/* ============================================================
   NEON SURVIVOR — style.css  (Phase 2)
   Cyberpunk/Neon Arcade Visual Design System
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Rajdhani:wght@300;400;500;600;700&family=Share+Tech+Mono&display=swap');

/* ── CSS Custom Properties ── */
:root {
    --neon-cyan:     #00f5ff;
    --neon-purple:   #b300ff;
    --neon-pink:     #ff007f;
    --neon-green:    #39ff14;
    --neon-yellow:   #ffff00;
    --neon-orange:   #ff6600;
    --dark-bg:       #050510;
    --dark-surface:  #0a0a1a;
    --dark-panel:    #0d0d2a;
    --dark-border:   #1a1a3a;
    --text-primary:  #ffffff;
    --text-dim:      #7a7aaa;
    --text-muted:    #3a3a6a;

    --glow-cyan:   0 0 10px #00f5ff, 0 0 20px #00f5ff40, 0 0 40px #00f5ff20;
    --glow-purple: 0 0 10px #b300ff, 0 0 20px #b300ff40, 0 0 40px #b300ff20;
    --glow-pink:   0 0 10px #ff007f, 0 0 20px #ff007f40, 0 0 40px #ff007f20;
    --glow-green:  0 0 10px #39ff14, 0 0 20px #39ff1440;
    --glow-yellow: 0 0 10px #ffff00, 0 0 20px #ffff0040;
    --glow-orange: 0 0 10px #ff6600, 0 0 20px #ff660040;

    --font-display: 'Orbitron', 'Courier New', monospace;
    --font-ui:      'Rajdhani', 'Arial', sans-serif;
    --font-mono:    'Share Tech Mono', 'Courier New', monospace;

    --transition-fast: 0.15s ease;
    --transition-med:  0.3s ease;
    --transition-slow: 0.6s ease;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
    width: 100%; height: 100%; overflow: hidden;
    background: var(--dark-bg); color: var(--text-primary);
    font-family: var(--font-ui); -webkit-font-smoothing: antialiased; user-select: none;
}

/* ── Game Container ── */
.game-container {
    position: relative; width: 100vw; height: 100vh;
    overflow: hidden; display: flex; align-items: center; justify-content: center;
}

/* ── Screens ── */
.screen { position: absolute; inset: 0; display: none; opacity: 0; transition: opacity var(--transition-med); }
.screen.active { display: flex; opacity: 1; }
.screen.fade-in { animation: fadeIn 0.4s ease forwards; }

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.98); }
    to   { opacity: 1; transform: scale(1); }
}

/* ============================================================
   DEVELOPER SPLASH
   ============================================================ */
.splash-screen { background: var(--dark-bg); z-index: 200; flex-direction: column; justify-content: center; align-items: center; }
.splash-scanlines { position: absolute; inset: 0; pointer-events: none; background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,0.15) 2px, rgba(0,0,0,0.15) 4px); z-index: 1; }
.splash-content { position: relative; z-index: 2; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 20px; }
.splash-label, .splash-with { font-family: var(--font-display); font-size: clamp(0.7rem, 2vw, 1rem); letter-spacing: 0.3em; color: var(--neon-cyan); text-shadow: var(--glow-cyan); opacity: 0; }
.splash-developer { font-family: var(--font-display); font-size: clamp(2rem, 5vw, 4rem); font-weight: 900; letter-spacing: 0.1em; color: var(--text-primary); text-shadow: 0 0 10px rgba(0,245,255,0.8), 0 0 20px rgba(179,0,255,0.6); margin: 8px 0; opacity: 0; text-transform: uppercase; }
.splash-ai { font-family: var(--font-mono); font-size: clamp(1.2rem, 3.5vw, 2rem); letter-spacing: 0.2em; color: var(--neon-purple); text-shadow: var(--glow-purple); opacity: 0; font-weight: 700; }
.splash-skip { position: absolute; bottom: 40px; font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-dim); letter-spacing: 0.2em; z-index: 2; opacity: 0; animation: splashSkipFade 1s ease 1s forwards, hsBlink 2s infinite 2s; }
.splash-skip .mobile-text { display: none; }
@media (max-width: 768px) { .splash-skip .desktop-text { display: none; } .splash-skip .mobile-text { display: inline; } }
@keyframes splashSkipFade { to { opacity: 0.7; } }

