@keyframes thinking-bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-5px);
  }
  60% {
    transform: translateY(-3px);
  }
}/* =============================================================================
   SETTINGS - Global variables, config switches
   ============================================================================= */
:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-bg-hover: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.3);
  --avatar-scale: 1.2;
  --avatar-translate-y: -50px;
  --button-primary: rgba(59, 130, 246, 0.2);
  --button-primary-hover: rgba(59, 130, 246, 0.3);
  --button-danger: rgba(239, 68, 68, 0.2);
  --button-gradient: linear-gradient(135deg, rgba(102, 126, 234, 0.4), rgba(118, 75, 162, 0.4));
  --button-gradient-hover: linear-gradient(135deg, rgba(102, 126, 234, 0.6), rgba(118, 75, 162, 0.6));
  --text-white: #ffffff;
  --text-white-secondary: rgba(255, 255, 255, 0.7);
  --text-dark: #333;
  --text-gray: #666;
  --shadow-light: 0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.15);
  --shadow-heavy: 0 10px 40px rgba(0, 0, 0, 0.2);
  --border-radius-small: 8px;
  --border-radius-medium: 15px;
  --border-radius-large: 25px;
  --border-radius-full: 50%;
  --transition-fast: 0.2s ease-in-out;
  --transition-medium: 0.5s ease;
}

/* =============================================================================
   GENERIC - Reset and normalize
   ============================================================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* =============================================================================
   ELEMENTS - Bare HTML elements (no classes)
   ============================================================================= */
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, sans-serif;
  /* Custom background image without overlay */
  background: 
    url('../images/background.png') center/cover no-repeat,
    var(--primary-gradient); /* Clean gradient fallback */
  background-attachment: fixed;
  overflow: hidden;
}

/* =============================================================================
   OBJECTS - Layout patterns (no cosmetics)
   ============================================================================= */
.container {
  display: flex;
  height: 100vh;
  width: 100vw;
  position: relative;
}

.avatar-section {
  width: 100%; 
  height: 100%; 
  position: relative;
}

.controls-section {
  display: none; /* Hide the left panel */
}

/* =============================================================================
   COMPONENTS - Specific UI components
   ============================================================================= */

/* Avatar Component */
#avatar { 
  width: 100%; 
  height: 100%;
  transform: scale(var(--avatar-scale)) translateY(var(--avatar-translate-y));
}

/* Loading Screen Component */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--primary-gradient);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  color: var(--text-white);
  font-family: system-ui, -apple-system, sans-serif;
  transition: opacity var(--transition-medium);
}

.loading-title {
  font-size: 2.5rem;
  font-weight: 300;
  margin-bottom: 1rem;
  text-align: center;
}

.loading-subtitle {
  font-size: 1.2rem;
  opacity: 0.8;
  margin-bottom: 3rem;
  text-align: center;
}

.loading-counter {
  font-size: 3rem;
  font-weight: 200;
  margin-bottom: 2rem;
  font-family: 'Courier New', monospace;
}

.loading-progress {
  width: 300px;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 1rem;
}

.loading-progress-bar {
  height: 100%;
  background: var(--text-white);
  transition: width var(--transition-medium);
}

/* Avatar Loading Screen with Countdown */
/* =============================================================================
   AVATAR LOADING SCREEN - Professional Design
   ============================================================================= */
.avatar-loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  opacity: 1;
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.avatar-loading-screen.hidden {
  opacity: 0;
  pointer-events: none;
}

.avatar-loading-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.avatar-loading-content {
  position: relative;
  text-align: center;
  color: var(--text-white);
  z-index: 1;
  padding: 3rem;
  backdrop-filter: blur(20px);
  background: rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  min-width: 400px;
  max-width: 500px;
}

.avatar-loading-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
  background: linear-gradient(135deg, #ffffff 0%, rgba(255, 255, 255, 0.8) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 2px 10px rgba(255, 255, 255, 0.3);
}

