/* FileLens Landing Page - Base Styles */

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

/* Brand Colors from FileLens App */
:root {
  /* Primary Forest Green */
  --primary: #006D3B;
  --primary-light: #80D99B;
  --primary-container: #9CF6B5;
  --primary-dark: #00522B;

  /* Backgrounds */
  --bg-light: #FBFDF8;
  --bg-dark: #191C19;
  --surface-light: #FBFDF8;
  --surface-dark: #191C19;
  --surface-variant-light: #DDE5DB;
  --surface-variant-dark: #414942;

  /* Text */
  --text-light: #191C19;
  --text-dark: #E1E3DE;
  --text-secondary-light: #717971;
  --text-secondary-dark: #C1C9BF;

  /* Source Accent Colors */
  --camera: #2196F3;
  --whatsapp: #25D366;
  --screenshots: #FF9800;
  --downloads: #9C27B0;
  --custom: #607D8B;

  /* Tertiary */
  --tertiary: #3A656F;
  --tertiary-light: #A2CEDA;
  --tertiary-container: #BDEAF6;

  /* Error */
  --error: #BA1A1A;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Container */
  --container-max: 1200px;
  --container-padding: 24px;

  /* Current theme colors (default: light) */
  --bg: var(--bg-light);
  --text: var(--text-light);
  --text-secondary: var(--text-secondary-light);
  --surface: var(--surface-light);
  --surface-variant: var(--surface-variant-light);
}

/* Dark mode */
[data-theme="dark"] {
  --bg: var(--bg-dark);
  --text: var(--text-dark);
  --text-secondary: var(--text-secondary-dark);
  --surface: var(--surface-dark);
  --surface-variant: var(--surface-variant-dark);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  [data-theme="system"] {
    --bg: var(--bg-dark);
    --text: var(--text-dark);
    --text-secondary: var(--text-secondary-dark);
    --surface: var(--surface-dark);
    --surface-variant: var(--surface-variant-dark);
    color-scheme: dark;
  }
}

/* Base styles */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  color: var(--text-secondary);
}

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

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

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
}

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

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

.btn-secondary {
  background: var(--surface-variant);
  color: var(--text);
}

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

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

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

/* Chips */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  background: var(--surface-variant);
  color: var(--text);
  transition: all var(--transition-fast);
}

.chip.active {
  background: var(--primary-container);
  color: var(--primary-dark);
}

/* Cards */
.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

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

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  background: var(--primary-container);
  color: var(--primary-dark);
}

/* Section base styles */
section {
  padding: var(--space-4xl) 0;
}

/* Utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.grid { display: grid; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

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

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease forwards;
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

/* Scroll animations (triggered by JS) */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
    --space-4xl: 64px;
  }

  section {
    padding: var(--space-3xl) 0;
  }
}