/*-------------------------------------*\
  CONTENTS
\*-------------------------------------*/
/*
  1. DESIGN TOKENS
    1.1 Colors
    1.2 Typography
    1.3 Spacing
    1.4 Effects
  2. RESET & BASE
  3. LAYOUT & CONTAINER
  4. COMPONENTS
    4.1 Header
    4.2 Cards
    4.3 Buttons & Links
    4.4 Footer
  5. PAGE-SPECIFIC STYLES
    5.1 Homepage
    5.2 Policy Pages
  6. UTILITIES
  7. PRINT STYLES
  8. MEDIA QUERIES
*/

/*-------------------------------------*\
  1. DESIGN TOKENS
\*-------------------------------------*/

/* 1.1 Colors */
:root {
  /* Color palette */
  --color-primary-100: #e9d5ff;
  --color-primary-200: #d8b4fe;
  --color-primary-300: #c084fc;
  --color-primary-400: #a855f7;
  --color-primary-500: #8b5cf6;
  --color-primary-600: #7c3aed;
  --color-primary-700: #6d28d9;
  --color-primary-800: #5b21b6;
  --color-primary-900: #4c1d95;
  
  --color-accent-100: #d1fae5;
  --color-accent-200: #a7f3d0;
  --color-accent-300: #6ee7b7;
  --color-accent-400: #34d399;
  --color-accent-500: #10b981;
  --color-accent-600: #059669;
  --color-accent-700: #047857;
  --color-accent-800: #065f46;
  --color-accent-900: #064e3b;
  
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Semantic colors */
  --color-primary: var(--color-primary-800);
  --color-primary-light: var(--color-primary-500);
  --color-accent: var(--color-accent-500);
  --color-dark: #1a1735;
  --color-light: #f5f3ff;
  --color-gray: var(--color-gray-500);
  --color-gray-light: #aba9bc;
  --color-gray-dark: #8e8ca0;
  --color-background: linear-gradient(135deg, #f5f3ff 0%, #ddd6fe 100%);
  --color-white: #ffffff;
  --color-black: #000000;
  
  /* Theme colors - adjustable as a set */
  --theme-primary: var(--color-primary);
  --theme-secondary: var(--color-accent);
  --theme-text: var(--color-dark);
  --theme-background: var(--color-background);
  --theme-card: var(--color-white);
  --theme-footer: var(--color-dark);
}

/* 1.2 Typography */
:root {
  /* Font sizes - follows 1.25 type scale */
  --text-xs: 0.8rem;      /* 12.8px */
  --text-sm: 0.95rem;     /* 15.2px */
  --text-base: 1rem;      /* 16px */
  --text-md: 1.2rem;      /* 19.2px */
  --text-lg: 1.5rem;      /* 24px */
  --text-xl: 1.875rem;    /* 30px */
  --text-2xl: 2.5rem;     /* 40px */
  --text-3xl: 3rem;       /* 48px */
  
  /* Font weights */
  --font-thin: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line heights */
  --line-none: 1;
  --line-tight: 1.25;
  --line-normal: 1.5;
  --line-relaxed: 1.625;
  --line-loose: 2;
  
  /* Letter spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
}

/* 1.3 Spacing */
:root {
  /* Spacing system - follows 1.5 scale */
  --space-2xs: 0.25rem;  /* 4px */
  --space-xs: 0.5rem;    /* 8px */
  --space-sm: 0.75rem;   /* 12px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2rem;      /* 32px */
  --space-2xl: 3rem;     /* 48px */
  --space-3xl: 4.5rem;   /* 72px */
  
  /* Space for margins/padding */
  --space-1: var(--space-2xs);
  --space-2: var(--space-xs);
  --space-3: var(--space-sm);
  --space-4: var(--space-md);
  --space-5: var(--space-lg);
  --space-6: var(--space-xl);
  --space-7: var(--space-2xl);
  --space-8: var(--space-3xl);
  