.avatar-loading-subtitle {
  font-size: 0.95rem;
  font-weight: 300;
  margin-bottom: 2.5rem;
  opacity: 0.8;
  letter-spacing: 0.05em;
}

.avatar-loading-countdown-wrapper {
  margin-bottom: 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.avatar-loading-countdown {
  font-size: 5.5rem;
  font-weight: 700;
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  min-height: 6.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #ffffff 0%, rgba(255, 255, 255, 0.9) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: countdownPulse 1s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  text-shadow: 0 0 30px rgba(255, 255, 255, 0.5);
  letter-spacing: -0.02em;
}

.countdown-label {
  font-size: 0.85rem;
  font-weight: 400;
  opacity: 0.7;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@keyframes countdownPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.95;
  }
}

.avatar-loading-progress {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 2rem;
  backdrop-filter: blur(10px);
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 1) 50%, rgba(255, 255, 255, 0.8) 100%);
  background-size: 200% 100%;
  border-radius: 10px;
  width: 0%;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
  animation: progressShimmer 2s ease-in-out infinite;
}

@keyframes progressShimmer {
  0% {
    background-position: -200% 0%;
  }
  100% {
    background-position: 200% 0%;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .avatar-loading-content {
    min-width: 90%;
    max-width: 90%;
    padding: 2rem 1.5rem;
  }
  
  .avatar-loading-title {
    font-size: 1.5rem;
  }
  
  .avatar-loading-subtitle {
    font-size: 0.85rem;
  }
  
  .avatar-loading-countdown {
    font-size: 4.5rem;
    min-height: 5.5rem;
  }
}

@media (max-width: 480px) {
  .avatar-loading-content {
    padding: 1.5rem 1rem;
  }
  
  .avatar-loading-title {
    font-size: 1.25rem;
  }
  
  .avatar-loading-countdown {
    font-size: 4rem;
    min-height: 5rem;
  }
}

.avatar-loading-spinner {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.spinner-ring {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.6);
  animation: spinnerPulse 1.4s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

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

.spinner-ring:nth-child(2) {
  animation-delay: 0.2s;
}

.spinner-ring:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes spinnerPulse {
  0%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.3);
    opacity: 1;
  }
}

.loading-progress-bar {
  height: 100%;
  background: white;
  border-radius: 2px;
  transition: width 0.3s ease;
  width: 0%;
}

.loading-text {
  font-size: 1rem;
  opacity: 0.7;
  text-align: center;
  min-height: 1.5rem;
}

/* Chat Input Component */
.chat-input-container {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  width: 90%;
  max-width: 600px;
}

.chat-input-form {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--glass-bg);
  padding: 12px;
  border-radius: var(--border-radius-large);
  border-left: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-border);
  backdrop-filter: blur(15px);
  box-shadow: 20px 20px 40px -6px rgba(0, 0, 0, 0.2);
  transition: all var(--transition-fast);
}

.chat-input-form:hover {
  background: var(--glass-bg-hover);
  box-shadow: 20px 20px 60px 8px rgba(0, 0, 0, 0.25);
  transform: translateY(-2px);
}

.main-text-input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-white);
  font-size: 16px;
  padding: 12px 20px;
  outline: none;
  border-radius: var(--border-radius-large);
  font-weight: 500;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
  transition: all var(--transition-fast);
}

.main-text-input::placeholder {
  color: var(--text-white-secondary);
  font-weight: 400;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.4);
}

.main-text-input:focus {
  background: rgba(255, 255, 255, 0.05);
  box-shadow: inset 2px 2px 10px rgba(0, 0, 0, 0.1);
}

/* Button Components */
.input-icon-button {
  width: 44px;
  height: 44px;
  border: none;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  backdrop-filter: blur(10px);
  border-left: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-border);
  box-shadow: var(--shadow-light);
}

.mic-button {
  background: var(--button-primary);
  color: var(--text-white);
}

.mic-button:hover:not(:disabled) {
  background: var(--button-primary-hover);
  transform: scale(1.05);
  box-shadow: 4px 4px 30px rgba(59, 130, 246, 0.3);
}

