:root {
  color-scheme: dark;
  --bg: #090d16;
  --ink: #f3f4f6;
  --muted: #9ca3af;
  --border: rgba(255, 255, 255, 0.07);
  --border-focus: rgba(14, 165, 233, 0.5);
  --panel: rgba(15, 23, 42, 0.45);
  --panel-glass: rgba(15, 23, 42, 0.65);
  
  /* Color Palette - Cool Ice / Air Conditioning theme */
  --accent: #0ea5e9;       /* Cyan-500 */
  --accent-gradient: linear-gradient(135deg, #0ea5e9 0%, #2563eb 100%);
  --accent-glow: rgba(14, 165, 233, 0.3);
  
  --user-bg: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  --assistant-bg: rgba(30, 41, 59, 0.4);
  --danger: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.2);
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.2);
  --warning: #f59e0b;
  --warning-glow: rgba(245, 158, 11, 0.2);

  font-family: 'Plus Jakarta Sans', ui-sans-serif, system-ui, sans-serif;
}

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

html,
body {
  height: 100%;
  overflow: hidden;
  background-color: var(--bg);
}

body {
  background-image:
    radial-gradient(circle at 10% 20%, rgba(14, 165, 233, 0.06), transparent 35rem),
    radial-gradient(circle at 90% 80%, rgba(37, 99, 235, 0.06), transparent 35rem),
    radial-gradient(circle at 50% 50%, rgba(15, 23, 42, 0.5), transparent);
  color: var(--ink);
  display: flex;
  justify-content: center;
  align-items: center;
  -webkit-font-smoothing: antialiased;
}

.app-shell {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 580px;
  height: 100dvh;
  padding: 16px 16px 12px 16px;
  margin: 0 auto;
  position: relative;
  gap: 10px;
}

/* Avatar Stage */
.avatar-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  flex-shrink: 0;
}

.avatar-canvas {
  display: block;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(15, 23, 42, 0.8) 0%, rgba(9, 13, 22, 0.9) 100%);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

/* State-specific avatar glows (Dynamic UI) */
.app-shell[data-avatar-state="idle"] .avatar-canvas {
  border: 2px solid rgba(14, 165, 233, 0.25);
  box-shadow: 0 0 25px rgba(14, 165, 233, 0.12);
}

.app-shell[data-avatar-state="loading"] .avatar-canvas {
  border: 2px solid rgba(245, 158, 11, 0.3);
  box-shadow: 0 0 25px rgba(245, 158, 11, 0.15);
  animation: glow-pulse-loading 2s infinite ease-in-out;
}

.app-shell[data-avatar-state="thinking"] .avatar-canvas {
  border: 2px solid rgba(139, 92, 246, 0.5);
  box-shadow: 0 0 30px rgba(139, 92, 246, 0.3);
  animation: glow-pulse-thinking 1.5s infinite ease-in-out;
}

.app-shell[data-avatar-state="speaking"] .avatar-canvas {
  border: 2px solid rgba(16, 185, 129, 0.4);
  box-shadow: 0 0 35px rgba(16, 185, 129, 0.25);
  animation: glow-pulse-speaking 1.8s infinite ease-in-out;
}

.app-shell[data-avatar-state="responding"] .avatar-canvas {
  border: 2px solid rgba(14, 165, 233, 0.4);
  box-shadow: 0 0 35px rgba(14, 165, 233, 0.25);
  animation: glow-pulse-responding 1.8s infinite ease-in-out;
}

.app-shell[data-avatar-state="error"] .avatar-canvas {
  border: 2px solid rgba(239, 68, 68, 0.5);
  box-shadow: 0 0 30px rgba(239, 68, 68, 0.3);
}

.status-line {
  min-height: 24px;
  background: var(--panel-glass);
  border: 1px solid var(--border);
  border-radius: 99px;
  padding: 4px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.speaker-icon {
  display: none;
  line-height: 1;
  margin-right: 6px;
  color: var(--accent);
  animation: pulse-speaker 1s infinite alternate ease-in-out;
  filter: drop-shadow(0 0 5px var(--accent-glow));
}

.speaker-icon svg {
  display: block;
}

.app-shell[data-avatar-state="speaking"] .speaker-icon {
  display: inline-block;
}

#connectionStatus {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.app-shell[data-avatar-state="thinking"] #connectionStatus {
  color: #c084fc;
}

.app-shell[data-avatar-state="speaking"] #connectionStatus {
  color: var(--success);
}

.app-shell[data-avatar-state="responding"] #connectionStatus {
  color: var(--accent);
}

.app-shell[data-avatar-state="error"] #connectionStatus {
  color: var(--danger);
}

/* Messages Area */
.messages {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
  padding: 8px 4px;
  margin-bottom: 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.08) transparent;
}

/* Custom Scrollbar for messages */
.messages::-webkit-scrollbar {
  width: 4px;
}

.messages::-webkit-scrollbar-track {
  background: transparent;
}

.messages::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 99px;
}

.messages::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.15);
}

.empty-state {
  margin: auto;
  color: var(--muted);
  font-size: 0.88rem;
  text-align: center;
  max-width: 300px;
  line-height: 1.6;
  padding: 16px;
  background: rgba(15, 23, 42, 0.2);
  border: 1px dashed var(--border);
  border-radius: 16px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: fade-in 0.5s ease-out;
}

.message {
  display: flex;
  max-width: 85%;
  animation: slide-up 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.message.user {
  align-self: flex-end;
}

