/* ═══════════════════════════════════════════════════════
   Tab Panes
   ═══════════════════════════════════════════════════════ */

.tab-pane {
  display: none;
  animation: fadeIn 0.2s ease-out;
}

.tab-pane.active {
  display: block;
}

#tab-chat.active {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

/* ═══════════════════════════════════════════════════════
   Chat
   ═══════════════════════════════════════════════════════ */

.chat-setup-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 20px;
  min-height: 0;
  overflow: hidden;
  animation: fadeUp 0.4s ease-out;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.chat-setup-screen.fade-out {
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
}

.chat-setup-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
  margin-bottom: 16px;
  width: 100%;
  max-width: 960px;
  padding: 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: clip;
  flex-shrink: 1;
  min-height: 0;
}

.chat-setup-hero::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.6;
}

.chat-setup-hero .hero-text h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.35;
  margin-bottom: 12px;
  color: var(--text);
}

.chat-setup-hero .hero-text p {
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 540px;
}


/* ── Battle Setup ── */
.battle-setup {
  width: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.battle-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.battle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-dim);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  color: var(--accent);
  flex-shrink: 0;
}

.battle-header-text {
  display: flex;
  flex-direction: column;
}

.battle-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--text);
  line-height: 1.2;
}

.battle-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.battle-config {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

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

.battle-config .custom-select,
.battle-config .custom-select-trigger {
  width: 100%;
}

.battle-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.battle-mode-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  width: fit-content;
}

.battle-mode-btn {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 7px 16px;
  background: transparent;
  color: var(--text-muted);
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.battle-mode-btn.active {
  background: var(--accent);
  color: var(--bg);
}

.battle-mode-btn:not(.active):hover {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

/* Fighter picks: A vs B */
.battle-models {
  display: flex;
  align-items: center;
  gap: 12px;
}

.battle-fighter {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.fighter-badge {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(91, 156, 246, 0.12);
  color: var(--tag-lora);
  border: 1px solid rgba(91, 156, 246, 0.2);
}

.fighter-badge.fighter-b {
  background: rgba(167, 139, 250, 0.12);
  color: var(--tag-api);
  border-color: rgba(167, 139, 250, 0.2);
}

.battle-vs {
  flex-shrink: 0;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-style: italic;
  color: var(--text-muted);
}

.battle-random-msg {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--accent-dim);
  border: 1px dashed color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: var(--radius);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.battle-random-msg i {
  color: var(--accent);
  flex-shrink: 0;
}

.battle-fighter .custom-select,
.battle-fighter .custom-select-trigger {
  flex: 1;
  min-width: 0;
}

.battle-key-section {
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.battle-key-section .api-key-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.battle-key-section .api-key-wrap input {
  font-family: var(--font-body);
  font-size: 0.82rem;
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 36px 9px 32px;
  outline: none;
  width: 100%;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.battle-key-section .api-key-wrap input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-dim);
}

.battle-start-btn {
  font-family: var(--font-body);
  font-size: 0.86rem;
  font-weight: 600;
  padding: 11px 28px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.15s;
  align-self: stretch;
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.battle-start-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

/* Top bar showing selected constitution + models */
.chat-topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
  flex-shrink: 0;
}

.chat-topbar-label {
  font-weight: 600;
  color: var(--accent);
}

.chat-topbar-sep {
  color: var(--text-muted);
}

.chat-topbar-models {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.76rem;
}

.chat-new-btn {
  margin-left: auto;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}

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

/* Waiting state before first message */
.chat-waiting {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 30vh;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-style: italic;
}

/* Fade-in for chat arena after setup */
.fade-in {
  animation: fadeUp 0.35s ease-out;
}

.chat-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-width: 140px;
}

.chat-field label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.chat-field input {
  font-family: var(--font-body);
  font-size: 0.82rem;
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 12px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.chat-field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-dim);
}

/* Hide native selects (replaced by custom dropdown) */
.chat-field select {
  display: none;
}

.chat-field-key {
  flex: none;
  width: 320px;
}

.api-key-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.api-key-icon {
  position: absolute;
  left: 10px;
  color: var(--text-muted);
  pointer-events: none;
}

.api-key-wrap input {
  padding-left: 32px;
  padding-right: 36px;
  width: 100%;
}

.api-key-toggle {
  position: absolute;
  right: 4px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  transition: color 0.15s;
}

.api-key-toggle:hover {
  color: var(--text-primary);
}

.api-key-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 4px;
  opacity: 0.7;
}

/* ── Chat conversation (turn-based) ── */
.chat-arena-wrap {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 16px 24px 24px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.chat-arena-wrap::-webkit-scrollbar {
  width: 6px;
}

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

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

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

.chat-turn {
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: fadeUp 0.3s ease-out;
}

.chat-turn + .chat-turn {
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
}

/* User prompt — right-aligned bubble */
.chat-user-bubble {
  align-self: flex-end;
  background: var(--accent-dim);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, var(--border));
  border-radius: 18px 18px 4px 18px;
  padding: 10px 18px;
  font-size: 0.88rem;
  line-height: 1.55;
  max-width: 55%;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
  animation: fadeUp 0.25s ease-out;
}

