/* ==========================================================================
   Neon Rogue — Space Theme v2.0
   Deep Space / Space Station HUD Redesign
   ========================================================================== */

/* ==========================================================================
   1. CSS CUSTOM PROPERTIES
   ========================================================================== */
:root {
	/* -- Deep space palette -- */
	--space-black: #030508;
	--space-deep: #060a10;
	--space-mid: #0c1220;
	--space-surface: #141c2e;
	--space-elevated: #1c2740;

	/* -- Accent colors -- */
	--accent-cyan: #00d4ff;
	--accent-cyan-dim: rgba(0, 212, 255, 0.12);
	--accent-cyan-glow: rgba(0, 212, 255, 0.4);
	--accent-blue: #3b82f6;
	--accent-blue-dim: rgba(59, 130, 246, 0.12);
	--accent-purple: #8b5cf6;
	--accent-rose: #f43f5e;
	--accent-rose-dim: rgba(244, 63, 94, 0.12);
	--accent-amber: #f59e0b;
	--accent-amber-dim: rgba(245, 158, 11, 0.12);
	--accent-green: #10b981;
	--accent-green-dim: rgba(16, 185, 129, 0.12);

	/* -- Health / danger -- */
	--health-high: #10b981;
	--health-mid: #f59e0b;
	--health-low: #f43f5e;

	/* -- Text -- */
	--text-bright: #e8edf5;
	--text-primary: #c5cfd9;
	--text-dim: #6b7a8d;
	--text-faint: #3d4f63;

	/* -- Glass panels -- */
	--glass-bg: rgba(10, 16, 28, 0.75);
	--glass-bg-heavy: rgba(6, 10, 16, 0.9);
	--glass-border: rgba(0, 212, 255, 0.08);
	--glass-border-hover: rgba(0, 212, 255, 0.2);

	/* -- HUD specific -- */
	--hud-ring-track: rgba(0, 212, 255, 0.1);
	--hud-ring-progress: var(--accent-cyan);

	/* -- Typography -- */
	--font-hud: 'Space Grotesk', 'Segoe UI', system-ui, sans-serif;
	--font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;

	/* -- Spacing -- */
	--panel-radius: 14px;
	--widget-radius: 12px;
	--btn-radius: 10px;

	/* -- Motion -- */
	--motion-fast: 120ms;
	--motion-mid: 260ms;
	--motion-slow: 500ms;
	--ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
	--ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   2. STARFIELD & BACKGROUND
   ========================================================================== */
@keyframes twinkle {
	0%, 100% { opacity: 0.3; }
	50% { opacity: 0.9; }
}

@keyframes nebula-drift {
	0% { transform: translate(0, 0) scale(1); }
	33% { transform: translate(20px, -15px) scale(1.02); }
	66% { transform: translate(-10px, 10px) scale(0.98); }
	100% { transform: translate(0, 0) scale(1); }
}

/* ==========================================================================
   3. RESET & BASE
   ========================================================================== */
*, *::before, *::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html, body {
	width: 100%;
	height: 100%;
	overflow: hidden;
}

body {
	font-family: var(--font-body);
	font-size: 14px;
	line-height: 1.5;
	color: var(--text-primary);
	background: var(--space-black);
	-webkit-font-smoothing: antialiased;
}

/* -- Deep space background with nebula -- */
body {
	background:
		radial-gradient(ellipse at 30% 40%, rgba(59, 130, 246, 0.06) 0%, transparent 60%),
		radial-gradient(ellipse at 70% 60%, rgba(139, 92, 246, 0.04) 0%, transparent 60%),
		radial-gradient(ellipse at 50% 20%, rgba(0, 212, 255, 0.03) 0%, transparent 50%),
		linear-gradient(180deg, var(--space-black) 0%, #040810 50%, var(--space-black) 100%);
	background-attachment: fixed;
}

/* -- Star layer 1: bright stars -- */
body::before {
	content: '';
	position: fixed;
	inset: 0;
	background:
		radial-gradient(1.5px 1.5px at 8% 15%, rgba(255,255,255,0.9) 100%, transparent 100%),
		radial-gradient(1px 1px at 22% 72%, rgba(255,255,255,0.7) 100%, transparent 100%),
		radial-gradient(1.5px 1.5px at 35% 28%, rgba(0,212,255,0.8) 100%, transparent 100%),
		radial-gradient(1px 1px at 48% 85%, rgba(255,255,255,0.6) 100%, transparent 100%),
		radial-gradient(1px 1px at 62% 12%, rgba(255,255,255,0.8) 100%, transparent 100%),
		radial-gradient(1.5px 1.5px at 78% 55%, rgba(139,92,246,0.6) 100%, transparent 100%),
		radial-gradient(1px 1px at 91% 38%, rgba(255,255,255,0.7) 100%, transparent 100%),
		radial-gradient(1px 1px at 15% 50%, rgba(255,255,255,0.5) 100%, transparent 100%),
		radial-gradient(1.5px 1.5px at 55% 45%, rgba(0,212,255,0.5) 100%, transparent 100%),
		radial-gradient(1px 1px at 85% 80%, rgba(255,255,255,0.6) 100%, transparent 100%),
		radial-gradient(1px 1px at 42% 62%, rgba(255,255,255,0.4) 100%, transparent 100%),
		radial-gradient(1px 1px at 68% 92%, rgba(255,255,255,0.5) 100%, transparent 100%);
	animation: twinkle 5s ease-in-out infinite alternate;
	pointer-events: none;
	z-index: 0;
}