.message.assistant {
  align-self: flex-start;
}

.message.error {
  align-self: flex-start;
  max-width: 100%;
  width: 100%;
}

.bubble {
  border-radius: 16px;
  line-height: 1.5;
  overflow-wrap: anywhere;
  padding: 10px 14px;
  font-size: 0.9rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.bubble p {
  margin-bottom: 8px;
}

.bubble p:last-child {
  margin-bottom: 0;
}

.bubble ul,
.bubble ol {
  margin-left: 18px;
  margin-top: 4px;
  margin-bottom: 8px;
}

.bubble li {
  margin-bottom: 4px;
}

.bubble code {
  font-family: monospace;
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 4px;
  border-radius: 4px;
  font-size: 0.88em;
}

.bubble pre {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 10px;
  border-radius: 8px;
  overflow-x: auto;
  margin-top: 6px;
  margin-bottom: 8px;
}

.bubble pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
  font-size: 0.85rem;
}

.message.user .bubble {
  background: var(--user-bg);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom-right-radius: 4px;
  color: var(--ink);
}

.message.assistant .bubble {
  background: var(--assistant-bg);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
  color: var(--ink);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.message.error .bubble {
  background: rgba(239, 68, 68, 0.07);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: var(--danger);
  border-radius: 12px;
  text-shadow: 0 0 10px rgba(239, 68, 68, 0.1);
  width: 100%;
}

/* Composer Form */
.composer {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  padding: 5px 6px 5px 8px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--panel-glass);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  align-items: center;
  transition: all 0.3s ease;
  flex-shrink: 0;
  margin-bottom: 2px;
}

.composer button#micButton {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.composer button#micButton:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.08);
  color: var(--ink);
  transform: scale(1.05);
}

.composer button#micButton.listening {
  background: var(--danger);
  color: #fff;
  box-shadow: 0 4px 12px var(--danger-glow);
  animation: pulse-mic-red 1.2s infinite ease-in-out;
}

@keyframes pulse-mic-red {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 0 0 0px rgba(239, 68, 68, 0.45);
  }
  50% {
    transform: scale(1.06);
    box-shadow: 0 0 0 8px rgba(239, 68, 68, 0);
  }
}

.composer:focus-within {
  border-color: var(--border-focus);
  box-shadow: 
    0 10px 30px rgba(0, 0, 0, 0.3),
    0 0 0 3px rgba(14, 165, 233, 0.12);
}

.composer textarea {
  width: 100%;
  max-height: 120px;
  min-height: 38px;
  resize: none;
  border: 0;
  background: transparent;
  color: var(--ink);
  line-height: 1.4;
  outline: none;
  font-size: 0.92rem;
  padding: 8px 0;
}

.composer textarea::placeholder {
  color: var(--muted);
  opacity: 0.8;
}

.composer button {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border: 0;
  border-radius: 50%;
  background: var(--accent-gradient);
  color: #fff;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.composer button svg {
  display: block;
  transform: translate(1px, 0); /* slightly offset paperplane visual center */
  transition: transform 0.2s ease;
}

.composer button:hover:not(:disabled) {
  transform: scale(1.05);
  box-shadow: 
    0 6px 16px rgba(14, 165, 233, 0.35),
    0 0 10px rgba(14, 165, 233, 0.2);
}

.composer button:hover:not(:disabled) svg {
  transform: translate(2px, -1px) scale(1.05);
}

.composer button:active:not(:disabled) {
  transform: scale(0.95);
}

.composer button:disabled,
.composer textarea:disabled {
  cursor: not-allowed;
  opacity: 0.4;
  box-shadow: none;
}

/* Animations */
@keyframes pulse-speaker {
  from {
    transform: scale(0.85);
    opacity: 0.65;
  }
  to {
    transform: scale(1.15);
    opacity: 1;
  }
}

@keyframes glow-pulse-loading {
  0%, 100% {
    border-color: rgba(245, 158, 11, 0.2);
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.08);
  }
  50% {
    border-color: rgba(245, 158, 11, 0.5);
    box-shadow: 0 0 25px rgba(245, 158, 11, 0.25);
  }
}

@keyframes glow-pulse-thinking {
  0%, 100% {
    border-color: rgba(139, 92, 246, 0.35);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.15);
  }
  50% {
    border-color: rgba(139, 92, 246, 0.7);
    box-shadow: 0 0 35px rgba(139, 92, 246, 0.4);
  }
}

@keyframes glow-pulse-speaking {
  0%, 100% {
    border-color: rgba(16, 185, 129, 0.3);
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.12);
  }
  50% {
    border-color: rgba(16, 185, 129, 0.65);
    box-shadow: 0 0 35px rgba(16, 185, 129, 0.35);
  }
}

@keyframes glow-pulse-responding {
  0%, 100% {
    border-color: rgba(14, 165, 233, 0.3);
    box-shadow: 0 0 20px rgba(14, 165, 233, 0.12);
  }
  50% {
    border-color: rgba(14, 165, 233, 0.65);
    box-shadow: 0 0 35px rgba(14, 165, 233, 0.35);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive tweaks */
@media (max-width: 640px) {
  .app-shell {
    padding: 12px 12px 8px 12px;
  }

  .avatar-canvas {
    width: 120px;
    height: 120px;
  }

  .composer {
    padding: 4px 6px 4px 12px;
    border-radius: 22px;
  }

  .composer textarea {
    padding: 6px 0;
    font-size: 0.88rem;
  }
}