.exercise {
  margin-bottom: 60px;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 20px;
  padding: 20px;
}

.card {
  background-color: white;
  border: 1px solid #e1e4e8;
  border-radius: 12px;
  padding: 50px 20px;
  text-align: center;
  font-weight: bold;
  color: #2d3436;
  transition: 0.3s;
  box-shadow: 0 2px 5px rgba(0,0,0,0.02);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
  border-color: #0984e3;
  color: #0984e3;
  cursor: pointer;
}

.page-layout {
  display: grid;
  height: 100vh;
  grid-template-columns: 200px 1fr;
  grid-template-rows: auto 1fr auto;
  grid-template-areas:
    "header header"
    "sidebar main"
    "footer footer";
  gap: 10px;
}

.header {
  grid-area: header;
  background: #0984e3;
  color: white;
  padding: 20px;
}

.sidebar {
  grid-area: sidebar;
  background: #dfe6e9;
  padding: 20px;
}

.main {
  grid-area: main;
  background: white;
  padding: 20px;
}

.footer {
  grid-area: footer;
  background: #2d3436;
  color: white;
  padding: 15px;
  text-align: center;
}