  /* Size constraints */
  --width-xs: 20rem;     /* 320px */
  --width-sm: 30rem;     /* 480px */
  --width-md: 48rem;     /* 768px */
  --width-lg: 64rem;     /* 1024px */
  --width-xl: 75rem;     /* 1200px */
  --width-2xl: 90rem;    /* 1440px */
  
  /* Border radius */
  --radius-sm: 0.125rem; /* 2px */
  --radius-md: 0.5rem;   /* 8px */
  --radius-lg: 1rem;     /* 16px */
  --radius-xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;
}

/* 1.4 Effects */
:root {
  /* Shadows - with alpha channel for flexibility */
  --shadow-color: 0deg 0% 0%;
  
  --shadow-sm: 
    0 1px 2px hsl(var(--shadow-color) / 0.05),
    0 1px 1px hsl(var(--shadow-color) / 0.1);
    
  --shadow-md: 
    0 4px 6px -1px hsl(var(--shadow-color) / 0.1),
    0 2px 4px -2px hsl(var(--shadow-color) / 0.1);
    
  --shadow-lg: 
    0 10px 15px -3px hsl(var(--shadow-color) / 0.1),
    0 4px 6px -4px hsl(var(--shadow-color) / 0.1);
  
  /* Transitions - prefer composable over monolithic */
  --transition-duration-fast: 150ms;
  --transition-duration-normal: 300ms;
  --transition-duration-slow: 500ms;
  --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
  
  --transition-all: all var(--transition-duration-normal) var(--transition-timing);
  --transition-transform: transform var(--transition-duration-normal) var(--transition-timing);
  --transition-opacity: opacity var(--transition-duration-normal) var(--transition-timing);
  --transition-colors: color var(--transition-duration-fast) var(--transition-timing),
                       background-color var(--transition-duration-fast) var(--transition-timing),
                       border-color var(--transition-duration-fast) var(--transition-timing);
}

/*-------------------------------------*\
  2. RESET & BASE
\*-------------------------------------*/
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Using system fonts first for optimal performance */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, 
    Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  font-size: var(--text-base);
  color: var(--theme-text);
  background: var(--theme-background);
  line-height: var(--line-normal);
  min-height: 100vh;
  text-rendering: optimizeSpeed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.5s ease;
}

img, svg, video, canvas, audio, iframe, embed, object {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

/* Remove default styles from links */
a {
  color: inherit;
  text-decoration: none;
}

/* Ensure always visible focus styles for keyboard navigation */
:focus-visible {
  outline: 3px solid var(--color-primary-300);
  outline-offset: 2px;
}

/*-------------------------------------*\
  3. LAYOUT & CONTAINER
\*-------------------------------------*/
.container {
  width: 100%;
  max-width: var(--width-xl);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.grid {
  display: grid;
  gap: var(--space-4);
}

.features-grid,
.policy-grid {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.policy-grid {
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

@media (min-width: 1024px) {
  .policy-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Stack child elements with consistent spacing */
.stack > * + * {
  margin-top: var(--space-4);
}

.stack-sm > * + * {
  margin-top: var(--space-2);
}

.stack-lg > * + * {
  margin-top: var(--space-6);
}

/* Flex patterns for layout composition */
.flex-row {
  display: flex;
  flex-direction: row;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

/*-------------------------------------*\
  4. COMPONENTS
\*-------------------------------------*/

/* 4.1 Header */
header {
  padding: var(--space-2) 0;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 100;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Music note icon styling */
.music-icon {
  width: 24px;
  height: 24px;
  color: var(--theme-primary);
  margin-right: var(--space-2);
}

.music-icon .music-path,
.music-icon .music-circle {
  stroke: currentColor;
}

/* In dark mode, adjust icon brightness */
@media (prefers-color-scheme: dark) {
  .music-icon {
    color: var(--color-primary-300);
  }
  
  .footer .music-icon {
    color: var(--color-light);
  }
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--theme-primary);
  text-decoration: none;
}

.logo span {
  margin-left: var(--space-1);
}

/* 4.2 Cards */
.card {
  background-color: var(--theme-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition-all);
  position: relative;
  overflow: hidden;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: linear-gradient(to bottom, var(--theme-primary), var(--theme-secondary));
  opacity: 0;
  transition: opacity var(--transition-duration-normal) var(--transition-timing);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

