/* =============================================================================
   MODERN AI VOICE ASSISTANT UI
   ============================================================================= */

:root {
  /* Color Palette */
  --primary-bg: #0a0a0f;
  --secondary-bg: #1a1a2e;
  --accent-bg: #16213e;
  --surface-bg: #1e1e2e;
  --glass-bg: rgba(255, 255, 255, 0.05);
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #b8bcc8;
  --text-muted: #6c7293;
  
  /* Accent Colors */
  --accent-blue: #00d4ff;
  --accent-green: #00ff88;
  --accent-red: #ff4757;
  --accent-orange: #ffa726;
  --accent-purple: #9c27b0;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  --gradient-success: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
  --gradient-error: linear-gradient(135deg, var(--accent-red), var(--accent-orange));
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
  
  /* Shadows */
  --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-strong: 0 16px 64px rgba(0, 0, 0, 0.5);
  --glow-blue: 0 0 30px rgba(0, 212, 255, 0.3);
  --glow-green: 0 0 30px rgba(0, 255, 136, 0.3);
  --glow-red: 0 0 30px rgba(255, 71, 87, 0.3);
  
  /* Animations */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =============================================================================
   GLOBAL STYLES
   ============================================================================= */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--primary-bg);
  color: var(--text-primary);
  overflow: hidden;
  height: 100vh;
  position: relative;
}

/* Animated Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(156, 39, 176, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(0, 255, 136, 0.05) 0%, transparent 50%);
  animation: backgroundShift 20s ease-in-out infinite;
  z-index: -1;
}

@keyframes backgroundShift {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(-20px, -20px) rotate(1deg); }
  66% { transform: translate(20px, 10px) rotate(-1deg); }
}

.hidden {
  display: none !important;
}

/* =============================================================================
   APP CONTAINER
   ============================================================================= */

.app-container {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: 2rem;
  position: relative;
}

/* =============================================================================
   ASSISTANT STATE DISPLAY
   ============================================================================= */

.assistant-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1;
  justify-content: center;
  margin-bottom: 2rem;
}

.state-avatar {
  margin-bottom: 2rem;
  position: relative;
}

.avatar-ring {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--gradient-glass);
  backdrop-filter: blur(20px);
  border: 2px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all var(--transition-medium);
  box-shadow: var(--shadow-medium);
}

.avatar-ring::before {
  content: '';
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border-radius: 50%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-medium);
  z-index: -1;
}

.avatar-ring.active::before {
  opacity: 1;
  animation: ringPulse 2s ease-in-out infinite;
}

.avatar-ring.listening::before {
  background: var(--gradient-success);
  opacity: 1;
  animation: ringPulse 1.5s ease-in-out infinite;
}

.avatar-ring.speaking::before {
  background: var(--gradient-primary);
  opacity: 1;
  animation: ringPulse 1s ease-in-out infinite;
}

.avatar-ring.error::before {
  background: var(--gradient-error);
  opacity: 1;
  animation: ringPulse 2s ease-in-out infinite;
}

@keyframes ringPulse {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.05); opacity: 1; }
}

.avatar-inner {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-soft);
  transition: all var(--transition-medium);
}

.avatar-inner i {
  font-size: 3rem;
  color: white;
  transition: all var(--transition-medium);
}

.avatar-ring.listening .avatar-inner {
  background: var(--gradient-success);
  animation: avatarBreathe 2s ease-in-out infinite;
}

.avatar-ring.speaking .avatar-inner {
  background: var(--gradient-primary);
  animation: avatarSpeak 0.5s ease-in-out infinite;
}

.avatar-ring.error .avatar-inner {
  background: var(--gradient-error);
}

@keyframes avatarBreathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

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

.state-info {
  max-width: 400px;
}

.assistant-name {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.state-status {
  margin-bottom: 2rem;
}

.status-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.status-pulse {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-blue);
  animation: statusPulse 2s ease-in-out infinite;
}

.status-pulse.listening {
  background: var(--accent-green);
  animation: statusPulse 1s ease-in-out infinite;
}

.status-pulse.speaking {
  background: var(--accent-blue);
  animation: statusPulse 0.5s ease-in-out infinite;
}

.status-pulse.error {
  background: var(--accent-red);
  animation: statusPulse 1.5s ease-in-out infinite;
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.status-text {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-medium);
}

/* =============================================================================
   AUDIO VISUALIZER
   ============================================================================= */

.audio-visualizer {
  margin-top: 1.5rem;
  transition: opacity var(--transition-medium);
}

.visualizer-bars {
  display: flex;
  align-items: end;
  justify-content: center;
  gap: 4px;
  height: 60px;
}

.bar {
  width: 4px;
  background: var(--gradient-success);
  border-radius: 2px;
  height: 10px;
  animation: visualizerPulse 1.5s ease-in-out infinite;
  transition: all var(--transition-fast);
}

.bar:nth-child(1) { animation-delay: 0s; }
.bar:nth-child(2) { animation-delay: 0.1s; }
.bar:nth-child(3) { animation-delay: 0.2s; }
.bar:nth-child(4) { animation-delay: 0.3s; }
.bar:nth-child(5) { animation-delay: 0.4s; }
.bar:nth-child(6) { animation-delay: 0.3s; }
.bar:nth-child(7) { animation-delay: 0.2s; }
.bar:nth-child(8) { animation-delay: 0.1s; }

@keyframes visualizerPulse {
  0%, 100% { height: 10px; }
  50% { height: 40px; }
}

