/* ============================================
   SUPPLEMENT ENCYCLOPEDIA - DESIGN SYSTEM
   Premium Dark Mode with Glassmorphism
   ============================================ */

/* ============================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================ */
:root {
  /* Primary Colors */
  --color-primary: #00d4aa;
  --color-primary-light: #00ffcc;
  --color-primary-dark: #00a88a;
  --color-primary-glow: rgba(0, 212, 170, 0.4);

  /* Secondary Colors */
  --color-secondary: #7c3aed;
  --color-secondary-light: #a855f7;
  --color-secondary-dark: #5b21b6;

  /* Accent Colors */
  --color-accent-blue: #3b82f6;
  --color-accent-orange: #f97316;
  --color-accent-pink: #ec4899;
  --color-accent-yellow: #eab308;

  /* Background Colors (Dark Theme) */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a25;
  --bg-elevated: #22222f;
  --bg-glass: rgba(20, 20, 30, 0.7);
  --bg-glass-light: rgba(30, 30, 45, 0.5);

  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-tertiary: #6b6b80;
  --text-muted: #4a4a5a;

  /* Border Colors */
  --border-primary: rgba(255, 255, 255, 0.1);
  --border-secondary: rgba(255, 255, 255, 0.05);
  --border-glow: rgba(0, 212, 170, 0.3);

  /* Status Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* Evidence Rating Colors */
  --evidence-strong: #10b981;
  --evidence-moderate: #3b82f6;
  --evidence-emerging: #f59e0b;
  --evidence-limited: #ef4444;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  --gradient-hero: linear-gradient(135deg, #0a0a0f 0%, #1a1a2e 50%, #0a0a0f 100%);
  --gradient-card: linear-gradient(145deg, rgba(30, 30, 45, 0.6) 0%, rgba(20, 20, 30, 0.8) 100%);
  --gradient-glow: radial-gradient(ellipse at center, var(--color-primary-glow) 0%, transparent 70%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Outfit', var(--font-primary);
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;

  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

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

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-3xl: 2rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 40px var(--color-primary-glow);
  --shadow-glow-sm: 0 0 20px var(--color-primary-glow);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-bouncy: 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Z-Index Scale */
  --z-base: 0;
  --z-elevated: 10;
  --z-sticky: 100;
  --z-modal-backdrop: 200;
  --z-modal: 300;
  --z-popover: 400;
  --z-tooltip: 500;
  --z-max: 9999;

  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}

/* ============================================
   CSS RESET & BASE STYLES
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Selection Styling */
::selection {
  background: var(--color-primary);
  color: var(--bg-primary);
}

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

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

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

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

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

/* Lists */
ul,
ol {
  list-style: none;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

h1 {
  font-size: var(--text-5xl);
}

h2 {
  font-size: var(--text-4xl);
}

h3 {
  font-size: var(--text-3xl);
}

h4 {
  font-size: var(--text-2xl);
}

h5 {
  font-size: var(--text-xl);
}

h6 {
  font-size: var(--text-lg);
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-glow {
  text-shadow: 0 0 30px var(--color-primary-glow);
}

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

.container-fluid {
  width: 100%;
  padding: 0 var(--space-6);
}

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

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

/* Flexbox Utilities */
.flex {
  display: flex;
}

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

.flex-wrap {
  flex-wrap: wrap;
}

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

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

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

.justify-end {
  justify-content: flex-end;
}

.gap-1 {
  gap: var(--space-1);
}

.gap-2 {
  gap: var(--space-2);
}

.gap-3 {
  gap: var(--space-3);
}

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

.gap-6 {
  gap: var(--space-6);
}

.gap-8 {
  gap: var(--space-8);
}

/* Grid Utilities */
.grid {
  display: grid;
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ============================================
   GLASSMORPHISM EFFECTS
   ============================================ */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-primary);
}

.glass-light {
  background: var(--bg-glass-light);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-secondary);
}

.glass-card {
  background: var(--gradient-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

@keyframes glow {

  0%,
  100% {
    box-shadow: 0 0 20px var(--color-primary-glow);
  }

  50% {
    box-shadow: 0 0 40px var(--color-primary-glow), 0 0 60px var(--color-primary-glow);
  }
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }

  100% {
    background-position: 200% 0;
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

