/* =================================
   Echo Chamber //回声室 - Main Styles
   A postmodern philosophical experience
   ================================= */

/* Custom Properties */
:root {
  /* Elegant Color Palette - Dark */
  --primary-bg: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
  --secondary-bg: rgba(20, 25, 45, 0.95);
  --tertiary-bg: rgba(30, 35, 55, 0.8);
  --accent-color: #c9a96e;
  --accent-secondary: #7c9885;
  --accent-tertiary: #8b7355;
  --text-primary: #f8f6f0;
  --text-secondary: #d4d1c7;
  --text-muted: #a09b8e;
  --border-color: rgba(201, 169, 110, 0.15);
  --glass-bg: rgba(20, 25, 45, 0.6);
  --glass-border: rgba(201, 169, 110, 0.2);
  --card-bg: rgba(15, 20, 35, 0.8);
  --shadow-color: rgba(0, 0, 0, 0.5);
}

/* Light Theme */
[data-theme="light"] {
  --primary-bg: linear-gradient(135deg, #faf8f3 0%, #f5f2eb 50%, #ebe6db 100%);
  --secondary-bg: rgba(250, 248, 243, 0.95);
  --tertiary-bg: rgba(235, 230, 219, 0.9);
  --accent-color: #8b6914;
  --accent-secondary: #2d5a3d;
  --accent-tertiary: #6b4423;
  --text-primary: #2c2419;
  --text-secondary: #4a3f2f;
  --text-muted: #6b5d4f;
  --border-color: rgba(139, 105, 20, 0.2);
  --glass-bg: rgba(250, 248, 243, 0.8);
  --glass-border: rgba(139, 105, 20, 0.3);
  --card-bg: rgba(255, 253, 248, 0.9);
  --shadow-color: rgba(44, 36, 25, 0.1);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Crimson Text', Georgia, 'Times New Roman', serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-xxl: 3rem;
  
  /* Animation */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.6s ease-out;
  
  /* Z-index layers */
  --z-background: -1;
  --z-content: 1;
  --z-navigation: 10;
  --z-modal: 100;
  --z-loading: 1000;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  height: 100%;
}

body {
  font-family: var(--font-primary);
  background: var(--primary-bg);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
  font-weight: 300;
  letter-spacing: 0.01em;
}

/* Accessibility */
.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;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--accent-color);
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: 1000;
  border-radius: 4px;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-loading);
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* Ensure loading screen completely covers content */
.loading-screen::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--primary-bg);
  z-index: -1;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
}

.loading-orb {
  position: relative;
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-lg);
}

.orb-core {
  width: 40px;
  height: 40px;
  background: radial-gradient(circle, var(--accent-color), var(--accent-secondary));
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: orb-pulse 2s infinite ease-in-out;
}

.orb-rings {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.ring {
  position: absolute;
  border: 1px solid var(--accent-color);
  border-radius: 50%;
  animation: ring-expand 3s infinite ease-out;
}

.ring:nth-child(1) {
  animation-delay: 0s;
}

.ring:nth-child(2) {
  animation-delay: 1s;
}

.ring:nth-child(3) {
  animation-delay: 2s;
}

.loading-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-style: italic;
}

/* Main Layout */
.page-wrapper {
  min-height: 100vh;
  position: relative;
  overflow: hidden;
}

.echo-chamber {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto auto;
  grid-template-areas: 
    "header"
    "universe"
    "reflection"
    "navigation";
  gap: clamp(2rem, 5vw, 4rem);
  padding: clamp(1.5rem, 4vw, 3rem);
  max-width: 1600px;
  margin: 0 auto;
}

/* Header */
.chamber-entrance {
  grid-area: header;
  text-align: center;
  padding: clamp(3rem, 8vw, 6rem) 0;
  position: relative;
  margin-bottom: clamp(2rem, 4vw, 4rem);
}

.chamber-title {
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 200;
  margin-bottom: clamp(1.5rem, 3vw, 3rem);
  position: relative;
  letter-spacing: 0.02em;
}

.glitch {
  position: relative;
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-secondary) 50%, var(--accent-tertiary) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  background-size: 200% 200%;
  animation: gradient-shift 8s ease-in-out infinite;
}

.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, var(--accent-color), var(--accent-secondary));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.glitch::before {
  animation: glitch-anim-1 2s infinite linear alternate-reverse;
}

.glitch::after {
  animation: glitch-anim-2 1s infinite linear alternate-reverse;
}

