* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: fixed;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #fff;
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    /* Use safe area for notched devices */
    height: 100dvh; /* Dynamic viewport height */
    touch-action: none;
    -webkit-user-select: none;
    user-select: none;
    position: fixed;
    left: 0;
    top: 0;
}

/* Screen Management */
.screen {
    display: none;
    width: 100%;
    height: 100vh; /* Fallback for desktop */
    position: fixed; /* Fix positioning for mobile */
    top: 0;
    left: 0;
}

.screen.active {
    display: flex;
}

/* Title Screen */
#titleScreen {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: url('images/Title screen.png') center center / cover no-repeat;
    position: relative;
}

#titleScreen::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.title-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.press-start {
    font-size: 2.5em;
    font-weight: bold;
    color: #fff;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.8),
                 0 0 40px rgba(52, 232, 158, 0.6),
                 0 4px 10px rgba(0, 0, 0, 0.8);
    animation: pressStartBlink 1.5s ease-in-out infinite;
    cursor: pointer;
    padding: 20px 40px;
    border: 3px solid rgba(255, 255, 255, 0.5);
    border-radius: 15px;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
    transition: all 0.3s ease;
}

.press-start:hover {
    background: rgba(52, 232, 158, 0.2);
    border-color: #34e89e;
    transform: scale(1.05);
}

@keyframes pressStartBlink {
    0%, 100% { 
        opacity: 1;
        text-shadow: 0 0 20px rgba(255, 255, 255, 0.8),
                     0 0 40px rgba(52, 232, 158, 0.6),
                     0 4px 10px rgba(0, 0, 0, 0.8);
    }
    50% { 
        opacity: 0.4;
        text-shadow: 0 0 10px rgba(255, 255, 255, 0.4),
                     0 0 20px rgba(52, 232, 158, 0.3),
                     0 4px 10px rgba(0, 0, 0, 0.8);
    }
}

/* Character Selection Screen */
#characterSelect {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: linear-gradient(135deg, #0f3443 0%, #34e89e 100%);
}

#characterSelect h1 {
    font-size: 3.5em;
    margin-bottom: 10px;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
    animation: fadeInDown 0.8s ease;
}

.game-subtitle {
    font-size: 1.5em;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
    animation: fadeInDown 0.8s ease 0.2s both;
}

.character-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1400px;
    width: 100%;
}

.character-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    animation: fadeIn 0.8s ease;
}

.character-card:hover {
    transform: translateY(-10px) scale(1.05);
    border-color: #34e89e;
    box-shadow: 0 10px 40px rgba(52, 232, 158, 0.4);
}

.character-icon {
    text-align: center;
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.character-sprite {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid rgba(52, 232, 158, 0.4);
    background: rgba(0, 0, 0, 0.3);
    padding: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 0 20px rgba(52, 232, 158, 0.2);
}

.character-card:hover .character-sprite {
    border-color: #34e89e;
    box-shadow: 0 0 30px rgba(52, 232, 158, 0.6);
    transform: scale(1.1);
}

.character-card h2 {
    text-align: center;
    margin-bottom: 10px;
    color: #34e89e;
}

.character-ability {
    text-align: center;
    font-weight: bold;
    color: #ffd700;
    margin-bottom: 5px;
}

.character-desc {
    text-align: center;
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 15px;
    min-height: 40px;
}

.character-stats {
    display: flex;
    flex-direction: column;
    gap: 5px;
    font-size: 0.85em;
    color: rgba(255, 255, 255, 0.9);
}

/* Game Screen */
#gameScreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height for mobile */
    overflow: hidden;
}

#gameCanvas {
    display: block;
    background: #1a1a2e;
    touch-action: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw !important;
    height: 100vh !important;
    height: 100dvh !important;
}

/* HUD */
#hud {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    pointer-events: none;
    z-index: 10;
}

.hud-top {
    display: flex;
    justify-content: space-around;
    padding: 20px;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent);
    flex-wrap: wrap;
    gap: 15px;
}

.hud-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(0, 0, 0, 0.5);
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: bold;
    font-size: 1em;
}

.hud-label {
    font-size: 0.9em;
}

.health-bar, .xp-bar, .ultimate-bar {
    width: 150px;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    overflow: hidden;
}

.health-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff4444, #ff6666);
    transition: width 0.3s ease;
    width: 100%;
}

.xp-fill {
    height: 100%;
    background: linear-gradient(90deg, #4444ff, #6666ff);
    transition: width 0.3s ease;
    width: 0%;
}

.ultimate-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff9800, #ffc107, #ff9800);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
    transition: width 0.3s ease;
    width: 0%;
}

