html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: Arial, sans-serif;
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), 
  url("../img/isu_front_bg.jpg");

  background-size: cover;
  background-position: center;
  width: 100%;
  height: 100vh;
  flex-wrap: wrap;
}
.login-btn {
  background-color: #007bff;
  font-size: 20px;
  padding: 18px 40px;
  min-width: 200px;
}
.login-btn:hover {
  background-color: #0056b3;
  box-shadow: 0 6px 20px rgba(0, 123, 255, 0.3);
}

.login-card {
  width: 500px;
  background-color: rgba(255, 255, 255, 0.5);
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  animation: fadeIn 0.3s ease-in-out;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.login-form {
  flex: 1;
  padding: 20px;
}
.login-logo {
      display: flex;
  flex-direction: column;
  align-items: center;
}
.login-form h2 {
  text-align: center;
  color: #333;
  width: 100%;
  margin-bottom: 20px;
}
.form-group {
  margin-bottom: 15px;
}
.form-group label {
  display: block;
  margin-bottom: 5px;
  color: #555;
}
.form-group input {
  width: 100%;
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 4px;
  box-sizing: border-box;
}
.login-btn {
  width: 100%;
  padding: 10px;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s;
}

.back-link {
  margin-top: 15px;
  text-align: center;
}

.back-link a {
  color: #17a2b8;
  text-decoration: none;
}

.back-link a:hover {
  text-decoration: underline;
}

.error-message {
  background-color: #ffebee;
  color: #c62828;
  padding: 10px;
  border-radius: 4px;
  margin-bottom: 15px;
  border: 1px solid #ffcdd2;
  font-size: 14px;
}

.success-message {
  background-color: #e8f5e8;
  color: #2e7d32;
  padding: 10px;
  border-radius: 4px;
  margin-bottom: 15px;
  border: 1px solid #c8e6c9;
  font-size: 14px;
}

.loading-message {
  background-color: #e3f2fd;
  color: #1976d2;
  padding: 10px;
  border-radius: 4px;
  margin-bottom: 15px;
  border: 1px solid #bbdefb;
  font-size: 14px;
  text-align: center;
}

.login-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}