:root {
  --bg: #0a0e16;
  --panel: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.18);
  --ink: #e8edf6;
  --muted: #98a2b8;
  --accent: #818cf8;
  --accent-2: #22d3ee;
  --good: #34d399;
  --bad: #ef4444;
  --grad: linear-gradient(100deg, #a5b4fc, #818cf8 40%, #22d3ee);
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo,
    Consolas, monospace;
}

* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.top {
  text-align: center;
  padding: 28px 16px 6px;
}
.brand {
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: 0.28em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.logo {
  -webkit-text-fill-color: initial;
  color: var(--accent-2);
}
.tag {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

main {
  width: 100%;
  max-width: 620px;
  padding: 0 16px;
}

.hud {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 18px 0 12px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.stat b {
  color: var(--ink);
  margin-left: 4px;
}
.spacer {
  flex: 1;
}
.btn {
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: #08111b;
  background: var(--grad);
  border: none;
  border-radius: 9px;
  padding: 8px 14px;
  cursor: pointer;
  transition:
    transform 0.08s ease,
    box-shadow 0.2s ease;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}
.btn.ghost {
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--border-strong);
}
.btn.ghost:hover {
  border-color: var(--accent);
  box-shadow: none;
}

.stage {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  overflow: hidden;
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(129, 140, 248, 0.05);
}
#field {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: crosshair;
}

.win {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(8, 11, 18, 0.45);
  backdrop-filter: blur(3px);
  transition: opacity 0.25s ease;
}
.win.hidden {
  opacity: 0;
  pointer-events: none;
}
.win-card {
  text-align: center;
  background: rgba(14, 19, 32, 0.92);
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  padding: 22px 26px;
  display: grid;
  gap: 14px;
}
.win-card strong {
  font-size: 1.4rem;
  letter-spacing: 0.1em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.how {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 16px 2px 0;
  line-height: 1.7;
}
.how b {
  color: var(--ink);
}
.how .lit {
  color: var(--good);
}
.how .dark {
  color: var(--bad);
}
.how .muted {
  display: block;
  margin-top: 4px;
  opacity: 0.8;
}

.foot {
  margin: auto 0 22px;
  padding-top: 26px;
  color: var(--muted);
  font-size: 0.78rem;
}
.foot a {
  color: var(--accent-2);
}