:root {
  --bg: #0a0d14;
  --panel: rgba(16, 20, 30, 0.82);
  --border: rgba(120, 160, 255, 0.16);
  --text: #e6ecf7;
  --muted: #8b98b0;
  --accent: #4ade80;
  --danger: #f87171;
  --warn: #fbbf24;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

#arena { display: block; width: 100vw; height: 100vh; cursor: crosshair; }

#hud { position: fixed; inset: 0; pointer-events: none; }

.panel {
  position: absolute;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  backdrop-filter: blur(8px);
  font-size: 13px;
  line-height: 1.45;
}

.stats { top: 12px; left: 12px; min-width: 168px; }
.stat, .row { display: flex; justify-content: space-between; gap: 18px; }
.stat .k, .row .k { color: var(--muted); }
.accent { color: var(--accent); }

.board { top: 12px; right: 12px; min-width: 190px; }
.board h2 { margin: 0 0 6px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); font-weight: 600; }
.board ol { margin: 0; padding: 0; list-style: none; }
.board li { display: flex; justify-content: space-between; gap: 12px; padding: 1px 0; }
.board li.self { color: var(--accent); font-weight: 600; }
.board .rank { color: var(--muted); width: 1.4em; }
.board .nm { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.feed { top: 12px; left: 50%; transform: translateX(-50%); max-width: 340px; text-align: center; }
.feed div { padding: 1px 0; }
.feed .k { color: var(--accent); }
.feed .v { color: var(--danger); }

.wallet { bottom: 12px; left: 12px; min-width: 190px; }
.wallet .total { border-top: 1px solid var(--border); margin-top: 6px; padding-top: 6px; font-weight: 600; }

.controls { bottom: 12px; right: 12px; pointer-events: auto; text-align: right; }
.hint { color: var(--muted); font-size: 12px; margin-bottom: 8px; }
.btns { display: flex; gap: 8px; justify-content: flex-end; }

.btn {
  font: inherit;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid var(--border);
  padding: 9px 16px;
  cursor: pointer;
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  transition: background 0.15s, opacity 0.15s;
}
.btn:hover:not(:disabled) { background: rgba(255, 255, 255, 0.12); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn.primary { background: var(--accent); color: #06210f; border-color: transparent; }
.btn.primary:hover:not(:disabled) { background: #6ee79b; }

#overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(5, 7, 12, 0.82);
  backdrop-filter: blur(4px);
  z-index: 10;
}
#overlay[hidden] { display: none; }

.card {
  width: min(400px, calc(100vw - 32px));
  background: #11151f;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 26px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}
.card[hidden] { display: none; }

.card h1 { margin: 0 0 4px; font-size: 26px; letter-spacing: -0.02em; }
.card h2 { margin: 0 0 6px; font-size: 20px; }
.sub { margin: 0 0 18px; color: var(--muted); font-size: 13px; }

.field { display: block; margin-bottom: 12px; }
.field span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 5px; }
.field input {
  width: 100%;
  font: inherit;
  padding: 9px 11px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0b0e16;
  color: var(--text);
}
.field input:focus { outline: 2px solid rgba(74, 222, 128, 0.4); outline-offset: -1px; }

.presets { display: flex; gap: 6px; margin-bottom: 14px; flex-wrap: wrap; }
.presets button {
  font: inherit;
  font-size: 12px;
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  cursor: pointer;
}
.presets button:hover { background: rgba(255, 255, 255, 0.12); }

.bal { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.bal b { color: var(--text); }

#btn-play { width: 100%; }

.err { color: var(--danger); font-size: 13px; min-height: 18px; margin: 10px 0 0; }

.legal { color: #6b7688; font-size: 11px; line-height: 1.5; margin: 16px 0 0; border-top: 1px solid var(--border); padding-top: 12px; }

@media (max-width: 720px) {
  .board { display: none; }
  .controls { left: 12px; right: 12px; text-align: center; }
  .btns { justify-content: center; }
}