:root {
  --bg: #0a0f0c;
  --bg-panel: #0e1511;
  --bg-elevated: #121b15;
  --border: #1e2c23;
  --text: #d4e4d8;
  --text-dim: #7a9484;
  --accent: #3ddc84;
  --accent-dim: #2a9a5f;
  --accent-warm: #ffb454;
  --user-bg: #16241c;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
}

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

html,
body,
#root {
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.55;
}

.app {
  display: flex;
  height: 100%;
}

/* ---------- Sidebar ---------- */
.sidebar {
  width: 250px;
  flex-shrink: 0;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 16px 14px;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 12px;
}

.brand-prompt {
  animation: blink 1.2s steps(2) infinite;
}

@keyframes blink {
  50% {
    opacity: 0.25;
  }
}

.btn-new,
.btn-settings,
.btn-send {
  font-family: inherit;
  font-size: 13px;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  border-radius: 6px;
  padding: 7px 12px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn-new {
  width: 100%;
}

.btn-new:hover,
.btn-settings:hover {
  background: rgba(61, 220, 132, 0.08);
  border-color: var(--accent);
}

.session-list {
  overflow-y: auto;
  flex: 1;
  padding: 8px;
}

.empty-hint {
  color: var(--text-dim);
  padding: 10px;
  font-size: 13px;
}

.session-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-dim);
  margin-bottom: 2px;
}

.session-item:hover {
  background: var(--bg-elevated);
  color: var(--text);
}

.session-item.active {
  background: var(--user-bg);
  color: var(--accent);
}

.session-title {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 13px;
}

.session-delete {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  opacity: 0;
  font-size: 12px;
}

.session-item:hover .session-delete {
  opacity: 1;
}

.session-delete:hover {
  color: #ff6b6b;
}

/* ---------- Main ---------- */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
}

.model-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-dim);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #555;
}

.status-dot.on {
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
}

.status-dot.off {
  background: #ff6b6b;
}

.settings-panel {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.setting-row {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--text-dim);
}

.setting-row.column {
  flex-direction: column;
  align-items: stretch;
}

.setting-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.setting-row textarea,
.provider-select,
.settings-panel input[list] {
  font-family: inherit;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 10px;
}

.setting-row textarea {
  resize: vertical;
}

.provider-select {
  min-width: 220px;
}

/* ---------- Messages ---------- */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px;
  scroll-behavior: smooth;
}

.welcome {
  max-width: 640px;
  margin: 80px auto;
  text-align: center;
  color: var(--text-dim);
}

.welcome-title {
  font-size: 22px;
  color: var(--accent);
  margin-bottom: 12px;
}

.welcome .hint {
  margin-top: 8px;
  font-size: 13px;
}

.msg {
  max-width: 760px;
  margin: 0 auto 20px;
}

.msg-role {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.msg-user .msg-role {
  color: var(--accent);
}

.user-content {
  background: var(--user-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  white-space: pre-wrap;
  word-break: break-word;
}

.markdown {
  word-break: break-word;
}

.markdown p {
  margin: 0 0 10px;
}

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

.markdown ul,
.markdown ol {
  margin: 0 0 10px 22px;
}

.markdown li {
  margin-bottom: 4px;
}

.markdown h1,
.markdown h2,
.markdown h3 {
  margin: 16px 0 8px;
  color: var(--accent);
}

.markdown blockquote {
  border-left: 3px solid var(--accent-dim);
  padding-left: 12px;
  color: var(--text-dim);
  margin: 0 0 10px;
}

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

.markdown table {
  border-collapse: collapse;
  margin-bottom: 10px;
}

.markdown th,
.markdown td {
  border: 1px solid var(--border);
  padding: 5px 10px;
  font-size: 13px;
}

.markdown :not(pre) > code {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 13px;
  color: var(--accent-warm);
}

.markdown pre {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  overflow-x: auto;
  margin-bottom: 10px;
  font-size: 13px;
}

/* ---------- Thinking ---------- */
.thinking {
  margin-bottom: 8px;
  border: 1px dashed var(--border);
  border-radius: 8px;
}

.thinking-toggle {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 12px;
  color: var(--text-dim);
  padding: 8px 10px;
  cursor: pointer;
}

.thinking-toggle:hover {
  color: var(--accent-warm);
}

.caret {
  display: inline-block;
  transition: transform 0.15s;
}

.caret.rotated {
  transform: rotate(90deg);
}

.thinking-body {
  padding: 4px 12px 10px;
  font-size: 12.5px;
  color: var(--text-dim);
  white-space: pre-wrap;
  max-height: 260px;
  overflow-y: auto;
}

/* ---------- Composer ---------- */
.composer {
  display: flex;
  gap: 10px;
  padding: 14px 20px 18px;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
  align-items: stretch;
}

.btn-mic {
  width: 46px;
  flex-shrink: 0;
  font-size: 18px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-dim);
  transition: border-color 0.15s, color 0.15s, box-shadow 0.15s;
}

.btn-mic:hover:not(:disabled) {
  border-color: var(--accent-dim);
  color: var(--accent);
}

.btn-mic.recording {
  border-color: #ff6b6b;
  color: #ff6b6b;
  animation: pulse 1.2s ease-in-out infinite;
}

.btn-mic.transcribing {
  border-color: var(--accent-warm);
  color: var(--accent-warm);
}

@keyframes pulse {
  50% {
    box-shadow: 0 0 0 5px rgba(255, 107, 107, 0.15);
  }
}

.voice-state {
  font-size: 12px;
  color: var(--accent-warm);
  white-space: nowrap;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-settings.toggled {
  color: var(--accent-warm);
  border-color: var(--accent-warm);
}

.voice-error {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin: 0 20px 8px;
  padding: 8px 12px;
  font-size: 13px;
  color: #ffb454;
  background: rgba(255, 180, 84, 0.08);
  border: 1px solid rgba(255, 180, 84, 0.3);
  border-radius: 8px;
}

.voice-error button {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
}

.composer textarea {
  flex: 1;
  resize: none;
  font-family: inherit;
  font-size: 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 11px 14px;
  min-height: 44px;
  max-height: 180px;
}

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

.composer textarea::placeholder {
  color: #4d6355;
}

.btn-send {
  min-width: 96px;
  align-self: stretch;
}

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

.btn-send:not(:disabled):hover {
  background: rgba(61, 220, 132, 0.1);
}

.btn-send.stop {
  color: var(--accent-warm);
  border-color: var(--accent-warm);
}

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

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

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