/* Modern CSS Reset & Variables */
:root {
  /* Color Palette - Premium & Clean */
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #666666;
  --color-primary: #007AFF; /* Apple-like Blue */
  --color-primary-hover: #0056b3;
  --color-surface: #f5f5f7;
  --color-border: #e1e1e1;
  
  /* Spacing */
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 48px;
  --space-xxl: 80px;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 8px rgba(0,0,0,0.08);
  --radius-md: 12px;
  --radius-lg: 20px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #000000;
    --color-text: #f5f5f7;
    --color-text-secondary: #a1a1a6;
    --color-primary: #0A84FF;
    --color-primary-hover: #409CFF;
    --color-surface: #1c1c1e;
    --color-border: #333333;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.3);
  }
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  text-decoration: underline;
}

/* Layout */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

header {
  padding: var(--space-xl) 0;
  text-align: center;
}

/* Typography Components */
h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

/* Cards */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

.app-card {
  background: var(--color-surface);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border: 1px solid transparent;
}

.app-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border);
}

.app-card p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

/* Buttons */
.btn-group {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-primary);
  color: #fff;
  border-radius: 20px; 
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn:hover {
  background-color: var(--color-primary-hover);
  text-decoration: none;
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

/* Contact Section */
.contact-section {
  text-align: center;
  padding: var(--space-xl) 0;
  margin-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.contact-section p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

/* Footer */
footer {
  text-align: center;
  padding: var(--space-lg) 0;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-top: var(--space-xl);
}

/* Utilities */
.text-center { text-align: center; }
.mt-lg { margin-top: var(--space-lg); }

/* Privacy Policy Specific */
.privacy-content {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
}
.privacy-content h2 { margin-top: var(--space-lg); }
.privacy-content ul { padding-left: var(--space-lg); margin-bottom: var(--space-md); }