/* Design System - Luxury Jewelry Store */
:root {
  /* Colors */
  --color-primary: #1a3a4a; /* Deep navy - luxury */
  --color-accent: #c9a86c; /* Gold/champagne */
  --color-bg: #faf8f4; /* Warm off-white */
  --color-text: #2d2d2d; /* Dark charcoal */
  --color-text-light: #6b6b6b;
  --color-white: #ffffff;
  --color-border: #e0e0e0;
  --color-success: #2e7d32;
  --color-error: #c62828;

  /* Typography */
  --font-display: 'Playfair Display', serif;
  --font-body: 'Lato', sans-serif;

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-xxl: 64px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* Transitions */
  --transition: all 0.2s ease;
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

h1 { font-size: clamp(36px, 5vw, 72px); }
h2 { font-size: clamp(30px, 4vw, 48px); }
h3 { font-size: clamp(24px, 3vw, 36px); }
h4 { font-size: 20px; }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-light);
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-align: center;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: #0f2a38;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(250, 248, 244, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: var(--transition);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.03em;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-links a {
  font-weight: 500;
  color: var(--color-text);
  position: relative;
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

.cart-btn {
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--color-text);
  transition: var(--transition);
}

.cart-btn:hover {
  color: var(--color-primary);
}

.cart-count {
  position: absolute;
  top: 0;
  right: 0;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 11px;
  font-weight: 600;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #0f2a38 100%);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.2);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--color-white);
  max-width: 800px;
  padding: var(--spacing-md);
  animation: fadeUp 0.8s ease-out;
}

.hero-title {
  font-size: clamp(42px, 6vw, 72px);
  margin-bottom: var(--spacing-md);
  color: var(--color-white);
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
  font-size: clamp(18px, 2vw, 24px);
  margin-bottom: var(--spacing-xl);
  color: rgba(255,255,255,0.9);
  font-weight: 300;
  line-height: 1.6;
}

/* Section Styles */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-title {
  margin-bottom: var(--spacing-sm);
}

.section-subtitle {
  font-size: 18px;
  max-width: 600px;
  margin: 0 auto;
}

/* Collection / Products */
.collection {
  padding: var(--spacing-xxl) 0;
  background-color: var(--color-bg);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.product-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.product-image {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  background-color: #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.product-card:hover .product-image img {
  transform: scale(1.05);
}

.no-image {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
  color: #999;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  padding: 20px;
}

.product-badge {
  position: absolute;
  top: var(--spacing-sm);
  left: var(--spacing-sm);
  background-color: var(--color-accent);
  color: var(--color-white);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.product-info {
  padding: var(--spacing-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-primary);
}

.product-description {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-sm);
  line-height: 1.5;
  flex: 1;
}

.product-price {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.product-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.product-actions .btn {
  flex: 1;
  padding: 12px 16px;
  font-size: 14px;
}

/* About Section */
.about {
  padding: var(--spacing-xxl) 0;
  background-color: var(--color-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 3/4;
  background-color: #f0f0f0;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-content .section-title {
  text-align: left;
  margin-bottom: var(--spacing-md);
}

.about-content p {
  margin-bottom: var(--spacing-md);
  font-size: 17px;
  line-height: 1.7;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 500;
}

.feature-icon {
  color: var(--color-accent);
  font-size: 18px;
}

/* Contact Section */
.contact {
  padding: var(--spacing-xxl) 0;
  background-color: var(--color-bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-item h4 {
  font-family: var(--font-display);
  font-size: 18px;
  margin-bottom: var(--spacing-xs);
  color: var(--color-primary);
}

.contact-item p {
  color: var(--color-text-light);
  line-height: 1.6;
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}

.social-links a:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.contact-form input,
.contact-form textarea {
  padding: 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 16px;
  transition: var(--transition);
  background-color: var(--color-white);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 58, 74, 0.1);
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

/* Footer */
.footer {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand h3 {
  font-family: var(--font-display);
  font-size: 24px;
  margin-bottom: var(--spacing-xs);
  color: var(--color-white);
}

.footer-brand p {
  color: rgba(255,255,255,0.7);
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-links a {
  color: rgba(255,255,255,0.8);
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  text-align: center;
  color: rgba(255,255,255,0.6);
  font-size: 14px;
}

/* Cart Sidebar */
.cart-sidebar {
  position: fixed;
  top: 0;
  right: -400px;
  width: 400px;
  max-width: 90vw;
  height: 100vh;
  background: var(--color-white);
  box-shadow: -4px 0 24px rgba(0,0,0,0.15);
  z-index: 2000;
  transition: right 0.3s ease;
  display: flex;
  flex-direction: column;
}

.cart-sidebar.open {
  right: 0;
}

.cart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.cart-header h3 {
  font-family: var(--font-display);
  font-size: 22px;
}

.close-cart {
  background: none;
  border: none;
  font-size: 32px;
  cursor: pointer;
  color: var(--color-text-light);
  line-height: 1;
  transition: var(--transition);
}

.close-cart:hover {
  color: var(--color-primary);
}

.cart-items {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
}

.cart-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.cart-item-image {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background-color: #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cart-item-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cart-item-details {
  flex: 1;
}

.cart-item-name {
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--color-primary);
}

.cart-item-price {
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
}

.cart-item-quantity {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.qty-btn {
  width: 28px;
  height: 28px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  border-radius: 4px;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.qty-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.cart-item-remove {
  background: none;
  border: none;
  color: var(--color-text-light);
  cursor: pointer;
  font-size: 20px;
  margin-left: auto;
  transition: var(--transition);
}

.cart-item-remove:hover {
  color: var(--color-error);
}

.cart-footer {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.cart-total {
  display: flex;
  justify-content: space-between;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.checkout-btn {
  width: 100%;
}

/* Overlay */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1500;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Loading */
.loading {
  position: fixed;
  inset: 0;
  background: rgba(250, 248, 244, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.loading.active {
  opacity: 1;
  visibility: visible;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero {
    background-attachment: scroll;
    min-height: 500px;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .about-image {
    order: -1;
  }

  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--spacing-md);
  }

  .cart-sidebar {
    width: 100%;
    right: -100%;
  }

  .footer-content {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .btn {
    padding: 12px 24px;
    font-size: 15px;
  }
}