/* ============================================================
   LinkMoment — Design System
   Core design tokens, utilities, and shared styles
   ============================================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400;1,500&family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Great+Vibes&display=swap');

/* ============================================================
   1. Design Tokens (CSS Custom Properties)
   ============================================================ */
:root {
  /* --- Brand Colors --- */
  --color-primary: #B8860B;        /* Dark Goldenrod */
  --color-primary-light: #D4A843;
  --color-primary-dark: #8B6508;
  --color-primary-50: rgba(184, 134, 11, 0.05);
  --color-primary-100: rgba(184, 134, 11, 0.1);
  --color-primary-200: rgba(184, 134, 11, 0.2);

  --color-secondary: #C4707A;      /* Dusty Rose */
  --color-secondary-light: #E8A5AE;
  --color-secondary-dark: #9E4F58;

  --color-accent: #2D6A4F;         /* Forest Green */
  --color-accent-light: #52B788;
  --color-accent-dark: #1B4332;

  /* --- Neutral Colors --- */
  --color-white: #FFFFFF;
  --color-gray-50: #FAFAF9;
  --color-gray-100: #F5F5F4;
  --color-gray-200: #E7E5E4;
  --color-gray-300: #D6D3D1;
  --color-gray-400: #A8A29E;
  --color-gray-500: #78716C;
  --color-gray-600: #57534E;
  --color-gray-700: #44403C;
  --color-gray-800: #292524;
  --color-gray-900: #1C1917;
  --color-black: #0A0A0A;

  /* --- Semantic Colors --- */
  --color-success: #22C55E;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --color-info: #3B82F6;

  /* --- Background Colors --- */
  --bg-primary: #FFFDF7;           /* Warm Ivory */
  --bg-secondary: #FFF8EE;         /* Soft Cream */
  --bg-tertiary: #F5EFE6;          /* Warm Beige */
  --bg-dark: #1C1917;
  --bg-dark-secondary: #292524;

  /* --- Gradient Presets --- */
  --gradient-gold: linear-gradient(135deg, #B8860B 0%, #D4A843 50%, #B8860B 100%);
  --gradient-gold-shine: linear-gradient(90deg, #B8860B, #F0D68A, #B8860B);
  --gradient-rose: linear-gradient(135deg, #C4707A 0%, #E8A5AE 100%);
  --gradient-hero: linear-gradient(160deg, #FFFDF7 0%, #FFF8EE 30%, #FFF0E0 60%, #FFE8D6 100%);
  --gradient-dark: linear-gradient(160deg, #1C1917 0%, #292524 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);

  /* --- Typography --- */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-script: 'Great Vibes', cursive;

  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */
  --text-7xl: 4.5rem;      /* 72px */

  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.5;
  --leading-relaxed: 1.7;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.05em;
  --tracking-wider: 0.1em;

  /* --- Spacing Scale --- */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */

  /* --- Border Radius --- */
  --radius-sm: 0.375rem;    /* 6px */
  --radius-md: 0.5rem;      /* 8px */
  --radius-lg: 0.75rem;     /* 12px */
  --radius-xl: 1rem;        /* 16px */
  --radius-2xl: 1.5rem;     /* 24px */
  --radius-3xl: 2rem;       /* 32px */
  --radius-full: 9999px;

  /* --- Shadows --- */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  --shadow-glow-gold: 0 0 20px rgba(184, 134, 11, 0.15), 0 0 60px rgba(184, 134, 11, 0.05);
  --shadow-glow-rose: 0 0 20px rgba(196, 112, 122, 0.15), 0 0 60px rgba(196, 112, 122, 0.05);
  --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.05);

  /* --- Transitions --- */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 800ms;

  /* --- Z-Index Scale --- */
  --z-behind: -1;
  --z-base: 0;
  --z-raised: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
  --z-tooltip: 600;

  /* --- Container --- */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1200px;
  --container-2xl: 1400px;
}

