/*!
 * IngredientWhiz - Modern Food Safety App Styles
 * Version: 1.0.0
 * Date: July 24, 2025
 * Copyright: © 2025 IngredientWhiz. All rights reserved.
 * 
 * This stylesheet contains all custom styles for the IngredientWhiz web application.
 * Organized into logical sections for maintainability and performance.
 * Based on the Harmonic Peace design system.
 */

/* ================================================================= */
/* TABLE OF CONTENTS */
/* ================================================================= */
/*
 * 1. CSS VARIABLES & ROOT CONFIGURATION
 * 2. MOBILE & iOS OPTIMIZATIONS
 * 3. GLOBAL STYLES & RESETS
 * 4. TYPOGRAPHY SYSTEM
 * 5. LAYOUT UTILITIES
 * 6. COMPONENT STYLES
 *    - Header & Navigation
 *    - Footer
 *    - Buttons & Form Elements
 *    - Cards & Content Blocks
 *    - Hero Sections
 *    - Scanner Interface
 *    - Results Display
 * 7. ANIMATIONS & INTERACTIONS
 * 8. RESPONSIVE DESIGN
 * 9. PERFORMANCE OPTIMIZATIONS
 */

/* ================================================================= */
/* 1. CSS VARIABLES & ROOT CONFIGURATION */
/* ================================================================= */

:root {
  /* Viewport height workaround for iOS Safari address bar */
  --vh: 1vh;
  
  /* Safe area insets for iPhone notch/dynamic island */
  --safe-area-top: env(safe-area-inset-top);
  --safe-area-bottom: env(safe-area-inset-bottom);
  --safe-area-left: env(safe-area-inset-left);
  --safe-area-right: env(safe-area-inset-right);

  /* Modern Color Palette - IngredientWhiz Brand */
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --primary-dark: #2563eb;
  --primary-darker: #1d4ed8;
  --primary-25: #f0f9ff;
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;
  --primary-950: #172554;

  /* Accent Colors */
  --secondary: #8b5cf6;
  --secondary-light: #a78bfa;
  --secondary-dark: #7c3aed;
  
  --accent: #10b981;
  --accent-light: #34d399;
  --accent-dark: #059669;
  --accent-300: #6ee7b7;

  /* Safety Score Colors */
  --success: #10b981;
  --success-light: #34d399;
  --success-dark: #059669;
  --success-50: #ecfdf5;
  --success-100: #d1fae5;
  --success-500: #10b981;
  --success-700: #047857;

  --warning: #f59e0b;
  --warning-light: #fbbf24;
  --warning-dark: #d97706;
  --warning-50: #fffbeb;
  --warning-100: #fef3c7;
  --warning-500: #f59e0b;
  --warning-700: #b45309;

  --error: #ef4444;
  --error-light: #f87171;
  --error-dark: #dc2626;
  --error-darker: #b91c1c;
  --error-50: #fef2f2;
  --error-100: #fee2e2;
  --error-200: #fecaca;
  --error-300: #fca5a5;
  --error-400: #f87171;
  --error-500: #ef4444;
  --error-600: #dc2626;
  --error-700: #b91c1c;
  --error-800: #991b1b;
  --error-900: #7f1d1d;
  --error-950: #450a0a;

  /* Neutral Colors */
  --gray-25: #fcfcfd;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --gray-950: #030712;

  --white: #ffffff;
  --black: #000000;

  /* Typography - Plus Jakarta Sans for headings, Inter for body */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
  --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Fira Code', 'Courier New', monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Border Radius */
  --radius-sm: 0.125rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 0.15s;
  --transition-normal: 0.3s;
  --transition-slow: 0.5s;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-700) 100%);
  --gradient-success: linear-gradient(135deg, var(--success-500) 0%, var(--success-700) 100%);
  --gradient-warning: linear-gradient(135deg, var(--warning-500) 0%, var(--warning-700) 100%);
  --gradient-error: linear-gradient(135deg, var(--error-500) 0%, var(--error-700) 100%);
}

/* iOS Safari viewport height fix */
@supports (-webkit-touch-callout: none) {
  :root {
    --vh: calc(var(--vh, 1vh));
  }
}

/* ================================================================= */
/* 2. MOBILE & iOS OPTIMIZATIONS */
/* ================================================================= */

