/* Basic Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', sans-serif;
  background: #fdfdfd;
  color: #333;
  line-height: 1.6;
}

header {
  background: #2c3e50;
  color: #fff;
  padding: 2rem 1rem;
  text-align: center;
}

.container {
  display: flex;
  flex-wrap: wrap;
  max-width: 1000px;
  margin: 2rem auto;
  padding: 0 1rem;
}

main {
  flex: 3;
  padding: 1rem;
}

aside {
  flex: 1;
  background: #f1f1f1;
  padding: 1rem;
  border-radius: 6px;
  margin-left: 1rem;
  height: fit-content;
}

.empty-message {
  background: #fafafa;
  padding: 2rem;
  text-align: center;
  border: 2px dashed #ccc;
  border-radius: 8px;
}

footer {
  text-align: center;
  background: #2c3e50;
  color: #fff;
  padding: 1rem;
  margin-top: 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    flex-direction: column;
  }

  aside {
    margin-left: 0;
    margin-top: 1rem;
  }
}