* {
  box-sizing: border-box;
  font-family: 'Roboto', sans-serif;
}

body {
  margin: 0;
  padding: 0;
  height: 100vh;
  background: linear-gradient(135deg, #43cea2, #185a9d);
  display: flex;
  justify-content: center;
  align-items: center;
}

#container {
  background: white;
  padding: 40px 30px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

form h3 {
  margin-bottom: 20px;
  color: #185a9d;
}

form img {
  width: 90px;
  margin-bottom: 20px;
}

form input[type="text"],
form input[type="password"] {
  width: 100%;
  padding: 12px 16px;
  margin: 10px 0;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 16px;
}

form input[type="submit"] {
  background-color: #185a9d;
  color: white;
  padding: 12px 16px;
  border: none;
  width: 100%;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s ease;
  margin-top: 10px;
}

form input[type="submit"]:hover {
  background-color: #1471ba;
}

.alert {
  color: red;
  margin-top: 10px;
  font-size: 14px;
}

@media (max-width: 480px) {
  #container {
    margin: 20px;
    padding: 30px 20px;
  }
}