body {
  font-family: Arial, sans-serif;
  background-color: #f9f9f9;
  color: #222;
  margin: 0;
  padding: 0;
}

header {
  background-color: #008080;
  color: white;
  text-align: center;
  padding: 1em 0;
}

nav ul {
  list-style-type: none;
  padding: 0;
  background-color: #006666;
  margin: 0;
  overflow: hidden;
}

nav li {
  display: inline-block;
}

nav a {
  display: block;
  color: white;
  padding: 14px 20px;
  text-decoration: none;
}

nav a:hover {
  background-color: #004c4c;
}

.form-box {
  width: 60%;
  margin: 30px auto;
  background-color: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.form-box label {
  display: block;
  margin-top: 10px;
  font-weight: bold;
}

.form-box input, .form-box select {
  width: 100%;
  padding: 8px;
  margin-top: 5px;
  border-radius: 5px;
  border: 1px solid #ccc;
}

button {
  background-color: #008080;
  color: white;
  padding: 10px 15px;
  margin-top: 15px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #006666;
}

.data-table {
  width: 80%;
  margin: 30px auto;
  border-collapse: collapse;
  background: white;
}

.data-table th, .data-table td {
  border: 1px solid #ccc;
  padding: 10px;
  text-align: left;
}

.data-table th {
  background-color: #008080;
  color: white;
}

.back-link {
  display: block;
  text-align: center;
  margin: 20px;
  color: #008080;
  text-decoration: none;
}

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

.role-login {
  text-align: center;
  margin: 40px auto;
}

.role-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.role-btn {
  background-color: #008080;
  color: white;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 6px;
  transition: 0.3s;
}

.role-btn:hover {
  background-color: #004c4c;
}

.role-card {
  background-color: white;
  width: 70%;
  margin: 20px auto;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.role-card h2 {
  color: #008080;
}

.role-card ul {
  list-style: none;
  padding: 0;
}

.role-card li {
  padding: 5px 0;
  font-size: 1rem;
}