.mic-button.recording {
  background: var(--button-danger);
  color: var(--text-white);
  animation: pulse 2s infinite;
  box-shadow: 4px 4px 30px rgba(239, 68, 68, 0.4);
}

.send-button {
  background: var(--button-gradient);
  color: var(--text-white);
  box-shadow: 4px 4px 20px rgba(102, 126, 234, 0.2);
}

.send-button:hover:not(:disabled) {
  background: var(--button-gradient-hover);
  transform: scale(1.05);
  box-shadow: 4px 4px 30px rgba(102, 126, 234, 0.5);
}

/* Status Component */
.claude-status-indicator {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 8px;
  background: rgba(255, 255, 255, 0.15);
  color: white;
  padding: 8px 16px;
  border-radius: var(--border-radius-large);
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  backdrop-filter: blur(15px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-light);
  white-space: nowrap;
  z-index: 200;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--border-radius-full);
  background: #4ade80;
}

.status-dot.thinking {
  background: #fbbf24;
  animation: pulse 1.5s infinite;
}

.status-dot.knowledge-base {
  background: #8b5cf6;
  animation: kb-pulse 2s infinite;
}

/* Knowledge Base Thinking Bubble */
.knowledge-base-thinking {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  max-width: 350px;
  z-index: 1001;
  display: none;
  font-family: system-ui, -apple-system, sans-serif;
  animation: knowledge-fade-in 0.3s ease-out;
}


/* Events Thinking Bubble */
.events-thinking {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  max-width: 350px;
  z-index: 1001;
  display: none;
  font-family: system-ui, -apple-system, sans-serif;
  animation: knowledge-fade-in 0.3s ease-out;
}

.events-thinking.visible {
  display: block;
}

.events-thinking-content {
  background: white;
  color: var(--text-dark);
  padding: 18px 22px;
  border-radius: var(--border-radius-large);
  font-size: 18px;
  text-align: center;
  box-shadow: var(--shadow-medium);
  border: 4px solid var(--text-dark);
  position: relative;
  font-weight: 500;
  line-height: 1.4;
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.events-thinking-tail {
  position: absolute;
  bottom: -35px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 3px;
  align-items: center;
  z-index: 1;
}

.events-thinking-icon {
  font-size: 20px;
  animation: kb-spin 2s linear infinite;
}

.events-thinking-text {
  flex: 1;
  font-weight: 500;
  color: var(--text-dark);
}

.events-thinking-dots {
  font-size: 18px;
  animation: kb-dots 1.5s infinite;
}

.knowledge-base-thinking.visible {
  display: block;
}

.knowledge-base-thinking-content {
  background: white;
  color: var(--text-dark);
  padding: 18px 22px;
  border-radius: var(--border-radius-large);
  font-size: 18px;
  text-align: center;
  box-shadow: var(--shadow-medium);
  border: 4px solid var(--text-dark);
  position: relative;
  font-weight: 500;
  line-height: 1.4;
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

/* Thinking bubble tail with circles */
.knowledge-base-thinking-tail {
  position: absolute;
  bottom: -35px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 3px;
  align-items: center;
  z-index: 1;
}

.thinking-circle {
  width: 10px;
  height: 10px;
  background: white;
  border: 2px solid var(--text-dark);
  border-radius: 50%;
  animation: thinking-bounce 1.5s infinite;
}

.thinking-circle:nth-child(2) {
  width: 7px;
  height: 7px;
  border-width: 2px;
  animation-delay: 0.2s;
}

.thinking-circle:nth-child(3) {
  width: 4px;
  height: 4px;
  border-width: 1px;
  animation-delay: 0.4s;
}

.kb-thinking-icon {
  font-size: 20px;
  animation: kb-spin 2s linear infinite;
}

.kb-thinking-text {
  flex: 1;
  font-weight: 500;
  color: var(--text-dark);
}

.kb-thinking-dots {
  font-size: 18px;
  animation: kb-dots 1.5s infinite;
}

.status {
  display: none;
}

/* Speech Bubble Component */
.speech-bubble {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  max-width: 500px;
  z-index: 1000;
  display: none;
}

