:root {
    --bg-color: #030407;
    --card-bg: rgba(15, 17, 28, 0.7);
    --border-color: rgba(255, 0, 234, 0.2);
    --cyan-accent: #00f3ff;
    --pink-accent: #ff00ea;
    --yellow-accent: #ffd700;
    --cyan-glow: rgba(0, 243, 255, 0.4);
    --pink-glow: rgba(255, 0, 234, 0.4);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.6);
    --hud-h-desktop: 70px;
    --hud-h-mobile: 60px;
    --ad-h-desktop: 90px;
    --ad-h-mobile: 50px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: #000;
    color: var(--text-primary);
    overflow: hidden;
}

/* ==================== GAME ROOT ==================== */
.game-root {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    background: radial-gradient(circle at center, #0c0d1a 0%, #030407 100%);
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
}

/* ==================== HUD BAR (3-Column Grid) ==================== */
.header {
    height: var(--hud-h-desktop);
    width: 100%;
    background: rgba(3, 4, 7, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    padding: 0 24px;
    z-index: 1000;
    flex-shrink: 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-left { display: flex; align-items: center; min-width: 120px; }
.home-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 0, 234, 0.3);
    color: var(--text-secondary);
    padding: 10px 18px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px rgba(255, 0, 234, 0.1);
}
.home-btn:hover { 
    color: #fff; 
    border-color: var(--pink-accent); 
    box-shadow: 0 0 15px var(--pink-glow);
    transform: translateY(-1px);
}

.header-center { display: flex; justify-content: center; align-items: center; }
.score-pills { display: flex; gap: 12px; }

.score-pill {
    background: rgba(0, 243, 255, 0.04);
    border: 1px solid rgba(0, 243, 255, 0.15);
    padding: 6px 18px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 90px;
    transition: all 0.3s ease;
}

.pill-label {
    font-size: 9px;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.pill-value {
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--cyan-accent);
    text-shadow: 0 0 10px var(--cyan-glow);
}

#multiplier-container {
    background: rgba(255, 0, 234, 0.05);
    border: 1px solid rgba(255, 0, 234, 0.25);
    animation: pulseGlow 1.5s infinite alternate;
}
#multiplier-container .pill-value {
    color: var(--pink-accent);
    text-shadow: 0 0 10px var(--pink-glow);
}

.header-right { display: flex; gap: 10px; justify-content: flex-end; min-width: 120px; }

.icon-btn {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.15rem;
    transition: all 0.3s ease;
}
.icon-btn:hover { 
    border-color: var(--cyan-accent); 
    box-shadow: 0 0 15px var(--cyan-glow);
    transform: scale(1.05); 
}
.icon-btn.hidden { display: none !important; }

/* ==================== ACTIVE POWERUPS PANEL ==================== */
.powerups-hud-container {
    position: absolute;
    top: 85px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 10;
    pointer-events: none;
}

.powerup-bar {
    background: rgba(10, 12, 22, 0.85);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 8px 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 150px;
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    animation: slideIn 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

.powerup-bar-icon { font-size: 1.1rem; }
.powerup-bar-info { flex: 1; }
.powerup-bar-name { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; }
.powerup-bar-track { height: 4px; background: rgba(255, 255, 255, 0.1); border-radius: 2px; margin-top: 4px; overflow: hidden; }
.powerup-bar-fill { height: 100%; width: 100%; border-radius: 2px; transition: width 0.1s linear; }

.powerup-bar.chrono { border-color: var(--cyan-accent); }
.powerup-bar.chrono .powerup-bar-name { color: var(--cyan-accent); }
.powerup-bar.chrono .powerup-bar-fill { background: var(--cyan-accent); box-shadow: 0 0 8px var(--cyan-glow); }

.powerup-bar.shield { border-color: var(--pink-accent); }
.powerup-bar.shield .powerup-bar-name { color: var(--pink-accent); }
.powerup-bar.shield .powerup-bar-fill { background: var(--pink-accent); box-shadow: 0 0 8px var(--pink-glow); }

.powerup-bar.magnet { border-color: var(--yellow-accent); }
.powerup-bar.magnet .powerup-bar-name { color: var(--yellow-accent); }
.powerup-bar.magnet .powerup-bar-fill { background: var(--yellow-accent); box-shadow: 0 0 8px rgba(255, 215, 0, 0.4); }

