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

html, body {
  height: 100%;
  font-family: var(--font-family);
  background-color: var(--surface-1);
  color: var(--text-primary);
}

body {
  line-height: 1.6;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

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

button {
  cursor: pointer;
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--border-color);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: bold;
  font-size: 1.5rem;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: background-color var(--transition-speed);
}

.nav-link:hover {
  background-color: var(--bg-secondary);
}

.main-content {
  min-height: calc(100vh - 200px);
  padding: var(--spacing-lg) 0;
}

.footer {
  text-align: center;
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Card component */
.card {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.card-body {
  /* Content goes here */
}

/* Button styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xs) var(--spacing-md);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-speed);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  /* 不寫這行的話，當 .btn-primary 是 <a> 時，全站的 a:hover{color:...}
     規則（見上面）在 hover 時比 .btn-primary 的 base color 規則更精確，
     文字顏色會被搶成跟 background-color 一樣的 --color-primary-hover——
     實測發現按鈕 hover 時文字整個消失，就是這個原因 */
  color: var(--text-inverse);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--text-inverse);
}

.btn-secondary:hover {
  background-color: var(--color-secondary-hover);
  color: var(--text-inverse);
}

.btn-outline {
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

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

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.875rem;
}

.btn-lg {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 1.125rem;
}

/* Input styles */
.form-control {
  width: 100%;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 0.25rem color-mix(in srgb, var(--color-primary) 25%, transparent);
}

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

/* Chat specific styles */
.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 200px);
  max-width: var(--chat-max-width);
  margin: 0 auto;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.message-bubble {
  max-width: var(--message-max-width);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  word-wrap: break-word;
}

.message-bubble.user {
  align-self: flex-end;
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

.message-bubble.assistant {
  align-self: flex-start;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.message-meta {
  font-size: 0.75rem;
  opacity: 0.7;
  margin-top: var(--spacing-xs);
}

.chat-input-container {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.chat-input {
  flex: 1;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  resize: vertical;
  min-height: 48px;
}

.chat-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 0.25rem color-mix(in srgb, var(--color-primary) 25%, transparent);
}

.send-button {
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-primary);
  color: var(--text-inverse);
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  cursor: pointer;
  transition: background-color var(--transition-speed);
}

.send-button:hover {
  background-color: var(--color-primary-hover);
}

.send-button:disabled {
  background-color: var(--text-muted);
  cursor: not-allowed;
}

/* Session list */
.session-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.session-item {
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-speed);
}

.session-item:hover {
  background-color: var(--bg-secondary);
  border-color: var(--color-primary);
}

.session-item.active {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

.session-item.active .session-name {
  color: var(--text-inverse);
}

.session-name {
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.session-preview {
  font-size: 0.875rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Memory card */
.memory-card {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.memory-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.memory-card-header {
  padding: var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
}

.memory-card-title {
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.memory-importance {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
}

.importance-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.importance-1 { background-color: var(--color-success); }
.importance-2 { background-color: color-mix(in srgb, var(--color-success), var(--color-info)); }
.importance-3 { background-color: var(--color-info); }
.importance-4 { background-color: var(--color-warning); }
.importance-5 { background-color: var(--color-danger); }

.memory-card-body {
  padding: var(--spacing-md);
}

.memory-card-footer {
  padding: var(--spacing-sm);
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

/* Responsive */
@media (max-width: 768px) {
  .header {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .nav-links {
    flex-wrap: wrap;
  }

  .chat-container {
    height: calc(100vh - 160px);
  }

  .card, .memory-card {
    margin-bottom: var(--spacing-sm);
  }
}

/* Tool execution status messages */
.tool-message {
  max-width: var(--message-max-width);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  word-wrap: break-word;
  border: 1px solid var(--border-color);
}

.tool-message.loading {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  align-self: flex-start;
}

.tool-message.success {
  background-color: var(--color-success);
  color: var(--text-inverse);
  align-self: flex-start;
}

.tool-message.error {
  background-color: var(--color-danger);
  color: var(--text-inverse);
  align-self: flex-start;
}

