:root {
  --bg-deep: #0a0a0f;
  --bg-card: #12121a;
  --bg-elevated: #1a1a25;
  --border: #2a2a3a;
  --text: #e8e6e3;
  --text-muted: #8a8a9a;
  --accent: #c9a86c;
  --accent-dim: #9a7a4c;
  
  --chatgpt-color: #10a37f;
  --chatgpt-bg: rgba(16, 163, 127, 0.08);
  --claude-color: #d97706;
  --claude-bg: rgba(217, 119, 6, 0.08);
  --gemini-color: #4285f4;
  --gemini-bg: rgba(66, 133, 244, 0.08);
  --grok-color: #7c3aed;
  --grok-bg: rgba(124, 58, 237, 0.08);
  --user-color: #a855f7;
  --user-bg: rgba(168, 85, 247, 0.08);
}

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

body {
  font-family: 'Crimson Pro', Georgia, serif;
  background: var(--bg-deep);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  background-image: 
    radial-gradient(ellipse at 20% 0%, rgba(201, 168, 108, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(66, 133, 244, 0.03) 0%, transparent 50%);
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
header {
  text-align: center;
  padding: 1.5rem 0;
  position: relative;
}

header h1 {
  font-size: 2.5rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

header h1[role="button"] {
  cursor: pointer;
}

header h1[role="button"]:focus-visible {
  outline: 2px solid var(--accent-dim);
  outline-offset: 4px;
}

.subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  font-style: italic;
}

.header-actions {
  position: absolute;
  top: 1.5rem;
  right: 0;
  display: flex;
  gap: 0.5rem;
}

.header-token-counter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  border-radius: 999px;
  white-space: nowrap;
}

.header-action-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.5rem 0.9rem;
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}

.header-action-btn:hover {
  border-color: var(--accent-dim);
  color: var(--text);
}

#historyBtn {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dim) 100%);
  border-color: transparent;
  color: var(--bg-deep);
  font-weight: 600;
  box-shadow: 0 6px 14px rgba(201, 168, 108, 0.25);
}

#historyBtn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(201, 168, 108, 0.35);
}

#historyBtn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Keys Form */
.keys-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

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

.key-input {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.key-input label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.key-input input {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.6rem;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
}

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

.key-link {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.key-link:hover {
  color: var(--accent);
}

.save-keys {
  grid-column: 1 / -1;
  background: var(--accent);
  color: var(--bg-deep);
  border: none;
  padding: 0.6rem 1.5rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
  justify-self: start;
}

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

/* Conversation Section */
.conversation-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.conversation-thread {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 400px;
  max-height: calc(100vh - 350px);
  scroll-behavior: smooth;
}

.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-align: center;
  padding: 2rem;
}

.empty-state p {
  margin-bottom: 0.5rem;
}

.empty-state .hint {
  font-size: 0.9rem;
  opacity: 0.7;
}

/* Messages */
.message {
  display: flex;
  gap: 0.75rem;
  animation: fadeIn 0.3s ease;
}

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

.message-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.message.user .message-avatar {
  background: var(--user-bg);
  color: var(--user-color);
  border: 1px solid var(--user-color);
}

.message.chatgpt .message-avatar {
  background: var(--chatgpt-bg);
  color: var(--chatgpt-color);
  border: 1px solid var(--chatgpt-color);
}

.message.claude .message-avatar {
  background: var(--claude-bg);
  color: var(--claude-color);
  border: 1px solid var(--claude-color);
}

.message.gemini .message-avatar {
  background: var(--gemini-bg);
  color: var(--gemini-color);
  border: 1px solid var(--gemini-color);
}

.message.grok .message-avatar {
  background: var(--grok-bg);
  color: var(--grok-color);
  border: 1px solid var(--grok-color);
}

.message-content {
  flex: 1;
  min-width: 0;
}

.message-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.25rem;
}

.message-controls {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.message-meta {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  min-width: 0;
}

.message-sender {
  font-weight: 600;
  font-size: 0.95rem;
}

.message.user .message-sender { color: var(--user-color); }
.message.chatgpt .message-sender { color: var(--chatgpt-color); }
.message.claude .message-sender { color: var(--claude-color); }
.message.gemini .message-sender { color: var(--gemini-color); }
.message.grok .message-sender { color: var(--grok-color); }

.message-model {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}

.message-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.message-context {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  --context-accent: var(--accent);
  --context-percent: 0;
}

