:root{
  --bg:#f8f9fa;
  --surface:#fff;
  --surface-alt:#f8f9ff;
  --primary:#007bff;
  --primary-dark:#0056b3;
  --muted:#666;
  --border:#e1e8ef;
  --card-radius:12px;
  --shadow:0 6px 18px rgba(0,0,0,0.06);
  --success:#16a34a;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family:Arial, sans-serif;
  background:var(--bg);
  color:#222;
  line-height:1.5;
}
.header{background:var(--primary);color:#fff;padding:1.2rem 1rem}
.header-inner{max-width:1200px;margin:0 auto;text-align:center}
.header h1{margin:0;font-size:1.6rem}
.header .intro{opacity:0.95;margin-top:0.25rem}

.container{max-width:1200px;margin:1rem auto;padding:0 1rem}
.card{background:var(--surface);border-radius:var(--card-radius);box-shadow:var(--shadow);padding:1rem;border:1px solid var(--border);margin-bottom:1rem}
.section-title{text-align:center;color:var(--primary);font-size:1.25rem;margin:0 0 0.6rem;position:relative}
.section-title::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:-8px;width:70px;height:3px;background:var(--primary);border-radius:2px}

.controls{display:flex;gap:0.6rem;align-items:center;margin-bottom:0.8rem;flex-wrap:wrap}
.spacer{flex:1}

.btn-primary,.btn-secondary,.btn-outline{
  border-radius:8px;padding:0.55rem 0.9rem;border:none;font-size:0.95rem;cursor:pointer;display:inline-flex;align-items:center;gap:0.4rem
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:#6c757d;color:#fff}
.btn-outline{background:transparent;border:1px solid var(--border);color:#222}
.btn-outline:disabled{opacity:0.6;cursor:not-allowed}

.file-btn{position:relative;overflow:hidden;cursor:pointer}
.file-btn input[type=file]{position:absolute;left:0;top:0;opacity:0;width:100%;height:100%;cursor:pointer}

.table-wrapper{overflow:auto;border-radius:8px;border:1px solid var(--border);background:var(--surface-alt);padding:0.5rem}
.items-table{width:100%;border-collapse:collapse;font-size:0.95rem}
.items-table th, .items-table td{padding:0.5rem 0.6rem;text-align:left;border-bottom:1px solid rgba(0,0,0,0.04)}
.items-table thead th{font-weight:700;color:var(--primary)}
.input-inline{width:100%;padding:0.4rem;border-radius:6px;border:1px solid var(--border)}
.select-inline{padding:0.4rem;border-radius:6px;border:1px solid var(--border);background:#fff}

.actions-btn{display:flex;gap:0.4rem}
.note-box{margin-top:0.75rem;padding:0.6rem 0.8rem;border-radius:8px;border:1px solid var(--border);background:#e9f5ff;color:#0056b3;font-size:0.95rem}

.results{margin-top:1rem;padding:0.9rem}
.card-light{background:#f9fbff;border-radius:8px;border:1px solid var(--border)}

.summary p{margin:0}
.best-row{background:linear-gradient(90deg,rgba(0,123,255,0.06),rgba(0,123,255,0.02));border-left:3px solid var(--primary)}

.help-text{font-size:0.9rem;color:var(--muted);margin-top:0.5rem}

.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:0.8rem;margin-top:0.6rem}
.step{background:var(--surface-alt);padding:0.8rem;border-radius:8px;border:1px solid var(--border)}
.step-number{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;margin-bottom:0.5rem}

.benefits-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:0.8rem}
.benefit{background:var(--surface-alt);padding:0.8rem;border-radius:8px;border:1px solid var(--border)}

.faq-item{margin-bottom:0.6rem}
.faq-question{width:100%;text-align:left;padding:0.7rem;border-radius:8px;border:1px solid var(--border);background:var(--surface-alt);font-weight:600;cursor:pointer;color:#0056b3;}
.faq-answer{display:none;padding:0.6rem;border-left:3px solid var(--primary);background:var(--surface);border-radius:0 0 8px 8px;margin-top:0.2rem}
.faq-item.active .faq-answer{display:block}

.footer{padding:1rem;text-align:center;color:var(--muted);font-size:0.9rem}

/* Modal styles */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.55); display: none; align-items: center; justify-content: center; z-index: 9999; }
.modal-overlay.active { display:flex; }
.modal { background: #fff; padding: 1.2rem; border-radius:10px; width:94%; max-width:720px; box-shadow: var(--shadow); }
.mapping-row{display:grid;grid-template-columns: 1fr 180px; gap:0.6rem; margin-bottom:0.5rem}
.mapping-row label{font-size:0.9rem}
.preview-table{width:100%;border-collapse:collapse;margin-top:0.5rem}
.preview-table td, .preview-table th{border-bottom:1px solid #eee;padding:0.4rem;font-size:0.9rem}
.modal-actions{display:flex;justify-content:flex-end;gap:0.6rem;margin-top:0.8rem}

/* OCR preview */
#ocrPreviewArea{max-height:260px;overflow:auto;border:1px dashed #e6eef9;padding:0.5rem;border-radius:8px;background:#fafcff}
.ocr-row{display:flex;gap:0.6rem;align-items:center;padding:0.3rem 0.2rem;border-bottom:1px solid #eef6ff}
.ocr-row input[type=checkbox]{transform:scale(1.1)}

/* responsive */
@media (max-width:800px){
  .controls{flex-direction:column;align-items:stretch}
  .spacer{display:none}
  .mapping-row{grid-template-columns: 1fr 120px}
}