body {
  margin: 0;
  background: #060b1a;
  color: white;
  font-family: system-ui, sans-serif;
}

.header {
  padding: 16px 24px;
  border-bottom: 1px solid #1e2a4a;
}

.level {
  padding: 24px;
}

.level-bar {
  background: #5e60e7;
  padding: 12px 16px;
  border-radius: 6px;
  font-weight: 600;
  margin-bottom: 16px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.card {
  padding: 12px;
  border: 1px solid #3a4b7a;
  border-radius: 8px;
  cursor: pointer;
}

.sidebar {
  position: fixed;
  top: 0;
  right: 0;
  width: 420px;
  height: 100vh;
  background: #0b1020;
  border-left: 1px solid #2a3558;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  z-index: 9999;
  overflow-y: auto;
}

.sidebar.open {
  transform: translateX(0);
}

.close-btn {
  background: none;
  color: white;
  font-size: 24px;
  border: none;
  cursor: pointer;
  padding: 12px;
}

body.sidebar-open {
  overflow: hidden;
}

.search-bar {
  margin-top: 12px;
}

.search-bar input {
  width: 280px;
  max-width: 90%;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.25);
  background: #0b1220;
  color: #fff;
  font-size: 14px;
}

.search-bar input::placeholder {
  color: rgba(255,255,255,0.5);
}