:root {
  --bg: #0f1721;
  --panel: #16212e;
  --panel2: #1d2b3a;
  --accent: #4ec9b0;
  --accent2: #f4b942;
  --danger: #e06c75;
  --text: #cdd6e4;
  --muted: #7f93a8;
  --line: #2a3a4d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: radial-gradient(1200px 800px at 70% -10%, #1b2a3d, var(--bg));
  color: var(--text);
  display: flex;
  justify-content: center;
  min-height: 100vh;
}

#app {
  display: flex;
  gap: 18px;
  padding: 18px;
  align-items: flex-start;
  max-width: 100%;
}

#game-wrap {
  position: relative;
  border: 3px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0,0,0,.5);
}

#game {
  display: block;
  background: #70c5ce;
}

#overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: rgba(0,0,0,.55);
  color: #fff;
  font-size: 22px;
  font-weight: 600;
  pointer-events: none;
}
#overlay.hidden { display: none; }
#overlay .small { font-size: 14px; opacity: .85; margin-top: 8px; font-weight: 400; }

#panel {
  width: 440px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px;
  box-shadow: 0 10px 40px rgba(0,0,0,.5);
}

h1 { margin: 0 0 2px; font-size: 22px; color: #fff; }
.subtitle { margin: 0 0 14px; color: var(--muted); font-size: 13px; }

.stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.stat {
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
}
.stat .lbl { display:block; font-size: 11px; color: var(--muted); }
.stat .val { display:block; font-size: 18px; font-weight: 700; color: #fff; font-variant-numeric: tabular-nums; }

.chart-wrap {
  margin: 14px 0 4px;
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
}
.chart-title { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
#chart { display:block; width: 100%; height: 120px; background:#0e1925; border-radius:6px; }

.controls { margin-top: 14px; display: flex; flex-direction: column; gap: 10px; }
button {
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--panel2);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  transition: all .15s;
}
button:hover { border-color: var(--accent); color: #fff; }
button:disabled { cursor: not-allowed; opacity: .45; }
button:disabled:hover { border-color: var(--line); color: var(--text); }
button.primary { background: var(--accent); color: #06231d; border-color: var(--accent); }
button.primary:hover { filter: brightness(1.08); }
button.small { align-self: flex-start; padding: 6px 10px; font-size: 12px; }

.row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}
.row span:first-child { width: 150px; color: var(--muted); }
.row input[type=range] { flex: 1; }
#speed-val { width: 40px; text-align: right; font-variant-numeric: tabular-nums; color: #fff; }

input[type=number] {
  width: 90px;
  background: #0e1925;
  border: 1px solid var(--line);
  color: #fff;
  border-radius: 6px;
  padding: 5px 7px;
  font-size: 13px;
}
input[type=checkbox] { width: 18px; height: 18px; accent-color: var(--accent); }

.advanced summary { cursor: pointer; color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.grid label { display:flex; flex-direction:column; gap:4px; font-size:12px; color: var(--muted); }

.log {
  margin-top: 12px;
  background: #0e1925;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  font-family: ui-monospace, "JetBrains Mono", Consolas, monospace;
  font-size: 11.5px;
  color: #9fb3c7;
  height: 110px;
  overflow-y: auto;
  line-height: 1.5;
}
.log .ok { color: var(--accent); }
.log .warn { color: var(--accent2); }
.log .err { color: var(--danger); }

@media (max-width: 900px) {
  #app { flex-direction: column; align-items: center; }
  #panel { width: 100%; max-width: 420px; }
}