/* Prevent overscroll rubber banding */
html, body {
  overscroll-behavior: none;
  -webkit-overflow-scrolling: touch;
  position: relative;
}

/* Optimize animations for mobile */
@media (prefers-reduced-motion: no-preference) and (max-width: 768px) {
  * {
    animation-duration: 0.3s !important;
    transition-duration: 0.2s !important;
  }
}

/* Disable animations on low-power devices */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* GPU acceleration for common transforms */
.hero-badge,
.btn-primary,
.btn-secondary,
.stat-card,
.feature-card,
.hero-card {
  will-change: transform;
  transform: translate3d(0, 0, 0);
  backface-visibility: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Mobile-optimized transforms */
@media (hover: none) and (pointer: coarse) {
  .btn-primary:hover,
  .btn-secondary:hover,
  .stat-card:hover,
  .feature-card:hover {
    transform: translate3d(0, -2px, 0) !important;
  }
  
  .feature-card:hover,
  .stat-card:hover {
    transform: translate3d(0, -3px, 0) !important;
  }
  
  .header {
    backdrop-filter: blur(8px) !important;
    -webkit-backdrop-filter: blur(8px) !important;
  }
  
  .feature-card {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08) !important;
  }
  
  .header {
    position: fixed !important;
    top: var(--safe-area-top, 0) !important;
    left: 0;
    right: 0;
    padding-top: var(--safe-area-top, 0);
  }
  
  body {
    padding-top: calc(70px + var(--safe-area-top, 0));
  }
}

/* ================================================================= */
/* 3. GLOBAL STYLES & RESETS */
/* ================================================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--gray-700);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.2;
}

p {
  margin: 0 0 1rem 0;
}

a {
  color: var(--primary-600);
  text-decoration: none;
  transition: color var(--transition-fast) ease;
}

a:hover {
  color: var(--primary-700);
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: 100%;
  line-height: 1.15;
  margin: 0;
}

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

/* Remove focus outline for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* Custom focus styles for keyboard users */
:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* ================================================================= */
/* 4. TYPOGRAPHY SYSTEM */
/* ================================================================= */

.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }
.text-5xl { font-size: var(--text-5xl); }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Color utilities */
.text-gray-400 { color: var(--gray-400); }
.text-gray-500 { color: var(--gray-500); }
.text-gray-600 { color: var(--gray-600); }
.text-gray-700 { color: var(--gray-700); }
.text-gray-800 { color: var(--gray-800); }
.text-gray-900 { color: var(--gray-900); }
.text-white { color: var(--white); }
.text-primary-600 { color: var(--primary-600); }
.text-primary-700 { color: var(--primary-700); }

/* ================================================================= */
/* 5. LAYOUT UTILITIES */
/* ================================================================= */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-8);
  }
}

/* Flexbox utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }

/* Grid utilities */
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.gap-12 { gap: var(--space-12); }

/* Spacing utilities */
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mx-auto { margin-left: auto; margin-right: auto; }

.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }
.py-12 { padding-top: var(--space-12); padding-bottom: var(--space-12); }
.py-16 { padding-top: var(--space-16); padding-bottom: var(--space-16); }

/* Width and height utilities */
.w-full { width: 100%; }
.w-16 { width: 4rem; }
.h-16 { height: 4rem; }
.max-w-md { max-width: 28rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }

/* Background utilities */
.bg-white { background-color: var(--white); }
.bg-gray-50 { background-color: var(--gray-50); }
.bg-gray-100 { background-color: var(--gray-100); }
.bg-gray-900 { background-color: var(--gray-900); }
.bg-primary-100 { background-color: var(--primary-100); }
.bg-primary-700 { background-color: var(--primary-700); }

/* Border utilities */
.border { border: 1px solid var(--gray-200); }
.border-gray-200 { border-color: var(--gray-200); }
.border-t { border-top: 1px solid var(--gray-200); }
.border-gray-800 { border-color: var(--gray-800); }

/* Border radius utilities */
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-3xl { border-radius: var(--radius-3xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow utilities */
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* Display utilities */
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.inline-flex { display: inline-flex; }

/* Position utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }

/* Overflow utilities */
.overflow-hidden { overflow: hidden; }

/* ================================================================= */
/* 6. COMPONENT STYLES */
/* ================================================================= */

