:root {
  color-scheme: light;
  --page: #d8ddcf;
  --panel: #f4f1e6;
  --panel-strong: #ece7d9;
  --line: #b9c0ad;
  --text-main: #16392a;
  --text-soft: #5e705f;
  --board: #1f6a49;
  --board-line: rgba(255, 255, 255, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Trebuchet MS", "Gill Sans", sans-serif;
  color: var(--text-main);
  background: var(--page);
}

.app-shell {
  width: min(100%, 460px);
  min-height: 100dvh;
  margin: 0 auto;
  padding: max(8px, env(safe-area-inset-top)) 8px max(10px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.topbar {
  display: grid;
  grid-template-columns: 1.08fr repeat(3, minmax(0, 1fr));
  gap: 6px;
  align-items: stretch;
}

.topbar-btn,
.topbar-stat {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}

.topbar-btn {
  appearance: none;
  color: var(--text-main);
  font: inherit;
  font-size: 0.92rem;
  font-weight: 700;
}

.topbar-btn:active {
  background: var(--text-main);
  color: var(--panel);
}

.topbar-stat {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 5px 8px;
}

.topbar-stat span {
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  color: var(--text-soft);
  text-transform: uppercase;
}

.topbar-stat strong {
  margin-top: 2px;
  font-size: 0.94rem;
  line-height: 1;
  white-space: nowrap;
}

.game-layout {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 8px;
}

.board-shell {
  position: relative;
  flex: 0 0 auto;
  height: min(63dvh, 432px);
  min-height: 376px;
  border-radius: 24px;
  border: 1px solid #2e6f52;
  overflow: hidden;
  background: linear-gradient(180deg, var(--board) 0%, #267552 100%);
}

.board-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(var(--board-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--board-line) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.14;
}

.board-shell::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), transparent 18%);
}

#gameCanvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

.message {
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(244, 241, 230, 0.72);
  color: var(--text-soft);
  font-size: 0.88rem;
  line-height: 1.32;
}