/* CSS Animations for Splash Elements triggered by JS classes */
.splash-fade-in { animation: splashFadeIn 0.5s ease forwards; }
.splash-glitch { animation: splashFadeIn 0.3s ease forwards, splashGlitch 0.2s 0.3s; }
.splash-ai-reveal { animation: aiReveal 0.6s ease forwards; }

@keyframes splashFadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes splashGlitch { 
    0% { transform: translate(0); text-shadow: 0 0 10px rgba(0,245,255,0.8); }
    20% { transform: translate(-3px, 2px); text-shadow: -2px 0 #ff007f, 2px 0 #00f5ff; }
    40% { transform: translate(3px, -2px); text-shadow: 2px 0 #ff007f, -2px 0 #00f5ff; }
    60% { transform: translate(-2px, -1px); text-shadow: -2px 0 #ff007f, 2px 0 #00f5ff; }
    80% { transform: translate(2px, 2px); text-shadow: 2px 0 #ff007f, -2px 0 #00f5ff; }
    100% { transform: translate(0); text-shadow: 0 0 10px rgba(0,245,255,0.8), 0 0 20px rgba(179,0,255,0.6); }
}
@keyframes aiReveal { from { opacity: 0; filter: blur(4px); } to { opacity: 1; filter: blur(0); } }

/* ============================================================
   MAIN MENU
   ============================================================ */
#main-menu { align-items: center; justify-content: center; flex-direction: column; min-height: 100dvh; min-height: 100vh; padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left); box-sizing: border-box; }
#menu-bg-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.menu-scanlines {
    position: absolute; inset: 0; z-index: 1;
    background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,0.08) 2px, rgba(0,0,0,0.08) 4px);
    pointer-events: none;
}

.menu-content { position: relative; z-index: 2; display: flex; flex-direction: column; align-items: center; gap: clamp(12px, 3vh, 32px); padding: clamp(10px, 4vh, 40px); width: 100%; max-width: 800px; box-sizing: border-box; }

/* Logo */
.logo-container { position: relative; text-align: center; }
.logo-glow {
    position: absolute; inset: -40px;
    background: radial-gradient(ellipse at center, #00f5ff10 0%, transparent 70%);
    pointer-events: none; animation: logoGlow 3s ease-in-out infinite alternate;
}
@keyframes logoGlow {
    from { opacity: 0.6; transform: scale(0.95); }
    to   { opacity: 1;   transform: scale(1.05); }
}

.game-title {
    font-family: var(--font-display); font-size: clamp(2rem, 8vw, 6rem); font-weight: 900;
    letter-spacing: 0.08em; text-transform: uppercase;
    background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-purple) 50%, var(--neon-pink) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    filter: drop-shadow(0 0 20px #00f5ff80); animation: titlePulse 4s ease-in-out infinite;
}
@keyframes titlePulse {
    0%, 100% { filter: drop-shadow(0 0 20px #00f5ff80); }
    50%       { filter: drop-shadow(0 0 40px #b300ff80) drop-shadow(0 0 60px #ff007f40); }
}

.game-subtitle {
    font-family: var(--font-display); font-size: clamp(0.8rem, 2vw, 1.1rem);
    letter-spacing: 0.4em; color: var(--neon-cyan); text-shadow: var(--glow-cyan);
    animation: subtitleBlink 2s ease-in-out infinite; margin-top: 8px;
}
@keyframes subtitleBlink { 0%, 100% { opacity: 1; } 50% { opacity: 0.6; } }

/* High Score Display */
.high-score-display {
    display: flex; flex-direction: column; align-items: center; gap: 4px;
    padding: clamp(8px, 2vh, 12px) clamp(16px, 4vw, 32px); border: 1px solid var(--neon-purple);
    background: rgba(179,0,255,0.05);
    clip-path: polygon(12px 0%, 100% 0%, calc(100% - 12px) 100%, 0% 100%);
    box-shadow: inset 0 0 20px rgba(179,0,255,0.1), var(--glow-purple);
}
.hs-label { font-family: var(--font-display); font-size: clamp(0.5rem, 1.5vw, 0.65rem); letter-spacing: 0.3em; color: var(--neon-purple); text-shadow: var(--glow-purple); }
.hs-value { font-family: var(--font-display); font-size: clamp(1.2rem, 4vw, 1.6rem); font-weight: 700; color: var(--text-primary); text-shadow: var(--glow-purple); }

