/* ===== GLOBAL CLEAN LOOK ===== */
body {
  font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  background-color: #f8fafc;
  color: #1e293b;
}

/* ===== HERO BANNER ===== */
.catalog-hero {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  padding: 80px 20px;
  text-align: center;
  color: white;
}

.catalog-hero h1 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
}

.catalog-hero p {
  font-size: 18px;
  opacity: 0.85;
}

/* ===== COURSE CARD ===== */
.product-tile {
  border-radius: 16px !important;
  overflow: hidden;
  background: white;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  transition: all 0.3s ease;
  border: none !important;
}

.product-tile:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.12);
}

/* Course Image */
.product-tile img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* Course Title */
.product-tile h3 {
  font-size: 18px;
  font-weight: 600;
  margin-top: 10px;
}

/* Price */
.product-price {
  font-size: 16px;
  font-weight: 700;
  color: #0f172a;
}

/* Enroll Button */
.btn-primary {
  background: linear-gradient(90deg, #2563eb, #1d4ed8);
  border: none;
  border-radius: 10px;
  padding: 10px 18px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  background: linear-gradient(90deg, #1d4ed8, #1e40af);
  transform: scale(1.03);
}

/* ===== SEARCH BAR ===== */
.catalog-search input {
  border-radius: 12px;
  padding: 12px;
  border: 1px solid #e2e8f0;
}

.catalog-search input:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}

/* ===== CATEGORY SIDEBAR ===== */
.catalog-categories {
  background: white;
  padding: 20px;
  border-radius: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}