.speech-bubble-content {
  background: white;
  color: var(--text-dark);
  padding: 20px 25px;
  border-radius: var(--border-radius-large);
  font-size: 22px;
  text-align: center;
  box-shadow: var(--shadow-medium);
  border: 4px solid var(--text-dark);
  position: relative;
  font-family: system-ui, -apple-system, sans-serif;
  font-weight: 400;
  font-style: normal;
  line-height: 1.4;
  min-height: 60px;
  max-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

/* Text content wrapper for overflow handling */
#speechBubbleText {
  overflow: hidden;
  text-overflow: ellipsis;
  word-wrap: break-word;
  width: 100%;
}

/* Speech bubble sizing variants */
.speech-bubble-content.speech-bubble-compact {
  font-size: 20px;
  line-height: 1.3;
  padding: 18px 22px;
}

.speech-bubble-content.speech-bubble-small {
  font-size: 18px;
  line-height: 1.25;
  padding: 16px 20px;
  max-height: 90px;
}

.speech-bubble-tail {
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 15px solid transparent;
  border-right: 15px solid transparent;
  border-top: 15px solid var(--text-dark);
  z-index: 1;
}

.speech-bubble-tail-inner {
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 12px solid transparent;
  border-right: 12px solid transparent;
  border-top: 12px solid white;
  z-index: 2;
}

/* Book Cover Components */
.book-cover-display {
  position: fixed;
  bottom: 120px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--glass-bg);
  border-radius: var(--border-radius-large);
  border-left: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-border);
  padding: 20px;
  max-width: 300px;
  z-index: 999;
  opacity: 0;
  transition: all var(--transition-medium);
  box-shadow: 20px 20px 40px -6px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(15px);
  text-align: center;
}

.book-cover-display.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.book-cover-display:hover {
  background: var(--glass-bg-hover);
  box-shadow: 20px 20px 60px 8px rgba(0, 0, 0, 0.25);
  transform: translateX(-50%) translateY(-2px);
}

.book-cover-container {
  text-align: center;
}

.book-cover-image {
  width: 100%;
  height: auto;
  max-height: 250px;
  border-radius: var(--border-radius-small);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
  margin-bottom: 10px;
  object-fit: cover;
}

.book-cover-loading {
  width: 170px;
  height: 220px;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--border-radius-small);
  margin-bottom: 10px;
}

.book-cover-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 8px;
  line-height: 1.3;
  font-family: system-ui, -apple-system, sans-serif;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.book-cover-author {
  font-size: 14px;
  color: var(--text-white);
  font-style: italic;
  font-family: system-ui, -apple-system, sans-serif;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

/* Multiple Books Display */
.multiple-books-display {
  position: fixed;
  bottom: 120px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--glass-bg);
  border-radius: var(--border-radius-large);
  border-left: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-border);
  padding: 20px;
  max-width: 80vw;
  opacity: 0;
  transition: all var(--transition-medium);
  z-index: 999;
  box-shadow: 20px 20px 40px -6px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(15px);
}

.multiple-books-display.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.multiple-books-display:hover {
  background: var(--glass-bg-hover);
  box-shadow: 20px 20px 60px 8px rgba(0, 0, 0, 0.25);
  transform: translateX(-50%) translateY(-2px);
}

.books-header {
  text-align: center;
  margin-bottom: 15px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-white);
  font-family: system-ui, -apple-system, sans-serif;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.books-grid {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  justify-content: center;
}

.book-item {
  text-align: center;
  max-width: 120px;
  transition: transform var(--transition-fast);
}

.book-item:hover {
  transform: translateY(-5px);
}

.book-item img {
  width: 100px;
  height: 140px;
  object-fit: cover;
  border-radius: var(--border-radius-small);
  margin-bottom: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
  transition: box-shadow var(--transition-fast);
}

