* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}
:root {
  --bg: #f8fafc;
  --text: #1e293b;
  --card: #ffffff;
  --primary: #2563eb;
  --secondary: #e2e8f0;
  --border: #e2e8f0;
  --shadow: 0 8px 20px rgba(0,0,0,0.05);
}

body.dark {
  --bg: #0b1220;              /* deeper navy */
  --text: #e5e7eb;            /* soft white */
  --card: #111827;            /* darker card */
  --primary: #3b82f6;
  --secondary: #1f2937;
  --border: #374151;
  --shadow: 0 10px 30px rgba(0,0,0,0.6);
}

body {
  background: var(--bg);
  color: var(--text);
  transition: background 0.3s ease, color 0.3s ease;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 40px;
  background: var(--card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.search-bar {
  width: 300px;
  padding: 8px 15px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
}

.search-bar:focus {
  outline: none;
  border-color: var(--primary);
}

.section {
  padding: 40px;
}
.section h2 {
  margin-bottom: 20px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px,1fr));
  gap: 20px;
}

.product-card {
  background: var(--card);
  padding: 15px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, background 0.3s ease;
}
body.dark .product-card {
  border: 1px solid var(--border);
}

.product-card:hover {
  transform: translateY(-6px);
}

.product-card img {
  width: 100%;
  height: 180px;
  object-fit: contain;
}

.product-card button,
.checkout-btn,
.theme-btn {
  padding: 8px 15px;
  margin-top: 10px;
  border: none;
  border-radius: 6px;
  background: var(--primary);
  color: white;
  cursor: pointer;
  transition: 0.2s ease;
}

.product-card button:hover,
.checkout-btn:hover,
.theme-btn:hover {
  opacity: 0.9;
}

.cart-link {
  text-decoration: none;
  font-size: 22px;
  position: relative;
  color: var(--text);
}

.cart-count {
  background: crimson;
  color: white;
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 50%;
  position: absolute;
  top: -8px;
  right: -10px;
}

.cart-wrapper {
  width: 100%;
  max-width: 600px;
  margin: 60px auto;
  background: var(--card);
  padding: 35px;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.cart-wrapper h2 {
  text-align: center;
  margin-bottom: 25px;
}

.cart-total {
  margin-top: 25px;
  font-size: 22px;
  font-weight: 600;
}

.cart-item {
  display: flex;
  gap: 20px;
  align-items: center;
  background: var(--secondary);
  padding: 15px;
  border-radius: 12px;
  margin-bottom: 15px;
}

.cart-item img {
  width: 90px;
  height: 90px;
  object-fit: contain;
  border-radius: 8px;
  background: var(--card);
  padding: 5px;
}

.cart-info {
  flex: 1;
}

.cart-controls button {
  padding: 6px 12px;
  margin-right: 8px;
  border: none;
  background: var(--secondary);
  border-radius: 6px;
  cursor: pointer;
  color: var(--text);
}

.cart-controls button:hover {
  background: var(--border);
}

.hidden {
  display: none;
}