/* -- Star layer 2: dimmer stars -- */
body::after {
	content: '';
	position: fixed;
	inset: 0;
	background:
		radial-gradient(1px 1px at 5% 82%, rgba(255,255,255,0.3) 100%, transparent 100%),
		radial-gradient(1px 1px at 18% 35%, rgba(255,255,255,0.25) 100%, transparent 100%),
		radial-gradient(1px 1px at 32% 95%, rgba(255,255,255,0.35) 100%, transparent 100%),
		radial-gradient(1px 1px at 58% 5%, rgba(255,255,255,0.2) 100%, transparent 100%),
		radial-gradient(1px 1px at 75% 70%, rgba(255,255,255,0.3) 100%, transparent 100%),
		radial-gradient(1px 1px at 95% 22%, rgba(255,255,255,0.25) 100%, transparent 100%);
	animation: twinkle 7s ease-in-out infinite alternate-reverse;
	pointer-events: none;
	z-index: 0;
}

/* ==========================================================================
   4. GAME SHELL
   ========================================================================== */
.game-shell {
	position: relative;
	z-index: 1;
	width: 100%;
	height: 100%;
	display: flex;
	align-items: center;
	justify-content: center;
}

.arena-wrap {
	position: relative;
	width: 100%;
	max-width: 1440px;
	aspect-ratio: 16 / 9;
}

/* ==========================================================================
   5. GAME STAGE & CANVAS
   ========================================================================== */
.game-stage {
	position: relative;
	width: 100%;
	height: 100%;
	border-radius: var(--panel-radius);
	overflow: hidden;
	border: 1px solid var(--glass-border);
	box-shadow:
		0 0 80px rgba(0, 212, 255, 0.03),
		0 20px 60px rgba(0, 0, 0, 0.5),
		inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

#gameCanvas {
	display: block;
	width: 100%;
	height: 100%;
}

/* ==========================================================================
   6. HUD LAYER
   ========================================================================== */
.hud-layer {
	position: absolute;
	inset: 0;
	pointer-events: none;
	z-index: 10;
	padding: 20px;
}

.hud-layer > * {
	pointer-events: auto;
}

/* -- HUD corner widgets -- */
.hud-corner {
	position: absolute;
	display: flex;
	flex-direction: column;
	gap: 10px;
}

.corner-top-left {
	top: 20px;
	left: 20px;
}

.corner-top-right {
	top: 20px;
	right: 20px;
	align-items: flex-end;
}

.corner-bottom-left {
	bottom: 20px;
	left: 20px;
}

/* ==========================================================================
   6b. WEAPON WIDGET — Equipped armament card
   ========================================================================== */
.weapon-card {
	--rarity-accent: var(--text-dim);
	background: var(--glass-bg);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border: 1px solid var(--glass-border);
	border-left: 3px solid var(--rarity-accent);
	border-radius: var(--widget-radius);
	padding: 8px 14px;
	min-width: 130px;
	display: flex;
	flex-direction: column;
	gap: 2px;
	transition: border-color var(--motion-mid) var(--ease-smooth);
}

.weapon-card[data-rarity="common"]    { --rarity-accent: #8b9dc9; }
.weapon-card[data-rarity="uncommon"]  { --rarity-accent: #50b4aa; }
.weapon-card[data-rarity="rare"]      { --rarity-accent: #648cff; }
.weapon-card[data-rarity="epic"]      { --rarity-accent: #a078ff; }
.weapon-card[data-rarity="legendary"] { --rarity-accent: #ffbe5a; }

.weapon-label {
	font-family: var(--font-hud);
	font-size: 0.6rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--text-dim);
}

.weapon-card strong {
	font-family: var(--font-hud);
	font-size: 0.85rem;
	font-weight: 700;
	color: var(--text-bright);
}

.weapon-rarity {
	font-family: var(--font-hud);
	font-size: 0.62rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--rarity-accent);
}

/* ==========================================================================
   6c. HUD FEEDBACK POPUPS — +credits / +HP floaters
   ========================================================================== */
.hud-feedback-active {
	position: relative;
}

.hud-feedback-active::after {
	content: attr(data-feedback);
	position: absolute;
	left: 50%;
	top: -6px;
	transform: translate(-50%, 0);
	font-family: var(--font-hud);
	font-size: 0.75rem;
	font-weight: 700;
	color: var(--accent-cyan);
	text-shadow: 0 0 8px var(--accent-cyan-glow), 0 1px 2px rgba(0, 0, 0, 0.8);
	pointer-events: none;
	white-space: nowrap;
	animation: hud-feedback-float 820ms var(--ease-smooth) forwards;
	z-index: 5;
}