.book-item:hover img {
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
}

.book-item .title {
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 4px;
  line-height: 1.2;
  color: var(--text-white);
  font-family: system-ui, -apple-system, sans-serif;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.4);
}

.book-item .author {
  font-size: 10px;
  color: var(--text-white-secondary);
  line-height: 1.2;
  font-style: italic;
  font-family: system-ui, -apple-system, sans-serif;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.4);
}

/* =============================================================================
   LINK BUTTONS COMPONENTS
   ============================================================================= */
.link-buttons-container {
  position: fixed;
  bottom: 250px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 1000;
  opacity: 0;
  transition: all var(--transition-medium);
  max-width: 90vw;
}

.link-buttons-container.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.link-button {
  background: var(--button-gradient);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-medium);
  padding: 16px 28px;
  color: var(--text-white);
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  backdrop-filter: blur(15px);
  box-shadow: var(--shadow-light);
  animation: slideInUp 0.3s ease-out forwards;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
  white-space: nowrap;
  min-width: 180px;
  text-align: center;
}

.link-button:hover {
  background: var(--button-gradient-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.link-button:active {
  transform: translateY(0);
  box-shadow: var(--shadow-light);
}

.link-button:focus {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* Scrollbar Components */
.chat-messages::-webkit-scrollbar, 
.controls-section::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-track, 
.controls-section::-webkit-scrollbar-track {
  background: rgba(255,255,255,0.1);
  border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb, 
.controls-section::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.3);
  border-radius: 3px;
}

/* =============================================================================
   UTILITIES - State classes and helpers
   ============================================================================= */

/* State utilities */
.u-hidden {
  display: none !important;
}

.loading-screen.hidden {
  opacity: 0;
  pointer-events: none;
}

.main-text-input:disabled {
  opacity: 0.6;
}

.mic-button:disabled,
.send-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.send-button:disabled {
  transform: none;
}

/* Animation utilities */
@keyframes pulse {
  0%, 100% { 
    opacity: 1; 
  }
  50% { 
    opacity: 0.5; 
  }
}

@keyframes shimmer {
  0% { 
    background-position: -200% 0; 
  }
  100% { 
    background-position: 200% 0; 
  }
}

@keyframes kb-pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.7;
    transform: scale(1.1);
  }
}

@keyframes kb-spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes kb-dots {
  0%, 20% {
    content: '';
  }
  40% {
    content: '.';
  }
  60% {
    content: '..';
  }
  80%, 100% {
    content: '...';
  }
}

@keyframes knowledge-fade-in {
  0% {
    opacity: 0;
    transform: translateX(-50%) translateY(-10px);
  }
  100% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* =============================================================================
   RESPONSIVE - Media queries
   ============================================================================= */
@media (max-width: 768px) {
  .chat-input-container {
    width: 95%;
    bottom: 20px;
  }
  
  .chat-input-form {
    padding: 10px;
    gap: 10px;
  }
  
  .main-text-input {
    font-size: 14px;
    padding: 10px 16px;
  }
  
  .input-icon-button {
    width: 40px;
    height: 40px;
  }
  
  .speech-bubble {
    max-width: 90%;
    top: 5px;
  }
  
  .speech-bubble-content {
    font-size: 16px;
    padding: 15px 20px;
    min-height: 50px;
    max-height: 90px;
  }
  
  .speech-bubble-content.speech-bubble-compact {
    font-size: 15px;
    padding: 14px 18px;
  }
  
  .speech-bubble-content.speech-bubble-small {
    font-size: 14px;
    padding: 12px 16px;
    max-height: 75px;
  }
  
  .book-cover-display {
    right: 20px;
    top: 40%;
  }
  
  .book-cover-container {
    max-width: 150px;
    padding: 10px;
  }
  
  .book-cover-image {
    max-height: 180px;
  }
  
  .book-cover-title {
    font-size: 12px;
  }
  
  .book-cover-author {
    font-size: 10px;
  }
  
  .multiple-books-display {
    bottom: 80px;
    max-width: 95vw;
    padding: 15px;
  }
  
