:root {
  --bg-primary: #0f0f0f;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #252525;
  --bg-hover: #2a2a2a;
  --text-primary: #e5e5e5;
  --text-secondary: #a3a3a3;
  --text-muted: #737373;
  --accent-primary: #6366f1;
  --accent-secondary: #818cf8;
  --accent-success: #10b981;
  --accent-danger: #ef4444;
  --accent-warning: #f59e0b;
  --border-color: #333;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow: hidden;
}

#root {
  height: 100vh;
  width: 100vw;
}

.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  height: 56px;
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.novel-title-input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.5rem;
  border-radius: 0.375rem;
  width: 200px;
  transition: background-color 0.2s;
}

.novel-title-input:hover,
.novel-title-input:focus {
  background-color: var(--bg-tertiary);
  outline: none;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.model-select {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s;
}

.model-select:hover,
.model-select:focus {
  border-color: var(--accent-primary);
}

.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.sidebar-left {
  width: 280px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

.sidebar-left .sidebar-content {
  min-height: 0;
  flex: 1;
}

.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.sidebar-tab {
  flex: 1;
  padding: 0.75rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border-bottom: 2px solid transparent;
}

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

.sidebar-tab.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem;
}

.volume-item {
  margin-bottom: 0.5rem;
}

.volume-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background-color: var(--bg-tertiary);
  border-radius: 0.5rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

.volume-header:hover {
  background-color: var(--bg-hover);
}

.volume-title {
  font-weight: 600;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.chapter-list {
  padding-left: 1rem;
  margin-top: 0.25rem;
}

.chapter-item {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.125rem;
}

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

.chapter-item.active {
  background-color: var(--accent-primary);
  color: white;
}

.add-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.625rem;
  margin-top: 0.5rem;
  background-color: var(--bg-tertiary);
  border: 1px dashed var(--border-color);
  border-radius: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
}

.add-button:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background-color: rgba(99, 102, 241, 0.1);
}

.editor-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background-color: var(--bg-primary);
}

.editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.chapter-title-input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.125rem;
  font-weight: 600;
  padding: 0.5rem;
  border-radius: 0.375rem;
  flex: 1;
  max-width: 400px;
  transition: background-color 0.2s;
}

.chapter-title-input:hover,
.chapter-title-input:focus {
  background-color: var(--bg-tertiary);
  outline: none;
}

.editor-stats {
  display: flex;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.editor-textarea {
  flex: 1;
  width: 100%;
  padding: 1.5rem;
  background-color: var(--bg-primary);
  border: none;
  color: var(--text-primary);
  font-size: 1rem;
  line-height: 1.8;
  resize: none;
  outline: none;
  font-family: 'Georgia', serif;
  max-width: 900px;
  margin: 0 auto;
  display: block;
}

.editor-textarea::placeholder {
  color: var(--text-muted);
}

.sidebar-right {
  width: 360px;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

.chat-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.chat-header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 0;
}

.message {
  max-width: 90%;
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  font-size: 0.875rem;
  line-height: 1.5;
  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;
  background-color: var(--accent-primary);
  color: white;
  border-bottom-right-radius: 0.25rem;
}

.message.assistant {
  align-self: flex-start;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-bottom-left-radius: 0.25rem;
}

.chat-input-container {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
}

.chat-input-wrapper {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
}

.chat-input {
  flex: 1;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.75rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  resize: none;
  max-height: 120px;
  outline: none;
  transition: border-color 0.2s;
}

.chat-input:focus {
  border-color: var(--accent-primary);
}

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

.send-button {
  background-color: var(--accent-primary);
  border: none;
  border-radius: 0.5rem;
  padding: 0.75rem;
  color: white;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.send-button:hover:not(:disabled) {
  background-color: var(--accent-secondary);
}

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

.ollama-settings {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.setting-input {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  padding: 0.5rem;
  color: var(--text-primary);
  font-size: 0.75rem;
  flex: 1;
  min-width: 0;
}

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

.character-section {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.character-header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.character-graph {
  flex: 1;
  background-color: var(--bg-primary);
  position: relative;
}

.graph-legend {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.75rem;
  font-size: 0.75rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.legend-color {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  text-align: center;
  padding: 2rem;
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-state-text {
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease;
}

.modal {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.5rem;
  width: 100%;
  max-width: 400px;
  animation: slideUp 0.3s ease;
}

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

.modal-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.modal-input {
  width: 100%;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.75rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
  outline: none;
  transition: border-color 0.2s;
}

.modal-input:focus {
  border-color: var(--accent-primary);
}

.modal-select {
  width: 100%;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.75rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
  outline: none;
  cursor: pointer;
}

.modal-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  margin-top: 1rem;
}

.modal-button {
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
}

.modal-button.secondary {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.modal-button.primary {
  background-color: var(--accent-primary);
  border: none;
  color: white;
}

.modal-button:hover {
  transform: translateY(-1px);
}

.sidebar-left .sidebar-content {
  min-height: 0;
  flex: 1;
}

.character-list {
  padding: 0.75rem;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}

.character-card {
  background-color: var(--bg-tertiary);
  border-radius: 0.5rem;
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
}

.character-card:hover {
  background-color: var(--bg-hover);
}

.character-card.selected {
  border-color: var(--accent-primary);
}

.character-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.character-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 0.875rem;
}

.character-name {
  font-weight: 600;
  font-size: 0.875rem;
}

.character-role {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: capitalize;
}

.character-description {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.character-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.character-action-btn {
  flex: 1;
  padding: 0.375rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  color: var(--text-secondary);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.character-action-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.scrollbar-thin::-webkit-scrollbar {
  width: 6px;
}

.scrollbar-thin::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

.scrollbar-thin::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.scrollbar-thin::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

.word-count {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.typing-indicator {
  display: flex;
  gap: 4px;
  padding: 0.5rem;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background-color: var(--accent-primary);
  border-radius: 50%;
  animation: typing 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) {
  animation-delay: 0s;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing {
  0%, 60%, 100% {
    transform: translateY(0);
  }
  30% {
    transform: translateY(-10px);
  }
}

.context-indicator {
  font-size: 0.7rem;
  color: var(--accent-success);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.loading-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.context-modal-textarea {
  width: 100%;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.75rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  resize: none;
  outline: none;
  transition: border-color 0.2s;
}

.context-modal-textarea:focus {
  border-color: var(--accent-primary);
}

@media (max-width: 1200px) {
  .sidebar-left {
    width: 240px;
  }
  
  .sidebar-right {
    width: 320px;
  }
}

@media (max-width: 900px) {
  .sidebar-right {
    display: none;
  }
}