:root {
  --bg: #0b0c10;
  --card: #12141a;
  --fg: #dfe8f0;
  --muted: #93a1ad;
  --accent: #8ad3ff;
  --accent2: #ffd38a;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, 'Helvetica Neue', Arial, 'Noto Sans', 'Liberation Sans', sans-serif;
  color: var(--fg);
  background: radial-gradient(1200px 800px at 100% -20%, #142035 0, #0b0c10 60%);
  min-height: 100vh;
}
.wrap {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 16px;
}
h1 { font-size: 28px; margin: 0 0 18px; letter-spacing: 0.3px; }
h1 span { font-weight: 400; color: var(--muted); }

form { background: var(--card); border: 1px solid #1b2130; border-radius: 16px; padding: 16px; }
.row { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
label { color: var(--muted); font-size: 14px; }
select, input, textarea, button {
  background: #0e1220;
  color: var(--fg);
  border: 1px solid #1f2638;
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
}
textarea { width: 100%; resize: vertical; }
button { cursor: pointer; background: linear-gradient(180deg, #0f1629, #0c1020); border-color: #2a3658; }
button:hover { border-color: var(--accent); }
#status { color: var(--accent2); font-size: 13px; }

.card {
  margin-top: 16px;
  background: var(--card);
  border: 1px solid #1b2130;
  border-radius: 16px;
  padding: 16px;
  min-height: 80px;
  white-space: pre-wrap;
  line-height: 1.5;
}
footer { color: var(--muted); font-size: 13px; margin-top: 12px; }

/* Chat bubbles */
.bubble {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  white-space: pre-wrap;
  line-height: 1.5;
}
.bubble.user {
  background: #1a2236;
  border: 1px solid #2a3658;
}
.bubble.assistant {
  background: #12141a;
  border: 1px solid #1b2130;
}

/* Persona textarea styling */
#system {
  font-family: ui-monospace, 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;
  font-size: 13px;
  line-height: 1.4;
}

/* Chat control buttons */
.secondary {
  background: linear-gradient(180deg, #1a2236, #12141a);
  border-color: #2a3658;
  color: var(--muted);
  font-size: 13px;
  padding: 8px 12px;
  margin-left: 8px;
}

.secondary:hover {
  border-color: var(--accent);
  color: var(--fg);
  background: linear-gradient(180deg, #2a3658, #1a2236);
}

#new-chat {
  background: linear-gradient(180deg, #1a2236, #12141a);
}

#clear-chat {
  background: linear-gradient(180deg, #2d1a1a, #1a1212);
  border-color: #4a2a2a;
}

#clear-chat:hover {
  border-color: #ff6b6b;
  background: linear-gradient(180deg, #4a2a2a, #2d1a1a);
}

/* Streaming indicator */
.streaming {
  position: relative;
}

.streaming::after {
  content: '';
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.3; transform: translateY(-50%) scale(0.8); }
  50% { opacity: 1; transform: translateY(-50%) scale(1.2); }
}