:root {
  --primary-color: #4a90e2;
  --secondary-color: #f5a623;
  /* --background-color: #f0f4f8; */
  --background-color: #063973;
  --text-color: #333;
  --error-color: #e74c3c;
  --success-color: #2ecc71;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  background-color: var(--background-color);
  color: var(--text-color);
}

#app {
  background-color: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.08);
  max-width: 400px;
  width: 100%;
  transition: all 0.3s ease;
}

h1 {
  text-align: center;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

form {
  display: flex;
  flex-direction: column;
}

label {
  margin-top: 1rem;
  font-weight: 500;
  color: var(--text-color);
}

input {
  padding: 0.75rem;
  margin-top: 0.25rem;
  border: 1px solid #e1e1e1;
  border-radius: 6px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}

button {
  margin-top: 1.5rem;
  padding: 0.75rem 1rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  transition: background-color 0.3s ease, transform 0.1s ease;
}

button:hover {
  background-color: #3a7bc8;
}

button:active {
  transform: translateY(1px);
}

.error-message {
  color: var(--error-color);
  margin-top: 1rem;
  font-size: 0.9rem;
  text-align: center;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #3a7bc8;
  text-decoration: underline;
}

#login-container,
#register-container,
#admin-dashboard {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

#login-container:not([style*="display: none"]),
#register-container:not([style*="display: none"]),
#admin-dashboard:not([style*="display: none"]) {
  opacity: 1;
  transform: translateY(0);
}

#admin-dashboard {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 480px) {
  #app {
    padding: 1.5rem;
    border-radius: 0;
    box-shadow: none;
  }
}