:root{
  --bg:#f7f7fb;
  --ink:#1a1d29;
  --muted:#6b7280;
  --brand:#2563eb;
  --brand-dark:#1e40af;
  --ok:#16a34a;
  --warn:#d97706;
  --err:#dc2626;
  --card:#ffffff;
  --border:#e5e7eb;
  --hover:#f3f4f6;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;line-height:1.5}
body{max-width:1100px;margin:0 auto;padding:0 1.5rem 4rem}

header{padding:2.5rem 0 2rem;border-bottom:1px solid var(--border);margin-bottom:2rem}
header h1{margin:0;font-size:1.875rem;font-weight:700}
.subtitle{margin:.25rem 0 0;color:var(--muted);font-size:.95rem}

main{display:flex;flex-direction:column;gap:1.5rem}

.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:1.75rem;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.card h2{margin:0 0 1rem;font-size:1.1rem;font-weight:600}
.card h2:not(:first-child){margin-top:1.75rem}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.85rem}
label{display:flex;flex-direction:column;gap:.3rem;font-size:.85rem;color:var(--muted);font-weight:500}
label.full{display:block;margin-top:1rem}

input[type=text],input[type=number],select,textarea{
  padding:.6rem .75rem;border:1px solid var(--border);border-radius:8px;font-size:.95rem;color:var(--ink);background:#fff;font-family:inherit;
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
textarea{resize:vertical;min-height:60px}

.dropzone{
  border:2px dashed #cbd5e1;border-radius:12px;padding:2rem 1rem;text-align:center;cursor:pointer;
  transition:all .15s;background:#fafbfc;margin-top:.5rem;
}
.dropzone:hover{border-color:var(--brand);background:#eff6ff}
.dropzone.dragover{border-color:var(--brand);background:#dbeafe;transform:scale(1.01)}
.dropzone p{margin:.25rem 0}
.dropzone .hint{font-size:.85rem;color:var(--muted)}

.file-info{margin-top:.75rem;padding:.75rem 1rem;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:8px;font-size:.9rem;color:#166534}
.file-info.error{background:#fef2f2;border-color:#fecaca;color:#991b1b}

button{cursor:pointer;font-family:inherit;font-size:.95rem;padding:.7rem 1.4rem;border:none;border-radius:8px;font-weight:600;transition:all .15s}
button:disabled{opacity:.5;cursor:not-allowed}
button.primary{background:var(--brand);color:#fff;margin-top:1.25rem}
button.primary:not(:disabled):hover{background:var(--brand-dark)}
button.secondary{background:#fff;color:var(--ink);border:1px solid var(--border);margin-top:1rem}
button.secondary:hover{background:var(--hover)}

.progress-bar{width:100%;height:8px;background:#e5e7eb;border-radius:99px;overflow:hidden;margin:.5rem 0 1rem}
#progress_fill{height:100%;width:0;background:linear-gradient(90deg,var(--brand),#60a5fa);transition:width .35s ease}
#progress_text{color:var(--muted);font-size:.9rem;margin:0 0 .75rem}
.log{max-height:180px;overflow:auto;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.78rem;color:#475569;background:#f8fafc;border:1px solid var(--border);border-radius:8px;padding:.6rem .8rem;line-height:1.4}
.log .ok{color:var(--ok)}
.log .err{color:var(--err)}
.log .warn{color:var(--warn)}

.result-tabs{display:flex;gap:.25rem;border-bottom:1px solid var(--border);margin-bottom:1.25rem}
.tab-btn{background:transparent;border-radius:0;padding:.65rem 1rem;color:var(--muted);font-weight:500;border-bottom:2px solid transparent;border-radius:8px 8px 0 0}
.tab-btn:hover{background:var(--hover);color:var(--ink)}
.tab-btn.active{color:var(--brand);border-bottom-color:var(--brand);background:transparent}

.tab-content{display:none;position:relative}
.tab-content.active{display:block}

.copy-btn{position:absolute;top:.5rem;right:.5rem;padding:.35rem .75rem;font-size:.8rem;background:var(--hover);color:var(--ink);font-weight:500;border:1px solid var(--border);z-index:2}
.copy-btn:hover{background:#e5e7eb}
.copy-btn.copied{background:var(--ok);color:#fff;border-color:var(--ok)}

.feedback-block{
  background:#fafbfc;border:1px solid var(--border);border-radius:10px;padding:1.5rem 1.75rem;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92rem;
  white-space:pre-wrap;word-wrap:break-word;line-height:1.6;margin:0;
  max-height:600px;overflow:auto;
}
.feedback-block.script{font-family:Georgia,"Times New Roman",serif;font-size:1.02rem;line-height:1.75;white-space:normal}
.feedback-block.tiny{font-size:.78rem;line-height:1.45;color:#475569}

footer{margin-top:3rem;padding-top:1.5rem;border-top:1px solid var(--border);text-align:center;color:var(--muted);font-size:.8rem}

.hidden{display:none !important}