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

:root {
  --color-bg: #212121;
  --color-surface: #2f2f2f;
  --color-surface-2: #3a3a3a;
  --color-border: #4a4a4a;
  --color-primary: #7c6af7;
  --color-primary-hover: #6a58e6;
  --color-text: #ececec;
  --color-text-muted: #8e8ea0;
  --color-user-bubble: #2f2f2f;
  --color-ai-bubble: transparent;
  --color-error: #e06c75;
  --color-success: #98c379;
  --color-overlay: rgba(0, 0, 0, 0.6);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --radius: 18px;
  --radius-sm: 8px;
  --sidebar-width: 260px;
  --topbar-height: 52px;
}

/* ─── Light mode ─────────────────────────────── */
body.light-mode {
  --color-bg: #ffffff;
  --color-surface: #f4f4f4;
  --color-surface-2: #ebebeb;
  --color-border: #d9d9d9;
  --color-primary: #6054d4;
  --color-primary-hover: #4f44c0;
  --color-text: #0d0d0d;
  --color-text-muted: #6b6b80;
  --color-user-bubble: #f4f4f4;
  --color-ai-bubble: transparent;
  --color-error: #c0392b;
  --color-success: #27ae60;
  --color-overlay: rgba(0, 0, 0, 0.4);
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font);
  height: 100vh;
  display: flex;
  overflow: hidden;
}

/* ─── Sidebar ───────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: #171717;
  border-right: none;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  transition: transform 0.25s ease;
  z-index: 200;
}

.sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0.75rem 0.5rem;
  border-bottom: none;
}

.sidebar__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar__logo-icon {
  font-size: 1.2rem;
  color: var(--color-primary);
}

.sidebar__logo-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: #ececec;
  background: none;
  -webkit-background-clip: unset;
  -webkit-text-fill-color: unset;
  background-clip: unset;
}

.sidebar__close {
  background: none;
  border: none;
  color: #8e8ea0;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  display: none;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, background 0.2s;
}

.sidebar__close:hover {
  color: #ececec;
  background: #2a2a2a;
}

.sidebar__body {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.sidebar__section {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.sidebar__section-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  padding: 0 0.25rem;
}

.sidebar__footer {
  padding: 0.75rem 1rem;
  border-top: none;
}

.sidebar__footer-text {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ─── Chat list (sidebar) ───────────────────── */
.chat-list {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
}

.chat-list__empty {
  font-size: 0.8rem;
  color: #8e8ea0;
  text-align: center;
  padding: 0.5rem 0.25rem;
}

.chat-list__item {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.7rem;
  font-size: 0.85rem;
  color: #c5c5d2;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-family: var(--font);
}

.chat-list__item:hover {
  background: #2a2a2a;
  color: #ececec;
}

.chat-list__item.is-active {
  background: #2a2a2a;
  color: #ececec;
  border-left: none;
  padding-left: 0.7rem;
}

.chat-list__title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-list__delete {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  opacity: 0;
  padding: 0 0.15rem;
  font-size: 1rem;
  line-height: 1;
  border-radius: 3px;
  transition: opacity 0.15s, color 0.15s;
  flex-shrink: 0;
  font-family: var(--font);
}

.chat-list__item:hover .chat-list__delete {
  opacity: 1;
}

.chat-list__delete:hover {
  color: var(--color-error);
}

/* ─── Settings info text ─────────────────────── */
.settings-info {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.settings-info code {
  font-family: monospace;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  padding: 0.05rem 0.3rem;
  font-size: 0.8rem;
}

/* ─── Settings form fields ─────────────────── */
.settings-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.settings-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text);
}

.settings-optional {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.settings-input {
  width: 100%;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font);
  font-size: 0.87rem;
  padding: 0.45rem 0.7rem;
  outline: none;
  transition: border-color 0.2s;
}

select.settings-input {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23888' width='16' height='16'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  padding-right: 2rem;
  cursor: pointer;
}

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

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

.settings-textarea {
  resize: vertical;
  min-height: 72px;
  line-height: 1.5;
}

/* ─── Sidebar overlay (mobile) ──────────────── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 100;
}

/* ─── Settings modal ─────────────────────────── */
.settings-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  z-index: 500;
  align-items: center;
  justify-content: center;
}

.settings-overlay.is-open {
  display: flex;
}

.settings-modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 420px;
  max-height: 85vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.2s ease;
  margin: 1rem;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.settings-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem 0.85rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.settings-modal__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}

.settings-modal__close {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, background 0.2s;
}

.settings-modal__close:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

.settings-modal__body {
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.settings-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.settings-section__title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.settings-row__label {
  font-size: 0.87rem;
  color: var(--color-text);
  font-weight: 500;
}

