@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:wght@400;600;700&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --paper:#FAF9F4;
  --paper-alt:#F1EFE6;
  --ink:#1C2321;
  --ink-soft:#5B6360;
  --line:#DFDCCF;
  --teal:#0F6E5F;
  --teal-soft:#E4EFEC;
  --amber:#B5762E;
  --amber-soft:#F6ECDD;
  --red:#A8402F;
  --red-soft:#F5E7E3;
}

*{box-sizing:border-box}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Inter',sans-serif;
  line-height:1.5;
}

.wrap{max-width:960px;margin:0 auto;padding:40px 24px 80px}

.masthead{
  border-bottom:2px solid var(--ink);
  padding-bottom:20px;
  margin-bottom:32px;
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
}
.masthead h1{
  font-family:'Source Serif 4',serif;
  font-weight:700;
  font-size:2rem;
  margin:0;
  letter-spacing:-0.01em;
}
.masthead .tag{
  font-family:'IBM Plex Mono',monospace;
  font-size:0.72rem;
  color:var(--ink-soft);
  text-transform:uppercase;
  letter-spacing:0.08em;
}
.masthead .kop{
  font-family:'IBM Plex Mono',monospace;
  font-size:0.75rem;
  color:var(--ink-soft);
  text-align:right;
}

.panel{
  background:#fff;
  border:1px solid var(--line);
  border-radius:4px;
  padding:24px;
  margin-bottom:24px;
}
.panel h2{
  font-family:'Source Serif 4',serif;
  font-size:1.15rem;
  margin:0 0 4px;
}
.panel .desc{color:var(--ink-soft);font-size:0.88rem;margin-bottom:16px}

.upload-box{
  border:2px dashed var(--line);
  border-radius:6px;
  padding:32px;
  text-align:center;
  background:var(--paper-alt);
}
.upload-box input[type=file]{margin-top:12px}

.btn{
  font-family:'Inter',sans-serif;
  font-weight:600;
  font-size:0.88rem;
  background:var(--ink);
  color:#fff;
  border:none;
  border-radius:4px;
  padding:10px 20px;
  cursor:pointer;
}
.btn:hover{background:#000}
.btn.secondary{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.secondary:hover{background:var(--paper-alt)}

.grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:700px){.grid{grid-template-columns:1fr}}

.tab-btn{
  font-family:'Inter',sans-serif;
  font-weight:600;
  font-size:0.85rem;
  background:transparent;
  color:var(--ink-soft);
  border:1px solid var(--line);
  border-radius:4px 4px 0 0;
  padding:9px 16px;
  cursor:pointer;
}
.tab-btn:hover{background:var(--paper-alt)}
.tab-btn.active{background:var(--ink);color:#fff;border-color:var(--ink)}

.testcard{
  border:1px solid var(--line);
  border-radius:6px;
  padding:18px;
  background:var(--paper-alt);
}
.testcard h3{
  font-family:'Source Serif 4',serif;
  font-size:1rem;
  margin:0 0 6px;
}
.testcard p{font-size:0.82rem;color:var(--ink-soft);margin:0 0 12px}

label{
  display:block;
  font-size:0.78rem;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:0.03em;
  color:var(--ink-soft);
  margin:12px 0 4px;
}
select,input[type=text]{
  width:100%;
  padding:8px 10px;
  border:1px solid var(--line);
  border-radius:4px;
  font-family:'Inter',sans-serif;
  font-size:0.9rem;
  background:#fff;
}
select[multiple]{height:140px}
.hint{font-size:0.75rem;color:var(--ink-soft);margin-top:2px}

table.tbl{
  width:100%;
  border-collapse:collapse;
  font-size:0.85rem;
  margin-top:8px;
}
table.tbl th{
  font-family:'IBM Plex Mono',monospace;
  font-size:0.72rem;
  text-transform:uppercase;
  letter-spacing:0.04em;
  text-align:left;
  color:var(--ink-soft);
  border-bottom:2px solid var(--ink);
  padding:8px 10px;
}
table.tbl td{
  border-bottom:1px solid var(--line);
  padding:8px 10px;
  font-family:'IBM Plex Mono',monospace;
}
table.tbl tr:hover td{background:var(--paper-alt)}

.stamp{
  display:inline-block;
  font-family:'IBM Plex Mono',monospace;
  font-weight:600;
  font-size:0.72rem;
  letter-spacing:0.05em;
  padding:3px 10px;
  border-radius:3px;
  border:1px solid currentColor;
}
.stamp.ok{color:var(--teal);background:var(--teal-soft)}
.stamp.warn{color:var(--amber);background:var(--amber-soft)}
.stamp.bad{color:var(--red);background:var(--red-soft)}

.summary-box{
  border-left:4px solid var(--teal);
  background:var(--teal-soft);
  padding:14px 18px;
  margin:20px 0;
  font-size:0.92rem;
}
.summary-box.warn{border-color:var(--amber);background:var(--amber-soft)}

.preview-scroll{overflow-x:auto;max-height:320px;overflow-y:auto;border:1px solid var(--line);border-radius:4px}

a.back{
  display:inline-block;
  margin-top:24px;
  font-size:0.85rem;
  color:var(--ink-soft);
  text-decoration:none;
}
a.back:hover{color:var(--ink);text-decoration:underline}

.eq{
  font-family:'IBM Plex Mono',monospace;
  background:var(--paper-alt);
  padding:12px 16px;
  border-radius:4px;
  font-size:0.88rem;
  overflow-x:auto;
  white-space:nowrap;
}

footer.note{
  margin-top:40px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:0.75rem;
  color:var(--ink-soft);
  font-family:'IBM Plex Mono',monospace;
}