:root{color:#1f2937;background:#fff;font-family:system-ui,Segoe UI,Roboto,sans-serif}body{margin:0}.page{justify-content:center;align-items:center;min-height:100svh;display:flex}.iban-form{gap:8px;display:flex}.iban-form input,.iban-form button{font:inherit;border-radius:6px;padding:10px 14px;font-size:16px}.iban-form input{border:1px solid #d1d5db;width:22rem}.iban-form button{color:#fff;cursor:pointer;background:#1f2937;border:1px solid #1f2937}.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.result{margin:12px 0 0;font-weight:600}.result.valid{color:#15803d}.result.invalid{color:#b91c1c}