/* Side-by-side response cards */
.chat-responses {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  max-width: 780px;
}

.chat-response-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.chat-response-card:hover {
  border-color: color-mix(in srgb, var(--border) 50%, var(--text-muted));
}

.chat-response-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
}

.chat-response-model {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.chat-response-actions {
  display: flex;
  gap: 2px;
}

.chat-response-action {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 3px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  opacity: 0;
  transition: all 0.15s;
}

.chat-response-card:hover .chat-response-action {
  opacity: 0.6;
}

.chat-response-action:hover {
  opacity: 1 !important;
  color: var(--accent);
  background: var(--accent-dim);
}

.chat-response-body {
  padding: 12px 14px;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

/* Markdown inside response body */
.chat-response-body p { margin: 0 0 0.6em; }
.chat-response-body p:last-child { margin-bottom: 0; }
.chat-response-body strong { font-weight: 600; }
.chat-response-body em { font-style: italic; }
.chat-response-body ul, .chat-response-body ol { margin: 0.4em 0; padding-left: 1.4em; }
.chat-response-body li { margin-bottom: 0.2em; }
.chat-response-body code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 4px;
}
.chat-response-body pre {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  overflow-x: auto;
  margin: 0.5em 0;
}
.chat-response-body pre code {
  background: none;
  border: none;
  padding: 0;
}
.chat-response-body blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 12px;
  margin: 0.5em 0;
  color: var(--text-secondary);
}
.chat-response-body h1, .chat-response-body h2, .chat-response-body h3 {
  font-family: var(--font-display);
  font-weight: 400;
  margin: 0.6em 0 0.3em;
}
.chat-response-body h1 { font-size: 1.1em; }
.chat-response-body h2 { font-size: 1em; }
.chat-response-body h3 { font-size: 0.95em; }

/* Streaming cursor */
.chat-response-body.streaming::after {
  content: "";
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 0.8s steps(2) infinite;
}

@keyframes blink {
  0% { opacity: 1; }
  50% { opacity: 0; }
}

/* Card highlight on vote hover */
.chat-response-card {
  transition: border-color 0.2s, box-shadow 0.2s;
}

.chat-response-card.highlight-a {
  border-color: var(--tag-lora);
  box-shadow: 0 0 12px rgba(91, 156, 246, 0.25);
}

.chat-response-card.highlight-b {
  border-color: var(--tag-api);
  box-shadow: 0 0 12px rgba(167, 139, 250, 0.25);
}

.chat-response-card.highlight-tie {
  border-color: var(--green);
  box-shadow: 0 0 12px rgba(74, 222, 128, 0.2);
}

.chat-response-card.highlight-bad {
  border-color: var(--red);
  box-shadow: 0 0 12px rgba(248, 113, 113, 0.2);
}

.chat-vote-bar {
  display: flex;
  align-items: center;
  justify-content: center;
}

.vote-buttons {
  display: flex;
  gap: 6px;
  width: 100%;
  max-width: 720px;
  justify-content: center;
}

.vote-btn {
  font-family: var(--font-body);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 9px 12px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.vote-btn svg {
  flex-shrink: 0;
  width: 13px;
  height: 13px;
}

.vote-btn:hover {
  transform: translateY(-1px);
  color: var(--text);
}

.vote-a:hover {
  border-color: var(--tag-lora);
  color: var(--tag-lora);
  background: rgba(91, 156, 246, 0.08);
  box-shadow: 0 0 16px rgba(91, 156, 246, 0.2);
}

.vote-b:hover {
  border-color: var(--tag-api);
  color: var(--tag-api);
  background: rgba(167, 139, 250, 0.08);
  box-shadow: 0 0 16px rgba(167, 139, 250, 0.2);
}

.vote-tie:hover {
  border-color: var(--green);
  color: var(--green);
  background: rgba(74, 222, 128, 0.08);
  box-shadow: 0 0 16px rgba(74, 222, 128, 0.2);
}

.vote-bad:hover {
  border-color: var(--red);
  color: var(--red);
  background: rgba(248, 113, 113, 0.08);
  box-shadow: 0 0 16px rgba(248, 113, 113, 0.2);
}


/* Bottom bar: vote buttons + input — pinned at bottom of chat pane */
.chat-input-wrap {
  flex-shrink: 0;
  padding: 12px 24px 18px;
  background: var(--bg);
  border-top: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.chat-input-bar {
  display: flex;
  align-items: center;
  gap: 0;
  width: 100%;
  max-width: 720px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 4px 4px 4px 18px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.chat-input-bar:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.chat-input-bar input {
  flex: 1;
  font-family: var(--font-body);
  font-size: 0.88rem;
  background: transparent;
  color: var(--text);
  border: none;
  outline: none;
  padding: 10px 8px;
}

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

.chat-send-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.15s;
}

.chat-send-btn:hover {
  background: var(--accent-hover);
  transform: scale(1.05);
}

.chat-send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.chat-disclaimer {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.01em;
  opacity: 0.7;
}

.chat-vote-result {
  text-align: center;
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.chat-vote-result svg {
  color: var(--green);
}