body,html{margin:0;padding:0;background:#fff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:#111827}.app{max-width:1100px;margin:0 auto;padding:60px 40px}.header{margin-bottom:40px}.header h1{font-size:32px;font-weight:600;margin:0}.header p{margin-top:8px;color:#6b7280;font-size:15px}.panel{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:24px}.panel,.stats-row{margin-bottom:30px}.stats-row{display:flex;gap:20px}.stat-card{flex:1 1;border:1px solid #e5e7eb;border-radius:8px;padding:20px;background:#fff}.stat-label{font-size:13px;color:#6b7280}.stat-value{font-size:22px;font-weight:600;margin-top:6px}.input-row{display:flex;gap:20px;align-items:center;margin-top:20px}input[type=file],input[type=number]{padding:8px 10px;border:1px solid #d1d5db;border-radius:6px;font-size:14px}.chart-container{height:450px}