.subtitle {
  font-size: clamp(1rem, 3vw, 1.5rem);
  color: var(--text-secondary);
  font-weight: 300;
  letter-spacing: 0.1em;
  display: block;
  margin-top: var(--space-sm);
}

.chamber-manifesto {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: var(--space-xl) auto 0;
  line-height: 1.8;
}

.chamber-manifesto em {
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.9rem;
}

/* Philosophy Orb */
.philosophy-orb {
  position: absolute;
  top: 50%;
  right: 8%;
  transform: translateY(-50%);
  width: clamp(100px, 12vw, 160px);
  height: clamp(100px, 12vw, 160px);
  pointer-events: all;
  cursor: pointer;
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 100;
  border-radius: 50%;
  background: transparent;
}

.philosophy-orb:hover {
  transform: translateY(-50%) scale(1.1);
  filter: brightness(1.2) saturate(1.3);
}

.philosophy-orb:hover .orb-core {
  animation: orb-float-fast 2s ease-in-out infinite, orb-rotate 4s linear infinite;
}

.philosophy-orb:hover .orb-pulse {
  animation: orb-pulse-ring-fast 1.5s ease-out infinite;
}

.orb-reflection {
  position: absolute;
  width: 100%;
  height: 100%;
  background: radial-gradient(
    circle at 30% 30%,
    rgba(255, 255, 255, 0.3),
    transparent 50%
  );
  border-radius: 50%;
  filter: blur(2px);
  pointer-events: none;
}

.orb-core {
  position: absolute;
  width: 80%;
  height: 80%;
  top: 10%;
  left: 10%;
  background: radial-gradient(
    circle at 40% 40%,
    var(--accent-secondary),
    var(--accent-color)
  );
  border-radius: 50%;
  animation: orb-float 6s ease-in-out infinite;
  pointer-events: none;
}

  .orb-pulse {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--accent-color);
    border-radius: 50%;
    animation: orb-pulse-ring 3s ease-out infinite;
    pointer-events: none;
  }

/* Orb Tooltip */
.orb-tooltip {
  position: absolute;
  top: calc(100% + 20px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.8rem 1.2rem;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-style: italic;
  white-space: nowrap;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px var(--shadow-color);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
  pointer-events: none;
  min-width: 250px;
  max-width: 350px;
  text-align: center;
  font-weight: 300;
  letter-spacing: 0.01em;
}

.orb-tooltip.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.orb-tooltip::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 6px solid var(--border-color);
}

/* Quote Universe */
.quote-universe {
  grid-area: universe;
  position: relative;
}

.universe-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: clamp(2rem, 4vw, 3rem);
  margin-bottom: clamp(3rem, 6vw, 5rem);
}

.quote-entity {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: clamp(2rem, 4vw, 3rem);
  position: relative;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity var(--transition-normal), transform var(--transition-normal);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
  box-shadow: 0 8px 32px var(--shadow-color);
}

.quote-entity::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-color), var(--accent-secondary));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.quote-entity:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: var(--accent-color);
  box-shadow: 0 20px 60px var(--shadow-color), 0 0 0 1px var(--accent-color);
  background: var(--glass-bg);
}

.quote-entity:hover::before {
  opacity: 1;
}

.quote-frame {
  position: relative;
  z-index: 1;
}

.philosophical-quote {
  margin: 0;
}

.quote-text {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2.5vw, 1.3rem);
  line-height: 1.8;
  margin-bottom: clamp(1.5rem, 3vw, 2rem);
  color: var(--text-primary);
  font-style: italic;
  font-weight: 400;
}

.quote-translation {
  font-size: clamp(1rem, 2vw, 1.1rem);
  color: var(--text-secondary);
  margin-bottom: clamp(1.5rem, 3vw, 2rem);
  padding-left: clamp(1rem, 2vw, 1.5rem);
  border-left: 3px solid var(--accent-color);
  font-weight: 300;
  line-height: 1.6;
}

.quote-author {
  display: block;
  font-style: normal;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.author-name {
  font-weight: 500;
  color: var(--accent-secondary);
}

.author-period {
  font-size: 0.8rem;
  opacity: 0.7;
  margin-left: var(--space-sm);
}

/* Echo Chamber Mini */
.echo-chamber-mini {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-color);
}

.echo-count {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.count-number {
  font-weight: 600;
  color: var(--accent-color);
}

