/* Topbar */
.topbar {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 60px;
  background: rgba(20,20,30,0.9);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  z-index: 1000;
  backdrop-filter: blur(10px);
}
.topbar h1 { font-size: 1.5rem; }
.user-info { display: flex; align-items: center; gap: 10px; }
.user-info img {
  width: 35px; height: 35px;
  border-radius: 50%;
  border: 2px solid #7289DA;
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: 60px; left: 0;
  width: 220px;
  height: calc(100% - 60px);
  background: rgba(15,15,25,0.9);
  display: flex;
  flex-direction: column;
  padding-top: 20px;
  backdrop-filter: blur(10px);
}
.sidebar a {
  padding: 15px 20px;
  color: #bbb;
  text-decoration: none;
  transition: background 0.3s, color 0.3s;
}
.sidebar a i { margin-right: 10px; }
.sidebar a:hover {
  background: #7289DA;
  color: #fff;
}

/* Main */
.main-content {
  margin-left: 240px;
  margin-top: 80px;
  padding: 20px;
}
.hidden { display: none; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.center {
  text-align: center;
  padding: 40px;
}

/* Cards Glass Effect */
.card {
  background: rgba(255,255,255,0.05);
  border-radius: 15px;
  padding: 20px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
  backdrop-filter: blur(8px);
  transition: transform 0.3s, background 0.3s;
}
.card:hover {
  transform: translateY(-5px);
  background: rgba(255,255,255,0.1);
}