frontend/src/styles/components.css

/* ── Sidebar: LLM Selector ─────────────────────────────────────── */

.sidebar-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent-primary);
  margin: 0;
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.selector-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--border-primary);
  margin: 0;
}

.selector-title-icon {
  height: 16px;
  width: auto;
}

.provider-group {
  margin-bottom: 0;
  border: 1px solid var(--border-primary);
  border-radius: 8px;
  overflow: hidden;
}

.provider-group.comp-group {
  background: var(--comp-bg);
}

/* ── Neon model cards (matching LLMComparisons) ──────────────────── */

.neon-model-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.neon-model-card {
  border: 1px solid var(--neon-border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--neon-bg);
}

.neon-model-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 10px 12px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 13px;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s;
}

.neon-model-header:hover {
  background: var(--card-hover);
}

.neon-model-info {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.neon-model-name {
  font-weight: 600;
  text-transform: capitalize;
}

.neon-model-version {
  font-size: 11px;
  color: var(--text-muted);
}

.neon-model-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-tertiary);
}

.badge.badge-neon {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 700;
  background: var(--neon-bg);
  color: var(--text-primary);
  border: 1px solid var(--neon-border);
}

.neon-persona-list {
  border-top: 1px solid var(--border-muted);
  padding: 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.neon-persona-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
  padding: 8px;
  border-radius: 6px;
  border: none;
  background: none;
  color: var(--text-primary);
  cursor: pointer;
  text-align: left;
  transition: background 0.15s;
}

.neon-persona-item:hover {
  background: var(--card-hover);
}

.persona-details {
  flex: 1;
  min-width: 0;
}

.persona-name-row {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  text-transform: capitalize;
}

.persona-prompt-preview {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.4;
  margin-top: 2px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.provider-accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-width: 0;
  padding: 10px 12px;
  border: none;
  background: none;
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  transition: background 0.15s;
}

.provider-accordion-header:hover {
  background: var(--card-hover);
}

.provider-accordion-title {
  flex: 1;
  min-width: 0;
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.provider-accordion-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-tertiary);
}

.provider-model-count {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-primary);
  background: var(--accent-light);
  padding: 1px 6px;
  border-radius: 10px;
}

.provider-group .model-list {
  padding: 4px;
  border-top: 1px solid var(--border-muted);
}

.model-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.model-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  min-width: 0;
  padding: 6px 10px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: none;
  color: var(--text-primary);
  font-size: 13px;
  transition: all 0.15s;
  text-align: left;
}

.model-btn:hover {
  background: var(--card-hover);
}

.model-btn .model-name {
  flex: 1;
  min-width: 0;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.model-btn .model-params {
  font-size: 10px;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

/* Selection indicator: circle */
.select-indicator {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--text-secondary);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.15s;
  position: relative;
}

.select-indicator.selected-a {
  border-color: var(--speaker-a-color);
  background: var(--speaker-a-color);
}

.select-indicator.selected-b {
  border-color: var(--speaker-b-color);
  background: var(--speaker-b-color);
}

/* Double-select ring for "same LLM both sides" */
.select-indicator.double-selected {
  box-shadow: 0 0 0 3px var(--card-bg), 0 0 0 5px var(--speaker-a-color);
  border-color: var(--speaker-b-color);
  background: linear-gradient(135deg, var(--speaker-a-color), var(--speaker-b-color));
}

.selection-label {
  font-size: 10px;
  font-weight: 700;
  color: #fff;
}


/* ── Accordion ─────────────────────────────────────────────────── */

.accordion {
  border: 1px solid var(--border-primary);
  border-radius: 12px;
  background: var(--card-bg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin-bottom: 16px;
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--bg-secondary);
  border: none;
  width: 100%;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  transition: background 0.15s;
}

.accordion-header:hover {
  background: var(--bg-tertiary);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 20px;
}

.accordion-body.open {
  max-height: calc(100vh - 260px);
  overflow-y: auto;
  padding: 16px 20px 20px;
}

.persona-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.persona-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.persona-panel-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-primary);
}

.persona-panel:first-child .persona-panel-header {
  border-color: var(--speaker-a-color);
}