.audio-visualizer.speaking .bar {
  background: var(--gradient-primary);
  animation: visualizerSpeak 0.3s ease-in-out infinite;
}

@keyframes visualizerSpeak {
  0%, 100% { height: 15px; }
  50% { height: 50px; }
}



/* =============================================================================
   CONTROL PANEL
   ============================================================================= */

.control-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  width: 100%;
  max-width: 500px;
}

.control-buttons {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.control-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 1.5rem 2rem;
  cursor: pointer;
  transition: all var(--transition-medium);
  box-shadow: var(--shadow-medium);
  min-width: 140px;
  position: relative;
  overflow: hidden;
}

.control-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left var(--transition-slow);
}

.control-btn:hover::before {
  left: 100%;
}

.control-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-strong);
}

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

.call-btn {
  border-color: rgba(0, 255, 136, 0.3);
}

.call-btn:hover {
  border-color: var(--accent-green);
  box-shadow: var(--glow-green), var(--shadow-strong);
}

.call-btn.active {
  background: rgba(0, 255, 136, 0.1);
  border-color: var(--accent-green);
  box-shadow: var(--glow-green);
}

.hangup-btn {
  border-color: rgba(255, 71, 87, 0.3);
}

.hangup-btn:hover:not(.disabled) {
  border-color: var(--accent-red);
  box-shadow: var(--glow-red), var(--shadow-strong);
}

.hangup-btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-medium);
  box-shadow: var(--shadow-soft);
}

.call-btn .btn-icon {
  background: var(--gradient-success);
}

.hangup-btn .btn-icon {
  background: var(--gradient-error);
}

.btn-icon i {
  font-size: 1.5rem;
  color: white;
  transition: all var(--transition-medium);
}

.control-btn:hover .btn-icon {
  transform: scale(1.1);
}

.btn-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-medium);
}

.control-btn:hover .btn-label {
  color: var(--text-primary);
}



/* =============================================================================
   LOADING STATES
   ============================================================================= */

.loading .btn-icon i {
  animation: spin 1s linear infinite;
}

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

/* =============================================================================
   RESPONSIVE DESIGN
   ============================================================================= */

@media (max-width: 768px) {
  .app-container {
    padding: 1rem;
  }
  
  .avatar-ring {
    width: 150px;
    height: 150px;
  }
  
  .avatar-inner {
    width: 90px;
    height: 90px;
  }
  
  .avatar-inner i {
    font-size: 2rem;
  }
  
  .assistant-name {
    font-size: 2rem;
  }
  
  .control-buttons {
    gap: 1rem;
  }
  
  .control-btn {
    min-width: 120px;
    padding: 1.25rem 1.5rem;
  }
  
  .btn-icon {
    width: 50px;
    height: 50px;
  }
  
  .btn-icon i {
    font-size: 1.25rem;
  }
  
  .chat-messages {
    left: 1rem;
    right: 1rem;
    bottom: 180px;
  }
}

@media (max-width: 480px) {
  .control-buttons {
    flex-direction: column;
    gap: 1rem;
  }
  
  .control-btn {
    width: 100%;
    max-width: 200px;
  }
}

/* =============================================================================
   AUTHENTICATION STYLES
   ============================================================================= */

.auth-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: opacity var(--transition-medium);
}

.auth-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.auth-container {
  width: 100%;
  max-width: 400px;
  padding: 2rem;
  position: relative;
}

.auth-form {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: var(--shadow-strong);
  transition: all var(--transition-medium);
}

.auth-form.hidden {
  display: none;
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.5;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.form-group input {
  width: 100%;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-medium);
  backdrop-filter: blur(10px);
}

.form-group input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.auth-btn {
  width: 100%;
  padding: 1rem 1.5rem;
  background: var(--gradient-primary);
  border: none;
  border-radius: 12px;
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-medium);
  box-shadow: var(--shadow-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.auth-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-strong), var(--glow-blue);
}

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

.auth-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.auth-btn.loading {
  pointer-events: none;
}

.auth-btn.loading i {
  animation: spin 1s linear infinite;
}

.auth-links {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.auth-links a {
  color: var(--accent-blue);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.auth-links a:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

.auth-message {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 8px;
  text-align: center;
  font-size: 0.9rem;
  transition: all var(--transition-medium);
}

.auth-message.success {
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid rgba(0, 255, 136, 0.3);
  color: var(--accent-green);
}

.auth-message.error {
  background: rgba(255, 71, 87, 0.1);
  border: 1px solid rgba(255, 71, 87, 0.3);
  color: var(--accent-red);
}

.auth-message.info {
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--accent-blue);
}

.auth-message.hidden {
  display: none;
}

/* User Info Styles */
.user-info {
  margin-top: 1.5rem;
  padding: 1rem;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  text-align: center;
}

.user-info.hidden {
  display: none;
}

.user-details {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.user-name {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.9rem;
}

.logout-btn {
  background: rgba(255, 71, 87, 0.1);
  border: 1px solid rgba(255, 71, 87, 0.3);
  border-radius: 8px;
  color: var(--accent-red);
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logout-btn:hover {
  background: rgba(255, 71, 87, 0.2);
  border-color: var(--accent-red);
}

/* Authentication Responsive Design */
@media (max-width: 768px) {
  .auth-container {
    padding: 1rem;
  }
  
  .auth-form {
    padding: 2rem;
  }
  
  .auth-header h2 {
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
  .auth-form {
    padding: 1.5rem;
  }
  
  .auth-header h2 {
    font-size: 1.5rem;
  }
  
  .user-details {
    flex-direction: column;
    gap: 0.75rem;
  }
}