/* Menu Buttons */
.menu-buttons { display: flex; flex-direction: column; gap: 12px; width: min(320px, 80vw); }

.menu-btn {
    position: relative; display: flex; align-items: center; justify-content: center; gap: 10px;
    padding: clamp(8px, 2.5vh, 14px) clamp(16px, 4vw, 32px); font-family: var(--font-display); font-size: clamp(0.85rem, 2.5vw, 0.95rem);
    font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; min-height: 44px;
    border: none; cursor: pointer; transition: all var(--transition-fast);
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%); overflow: hidden;
}
.menu-btn::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
    transform: translateX(-100%); transition: transform 0.4s ease;
}
.menu-btn:hover::before { transform: translateX(100%); }

.menu-btn.primary {
    background: linear-gradient(135deg, var(--neon-cyan) 0%, #0099cc 100%);
    color: var(--dark-bg); box-shadow: 0 0 20px rgba(0,245,255,0.4), inset 0 1px 0 rgba(255,255,255,0.2);
}
.menu-btn.primary:hover {
    background: linear-gradient(135deg, #40ffff 0%, #00bbff 100%);
    box-shadow: 0 0 35px rgba(0,245,255,0.7), inset 0 1px 0 rgba(255,255,255,0.3);
    transform: translateY(-2px) scale(1.02);
}
.menu-btn.primary:active { transform: translateY(0) scale(0.98); }

.menu-btn.secondary {
    background: transparent; color: var(--neon-purple); border: 1px solid var(--neon-purple);
    box-shadow: 0 0 10px rgba(179,0,255,0.3), inset 0 0 10px rgba(179,0,255,0.05);
}
.menu-btn.secondary:hover {
    background: rgba(179,0,255,0.1);
    box-shadow: 0 0 25px rgba(179,0,255,0.5), inset 0 0 20px rgba(179,0,255,0.1);
    transform: translateY(-2px); color: var(--text-primary);
}
.menu-btn.secondary:active { transform: translateY(0); }

/* Tertiary button (Phase 2) */
.menu-btn.tertiary {
    background: transparent; color: var(--text-dim); border: 1px solid var(--dark-border);
    font-size: 0.85rem;
}
.menu-btn.tertiary:hover {
    background: rgba(255,255,255,0.04); color: var(--text-primary);
    border-color: rgba(255,255,255,0.2); transform: translateY(-1px);
}

.menu-btn.small { padding: 8px 20px; font-size: 0.8rem; }
.btn-icon { font-size: 1.1em; }

.menu-footer { display: flex; gap: 20px; }
.version-tag, .tech-tag { font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-muted); letter-spacing: 0.2em; }

/* ============================================================
   MODALS
   ============================================================ */
.modal-screen { align-items: center; justify-content: center; z-index: 100; }
.modal-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.85); backdrop-filter: blur(4px); }
.red-overlay { background: rgba(20,0,0,0.9); }

.modal-box {
    position: relative; z-index: 1; width: min(600px, 90vw); max-height: 90vh;
    overflow-y: auto; background: var(--dark-panel);
    border: 1px solid var(--neon-cyan);
    box-shadow: 0 0 40px rgba(0,245,255,0.2), inset 0 0 60px rgba(0,245,255,0.03);
    padding: 40px;
    clip-path: polygon(20px 0%, 100% 0%, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0% 100%, 0% 20px);
    animation: modalAppear 0.3s ease;
}
@keyframes modalAppear {
    from { opacity: 0; transform: scale(0.9) translateY(20px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header { margin-bottom: 28px; }
.modal-title { font-family: var(--font-display); font-size: 1.8rem; font-weight: 900; color: var(--neon-cyan); text-shadow: var(--glow-cyan); letter-spacing: 0.1em; }
.modal-divider { height: 1px; background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple), transparent); margin-top: 12px; }

/* Controls Grid */
.controls-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-bottom: 28px; }
.control-item {
    display: flex; flex-direction: column; gap: 6px; padding: 14px;
    border: 1px solid var(--dark-border); background: rgba(0,245,255,0.03);
    transition: border-color var(--transition-fast);
}
.control-item:hover { border-color: var(--neon-cyan); }
.control-key { font-family: var(--font-display); font-size: 1rem; font-weight: 700; color: var(--neon-cyan); text-shadow: var(--glow-cyan); }
.control-desc { font-size: 0.85rem; color: var(--text-dim); }

