:root{color:#17212b;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#eef5f2;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}button,input{font:inherit}.app-shell{width:min(1180px,100% - 32px);margin:0 auto;padding:32px 0}.converter-panel,.preview-section{background:#fff;border:1px solid #d9e2df;border-radius:8px;box-shadow:0 18px 40px #1f293714}.converter-panel{padding:28px}.intro{max-width:720px}.eyebrow{color:#0f766e;letter-spacing:.08em;text-transform:uppercase;margin:0 0 8px;font-size:.8rem;font-weight:700}.intro h1,.section-heading h2{color:#17212b;margin:0;font-weight:750;line-height:1.1}.intro h1{font-size:clamp(2rem,5vw,3.5rem)}.summary,.section-heading p{color:#53616d;margin:12px 0 0}.controls{grid-template-columns:minmax(220px,1.2fr) repeat(2,minmax(150px,.6fr)) auto;align-items:end;gap:16px;margin-top:28px;display:grid}label{color:#27333f;text-align:left;gap:8px;font-size:.92rem;font-weight:700;display:grid}input[type=file],input[type=date],button{min-height:44px;font:inherit;border-radius:6px}input[type=file],input[type=date]{box-sizing:border-box;color:#17212b;background:#f8faf9;border:1px solid #cbd5d1;width:100%;padding:10px 12px}input[type=file]::file-selector-button{color:#0f4f49;cursor:pointer;background:#d7f3ed;border:0;border-radius:5px;margin-right:12px;padding:8px 12px;font-weight:750}button{color:#fff;cursor:pointer;white-space:nowrap;background:#0f766e;border:0;padding:0 18px;font-weight:800}button:hover{background:#0b5d56}.error{color:#991b1b;text-align:left;background:#fef2f2;border-left:4px solid #dc2626;border-radius:5px;margin:18px 0 0;padding:12px 14px}.summary-bar{flex-wrap:wrap;gap:10px;margin-top:22px;display:flex}.summary-bar span{color:#30404d;background:#f4f8f6;border:1px solid #d9e2df;border-radius:999px;padding:7px 12px;font-size:.9rem;font-weight:700}.preview-section{margin-top:22px;overflow:hidden}.section-heading{text-align:left;justify-content:space-between;gap:16px;padding:22px 24px;display:flex}.section-heading h2{font-size:1.35rem}.table-wrap{border-top:1px solid #d9e2df;overflow-x:auto}table{border-collapse:collapse;text-align:left;width:100%;min-width:1060px}th,td{vertical-align:top;border-bottom:1px solid #e6ece9;padding:12px 14px}th{color:#334155;letter-spacing:.04em;text-transform:uppercase;background:#f3f7f5;font-size:.78rem}td{color:#25313d;overflow-wrap:anywhere;font-family:ui-monospace,SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:.86rem;line-height:1.45}.status{white-space:nowrap;border-radius:999px;align-items:center;min-height:26px;padding:2px 9px;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:.78rem;font-weight:800;display:inline-flex}.converted{color:#166534;background:#dcfce7}.skipped-outside-date-range,.skipped-unknown-7th-column{color:#92400e;background:#fef3c7}.invalid-format{color:#991b1b;background:#fee2e2}.empty-state{text-align:center;padding:34px 18px}@media (width<=860px){.app-shell{width:min(100% - 20px,1180px);padding:16px 0}.converter-panel{padding:20px}.controls{grid-template-columns:1fr}button{width:100%}.section-heading{padding:18px 20px;display:block}}