:root{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;color:#1a1a1a;background-color:#f4f5f8}*{box-sizing:border-box}body{margin:0}.page{min-height:100vh;display:grid;place-items:center;padding:1.5rem}.panel{width:min(560px,100%);background:#fff;border:1px solid #dadde3;border-radius:12px;padding:1.5rem;box-shadow:0 10px 30px #00000014}h1{margin:0;font-size:1.6rem}.subtitle{margin:.5rem 0 1.2rem;color:#4f5b6d}.fileInput{display:inline-flex;flex-direction:column;gap:.45rem;margin-bottom:.75rem}.filename{margin:0 0 1rem;color:#45546c}button{border:0;border-radius:8px;background:#2b6cb0;color:#fff;padding:.65rem 1rem;font-size:.95rem;cursor:pointer}button[disabled]{opacity:.5;cursor:not-allowed}.status{margin-top:1rem;font-size:.95rem}.status.success{color:#1f7a3f}.status.error{color:#b42318}