.message.chatgpt .message-context { --context-accent: var(--chatgpt-color); }
.message.claude .message-context { --context-accent: var(--claude-color); }
.message.gemini .message-context { --context-accent: var(--gemini-color); }
.message.grok .message-context { --context-accent: var(--grok-color); }

.message-context-spinner {
  width: 12px;
  height: 12px;
  border: 2px solid var(--border);
  border-top-color: var(--context-accent);
  border-radius: 50%;
  animation: contextSpin 0.9s linear infinite;
  display: none;
}

.message-context-bar {
  position: relative;
  width: 70px;
  height: 6px;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}

.message-context-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  width: calc(var(--context-percent) * 1%);
  background: var(--context-accent);
  transition: width 0.25s ease;
}

.message-context-percent {
  min-width: 3.2ch;
  text-align: right;
}

.message-context.is-loading .message-context-spinner {
  display: inline-block;
}

.message-context.is-loading .message-context-bar {
  display: none;
}

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

.message-action-btn {
  background: transparent;
  border: 0px solid var(--border);
  color: var(--text-muted);
  padding: 0.2rem 0.35rem;
  font-size: 0.65rem;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0.65;
}

.message-action-btn:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
  opacity: 1;
}

.message-body {
  background: var(--bg-elevated);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  line-height: 1.65;
}

.message-prompts {
  border: 1px dashed var(--border);
  background: var(--bg-deep);
  border-radius: 8px;
  padding: 0.35rem 0.5rem;
  margin-bottom: 0.5rem;
}

.message-prompts-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  width: 100%;
  padding: 0.25rem 0.35rem;
  background: transparent;
  border: 0;
  color: var(--text-muted);
  cursor: pointer;
  font-family: inherit;
  text-align: left;
}

.message-prompts-toggle:hover {
  color: var(--text);
}

.message-prompts-title {
  font-size: 0.70rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.message-prompts-toggle i {
  font-size: 0.85rem;
  transition: transform 0.2s ease;
}

.message-prompts.is-collapsed .message-prompts-body {
  display: none;
}

.message-prompts.is-collapsed .message-prompts-toggle i {
  transform: rotate(-90deg);
}

.message-prompts-body {
  padding: 0.2rem 0.35rem 0.35rem;
}

.message-prompt-section + .message-prompt-section {
  margin-top: 0.5rem;
}

.message-prompt-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.message-prompt-text {
  margin: 0;
  white-space: pre-wrap;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text);
}

.message.user .message-body {
  background: var(--user-bg);
  border: 1px solid rgba(168, 85, 247, 0.2);
}

.message-body.loading {
  color: var(--text-muted);
  font-style: italic;
}

.message-attachments {
  margin-bottom: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.message-attachment {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.3rem 0.55rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.message-attachment i {
  color: var(--accent);
}

.message-body.error {
  color: #e74c3c;
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid rgba(231, 76, 60, 0.2);
}

.error-summary {
  margin-bottom: 0.4rem;
}

.error-expand-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: transparent;
  border: 1px solid rgba(231, 76, 60, 0.4);
  border-radius: 4px;
  color: #e74c3c;
  font-size: 0.78rem;
  cursor: pointer;
  opacity: 0.8;
  transition: opacity 0.15s;
}

.error-expand-btn:hover {
  opacity: 1;
}

.error-details {
  margin-top: 0.5rem;
  padding: 0.5rem 0.6rem;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(231, 76, 60, 0.2);
  border-radius: 4px;
  font-size: 0.75rem;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 200px;
  overflow-y: auto;
  color: #c0392b;
}

.message-body pre {
  background: var(--bg-deep);
  padding: 0.75rem;
  border-radius: 4px;
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  margin: 0.75rem 0;
}

.message-body code {
  font-family: 'JetBrains Mono', monospace;
  background: var(--bg-deep);
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  font-size: 0.9em;
}

.message-body p {
  margin-bottom: 0.5rem;
}

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

.message-body pre code {
  background: none;
  padding: 0;
}

.message-body h1, .message-body h2, .message-body h3,
.message-body h4, .message-body h5, .message-body h6 {
  color: var(--accent);
  margin: 1rem 0 0.5rem;
  line-height: 1.3;
}

.message-body h1:first-child, .message-body h2:first-child,
.message-body h3:first-child {
  margin-top: 0;
}

.message-body h1 { font-size: 1.4rem; }
.message-body h2 { font-size: 1.25rem; }
.message-body h3 { font-size: 1.1rem; }
.message-body h4, .message-body h5, .message-body h6 { font-size: 1rem; }