/* ==================== GAME AREA ==================== */
.game-wrapper {
    flex: 1;
    position: relative;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    overflow: hidden;
}

#gameCanvas {
    display: block;
    background-color: #030407;
    max-width: 100%;
    max-height: 100%;
    border-radius: 16px;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.8), 0 0 30px rgba(255, 0, 234, 0.05);
    border: 1px solid rgba(255, 0, 234, 0.1);
}

/* ==================== OVERLAYS & MODALS ==================== */
.overlay {
    position: absolute;
    inset: 0;
    background: rgba(3, 4, 7, 0.95);
    backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
    animation: fadeIn 0.4s ease-out;
}
.overlay.hidden { display: none !important; }

.overlay-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 28px;
    padding: 40px;
    text-align: center;
    max-width: 480px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7), 0 0 40px rgba(255, 0, 234, 0.1);
    backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
    align-items: stretch;
}

.overlay-content h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff, var(--pink-accent) 50%, var(--cyan-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 1px;
    text-shadow: 0 0 20px rgba(255, 0, 234, 0.2);
}

.overlay-content p.subtitle { 
    color: var(--text-secondary); 
    font-size: 0.95rem; 
    margin-bottom: 28px; 
}

/* ==================== MODE SELECTOR ==================== */
.mode-selector {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 30px;
}

.mode-card-btn {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mode-icon {
    font-size: 1.8rem;
    background: rgba(255, 255, 255, 0.04);
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.mode-info {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.mode-title {
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 2px;
}

.mode-desc {
    color: var(--text-secondary);
    font-size: 0.8rem;
    line-height: 1.4;
}

/* Hover & Selected states */
.mode-card-btn:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.mode-card-btn.active#choose-zen {
    border-color: var(--cyan-accent);
    background: rgba(0, 243, 255, 0.06);
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.2);
}
.mode-card-btn.active#choose-zen .mode-icon {
    background: rgba(0, 243, 255, 0.15);
    color: var(--cyan-accent);
    text-shadow: 0 0 10px var(--cyan-glow);
}
.mode-card-btn.active#choose-zen .mode-title { color: var(--cyan-accent); }

.mode-card-btn.active#choose-arcade {
    border-color: var(--pink-accent);
    background: rgba(255, 0, 234, 0.06);
    box-shadow: 0 0 20px rgba(255, 0, 234, 0.2);
}
.mode-card-btn.active#choose-arcade .mode-icon {
    background: rgba(255, 0, 234, 0.15);
    color: var(--pink-accent);
    text-shadow: 0 0 10px var(--pink-glow);
}
.mode-card-btn.active#choose-arcade .mode-title { color: var(--pink-accent); }

/* ==================== BUTTONS ==================== */
.action-buttons { display: flex; flex-direction: column; gap: 14px; }

.btn {
    padding: 15px 30px;
    font-size: 1.05rem;
    font-weight: 800;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    border: none;
}

.primary {
    background: linear-gradient(90deg, var(--pink-accent), var(--cyan-accent));
    color: #fff;
    box-shadow: 0 0 25px rgba(255, 0, 234, 0.45);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}
.primary:hover { 
    transform: translateY(-2px); 
    box-shadow: 0 0 35px rgba(0, 243, 255, 0.6); 
}
.primary:active { transform: translateY(0); }

.secondary {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
}
.secondary:hover { 
    border-color: var(--pink-accent); 
    background: rgba(255, 0, 234, 0.05);
    box-shadow: 0 0 15px var(--pink-glow);
}

.share-container { display: flex; gap: 12px; margin-bottom: 20px; }
.share-container.hidden { display: none !important; }
.share-btn { 
    flex: 1; 
    height: 52px; 
    border-radius: 12px; 
    color: white; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    gap: 8px; 
    font-weight: 700; 
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-decoration: none; 
    border: none; 
    cursor: pointer; 
    transition: all 0.3s ease;
}
.share-btn:hover { transform: translateY(-2px); }
.twitter { background: #1b1e22; border: 1px solid rgba(255,255,255,0.15); }
.twitter:hover { background: #2b3036; border-color: rgba(255,255,255,0.3); }
.whatsapp { background: #128c7e; }
.whatsapp:hover { background: #14a090; box-shadow: 0 0 15px rgba(18, 140, 126, 0.4); }