/* Tutorial Sections */
.tutorial-section { margin-bottom: 24px; }
.tutorial-section h3 { font-family: var(--font-display); font-size: 0.75rem; letter-spacing: 0.3em; color: var(--neon-purple); text-shadow: var(--glow-purple); margin-bottom: 12px; }
.tutorial-section p { font-size: 0.9rem; color: var(--text-dim); line-height: 1.6; }

/* Enemy/Power-up Legend */
.enemy-legend, .powerup-legend { display: flex; flex-direction: column; gap: 8px; }
.legend-item { display: flex; align-items: center; gap: 10px; font-size: 0.85rem; color: var(--text-dim); }
.legend-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.legend-dot.basic   { background: var(--neon-cyan);   box-shadow: var(--glow-cyan); }
.legend-dot.fast    { background: var(--neon-green);  box-shadow: var(--glow-green); }
.legend-dot.tank    { background: var(--neon-orange); box-shadow: var(--glow-orange); }
.legend-dot.shooter { background: var(--neon-pink);   box-shadow: var(--glow-pink); }
.legend-dot.health  { background: #ff4466; box-shadow: 0 0 8px #ff4466; }
.legend-dot.rapid   { background: var(--neon-yellow); box-shadow: var(--glow-yellow); }
.legend-dot.damage  { background: var(--neon-purple); box-shadow: var(--glow-purple); }
/* Phase 2 legend dots */
.legend-dot.boss-dot  { background: #ff3300; box-shadow: 0 0 10px #ff3300, 0 0 20px #ff330040; border-radius: 3px; }
.legend-dot.shield-dot { background: var(--neon-cyan); box-shadow: var(--glow-cyan); border: 2px solid rgba(0,245,255,0.3); }

.modal-footer { margin-top: 28px; display: flex; justify-content: flex-start; }

/* ── Settings Modal (Phase 2) ── */
.settings-box { border-color: var(--neon-purple); box-shadow: 0 0 40px rgba(179,0,255,0.2), inset 0 0 60px rgba(179,0,255,0.03); }

.setting-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 0; border-bottom: 1px solid var(--dark-border);
}
.setting-row:last-child { border-bottom: none; }
.setting-label { font-family: var(--font-display); font-size: 0.85rem; letter-spacing: 0.15em; color: var(--text-dim); }

.toggle-btn {
    font-family: var(--font-display); font-size: 0.8rem; font-weight: 700;
    letter-spacing: 0.2em; padding: 8px 20px; border: none; cursor: pointer;
    clip-path: polygon(6px 0%, 100% 0%, calc(100% - 6px) 100%, 0% 100%);
    transition: all var(--transition-fast);
}
.toggle-btn.on  { background: var(--neon-cyan); color: var(--dark-bg); box-shadow: 0 0 15px rgba(0,245,255,0.4); }
.toggle-btn.off { background: var(--dark-border); color: var(--text-muted); }
.toggle-btn:hover { transform: scale(1.05); }

/* ============================================================
   GAME SCREEN
   ============================================================ */
#game-screen { align-items: center; justify-content: center; background: var(--dark-bg); }
#game-canvas { display: block; cursor: crosshair; image-rendering: pixelated; }

/* ============================================================
   HUD
   ============================================================ */
.hud { position: absolute; inset: 0; pointer-events: none; z-index: 10; }

.hud-panel {
    position: absolute; top: 12px; padding: 8px 16px;
    background: rgba(5,5,16,0.7); border: 1px solid rgba(0,245,255,0.15);
    backdrop-filter: blur(4px); display: flex; flex-direction: column; align-items: center; gap: 2px; min-width: 90px;
}
.hud-left   { left: 12px; }
.hud-center { left: 50%; transform: translateX(-50%); }
.hud-right  { right: 12px; }

.hud-label { font-family: var(--font-display); font-size: 0.55rem; letter-spacing: 0.3em; color: var(--neon-cyan); text-shadow: var(--glow-cyan); }
.hud-value { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; color: var(--text-primary); min-width: 80px; text-align: center; }
.wave-val  { color: var(--neon-purple); text-shadow: var(--glow-purple); }
.hs-sub    { font-size: 0.5rem; color: var(--text-muted); margin-top: 2px; }

