:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1f232d;
  --border: #2b303b;
  --text: #e7e9ee;
  --muted: #9aa1ad;
  --a: #6ea8fe;
  --b: #f7a072;
  --accent: #7c5cff;
  --warn: #ffb84d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header { padding: 20px 24px 0; }
h1 { margin: 0; font-size: 1.5rem; }
h2 { margin: 0 0 8px; font-size: 1.05rem; }

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 16px 24px 60px;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 12px;
}

input[type="text"], input[type="password"], textarea, select {
  width: 100%;
  margin-top: 4px;
  padding: 9px 11px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
}
textarea { resize: vertical; }

button {
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
button:hover { filter: brightness(1.08); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.secondary, .import-label.secondary {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 500;
}

/* Key bar */
.keybar {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 20px;
}
.keybar-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}
.keybar-row label { margin-bottom: 0; flex: 1; min-width: 220px; }
.keybar-note { margin: 10px 0 0; font-size: 0.8rem; }

/* Setup */
.topic-row, .personas {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.personas { margin-top: 8px; }

.persona-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.persona-card[data-idx="0"] h2 { color: var(--a); }
.persona-card[data-idx="1"] h2 { color: var(--b); }

.persona-io {
  display: flex;
  gap: 8px;
  align-items: center;
}
.persona-io .p-load { flex: 1; margin-top: 0; }
.persona-io button { white-space: nowrap; padding: 9px 12px; }

.start-row {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  margin-top: 16px;
  flex-wrap: wrap;
}
.start-row label { margin-bottom: 0; }
.start-row select { width: auto; }
.free-only-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
  cursor: pointer;
}
.free-only-label input { width: auto; margin: 0; cursor: pointer; }

/* History */
.history {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.history-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.import-label {
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
}
.history-list { list-style: none; margin: 12px 0 0; padding: 0; }
.history-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.hist-title { font-weight: 600; }
.hist-actions { display: flex; gap: 6px; }
.hist-actions button { padding: 6px 12px; font-size: 0.82rem; }

/* Debate */
.debate-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}
.debate-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.transcript {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.bubble {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  background: var(--panel);
  max-width: 82%;
}
.bubble.side-0 { align-self: flex-start; border-left: 3px solid var(--a); }
.bubble.side-1 { align-self: flex-end; border-right: 3px solid var(--b); }
.bubble .who { font-weight: 700; font-size: 0.9rem; margin-bottom: 4px; }
.bubble.side-0 .who { color: var(--a); }
.bubble.side-1 .who { color: var(--b); }
.bubble .model { color: var(--muted); font-size: 0.75rem; font-weight: 400; }
.bubble .content { white-space: pre-wrap; }

.debate-foot {
  display: flex;
  justify-content: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.debate-foot .next-turn { padding: 12px 32px; }

#setup-form.locked {
  opacity: 0.35;
  pointer-events: none;
  user-select: none;
}

.muted { color: var(--muted); font-size: 0.85rem; }
.warn { color: var(--warn); }
.status-error {
  color: var(--warn);
  font-size: 0.85rem;
  background: color-mix(in srgb, var(--warn) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent);
  border-radius: 8px;
  padding: 8px 12px;
  white-space: pre-wrap;
}
code { background: var(--panel-2); padding: 1px 5px; border-radius: 4px; }

@media (max-width: 720px) {
  .topic-row, .personas { grid-template-columns: 1fr; }
  .bubble { max-width: 100%; }
}