* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(56, 189, 248, 0.16), transparent 34%),
    linear-gradient(180deg, #0f172a 0%, #020617 100%);
  color: #f9fafb;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
}

.game-shell {
  width: min(100vw, 480px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 12px;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 8px;
}

.topbar,
.playfield,
.thumb-zone {
  border: 1px solid #334155;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.78);
  box-shadow: 0 18px 40px rgba(2, 6, 23, 0.28);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
}

.topbar-copy {
  display: grid;
  gap: 2px;
}

.eyebrow,
.control-label,
.label {
  color: #94a3b8;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.title {
  font-size: 22px;
  line-height: 1;
}

#restart,
.touch-controls button {
  border: 1px solid #38bdf8;
  border-radius: 14px;
  background: linear-gradient(180deg, #38bdf8, #0284c7);
  color: #e0f2fe;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.playfield {
  min-height: 0;
  padding: 10px;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 8px;
}

.hud {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  align-items: stretch;
}

.stat-card,
.status-wrap {
  border: 1px solid rgba(71, 85, 105, 0.9);
  border-radius: 14px;
  background: rgba(30, 41, 59, 0.9);
  min-height: 0;
  display: grid;
  gap: 2px;
  align-content: center;
  padding: 8px 10px;
}

.status-wrap {
  grid-column: 1 / -1;
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.96), rgba(15, 23, 42, 0.96));
}

.status-wrap[data-tone="milestone"] {
  border-color: #f59e0b;
  box-shadow: inset 0 0 0 1px rgba(245, 158, 11, 0.16);
}

.status-wrap[data-tone="warning"] {
  border-color: #fb7185;
  box-shadow: inset 0 0 0 1px rgba(251, 113, 133, 0.16);
}

.hud strong {
  font-size: 18px;
  line-height: 1.1;
}

#status {
  font-size: 16px;
  line-height: 1.25;
}

#restart,
.touch-controls button {
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

#restart {
  padding: 10px 14px;
  white-space: nowrap;
}

#restart:hover,
#restart:focus-visible,
.touch-controls button:hover,
.touch-controls button:focus-visible {
  filter: brightness(1.08);
}

.board-wrap {
  min-height: 0;
  display: grid;
  align-items: center;
  justify-items: center;
}

#game {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 2;
  border: 1px solid #334155;
  border-radius: 16px;
  background: #020617;
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.08);
}

.touch-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr);
  gap: 8px;
}

.thumb-zone {
  padding: 10px;
  display: grid;
  gap: 8px;
}

.move-row,
.action-grid {
  display: grid;
  gap: 7px;
}

.move-row {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.action-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.touch-controls button {
  min-height: 64px;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
}

@media (max-width: 520px) {
  body {
    min-height: 100svh;
  }

  .game-shell {
    min-height: 100svh;
    padding: 8px 8px 10px;
    gap: 7px;
  }

  .topbar,
  .playfield,
  .thumb-zone {
    border-radius: 16px;
  }

  .topbar {
    padding: 8px 10px;
  }

  .title {
    font-size: 20px;
  }

  .playfield {
    padding: 8px;
    gap: 7px;
  }

  .hud {
    gap: 5px;
  }

  .stat-card,
  .status-wrap {
    padding: 7px 9px;
  }

  .hud strong {
    font-size: 17px;
  }

  #status {
    font-size: 15px;
  }

  #game {
    max-height: calc(100svh - 268px);
  }

  .touch-controls {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .thumb-zone {
    padding: 9px;
  }

  .action-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .touch-controls button {
    min-height: 58px;
  }
}