/* ============================================
   IngrediList - Liquid Glass Styling System
   ============================================ */

@import url('theme.css');
@import url('typography.css');

/* CSS Variables - Design Tokens */
:root {
  /* Colors */
  --color-background: #F7F8FA;
  --color-accent: #4E8BFF;
  --color-accent-light: #9BC2FF;
  --color-text: #1C1C1E;
  --color-subtext: #6E6E73;
  --color-divider: rgba(0, 0, 0, 0.1);
  --color-glass-bg: rgba(255, 255, 255, 0.7);
  --color-glass-border: rgba(255, 255, 255, 0.9);
  
  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", "Segoe UI", sans-serif;
  --font-size-h1: 64px;
  --font-size-h2: 40px;
  --font-size-h3: 28px;
  --font-size-body: 18px;
  --font-size-small: 16px;
  --font-weight-bold: 700;
  --font-weight-semibold: 600;
  --font-weight-medium: 500;
  --font-weight-normal: 400;
  --line-height-tight: 1.2;
  --line-height-normal: 1.4;
  --line-height-relaxed: 1.6;
  
  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 64px;
  --spacing-2xl: 96px;
  
  /* Effects */
  --blur-amount: 18px;
  --border-radius: 24px;
  --border-radius-sm: 16px;
  --shadow-glass: 0 6px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.12);
  --transition-smooth: all 0.25s ease;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #000000;
    --color-text: #F5F5F7;
    --color-subtext: #A1A1A6;
    --color-glass-bg: rgba(28, 28, 30, 0.7);
    --color-glass-border: rgba(58, 58, 60, 0.9);
    --color-divider: rgba(255, 255, 255, 0.1);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  background: linear-gradient(180deg, var(--color-background) 0%, rgba(158, 194, 255, 0.05) 100%);
  min-height: 100vh;
  letter-spacing: -0.01em;
}

/* Enhanced text contrast on all surfaces */
p, li, span, .hero-subtitle {
  color: var(--text-primary-light);
}

@media (prefers-color-scheme: dark) {
  p, li, span, .hero-subtitle {
    color: var(--text-primary-dark);
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: -0.01em;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-semibold);
}

h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-medium);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
  line-height: var(--line-height-relaxed);
}

.hero p,
.section p {
  color: var(--text-primary-light);
  font-weight: var(--font-weight-normal);
}

@media (prefers-color-scheme: dark) {
  .hero p,
  .section p {
    color: var(--text-primary-dark);
  }
}

.section-subtitle {
  color: var(--text-secondary-light);
  font-weight: 600;
}

@media (prefers-color-scheme: dark) {
  .section-subtitle {
    color: var(--text-secondary-dark);
  }
}

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

a:hover {
  color: var(--color-accent-light);
}

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

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  background: var(--color-glass-bg);
  border-bottom: 1px solid var(--color-divider);
  padding: var(--spacing-sm) 0;
  transition: var(--transition-smooth);
}

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

.nav-logo {
  font-size: 22px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-logo svg {
  width: 28px;
  height: 28px;
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.nav-links a {
  color: var(--color-text);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 12px;
  transition: var(--transition-smooth);
}

.nav-links a:hover {
  background: rgba(78, 139, 255, 0.1);
  color: var(--color-accent);
}

/* Glass Card System with Enhanced Contrast */
.glass-card {
  background: var(--surface-glass-light);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border-radius: var(--border-radius);
  border: 1px solid var(--color-glass-border);
  box-shadow: var(--shadow-glass);
  padding: var(--spacing-lg);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

/* Overlay for text readability on glass */
.glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--glass-overlay-light);
  z-index: 0;
  pointer-events: none;
  opacity: 1;
}

.glass-card > * {
  position: relative;
  z-index: 1;
}

@media (prefers-color-scheme: dark) {
  .glass-card {
    background: var(--surface-glass-dark);
  }
  .glass-card::before {
    background: var(--glass-overlay-dark);
  }
}

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

.glass-card-sm {
  padding: var(--spacing-md);
  border-radius: var(--border-radius-sm);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 14px 32px;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
  box-shadow: 0 4px 16px rgba(78, 139, 255, 0.3);
}

.btn-primary:hover {
  background: #3a7aef;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(78, 139, 255, 0.4);
}

.btn-secondary {
  background: var(--color-glass-bg);
  color: var(--color-text);
  border: 1px solid var(--color-divider);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
  border-color: var(--color-accent);
}

/* Hero Section */
.hero {
  padding: calc(var(--spacing-2xl) + 60px) 0 var(--spacing-2xl);
  text-align: center;
  position: relative;
  overflow: hidden;
  min-height: 600px;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(78, 139, 255, 0.15) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* Hero with Video */
.hero-with-video {
  padding: 60px 0 120px;
  min-height: 90vh;
}

.hero-video-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
}

.hero-video-fallback {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(247, 248, 250, 0.97) 0%, rgba(255, 255, 255, 0.99) 100%);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  z-index: 1;
}