/* ==================== 4. MOBILE CONTROLS ==================== */
.mobile-controls {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 15;
    pointer-events: none;
}

.control-row { display: flex; gap: 12px; }
.control-btn {
    width: 58px;
    height: 58px;
    background: rgba(255, 0, 234, 0.05);
    border: 1px solid rgba(255, 0, 234, 0.25);
    border-radius: 16px;
    color: #fff;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
    cursor: pointer;
    pointer-events: auto;
    transition: all 0.1s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}
.control-btn:active { 
    background: var(--pink-accent); 
    border-color: var(--pink-accent);
    color: #fff; 
    transform: scale(0.92); 
    box-shadow: 0 0 20px var(--pink-glow);
}

/* Custom styles to color code different directions slightly */
#upBtn { 
    border-color: rgba(0, 243, 255, 0.25); 
    background: rgba(0, 243, 255, 0.03); 
}
#upBtn:active {
    background: var(--cyan-accent);
    border-color: var(--cyan-accent);
    box-shadow: 0 0 20px var(--cyan-glow);
}

/* ==================== 5. AD CONTAINER ==================== */
.ad-container {
    width: 100%;
    max-width: 728px;
    height: var(--ad-h-desktop);
    margin: 0 auto;
    overflow: hidden;
    flex-shrink: 0;
    background: transparent;
    display: none;
    align-items: center;
    justify-content: center;
    border-top: 1px solid var(--border-color);
}

.ad-container.ad-loaded { display: flex; }

/* ==================== KEYFRAMES ==================== */
@keyframes pulseGlow {
    from { box-shadow: 0 0 10px rgba(255, 0, 234, 0.2); }
    to { box-shadow: 0 0 25px rgba(255, 0, 234, 0.5); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateX(50px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 800px) {
    .mobile-controls { display: flex; }
    .powerups-hud-container { top: 75px; right: 16px; }
}

@media (max-width: 600px) {
    .header { height: var(--hud-h-mobile); padding: 0 16px; }
    .nav-left, .header-right { min-width: 80px; }
    .home-btn { padding: 8px 12px; font-size: 0; }
    .home-btn::after { content: '← Hub'; font-size: 0.8rem; }
    
    .score-pill { min-width: 76px; padding: 4px 12px; }
    .pill-label { font-size: 7px; }
    .pill-value { font-size: 1rem; }
    
    .overlay-content { padding: 28px 20px; }
    .overlay-content h2 { font-size: 1.85rem; }
    
    .mode-card-btn { padding: 12px 14px; gap: 10px; }
    .mode-icon { width: 38px; height: 38px; font-size: 1.3rem; }
    .mode-title { font-size: 0.95rem; }
    .mode-desc { font-size: 0.75rem; }
    
    .btn { padding: 12px 24px; font-size: 0.95rem; }
    .ad-container { height: var(--ad-h-mobile); max-width: 320px; }
}

/* How to Play Overlay */
.htp-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(3, 4, 7, 0.97);
    z-index: 9998;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(12px);
    overflow-y: auto;
}
.htp-overlay.active { display: flex; }
.htp-card { max-width: 460px; width: 100%; margin: auto; padding: 24px; background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 24px; box-shadow: 0 10px 40px rgba(0,0,0,0.5); }
.htp-title { font-size: 1.6rem; color: var(--pink-accent); text-align: center; margin-bottom: 20px; font-weight: 900; text-shadow: 0 0 15px var(--pink-glow); letter-spacing: 0.5px; }
.htp-row { display: flex; gap: 14px; margin-bottom: 16px; font-size: 0.9rem; color: rgba(255,255,255,0.75); line-height: 1.5; }
.htp-row-icon { font-size: 1.3rem; display: flex; align-items: center; justify-content: center; }
.htp-back { 
    display: block; 
    margin: 24px auto 0; 
    padding: 12px 36px; 
    border-radius: 12px; 
    border: 1px solid rgba(0, 243, 255, 0.3); 
    background: rgba(0, 243, 255, 0.05); 
    color: var(--cyan-accent); 
    font-weight: 700;
    cursor: pointer; 
    transition: all 0.3s ease;
}
.htp-back:hover {
    border-color: var(--cyan-accent);
    background: rgba(0, 243, 255, 0.1);
    box-shadow: 0 0 15px var(--cyan-glow);
}