/* Header Styles - Modern Glass Effect */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.1);
  padding: var(--space-4) var(--space-8);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all var(--transition-normal) ease;
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--gray-900);
  text-decoration: none;
  letter-spacing: -0.03em;
  transition: transform var(--transition-fast) ease;
  gap: var(--space-3);
}

.logo:hover {
  transform: scale(1.02);
  color: var(--gray-900);
}

.logo-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-weight: 500;
  color: var(--gray-700);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast) ease;
  font-size: var(--text-sm);
}

.nav-link:hover {
  color: var(--primary-600);
  background: var(--primary-50);
  transform: translateY(-1px);
}

.start-scanner-btn {
  background: var(--gradient-primary) !important;
  color: var(--white) !important;
  font-weight: 600;
  box-shadow: var(--shadow-md);
}

.start-scanner-btn:hover {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-800)) !important;
  color: var(--white) !important;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
  .header {
    padding: var(--space-3) var(--space-4);
  }
  
  .nav {
    gap: var(--space-3);
  }
  
  .nav-link {
    padding: var(--space-2);
    font-size: var(--text-xs);
  }
  
  .nav-link span {
    display: none;
  }
  
  .logo {
    font-size: var(--text-lg);
  }
}

/* Footer Styles - Modern Dark Design */
.footer {
  background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-950) 100%);
  color: var(--white);
  padding: var(--space-16) 0 var(--space-8);
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-500), transparent);
  opacity: 0.6;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: var(--space-8);
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.footer-logo-section {
  grid-column: 1;
}

.footer-logo {
  margin-bottom: var(--space-6);
}

.footer-logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  transition: transform var(--transition-fast) ease;
}

.footer-logo-link:hover {
  transform: scale(1.02);
}

.footer-logo-img {
  width: 24px;
  height: 24px;
  object-fit: contain;
  flex-shrink: 0;
}

.footer-brand {
  display: flex;
  flex-direction: column;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
}

.footer-brand-tagline {
  font-size: var(--text-sm);
  color: var(--gray-400);
  font-weight: 500;
  margin-top: var(--space-1);
}

.footer-section {
  display: flex;
  flex-direction: column;
}

.footer-section h3 {
  color: var(--white);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.footer-link {
  color: var(--gray-400);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-2) 0;
  transition: all var(--transition-fast) ease;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-1);
}

.footer-link:hover {
  color: var(--white);
  padding-left: var(--space-3);
  background: rgba(255, 255, 255, 0.05);
}

.footer-bottom {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--gray-800);
  text-align: center;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}

.footer-bottom p {
  color: var(--gray-400);
  font-size: var(--text-sm);
  line-height: 1.6;
  margin: 0;
}

.footer-bottom a {
  color: var(--primary-400);
  text-decoration: none;
  transition: color var(--transition-fast) ease;
}

.footer-bottom a:hover {
  color: var(--primary-300);
}

@media (max-width: 1024px) {
  .footer-content {
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-6);
  }
  
  .footer-logo-section {
    grid-column: 1 / -1;
    margin-bottom: var(--space-4);
  }
}

@media (max-width: 768px) {
  .footer {
    padding: var(--space-12) 0 var(--space-6);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    padding: 0 var(--space-4);
  }
  
  .footer-logo-section {
    grid-column: 1;
    text-align: center;
  }
  
  .footer-section {
    text-align: center;
  }
  
  .footer-link:hover {
    padding-left: 0;
    background: rgba(255, 255, 255, 0.1);
    padding: var(--space-2) var(--space-4);
  }
  
  .footer-bottom {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
  
  .footer-bottom p {
    font-size: var(--text-xs);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-display);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal) ease;
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow) ease;
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-lg);
  color: var(--white);
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:active {
  transform: translateY(0) scale(1);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--white);
  color: var(--primary-700);
  border: 2px solid var(--primary-200);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--primary-50);
  border-color: var(--primary-300);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--white);
  color: var(--primary-600);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  text-decoration: none;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal) ease;
}

.btn-cta:hover {
  background: var(--gray-50);
  color: var(--primary-800);
  transform: scale(1.05);
}