@keyframes hud-feedback-float {
	0% {
		opacity: 0;
		transform: translate(-50%, 4px);
	}
	18% {
		opacity: 1;
	}
	75% {
		opacity: 1;
	}
	100% {
		opacity: 0;
		transform: translate(-50%, -18px);
	}
}

/* Critical health pulse on the vitals widget */
.health-core.critical {
	border-color: rgba(244, 63, 94, 0.55);
	animation: health-critical-pulse 1s ease-in-out infinite;
}

@keyframes health-critical-pulse {
	0%, 100% { box-shadow: 0 0 6px rgba(244, 63, 94, 0.15); }
	50% { box-shadow: 0 0 18px rgba(244, 63, 94, 0.5); }
}

/* ==========================================================================
   7. VITALS WIDGET — Health Ring
   ========================================================================== */
.health-core {
	width: 100px;
	background: var(--glass-bg);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border: 1px solid var(--glass-border);
	border-radius: var(--widget-radius);
	padding: 8px 10px;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 6px;
	transition: all var(--motion-mid) var(--ease-smooth);
}

.health-core:hover {
	border-color: var(--glass-border-hover);
	box-shadow: 0 0 20px rgba(0, 212, 255, 0.08);
}

/* Segmented health bar */
.health-segments {
	display: flex;
	gap: 2px;
	width: 100%;
}

.health-seg {
	flex: 1;
	height: 6px;
	border-radius: 2px;
	background: var(--health-low);
	box-shadow: 0 0 6px var(--accent-rose-dim), inset 0 1px 0 rgba(255,255,255,0.1);
	transition: background var(--motion-fast) var(--ease-smooth),
		box-shadow var(--motion-fast) var(--ease-smooth),
		opacity var(--motion-fast) var(--ease-smooth);
}

.health-seg.active-high {
	background: var(--health-high);
	box-shadow: 0 0 6px rgba(16, 185, 129, 0.3), inset 0 1px 0 rgba(255,255,255,0.15);
}

.health-seg.active-mid {
	background: var(--health-mid);
	box-shadow: 0 0 6px rgba(245, 158, 11, 0.3), inset 0 1px 0 rgba(255,255,255,0.15);
}

.health-seg.active-low {
	background: var(--health-low);
	box-shadow: 0 0 6px rgba(244, 63, 94, 0.3), inset 0 1px 0 rgba(255,255,255,0.15);
}

.health-seg.empty {
	background: var(--text-faint);
	box-shadow: none;
	opacity: 0.35;
}

.health-label {
	width: 100%;
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	line-height: 1;
}

.health-label-text {
	font-family: var(--font-hud);
	font-size: 0.55rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--text-dim);
}

.health-label strong {
	font-family: var(--font-hud);
	font-size: 0.7rem;
	font-weight: 700;
	color: var(--text-dim);
	transition: color var(--motion-fast) var(--ease-smooth);
}

/* ==========================================================================
   8. STAMINA RAIL
   ========================================================================== */
.stamina-rail {
	width: 100px;
	background: var(--glass-bg);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border: 1px solid var(--glass-border);
	border-radius: var(--widget-radius);
	padding: 10px 12px;
	transition: all var(--motion-mid) var(--ease-smooth);
}

.stamina-rail:hover {
	border-color: var(--glass-border-hover);
}

.stamina-head {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 6px;
}

.stamina-head span {
	font-family: var(--font-hud);
	font-size: 0.6rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--text-dim);
}

.stamina-head strong {
	font-family: var(--font-hud);
	font-size: 0.8rem;
	font-weight: 700;
	color: var(--accent-cyan);
}

.stamina-bar {
	width: 100%;
	height: 4px;
	background: rgba(0, 212, 255, 0.08);
	border-radius: 2px;
	overflow: hidden;
}

.stamina-fill {
	height: 100%;
	width: 100%;
	background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
	border-radius: 2px;
	transform-origin: left center;
	transition: transform var(--motion-fast) var(--ease-smooth),
		opacity var(--motion-fast) var(--ease-smooth);
	box-shadow: 0 0 6px var(--accent-cyan-glow);
}

/* Equipped weapon can't afford its next shot */
.stamina-rail.depleted {
	border-color: rgba(244, 63, 94, 0.4);
}

.stamina-rail.depleted .stamina-fill {
	background: linear-gradient(90deg, var(--accent-rose), var(--accent-amber));
	box-shadow: 0 0 6px rgba(244, 63, 94, 0.4);
}

.stamina-rail.depleted .stamina-head strong {
	color: var(--accent-rose);
}

/* ==========================================================================
   9. RUN WIDGET — Wallet & Depth Cards
   ========================================================================== */
.wallet-card,
.depth-card {
	background: var(--glass-bg);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border: 1px solid var(--glass-border);
	border-radius: var(--widget-radius);
	padding: 10px 16px;
	min-width: 120px;
	display: flex;
	flex-direction: column;
	gap: 2px;
	transition: all var(--motion-mid) var(--ease-spring);
}

.wallet-card:hover,
.depth-card:hover {
	transform: translateY(-2px);
	border-color: var(--glass-border-hover);
	box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.wallet-card span,
.depth-card span {
	font-family: var(--font-hud);
	font-size: 0.6rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--text-dim);
}

