:root {
  color-scheme: dark;
  --bg: #1e1f22;
  --field: #2b2d31;
  --hover: #383a40;
  --border: #3a3d43;
  --fg: #e8e8e8;
  --muted: #9a9da3;
  --accent: #3d7ef0;
  --accent-hover: #5590f5;
  --good: #4cc35a;
  --danger: #ff5c5c;
  --board-bg: #141517;
  --status-bg: #17181a;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.4 system-ui, "Segoe UI", Ubuntu, Cantarell, sans-serif;
}

#app { display: flex; flex-direction: column; height: 100vh; min-height: 0; }

.toolbar {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 8px 10px;
}
.toolbar label { display: inline-flex; align-items: center; gap: 6px; margin-left: 8px; }
.spacer { flex: 1; }

button, select {
  font: inherit; color: var(--fg); background: var(--field);
  border: 1px solid var(--border); border-radius: 6px; padding: 5px 12px;
}
select { padding: 4px 8px; }
button:hover:not(:disabled), select:hover { background: var(--hover); }
button:disabled { color: #62666d; background: var(--bg); }
button.accent { background: var(--accent); border-color: var(--accent); color: #fff; }
button.accent:hover:not(:disabled) { background: var(--accent-hover); }
button.accent:disabled { background: var(--field); border-color: var(--border); color: #62666d; }

.body { display: flex; flex: 1; min-height: 0; }
#boardWrap {
  flex: 1; min-width: 0; position: relative; background: var(--board-bg);
  display: flex; align-items: center; justify-content: center;
}
#boardView { display: none; }
#placeholder { max-width: 460px; padding: 24px; color: var(--muted); }
#placeholder h2 { color: var(--fg); margin-top: 0; }
#placeholder li { margin: 6px 0; }
#placeholder b { color: var(--fg); }

#panel {
  width: 290px; flex: none; display: flex; flex-direction: column;
  padding: 16px; overflow: auto;
}
.turn { font-size: 19px; font-weight: 700; margin-bottom: 12px; min-height: 26px; }
.row { display: flex; gap: 8px; margin: 3px 0 9px; }
.swatch { width: 14px; height: 14px; border-radius: 2px; margin-top: 5px; flex: none; }
.move { font-size: 16px; font-weight: 700; }
.move .tag { font-weight: 400; color: var(--muted); font-size: 13px; margin-left: 8px; }
.line { color: var(--muted); font-size: 12px; }
.mate { font-size: 20px; font-weight: 700; color: var(--good); margin-top: 6px; min-height: 4px; }
.mate.danger { color: var(--danger); font-size: 16px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.buttons { display: flex; gap: 8px; }

#status {
  background: var(--status-bg); color: var(--muted);
  padding: 5px 10px; font-size: 13px; white-space: nowrap; overflow: hidden;
  text-overflow: ellipsis;
}

#video { position: fixed; left: -10000px; top: 0; width: 2px; height: 2px; opacity: 0; }

dialog {
  background: var(--bg); color: var(--fg); border: 1px solid var(--border);
  border-radius: 10px; padding: 0; max-width: 96vw; max-height: 94vh;
}
dialog::backdrop { background: rgba(0, 0, 0, 0.6); }
#calDialog[open] { display: flex; flex-direction: column; }
.dlg-head { padding: 10px 14px; display: flex; gap: 14px; align-items: baseline; flex-wrap: wrap; }
.dlg-scroll { overflow: auto; max-height: calc(94vh - 110px); max-width: 96vw; }
#calCanvas { display: block; cursor: crosshair; }
.dlg-foot { display: flex; gap: 8px; padding: 10px 14px; align-items: center; }
.check-body { display: flex; gap: 18px; padding: 16px; }
.check-body h3 { margin: 0 0 8px; }
.check-body pre { font: inherit; margin: 0 0 10px; }
#checkAdvice { max-width: 320px; }

a { color: #8fb4ff; }