body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #0a0a0f, #140f2b);
  color: #fff;
}

/* Container */
.container {
  padding: 20px;
}

/* Header */
.header h1 {
  margin: 0;
  font-size: 28px;
  color: #a855f7;
}

.header p {
  color: #888;
  margin-bottom: 20px;
}

/* Grid layout */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

/* Cards */
.card {
  background: rgba(20, 20, 40, 0.8);
  border: 1px solid rgba(168, 85, 247, 0.2);
  border-radius: 12px;
  padding: 20px;
  backdrop-filter: blur(10px);
}

.card h2 {
  margin-top: 0;
  color: #a855f7;
}

/* Buttons */
.btn {
  width: 100%;
  padding: 10px;
  margin-top: 10px;
  border: none;
  border-radius: 8px;
  background: #1f1f3a;
  color: #fff;
  cursor: pointer;
  transition: 0.2s;
}

.btn:hover {
  background: #2c2c5a;
}

/* Primary */
.btn.primary {
  background: #6d28d9;
}

.btn.primary:hover {
  background: #7c3aed;
}

/* Danger */
.btn.danger {
  background: #dc2626;
}

.btn.danger:hover {
  background: #ef4444;
}

/* Output */
.output pre {
  background: #0f0f1f;
  padding: 10px;
  border-radius: 8px;
  height: 150px;
  overflow-y: auto;
  font-size: 13px;
}

/* Responsive */
@media (max-width: 600px) {
  .header h1 {
    font-size: 22px;
  }
}

/* Top bar */
.topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #0f0f1f;
  padding: 10px;
  border-bottom: 1px solid #2a2a55;
}

.topbar h1 {
  font-size: 18px;
}

/* Menu button */
.menu-btn {
  font-size: 20px;
  background: none;
  border: none;
  color: white;
  cursor: pointer;
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: -220px;
  width: 200px;
  height: 100%;
  background: #0f0f1f;
  border-right: 1px solid #2a2a55;
  padding-top: 60px;
  transition: 0.3s;
  z-index: 1000;
}

.sidebar a {
  display: block;
  color: white;
  padding: 15px;
  text-decoration: none;
}

.sidebar a:hover {
  background: #1f1f3a;
}

/* Active sidebar */
.sidebar.active {
  left: 0;
}

/* Back button in top bar */
.top-back {
  margin-left: 10px;
  padding: 8px 20px;
  background: #6d28d9;
  border: none;
  color: white;
  border-radius: 6px;
  cursor: pointer;
}

.top-back:hover {
  background: #7c3aed;
}

/* adjust spacing so title not cramped */
.topbar h1 {
  margin-left: 10px;
  font-size: 18px;
}