/* ─── Theme toggle ───────────────────────────── */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle__label {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
  cursor: pointer;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-switch__track {
  position: absolute;
  inset: 0;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 11px;
  transition: background 0.2s, border-color 0.2s;
}

.toggle-switch__track::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  background: var(--color-text-muted);
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: transform 0.2s, background 0.2s;
}

.toggle-switch input:checked + .toggle-switch__track {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.toggle-switch input:checked + .toggle-switch__track::after {
  transform: translateX(18px);
  background: #fff;
}

/* ─── Main content ───────────────────────────── */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  min-width: 0;
}

/* ─── Topbar ─────────────────────────────────── */
.topbar {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 1.25rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  background: var(--color-bg);
}

.topbar__menu-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.3rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, background 0.2s;
  display: none;
}

.topbar__menu-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

.topbar__title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-muted);
  display: none;
}

.topbar__spacer {
  flex: 1;
}

.topbar__icon-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.3rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, background 0.2s;
}

.topbar__icon-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

/* ─── Chat Window ────────────────────────────── */
.chat-window {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 2rem 1.5rem 0.5rem;
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  align-self: stretch;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.chat-window::-webkit-scrollbar {
  width: 5px;
}

.chat-window::-webkit-scrollbar-track {
  background: transparent;
}

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

/* ─── Messages ───────────────────────────────── */
.message {
  display: flex;
  gap: 0.75rem;
  max-width: 100%;
  animation: fadeIn 0.2s ease;
  padding: 0.25rem 0;
}

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

.message--user {
  align-self: flex-end;
  flex-direction: row-reverse;
  max-width: 80%;
}

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

.message__avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  margin-top: 4px;
}

.message--user .message__avatar {
  background: var(--color-primary);
  color: #fff;
}

.message--ai .message__avatar {
  background: var(--color-surface-2);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.message__bubble {
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  font-size: 0.93rem;
  line-height: 1.65;
  word-break: break-word;
}

.message--user .message__bubble {
  background: var(--color-user-bubble);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  white-space: pre-wrap;
}

.message--ai .message__bubble {
  background: var(--color-ai-bubble);
  border: none;
  border-radius: 0;
  padding: 0;
  flex: 1;
}

/* ─── Generated image in chat ────────────────── */
.message__image {
  max-width: 100%;
  border-radius: var(--radius-sm);
  display: block;
}

/* ─── Message actions (copy, etc.) ──────────── */
.message__actions {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.6rem;
  padding-top: 0.1rem;
}

.msg-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  color: var(--color-text-muted);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.75rem;
  padding: 0.25rem 0.55rem;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}

.msg-action-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
  border-color: #666;
}

/* ─── Code block wrapper ─────────────────────── */
.code-block-wrapper {
  margin: 0.6em 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-surface-2);
  padding: 0.35rem 0.85rem;
  border-bottom: 1px solid var(--color-border);
}

.code-lang {
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: lowercase;
}

.code-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.75rem;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
  margin-left: auto;
}

.code-copy-btn:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.08);
}

.code-block-wrapper .md-pre {
  margin: 0;
  border: none;
  border-radius: 0;
}
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 0.25rem 0;
}

.typing-indicator span {
  width: 7px;
  height: 7px;
  background: var(--color-text-muted);
  border-radius: 50%;
  animation: bounce 1.3s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.18s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.36s; }

@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.35; }
  40%            { transform: translateY(-7px); opacity: 1; }
}

/* ─── Input area ─────────────────────────────── */
.input-area {
  padding: 0.75rem 1.5rem 1rem;
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  align-self: stretch;
  flex-shrink: 0;
}

.chat-form {
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 0.75rem 0.75rem 0.6rem;
  transition: border-color 0.2s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.chat-form:focus-within {
  border-color: #555;
}

.chat-form__input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-family: var(--font);
  font-size: 0.93rem;
  line-height: 1.5;
  resize: none;
  outline: none;
  max-height: 160px;
  overflow-y: hidden;
  scrollbar-width: thin;
  padding: 0 0.25rem;
}

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

.chat-form__actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.4rem;
}

.chat-form__modes {
  display: flex;
  gap: 0.35rem;
}

.input-area__hint {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 0.5rem;
}

.input-area__hint kbd {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.1rem 0.3rem;
  font-size: 0.7rem;
  font-family: var(--font);
}

/* ─── Buttons ────────────────────────────────── */
.btn {
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.87rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  transition: background 0.2s, opacity 0.2s;
  font-family: var(--font);
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

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

.btn--full {
  width: 100%;
}

.btn--new-chat {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: none;
  color: #ececec;
  border: 1px solid #3a3a3a;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: background 0.2s, border-color 0.2s;
}