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

.feature-card {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  text-align: left;
}

.policy-card {
  padding: var(--space-4);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card-header {
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--space-3);
}

.feature-icon {
  font-size: 2.5rem;
  margin-right: var(--space-3);
  flex-shrink: 0;
  line-height: 1;
}

.badge-circle {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: var(--radius-full);
  color: var(--color-white);
  font-weight: var(--font-bold);
  box-shadow: 0 4px 8px rgba(91, 33, 182, 0.25);
  margin-right: var(--space-3);
}

.policy-number {
  width: 40px;
  height: 40px;
  min-width: 40px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  font-size: var(--text-md);
}

/* 4.3 Buttons & Links */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 2rem;
  border-radius: var(--radius-full);
  font-weight: var(--font-semibold);
  transition: var(--transition-all);
  cursor: pointer;
  border: none;
  text-decoration: none;
  text-align: center;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-700);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:active {
  transform: translateY(-1px);
}

.back-link {
  display: inline-flex;
  align-items: center;
  color: var(--color-gray);
  font-weight: var(--font-medium);
  text-decoration: none;
  transition: var(--transition-all);
  margin: var(--space-3) 0 var(--space-4);
  background: var(--color-white);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  align-self: flex-start;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.back-link:before {
  content: '←';
  margin-right: var(--space-1);
  font-size: 1.1em;
}

.back-link:hover {
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0,0,0,0.1);
}

/* 4.4 Footer */
footer {
  background-color: var(--theme-footer);
  color: var(--color-light);
  padding: var(--space-5) 0 var(--space-3);
  margin-top: var(--space-5);
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.footer-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
  column-gap: 2rem;
  row-gap: 1.5rem;
}

.footer-branding {
  display: flex;
  align-items: center;
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
}

.footer-branding .emoji {
  font-size: 1.4rem;
  margin-right: var(--space-1);
}

.footer-branding .music-icon {
  color: var(--color-light);
  margin-right: var(--space-2);
}

.footer-company {
  font-size: var(--text-xs);
  color: var(--color-gray-light);
  margin-top: var(--space-1);
}

.footer-updated {
  color: var(--color-gray-light);
  font-size: var(--text-xs);
}

.footer-links {
  display: flex;
  gap: var(--space-4);
}

.footer-link {
  color: var(--color-white);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  transition: var(--transition-all);
}

.footer-link .icon {
  font-size: 1.1rem;
}

.footer-link:hover {
  color: var(--color-primary-light);
}

.copyright {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-gray-dark);
  padding-top: var(--space-4);
  border-top: 1px solid rgba(255,255,255,0.1);
}

/*-------------------------------------*\
  5. PAGE-SPECIFIC STYLES
\*-------------------------------------*/

/* 5.1 Homepage */
.hero {
  padding: var(--space-5) 0 var(--space-4);
  text-align: center;
}

.hero h1 {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-3);
  background: linear-gradient(to right, var(--theme-primary), var(--theme-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: var(--line-tight);
}

.hero p {
  font-size: var(--text-md);
  max-width: 700px;
  margin: 0 auto var(--space-4);
  color: var(--color-gray);
}

.features {
  padding: var(--space-3) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-5);
}

.section-title h2 {
  font-size: var(--text-xl);
  position: relative;
  display: inline-block;
  padding-bottom: var(--space-3);
}

.section-title h2::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(to right, var(--theme-primary), var(--theme-secondary));
  border-radius: 2px;
}

/* 5.2 Policy Pages */
.policy-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.policy-header {
  text-align: center;
  padding: var(--space-4) 0 var(--space-5);
}

.policy-header h1 {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-4);
  color: var(--theme-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.policy-header h1 span {
  background: linear-gradient(to right, var(--theme-primary), var(--theme-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.policy-metadata {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-5);
  margin: var(--space-1) 0 var(--space-3);
  font-size: 1.05rem;
}