@keyframes shimmer {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* Ultimate Button */
/* Pause Button */
.pause-button {
    position: fixed;
    top: 50%;
    right: 10px;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.8);
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
    pointer-events: all;
}

.pause-button:hover {
    background: rgba(0, 0, 0, 0.8);
    border-color: rgba(255, 255, 255, 0.6);
    transform: scale(1.1);
}

.pause-button:active {
    transform: scale(0.95);
}

.pause-icon {
    font-size: 2em;
}

.ultimate-button {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) scale(0.8);
    background: linear-gradient(135deg, #333, #555);
    border: 3px solid #666;
    border-radius: 20px;
    padding: 20px 40px;
    cursor: not-allowed;
    opacity: 0.5;
    transition: all 0.3s ease;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    font-family: 'Segoe UI', sans-serif;
    z-index: 20;
}

.ultimate-button.ready {
    background: linear-gradient(135deg, #ff6b00, #ff9800);
    border-color: #ffc107;
    cursor: pointer;
    opacity: 1;
    pointer-events: all;
    transform: translateX(-50%) scale(1);
    box-shadow: 0 0 30px rgba(255, 152, 0, 0.8);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { transform: translateX(-50%) scale(1); box-shadow: 0 0 30px rgba(255, 152, 0, 0.8); }
    50% { transform: translateX(-50%) scale(1.05); box-shadow: 0 0 50px rgba(255, 152, 0, 1); }
}

.ultimate-icon {
    font-size: 2.5em;
}

.ultimate-label {
    font-size: 1.2em;
    font-weight: bold;
    color: white;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
}

.ultimate-hint {
    font-size: 0.8em;
    color: rgba(255, 255, 255, 0.7);
}

/* Hide desktop ultimate button on mobile/touch devices */
@media (hover: none) and (pointer: coarse) {
    .ultimate-button {
        display: none !important;
    }
}

/* Boss Warning */
.boss-warning {
    display: none;
    position: absolute;
    top: 15%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 200;
}

.boss-warning.active {
    display: block;
}

.boss-warning.victory {
    animation: victoryBounce 0.3s ease-in-out 3;
}

.boss-warning-content {
    background: rgba(139, 0, 0, 0.3);
    border: 2px solid rgba(255, 0, 0, 0.8);
    border-radius: 10px;
    padding: 8px 20px;
    text-align: center;
    box-shadow: 0 0 20px rgba(255, 0, 0, 0.6);
}

.boss-warning.victory .boss-warning-content {
    background: rgba(0, 139, 0, 0.3);
    border-color: rgba(0, 255, 0, 0.8);
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.6);
}

.boss-warning-icon {
    display: inline;
    font-size: 1.2em;
    margin-right: 5px;
}

.boss-warning-text {
    display: inline;
    font-size: 1.3em;
    font-weight: bold;
    color: #fff;
    text-shadow: 0 0 10px rgba(255, 0, 0, 0.8),
                 0 2px 5px rgba(0, 0, 0, 0.9);
    letter-spacing: 2px;
    animation: textFlash 0.5s ease-in-out infinite;
}

.boss-warning.victory .boss-warning-text {
    text-shadow: 0 0 10px rgba(0, 255, 0, 0.8),
                 0 2px 5px rgba(0, 0, 0, 0.9);
    animation: none;
}

@keyframes textFlash {
    0%, 100% { 
        opacity: 1;
    }
    50% { 
        opacity: 0.3;
    }
}

@keyframes victoryBounce {
    0%, 100% { transform: translateX(-50%) scale(1); }
    50% { transform: translateX(-50%) scale(1.15); }
}

/* Boss Health Bar */
.boss-health-container {
    display: none;
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 50;
    pointer-events: none;
}

.boss-health-container.active {
    display: block;
}

/* Overlay Screens */
.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    justify-content: center;
    align-items: center;
    z-index: 100;
    animation: fadeIn 0.3s ease;
}

.overlay.active {
    display: flex;
}

/* Pause Panel */
.pause-panel {
    background: linear-gradient(135deg, #2d3561 0%, #1a1f3a 100%);
    border: 3px solid #4fc3f7;
    border-radius: 20px;
    padding: 60px 80px;
    text-align: center;
    box-shadow: 0 0 50px rgba(79, 195, 247, 0.3);
    animation: scaleIn 0.4s ease;
}

.pause-panel h2 {
    font-size: 3em;
    margin: 0 0 20px 0;
    color: #fff;
    text-shadow: 0 0 20px rgba(79, 195, 247, 0.8);
}

.pause-hint {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.1em;
    margin-bottom: 30px;
}

.pause-panel button {
    margin: 10px;
    min-width: 200px;
}

/* Pause Menu Inventory */
.pause-inventory {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 15px;
    padding: 15px;
    margin: 20px 0;
}

