/* ==========================================================================
   CSS Design System for ÉLEVE E-Commerce
   Includes modern, responsive, dark-mode utilities and animations.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Jost:wght@300;400;500;600&display=swap');

:root {
  /* Core Colors (Dark Mode Default) */
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-tertiary: #1e1e1e;
  
  --text-primary: #f5f5f5;
  --text-secondary: #a0a0a0;
  
  --accent: #d4a853;
  --accent-hover: #e6be6a;
  
  --success: #34d399;
  --error: #ef4444;
  
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  
  /* Typography */
  --font-heading: 'Cormorant Garamond', serif;
  --font-body: 'Jost', sans-serif;
  --font-accent: 'Jost', sans-serif;
  
  /* Layout */
  --nav-height: 80px;
  --container-max: 1280px;
  --container-padding: 2rem;
  
  /* Animation */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --z-nav: 100;
  --z-modal: 200;
  --z-toast: 300;
}

[data-theme="light"] {
  --bg-primary: #fcfcfc;
  --bg-secondary: #f0f0f0;
  --bg-tertiary: #e5e5e5;
  
  --text-primary: #111111;
  --text-secondary: #555555;
  
  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* Subtle Premium Grain Overlay */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

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

button, input, select, textarea {
  font: inherit;
  border: none;
  background: none;
  color: inherit;
}

button {
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

/* ==========================================================================
   Typography Utilities
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
}

.text-accent { color: var(--accent); }
.text-muted { color: var(--text-secondary); }
.text-center { text-align: center; }

/* ==========================================================================
   Layout Utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.grid {
  display: grid;
  gap: 2rem;
}

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.gap-8 { gap: 2rem; }

/* ==========================================================================
   Components: Buttons & Inputs
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-family: var(--font-accent);
  font-weight: 500;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

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

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

.btn-accent:hover {
  background-color: var(--accent-hover);
}

.btn-outline {
  border: 1px solid var(--border);
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-block {
  width: 100%;
}

.input {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  transition: border-color var(--transition-fast);
}

.input:focus {
  outline: none;
  border-color: var(--accent);
}

/* ==========================================================================
   Components: Cards & Product Grid
   ========================================================================== */
.card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.4);
}

.product-card {
  position: relative;
  cursor: pointer;
  background: transparent;
  border: none;
  transition: transform var(--transition-normal);
}

.product-image-wrap {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
  border-radius: 8px;
  background-color: var(--bg-secondary);
  margin-bottom: 1rem;
}

.product-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.product-card .add-to-cart-quick {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%) translateY(150%);
  opacity: 0;
  transition: all var(--transition-normal);
  width: calc(100% - 2rem);
}

.product-card:hover .add-to-cart-quick {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.product-info {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.product-title {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.product-category {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.product-price {
  font-family: var(--font-accent);
  font-weight: 600;
  color: var(--accent);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background-color: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: var(--z-nav);
  transition: background-color var(--transition-normal), height var(--transition-normal), box-shadow var(--transition-normal);
}

.navbar.scrolled {
  height: 60px;
  background-color: rgba(10, 10, 10, 0.98);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
[data-theme="light"] .navbar.scrolled {
  background-color: rgba(252, 252, 252, 0.98);
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: relative;
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.cart-icon-wrap {
  position: relative;
  cursor: pointer;
}

.cart-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background-color: var(--accent);
  color: var(--bg-primary);
  font-size: 0.7rem;
  font-weight: 600;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.cart-badge.bounce {
  transform: scale(1.3);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  width: 100%;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem;
  display: none;
  flex-direction: column;
  gap: 1.5rem;
  z-index: calc(var(--z-nav) - 1);
  transform: translateY(-100%);
  transition: transform var(--transition-normal);
}

.mobile-menu.active {
  transform: translateY(0);
}

/* ==========================================================================
   Modals & Drawers
   ========================================================================== */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal);
}

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

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -45%);
  width: 90%;
  max-width: 400px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  z-index: calc(var(--z-modal) + 1);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal.active {
  transform: translate(-50%, -50%);
  opacity: 1;
  visibility: visible;
}

.drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 400px;
  height: 100%;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border);
  z-index: calc(var(--z-modal) + 1);
  transition: right var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.drawer.active {
  right: 0;
}