.wallet-card strong {
	font-family: var(--font-hud);
	font-size: 0.9rem;
	font-weight: 700;
	color: var(--accent-amber);
}

.depth-card strong {
	font-family: var(--font-hud);
	font-size: 0.9rem;
	font-weight: 700;
	color: var(--accent-purple);
}

/* ==========================================================================
   10. PAUSE BUTTON
   ========================================================================== */
.pause-chip {
	background: var(--glass-bg);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border: 1px solid var(--glass-border);
	border-radius: 8px;
	padding: 8px 14px;
	font-family: var(--font-hud);
	font-size: 0.85rem;
	font-weight: 600;
	color: var(--text-primary);
	cursor: pointer;
	transition: all var(--motion-fast) var(--ease-spring);
	letter-spacing: 0.1em;
}

.pause-chip:hover {
	background: rgba(0, 212, 255, 0.1);
	border-color: var(--glass-border-hover);
	color: var(--accent-cyan);
	transform: scale(1.05);
}

.pause-chip:active {
	transform: scale(0.96);
}

/* ==========================================================================
   11. PICKUP BUTTON
   ========================================================================== */
.pickup-btn {
	position: absolute;
	bottom: 100px;
	left: 50%;
	transform: translateX(-50%);
	background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
	border: none;
	border-radius: var(--btn-radius);
	padding: 12px 28px;
	font-family: var(--font-hud);
	font-size: 0.9rem;
	font-weight: 700;
	color: #fff;
	cursor: pointer;
	letter-spacing: 0.04em;
	box-shadow:
		0 4px 20px rgba(0, 212, 255, 0.3),
		0 0 40px rgba(0, 212, 255, 0.1);
	transition: all var(--motion-fast) var(--ease-spring);
	animation: pickup-btn-fade-in var(--motion-mid) var(--ease-spring);
}

.pickup-btn:hover {
	transform: translateX(-50%) translateY(-3px) scale(1.04);
	box-shadow:
		0 8px 30px rgba(0, 212, 255, 0.4),
		0 0 60px rgba(0, 212, 255, 0.15);
}

.pickup-btn:active {
	transform: translateX(-50%) translateY(0) scale(0.97);
}

/* ==========================================================================
   12. TOUCH CONTROLS
   ========================================================================== */
.touch-controls {
	position: absolute;
	bottom: 20px;
	left: 0; right: 0;
	display: none; /* shown on touch devices via JS/media query */
	justify-content: space-between;
	align-items: flex-end;
	padding: 0 24px;
	pointer-events: none;
	z-index: 20;
}

.touch-controls.visible {
	display: flex;
}

.dpad {
	display: grid;
	grid-template-areas:
		".  up  ."
		"le . ri"
		".  do  .";
	grid-template-columns: repeat(3, 56px);
	grid-template-rows: repeat(3, 56px);
	gap: 4px;
	pointer-events: auto;
}

.dpad button {
	background: var(--glass-bg);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border: 1px solid var(--glass-border);
	border-radius: 10px;
	color: var(--text-primary);
	font-family: var(--font-hud);
	font-size: 0.75rem;
	font-weight: 600;
	cursor: pointer;
	transition: all var(--motion-fast) var(--ease-spring);
}

.dpad button[data-touch="up"]    { grid-area: up; }
.dpad button[data-touch="down"]  { grid-area: do; }
.dpad button[data-touch="left"]  { grid-area: le; }
.dpad button[data-touch="right"] { grid-area: ri; }

.dpad button:hover {
	background: rgba(0, 212, 255, 0.12);
	border-color: var(--glass-border-hover);
	transform: scale(1.05);
}

.dpad button:active {
	transform: scale(0.93);
	background: rgba(0, 212, 255, 0.2);
}

.actions {
	display: flex;
	flex-direction: column;
	gap: 8px;
	pointer-events: auto;
}

.actions button {
	width: 64px;
	height: 64px;
	border-radius: 50%;
	background: var(--glass-bg);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border: 1px solid var(--glass-border);
	color: var(--text-primary);
	font-family: var(--font-hud);
	font-size: 0.75rem;
	font-weight: 700;
	cursor: pointer;
	transition: all var(--motion-fast) var(--ease-spring);
}

.actions button.accent {
	background: rgba(244, 63, 94, 0.15);
	border-color: rgba(244, 63, 94, 0.3);
	color: var(--accent-rose);
}

.actions button:hover {
	transform: scale(1.1);
	border-color: var(--glass-border-hover);
}

.actions button:active {
	transform: scale(0.92);
}

/* ==========================================================================
   13. OVERLAY SYSTEM
   ========================================================================== */
.overlay {
	position: fixed;
	inset: 0;
	z-index: 1000;
	display: flex;
	align-items: center;
	justify-content: center;
	background: var(--glass-bg-heavy);
	backdrop-filter: blur(20px);
	-webkit-backdrop-filter: blur(20px);
	animation: overlay-fade-in var(--motion-mid) var(--ease-smooth);
}