/* Animation Classes */
.animate-fade-in {
  animation: fadeIn 0.5s ease forwards;
}

.animate-fade-in-up {
  animation: fadeInUp 0.5s ease forwards;
}

.animate-fade-in-down {
  animation: fadeInDown 0.5s ease forwards;
}

.animate-scale-in {
  animation: scaleIn 0.3s ease forwards;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

.animate-glow {
  animation: glow 2s ease-in-out infinite;
}

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

.animate-spin {
  animation: spin 1s linear infinite;
}

/* Staggered Animation */
.stagger-1 {
  animation-delay: 0.1s;
}

.stagger-2 {
  animation-delay: 0.2s;
}

.stagger-3 {
  animation-delay: 0.3s;
}

.stagger-4 {
  animation-delay: 0.4s;
}

.stagger-5 {
  animation-delay: 0.5s;
}

/* ============================================
   SCROLL-REVEAL ANIMATIONS
   ============================================ */
@keyframes revealUp {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.97);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes revealLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes revealRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes typewriterBlink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

@keyframes countPop {
  0% {
    transform: scale(0.5);
    opacity: 0;
  }

  70% {
    transform: scale(1.1);
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes sectionDividerShimmer {
  0% {
    background-position: -200% center;
  }

  100% {
    background-position: 200% center;
  }
}

@keyframes leafSway {

  0%,
  100% {
    transform: rotate(0deg);
  }

  25% {
    transform: rotate(8deg);
  }

  75% {
    transform: rotate(-8deg);
  }
}

@keyframes sparkle {

  0%,
  100% {
    filter: brightness(1);
  }

  50% {
    filter: brightness(1.6) drop-shadow(0 0 8px currentColor);
  }
}

@keyframes gentleBounce {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-6px);
  }
}

/* Scroll-reveal base */
.scroll-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: none;
}

.scroll-reveal.revealed {
  animation: revealUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

/* Stagger children on reveal */
.scroll-reveal.revealed.stagger-delay-1 {
  animation-delay: 0.05s;
}

.scroll-reveal.revealed.stagger-delay-2 {
  animation-delay: 0.1s;
}

.scroll-reveal.revealed.stagger-delay-3 {
  animation-delay: 0.15s;
}

.scroll-reveal.revealed.stagger-delay-4 {
  animation-delay: 0.2s;
}

.scroll-reveal.revealed.stagger-delay-5 {
  animation-delay: 0.25s;
}

.scroll-reveal.revealed.stagger-delay-6 {
  animation-delay: 0.3s;
}

.scroll-reveal.revealed.stagger-delay-7 {
  animation-delay: 0.35s;
}

.scroll-reveal.revealed.stagger-delay-8 {
  animation-delay: 0.4s;
}

.scroll-reveal.revealed.stagger-delay-9 {
  animation-delay: 0.45s;
}

.scroll-reveal.revealed.stagger-delay-10 {
  animation-delay: 0.5s;
}

.scroll-reveal.revealed.stagger-delay-11 {
  animation-delay: 0.55s;
}

.scroll-reveal.revealed.stagger-delay-12 {
  animation-delay: 0.6s;
}

.scroll-reveal.revealed.stagger-delay-13 {
  animation-delay: 0.65s;
}

/* Section divider */
.section-divider {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-secondary), var(--color-primary), transparent);
  background-size: 200% 100%;
  animation: sectionDividerShimmer 4s linear infinite;
  opacity: 0.5;
}

/* ============================================
   PARTICLE BACKGROUND
   ============================================ */
.particles-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-primary);
  border-radius: 50%;
  opacity: 0.3;
  animation: float 6s ease-in-out infinite;
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-elevated);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-dark);
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */
@media (max-width: 1280px) {
  :root {
    --text-5xl: 2.5rem;
    --text-6xl: 3rem;
    --text-7xl: 3.5rem;
  }
}

@media (max-width: 1024px) {
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --text-4xl: 1.875rem;
    --text-5xl: 2.25rem;
    --text-6xl: 2.5rem;
  }

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

  .section {
    padding: var(--space-12) 0;
  }

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

  .hide-mobile {
    display: none !important;
  }
}

@media (max-width: 480px) {
  :root {
    --text-3xl: 1.5rem;
    --text-4xl: 1.75rem;
    --text-5xl: 2rem;
  }
}