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

:root {
  --bg: #1a1a2e;
  --surface: #16213e;
  --surface2: #0f3460;
  --accent: #e94560;
  --text: #eee;
  --text-muted: #999;
  --user-bg: #0f3460;
  --agent-bg: #1a1a2e;
  --input-bg: #16213e;
  --border: #333;
  --running-bg: rgba(233, 69, 96, 0.08);
  --tab-active: #e94560;
  --tab-inactive: #16213e;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
  overflow: hidden;
}

.app {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-height: 100dvh;
}

/* ── Tab Bar ─────────────────────────────────────────────────────────── */

.tab-bar {
  display: flex;
  align-items: center;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 4px 8px;
  gap: 4px;
  overflow-x: auto;
  flex-shrink: 0;
  -webkit-overflow-scrolling: touch;
}

.tab-list {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.tab-item {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border-radius: 6px;
  background: var(--tab-inactive);
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: background 0.15s, color 0.15s;
  user-select: none;
}

.tab-item:hover {
  background: var(--surface2);
  color: var(--text);
}

.tab-item.active {
  background: var(--surface2);
  color: var(--text);
  border-color: var(--tab-active);
}

.tab-item.running {
  color: var(--accent);
}

.tab-item.running::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.tab-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 3px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 11px;
  cursor: pointer;
  line-height: 1;
}

.tab-close:hover {
  background: var(--accent);
  color: #fff;
}

.tab-new-btn {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px dashed var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* ── Settings Panel ──────────────────────────────────────────────────── */

.settings-panel {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 8px 12px;
  display: flex;
  gap: 12px;
  align-items: center;
  flex-shrink: 0;
  flex-wrap: wrap;
}

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

.settings-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.settings-row label {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}

.settings-row select,
.settings-row input {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 13px;
  font-family: inherit;
}

.settings-row input {
  width: 200px;
}

.settings-row.locked select,
.settings-row.locked input {
  opacity: 0.5;
  pointer-events: none;
}

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

.chat-area {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: background 0.3s;
}

.chat-area.running {
  background: var(--running-bg);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.chat-empty {
  color: var(--text-muted);
  text-align: center;
  margin: auto;
  font-size: 14px;
}

.msg {
  max-width: 85%;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg.user {
  align-self: flex-end;
  background: var(--user-bg);
  border-bottom-right-radius: 2px;
}

.msg.agent {
  align-self: flex-start;
  background: var(--agent-bg);
  border: 1px solid var(--border);
  border-bottom-left-radius: 2px;
  font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
  font-size: 12px;
}

.msg.system {
  align-self: center;
  color: var(--text-muted);
  font-size: 11px;
  font-style: italic;
}

/* ── Input Bar ───────────────────────────────────────────────────────── */

.input-bar {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  padding: 8px 12px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.input-bar textarea {
  flex: 1;
  background: var(--input-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 14px;
  font-family: inherit;
  resize: none;
  max-height: 120px;
  line-height: 1.4;
  overflow-y: auto;
}

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

.input-bar textarea:disabled {
  opacity: 0.5;
}

.send-btn {
  padding: 8px 16px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

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

.send-btn.stop-btn {
  background: var(--accent);
  animation: pulse 1s infinite;
}

.send-btn.big-stop-btn {
  background: #ff0000;
  font-size: 18px;
  padding: 12px 24px;
  animation: none;
}

.record-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

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

.record-btn.recording {
  background: var(--accent);
  border-color: var(--accent);
  animation: pulse 1s infinite;
}

.hidden { display: none !important; }

/* ── Responsive ──────────────────────────────────────────────────────── */

@media (max-width: 480px) {
  .settings-row input { width: 140px; }
  .msg { max-width: 92%; }
  .send-btn { padding: 8px 10px; font-size: 12px; }
}