/* Hero Section */
.hero {
  padding: 8rem 0 4rem;
  background: linear-gradient(135deg, var(--white) 0%, var(--primary-25) 50%, var(--gray-50) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -30%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, var(--primary-100) 0%, var(--primary-50) 40%, transparent 70%);
  opacity: 0.4;
  pointer-events: none;
  animation: float 8s ease-in-out infinite;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
  color: var(--primary-700);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--text-sm);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.15);
  border: 1px solid var(--primary-200);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
  color: var(--gray-900);
}

.hero-highlight {
  display: block;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-top: var(--space-2);
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--gray-600);
  font-size: var(--text-sm);
  font-weight: 500;
}

.trust-item svg {
  color: var(--success-500);
}

/* Ingredient Input Section */
.ingredient-input-section {
  background: var(--white);
  border-top: 1px solid var(--gray-100);
}

/* Alternative Input */
.alternative-input {
  background: var(--gray-50);
  padding: var(--space-8);
  border-radius: var(--radius-2xl);
  transition: all var(--transition-fast) ease;
  border: 1px solid transparent;
}

.alternative-input:hover {
  border-color: var(--gray-200);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.ingredients-textarea {
  width: 100%;
  padding: var(--space-4);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  resize: none;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.5;
  transition: border-color var(--transition-fast) ease;
}

.ingredients-textarea:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.ingredients-textarea::placeholder {
  color: var(--gray-400);
}

/* Hero Card */
.hero-card {
  background: var(--white);
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8);
  border: 1px solid var(--gray-200);
  position: relative;
  animation: floatCard 6s ease-in-out infinite;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-3xl);
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition-normal) ease;
}

.hero-card:hover::before {
  opacity: 1;
}

.hero-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2xl);
}

.card-header h3 {
  font-family: var(--font-display);
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.estimate-badge {
  display: inline-block;
  background: var(--warning-100);
  color: var(--warning-700);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

/* Ingredient Display Components */
.ingredient-breakdown {
  margin-bottom: var(--space-6);
}

.ingredient-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  transition: background-color var(--transition-fast) ease;
}

.ingredient-item:hover {
  background: var(--gray-25);
}

.ingredient-name {
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-1);
}

.risk-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-1);
}

.risk-badge {
  display: inline-block;
  font-size: 0.625rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.risk-safe {
  background: var(--success-100);
  color: var(--success-700);
}

.risk-msg {
  background: var(--warning-100);
  color: var(--warning-700);
}

.risk-banned {
  background: var(--error-100);
  color: var(--error-700);
}

.risk-artificial {
  background: var(--gray-100);
  color: var(--gray-700);
}

.safety-score {
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.safety-safe {
  background: var(--success-100);
  color: var(--success-700);
}

.safety-caution {
  background: var(--warning-100);
  color: var(--warning-700);
}

.safety-avoid {
  background: var(--error-100);
  color: var(--error-700);
}

.dietary-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.diet-badge {
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.diet-vegan {
  background: var(--success-100);
  color: var(--success-700);
}

.diet-halal {
  background: var(--primary-100);
  color: var(--primary-700);
}

.diet-kosher {
  background: var(--error-100);
  color: var(--error-700);
}

/* Scanner Interface */
.scanner-section {
  padding: var(--space-16) 0;
  background: var(--gray-50);
}

.scanner-container {
  background: var(--white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-6);
  max-width: 500px;
  margin: 0 auto;
}

.scanner-viewport {
  width: 100%;
  min-height: 300px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--gray-900);
  position: relative;
}

.scanner-viewport video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.scanner-controls {
  text-align: center;
  margin-top: var(--space-4);
}

/* Results Display */
.results-section {
  padding: var(--space-16) 0;
}

.results-card {
  background: var(--white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
}

.product-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.product-image {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin: 0 auto var(--space-4);
  box-shadow: var(--shadow-md);
}

.product-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.product-brand {
  color: var(--gray-600);
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
}

.overall-score {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

/* Section Headers */
.section-badge {
  display: inline-block;
  background: var(--primary-100);
  color: var(--primary-700);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

/* Feature Cards */
.feature-card {
  background: var(--white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-6);
  text-align: center;
  transition: all var(--transition-normal) ease;
  border: 1px solid var(--gray-100);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-200);
}