.pause-inventory h3 {
    font-size: 1.2em;
    margin-bottom: 15px;
    color: #4fc3f7;
}

.pause-equipped-slots {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 10px;
}

.pause-equipment-slot {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    padding: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.pause-equipment-slot:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #4fc3f7;
    transform: translateY(-2px);
}

.pause-equipment-slot .slot-label {
    font-size: 1.5em;
    margin-bottom: 5px;
}

.pause-slot-content {
    font-size: 0.8em;
    color: rgba(255, 255, 255, 0.7);
    min-height: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.pause-slot-content.equipped {
    color: #4fc3f7;
    font-weight: bold;
}

/* Level Up Panel */
.level-up-panel {
    background: linear-gradient(135deg, #2d3561 0%, #1a1f3a 100%);
    border: 3px solid #ffd700;
    border-radius: 20px;
    padding: 40px;
    max-width: 800px;
    text-align: center;
    box-shadow: 0 0 50px rgba(255, 215, 0, 0.3);
    animation: scaleIn 0.4s ease;
}

.level-up-panel h2 {
    font-size: 2.5em;
    margin-bottom: 20px;
    color: #ffd700;
}

.upgrade-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.upgrade-option {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 15px;
    padding: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    pointer-events: all;
}

.upgrade-option:hover {
    transform: translateY(-5px);
    border-color: #34e89e;
    box-shadow: 0 5px 20px rgba(52, 232, 158, 0.4);
}

.upgrade-icon {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.upgrade-name {
    font-size: 1.2em;
    font-weight: bold;
    color: #34e89e;
    margin-bottom: 10px;
}

.upgrade-desc {
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.8);
}

/* Game Over Panel */
.game-over-panel {
    background: linear-gradient(135deg, #2d1b1b 0%, #1a1a1a 100%);
    border: 3px solid #ff4444;
    border-radius: 20px;
    padding: 40px;
    max-width: 600px;
    text-align: center;
    box-shadow: 0 0 50px rgba(255, 68, 68, 0.3);
    animation: scaleIn 0.4s ease;
}

.game-over-panel h2 {
    font-size: 2.5em;
    margin-bottom: 30px;
    color: #ff4444;
}

#finalStats {
    margin-bottom: 30px;
    font-size: 1.2em;
}

.final-stat {
    margin: 10px 0;
    padding: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: 15px 40px;
    margin: 10px;
    border: none;
    border-radius: 10px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    pointer-events: all;
}

.btn-primary {
    background: linear-gradient(135deg, #34e89e 0%, #0f3443 100%);
    color: white;
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(52, 232, 158, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

/* Achievements */
.achievements-button {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    color: #000;
    border: none;
    border-radius: 25px;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
    z-index: 10;
}

.achievements-button:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
}

.menu-shop-button {
    position: absolute;
    top: 20px;
    left: 20px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    color: #000;
    border: none;
    border-radius: 25px;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
    z-index: 10;
}

.menu-shop-button:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
}

.inventory-button {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    background: linear-gradient(135deg, #9370DB 0%, #8A2BE2 100%);
    color: #fff;
    border: none;
    border-radius: 25px;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(147, 112, 219, 0.3);
    z-index: 10;
}

.inventory-button:hover {
    transform: translateX(-50%) scale(1.1);
    box-shadow: 0 6px 20px rgba(147, 112, 219, 0.5);
}

.inventory-panel {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 20px;
    padding: 30px;
    max-width: 900px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
    border: 2px solid rgba(147, 112, 219, 0.3);
}

.inventory-panel h2 {
    text-align: center;
    color: #9370DB;
    font-size: 2em;
    margin-bottom: 20px;
    text-shadow: 0 0 20px rgba(147, 112, 219, 0.5);
}

.inventory-panel h3 {
    color: #fff;
    font-size: 1.3em;
    margin-bottom: 15px;
    margin-top: 25px;
}

.inventory-header {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.equipped-section {
    margin-bottom: 30px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 15px;
    border: 2px solid rgba(147, 112, 219, 0.2);
}

.equipped-slots {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.inventory-equipment-slot {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    padding: 15px;
    text-align: center;
}

 slot-label {
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 10px;
}

.inventory-slot-content {
    font-size: 1.1em;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}

.inventory-section {
    margin-bottom: 20px;
}

.inventory-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.inventory-item {
    background: rgba(0, 0, 0, 0.5);
    border: 2px solid;
    border-radius: 10px;
    padding: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.inventory-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(147, 112, 219, 0.4);
}

.inventory-item.equipped {
    background: rgba(147, 112, 219, 0.2);
    border-color: #9370DB !important;
}