.persona-panel:last-child .persona-panel-header {
  border-color: var(--speaker-b-color);
}

.persona-field label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.persona-field input,
.persona-field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-primary);
  border-radius: 8px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 13px;
  transition: border-color 0.15s;
  resize: vertical;
}

.persona-field input:focus,
.persona-field textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.persona-field textarea {
  min-height: 80px;
}

.persona-field textarea.tall {
  min-height: 120px;
}

.persona-field input::placeholder,
.persona-field textarea::placeholder {
  color: var(--text-muted);
  font-style: italic;
}

.freeform-label-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.freeform-label-row label {
  flex: 1;
}

.upload-btn {
  flex-shrink: 0;
}

.freeform-textarea {
  min-height: 260px;
  resize: vertical;
}

/* responsive rules consolidated below */

/* ── Chat Area ─────────────────────────────────────────────────── */

.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px 0;
  overflow-y: auto;
}

.chat-empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 15px;
  font-style: italic;
}

/* ── Message Bubbles ───────────────────────────────────────────── */

.message-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
  animation: fadeSlideIn 0.3s ease;
}

.message-row.speaker-a {
  flex-direction: row;
}

.message-row.speaker-b {
  flex-direction: row-reverse;
}

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

/* Geometric shape avatars */
.avatar {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: #fff;
}

.avatar-a {
  background: var(--speaker-a-color);
  border-radius: 50%;
}

.avatar-b {
  background: var(--speaker-b-color);
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.message-bubble {
  max-width: min(520px, 85%);
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.6;
  box-shadow: var(--shadow-sm);
  overflow-wrap: break-word;
  word-break: break-word;
}

.message-bubble.bubble-a {
  background: var(--speaker-a-bg);
  color: var(--text-primary);
  border: 1px solid color-mix(in srgb, var(--speaker-a-color) 20%, transparent);
  border-bottom-left-radius: 4px;
}

.message-bubble.bubble-b {
  background: var(--speaker-b-bg);
  color: var(--text-primary);
  border: 1px solid color-mix(in srgb, var(--speaker-b-color) 20%, transparent);
  border-bottom-right-radius: 4px;
}

.message-speaker {
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.speaker-a .message-speaker {
  color: var(--speaker-a-color);
}

.speaker-b .message-speaker {
  color: var(--speaker-b-color);
}

.message-bubble p {
  margin: 0 0 8px;
}

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

.message-elapsed {
  margin-top: 6px;
  font-size: 11px;
  color: var(--text-muted);
  text-align: right;
  opacity: 0.7;
}

/* System messages */
.system-message {
  text-align: center;
  padding: 12px;
  color: var(--text-muted);
  font-style: italic;
  font-size: 14px;
}

.system-message.end-of-chat {
  font-weight: 700;
  font-style: normal;
  color: var(--text-secondary);
  font-size: 16px;
  padding: 20px;
  border-top: 1px solid var(--border-primary);
  margin-top: 8px;
}

.chat-stats {
  text-align: center;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border-radius: 8px;
  margin: 4px auto 8px;
  max-width: 400px;
}

/* ── Chat Controls ─────────────────────────────────────────────── */

.chat-controls {
  display: flex;
  gap: 12px;
  align-items: stretch;
  padding: 12px 0;
}

.chat-controls input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border-primary);
  border-radius: 8px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
}

.chat-controls input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.btn-primary {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  background: var(--accent-gradient);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: opacity 0.15s, transform 0.1s;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-primary:active {
  transform: scale(0.97);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  padding: 10px 20px;
  border: 1px solid var(--border-primary);
  border-radius: 8px;
  background: var(--bg-primary);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.15s;
}

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

.btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-stop {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  background: #DC2626;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: opacity 0.15s, transform 0.1s;
}

.btn-stop:hover {
  opacity: 0.9;
}

.btn-stop:active {
  transform: scale(0.97);
}

/* ── Header Dev Menu ───────────────────────────────────────────── */

.dev-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dev-download-btns {
  display: flex;
  gap: 6px;
}

.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
}

.btn-outline {
  border: 1px solid var(--border-primary);
  background: var(--card-bg);
  color: var(--text-secondary);
  transition: border-color 0.15s;
}