.message-body ul, .message-body ol {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
}

.message-body li {
  margin-bottom: 0.25rem;
}

.message-body li:last-child {
  margin-bottom: 0;
}

.message-body blockquote {
  border-left: 3px solid var(--accent-dim);
  margin: 0.75rem 0;
  padding: 0.5rem 0 0.5rem 1rem;
  color: var(--text-muted);
  background: rgba(201, 168, 108, 0.05);
  border-radius: 0 4px 4px 0;
}

.message-body blockquote p {
  margin-bottom: 0;
}

.message-body a {
  color: var(--accent);
  text-decoration: none;
}

.message-body a:hover {
  text-decoration: underline;
}

.message-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 0.75rem 0;
  font-size: 0.9rem;
}

.message-body th, .message-body td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

.message-body th {
  background: var(--bg-deep);
  color: var(--accent);
  font-weight: 600;
}

.message-body tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

.message-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1rem 0;
}

.message-body img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

.message-edit {
  width: 100%;
  min-height: 110px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.6rem 0.75rem;
  border-radius: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  resize: vertical;
}

.message-edit:focus {
  outline: none;
  border-color: var(--accent-dim);
}

.message-edit-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.6rem;
}

.message-edit-btn {
  background: var(--accent);
  color: var(--bg-deep);
  border: none;
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}

.message-edit-btn:hover {
  background: var(--accent-dim);
}

.message-edit-btn.cancel {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.message-edit-btn.cancel:hover {
  border-color: var(--accent-dim);
  color: var(--text);
}

/* Input Area */
.input-area {
  border-top: 1px solid var(--border);
  padding: 1rem 1.25rem;
  background: var(--bg-elevated);
}

.input-row {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.model-selector-inline {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex-shrink: 0;
}

.model-selector-inline label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.model-toggle-row {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  color: var(--text);
  font-size: 0.82rem;
  text-transform: none;
  letter-spacing: normal;
  cursor: pointer;
}

.model-toggle-row input {
  accent-color: var(--accent);
  cursor: pointer;
}

.model-sequence {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 220px;
}

.model-sequence-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.5rem;
}

.model-sequence-index {
  font-size: 0.75rem;
  color: var(--text-muted);
  width: 1.25rem;
  text-align: center;
}

.model-sequence-select {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  min-width: 160px;
}

.model-sequence-select:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.model-sequence-select:focus {
  outline: none;
}

.model-sequence-actions {
  display: flex;
  gap: 0.25rem;
}

.model-sequence-btn {
  width: 28px;
  height: 28px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.model-sequence-btn:hover {
  border-color: var(--accent-dim);
  color: var(--text);
}

.model-sequence-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.model-add-btn {
  margin-top: 0.4rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: 0.45rem 0.6rem;
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.model-add-btn:hover {
  border-color: var(--accent-dim);
  color: var(--text);
}

.model-add-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.model-config-row {
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.model-config-duo {
  margin-top: 0.5rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.model-config-duo .model-config-row {
  margin-top: 0;
  width: 100%;
}

@media (max-width: 560px) {
  .model-config-duo {
    grid-template-columns: 1fr;
  }
}

.model-config-row input,
.model-config-row select {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.85rem;
  min-width: 120px;
}

.model-config-row input:disabled,
.model-config-row select:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.model-config-row input:focus,
.model-config-row select:focus {
  outline: none;
  border-color: var(--accent-dim);
}

.textarea-wrapper {
  position: relative;
  flex: 1;
  min-width: 0;
}

#messageInput {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.6rem 0.75rem;
  border-radius: 4px;
  font-family: inherit;
  font-size: 1rem;
  resize: none;
  min-height: 200px;
  padding-right: 3rem;
  padding-top: 0.9rem;
}

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

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

.input-attachment {
  position: absolute;
  top: 8px;
  right: 8px;
  display: inline-flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
  margin-top: 0;
  padding: 0;
  border: none;
  background: transparent;
  width: auto;
  max-width: calc(100% - 16px);
}

.attach-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 30px;
  height: 30px;
  padding: 0;
  font-size: 0.85rem;
  cursor: pointer;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.attach-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.attachment-list {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.25rem;
  max-width: 220px;
}

.attachment-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(10, 10, 15, 0.7);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.45rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  max-width: 100%;
}

.attachment-item span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 150px;
}

.attachment-remove-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0;
  cursor: pointer;
  font-size: 0.75rem;
  line-height: 1;
}

