/* ============================================================
   NUTRITION FIRE - Official Modern DTC Sports Nutrition Stylesheet
   Designed for: Premium, Modern, Minimal, Gen-Z Athletic Brand
   Color Palette:
   - Deep Black: #08090B
   - Near Black: #0F1115
   - Card Dark: #111318
   - Border Dark: #1F2229 / #27272A
   - White: #FFFFFF
   - Off-White Background (Light): #F8F8F8
   - Cool Gray: #A1A1AA
   - Border Light: #E4E4E7
   - Electric Blue Accent (sparingly): #3B82F6
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  /* LIGHT THEME (DEFAULT) */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8F8F8;
  --bg-card: #FFFFFF;
  --bg-card-subtle: #F4F4F5;
  --border-color: #E4E4E7;
  --border-hover: #A1A1AA;
  --text-primary: #0F1115;
  --text-secondary: #52525B;
  --text-muted: #71717A;
  --accent-blue: #3B82F6;
  --accent-blue-hover: #2563EB;
  --accent-violet: #8B5CF6;
  --card-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
  --card-shadow-hover: 0 14px 30px rgba(0, 0, 0, 0.07);
  --header-bg: rgba(255, 255, 255, 0.92);
  --header-border: #E4E4E7;
}

/* DARK THEME */
html.dark, body.dark {
  --bg-primary: #08090B;
  --bg-secondary: #0F1115;
  --bg-card: #111318;
  --bg-card-subtle: #181A20;
  --border-color: #1F2229;
  --border-hover: #3F3F46;
  --text-primary: #FFFFFF;
  --text-secondary: #A1A1AA;
  --text-muted: #71717A;
  --accent-blue: #3B82F6;
  --accent-blue-hover: #60A5FA;
  --accent-violet: #8B5CF6;
  --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  --card-shadow-hover: 0 16px 36px rgba(0, 0, 0, 0.55);
  --header-bg: rgba(8, 9, 11, 0.92);
  --header-border: #1F2229;
}

/* Base resets & typography */
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Typography Hierarchy */
.font-heading {
  font-family: 'Space Grotesk', -apple-system, sans-serif;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.tracking-tight-titles {
  letter-spacing: -0.035em;
}

/* Background Canvas Layer */
#lightning-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
}

/* Content wrapper */
.site-content {
  position: relative;
  z-index: 10;
}

/* Header dynamic styling */
.header-glass {
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--header-border);
}

/* ============================================================
   BUTTONS: Clean, Tactile, High-End DTC
   ============================================================ */
.btn-primary {
  background-color: #0F1115;
  color: #FFFFFF;
  border-radius: 12px;
  font-weight: 600;
  transition: background-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary:hover {
  background-color: #18181B;
  transform: translateY(-1px);
}

.dark .btn-primary {
  background-color: #FFFFFF;
  color: #0F1115;
}

.dark .btn-primary:hover {
  background-color: #F4F4F5;
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-weight: 600;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.btn-secondary:hover {
  background-color: var(--bg-card-subtle);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.btn-accent {
  background-color: var(--accent-blue);
  color: #FFFFFF;
  border-radius: 12px;
  font-weight: 600;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.btn-accent:hover {
  background-color: var(--accent-blue-hover);
  transform: translateY(-1px);
}

.btn-whatsapp {
  background-color: #25D366;
  color: #FFFFFF;
  border-radius: 12px;
  font-weight: 600;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.btn-whatsapp:hover {
  background-color: #20BD5A;
  transform: translateY(-1px);
}

/* ============================================================
   PRODUCT CARDS: Clean E-Commerce
   ============================================================ */
.product-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  border-radius: 16px;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--card-shadow-hover);
}

.product-image-wrap {
  overflow: hidden;
  position: relative;
  border-top-left-radius: 16px;
  border-top-right-radius: 16px;
  background-color: var(--bg-card-subtle);
}

.product-image-wrap img {
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.product-card:hover .product-image-wrap img {
  transform: scale(1.04);
}

/* Category Editorial Tiles */
.category-tile {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.category-tile:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
  box-shadow: var(--card-shadow-hover);
}

.category-tile img {
  transition: transform 0.35s ease;
}

.category-tile:hover img {
  transform: scale(1.05);
}

/* Subtle Hero Float Animation */
@keyframes subtleHeroFloat {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-6px); }
}

.animate-float {
  animation: subtleHeroFloat 4s ease-in-out infinite;
}

/* Clean Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 100050;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast-item {
  pointer-events: auto;
  min-width: 280px;
  max-width: 380px;
  border-radius: 12px;
  animation: slideToastIn 0.22s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideToastIn {
  from {
    transform: translateY(12px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Minimal Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-hover);
}

/* ============================================================
   MOBILE RESPONSIVENESS OPTIMIZATIONS
   ============================================================ */
@media (max-width: 640px) {
  /* Prevent horizontal scroll on small devices */
  body, html {
    overflow-x: hidden;
    width: 100%;
  }

  /* Compact header on mobile */
  header {
    height: 64px !important;
  }

  /* Safe tap target sizes */
  button, a {
    touch-action: manipulation;
  }

  /* Category tabs horizontal scrolling */
  .category-tab-btn {
    font-size: 11px;
    padding: 6px 12px;
  }

  /* Bottom toast positioning on mobile */
  #toast-container {
    bottom: 16px;
    right: 16px;
    left: 16px;
  }
  .toast-item {
    min-width: unset;
    width: 100%;
    font-size: 12px;
  }

  /* Product card layout on mobile */
  .product-card {
    border-radius: 14px;
  }

  /* Ensure modal inputs don't auto-zoom on iOS */
  input, select, textarea {
    font-size: 16px !important;
  }
  @supports (-webkit-touch-callout: none) {
    input, select, textarea {
      font-size: 16px !important;
    }
  }

  /* Cart drawer on mobile fills width */
  #cart-drawer {
    width: 100% !important;
    max-width: 100% !important;
  }

  /* Quick view & Checkout modal max height and smooth scroll */
  #quickview-modal > div,
  #checkout-modal > div,
  #admin-modal > div {
    max-height: 90vh;
    margin: 12px;
    border-radius: 16px;
  }
}