/* Level / Weapon inline in HUD */
.hud-level-val { color: var(--neon-cyan); text-shadow: var(--glow-cyan); font-weight: 700; }
.hud-wpn-val   { color: var(--neon-yellow); text-shadow: var(--glow-yellow); font-weight: 700; }

/* Bottom Center: HP + XP stacked */
.hud-bottom-center {
    position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
}

/* HP Bar */
.hud-hp { display: flex; flex-direction: column; align-items: center; gap: 5px; min-width: 240px; }
.hp-bar-container {
    width: 240px; height: 16px; background: rgba(255,0,0,0.1);
    border: 1px solid rgba(255,0,0,0.3); position: relative; overflow: hidden;
}
.hp-bar {
    height: 100%; width: 100%;
    background: linear-gradient(90deg, #ff1a1a, #ff4466, #ff6680);
    box-shadow: 0 0 10px rgba(255,68,102,0.5); transition: width 0.2s ease; position: relative;
}
.hp-bar::after {
    content: ''; position: absolute; inset: 0;
    background: repeating-linear-gradient(90deg, transparent, transparent 16px, rgba(0,0,0,0.2) 16px, rgba(0,0,0,0.2) 17px);
}
.hp-text {
    position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
    font-family: var(--font-mono); font-size: 0.65rem; color: rgba(255,255,255,0.9); text-shadow: 0 0 4px #000;
}

/* XP Bar (Phase 2) */
.hud-xp { display: flex; flex-direction: column; align-items: center; gap: 4px; min-width: 240px; }
.xp-bar-container {
    width: 240px; height: 10px; background: rgba(0,245,255,0.05);
    border: 1px solid rgba(0,245,255,0.2); position: relative; overflow: hidden;
}
.xp-bar {
    height: 100%; width: 0%;
    background: linear-gradient(90deg, #006688, var(--neon-cyan));
    box-shadow: 0 0 8px rgba(0,245,255,0.5); transition: width 0.3s ease;
}
.xp-text {
    position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
    font-family: var(--font-mono); font-size: 0.55rem; color: rgba(0,245,255,0.8); text-shadow: 0 0 4px #000;
}

/* Power-up Indicators */
.hud-powerups {
    position: absolute; bottom: 100px; left: 50%; transform: translateX(-50%);
    display: flex; gap: 8px; pointer-events: none;
}
.powerup-indicator {
    display: flex; align-items: center; gap: 6px; padding: 5px 12px;
    border: 1px solid var(--neon-yellow); background: rgba(255,255,0,0.08);
    box-shadow: 0 0 10px rgba(255,255,0,0.2); animation: puPulse 1s ease-in-out infinite;
}
@keyframes puPulse {
    0%, 100% { box-shadow: 0 0 10px rgba(255,255,0,0.2); }
    50%       { box-shadow: 0 0 20px rgba(255,255,0,0.5); }
}
/* Shield indicator variant */
.shield-indicator {
    border-color: var(--neon-cyan); background: rgba(0,245,255,0.08);
    box-shadow: 0 0 10px rgba(0,245,255,0.2); animation: shieldPulse 1s ease-in-out infinite;
}
@keyframes shieldPulse {
    0%, 100% { box-shadow: 0 0 10px rgba(0,245,255,0.3); }
    50%       { box-shadow: 0 0 25px rgba(0,245,255,0.7); }
}
.pu-icon  { font-size: 1rem; }
.pu-label { font-family: var(--font-display); font-size: 0.6rem; color: var(--neon-yellow); text-shadow: var(--glow-yellow); }
.pu-timer { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-primary); }
.shield-indicator .pu-label { color: var(--neon-cyan); text-shadow: var(--glow-cyan); }