.btn--new-chat:hover {
  background: #2a2a2a;
  border-color: #555;
  filter: none;
}

.btn--send {
  background: var(--color-primary);
  color: #fff;
  padding: 0.45rem;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

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

/* ─── Image mode button ──────────────────────── */
.btn--mode {
  background: none;
  color: var(--color-text-muted);
  padding: 0.3rem 0.6rem;
  height: 28px;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-shrink: 0;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  transition: color 0.2s, background 0.2s, border-color 0.2s;
  font-size: 0.78rem;
  font-weight: 500;
}

.btn--mode__label {
  font-size: 0.78rem;
  font-weight: 500;
}

.btn--mode:hover {
  color: var(--color-primary);
  background: var(--color-surface-2);
  border-color: var(--color-primary);
}

.btn--mode.is-active {
  color: var(--color-primary);
  background: var(--color-surface-2);
  border-color: var(--color-primary);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* ─── Empty state ────────────────────────────── */
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
  padding: 2rem;
}

.empty-state__icon {
  font-size: 2.5rem;
  margin-bottom: 0.25rem;
  opacity: 0.8;
}

.empty-state__title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.empty-state__desc {
  font-size: 0.88rem;
  max-width: 300px;
  line-height: 1.55;
}

/* ─── Microphone recording state ──────────────── */
.btn--mode.is-recording {
  color: var(--color-error);
  background: rgba(224, 108, 117, 0.12);
  border-color: var(--color-error);
  animation: mic-pulse 1.2s ease infinite;
}

@keyframes mic-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(224, 108, 117, 0); }
  50%       { box-shadow: 0 0 0 4px rgba(224, 108, 117, 0.25); }
}

/* ─── Markdown rendered content ─────────────── */
.md-content {
  white-space: normal;
}

.md-content .md-p {
  margin: 0.35em 0;
  line-height: 1.7;
}

.md-content .md-p:first-child { margin-top: 0; }
.md-content .md-p:last-child  { margin-bottom: 0; }

.md-content strong {
  font-weight: 700;
  color: var(--color-text);
}

.md-content em {
  font-style: italic;
}

.md-content del {
  text-decoration: line-through;
  opacity: 0.7;
}

.md-content .md-h1,
.md-content .md-h2,
.md-content .md-h3 {
  font-weight: 700;
  color: var(--color-text);
  margin: 0.75em 0 0.3em;
  line-height: 1.3;
}
.md-content .md-h1:first-child,
.md-content .md-h2:first-child,
.md-content .md-h3:first-child { margin-top: 0; }

.md-content .md-h1 { font-size: 1.2em; }
.md-content .md-h2 { font-size: 1.08em; }
.md-content .md-h3 { font-size: 0.97em; text-transform: uppercase; letter-spacing: 0.04em; }

.md-content .md-code {
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.1em 0.35em;
  font-size: 0.87em;
  color: var(--color-primary);
}

.md-content .md-pre {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  overflow-x: auto;
  margin: 0.6em 0;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.md-content .md-pre code {
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  font-size: 0.85em;
  line-height: 1.6;
  background: none;
  border: none;
  padding: 0;
  color: var(--color-text);
}

.md-content .md-blockquote {
  border-left: 3px solid var(--color-primary);
  margin: 0.5em 0;
  padding: 0.3em 0 0.3em 0.85em;
  color: var(--color-text-muted);
  font-style: italic;
}

.md-content .md-ul,
.md-content .md-ol {
  padding-left: 1.5em;
  margin: 0.4em 0;
}

.md-content .md-ul li,
.md-content .md-ol li {
  margin: 0.2em 0;
  line-height: 1.6;
}

.md-content .md-ul { list-style: disc; }
.md-content .md-ol { list-style: decimal; }

.md-content .md-hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 0.75em 0;
}

.md-content .md-link {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: transparent;
  transition: text-decoration-color 0.15s;
}

.md-content .md-link:hover {
  text-decoration-color: var(--color-primary);
}

/* ─── Models catalogue ───────────────────────── */
.models-catalogue {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.models-category {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.models-category__toggle {
  width: 100%;
  background: var(--color-surface-2);
  border: none;
  padding: 0.5rem 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: background 0.15s;
}

.models-category__toggle:hover {
  background: var(--color-border);
}

.models-category__icon {
  font-size: 0.95rem;
}

.models-category__name {
  flex: 1;
}

.models-category__chevron {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  transition: transform 0.2s;
}

.models-category__list {
  padding: 0.5rem 0.6rem 0.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  background: var(--color-surface);
}