  .books-header {
    font-size: 14px;
    margin-bottom: 12px;
  }
  
  .books-grid {
    gap: 10px;
  }
  
  .book-item {
    max-width: 100px;
  }
  
  .book-item img {
    width: 80px;
    height: 110px;
  }
  
  .book-item .title {
    font-size: 10px;
  }
  
  .book-item .author {
    font-size: 9px;
  }
  
  .knowledge-base-thinking {
    top: 10px;
    max-width: 280px;
    padding: 15px 20px;
  }
  
  .knowledge-base-thinking-content {
    font-size: 14px;
    padding: 15px 18px;
  }
  
  
  .events-thinking {
    top: 10px;
    max-width: 280px;
    padding: 15px 20px;
  }
  
  .events-thinking-content {
    font-size: 14px;
    padding: 15px 18px;
  }
  
  .kb-thinking-icon {
    font-size: 16px;
  }
  
  
  .events-thinking-icon {
    font-size: 16px;
  }
  
  .thinking-circle {
    width: 8px;
    height: 8px;
    border-width: 2px;
  }
  
  .thinking-circle:nth-child(2) {
    width: 6px;
    height: 6px;
    border-width: 1px;
  }
  
  .thinking-circle:nth-child(3) {
    width: 3px;
    height: 3px;
    border-width: 1px;
  }
  
  
  /* Link Buttons Mobile Styles */
  .link-buttons-container {
    bottom: 200px;
    max-width: 95vw;
  }
  
  .link-button {
    padding: 14px 20px;
    font-size: 15px;
    min-width: 160px;
  }
}

/* ================================ */
/* CONFETTI APPRECIATION SYSTEM CSS */
/* ================================ */
/* Triggers when user shows appreciation like "Thanks", "I love you", "You look good" */

/* Confetti container */
.confetti-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  overflow: hidden;
}

/* Customizable heart styling */
.heart {
  color: #ff1493;
  font-size: 2em;
  font-family: Arial, sans-serif;
  position: fixed;
  top: -10%;
  z-index: 9999;
  pointer-events: none;
}

/* Heart falling animation */
@keyframes hearts-fall {
  0% { top: -10%; }
  100% { top: 100%; }
}

/* Heart shaking animation */
@keyframes hearts-shake {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(80px); }
}

/* Apply animations to hearts */
.heart {
  animation-name: hearts-fall, hearts-shake;
  animation-duration: 4s, 1.5s;
  animation-timing-function: linear, ease-in-out;
  animation-iteration-count: 1, infinite;
  animation-play-state: running, running;
}

/* Staggered positions and delays for natural effect */
.heart:nth-of-type(1) { left: 5%; animation-delay: 0s, 0s; }
.heart:nth-of-type(2) { left: 15%; animation-delay: 0.5s, 0.2s; }
.heart:nth-of-type(3) { left: 25%; animation-delay: 1s, 0.4s; }
.heart:nth-of-type(4) { left: 35%; animation-delay: 0.3s, 0.6s; }
.heart:nth-of-type(5) { left: 45%; animation-delay: 0.8s, 0.8s; }
.heart:nth-of-type(6) { left: 55%; animation-delay: 0.2s, 1s; }
.heart:nth-of-type(7) { left: 65%; animation-delay: 0.6s, 0.3s; }
.heart:nth-of-type(8) { left: 75%; animation-delay: 0.4s, 0.7s; }
.heart:nth-of-type(9) { left: 85%; animation-delay: 0.9s, 0.1s; }
.heart:nth-of-type(10) { left: 95%; animation-delay: 0.7s, 0.5s; }

/* Alternative confetti styles (can switch between hearts, stars, etc.) */
.confetti-star {
  color: #ffd700;
  font-size: 1.8em;
}

.confetti-sparkle {
  color: #00ffff;
  font-size: 1.5em;
}

/* ================================ */
/* END CONFETTI SYSTEM CSS          */
/* ================================ */