.overlay.hidden {
	display: none;
}

.overlay .panel {
	background: var(--glass-bg);
	backdrop-filter: blur(24px);
	-webkit-backdrop-filter: blur(24px);
	border: 1px solid var(--glass-border);
	border-radius: var(--panel-radius);
	padding: 40px;
	max-width: 520px;
	width: 90%;
	max-height: 85vh;
	overflow-y: auto;
	box-shadow:
		0 40px 100px rgba(0, 0, 0, 0.5),
		0 0 80px rgba(0, 212, 255, 0.03),
		inset 0 1px 0 rgba(255, 255, 255, 0.04);
	animation:
		panel-fade-in var(--motion-mid) var(--ease-spring),
		panel-glow-pulse 5s ease-in-out 1.5s infinite;
}

/* ==========================================================================
   14. PANEL TYPOGRAPHY
   ========================================================================== */
.panel h1 {
	font-family: var(--font-hud);
	font-size: 1.8rem;
	font-weight: 700;
	text-align: center;
	margin-bottom: 8px;
	background: linear-gradient(135deg, var(--text-bright) 0%, var(--accent-cyan) 100%);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	background-clip: text;
}

.panel h2 {
	font-family: var(--font-hud);
	font-size: 1.3rem;
	font-weight: 700;
	text-align: center;
	margin-bottom: 24px;
	color: var(--text-bright);
}

.panel p {
	text-align: center;
	color: var(--text-dim);
	font-size: 0.9rem;
	line-height: 1.6;
	margin-bottom: 16px;
}

/* ==========================================================================
   15. PANEL BUTTONS
   ========================================================================== */
.panel .btn-row {
	display: flex;
	gap: 12px;
	justify-content: center;
	flex-wrap: wrap;
	margin-top: 24px;
}

.panel button {
	background: rgba(255, 255, 255, 0.04);
	border: 1px solid var(--glass-border);
	border-radius: var(--btn-radius);
	padding: 12px 28px;
	font-family: var(--font-hud);
	font-size: 0.9rem;
	font-weight: 600;
	color: var(--text-primary);
	cursor: pointer;
	transition: all var(--motion-fast) var(--ease-spring);
	min-height: 44px;
}

.panel button:hover {
	background: rgba(0, 212, 255, 0.08);
	border-color: var(--glass-border-hover);
	color: var(--text-bright);
	transform: translateY(-2px);
	box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.panel button:active {
	transform: translateY(0) scale(0.97);
}

.panel button.primary {
	background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
	border: none;
	color: #fff;
	box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
	animation: button-glow 3s ease-in-out infinite;
	position: relative;
	overflow: hidden;
}

.panel button.primary::before {
	content: '';
	position: absolute;
	top: 0;
	left: -100%;
	width: 100%;
	height: 100%;
	background: linear-gradient(
		90deg,
		transparent,
		rgba(255, 255, 255, 0.15),
		transparent
	);
	animation: shimmer 4s ease-in-out infinite;
}

.panel button.primary:hover {
	box-shadow: 0 8px 30px rgba(0, 212, 255, 0.45);
	background: linear-gradient(135deg, #33dfff, var(--accent-cyan));
	animation: none;
}

.panel button.danger {
	background: rgba(244, 63, 94, 0.12);
	border-color: rgba(244, 63, 94, 0.25);
	color: var(--accent-rose);
}

.panel button.danger:hover {
	background: rgba(244, 63, 94, 0.2);
	border-color: rgba(244, 63, 94, 0.4);
}

/* ==========================================================================
   15b. TITLE SCREEN
   ========================================================================== */
.title-screen {
	text-align: center;
}

.title-brand {
	margin-bottom: 32px;
}

.panel-kicker {
	font-family: var(--font-hud);
	font-size: 0.7rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.15em;
	color: var(--text-faint);
	margin-bottom: 12px;
}

.title-heading {
	font-family: var(--font-hud);
	font-size: 3rem !important;
	font-weight: 800 !important;
	line-height: 1.1 !important;
	margin-bottom: 12px !important;
	background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 40%, var(--accent-purple) 100%) !important;
	-webkit-background-clip: text !important;
	-webkit-text-fill-color: transparent !important;
	background-clip: text !important;
	animation: title-glow 4s ease-in-out infinite alternate;
}

.title-tagline {
	font-size: 0.95rem;
	color: var(--text-dim);
	letter-spacing: 0.02em;
}

.title-actions {
	display: flex;
	gap: 16px;
	justify-content: center;
	margin-bottom: 24px;
}

.title-btn-primary {
	background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue)) !important;
	border: none !important;
	color: #fff !important;
	padding: 14px 36px !important;
	font-size: 1rem !important;
	font-weight: 700 !important;
	box-shadow: 0 4px 24px rgba(0, 212, 255, 0.3) !important;
}

.title-btn-primary:hover {
	box-shadow: 0 8px 36px rgba(0, 212, 255, 0.45) !important;
	transform: translateY(-3px) !important;
}

.title-btn-secondary {
	background: rgba(255, 255, 255, 0.04) !important;
	border: 1px solid var(--glass-border) !important;
	color: var(--text-primary) !important;
	padding: 14px 28px !important;
}