.echo-trigger {
  position: relative;
  background: none;
  border: 2px solid var(--accent-color);
  color: var(--accent-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  overflow: hidden;
}

.echo-trigger:hover {
  background: var(--accent-color);
  color: var(--primary-bg);
  transform: scale(1.1);
}

.echo-ripple {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 107, 107, 0.3);
  transform: translate(-50%, -50%);
  transition: all var(--transition-normal);
}

.echo-trigger:active .echo-ripple {
  width: 200px;
  height: 200px;
}

/* Quote Metadata */
.quote-metadata {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  display: flex;
  gap: var(--space-xs);
}

.meta-category,
.meta-language {
  background: var(--secondary-bg);
  color: var(--text-muted);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 12px;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

/* Universe Controls */
.universe-controls {
  text-align: center;
  margin-top: var(--space-xl);
}

.generate-more {
  background: linear-gradient(135deg, var(--accent-color), var(--accent-secondary));
  border: none;
  color: var(--text-primary);
  padding: clamp(1rem, 2vw, 1.5rem) clamp(2rem, 4vw, 3rem);
  border-radius: 60px;
  font-size: clamp(1rem, 2vw, 1.1rem);
  font-weight: 400;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 32px var(--shadow-color);
  letter-spacing: 0.02em;
}

.generate-more:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 107, 0.4);
}

.control-icon {
  margin-left: var(--space-sm);
  font-size: 1.2rem;
  animation: rotate 3s linear infinite;
}

/* Reflection Panel */
.reflection-panel {
  grid-area: reflection;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: clamp(2rem, 4vw, 3rem);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  min-height: 400px;
  box-shadow: 0 12px 40px var(--shadow-color);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.panel-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.echo-pulse {
  width: 12px;
  height: 12px;
  background: var(--accent-color);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.echo-placeholder {
  text-align: center;
  padding: var(--space-xxl) var(--space-lg);
  color: var(--text-muted);
}

.placeholder-sub {
  font-size: 0.9rem;
  margin-top: var(--space-sm);
  opacity: 0.7;
}

/* Echo Form */
.echo-input-container {
  margin-top: var(--space-lg);
}

.echo-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.echo-input {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: var(--space-md);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 1rem;
  resize: vertical;
  min-height: 80px;
  transition: border-color var(--transition-normal);
}

.echo-input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.echo-form-actions {
  display: flex;
  gap: clamp(1rem, 2vw, 1.5rem);
  justify-content: flex-end;
  margin-top: clamp(1rem, 2vw, 1.5rem);
}

.echo-cancel,
.echo-submit {
  padding: clamp(0.8rem, 1.5vw, 1rem) clamp(1.5rem, 3vw, 2rem);
  border-radius: 12px;
  font-size: clamp(0.9rem, 1.5vw, 1rem);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  min-width: 80px;
}

.echo-cancel {
  background: var(--secondary-bg);
  color: var(--text-secondary);
}

.echo-cancel:hover {
  background: var(--tertiary-bg);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow-color);
}

.echo-submit {
  background: var(--accent-color);
  color: var(--text-primary);
  box-shadow: 0 2px 8px var(--shadow-color);
}

.echo-submit:hover {
  background: var(--accent-secondary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--shadow-color);
}

/* Navigation */
.chamber-navigation {
  grid-area: navigation;
  position: relative;
}

.nav-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}

.nav-crystal {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: clamp(0.8rem, 2vw, 1.2rem) clamp(1.5rem, 3vw, 2rem);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
  box-shadow: 0 4px 16px var(--shadow-color);
}

.nav-crystal.active {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

.nav-crystal:hover:not(.active) {
  border-color: var(--accent-color);
  color: var(--text-primary);
}

.crystal-face {
  position: relative;
  z-index: 1;
  font-weight: 500;
  font-size: 0.9rem;
}

.crystal-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle, var(--accent-color), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.nav-crystal:hover .crystal-glow {
  opacity: 0.1;
}

/* Background Elements */
.chamber-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-background);
  pointer-events: none;
  overflow: hidden;
}

.bg-particles,
.bg-waves,
.bg-fractals {
  position: absolute;
  width: 100%;
  height: 100%;
}

.bg-particles {
  background-image: 
    radial-gradient(1px 1px at 25% 35%, var(--accent-color), transparent),
    radial-gradient(1px 1px at 75% 65%, var(--accent-secondary), transparent),
    radial-gradient(0.5px 0.5px at 60% 20%, var(--accent-tertiary), transparent);
  background-size: 400px 400px, 500px 500px, 300px 300px;
  opacity: 0.4;
  animation: particles-drift 30s linear infinite;
}

