:root {
  --bg-white: #FFFFFF;
  --text-dark: #1C1C1E;
  --text-muted: #6B6E76;
  --accent: #d9b382;
  --card: #F8F6F3;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  background: #fff;
  color: var(--text-dark);
}

nav {
  padding: 28px 8%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #E3E3E3;
  position: relative;
}

nav h1 {
  letter-spacing: 3px;
  font-weight: 600;
  font-size: 2rem;
}

nav a {
  text-decoration: none;
  color: var(--text-muted);
  margin-left: 25px;
}

nav a:hover {
  color: var(--text-dark);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.hamburger div {
  width: 25px;
  height: 3px;
  background: var(--text-dark);
}

.mobile-menu {
  display: none;
  flex-direction: column;
  position: absolute;
  top: 70px;
  left: 0;
  width: 100%;
  background: white;
  padding: 20px;
  border-bottom: 1px solid #E3E3E3;
  z-index: 1000;
}

.mobile-menu.show {
  display: flex;
}

.mobile-menu a {
  padding: 12px 0;
  border-bottom: 1px solid #eee;
}

main {
  max-width: 720px;
  margin: 40px auto 80px;
  padding: 0 20px;
}

#back-shop {
  margin-bottom: 20px;
  display: inline-block;
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 600;
  border: 1px solid var(--text-dark);
  padding: 8px 16px;
  border-radius: 6px;
  transition: 0.2s;
}

#back-shop:hover {
  background: var(--text-dark);
  color: #fff;
}

main h1 {
  margin-bottom: 30px;
  font-size: 2rem;
  text-align: center;
}

#cart-container {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.cart-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
  border-radius: 12px;
  background: #F5F0EC;
}

.qty-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.qty-controls button {
  padding: 3px 10px;
  border: none;
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  cursor: pointer;
}

.remove-btn {
  background: #e74c3c;
  border: none;
  color: #fff;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
}

#summary {
  margin-top: 30px;
  padding: 20px;
  background: var(--card);
  border-radius: 16px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

#summary div {
  display: flex;
  justify-content: space-between;
  margin: 8px 0;
}

.total {
  font-size: 1.2rem;
  font-weight: 600;
  border-top: 1px solid #ddd;
  margin-top: 12px;
  padding-top: 10px;
}

.free-ship-msg {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.secure-checkout {
  text-align: center;
  font-size: 0.9rem;
  margin-top: 15px;
  color: var(--text-muted);
}

#paypal-button-container {
  margin-top: 20px;
  display: flex;
  justify-content: center;
}

footer {
  padding: 50px 8%;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-top: 1px solid #E3E3E3;
  text-align: center;
  margin-top: 50px;
}

@media (max-width: 768px) {
  .nav-links a {
    margin: 10px 0;
    font-size: 16px;
  }

   .btn {
    width: 100%;
    text-align: center;
  }
  
  .btn:active {
  transform: scale(0.96);
}
}