body {
    font-family: Arial, sans-serif;
    background: #f4f6fa;
    padding: 0;
}
.container {
    max-width: 450px;
    margin: auto;
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
h2 { text-align: center; }
select, input[type=text], button {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    border-radius: 6px;
    border: 1px solid #ccc;
}
button {
    background-color: #0078ff;
    color: white;
    cursor: pointer;
}
.message {
    margin-top: 15px;
    text-align: center;
    color: #333;
    font-weight: bold;
}
.danger-zone {
  background-color: #f8d7da;
  border: 2px solid #dc3545;
  padding: 15px;
  border-radius: 6px;
  margin: 15px 0;
  color: #721c24;
}
.btn-danger {
  background-color: #dc3545;
}
.btn-secondary {
  background-color: #6c757d;
  margin-top: 10px;
}
.warning {
  background-color: #fff3cd;
  border: 1px solid #ffc107;
  padding: 15px;
  border-radius: 6px;
  margin: 15px 0;
  color: #856404;
}

.navbar {
  background: #007bff;
  padding: 12px 0;
  margin-bottom: 25px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}
.nav-container {
  max-width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
}
.logo {
  color: white;
  font-size: 20px;
  margin: 0;
}
.nav-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 15px;
}
.nav-links li a {
  color: white;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 6px;
  transition: 0.2s;
  font-weight: 500;
}
.nav-links li a:hover {
  background: rgba(255,255,255,0.2);
}