.attachment-remove-btn:hover {
  color: #e74c3c;
}

.input-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.75rem;
}

.export-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  cursor: pointer;
  opacity: 0.8;
  transition: all 0.2s;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.new-chat-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.55rem 1.1rem;
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}

.new-chat-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

#newChatBtn {
  background: linear-gradient(135deg, rgba(201, 168, 108, 0.2) 0%, rgba(201, 168, 108, 0.45) 100%);
  border-color: var(--accent-dim);
  color: var(--text);
  font-weight: 600;
  box-shadow: 0 4px 10px rgba(201, 168, 108, 0.2);
}

#newChatBtn:hover {
  color: var(--bg-deep);
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dim) 100%);
  transform: translateY(-1px);
  box-shadow: 0 8px 16px rgba(201, 168, 108, 0.3);
}

#newChatBtn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.export-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  opacity: 1;
}

.export-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.send-btn {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dim) 100%);
  color: var(--bg-deep);
  border: none;
  padding: 0.6rem 1.5rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}

.send-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(201, 168, 108, 0.25);
}

.send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* History Panel */
.history-panel {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-card);
  padding: 0.75rem 1rem 1rem;
  margin-bottom: 1rem;
}

.history-panel.hidden {
  display: none;
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 0.75rem;
}

.drive-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.25rem 0.65rem;
  font-family: inherit;
  font-size: 0.78rem;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
  white-space: nowrap;
}

.drive-btn:hover {
  border-color: var(--accent-dim);
  color: var(--text);
}

.drive-btn--connected {
  border-color: rgba(66, 133, 244, 0.5);
  color: #4285f4;
}

.drive-btn--connected:hover {
  border-color: rgba(66, 133, 244, 0.8);
  color: #6aa3f8;
  background: rgba(66, 133, 244, 0.06);
}


.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 220px;
  overflow-y: auto;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
}

.history-info {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.history-title-row {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.history-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  border: 1px solid rgba(201, 168, 108, 0.4);
  background: rgba(201, 168, 108, 0.08);
  white-space: nowrap;
}

.history-title {
  font-size: 0.95rem;
  color: var(--text);
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-rename-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.1rem 0.2rem;
  font-size: 0.7rem;
  transition: color 0.2s;
}

.history-rename-btn:hover {
  color: var(--accent);
}

.history-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.history-item-actions {
  display: flex;
  gap: 0.35rem;
}

.history-item-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.history-item-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.history-item-btn.delete:hover {
  color: #e74c3c;
  border-color: #e74c3c;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-elevated);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

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

/* Privacy Notice Footer */
.privacy-notice {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.privacy-notice p {
  margin: 0;
}

.privacy-notice strong {
  color: var(--text);
}

.privacy-notice a,
.privacy-link {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

.privacy-notice a:hover,
.privacy-link:hover {
  color: var(--accent-dim);
  text-decoration: underline;
}

/* Copyright Footer */
.copyright {
  text-align: center;
  padding: 1rem 0 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.copyright p {
  margin: 0;
}

.copyright a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.copyright a:hover {
  color: var(--accent);
}

/* Privacy Policy Page */
.privacy-page .home-link {
  color: var(--accent);
  text-decoration: none;
}

.privacy-page .home-link:hover {
  text-decoration: underline;
}

.privacy-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}

.privacy-content section {
  margin-bottom: 2rem;
}

.privacy-content section:last-child {
  margin-bottom: 0;
}

.privacy-content h2 {
  color: var(--accent);
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.privacy-content p {
  margin-bottom: 0.75rem;
}

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

.privacy-content ul,
.privacy-content ol {
  margin: 0.75rem 0;
  padding-left: 1.5rem;
}

.privacy-content li {
  margin-bottom: 0.5rem;
}

.privacy-content a {
  color: var(--accent);
  text-decoration: none;
}

.privacy-content a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 600px) {
  .container {
    padding: 1rem;
  }
  
  header h1 {
    font-size: 1.75rem;
  }
  
  .header-actions {
    position: static;
    margin-top: 1rem;
    justify-content: center;
  }
  
  .input-row {
    flex-direction: column;
  }
  
  .model-selector-inline {
    width: 100%;
  }
  
  .model-sequence {
    width: 100%;
  }

  .model-sequence-item {
    width: 100%;
  }

  .model-sequence-select {
    width: 100%;
  }

  .model-config-row {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
  }

  .model-config-row input,
  .model-config-row select {
    width: 100%;
  }
  
  .conversation-thread {
    min-height: 300px;
    max-height: calc(100vh - 400px);
  }
}