:root{--paper:#f6f6f5;--surface:#fff;--ink:#1c1c1c;--muted:#555;--navy:#2d3338;--rust:#f29100;--red:#a4291b}
*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;padding:24px;background:var(--paper);color:var(--ink);font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif}
.auth-card{width:min(420px,100%);background:var(--surface);border-top:4px solid var(--rust);border-radius:14px;padding:32px;box-shadow:0 10px 34px rgba(0,0,0,.12)}
.brand{text-transform:uppercase;letter-spacing:.12em;font-weight:700;font-size:13px;color:var(--navy)}h1{margin:8px 0 4px;font-size:28px}.intro{margin:0 0 22px;color:var(--muted)}label{display:block;font-weight:650;margin:13px 0}input{display:block;width:100%;margin-top:5px;padding:11px 12px;border:1px solid #aaa;border-radius:8px;font:inherit}input:focus{outline:3px solid #b8cef9;outline-offset:1px;border-color:#0b5fff}button{width:100%;margin-top:10px;padding:12px;border:0;border-radius:8px;background:var(--navy);color:#fff;font:700 16px system-ui;cursor:pointer}.error{padding:10px 12px;border-left:4px solid var(--red);background:#fbeae8;color:var(--red);border-radius:6px}