body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f5f5f5;
  color: #333;
  text-align: center;
}

header {
  padding: 30px;
  background: #0073e6;
  color: #fff;
  height: 80px;
}

.themes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); /* bigger cards */
  gap: 30px;
  padding: 50px;
  max-width: 1400px; /* wider grid */
  margin: auto;
}

.themes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr)); /* Bigger min size */
  gap: 40px;             /* More spacing between cards */
  padding: 60px;
  max-width: 1600px;     /* Allow wide layout */
  margin: auto;
}

.theme-card {
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  padding: 30px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.theme-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0,0,0,0.3);
}

.theme-card img {
  width: 100%;
  height: 300px;          /* Bigger image preview */
  border-radius: 10px;
  margin-bottom: 25px;
  object-fit: cover;      /* Crop nicely */
}

.theme-card h3 {
  margin: 20px 0;
  font-size: 1.5rem;      /* Larger title */
  font-weight: 700;
  color: #222;
}

.btn {
  display: inline-block;
  padding: 15px 30px;     /* Bigger button */
  background: #0073e6;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.3s;
}

.btn:hover {
  background: #005bb5;
}