/* Wave Notification */
.wave-notification {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    text-align: center; z-index: 20; pointer-events: none;
}
.wave-notification.hidden { display: none; }
.wave-notif-text {
    font-family: var(--font-display); font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 900;
    color: var(--neon-cyan); text-shadow: var(--glow-cyan), 0 0 60px rgba(0,245,255,0.3);
    letter-spacing: 0.1em; animation: waveAppear 0.5s ease;
}
.wave-notif-sub {
    font-family: var(--font-display); font-size: 0.9rem; letter-spacing: 0.4em;
    color: var(--neon-purple); text-shadow: var(--glow-purple); margin-top: 8px;
    animation: waveAppear 0.5s ease 0.1s both;
}
@keyframes waveAppear {
    from { opacity: 0; transform: scale(1.3); }
    to   { opacity: 1; transform: scale(1); }
}

/* ── Boss Warning (Phase 2) ── */
.boss-warning {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    text-align: center; z-index: 22; pointer-events: none;
    animation: bossWarnAppear 0.4s ease;
}
.boss-warning.hidden { display: none; }
.boss-warn-icon {
    font-size: 3rem; color: var(--neon-yellow);
    text-shadow: var(--glow-yellow);
    animation: bossWarnPulse 0.5s ease-in-out infinite alternate;
}
.boss-warn-text {
    font-family: var(--font-display); font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 900;
    color: #ff3300; text-shadow: 0 0 20px #ff330080, 0 0 40px #ff330040;
    letter-spacing: 0.15em; animation: bossWarnPulse 0.5s ease-in-out infinite alternate;
}
.boss-warn-sub {
    font-family: var(--font-display); font-size: 0.9rem; letter-spacing: 0.5em;
    color: var(--neon-yellow); text-shadow: var(--glow-yellow);
    animation: bossWarnPulse 0.5s ease-in-out infinite alternate 0.25s;
}
@keyframes bossWarnAppear { from { opacity: 0; transform: translate(-50%,-50%) scale(1.4); } to { opacity: 1; transform: translate(-50%,-50%) scale(1); } }
@keyframes bossWarnPulse  { from { opacity: 0.6; } to { opacity: 1; } }

/* ── Level Up Overlay (Phase 2) ── */
.level-up-overlay {
    position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
    z-index: 40; pointer-events: all;
}
.level-up-overlay.hidden { display: none; }
.level-up-bg { position: absolute; inset: 0; background: rgba(0,0,0,0.75); backdrop-filter: blur(6px); }
.level-up-box {
    position: relative; z-index: 1; text-align: center;
    display: flex; flex-direction: column; align-items: center; gap: 20px;
    padding: 40px 20px;
}
.level-up-title {
    font-family: var(--font-display); font-size: clamp(2rem, 5vw, 3rem); font-weight: 900;
    color: var(--neon-cyan); text-shadow: var(--glow-cyan), 0 0 60px rgba(0,245,255,0.3);
    animation: levelUpPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes levelUpPop {
    from { opacity: 0; transform: scale(0.5); }
    to   { opacity: 1; transform: scale(1); }
}
.level-up-sub {
    font-family: var(--font-display); font-size: 0.8rem; letter-spacing: 0.4em;
    color: var(--neon-purple); text-shadow: var(--glow-purple);
}
.upgrade-cards { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.upgrade-card {
    background: var(--dark-panel); border: 2px solid var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0,245,255,0.15), inset 0 0 30px rgba(0,245,255,0.03);
    padding: 28px 22px; width: 180px; cursor: pointer;
    transition: all 0.2s ease; text-align: center;
    clip-path: polygon(12px 0%, 100% 0%, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0% 100%, 0% 12px);
    animation: cardAppear 0.4s ease both;
}
.upgrade-card:nth-child(1) { animation-delay: 0.05s; }
.upgrade-card:nth-child(2) { animation-delay: 0.12s; }
.upgrade-card:nth-child(3) { animation-delay: 0.19s; }
@keyframes cardAppear {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}
.upgrade-card:hover {
    background: rgba(0,245,255,0.1); border-color: #40ffff;
    box-shadow: 0 0 40px rgba(0,245,255,0.4), inset 0 0 30px rgba(0,245,255,0.06);
    transform: translateY(-6px) scale(1.04);
}
.upgrade-card:active { transform: translateY(-2px) scale(1.01); }
.upgrade-icon  { font-size: 2rem; margin-bottom: 10px; }
.upgrade-label { font-family: var(--font-display); font-size: 0.8rem; font-weight: 700; color: var(--neon-cyan); letter-spacing: 0.1em; margin-bottom: 8px; }
.upgrade-desc  { font-size: 0.75rem; color: var(--text-dim); line-height: 1.4; }

