/* General Styles */
body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  background-color: #f9f9f9;
  color: #333;
}

header {
  background-color: #283593;
  padding: 1rem;
  text-align: center;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
}

header h1 {
  margin: 0;
  color: #fff;
  font-size: 2rem;
}

nav {
  margin-top: 0.5rem;
}

nav a {
  margin: 0 1rem;
  color: #fff;
  text-decoration: none;
  font-weight: 500;
}

nav a:hover {
  color: #ffeb3b;
}

main {
  padding-top: 140px; /* Space for fixed header */
}

.content-section {
  display: none;
  padding: 2rem;
  max-width: 900px;
  margin: auto;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.content-section.active {
  display: block;
}

h1, h2, h3, h4 {
  color: #283593;
}

.project {
  margin-bottom: 1rem;
  padding: 1rem;
  border: 1px solid #ddd;
  border-radius: 5px;
  background-color: #fafafa;
}

.project h4 {
  margin: 0 0 0.5rem;
}

/* Product Catalog Section */
#productGrid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  padding: 1rem;
}

.product-card {
  border: 1px solid #ddd;
  padding: 1rem;
  border-radius: 5px;
  text-align: center;
  background-color: #fff;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  height: auto;
}

.product-card img {
  width: 100%;
  height: auto;
  border-radius: 5px;
  margin-bottom: 0.5rem;
}

.product-card h4,
.product-card p {
  margin: 0.5rem 0;
}

/* To-Do List (Restored Better Style) */
#todoList li {
  background-color: #fafafa;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 5px;
  margin-bottom: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
}

#todoList button {
  background-color: #e53935;
  color: white;
  border: none;
  padding: 0.4rem 0.75rem;
  border-radius: 3px;
  cursor: pointer;
}

#todoList button:hover {
  background-color: #c62828;
}

#todoForm input {
  padding: 0.6rem;
  width: 70%;
  margin-right: 0.5rem;
  border-radius: 5px;
  border: 1px solid #ccc;
}

#todoForm button {
  padding: 0.6rem 1rem;
  background-color: #283593;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

#todoForm button:hover {
  background-color: #1a237e;
}

/* Footer */
footer {
  background-color: #283593;
  color: white;
  padding: 1rem;
  text-align: center;
  position: relative;
  bottom: 0;
  width: 100%;
  margin-top: 2rem;
}

/* Responsive */
@media (max-width: 600px) {
  #productGrid {
    grid-template-columns: 1fr; /* 1 per row on mobile */
  }
}