table.spec th,table.spec td{border-bottom:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
table.spec tr:last-child th,table.spec tr:last-child td{border-bottom:0}
table.spec th{background:#f8fafc;font-size:13px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);white-space:nowrap}
details{border:1px solid var(--line);border-radius:10px;padding:0;margin:8px 0;background:#fff;overflow:hidden}
details summary{padding:14px;cursor:pointer;font-weight:600;min-height:48px;font-size:15px}
details > *:not(summary){padding:0 14px 14px}
/* Footer */
footer{background:#0b1513;color:#cbd5e1;font-size:14px}
.foot-grid{max-width:var(--max);margin:0 auto;padding:36px 20px 8px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.foot-grid h4{color:#fff;font-size:13px;margin:0 0 10px;text-transform:uppercase;letter-spacing:.06em}
.foot-grid a{display:flex;align-items:center;color:#cbd5e1;text-decoration:none;min-height:36px}
.foot-grid a:hover{color:#fff;text-decoration:underline}
.foot-brand{font-size:20px;font-weight:800;color:#fff}
.foot-brand b{color:var(--accent)}
.foot-note{font-size:13px;color:#94a3b8;max-width:36ch}
.foot-bottom{border-top:1px solid #1f2e2a;margin-top:16px}
.foot-bottom .wrap{display:flex;gap:8px 16px;flex-wrap:wrap;align-items:center;padding:16px 20px;font-size:13px;color:#94a3b8}
.foot-bottom a{color:#cbd5e1}
.note{font-size:13px;color:var(--muted)}
.ok{color:var(--ok);font-weight:700}
.stickybar{display:none}
/* Tablet */
@media(max-width:900px){
  .foot-grid{grid-template-columns:1fr 1fr}
  .controls{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:1fr 1fr}
}
/* Mobile */
@media(max-width:640px){
  .wrap{padding:0 16px}
  header.top .wrap{padding:10px 16px;gap:8px}
  nav.main{display:flex;flex-wrap:nowrap;overflow-x:auto;gap:6px;width:100%;margin:2px 0 0;scrollbar-width:none}
  nav.main::-webkit-scrollbar{display:none}
  nav.main a{background:#f1f5f4;white-space:nowrap;font-size:13px;padding:8px 12px}
  header.top .badge{display:none}
  .hero{padding:20px 0 4px}
  .tool{padding:16px;margin:12px 0}
  .controls{grid-template-columns:1fr}
  .btn,.pill{min-height:48px}
  .big-upload{min-height:60px}
  .grid2{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  .brow{grid-template-columns:48px 1fr}
  .brow img{width:48px;height:48px}
  .brow .pill{grid-column:1/-1;min-height:48px}
  .stickybar{display:flex;position:sticky;bottom:0;gap:10px;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid var(--line);z-index:30;box-shadow:0 -4px 16px rgba(15,23,42,.08)}
  .stickybar .btn{flex:1;min-height:56px;font-size:17px;border-radius:14px;margin:0}
  footer{padding-bottom:96px}
  .foot-grid{grid-template-columns:1fr 1fr;padding:28px 16px 4px;gap:20px}
  h2{font-size:20px}
}
@media(max-width:400px){
  .foot-grid{grid-template-columns:1fr}
  .badge{font-size:11px}
  .logo{font-size:16px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}