/* ── Pause Overlay (updated) ── */
.pause-overlay {
    position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
    background: rgba(0,0,0,0.7); backdrop-filter: blur(6px); z-index: 30; pointer-events: all;
}
.pause-overlay.hidden { display: none; }
.pause-box {
    text-align: center; padding: 40px 50px; border: 1px solid var(--neon-cyan);
    background: var(--dark-panel); box-shadow: var(--glow-cyan);
}
.pause-title {
    font-family: var(--font-display); font-size: 2.5rem; font-weight: 900;
    color: var(--neon-cyan); text-shadow: var(--glow-cyan); letter-spacing: 0.2em; margin-bottom: 24px;
}
.pause-buttons { display: flex; flex-direction: column; gap: 12px; width: 220px; margin: 0 auto; }

/* FPS Counter (Phase 2) */
.fps-counter {
    position: absolute; top: 12px; left: 50%; transform: translateX(-50%) translateX(300px);
    font-family: var(--font-mono); font-size: 0.7rem; color: rgba(255,255,255,0.4);
    background: rgba(0,0,0,0.5); padding: 3px 8px; pointer-events: none;
    z-index: 15;
}

/* ============================================================
   GAME OVER SCREEN
   ============================================================ */
.game-over-box {
    border-color: var(--neon-pink);
    box-shadow: 0 0 40px rgba(255,0,127,0.3), inset 0 0 60px rgba(255,0,127,0.03);
    text-align: center;
}
.system-failure {
    font-family: var(--font-display); font-size: 0.75rem; letter-spacing: 0.4em;
    color: var(--neon-pink); text-shadow: var(--glow-pink); animation: glitch 2s infinite;
}
@keyframes glitch {
    0%, 90%, 100% { transform: translate(0); }
    92% { transform: translate(-2px, 1px); }
    94% { transform: translate(2px, -1px); }
    96% { transform: translate(0); }
}
.game-over-title {
    font-family: var(--font-display); font-size: clamp(2rem, 5vw, 3rem); font-weight: 900;
    letter-spacing: 0.1em;
    background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    filter: drop-shadow(0 0 20px rgba(255,0,127,0.6)); margin: 8px 0;
}
.game-over-stats { margin: 24px 0; display: flex; flex-direction: column; gap: 8px; }
.stat-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: 7px 0; border-bottom: 1px solid var(--dark-border);
}
.stat-row.stat-highlight {
    padding: 10px 0; border-bottom: 1px solid var(--neon-pink);
}
.stat-row.stat-highlight .stat-value {
    font-size: 1.6rem; color: var(--neon-cyan); text-shadow: var(--glow-cyan);
}
.stat-label { font-family: var(--font-display); font-size: 0.65rem; letter-spacing: 0.15em; color: var(--text-dim); }
.stat-value { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }

.new-high-score {
    font-family: var(--font-display); font-size: 1rem; letter-spacing: 0.2em;
    color: var(--neon-yellow); text-shadow: var(--glow-yellow); padding: 12px;
    border: 1px solid var(--neon-yellow); background: rgba(255,255,0,0.05);
    animation: hsBlink 0.5s ease-in-out infinite alternate; margin-bottom: 16px;
}
.new-high-score.hidden { display: none; }
@keyframes hsBlink {
    from { opacity: 0.7; box-shadow: 0 0 10px rgba(255,255,0,0.2); }
    to   { opacity: 1;   box-shadow: 0 0 25px rgba(255,255,0,0.5); }
}
.game-over-buttons { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }

/* ============================================================
   MOBILE & RESPONSIVE
   ============================================================ */
#game-canvas, #menu-bg-canvas { touch-action: none; -webkit-touch-callout: none; }

/* Safe Area Insets */
.game-container {
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