.title-footer {
	margin-top: 16px;
}

.field-label {
	display: block;
	font-family: var(--font-hud);
	font-size: 0.75rem;
	font-weight: 600;
	color: var(--text-dim);
	margin-bottom: 8px;
	text-transform: uppercase;
	letter-spacing: 0.06em;
}

.panel-input {
	width: 100%;
	background: rgba(255, 255, 255, 0.03);
	border: 1px solid var(--glass-border);
	border-radius: var(--btn-radius);
	padding: 10px 14px;
	font-family: var(--font-body);
	font-size: 0.9rem;
	color: var(--text-primary);
	outline: none;
	transition: all var(--motion-fast) var(--ease-smooth);
}

.panel-input:focus {
	border-color: var(--glass-border-hover);
	box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.08);
}

.panel-input::placeholder {
	color: var(--text-faint);
}

/* ==========================================================================
   15c. PAUSE SCREEN
   ========================================================================== */
.pause-screen {
	text-align: center;
}

.panel-header {
	margin-bottom: 24px;
}

.panel-title {
	margin-bottom: 0 !important;
}

.pause-stats {
	background: rgba(255, 255, 255, 0.02);
	border: 1px solid var(--glass-border);
	border-radius: var(--widget-radius);
	padding: 16px;
	margin-bottom: 20px;
}

.panel-grid {
	display: grid;
	gap: 12px;
}

.panel-grid-2 {
	grid-template-columns: repeat(2, 1fr);
}

.overlay-stat {
	background: rgba(255, 255, 255, 0.02);
	border: 1px solid rgba(255, 255, 255, 0.04);
	border-radius: 8px;
	padding: 12px;
	transition: all var(--motion-fast) var(--ease-smooth);
}

.overlay-stat:hover {
	background: rgba(255, 255, 255, 0.04);
	border-color: var(--glass-border);
}

.overlay-stat span {
	display: block;
	font-size: 0.7rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--text-dim);
	margin-bottom: 4px;
}

.overlay-stat strong {
	display: block;
	font-family: var(--font-hud);
	font-size: 0.95rem;
	font-weight: 700;
	color: var(--text-bright);
}

.pause-controls-ref {
	background: rgba(255, 255, 255, 0.02);
	border: 1px solid var(--glass-border);
	border-radius: var(--widget-radius);
	padding: 16px;
	margin-bottom: 20px;
	text-align: left;
}

.controls-label {
	display: block;
	font-family: var(--font-hud);
	font-size: 0.75rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--text-dim);
	margin-bottom: 10px;
}

.controls-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 6px;
}

.controls-grid span {
	font-size: 0.8rem;
	color: var(--text-primary);
}

.controls-grid kbd {
	display: inline-block;
	background: rgba(255, 255, 255, 0.06);
	border: 1px solid var(--glass-border);
	border-radius: 4px;
	padding: 2px 6px;
	font-family: var(--font-hud);
	font-size: 0.7rem;
	font-weight: 600;
	color: var(--accent-cyan);
	margin-right: 4px;
}

.pause-actions {
	text-align: center;
}

.pause-info-box {
	background: rgba(0, 212, 255, 0.04);
	border: 1px solid var(--glass-border);
	border-radius: var(--widget-radius);
	padding: 14px 16px;
	margin-bottom: 20px;
	text-align: left;
}

.pause-info-box p {
	text-align: left;
	font-size: 0.82rem;
	margin-bottom: 8px;
}

.pause-info-box p:last-child {
	margin-bottom: 0;
}

.pause-info-box strong {
	color: var(--accent-rose);
}

.pause-btn-primary {
	background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue)) !important;
	border: none !important;
	color: #fff !important;
	padding: 14px 36px !important;
	font-size: 1rem !important;
	font-weight: 700 !important;
	box-shadow: 0 4px 24px rgba(0, 212, 255, 0.3) !important;
	width: 100%;
	margin-bottom: 12px;
}

.pause-btn-secondary {
	background: rgba(255, 255, 255, 0.04) !important;
	border: 1px solid var(--glass-border) !important;
	color: var(--text-primary) !important;
	width: 100%;
	margin-bottom: 16px;
}

.pause-actions-bottom {
	display: flex;
	gap: 12px;
	justify-content: center;
}

.pause-btn-quit {
	background: rgba(244, 63, 94, 0.1) !important;
	border: 1px solid rgba(244, 63, 94, 0.2) !important;
	color: var(--accent-rose) !important;
}

.pause-btn-quit:hover {
	background: rgba(244, 63, 94, 0.2) !important;
	border-color: rgba(244, 63, 94, 0.4) !important;
}

.pause-btn-link {
	align-self: center;
	font-size: 0.85rem;
	color: var(--text-dim);
	text-decoration: none;
	transition: color var(--motion-fast) var(--ease-smooth);
}

.pause-btn-link:hover {
	color: var(--text-bright);
}

/* ==========================================================================
   15d. RUN END SCREEN (Game Over / Victory)
   ========================================================================== */
.actions-row {
	display: flex;
	gap: 12px;
	justify-content: center;
	margin-top: 20px;
}

