body {
  background: linear-gradient(
    135deg,
    #0f2027,
    #203a43,
    #2c5364
  ); /* Dark gradient */
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  color: white; /* Default text color */
  font-family: Arial, sans-serif;
}

.card {
  background: rgba(0, 0, 0, 0.3); /* Dark transparent glass */
  backdrop-filter: blur(12px); /* Frosted effect */
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1); /* Subtle glass border */
  border-radius: 16px;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.6); /* Deep shadow for dark mode */
  color: #e0e0e0; /* Softer text color */
  margin: 10px;
}

.card h5 {
  color: #ffffff; /* Keep titles bright */
}

.btn.btn-primary {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
  color: #fff;
  transition: 0.3s ease;
}

.btn.btn-primary:hover {
  background: rgba(255, 255, 255, 0.3);
}

.visualBox {
  height: 375px;
  width: 90vw; /* responsive to screen size */
  max-width: 1400px;
  margin: 20px auto;
  border: solid #0f2027 2px;
  background-color: #0f2027;
  display: flex;
  align-items: flex-end; /* Bars grow upward */
  justify-content: space-between; /* evenly distribute */
  padding: 10px;
  overflow: hidden;
  box-sizing: border-box;
}

.bar {
  flex: 1; /* make bars auto-fit */
  margin: 0 2px; /* spacing */
  background: linear-gradient(135deg, #00c6ff, #0072ff);
  border-radius: 4px 4px 0 0;
  transition: height 0.3s ease;
}

.code {
  margin: 50px;
  background: rgba(255, 255, 255, 0.1);
  padding: 10px;
  border-radius: 8px;
  color: #e0e0e0; /* Softer text color for code */
}