@media (prefers-color-scheme: dark) {
  .hero-video-overlay {
    background: linear-gradient(180deg, rgba(18, 18, 18, 0.95) 0%, rgba(28, 28, 30, 0.98) 100%);
  }
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: clamp(40px, 8vw, var(--font-size-h1));
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(18px, 3vw, 22px);
  color: var(--color-subtext);
  max-width: 700px;
  margin: 0 auto var(--spacing-lg);
  line-height: var(--line-height-relaxed);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  padding: var(--spacing-xl) 0;
}

.feature-card {
  text-align: center;
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  border-radius: 16px;
  box-shadow: 0 4px 16px rgba(78, 139, 255, 0.2);
}

.feature-icon svg {
  width: 32px;
  height: 32px;
  color: white;
}

.feature-card h3 {
  font-size: 24px;
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  color: var(--text-secondary-light);
  font-size: clamp(14px, 1.1vw + 12px, 16px);
  line-height: 1.7;
  font-weight: 400;
}

@media (prefers-color-scheme: dark) {
  .feature-card p {
    color: var(--text-secondary-dark);
  }
}

/* Steps Section */
.steps {
  padding: var(--spacing-xl) 0;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.step {
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  color: white;
  border-radius: 50%;
  font-size: 24px;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  box-shadow: 0 4px 16px rgba(78, 139, 255, 0.3);
}

.step h3 {
  font-size: 20px;
  margin-bottom: var(--spacing-xs);
}

.step p {
  color: var(--text-secondary-light);
  font-size: var(--font-size-small);
}

@media (prefers-color-scheme: dark) {
  .step p {
    color: var(--text-secondary-dark);
  }
}

/* Privacy Banner */
.privacy-banner {
  background: linear-gradient(135deg, rgba(78, 139, 255, 0.1) 0%, rgba(155, 194, 255, 0.05) 100%);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  text-align: center;
  margin: var(--spacing-xl) 0;
  border: 1px solid var(--color-divider);
}

.privacy-banner h3 {
  margin-bottom: var(--spacing-sm);
}

.privacy-banner p {
  color: var(--text-primary-light);
  max-width: 600px;
  margin: 0 auto var(--spacing-md);
}

@media (prefers-color-scheme: dark) {
  .privacy-banner p {
    color: var(--text-primary-dark);
  }
}

/* CTA Banner */
.cta-banner {
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  background: var(--color-glass-bg);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  text-align: center;
  margin: var(--spacing-xl) 0;
  border: 1px solid var(--color-glass-border);
  box-shadow: var(--shadow-glass);
}

/* Footer */
.footer {
  background: var(--color-glass-bg);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border-top: 1px solid var(--color-divider);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-2xl);
  text-align: center;
}

.footer-content {
  color: var(--color-subtext);
  font-size: var(--font-size-small);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.footer-content a {
  color: var(--color-subtext);
  transition: var(--transition-smooth);
}

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

.footer-divider {
  color: var(--color-divider);
}

/* FAQ Section */
.faq-item {
  background: var(--color-glass-bg);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  border: 1px solid var(--color-glass-border);
}

.faq-item h3 {
  font-size: 20px;
  margin-bottom: var(--spacing-xs);
  color: var(--color-accent);
}

.faq-item p {
  color: var(--text-primary-light);
  margin-bottom: 0;
}

@media (prefers-color-scheme: dark) {
  .faq-item p {
    color: var(--text-primary-dark);
  }
}

/* Section Utilities */
.section {
  padding: var(--spacing-xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-subtitle {
  text-align: center;
  color: var(--color-subtext);
  max-width: 700px;
  margin: 0 auto var(--spacing-lg);
  font-size: 20px;
}

/* Asset Grid */
.asset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.asset-card {
  background: var(--color-glass-bg);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-md);
  border: 1px solid var(--color-glass-border);
  text-align: center;
  transition: var(--transition-smooth);
}

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

.asset-card h4 {
  font-size: 18px;
  margin-bottom: var(--spacing-xs);
}

.asset-card p {
  font-size: 14px;
  color: var(--color-subtext);
  margin-bottom: var(--spacing-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --font-size-h1: 40px;
    --font-size-h2: 32px;
    --font-size-h3: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
  }
  
  .nav-links {
    display: none;
  }
  
  .hero {
    padding: calc(var(--spacing-xl) + 60px) 0 var(--spacing-lg);
    min-height: 500px;
  }
  
  .hero-with-video {
    min-height: 100vh;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }
  
  .btn {
    width: 100%;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .steps-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
}

/* Accessibility */
@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;
  }
}

/* Skip to Main Content Link (Hidden until focused) */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-accent);
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  font-weight: 600;
  z-index: 10000;
  border-radius: 4px;
}

.skip-link:focus {
  top: 0;
}

/* Focus Styles - Enhanced for Accessibility */
*:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 4px;
  box-shadow: 0 0 0 2px var(--color-focus-ring);
}

/* Button Focus */
.btn:focus-visible {
  outline: 3px solid white;
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--color-focus-ring);
}

/* Link Focus */
a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* App Badge Styles */
.app-badges {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  flex-wrap: wrap;
}

.app-badge {
  height: 48px;
  transition: var(--transition-smooth);
}

.app-badge:hover {
  transform: scale(1.05);
}