/* ==========================================================================
   16. UPGRADE CARDS
   ========================================================================== */
.upgrade-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
	gap: 12px;
	margin: 20px 0;
}

.upgrade-card {
	background: rgba(255, 255, 255, 0.02);
	border: 1px solid var(--glass-border);
	border-radius: var(--widget-radius);
	padding: 16px;
	text-align: center;
	cursor: pointer;
	transition: all var(--motion-fast) var(--ease-spring);
}

.upgrade-card:hover {
	background: rgba(0, 212, 255, 0.05);
	border-color: var(--glass-border-hover);
	transform: translateY(-3px);
	box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.upgrade-card:active {
	transform: translateY(0) scale(0.97);
}

.upgrade-card:disabled {
	opacity: 0.45;
	cursor: not-allowed;
}

.upgrade-card:disabled:hover {
	background: rgba(255, 255, 255, 0.02);
	transform: none;
	box-shadow: none;
	border-color: var(--glass-border);
}

.upgrade-card .upgrade-head {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	gap: 8px;
	margin-bottom: 6px;
}

.upgrade-card .upgrade-head strong {
	font-family: var(--font-hud);
	font-size: 0.8rem;
	font-weight: 700;
	color: var(--text-bright);
	text-align: left;
}

.upgrade-card .upgrade-head em {
	font-style: normal;
	font-family: var(--font-hud);
	font-size: 0.65rem;
	font-weight: 600;
	color: var(--accent-cyan);
	background: var(--accent-cyan-dim);
	border-radius: 4px;
	padding: 2px 6px;
	white-space: nowrap;
}

.upgrade-card .upgrade-desc {
	display: block;
	font-size: 0.7rem;
	color: var(--text-dim);
	line-height: 1.4;
	text-align: left;
	margin-bottom: 10px;
}

.upgrade-card .upgrade-foot {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	border-top: 1px solid rgba(255, 255, 255, 0.05);
	padding-top: 8px;
}

.upgrade-card .upgrade-foot small {
	font-size: 0.6rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--text-faint);
}

.upgrade-card .upgrade-foot b {
	font-family: var(--font-hud);
	font-size: 0.75rem;
	font-weight: 700;
	color: var(--accent-amber);
}

/* ==========================================================================
   17. STATS TABLE IN PANELS
   ========================================================================== */
.panel .stats-table {
	width: 100%;
	margin: 16px 0;
}

.panel .stats-table .stat-row {
	display: flex;
	justify-content: space-between;
	padding: 10px 16px;
	border-radius: 8px;
	transition: background var(--motion-fast) var(--ease-smooth);
}

.panel .stats-table .stat-row:hover {
	background: rgba(255, 255, 255, 0.03);
}

.panel .stats-table .stat-label {
	font-size: 0.85rem;
	color: var(--text-dim);
}

.panel .stats-table .stat-value {
	font-family: var(--font-hud);
	font-size: 0.85rem;
	font-weight: 700;
	color: var(--text-bright);
}

/* ==========================================================================
   18. SETTINGS PANEL
   ========================================================================== */
.settings-group {
	margin-bottom: 20px;
}

.settings-group label {
	display: block;
	font-family: var(--font-hud);
	font-size: 0.8rem;
	font-weight: 600;
	color: var(--text-dim);
	margin-bottom: 8px;
	text-transform: uppercase;
	letter-spacing: 0.05em;
}

.settings-group input[type="range"] {
	width: 100%;
	height: 6px;
	-webkit-appearance: none;
	appearance: none;
	background: rgba(255, 255, 255, 0.06);
	border-radius: 3px;
	outline: none;
}

.settings-group input[type="range"]::-webkit-slider-thumb {
	-webkit-appearance: none;
	width: 18px;
	height: 18px;
	background: var(--accent-cyan);
	border-radius: 50%;
	cursor: pointer;
	box-shadow: 0 0 10px var(--accent-cyan-glow);
}

.settings-group input[type="range"]::-moz-range-thumb {
	width: 18px;
	height: 18px;
	background: var(--accent-cyan);
	border-radius: 50%;
	cursor: pointer;
	border: none;
	box-shadow: 0 0 10px var(--accent-cyan-glow);
}

/* ==========================================================================
   19. KEYFRAMES
   ========================================================================== */
@keyframes panel-fade-in {
	from {
		opacity: 0;
		transform: scale(0.94) translateY(10px);
	}
	to {
		opacity: 1;
		transform: scale(1) translateY(0);
	}
}

@keyframes pickup-btn-fade-in {
	from {
		opacity: 0;
		transform: translateX(-50%) scale(0.94) translateY(10px);
	}
	to {
		opacity: 1;
		transform: translateX(-50%) scale(1) translateY(0);
	}
}

@keyframes overlay-fade-in {
	from { opacity: 0; }
	to { opacity: 1; }
}

@keyframes hud-flash-green {
	0% { box-shadow: 0 0 0 0 transparent; }
	50% { box-shadow: 0 0 16px 4px rgba(16, 185, 129, 0.5); }
	100% { box-shadow: 0 0 0 0 transparent; }
}