/* Virtual Joystick */
.vj-base { position: absolute; width: 100px; height: 100px; border-radius: 50%; pointer-events: none; z-index: 50; transition: opacity 0.2s; opacity: 0.6; }
.vj-base.active { opacity: 1; }
.vj-left { left: calc(24px + env(safe-area-inset-left)); bottom: calc(24px + env(safe-area-inset-bottom)); border: 2px solid rgba(0, 245, 255, 0.4); background: radial-gradient(circle, rgba(0,245,255,0.1) 0%, transparent 70%); box-shadow: 0 0 15px rgba(0, 245, 255, 0.2), inset 0 0 10px rgba(0, 245, 255, 0.2); }
.vj-right { right: calc(24px + env(safe-area-inset-right)); bottom: calc(24px + env(safe-area-inset-bottom)); border: 2px solid rgba(179, 0, 255, 0.4); background: radial-gradient(circle, rgba(179,0,255,0.1) 0%, transparent 70%); box-shadow: 0 0 15px rgba(179, 0, 255, 0.2), inset 0 0 10px rgba(179, 0, 255, 0.2); }

.vj-knob { position: absolute; top: 50%; left: 50%; width: 40px; height: 40px; border-radius: 50%; transform: translate(-50%, -50%); pointer-events: none; }
.vj-left .vj-knob { background: var(--neon-cyan); box-shadow: 0 0 10px var(--neon-cyan), 0 0 20px var(--neon-cyan); }
.vj-right .vj-knob { background: var(--neon-purple); box-shadow: 0 0 10px var(--neon-purple), 0 0 20px var(--neon-purple); }

/* Rotate Overlay */
.rotate-overlay {
    display: none; position: fixed; inset: 0; z-index: 9999;
    background: var(--dark-bg); align-items: center; justify-content: center; text-align: center; padding: 40px;
}
.rotate-content { display: flex; flex-direction: column; align-items: center; gap: 16px; }
.rotate-icon { font-size: 3rem; color: var(--neon-yellow); text-shadow: var(--glow-yellow); }
.rotate-overlay h2 { font-family: var(--font-display); font-size: 1.5rem; color: var(--neon-cyan); text-shadow: var(--glow-cyan); letter-spacing: 0.1em; }
.rotate-overlay p { font-family: var(--font-display); font-size: 0.9rem; letter-spacing: 0.15em; color: var(--text-primary); }

@media (orientation: portrait) and (max-width: 1024px) {
    .rotate-overlay { display: flex; }
}

/* Mobile Breakpoints */
@media (max-width: 768px) {
    .game-title { font-size: clamp(2rem, 8vw, 3.5rem); line-height: 1.1; }
    .game-subtitle { font-size: clamp(0.7rem, 2.5vw, 1rem); margin-top: 4px; }
    .menu-content { padding: 15px; }
    .hud-panel { min-width: 60px; padding: 6px 10px; }
    .hud-value { font-size: 1.1rem; min-width: 50px; }
    .hud-label { font-size: 0.45rem; }
    
    .hud-bottom-center { gap: 4px; bottom: 8px; }
    .hp-bar-container, .xp-bar-container { width: 160px; }
    
    .modal-box { padding: 24px 20px; }
    .controls-grid { grid-template-columns: 1fr; }
    
    .hud-powerups { bottom: 60px; transform: scale(0.8) translateX(-60%); }
    
    .game-over-title { font-size: 2rem; }
    .stat-row { padding: 5px 0; }
    .stat-value { font-size: 0.9rem; }
    .stat-row.stat-highlight .stat-value { font-size: 1.2rem; }
    .upgrade-cards { gap: 8px; }
    .upgrade-card { width: 140px; padding: 16px 12px; }
}

@media (orientation: landscape) and (max-height: 500px) {
    .menu-content { gap: 10px; padding: 10px; }
    .logo-glow { inset: -20px; }
    .game-title { font-size: clamp(1.8rem, 10vh, 2.8rem); line-height: 1; margin: 0; }
    .game-subtitle { font-size: clamp(0.6rem, 3.5vh, 0.8rem); margin-top: 0; }
    
    .high-score-display { padding: 6px 20px; margin: 0; }
    .hs-label { font-size: 0.5rem; }
    .hs-value { font-size: 1.2rem; }
    
    .menu-buttons { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 10px; width: 100%; max-width: 500px; }
    .menu-btn { flex: 1 1 140px; padding: 8px 12px; font-size: 0.8rem; }
}

/* ── Scrollbar ── */
.modal-box::-webkit-scrollbar { width: 4px; }
.modal-box::-webkit-scrollbar-track { background: var(--dark-surface); }
.modal-box::-webkit-scrollbar-thumb { background: var(--neon-cyan); border-radius: 2px; }

/* ── Utility Animations ── */
@keyframes float    { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes spin     { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }