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

body {
  background: #f9fafb;
  color: #111827;
  line-height: 1.6;
}

/* Header */
header {
  background: #111827;
  color: #fff;
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  font-size: 24px;
}

nav a {
  color: #fff;
  margin-left: 20px;
  text-decoration: none;
  font-weight: 500;
}

nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 22px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1001;
}

.menu-toggle .bar {
  height: 3px;
  width: 100%;
  background-color: #fff;
  border-radius: 2px;
  transition: all 0.3s ease;
}

@media (max-width: 768px) {
  nav {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    right: 20px;
    background: #111827;
    padding: 20px;
    border-radius: 12px;
    border: 2px solid #4b5563;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    transform: translateY(-20px);
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 1000;
  }

  nav.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .menu-toggle {
    display: flex;
  }
}

/* Checkout Container */
.checkout-container {
  max-width: 800px;
  margin: 40px auto;
  background: #fff;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

.checkout-container h2 {
  margin-bottom: 20px;
  font-size: 28px;
  color: #111827;
}

/* Product Summary */
.order-summary {
  display: flex;
  align-items: center;
  margin-bottom: 30px;
  gap: 20px;
}

.order-summary img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 12px;
  border: 2px solid #e5e7eb;
}

.order-item span {
  font-size: 20px;
  font-weight: 600;
  color: #1f2937;
}

.order-item p {
  color: #6b7280;
  font-size: 14px;
  margin: 10px 0;
}

.order-item strong {
  display: block;
  margin-top: 5px;
  font-size: 16px;
  color: #111827;
}

/* Form Styles */
form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-weight: 500;
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 15px;
  background: #f9fafb;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #6366f1;
  background: #fff;
}

/* Button */
.checkout-btn {
  background-color: #6366f1;
  color: white;
  padding: 14px;
  font-size: 16px;
  border: none;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s ease;
}

.checkout-btn:hover {
  background-color: #4f46e5;
}

/* Footer */
footer {
  text-align: center;
  padding: 30px;
  background: #f3f4f6;
  font-size: 14px;
  color: #6b7280;
  margin-top: 40px;
}