.tool-message-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
}

.tool-message-name {
  font-family: monospace;
  font-size: 0.8rem;
  padding: 2px 6px;
  border-radius: 4px;
  background-color: rgba(0,0,0,0.1);
}

.tool-message.loading .tool-message-name {
  background-color: rgba(0,0,0,0.1);
}

.tool-message.success .tool-message-name {
  background-color: rgba(255,255,255,0.2);
}

.tool-message.error .tool-message-name {
  background-color: rgba(255,255,255,0.2);
}

.tool-message-status {
  font-size: 0.75rem;
  opacity: 0.8;
}

.tool-message.loading .tool-message-status::before {
  content: '⏳';
  margin-right: 4px;
}

.tool-message.success .tool-message-status::before {
  content: '✅';
  margin-right: 4px;
}

.tool-message.error .tool-message-status::before {
  content: '❌';
  margin-right: 4px;
}

.tool-message-result {
  font-family: monospace;
  font-size: 0.75rem;
  white-space: pre-wrap;
  word-break: break-word;
  margin-top: var(--spacing-xs);
  padding: var(--spacing-xs);
  background-color: rgba(0,0,0,0.05);
  border-radius: 4px;
}

.tool-message.success .tool-message-result {
  background-color: rgba(255,255,255,0.15);
}

.tool-message.error .tool-message-result {
  background-color: rgba(255,255,255,0.15);
}

/* TTS Button */
.tts-button {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  padding: var(--spacing-xs);
  margin-right: var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: all var(--transition-speed);
  opacity: 0.7;
}

.tts-button:hover {
  opacity: 1;
  background-color: var(--bg-tertiary);
  transform: scale(1.1);
}

.tts-button.playing {
  opacity: 1;
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

.tts-button:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-primary);
}

.message-meta {
  display: flex;
  align-items: center;
  font-size: 0.75rem;
  opacity: 0.7;
  margin-top: var(--spacing-xs);
}

/* Chat header actions */
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.chat-header-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* Export menu */
.export-menu {
  position: fixed;
  z-index: var(--z-toast);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xs);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  min-width: 160px;
}

.export-menu button {
  background: none;
  border: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 0.875rem;
  text-align: left;
  color: var(--text-primary);
  transition: background-color var(--transition-speed);
  width: 100%;
}

.export-menu button:hover {
  background-color: var(--bg-tertiary);
}

/* Utility classes for extracted inline styles */
.chat-attachment-input { display: none; }
.chat-flex-gap { display: flex; gap: var(--spacing-xs); }
.theme-preview-primary { background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover)); }
.theme-preview-surface { background: linear-gradient(135deg, var(--surface-2), var(--surface-3)); }

/* Shared details for the cottage pages. Page-specific accent colors remain intact. */
.app-shell {
  background-image: radial-gradient(ellipse at 50% -20%, rgba(255,253,247,.65), transparent 64%);
}
.app-shell .header {
  background: var(--surface-0);
  border-bottom-color: var(--border-default);
  box-shadow: 0 2px 12px rgba(70,52,32,.04);
}
.app-shell .app-name { letter-spacing: .035em; }
.app-shell .page-header {
  position: relative;
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-default);
}
.app-shell .page-title { letter-spacing: .01em; line-height: 1.25; }
.app-shell .page-intro { line-height: var(--leading-relaxed); }
.app-shell :is(input, textarea, select):not([type="checkbox"]):not([type="radio"]):not([type="hidden"]) {
  background-color: var(--surface-0);
  color: var(--text-primary);
  border-color: var(--border-default);
}
.app-shell :is(input, textarea, select):focus-visible {
  outline: 2px solid var(--color-terracotta-dark);
  outline-offset: 2px;
}
.app-shell :is(.diary-card, .dream-card, .memory-card, .moment-item, .mail-card, .heart-card) {
  border-color: var(--border-default);
  box-shadow: inset 0 0 0 3px var(--surface-0), var(--shadow-sm);
}
[data-theme="dark"] .app-shell { background-image: none; }
@media (max-width: 767px) {
  .app-shell .main-content { padding-inline: clamp(14px, 4vw, 24px); }
  .app-shell .page-header { margin-bottom: var(--spacing-lg); }
}