/* ============================================================
   2. CSS Reset & Base Styles
   ============================================================ */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-gray-800);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

img, video, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

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

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

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-gray-900);
}

p {
  line-height: var(--leading-relaxed);
}

::selection {
  background: var(--color-primary-200);
  color: var(--color-gray-900);
}

/* ============================================================
   3. Layout Utilities
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }
.container-2xl { max-width: var(--container-2xl); }

.section {
  padding: var(--space-20) 0;
}

.section-lg {
  padding: var(--space-32) 0;
}

/* ============================================================
   4. Component Styles
   ============================================================ */

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--text-sm);
  line-height: 1;
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: opacity var(--duration-fast) ease;
}

.btn:hover::after {
  opacity: 1;
}

.btn-primary {
  background: var(--gradient-gold);
  color: var(--color-white);
  box-shadow: var(--shadow-md), 0 2px 8px rgba(184, 134, 11, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 4px 16px rgba(184, 134, 11, 0.4);
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary-50);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-gray-700);
}

.btn-ghost:hover {
  background: var(--color-gray-100);
  color: var(--color-gray-900);
}

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

.btn-xl {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-lg);
}

.btn-icon {
  padding: var(--space-3);
  border-radius: var(--radius-lg);
}

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  border-radius: var(--radius-full);
  background: var(--color-primary-100);
  color: var(--color-primary-dark);
}

.badge-gold {
  background: var(--gradient-gold);
  color: var(--color-white);
}

/* --- Card --- */
.card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray-200);
  padding: var(--space-8);
  transition: all var(--duration-normal) var(--ease-out);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-gray-300);
  transform: translateY(-4px);
}

.card-glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

/* --- Section Header --- */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-16);
}

.section-header .badge {
  margin-bottom: var(--space-4);
}

.section-header h2 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: var(--text-lg);
  color: var(--color-gray-500);
}

/* --- Divider --- */
.divider-ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin: var(--space-8) 0;
  color: var(--color-primary);
}

.divider-ornament::before,
.divider-ornament::after {
  content: '';
  flex: 1;
  max-width: 80px;
  height: 1px;
  background: var(--gradient-gold);
  opacity: 0.4;
}

/* ============================================================
   5. Animation Utilities
   ============================================================ */

/* Scroll Reveal Base */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slower) var(--ease-out),
              transform var(--duration-slower) var(--ease-out);
}

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

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }
.reveal-delay-5 { transition-delay: 500ms; }

/* Fade variants */
.reveal-fade { transform: none; }
.reveal-slide-left { transform: translateX(-30px); }
.reveal-slide-right { transform: translateX(30px); }
.reveal-zoom { transform: scale(0.95); }

.reveal-slide-left.revealed,
.reveal-slide-right.revealed,
.reveal-zoom.revealed {
  transform: none;
}

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

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

/* Shimmer effect */
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.text-shimmer {
  background: var(--gradient-gold-shine);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 3s linear infinite;
}

/* Pulse glow */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(184, 134, 11, 0.1); }
  50% { box-shadow: 0 0 40px rgba(184, 134, 11, 0.2); }
}

/* Spin slow */
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.animate-spin-slow {
  animation: spin-slow 20s linear infinite;
}

/* ============================================================
   6. Responsive Breakpoints
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --text-4xl: 1.875rem;
    --text-5xl: 2.25rem;
    --text-6xl: 2.75rem;
    --text-7xl: 3.25rem;
  }

  .container {
    padding: 0 var(--space-4);
  }

  .section {
    padding: var(--space-16) 0;
  }

  .section-lg {
    padding: var(--space-20) 0;
  }

  .section-header h2 {
    font-size: var(--text-3xl);
  }
}

@media (max-width: 480px) {
  :root {
    --text-4xl: 1.625rem;
    --text-5xl: 2rem;
    --text-6xl: 2.25rem;
    --text-7xl: 2.75rem;
  }
}

/* ============================================================
   7. Accessibility
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* Focus visible for keyboard nav */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* 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: 0;
}