:root {
  --primary-color: #4CAF50;
  --primary-dark: #45a049;
  --text-color: #333;
  --bg-color: #f3f3f3;
  --card-bg: #fff;
  --border-color: #ddd;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;
  --modal-bg: rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] {
  --primary-color: #66bb6a;
  --primary-dark: #4caf50;
  --text-color: #e0e0e0;
  --bg-color: #121212;
  --card-bg: #1e1e1e;
  --border-color: #333;
  --shadow-color: rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text-color);
  background-color: var(--bg-color);
  transition: background-color 0.3s, color 0.3s;
  min-height: 100vh;
}

.header {
  background-color: var(--primary-color);
  padding: 1rem 2rem;
  color: white;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px var(--shadow-color);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: bold;
  color: white;
  text-decoration: none;
  transition: transform 0.2s;
}

.logo:hover {
  transform: scale(1.05);
}

.logo img {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.main-menu {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.main-menu a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: all 0.2s;
  position: relative;
}

.main-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: white;
  transition: all 0.3s;
  transform: translateX(-50%);
}

.main-menu a:hover::after {
  width: 80%;
}

.main-menu a.active::after {
  width: 80%;
}

.theme-toggle {
  background: none;
  border: none;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: transform 0.3s;
}

.theme-toggle:hover {
  transform: rotate(45deg);
}

main {
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.main-title {
  font-family: var(--font-heading);
  font-weight: bold;
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-color);
}

.sushi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  padding: 1rem;
}

.sushi-item {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 4px 6px var(--shadow-color);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.sushi-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 8px 12px var(--shadow-color);
}

.sushi-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.3s;
}

.sushi-item:hover img {
  transform: scale(1.05);
}

.sushi-content {
  padding: 1.5rem;
}

.sushi-item h2 {
  font-family: var(--font-heading);
  margin: 0;
  font-size: 1.4rem;
  color: var(--text-color);
}

.sushi-item p {
  margin: 0.75rem 0;
  color: var(--text-color);
  font-size: 0.95rem;
  line-height: 1.5;
}

.price {
  font-size: 1.4rem;
  font-weight: bold;
  color: var(--primary-color);
  margin: 1rem 0;
}

.quantity-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.quantity-controls button {
  width: 35px;
  height: 35px;
  border: none;
  background-color: var(--primary-color);
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.quantity-controls button:hover {
  background-color: var(--primary-dark);
  transform: scale(1.1);
}

.quantity-controls input {
  width: 60px;
  height: 35px;
  text-align: center;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  background: var(--card-bg);
  color: var(--text-color);
}

.add-to-cart-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  transition: all 0.2s;
  width: 100%;
  margin-top: 1rem;
}

.add-to-cart-btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
}

.cart-button {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1.5rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  box-shadow: 0 4px 6px var(--shadow-color);
  transition: all 0.3s;
  z-index: 100;
}

.cart-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 8px var(--shadow-color);
}

/* Modal Styles */
.cart-modal,
.payment-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--modal-bg);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.cart-modal-content,
.payment-modal-content {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.cart-items {
  margin: 1.5rem 0;
}

.cart-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
}

.cart-total {
  margin: 1.5rem 0;
  font-size: 1.2rem;
  font-weight: bold;
  text-align: right;
}

.pay-button,
.pay-submit-button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  width: 100%;
  margin-bottom: 1rem;
  transition: all 0.2s;
}

.pay-button:hover,
.pay-submit-button:hover {
  background-color: var(--primary-dark);
}

.pay-button:disabled {
  background-color: var(--border-color);
  cursor: not-allowed;
}

.close-modal {
  background-color: transparent;
  border: 2px solid var(--border-color);
  color: var(--text-color);
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  font-size: 1rem;
  width: 100%;
  transition: all 0.2s;
}

.close-modal:hover {
  background-color: var(--border-color);
}

.juice-number {
  font-size: 1.5rem;
  font-weight: bold;
  text-align: center;
  padding: 1rem;
  margin: 1rem 0;
  background-color: var(--bg-color);
  border-radius: 8px;
  border: 2px solid var(--primary-color);
}

.payment-amount-display {
  font-size: 1.2rem;
  text-align: center;
  margin: 1rem 0;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text-color);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.delivery-option {
  margin: 1rem 0;
}

.delivery-address {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .header {
    padding: 1rem;
  }

  .main-menu {
    gap: 1rem;
  }

  .main-title {
    font-size: 2rem;
  }

  .sushi-grid {
    grid-template-columns: 1fr;
  }

  .cart-button {
    bottom: 1rem;
    right: 1rem;
    padding: 0.75rem 1rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}

/* Animation Classes */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease-out forwards;
}