:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1f2630;
  --line: #2a323d;
  --text: #e6edf3;
  --muted: #8b95a3;
  --accent: #4f8cff;
  --ok: #2ecc71;
  --fast: #f5a623;
  --slow: #5ab0ff;
  --danger: #ff5c5c;
  --bet: #ffc93c;
  --radius: 12px;
  --font: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Mono", Consolas, "SF Mono", Menlo, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
}

button, input, select { font: inherit; color: inherit; }

.mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 20px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
}

.conn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--muted);
}
.conn::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
}
.conn.on::before { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.conn.off { color: var(--danger); }
.conn.off::before { background: var(--danger); }

.icon-btn {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 4px 10px;
  cursor: pointer;
}
.icon-btn:hover { border-color: var(--muted); }

.lang-select {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 4px 8px;
}
.lang-select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }