body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: #f8f9fa;
  color: #000;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* HEADER dengan GRADIENT */
header {
  background: linear-gradient(to left, #3399ff, #004080); /* biru terang ke navy terang */
  color: white;
  padding: 20px;
  text-align: left;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
}

.main {
  flex: 1;
  display: flex;
}

.sidebar {
  width: 220px;
  background: linear-gradient(to bottom, #007bdf, #005ccc, #003070);
  padding: 20px;
}

.sidebar a {
  display: block;
  margin-bottom: 12px;
  padding: 10px 15px;
  border-radius: 8px;
  font-weight: 500;
  text-decoration: none;
  color: white;
  transition: all 0.3s ease;
  background: linear-gradient(to right, #007bff, #0056b3);
}

.sidebar a:hover {
  background: linear-gradient(to right, #3399ff, #0047ab);
  transform: scale(1.02);
}

.sidebar a.active {
  background: linear-gradient(to left, #004080, #003366) !important;
  color: #ffffff !important;
  font-weight: bold;
  transition: all 0.3s ease;
}

.content {
  flex: 1;
  padding: 25px;
  background-color: #ffffff;
}

.footer {
  background: linear-gradient(to left, #004080, #003366);
  text-align: center;
  padding: 12px;
  font-size: 14px;
  color: white;
}

.btn-gradient {
  background: linear-gradient(to right, #007bff, #0056b3);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 6px;
  font-weight: 500;
  transition: 0.3s ease;
}

.btn-gradient:hover {
  background: linear-gradient(to right, #3399ff, #0047ab);
  transform: scale(1.05);
}

.identitas-card {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 123, 255, 0.15);
  background: linear-gradient(to bottom, #ffffff, #f4f9ff);
}

.identitas-header {
  background: linear-gradient(to right, #007bff, #093f8a);
  font-size: 1.1rem;
  padding: 15px 20px;
  border-bottom: none;
}

.identitas-card .card-body {
  padding: 25px;
}