@keyframes hud-flash-red {
	0% { box-shadow: 0 0 0 0 transparent; }
	50% { box-shadow: 0 0 16px 4px rgba(244, 63, 94, 0.5); }
	100% { box-shadow: 0 0 0 0 transparent; }
}

@keyframes title-glow {
	0% {
		filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.3));
	}
	50% {
		filter: drop-shadow(0 0 25px rgba(0, 212, 255, 0.6)) drop-shadow(0 0 50px rgba(108, 99, 255, 0.3));
	}
	100% {
		filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.3));
	}
}

@keyframes panel-glow-pulse {
	0% {
		box-shadow:
			0 40px 100px rgba(0, 0, 0, 0.5),
			0 0 80px rgba(0, 212, 255, 0.03),
			inset 0 1px 0 rgba(255, 255, 255, 0.04);
	}
	50% {
		box-shadow:
			0 40px 100px rgba(0, 0, 0, 0.5),
			0 0 100px rgba(0, 212, 255, 0.08),
			0 0 140px rgba(108, 99, 255, 0.04),
			inset 0 1px 0 rgba(255, 255, 255, 0.06);
	}
	100% {
		box-shadow:
			0 40px 100px rgba(0, 0, 0, 0.5),
			0 0 80px rgba(0, 212, 255, 0.03),
			inset 0 1px 0 rgba(255, 255, 255, 0.04);
	}
}

@keyframes button-glow {
	0% {
		box-shadow: 0 4px 20px rgba(0, 212, 255, 0.2);
	}
	50% {
		box-shadow: 0 4px 30px rgba(0, 212, 255, 0.35), 0 0 40px rgba(0, 212, 255, 0.1);
	}
	100% {
		box-shadow: 0 4px 20px rgba(0, 212, 255, 0.2);
	}
}

@keyframes stat-row-highlight {
	0% {
		background: rgba(0, 212, 255, 0.08);
	}
	100% {
		background: transparent;
	}
}

@keyframes shimmer {
	0% {
		background-position: -200% 0;
	}
	100% {
		background-position: 200% 0;
	}
}

/* ==========================================================================
   20. HUD FEEDBACK STATES
   ========================================================================== */
.hud-flash-green {
	animation: hud-flash-green 400ms var(--ease-smooth);
}

.hud-flash-red {
	animation: hud-flash-red 400ms var(--ease-smooth);
}

/* ==========================================================================
   21. UTILITY CLASSES
   ========================================================================== */
.hidden { display: none !important; }

/* ==========================================================================
   22. SCROLLBAR (for panel overflow)
   ========================================================================== */
.panel::-webkit-scrollbar {
	width: 6px;
}

.panel::-webkit-scrollbar-track {
	background: transparent;
}

.panel::-webkit-scrollbar-thumb {
	background: var(--space-elevated);
	border-radius: 3px;
}

.panel::-webkit-scrollbar-thumb:hover {
	background: var(--accent-cyan);
}

/* ==========================================================================
   23. RESPONSIVE
   ========================================================================== */
@media (max-width: 1024px) {
	.arena-wrap {
		max-width: 100%;
	}

	.hud-corner {
		transform: scale(0.85);
		transform-origin: top left;
	}

	.corner-top-right {
		transform-origin: top right;
	}
}

@media (max-width: 768px) {
	.hud-corner {
		transform: scale(0.7);
	}

	.panel {
		padding: 24px;
		width: 95%;
	}

	.panel h1 {
		font-size: 1.4rem;
	}

	.upgrade-grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (max-width: 480px) {
	.hud-corner {
		transform: scale(0.55);
	}

	.panel {
		padding: 20px;
	}

	.upgrade-grid {
		grid-template-columns: 1fr;
	}

	.panel .btn-row {
		flex-direction: column;
	}

	.panel button {
		width: 100%;
	}
}

/* ==========================================================================
   24. TOUCH DEVICE DETECTION
   ========================================================================== */
@media (hover: none) and (pointer: coarse) {
	.touch-controls {
		display: flex;
	}

	/* The d-pad occupies the bottom-left on touch devices */
	.corner-bottom-left {
		display: none;
	}
}

/* ==========================================================================
   25. ACCESSIBILITY
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
	*, *::before, *::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
	}

	body::before, body::after {
		animation: none;
	}
}

/* Same rules, driven by the in-game "Reduced Motion" setting */
.reduced-motion *, .reduced-motion *::before, .reduced-motion *::after {
	animation-duration: 0.01ms !important;
	animation-iteration-count: 1 !important;
	transition-duration: 0.01ms !important;
}

.reduced-motion body::before, .reduced-motion body::after {
	animation: none;
}

:focus-visible {
	outline: 2px solid var(--accent-cyan);
	outline-offset: 3px;
}

/* ==========================================================================
   26. HIGH DPR SUPPORT
   ========================================================================== */
@media (min-resolution: 2dppx) {
	.game-stage {
		-webkit-font-smoothing: subpixel-antialiased;
	}
}