body{font-family:Inter,system-ui,-apple-system,'Segoe UI',Roboto,Arial;background:#f5f7fa;color:#0b2438;margin:0;padding:24px}
.card{max-width:1100px;margin:0 auto;background:#ffffff;border:1px solid #e6ebf2;border-radius:10px;padding:20px;box-shadow:0 6px 18px rgba(11,36,56,0.06)}
h1{margin:0 0 6px;font-size:22px}
.lead{color:#4b5563;margin:0 0 12px}
.row{display:flex;gap:18px;flex-wrap:wrap}
.col{flex:1;min-width:320px}
.upload{display:flex;flex-direction:column;gap:8px}
.file-label{display:inline-block;padding:10px;border:1px dashed #cbd5e1;border-radius:6px;cursor:pointer;background:#f8fafc;color:#0b3b66}
.file-label input{display:none}
canvas{width:100%;height:auto;border:1px solid #e6eef6;border-radius:6px;background:#fff}
.form h2{margin:8px 0 6px;font-size:16px;color:#102a43}
label{display:block;margin:8px 0;font-size:14px}
input[type=number]{width:100%;padding:8px;border:1px solid #e6eef6;border-radius:6px;background:#fbfdff}
.result{background:#fbfbfd;padding:10px;border:1px solid #eef2f7;border-radius:6px;margin-top:8px}
.result table{width:100%;border-collapse:collapse}
.result td{padding:6px;border-bottom:1px dashed #e6eef6}
.actions{display:flex;gap:8px;margin-top:10px}
button{padding:10px 12px;border-radius:6px;border:1px solid #0b5fff;background:#0b5fff;color:#fff;cursor:pointer}
button[disabled]{opacity:0.5;cursor:not-allowed}
.conclusion{margin-top:12px;padding:10px;background:#f1f7ff;border-left:4px solid #0b5fff;border-radius:4px}
footer{margin-top:12px;color:#6b7280;font-size:13px}