.btn-outline:hover:not(:disabled) {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

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

.btn-ghost {
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  transition: background 0.15s;
}

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


.dev-dropdown-header {
  position: relative;
}

.dev-panel {
  position: absolute;
  right: 0;
  top: 100%;
  margin-top: 4px;
  min-width: 220px;
  background: var(--card-bg);
  border: 1px solid var(--border-primary);
  border-radius: 10px;
  padding: 6px;
  z-index: 50;
  box-shadow: var(--shadow-md);
}

.dev-panel button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 10px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: background 0.1s;
}

.dev-panel button:hover:not(:disabled) {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.dev-panel button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.dev-panel-hint {
  font-size: 10px;
  color: var(--text-muted);
  margin-left: 6px;
  font-style: italic;
}

.dev-panel-divider {
  height: 1px;
  background: var(--border-muted);
  margin: 4px 0;
}

.dev-panel-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 4px 10px 2px;
}

.dev-panel-choice {
  padding-left: 22px !important;
  display: flex !important;
  align-items: center;
  gap: 8px;
}

.dev-panel-choice-active {
  color: var(--text-primary) !important;
  opacity: 1 !important;
}

.dev-check-icon {
  flex-shrink: 0;
}

.dev-panel-choice-active .dev-check-icon {
  color: var(--neon-accent, #22c55e);
}

.dev-panel-download-item {
  display: none !important;
}


/* ── Orchestrator sub-menu ─────────────────────────────────────── */

.dev-sub-panel {
  position: absolute;
  right: 100%;
  top: 0;
  margin-right: 4px;
  width: 280px;
  max-height: 70vh;
  display: flex;
  flex-direction: column;
  background: var(--card-bg);
  border: 1px solid var(--border-primary);
  border-radius: 10px;
  padding: 8px;
  z-index: 51;
  box-shadow: var(--shadow-md);
}

.dev-sub-header {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 4px 6px 8px;
  border-bottom: 1px solid var(--border-primary);
  margin-bottom: 6px;
}

.dev-sub-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.dev-sub-current {
  font-size: 11px;
  color: var(--text-muted);
  font-style: italic;
}

.dev-sub-search {
  position: relative;
  margin-bottom: 6px;
}

.dev-sub-search-icon {
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  opacity: 0.5;
  pointer-events: none;
}

.dev-sub-search input {
  width: 100%;
  box-sizing: border-box;
  padding: 7px 8px 7px 30px;
  border: 1px solid var(--border-primary);
  border-radius: 8px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 12px;
}

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

.dev-sub-search input::placeholder {
  color: var(--text-muted);
}

.dev-sub-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  flex: 1;
}

.dev-sub-list li {
  margin-bottom: 2px;
}

.dev-sub-item {
  width: 100%;
  text-align: left;
  padding: 6px 8px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 1px;
  font-size: 12px;
  transition: background 0.1s;
}

.dev-sub-item:hover {
  background: var(--bg-tertiary);
}

.dev-sub-item-active {
  border-color: var(--accent-primary);
  background: var(--accent-light);
}

.dev-sub-item-active:hover {
  background: var(--accent-light);
}

.dev-sub-item strong {
  font-weight: 500;
  font-size: 12px;
}

.dev-sub-provider {
  font-size: 10px;
  color: var(--text-muted);
}

/* responsive rules consolidated below */

/* ── Status / Loading ──────────────────────────────────────────── */

.status-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  color: var(--text-muted);
  font-size: 13px;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-primary);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ── Auth Badge ───────────────────────────────────────────────── */

.auth-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  padding: 4px 8px;
  border-radius: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
}

.auth-username {
  font-weight: 500;
  color: var(--text-secondary);
}

.auth-org-tag {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--accent-primary);
  color: #fff;
  letter-spacing: 0.5px;
}

.auth-remaining {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

.auth-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.auth-link:hover {
  color: var(--text-primary);
}

.auth-login {
  color: var(--accent-primary);
  font-weight: 500;
}

.auth-login:hover {
  color: var(--text-primary);
}

/* ── Footer ─────────────────────────────────────────────────────── */

.app-footer {
  padding: 8px 24px;
  text-align: center;
  font-size: 10px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-primary);
  background: var(--bg-secondary);
  flex-shrink: 0;
}

