:root {
  --bg: #0d1117; --panel: #161b22; --panel2: #1c2330; --line: #2d3646;
  --text: #e6edf3; --dim: #8b98a9; --accent: #4f8cff; --ok: #3fb950;
  --warn: #d29922; --err: #f85149;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--text);
  font: 15px/1.45 "Segoe UI", system-ui, sans-serif;
  display: flex; flex-direction: column;
}
header {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 18px; border-bottom: 1px solid var(--line);
  background: var(--panel);
}
.brand { font-weight: 600; letter-spacing: .4px; }
.pill {
  font-size: 12px; padding: 3px 10px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--dim);
}
.pill.ready { color: var(--ok); border-color: var(--ok); }
.pill.loading { color: var(--warn); border-color: var(--warn); }
.pill.error { color: var(--err); border-color: var(--err); }
.bench { font-size: 12px; color: var(--dim); margin-left: auto; }

main { flex: 1; overflow: auto; padding: 18px; }
h2 { font-weight: 500; color: var(--dim); margin: 4px 2px 14px; }
.hidden { display: none !important; }

/* character picker */
.char-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
  gap: 14px; max-width: 1100px;
}
.char-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  overflow: hidden; cursor: pointer; transition: transform .12s, border-color .12s;
  position: relative;
}
.char-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.char-card img { width: 100%; aspect-ratio: 1; object-fit: cover; display: block; }
.char-card .label {
  padding: 7px 9px; font-size: 12.5px; color: var(--dim);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.char-card .badge {
  position: absolute; top: 7px; right: 7px; font-size: 10px;
  background: rgba(0,0,0,.55); color: var(--warn);
  padding: 2px 7px; border-radius: 999px;
}

/* stage */
.stage-wrap {
  display: flex; gap: 20px; align-items: stretch;
  max-width: 1200px; margin: 0 auto; height: calc(100vh - 110px);
}
.avatar-panel { display: flex; flex-direction: column; gap: 10px; }
.canvas-holder {
  position: relative; height: calc(100% - 44px);
  border-radius: 14px; overflow: hidden; border: 1px solid var(--line);
  background: #000; aspect-ratio: 9 / 16;
}
#stage { height: 100%; width: 100%; display: block; }
#idleVideo { display: none; }
.stage-overlay {
  position: absolute; inset: 0; background: rgba(10, 13, 18, .78);
  display: flex; flex-direction: column; gap: 14px;
  align-items: center; justify-content: center; font-size: 14px; color: var(--dim);
  text-align: center; padding: 20px;
}
.spinner {
  width: 34px; height: 34px; border-radius: 50%;
  border: 3px solid var(--line); border-top-color: var(--accent);
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.status-chip {
  position: absolute; left: 10px; top: 10px; font-size: 12px;
  padding: 3px 12px; border-radius: 999px; background: rgba(0,0,0,.55);
  border: 1px solid var(--line); color: var(--dim);
}
.status-chip.speaking { color: var(--ok); border-color: var(--ok); }
.status-chip.thinking { color: var(--warn); border-color: var(--warn); }

/* chat */
.chat-panel {
  flex: 1; display: flex; flex-direction: column; min-width: 340px;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 14px;
}
.chat-head { display: flex; align-items: center; justify-content: space-between; }
.char-name { font-weight: 600; }
.chat-log { flex: 1; overflow-y: auto; margin: 12px 0; display: flex;
  flex-direction: column; gap: 10px; padding-right: 4px; }
.msg { max-width: 88%; padding: 9px 13px; border-radius: 12px; font-size: 14.5px;
  white-space: pre-wrap; word-wrap: break-word; }
.msg.user { align-self: flex-end; background: var(--accent); color: #fff;
  border-bottom-right-radius: 4px; }
.msg.bot { align-self: flex-start; background: var(--panel2);
  border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.msg.bot.pending::after { content: "▍"; opacity: .6; animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: 0; } }
.ask-row { display: flex; gap: 8px; }
#askInput {
  flex: 1; background: var(--panel2); color: var(--text);
  border: 1px solid var(--line); border-radius: 10px; padding: 11px 14px;
  font-size: 15px; outline: none;
}
#askInput:focus { border-color: var(--accent); }
button.ghost {
  background: transparent; color: var(--dim); border: 1px solid var(--line);
  border-radius: 10px; padding: 8px 14px; cursor: pointer; font-size: 14px;
}
button.ghost:hover { color: var(--text); border-color: var(--accent); }
button.ghost.small { padding: 5px 10px; font-size: 12.5px; }
.debug { margin-top: 10px; font-size: 12px; color: var(--dim); }
.debug summary { cursor: pointer; }
.debug-body { font-family: Consolas, monospace; white-space: pre-wrap;
  padding: 8px 2px 0; line-height: 1.6; }
.prep-bar { position: absolute; left: 0; right: 0; bottom: 0; height: 4px;
  background: var(--line); }
.prep-bar > div { height: 100%; width: 0; background: var(--accent);
  transition: width .3s; }