:root {
	--primary: #00ff00;
	--danger: #ff0000;
	--bg: #050505;
	--ui-bg: #1a1a1a;
}

body {
	font-family: 'Courier New', Courier, monospace;
	background-color: var(--bg);
	color: var(--primary); /* TEXT NOW GREEN */
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	height: 100vh;
	margin: 0;
	overflow: hidden;
	user-select: none;
}

/* HUD */
.hud {
	display: flex;
	justify-content: space-between;
	width: 90%;
	max-width: 600px;
	margin-bottom: 1rem;
	padding: 1rem;
	background: var(--ui-bg);
	border: 2px solid #333;
	border-radius: 8px;
	font-size: 1.2rem;
	font-weight: bold;
	color: var(--primary);
}

.stat-box {
	text-align: center;
}

.stat-label {
	display: block;
	font-size: 0.8rem;
	color: #6aff6a; /* Slightly dimmer green */
	margin-bottom: 4px;
}

/* Game Area */
#game-board {
	position: relative;
	width: 90%;
	max-width: 600px;
	height: 600px;
	background: radial-gradient(circle at bottom, #111 0%, #000 100%);
	border: 2px solid #333;
	overflow: hidden;
	margin-bottom: 1rem;
}

/* Aliens */
.alien {
	position: absolute;
	width: 30px;
	height: 30px;
	background-color: var(--primary);
	border-radius: 50%;
	transform: translate(-50%, -50%);
	box-shadow: 0 0 10px var(--primary);
	transition: top 0.1s linear, left 0.1s linear;
}

.alien.danger {
	background-color: var(--danger);
	box-shadow: 0 0 15px var(--danger);
}

/* Cannon Button */
#cannon-btn {
	width: 120px;
	height: 120px;
	background: #333;
	border: 4px solid var(--primary);
	border-radius: 50%;
	color: var(--primary);
	font-size: 1.5rem;
	font-weight: bold;
	cursor: pointer;
	transition: all 0.1s;
	display: flex;
	align-items: center;
	justify-content: center;
	box-shadow: 0 0 20px rgba(0,255,0,0.3);
	text-transform: uppercase;
	position: relative;
	z-index: 10;
}

#cannon-btn:active {
	transform: scale(0.95);
	background: #444;
	box-shadow: 0 0 30px rgba(0,255,0,0.6);
}

#cannon-btn.misfire {
	border-color: var(--danger);
	color: var(--danger);
	box-shadow: 0 0 20px rgba(255,0,0,0.5);
}

/* Hit Zone */
.hit-zone {
	position: absolute;
	bottom: 0;
	left: 50%;
	transform: translateX(-50%);
	width: 120px;
	height: 100%;
	border-left: 1px dashed #333;
	border-right: 1px dashed #333;
	pointer-events: none;
	background: linear-gradient(to bottom, transparent 80%, rgba(0,255,0,0.1) 100%);
}

/* Screen Reader Only */
.screen-reader-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

/* Overlay */
#start-overlay {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: rgba(0,0,0,0.85);
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	z-index: 100;
	text-align: center;
	padding: 1rem;
	color: var(--primary);
}

/* Glow for H1 */
#start-overlay h1,
h1 {
	color: var(--primary);
	text-shadow:
		0 0 4px #00ff00,
		0 0 12px #00cc00,
		0 0 20px #009900;
}

/* Primary Buttons */
.btn-primary {
	background: var(--primary);
	color: black;
	border: none;
	padding: 1rem 2rem;
	font-size: 1.5rem;
	font-weight: bold;
	cursor: pointer;
	margin-top: 2rem;
	border-radius: 4px;
}

/* Laser Beam */
.laser-beam {
	position: absolute;
	left: 50%;
	bottom: 0;
	transform: translateX(-50%);
	width: 4px;
	background: #00ff00;
	box-shadow: 0 0 8px #00ff00;
	animation: laserFade 0.15s linear forwards;
	pointer-events: none;
	z-index: 20; /* ensure it sits above aliens */
}

/* Correct Explosion Effect */
.alien-explode {
	position: absolute;
	width: 40px;
	height: 40px;
	border-radius: 50%;
	background: radial-gradient(circle, #ffeb3b, #ff5722, #d84315);
	box-shadow: 0 0 20px 10px rgba(255, 87, 34, 0.7);
	transform: translate(-50%, -50%);
	animation: explodeAnim 0.5s ease-out forwards;
	pointer-events: none;
	z-index: 30; /* above aliens and beam */
}