:root {
	--bg: #0b0f1a;
	--panel: #141a2a;
	--fg: #e6f1ff;
	--sub: #7f8ea3;
	--accent: #21d4fd;
	--accent2: #b721ff;
	--win: #2ee6a6;
	--lose: #ff6b6b;
	--grid: #2a3550;
	--line: #41527a
}

* {
	box-sizing: border-box
}

html,
body,
#app {
	height: 100%
}

body {
	margin: 0;
	background: radial-gradient(1200px 700px at 20% -10%, #17203a, transparent), radial-gradient(900px 600px at 120% 20%, #0b1a2a, transparent), var(--bg);
	color: var(--fg);
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
	-webkit-tap-highlight-color: transparent
}

.topbar,
.bottombar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 10px 14px;
	background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0));
	backdrop-filter: saturate(140%) blur(8px);
	position: sticky;
	z-index: 10
}

.topbar {
	top: 0
}

.bottombar {
	bottom: 0
}

.topbar h1 {
	font-size: 18px;
	margin: 0 10px 0 0
}

.topbar #turnLabel {
	color: var(--sub)
}

.topbar .right button {
	margin-left: 8px
}

button {
	border: 1px solid rgba(255, 255, 255, .12);
	background: linear-gradient(180deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .02));
	color: var(--fg);
	padding: 8px 10px;
	border-radius: 10px;
	cursor: pointer
}

button:active {
	transform: translateY(1px)
}

#stage {
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 12px
}

#board {
	width: min(96vmin, 900px);
	height: min(96vmin, 900px);
	max-width: 96vmin;
	max-height: 96vmin;
	border-radius: 12px;
	box-shadow: 0 10px 30px rgba(0, 0, 0, .45), 0 0 0 1px rgba(255, 255, 255, .07);
	background: radial-gradient(600px 500px at 20% 10%, rgba(33, 212, 253, .08), transparent), radial-gradient(900px 600px at 80% 100%, rgba(183, 33, 255, .06), transparent), linear-gradient(180deg, #0e1422, #0a0f1a)
}

#winOverlay {
	position: fixed;
	inset: 0;
	background: rgba(10, 14, 20, .6);
	backdrop-filter: blur(6px);
	display: flex;
	align-items: center;
	justify-content: center
}

#winOverlay[hidden] {
	display: none !important
}

.overlay-card {
	background: var(--panel);
	border: 1px solid rgba(255, 255, 255, .12);
	border-radius: 14px;
	padding: 20px 16px;
	min-width: 240px;
	box-shadow: 0 10px 30px rgba(0, 0, 0, .5)
}

.overlay-card h2 {
	margin: 4px 0 12px 0
}

.overlay-actions {
	display: flex;
	gap: 10px;
	justify-content: flex-end
}

/* iOS safe area */
@supports(padding:max(0px)) {
	.topbar {
		padding-top: max(10px, env(safe-area-inset-top))
	}

	.bottombar {
		padding-bottom: max(10px, env(safe-area-inset-bottom))
	}
}

/* Prevent long-press menus on iOS */
canvas,
button {
	-webkit-touch-callout: none;
	-webkit-user-select: none;
	user-select: none
}