.bg-waves {
  background: 
    linear-gradient(45deg, transparent 45%, rgba(201, 169, 110, 0.02) 50%, transparent 55%),
    linear-gradient(-45deg, transparent 45%, rgba(124, 152, 133, 0.02) 50%, transparent 55%);
  background-size: 300px 300px, 400px 400px;
  animation: waves-flow 25s ease-in-out infinite;
}

.bg-fractals {
  background-image: conic-gradient(
    from 0deg at 50% 50%,
    transparent,
    rgba(255, 107, 107, 0.05),
    transparent,
    rgba(78, 205, 196, 0.05),
    transparent
  );
  background-size: 400px 400px;
  animation: fractals-rotate 30s linear infinite;
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: var(--z-navigation);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.theme-toggle:hover {
  border-color: var(--accent-color);
  transform: scale(1.1);
}

/* Animations */
@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes glitch-anim-1 {
  0% { clip: rect(13px, 9999px, 31px, 0); }
  25% { clip: rect(39px, 9999px, 85px, 0); }
  50% { clip: rect(71px, 9999px, 43px, 0); }
  75% { clip: rect(25px, 9999px, 99px, 0); }
  100% { clip: rect(53px, 9999px, 17px, 0); }
}

@keyframes glitch-anim-2 {
  0% { clip: rect(65px, 9999px, 119px, 0); }
  25% { clip: rect(79px, 9999px, 31px, 0); }
  50% { clip: rect(95px, 9999px, 23px, 0); }
  75% { clip: rect(15px, 9999px, 47px, 0); }
  100% { clip: rect(35px, 9999px, 91px, 0); }
}

@keyframes orb-float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(180deg); }
}

@keyframes orb-pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.7; }
}

@keyframes orb-pulse-ring {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(2); opacity: 0; }
}

@keyframes orb-float-fast {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-15px) rotate(180deg); }
}

@keyframes orb-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes orb-pulse-ring-fast {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(2.5); opacity: 0; }
}

@keyframes ring-expand {
  0% { 
    width: 20px; 
    height: 20px; 
    top: 30px; 
    left: 30px; 
    opacity: 1; 
  }
  100% { 
    width: 80px; 
    height: 80px; 
    top: 0; 
    left: 0; 
    opacity: 0; 
  }
}

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

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes particles-drift {
  0% { transform: translateX(-50px) translateY(-50px); }
  100% { transform: translateX(50px) translateY(50px); }
}

@keyframes waves-flow {
  0%, 100% { transform: translateX(0) translateY(0); }
  25% { transform: translateX(20px) translateY(10px); }
  50% { transform: translateX(0) translateY(20px); }
  75% { transform: translateX(-20px) translateY(10px); }
}

@keyframes fractals-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes quote-appear {
  0% { 
    opacity: 0; 
    transform: translateY(20px) scale(0.95); 
  }
  100% { 
    opacity: 1; 
    transform: translateY(0) scale(1); 
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .echo-chamber {
    grid-template-areas: 
      "header"
      "universe"
      "reflection"
      "navigation";
    padding: clamp(1rem, 3vw, 2rem);
    gap: clamp(1.5rem, 4vw, 2.5rem);
  }
  
  .philosophy-orb {
    display: none;
  }
  
  .universe-grid {
    grid-template-columns: 1fr;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
  
  .nav-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(0.8rem, 2vw, 1.2rem);
  }
  
  .theme-toggle {
    top: clamp(1rem, 3vw, 2rem);
    right: clamp(1rem, 3vw, 2rem);
  }
  
  .chamber-title {
    font-size: clamp(2.5rem, 10vw, 4rem);
  }
  
  .quote-entity {
    padding: clamp(1.5rem, 4vw, 2rem);
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .echo-chamber {
    grid-template-columns: 2fr 1fr;
    grid-template-areas: 
      "header header"
      "universe reflection"
      "navigation navigation";
  }
}

@media (min-width: 1025px) {
  .echo-chamber {
    grid-template-columns: 2fr 1fr;
    grid-template-areas: 
      "header header"
      "universe reflection"
      "navigation navigation";
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --primary-bg: #000000;
    --text-primary: #ffffff;
    --border-color: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.1);
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .glitch::before,
  .glitch::after {
    display: none;
  }
}