:root {
  color-scheme: dark;
  --bg: #14161a;
  --panel: #1c1f26;
  --line: #2c313b;
  --text: #e6e9ef;
  --muted: #9aa3b2;
  --accent: #56b6c2;
  --error: #e06c75;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid var(--line);
}

h1 { margin: 0; font-size: 1.1rem; letter-spacing: 0.02em; }

.status { color: var(--muted); font-size: 0.85rem; }
.status.error { color: var(--error); }

main {
  display: grid;
  grid-template-columns: 1fr 22rem;
  gap: 1.2rem;
  padding: 1.2rem;
  align-items: start;
}

.board {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
  min-height: 20rem;
}

canvas { display: block; width: 100%; height: auto; }

.summary {
  margin: 0.8rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

.side { display: flex; flex-direction: column; gap: 1.2rem; }

.controls, .chat {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
}

.row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.7rem;
}

.row:last-child { margin-bottom: 0; }

label { color: var(--muted); font-size: 0.85rem; white-space: nowrap; }
.check { display: flex; align-items: center; gap: 0.3rem; }

input[type="number"], input[type="text"], select {
  min-width: 0;
  flex: 1;
  padding: 0.4rem 0.5rem;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 5px;
  font: inherit;
  font-size: 0.9rem;
}

button {
  flex: 1;
  padding: 0.5rem 0.9rem;
  background: var(--accent);
  color: #0d1117;
  border: 0;
  border-radius: 5px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button:disabled { opacity: 0.5; cursor: default; }

.chat { display: flex; flex-direction: column; gap: 0.7rem; }

.log {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  height: 18rem;
  overflow-y: auto;
  font-size: 0.9rem;
}

.msg {
  padding: 0.45rem 0.6rem;
  border-radius: 6px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.msg.user { background: #23303a; align-self: flex-end; max-width: 90%; }
.msg.bot { background: #23262e; }
.msg.tool { color: var(--muted); font-size: 0.8rem; padding: 0.2rem 0; }
.msg.err { background: #3a2326; color: var(--error); }

.chatForm { display: flex; gap: 0.5rem; }
.chatForm button { flex: 0 0 auto; }

@media (max-width: 900px) {
  main { grid-template-columns: 1fr; }
}

.game {
  margin: 0.4rem 0 0;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  min-height: 1.4em;
}

.hint {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.78rem;
}