.drawer-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.drawer-body {
  padding: 1.5rem;
  flex: 1;
  overflow-y: auto;
}

.drawer-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--border);
  background-color: var(--bg-tertiary);
}

.close-btn {
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

/* ==========================================================================
   Toasts
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.toast {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  padding: 1rem 1.5rem;
  border-radius: 4px;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  transform: translateX(120%);
  transition: transform var(--transition-normal);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.toast.show {
  transform: translateX(0);
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--error); }

/* ==========================================================================
   Animations
   ========================================================================== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  will-change: opacity, transform;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseClick {
  0% { transform: scale(1); }
  50% { transform: scale(0.95); }
  100% { transform: scale(1); }
}

@keyframes skeletonPulse {
  0% { opacity: 0.6; }
  50% { opacity: 0.3; }
  100% { opacity: 0.6; }
}

.fade-in { animation: fadeIn 0.5s ease forwards; }
.slide-up { animation: slideUp 0.5s ease forwards; }
.pulse-anim { animation: pulseClick 0.3s ease; }

.skeleton {
  background: var(--bg-tertiary);
  border-radius: 4px;
  animation: skeletonPulse 1.5s infinite ease-in-out;
}

/* Hero Slider */
.hero-slider {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
}
.hero-slide {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  opacity: 0;
  transition: opacity 1s ease-in-out;
  background-size: cover;
  background-position: center;
}
.hero-slide.active {
  opacity: 1;
}
.hero-dots {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  z-index: 2;
}
.hero-dots-container {
  display: flex; gap: 0.5rem;
}
.hero-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,0.3);
  cursor: pointer; transition: background 0.3s;
}
.hero-dot.active {
  background: var(--accent);
}
.hero-progress {
  width: 100px;
  height: 2px;
  background: rgba(255,255,255,0.2);
  border-radius: 2px;
  overflow: hidden;
}
.hero-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.1s linear;
}

/* Product Detail Page (PDP) */
.pdp-container {
  padding: 120px 0 60px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}
.pdp-gallery img {
  width: 100%;
  border-radius: 8px;
  object-fit: cover;
}
.pdp-thumbnails {
  display: flex; gap: 1rem; margin-top: 1rem;
}
.pdp-thumbnails img {
  width: 80px; height: 80px; border-radius: 4px; cursor: pointer; opacity: 0.6; transition: opacity 0.3s;
}
.pdp-thumbnails img:hover, .pdp-thumbnails img.active {
  opacity: 1; border: 2px solid var(--accent);
}
.variant-btn {
  padding: 0.5rem 1rem; border: 1px solid var(--border); background: transparent; color: var(--text-primary); border-radius: 4px; cursor: pointer; transition: all 0.2s;
}
.variant-btn.active {
  border-color: var(--accent); color: var(--accent); background: rgba(212, 168, 83, 0.1);
}
.review-card {
  padding: 1.5rem; background: var(--bg-secondary); border-radius: 8px; margin-bottom: 1rem; border: 1px solid var(--border);
}

/* Fly To Cart Animation */
.fly-clone {
  position: fixed;
  z-index: 9999;
  border-radius: 8px;
  pointer-events: none;
  opacity: 0.8;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1), top 0.8s cubic-bezier(0.5, 0, 0.75, 0), left 0.8s linear, width 0.8s linear, height 0.8s linear, opacity 0.8s ease-in;
}

@keyframes shakeCart {
  0% { transform: translateX(0); }
  25% { transform: translateX(-5px) rotate(-5deg); }
  50% { transform: translateX(5px) rotate(5deg); }
  75% { transform: translateX(-5px) rotate(-5deg); }
  100% { transform: translateX(0); }
}
.shake-anim {
  animation: shakeCart 0.4s ease-in-out;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .grid-cols-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .grid-cols-3, .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .pdp-container { grid-template-columns: 1fr; gap: 2rem; }
  .nav-links, .nav-search { display: none !important; }
  .mobile-menu-btn { display: block !important; }
  :root { --container-padding: 1rem; }
}

@media (max-width: 480px) {
  .grid-cols-2 { grid-template-columns: 1fr; }
}