* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: #0b1020;
  color: #e9ecf5;
}

.app {
  max-width: 900px;
  margin: 0 auto;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 16px;
  gap: 12px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 14px;
  background: rgba(255,255,255,0.06);
}

h1 { margin: 0; font-size: 18px; }

.sub {
  margin: 6px 0 0 0;
  opacity: 0.8;
  font-size: 13px;
}

.pill {
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.08);
  font-size: 12px;
  white-space: nowrap;
}

.chat {
  flex: 1;
  overflow: auto;
  padding: 14px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 14px;
  background: rgba(255,255,255,0.04);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.msg {
  max-width: 78%;
  padding: 10px 12px;
  border-radius: 14px;
  line-height: 1.35;
  font-size: 14px;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.user {
  align-self: flex-end;
  background: rgba(76, 132, 255, 0.22);
  border: 1px solid rgba(76, 132, 255, 0.35);
}

.bot {
  align-self: flex-start;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.14);
}

.meta {
  margin-top: 6px;
  font-size: 12px;
  opacity: 0.7;
}

.composer { display: flex; gap: 10px; }

.composer input {
  flex: 1;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.06);
  color: #e9ecf5;
  outline: none;
}

.composer button {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.10);
  color: #e9ecf5;
  cursor: pointer;
}

.composer button:disabled { opacity: 0.6; cursor: not-allowed; }