:root{color-scheme:light}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:flex;align-items:center;justify-content:center;background:#f4f5f7;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Yu Gothic,sans-serif;color:#1a1a1a}.login-card{width:100%;max-width:360px;padding:2.5rem 2rem;background:#fff;border-radius:12px;box-shadow:0 4px 24px rgba(0,0,0,.08)}.login-card h1{font-size:1.25rem;margin:0 0 1.5rem;text-align:center}.field{margin-bottom:1rem}.field label{display:block;font-size:.85rem;margin-bottom:.35rem;color:#444}.field input{width:100%;padding:.6rem .75rem;border:1px solid #d0d3d8;border-radius:6px;font-size:1rem}.field input:focus{outline:none;border-color:#4a63e7;box-shadow:0 0 0 3px rgba(74,99,231,.15)}.submit{width:100%;padding:.7rem;margin-top:.5rem;border:none;border-radius:6px;background:#1a2744;color:#fff;font-size:1rem;cursor:pointer}.submit:hover{background:#26365c}.error{background:#fdecea;color:#a4262c;border:1px solid #f4c7c3;border-radius:6px;padding:.6rem .75rem;font-size:.85rem;margin-bottom:1rem}