body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #cce7ff;
  margin: 0;
  color: #333;
}

.navbar {
  display: flex;
  background: #3399ff;
  padding: 10px 20px;
  gap: 10px;
  flex-wrap: wrap;
}

.navbar a {
  color: #fff;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 6px;
}

.navbar a:hover, .navbar a.active {
  background: #007acc;
}

section {
  display: none;
  padding: 20px;
}

section.active {
  display: block;
}

form {
  background: #fff;
  padding: 20px;
  border-radius: 12px;
  max-width: 420px;
  margin: 20px auto;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

input, button, select {
  width: 100%;
  padding: 10px;
  margin-top: 8px;
  border-radius: 6px;
  border: 1px solid #ccc;
}

button {
  background: #3399ff;
  color: #fff;
  border: none;
  cursor: pointer;
}

button:hover {
  background: #007acc;
}

table {
  width: 95%;
  margin: 10px auto;
  border-collapse: collapse;
}

th, td {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: center;
}

th {
  background: #99ccff;
}

img {
  border-radius: 8px;
}

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  background: #007acc;
  color: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  opacity: 0;
  transition: opacity 0.3s;
}

.toast.show {
  opacity: 1;
}