:root{
  --bg:#f8fafc;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#475569;
  --border:#e2e8f0;
  --brand:#2563eb;
  --brand2:#1d4ed8;
  --okbg:#eff6ff;
  --oktext:#1d4ed8;
  --warnbg:#fff7ed;
  --warntext:#9a3412;
  --goodbg:#ecfdf5;
  --goodtext:#065f46;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background:var(--bg);
  color:var(--text);
  line-height:1.5;
}

a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:1100px;margin:0 auto;padding:0 16px}
.header{
  background:var(--card);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 0;
  gap:16px;
}
.brand{
  font-weight:900;
  color:var(--brand);
  font-size:22px;
}
.nav{
  display:flex;gap:16px;flex-wrap:wrap;
  font-size:14px;color:var(--muted);font-weight:600;
}
.nav a{color:var(--muted)}
.nav a:hover{color:var(--brand)}

.main{padding:28px 0 40px}

.grid{display:grid;gap:18px}
@media (min-width: 980px){ .grid{grid-template-columns: 3fr 1fr;} }

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:18px;
  box-shadow:0 1px 0 rgba(15,23,42,0.04);
  overflow:hidden;
}
.card-body{padding:22px}
.notice{
  background:var(--okbg);
  color:var(--oktext);
  border-bottom:1px solid #dbeafe;
  padding:10px 16px;
  font-size:14px;
}

h1{margin:0;font-size:28px;letter-spacing:-0.02em}
h2{margin:22px 0 10px;font-size:20px;letter-spacing:-0.01em}
h3{margin:18px 0 8px;font-size:16px}
p{margin:10px 0;color:var(--text)}
.muted{color:var(--muted)}
.small{font-size:13px}

.pills{display:grid;gap:12px}
@media (min-width: 760px){ .pills{grid-template-columns:1fr 1fr;} }

.pill{
  border:1px solid var(--border);
  border-radius:14px;
  padding:12px 14px;
  background:#fff;
}
.pill.good{background:var(--goodbg);border-color:#bbf7d0;color:var(--goodtext)}
.pill.warn{background:var(--warnbg);border-color:#fed7aa;color:var(--warntext)}
.pill h3{margin:0;font-size:14px}
.pill ul{margin:8px 0 0;padding-left:18px}
.pill li{margin:4px 0;font-size:13px}

.dropzone{
  border:2px dashed #93c5fd;
  background:#f8fbff;
  border-radius:16px;
  padding:18px;
  text-align:center;
  cursor:pointer;
}
.dropzone:hover{border-color:#60a5fa}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 14px;border-radius:12px;
  font-weight:800;font-size:14px;
  border:1px solid transparent;
  cursor:pointer;
}
.btn.primary{background:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand2)}
.btn.green{background:#16a34a;color:#fff}
.btn.green:hover{background:#15803d}
.btn.full{width:100%;padding:14px 16px;font-size:16px;border-radius:16px}

.file-row{
  display:flex;align-items:center;justify-content:space-between;
  gap:10px;
  border:1px solid var(--border);
  border-radius:12px;
  padding:10px 12px;
  background:#fff;
  font-size:14px;
}
.file-row .name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:70%}
.file-row .actions{display:flex;gap:8px;align-items:center}

.icon-btn{
  border:1px solid var(--border);
  background:#fff;
  border-radius:10px;
  padding:6px 8px;
  cursor:pointer;
  font-weight:800;
}
.icon-btn:hover{border-color:#cbd5e1}
.icon-btn.danger{color:#b91c1c}

.progress{margin-top:18px;display:none}
.progress.show{display:block}
.progress-top{display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}
.progress-bar{
  margin-top:6px;
  height:8px;border-radius:999px;
  background:#e2e8f0;
  overflow:hidden;
}
.progress-bar > div{
  height:100%;
  width:0%;
  background:var(--brand);
  transition:width .2s ease;
}

.result{
  margin-top:18px;
  display:none;
  border:1px solid #bbf7d0;
  background:var(--goodbg);
  color:var(--goodtext);
  border-radius:14px;
  padding:12px 14px;
}
.result.show{display:block}
.result .btn{margin-top:10px}

.ad-slot{
  border:1px dashed #cbd5e1;
  background:#f1f5f9;
  border-radius:14px;
  color:#334155;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;
  min-height:110px;
  margin-top:16px;
}
.ad-slot.tall{min-height:600px}

.footer{
  padding:30px 0 40px;
  color:var(--muted);
  font-size:13px;
}
.footer a{color:var(--muted);font-weight:700}
.footer a:hover{color:var(--brand)}
hr.sep{border:none;border-top:1px solid var(--border);margin:22px 0}

.code{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
  background:#0b1220;
  color:#e2e8f0;
  padding:2px 6px;
  border-radius:8px;
  font-size:12px;
}