:root {
  --bg: #0b0f14;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22c55e;
  --border: #1f2937;
  --focus: 2px solid rgba(34,197,94,0.65);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: var(--focus); outline-offset: 2px; }

.layout {
  display: grid;
  grid-template-columns: 260px 1fr 320px;
  gap: 12px;
  padding: 16px;
  height: 100%;
}

.panel {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 14px;
  padding: 14px;
  overflow: auto;
}

@media (max-width: 1100px) {
  .layout { grid-template-columns: 260px 1fr; }
  .right { display: none; }
}
@media (max-width: 720px) {
  .layout { grid-template-columns: 1fr; }
  .left { display: none; }
}