.model-pill {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  white-space: nowrap;
}

.model-pill:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ─── Settings input flash (model selected) ─── */
@keyframes settings-flash {
  0%, 100% { border-color: var(--color-primary); }
  50%       { border-color: var(--color-success); box-shadow: 0 0 0 2px rgba(152, 195, 121, 0.25); }
}

.settings-input--flash {
  animation: settings-flash 0.6s ease;
}

/* ─── Reasoning block ────────────────────────── */

.reasoning-block {
  margin-bottom: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  font-size: 0.85rem;
}

.reasoning-block__toggle {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.75rem;
  background: var(--color-surface-2);
  cursor: pointer;
  list-style: none;
  user-select: none;
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
}

.reasoning-block__toggle::-webkit-details-marker {
  display: none;
}

.reasoning-block__toggle::before {
  content: '▸';
  font-size: 0.7rem;
  transition: transform 0.2s;
}

details[open] > .reasoning-block__toggle::before {
  transform: rotate(90deg);
}

.reasoning-block__content {
  padding: 0.6rem 0.85rem;
  background: var(--color-surface);
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  max-height: 18rem;
  overflow-y: auto;
}

/* ─── Responsive ─────────────────────────────── */
@media (max-width: 640px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-100%);
    width: min(var(--sidebar-width), 85vw);
  }

  .sidebar.is-open {
    transform: translateX(0);
  }

  .sidebar__close {
    display: flex;
  }

  .sidebar-overlay.is-visible {
    display: block;
  }

  .topbar__menu-btn,
  .topbar__title {
    display: flex;
  }

  .topbar {
    padding: 0 1rem;
    gap: 0.5rem;
  }

  .chat-window {
    padding: 0.75rem 0.75rem 0.5rem;
    gap: 0.35rem;
  }

  .input-area {
    padding: 0.4rem 0.75rem 0.6rem;
  }

  .message--user {
    max-width: 88%;
  }

  .message__bubble {
    font-size: 0.9rem;
  }

  /* Show short icon-only label with larger touch targets */
  .btn--mode__label {
    display: none;
  }

  .btn--mode {
    /* 40 × 40 px minimum touch target */
    width: 40px;
    height: 40px;
    padding: 0;
    justify-content: center;
    flex-shrink: 0;
  }

  .btn--mode svg {
    width: 16px;
    height: 16px;
  }

  .btn--send {
    width: 40px;
    height: 40px;
  }

  .chat-form {
    padding: 0.5rem 0.5rem 0.4rem;
  }

  .chat-form__actions {
    padding-top: 0.35rem;
  }

  .chat-form__modes {
    gap: 0.25rem;
  }

  .input-area__hint {
    display: none;
  }

  /* Settings modal takes more screen space on mobile */
  .settings-modal {
    max-height: 92vh;
    margin: 0.5rem;
    border-radius: var(--radius-sm);
  }
}

/* ─── Image preview (inside chat form) ──────── */
.image-preview-area {
  padding: 0.4rem 0.25rem 0;
}

.image-preview-wrapper {
  position: relative;
  display: inline-block;
}

.image-preview__img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  display: block;
}

.image-preview__remove {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 18px;
  height: 18px;
  background: var(--color-error);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  line-height: 1;
  transition: filter 0.15s;
}

.image-preview__remove:hover {
  filter: brightness(1.2);
}

/* ─── Image attachment menu ──────────────────── */
.image-btn-wrapper {
  position: relative;
}

.image-menu {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.3rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 152px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  z-index: 50;
  animation: slideUp 0.15s ease;
}

.image-menu[hidden] {
  display: none;
}

.image-menu__item {
  background: none;
  border: none;
  padding: 0.4rem 0.65rem;
  text-align: left;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.83rem;
  color: var(--color-text);
  font-family: var(--font);
  display: flex;
  align-items: center;
  gap: 0.45rem;
  transition: background 0.15s;
}

.image-menu__item:hover {
  background: var(--color-surface-2);
}

/* ─── Attached image in user message ─────────── */
.message__attached-image {
  max-width: 200px;
  max-height: 200px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  display: block;
  margin-bottom: 0.35rem;
}

/* ─── Camera modal ───────────────────────────── */
.camera-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.camera-modal-overlay[hidden] {
  display: none;
}

.camera-modal__box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 90vw;
  max-height: 90vh;
  animation: slideUp 0.2s ease;
}

.camera-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.camera-modal__title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.camera-modal__close {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, background 0.2s;
}

.camera-modal__close:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

.camera-modal__video {
  width: 100%;
  max-width: 480px;
  border-radius: var(--radius-sm);
  background: #000;
  display: block;
}

.camera-modal__actions {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}