body{display:flex;justify-content:center;align-items:center;height:100vh}.login-card{width:min(420px,92%);background:#fff;padding:32px;border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,.15)}h1{text-align:center;color:#0D5BD7}.sub{text-align:center;color:#666}label{display:block;margin-top:12px}input{width:100%;padding:12px;border:1px solid #ccc;border-radius:8px;margin-top:4px}button{margin-top:20px;width:100%;padding:12px;background:#0D5BD7;color:#fff;font-weight:bold}footer{text-align:center;margin-top:20px;color:#888}