:root {
  --bg: #0f1216;
  --panel: #181d24;
  --panel-2: #1f2630;
  --line: #2a323d;
  --text: #e6eaef;
  --muted: #9aa6b2;
  --accent: #6ea8fe;
  --accent-ink: #0b1220;
  --ok: #3ddc84;
  --warn: #f5b042;
  --err: #ff6b6b;
  --radius: 14px;
  --light: #e9d7b7;
  --dark: #9c7a4d;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: radial-gradient(1200px 600px at 70% -10%, #1b2230 0%, var(--bg) 60%);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}
.wrap { max-width: 980px; margin: 0 auto; padding: 22px 18px 60px; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.sm { font-size: 13px; }
.mono { font-family: var(--mono); }

.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 22px; }
.brand { display: flex; align-items: center; gap: 14px; }
.logo { font-size: 38px; line-height: 1; filter: drop-shadow(0 2px 6px rgba(0,0,0,.4)); }
h1 { font-size: 20px; margin: 0; letter-spacing: .2px; }
.sub { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
.who { display: flex; align-items: center; gap: 10px; }
.pill { background: var(--panel-2); border: 1px solid var(--line); border-radius: 999px; padding: 5px 11px; font-family: var(--mono); font-size: 12px; color: var(--muted); }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 18px; box-shadow: 0 10px 30px rgba(0,0,0,.25); }
.login h2 { margin: 0 0 6px; font-size: 17px; }
.login p { margin: 0 0 14px; }

.btn { appearance: none; cursor: pointer; border: 1px solid var(--line); background: var(--panel-2); color: var(--text); padding: 10px 16px; border-radius: 10px; font-size: 14px; font-weight: 600; transition: .15s; }
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.ghost { background: transparent; }
.btn.sm { padding: 7px 12px; font-size: 13px; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

.advanced { margin-top: 14px; }
.advanced summary { cursor: pointer; color: var(--muted); font-size: 13px; }
.advanced textarea { width: 100%; margin: 10px 0; background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 10px; padding: 9px; font-family: var(--mono); font-size: 13px; resize: vertical; }
.warn { color: var(--warn); font-size: 12px; }
.err { color: var(--err); font-size: 13px; min-height: 1em; margin: 8px 0 0; }

.dropzone { position: relative; border: 2px dashed var(--line); border-radius: 12px; min-height: 220px; display: grid; place-items: center; text-align: center; cursor: pointer; transition: .15s; background: var(--panel-2); overflow: hidden; }
.dropzone:hover, .dropzone:focus-visible, .dropzone.drag { border-color: var(--accent); background: #202836; outline: none; }
.drop-empty p { margin: 6px 0; }
.drop-icon { font-size: 40px; }
.preview { max-width: 100%; max-height: 420px; display: block; border-radius: 8px; }

.controls { display: flex; align-items: center; gap: 14px; margin-top: 14px; flex-wrap: wrap; }
.controls .grow { flex: 1; }
.check { color: var(--muted); font-size: 13px; display: flex; gap: 7px; align-items: center; cursor: pointer; }
.status { min-height: 1.2em; margin: 12px 0 0; font-size: 14px; color: var(--muted); }
.status.busy { color: var(--accent); }
.status.bad { color: var(--err); }

.result-grid { display: grid; grid-template-columns: minmax(260px, 1fr) 1.1fr; gap: 22px; }
@media (max-width: 720px) { .result-grid { grid-template-columns: 1fr; } }

.board { width: 100%; aspect-ratio: 1/1; display: grid; grid-template-columns: repeat(8, 1fr); grid-template-rows: repeat(8, 1fr); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.sq { display: grid; place-items: center; font-size: clamp(20px, 5.4vw, 40px); line-height: 1; user-select: none; }
.sq.l { background: var(--light); }
.sq.d { background: var(--dark); }
.sq .pc { color: #111; text-shadow: 0 1px 0 rgba(255,255,255,.35); }
.sq .pc.w { color: #fafafa; text-shadow: 0 1px 1px rgba(0,0,0,.55); }
.board-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 10px; gap: 10px; flex-wrap: wrap; }
.side { color: var(--muted); font-size: 13px; }
.side select { background: var(--panel-2); color: var(--text); border: 1px solid var(--line); border-radius: 8px; padding: 5px 8px; margin-left: 6px; }

.badge { font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); }
.badge.ok { color: var(--ok); border-color: rgba(61,220,132,.4); background: rgba(61,220,132,.08); }
.badge.warn { color: var(--warn); border-color: rgba(245,176,66,.4); background: rgba(245,176,66,.08); }
.badge.bad { color: var(--err); border-color: rgba(255,107,107,.4); background: rgba(255,107,107,.08); }

.fld { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.fld input, .fld textarea { width: 100%; margin-top: 6px; background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 10px; padding: 10px; font-size: 13px; }
.fld textarea { resize: vertical; }
.raw { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px; max-height: 220px; overflow: auto; white-space: pre-wrap; word-break: break-word; font-size: 12px; color: var(--muted); }

.foot { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 12px; flex-wrap: wrap; margin-top: 8px; }
.foot code { color: var(--text); }
.flash { animation: flash .8s ease; }
@keyframes flash { from { color: var(--ok); } to { color: inherit; } }

/* nostr-universal NostrLoginUI theming + identity chip */
:root {
  --nui-bg: var(--panel);
  --nui-card: var(--panel-2);
  --nui-card-hover: #26303d;
  --nui-primary: var(--accent);
  --nui-primary-hover: #5a97f0;
  --nui-text: var(--text);
  --nui-muted: var(--muted);
  --nui-success: var(--ok);
  --nui-error: var(--err);
  --nui-border: var(--line);
}
#loginCard { margin-top: 6px; }
.chip { display: flex; align-items: center; gap: 8px; background: var(--panel-2); border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px 4px 4px; }
.chip img, .chip svg, .chip canvas { border-radius: 50%; flex: none; }
.chip-meta { min-width: 0; line-height: 1.15; }
.chip-name { font-size: 12px; font-weight: 600; max-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chip-npub { font-size: 11px; color: var(--muted); font-family: var(--mono); }