.policy-intro {
  font-size: var(--text-md);
  max-width: 750px;
  margin: 0 auto var(--space-4);
  color: var(--color-gray);
  line-height: var(--line-relaxed);
}

.card-title {
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
  color: var(--color-dark);
  margin: 0.35rem 0 0 0;
  line-height: var(--line-tight);
}

.card-content {
  font-size: var(--text-sm);
  color: var(--color-gray);
  line-height: var(--line-relaxed);
  margin-top: var(--space-1);
}

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

/* Text utilities */
.gradient-text {
  background: linear-gradient(to right, var(--theme-primary), var(--theme-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

/* Spacing utilities */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }

.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }

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

/* Focus trap - for accessibility modals */
[data-js-focus-visible] :focus:not([data-focus-visible-added]) {
  outline: none;
}

/* Visually hide content that will be announced by screen readers */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
  white-space: nowrap;
}

/*-------------------------------------*\
  7. PRINT STYLES
\*-------------------------------------*/
@media print {
  body {
    background-color: #fff !important;
    color: #000 !important;
  }

  .card {
    break-inside: avoid;
    page-break-inside: avoid;
    box-shadow: none !important;
    border: 1px solid #eee;
  }

  .badge-circle {
    box-shadow: none !important;
    border: 1px solid #333;
  }

  .card::before {
    display: none !important;
  }

  header, footer, .back-link, .btn {
    display: none !important;
  }

  .policy-header h1 {
    color: #000 !important;
    -webkit-text-fill-color: #000;
  }

  .policy-header h1 span {
    color: #000 !important;
    -webkit-text-fill-color: #000;
  }

  a {
    text-decoration: none !important;
    color: #000 !important;
  }
  
  .policy-grid {
    display: block;
  }
  
  .policy-card {
    margin-bottom: 1em;
  }
}

/*-------------------------------------*\
  8. MEDIA QUERIES
\*-------------------------------------*/
@media (max-width: 1024px) {
  .policy-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --text-3xl: 2rem;
    --text-2xl: 1.75rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .policy-grid {
    grid-template-columns: 1fr;
  }
  
  .card-header {
    align-items: center;
  }
  
  .hero p, 
  .policy-intro {
    font-size: var(--text-sm);
  }
  
  .footer-main {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .footer-links {
    margin-top: var(--space-4);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
}

/* Dark mode implementation */
@media (prefers-color-scheme: dark) {
  :root {
    /* Theme colors for dark mode */
    --theme-primary: var(--color-primary-400);
    --theme-secondary: var(--color-accent-400);
    --theme-text: var(--color-gray-100);
    --theme-card: #1f1f35;
    --theme-footer: #0f0f1f;
    --theme-background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    
    /* Adjust shadows for dark mode */
    --shadow-color: 246deg 40% 10%;
    
    /* Card shadow adjustment */
    --shadow-sm: 
      0 1px 2px hsl(var(--shadow-color) / 0.2),
      0 1px 1px hsl(var(--shadow-color) / 0.25);
      
    --shadow-md: 
      0 4px 6px -1px hsl(var(--shadow-color) / 0.3),
      0 2px 4px -2px hsl(var(--shadow-color) / 0.3);
      
    --shadow-lg: 
      0 10px 15px -3px hsl(var(--shadow-color) / 0.3),
      0 4px 6px -4px hsl(var(--shadow-color) / 0.3);
      
    /* Text color adjustments */  
    --color-gray: #a9adc1;
    --color-gray-light: #8e92ad;
    --color-gray-dark: #63658f;
  }
  
  /* Specific component overrides for dark mode */
  .card {
    border: 1px solid rgba(255, 255, 255, 0.05);
  }
  
  .back-link {
    background: var(--theme-card);
  }
  
  .card-title {
    color: var(--color-light);
  }
  
  header {
    background: rgba(26, 26, 46, 0.8);
  }
}

/* High contrast mode for improved accessibility */
@media (forced-colors: active) {
  .card::before {
    border-left: 3px solid LinkText;
  }
  
  .btn {
    border: 1px solid ButtonText;
  }
}