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

:root {
  --bg-primary: #0f0f0f;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #252525;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --user-bubble: #6366f1;
  --ai-bubble: #1e1e1e;
  --border: #2a2a2a;
  --success: #22c55e;
  --error: #ef4444;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  height: 100dvh;
  overflow: hidden;
}

.app-container {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  max-width: 600px;
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.settings-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 20px;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: all 0.2s;
}

.settings-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.chat-container {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scroll-behavior: smooth;
}

.message {
  display: flex;
  flex-direction: column;
  max-width: 85%;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

.message-label {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 4px;
  padding: 0 4px;
}

.message.user .message-label {
  text-align: right;
}

.message-bubble {
  padding: 12px 16px;
  border-radius: 16px;
  line-height: 1.5;
  font-size: 14px;
  word-wrap: break-word;
}

.message.user .message-bubble {
  background: var(--user-bubble);
  border-bottom-right-radius: 4px;
}

.message.ai .message-bubble {
  background: var(--ai-bubble);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.input-container {
  padding: 16px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.input-wrapper {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

#messageInput {
  flex: 1;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  resize: none;
  max-height: 120px;
  min-height: 44px;
  line-height: 1.4;
  transition: border-color 0.2s;
}

#messageInput:focus {
  outline: none;
  border-color: var(--accent);
}

#messageInput::placeholder {
  color: var(--text-secondary);
}

.send-btn {
  width: 44px;
  height: 44px;
  background: var(--accent);
  border: none;
  border-radius: 12px;
  color: white;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  flex-shrink: 0;
}

.send-btn:hover {
  background: var(--accent-hover);
  transform: scale(1.05);
}

.send-btn:disabled {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: not-allowed;
  transform: none;
}

.send-btn svg {
  width: 20px;
  height: 20px;
}

.typing-indicator {
  display: flex;
  gap: 4px;
  padding: 8px 0;
}

.typing-dot {
  width: 6px;
  height: 6px;
  background: var(--text-secondary);
  border-radius: 50%;
  animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: 0s; }
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-6px); }
}

.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px;
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.empty-state h2 {
  color: var(--text-primary);
  font-size: 20px;
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 14px;
  line-height: 1.5;
}

.suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
  justify-content: center;
}

.suggestion-chip {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 8px 14px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.suggestion-chip:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--bg-secondary);
  border-radius: 16px;
  padding: 24px;
  width: 100%;
  max-width: 400px;
  border: 1px solid var(--border);
}

.modal h3 {
  margin-bottom: 16px;
  font-size: 18px;
}

.modal input {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  color: var(--text-primary);
  font-size: 14px;
  margin-bottom: 16px;
}

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

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.modal-actions button {
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.btn-cancel {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-save {
  background: var(--accent);
  color: white;
}

.btn-save:hover {
  background: var(--accent-hover);
}

.category-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
  margin-left: 8px;
}

.activity-item {
  background: var(--bg-tertiary);
  border-radius: 8px;
  padding: 12px;
  margin: 8px 0;
  border-left: 3px solid;
}

.activity-item .time {
  font-size: 12px;
  color: var(--text-secondary);
}

.activity-item .name {
  font-weight: 500;
  margin: 4px 0;
}

.analytics-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 8px 0;
}

.analytics-bar .label {
  width: 80px;
  font-size: 12px;
  color: var(--text-secondary);
}

.analytics-bar .bar {
  flex: 1;
  height: 20px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.analytics-bar .fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease;
}

.analytics-bar .value {
  font-size: 12px;
  width: 50px;
  text-align: right;
}

@media (max-width: 480px) {
  .message {
    max-width: 90%;
  }
  
  .suggestions {
    flex-direction: column;
  }
  
  .suggestion-chip {
    width: 100%;
    text-align: center;
  }
}