*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family: 'Segoe UI', sans-serif;
}

body{
  height:100vh;
  display:flex;
  justify-content:center;
  align-items:center;
  background: linear-gradient(135deg,#0f2027,#203a43,#2c5364);
}

.login-container{
  background:#111;
  padding:35px;
  width:330px;
  border-radius:12px;
  box-shadow:0 0 20px rgba(0,0,0,0.6);
  text-align:center;
  color:#fff;
}

.login-container h2{
  margin-bottom:5px;
}

.login-container p{
  font-size:14px;
  margin-bottom:20px;
  color:#aaa;
}

.login-container input{
  width:100%;
  padding:12px;
  margin:10px 0;
  border:none;
  border-radius:6px;
  outline:none;
}

.login-container button{
  width:100%;
  padding:12px;
  margin-top:15px;
  border:none;
  background:#00c853;
  color:#fff;
  font-size:16px;
  border-radius:6px;
  cursor:pointer;
}

.login-container button:hover{
  background:#00a846;
}

.error{
  margin-top:12px;
  color:#ff5252;
  font-size:14px;
}