:root {
  --bg: #0e1621;
  --panel: #17212b;
  --panel-hover: #1d2733;
  --panel-active: #2b5278;
  --border: #0b141c;
  --text: #e8eaed;
  --text-dim: #8a98a6;
  --bubble: #1e2c3a;
  --accent: #4ea3e0;
  --danger: #e05c5c;
  --warn: #e0b84e;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
}

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

.sidebar {
  width: 320px;
  min-width: 240px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 12px 16px;
  font-weight: 600;
  font-size: 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.switch-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 400;
  color: var(--text-dim);
  cursor: pointer;
  user-select: none;
}

.switch-row input[type="checkbox"] {
  width: 32px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--accent);
}

.chat-list {
  overflow-y: auto;
  flex: 1;
}

.chat-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
}

.chat-item:hover { background: var(--panel-hover); }
.chat-item.active { background: var(--panel-active); }

.chat-item .row1 {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.chat-item .name {
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-item .time {
  color: var(--text-dim);
  font-size: 12px;
  flex-shrink: 0;
}

.chat-item .preview {
  color: var(--text-dim);
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-item .preview.deleted { color: var(--danger); font-style: italic; }

.chat-item .row2 {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.chat-item .preview { flex: 1; min-width: 0; }

.chat-item select.voice-pref {
  background: var(--bg);
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 11px;
  padding: 1px 2px;
  flex-shrink: 0;
  max-width: 90px;
}

.chat-item select.voice-pref.on { color: var(--accent); border-color: var(--accent); }
.chat-item select.voice-pref.off { color: var(--text-dim); }

.thread {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.thread-header {
  padding: 14px 20px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.thread-header .sub {
  font-weight: 400;
  color: var(--text-dim);
  font-size: 12px;
  margin-top: 2px;
}

.load-older {
  text-align: center;
  padding: 8px;
  color: var(--accent);
  cursor: pointer;
  font-size: 13px;
}
.load-older:hover { text-decoration: underline; }

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.bubble {
  max-width: 60%;
  background: var(--bubble);
  padding: 8px 12px;
  border-radius: 10px 10px 10px 2px;
  align-self: flex-start;
  position: relative;
}

.bubble.out {
  background: var(--panel-active);
  border-radius: 10px 10px 2px 10px;
  align-self: flex-end;
}

.bubble.deleted {
  border: 1px solid var(--danger);
  opacity: 0.85;
}

.bubble .meta {
  display: flex;
  gap: 8px;
  color: var(--text-dim);
  font-size: 11px;
  margin-top: 4px;
}

.bubble .badge {
  font-size: 11px;
  border-radius: 4px;
  padding: 0 4px;
}

.badge.edited { color: var(--warn); }
.badge.deleted { color: var(--danger); }

.bubble .text { white-space: pre-wrap; word-break: break-word; }

.bubble .original {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px dashed var(--text-dim);
  color: var(--text-dim);
  font-size: 12px;
}

.bubble .transcript {
  margin-top: 6px;
  padding: 6px 8px;
  background: rgba(78, 163, 224, 0.12);
  border-radius: 6px;
  font-size: 13px;
}

.bubble img, .bubble video {
  max-width: 100%;
  border-radius: 8px;
  display: block;
  margin-bottom: 6px;
}

.bubble audio { width: 260px; }

.media-missing {
  color: var(--text-dim);
  font-style: italic;
  font-size: 13px;
}

.empty-state {
  color: var(--text-dim);
  text-align: center;
  margin-top: 40px;
}