:root{color-scheme:light}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;background:#faf2e6;color:#2b2420;font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif;padding:16px}
.os-card{width:min(420px,100%);background:#fff;border:1px solid #e6d8c6;border-radius:14px;padding:28px 24px;box-shadow:0 8px 30px #6b4e2a14}
h1{font-size:1.35rem;margin:0}.os-sub{margin:2px 0 20px;color:#7a6a5c}label{display:block;font-weight:600;font-size:.9rem;margin:14px 0 6px}
input[type=email],input[type=password],input[type=text]{width:100%;font:inherit;padding:11px 12px;border:1px solid #cdb9a3;border-radius:9px;background:#fff}
input:focus,button:focus{outline:2px solid #a88052;outline-offset:2px}.os-check{display:flex;gap:10px;align-items:center;font-weight:500;margin-top:16px}.os-check input{width:20px;height:20px}
button{font:inherit;cursor:pointer;border-radius:9px;padding:11px 16px;border:1px solid #8a6a45;background:#8a6a45;color:#fff;margin-top:18px;width:100%}button.os-plain{background:#fff;color:#5a4632;border-color:#cdb9a3}
.os-error{color:#8b2d1f;margin:12px 0 0}.os-note{color:#6d5d4f;font-size:.9rem}ul.os-devices{list-style:none;padding:0}ul.os-devices li{display:flex;justify-content:space-between;gap:8px;align-items:center;border-top:1px solid #eee2d4;padding:10px 0}ul.os-devices button{width:auto;margin:0;padding:6px 10px}