* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial;
  background: #0f172a;
}

#login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh; /* FIXED */
  padding: 10px; /* prevents edge cut on small screens */
}

.login-box {
  background: #1e293b;
  padding: 25px;
  border-radius: 12px;
  width: 320px;
  max-width: 100%; /* responsive fix */
  color: white;
  box-shadow: 0 0 15px rgba(0,0,0,0.4);
}

.login-box h2 {
  text-align: center;
}

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

.login-box button {
  width: 100%;
  padding: 12px;
  background: #22c55e;
  border: none;
  color: white;
  font-weight: bold;
  border-radius: 6px;
  cursor: pointer;
}

#error {
  color: #f87171;
  text-align: center;
  margin-top: 10px;
}