.feature-icon {
  width: 4rem;
  height: 4rem;
  margin: 0 auto var(--space-4);
  background: var(--primary-100);
  color: var(--primary-600);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.feature-card p {
  color: var(--gray-600);
  font-size: var(--text-sm);
  line-height: 1.6;
  margin: 0;
}

/* Stats Section */
.stats {
  background: var(--primary-700);
  color: var(--white);
  padding: var(--space-16) 0;
}

.stat-card {
  text-align: center;
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal) ease;
  cursor: pointer;
}

.stat-card:hover {
  background: var(--primary-600);
  transform: scale(1.05);
}

.stat-number {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 800;
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--text-base);
  font-weight: 600;
  opacity: 0.9;
}

/* FAQ Section */
.faq-item {
  background: var(--white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: all var(--transition-normal) ease;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--space-6);
  text-align: left;
  background: none;
  border: none;
  color: var(--gray-900);
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition-fast) ease;
}

.faq-question:hover {
  background: var(--gray-50);
}

.faq-icon {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--gray-400);
  transition: transform var(--transition-normal) ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow) ease;
}

.faq-answer.open {
  max-height: 200px;
}

.faq-answer .content {
  padding: 0 var(--space-6) var(--space-6);
  color: var(--gray-600);
  line-height: 1.7;
}

/* Floating CTA */
.floating-cta {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 1000;
  background: var(--gradient-primary);
  color: var(--white);
  border: none;
  border-radius: var(--radius-full);
  padding: var(--space-4);
  box-shadow: var(--shadow-xl);
  font-weight: 600;
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: all var(--transition-normal) ease;
}

.floating-cta:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-2xl);
}

@media (min-width: 768px) {
  .floating-cta {
    display: none;
  }
}

/* ================================================================= */
/* 7. ANIMATIONS & INTERACTIONS */
/* ================================================================= */

@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(2deg);
  }
}

@keyframes floatCard {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

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

.fade-in {
  opacity: 0;
  animation: fadeInUp 0.6s ease-out forwards;
}

/* ================================================================= */
/* 8. RESPONSIVE DESIGN */
/* ================================================================= */

@media (max-width: 1023px) {
  .grid-cols-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
  
  .flex-row {
    flex-direction: column;
  }
  
  .text-center {
    text-align: center;
  }
  
  .hero {
    padding: 6rem 0 3rem;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .container {
    padding: 0 var(--space-4);
  }
  
  .feature-card,
  .faq-item {
    margin-bottom: var(--space-4);
  }
  
  .stat-card {
    padding: var(--space-4);
  }
  
  .stat-number {
    font-size: var(--text-3xl);
  }
  
  .hero-card {
    margin-top: var(--space-8);
  }
  
  .alternative-input {
    padding: var(--space-6);
  }
  
  .ingredient-input-section {
    padding: var(--space-8) 0;
  }
}

@media (max-width: 479px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .section-header h2 {
    font-size: 1.875rem;
  }
  
  .btn-lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
  }
  
  .hero-card {
    padding: var(--space-6);
  }
  
  .faq-question {
    padding: var(--space-4);
    font-size: var(--text-base);
  }
  
  .faq-answer .content {
    padding: 0 var(--space-4) var(--space-4);
  }
}

/* ================================================================= */
/* 9. PERFORMANCE OPTIMIZATIONS */
/* ================================================================= */

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  .hero::before,
  .hero-card,
  .feature-card,
  .stat-card,
  .floating-cta {
    animation: none !important;
  }
  
  .btn-primary:hover,
  .btn-secondary:hover,
  .feature-card:hover,
  .stat-card:hover,
  .hero-card:hover {
    transform: none !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .hero-badge,
  .section-badge,
  .estimate-badge {
    border: 2px solid currentColor;
  }
  
  .btn-primary,
  .btn-secondary {
    border: 2px solid currentColor;
  }
  
  .feature-card,
  .faq-item,
  .hero-card {
    border: 2px solid var(--gray-300);
  }
}


/* Print styles */
@media print {
  .header,
  .floating-cta,
  .scanner-section {
    display: none !important;
  }
  
  .hero {
    background: none !important;
    padding: var(--space-8) 0 !important;
  }
  
  .hero::before {
    display: none !important;
  }
  
  * {
    animation: none !important;
    transition: none !important;
    box-shadow: none !important;
  }
}