.app-footer a {
  color: var(--text-muted);
  text-decoration: underline;
  transition: color 0.15s;
}

.app-footer a:hover {
  color: var(--text-secondary);
}

/* ── Scrollbar ──────────────────────────────────────────────────── */

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 3px;
}

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

/* ══════════════════════════════════════════════════════════════════
   RESPONSIVE BREAKPOINTS
   ══════════════════════════════════════════════════════════════════ */

/* ── Tablet (<900px) ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .persona-panels {
    grid-template-columns: 1fr;
  }
  .persona-field textarea {
    min-height: 60px;
  }
  .persona-field textarea.tall {
    min-height: 80px;
  }
  .freeform-textarea {
    min-height: 160px;
  }
  .accordion-header {
    padding: 12px 16px;
    font-size: 14px;
  }
  .accordion-body.open {
    padding: 12px 16px 16px;
  }
  .chat-controls {
    flex-wrap: wrap;
    gap: 8px;
  }
  .chat-controls input {
    flex-basis: 100%;
    font-size: 13px;
  }
  .message-row {
    gap: 8px;
  }
  .avatar {
    width: 32px;
    height: 32px;
    font-size: 12px;
  }
}

/* ── Small tablet / large phone (<600px) ──────────────────────── */
@media (max-width: 600px) {
  .dev-download-btns {
    display: none;
  }
  .dev-panel-download-item {
    display: block !important;
  }
  .dev-sub-panel {
    right: 0;
    top: 100%;
    margin-right: 0;
    margin-top: 4px;
    width: min(280px, calc(100vw - 24px));
  }
  .dev-panel {
    min-width: 200px;
  }
  .auth-badge {
    font-size: 11px;
    padding: 3px 6px;
    gap: 4px;
  }
  .auth-remaining {
    display: none;
  }
}

/* ── Phone (<480px) ───────────────────────────────────────────── */
@media (max-width: 480px) {
  .persona-panels {
    gap: 12px;
  }
  .persona-panel {
    gap: 8px;
  }
  .persona-panel-header {
    font-size: 13px;
    padding-bottom: 6px;
  }
  .persona-field label {
    font-size: 11px;
  }
  .persona-field input,
  .persona-field textarea {
    padding: 8px 10px;
    font-size: 12px;
  }
  .persona-field textarea {
    min-height: 50px;
  }
  .persona-field textarea.tall {
    min-height: 60px;
  }
  .freeform-textarea {
    min-height: 120px;
  }
  .accordion {
    border-radius: 8px;
    margin-bottom: 10px;
  }
  .accordion-header {
    padding: 10px 12px;
    font-size: 13px;
  }
  .accordion-body.open {
    padding: 10px 12px 14px;
  }
  .chat-controls {
    gap: 6px;
    padding: 8px 0;
  }
  .btn-primary,
  .btn-secondary,
  .btn-stop {
    padding: 8px 14px;
    font-size: 13px;
  }
  .message-bubble {
    padding: 10px 12px;
    font-size: 13px;
    border-radius: 12px;
  }
  .message-row {
    gap: 6px;
    margin-bottom: 6px;
  }
  .avatar {
    width: 28px;
    height: 28px;
    font-size: 11px;
  }
  .system-message {
    font-size: 13px;
    padding: 8px;
  }
  .system-message.end-of-chat {
    font-size: 14px;
    padding: 14px;
  }
  .btn-sm {
    padding: 5px 8px;
    font-size: 11px;
  }
  .btn-ghost {
    font-size: 12px;
  }
  .auth-badge {
    display: none;
  }
  .app-footer {
    padding: 6px 12px;
  }
}

/* ── Role Prompt Modal ─────────────────────────────────────────── */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.15s ease;
}

.modal-content {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: 12px;
  width: min(680px, 90vw);
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

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

.modal-header h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text-muted);
  padding: 0 4px;
  line-height: 1;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
}

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

.modal-body {
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.role-prompt-section h3 {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.role-prompt-model {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 12px;
}

.role-prompt-text {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0;
  max-height: 260px;
  overflow-y: auto;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}