.inventory-item.equipped::after {
    content: "✓ Equipped";
    position: absolute;
    top: 5px;
    right: 5px;
    background: #9370DB;
    color: #fff;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.7em;
    font-weight: bold;
}

.inventory-item-name {
    font-size: 1.1em;
    font-weight: bold;
    margin-bottom: 8px;
}

.inventory-item-type {
    font-size: 0.85em;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 10px;
    text-transform: uppercase;
}

.inventory-item-stats {
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: 10px;
}

.inventory-item-level {
    font-size: 0.9em;
    text-align: center;
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.level-up-btn {
    width: 100%;
    padding: 8px 12px;
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.85em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 8px;
}

.level-up-btn:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

.level-up-btn:active {
    transform: translateY(0);
}

.max-level {
    text-align: center;
    padding: 8px;
    background: rgba(255, 215, 0, 0.2);
    color: #FFD700;
    border-radius: 8px;
    font-size: 0.85em;
    font-weight: bold;
    margin-top: 8px;
}

.achievements-panel {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 20px;
    padding: 30px;
    max-width: 900px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: scaleIn 0.3s ease;
}

.achievements-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid rgba(255, 215, 0, 0.3);
}

.achievements-header h2 {
    margin: 0;
    color: #FFD700;
    font-size: 2em;
}

.achievement-progress {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.2em;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.achievement-card {
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 15px;
    transition: all 0.3s ease;
}

.achievement-card.unlocked {
    background: rgba(255, 215, 0, 0.1);
    border-color: rgba(255, 215, 0, 0.3);
}

.achievement-card.unlocked:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.3);
}

.achievement-card.locked {
    opacity: 0.5;
}

.achievement-icon {
    font-size: 2.5em;
    min-width: 50px;
    text-align: center;
}

.achievement-info {
    flex: 1;
}

.achievement-name {
    font-weight: bold;
    font-size: 1.1em;
    color: #fff;
    margin-bottom: 5px;
}

.achievement-card.unlocked .achievement-name {
    color: #FFD700;
}

.achievement-desc {
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.7);
}

/* Equipment HUD */
.equipment-hud {
    position: absolute;
    top: 120px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-end;
    z-index: 15;
}

.shop-button {
    padding: 12px 24px;
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    color: #000;
    border: none;
    border-radius: 25px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.shop-button:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
}

.equipment-slots {
    display: flex;
    gap: 8px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 15px;
    border: 2px solid rgba(255, 215, 0, 0.3);
}

.equipment-slot {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    transition: all 0.3s ease;
}

.equipment-slot:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 215, 0, 0.5);
}

.empty-slot {
    opacity: 0.3;
    font-size: 0.9em;
}

.equipped-item {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    border: 2px solid;
}

.equipped-icon {
    font-size: 1.8em;
}

/* Stage Complete Panel */
.stage-complete-panel {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 20px;
    padding: 40px;
    max-width: 600px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: scaleIn 0.3s ease;
}

.stage-complete-panel h2 {
    font-size: 2.5em;
    margin-bottom: 30px;
    color: #FFD700;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
}

.stage-rewards {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.reward-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: 15px;
    border: 2px solid rgba(255, 215, 0, 0.2);
}

.reward-label {
    display: block;
    font-size: 1.2em;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 10px;
}

.reward-value {
    font-size: 1.5em;
    font-weight: bold;
    color: #FFD700;
}

.equipment-reward-container {
    margin-top: 15px;
}

.equipment-reward {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 15px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    border: 3px solid;
    text-align: left;
    position: relative;
}

.equipment-level-display {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 0.9em;
    letter-spacing: 2px;
}

.equipment-icon {
    font-size: 3em;
    min-width: 60px;
    text-align: center;
}

.equipment-details {
    flex: 1;
}

.equipment-name {
    font-size: 1.3em;
    font-weight: bold;
    margin-bottom: 5px;
}

.equipment-rarity {
    font-size: 0.9em;
    opacity: 0.8;
    margin-bottom: 8px;
}

.equipment-stats {
    font-size: 0.95em;
    color: rgba(255, 255, 255, 0.9);
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.3em;
}

/* Shop Panel */
.shop-panel {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 20px;
    padding: 30px;
    max-width: 1000px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: scaleIn 0.3s ease;
}

.shop-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid rgba(255, 215, 0, 0.3);
}

.shop-header h2 {
    margin: 0;
    color: #FFD700;
    font-size: 2em;
}

.shop-coins {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3em;
    color: rgba(255, 255, 255, 0.8);
}

.coins-amount {
    font-weight: bold;
    color: #FFD700;
    font-size: 1.2em;
}

.shop-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.shop-item {
    background: rgba(255, 255, 255, 0.05);
    border: 3px solid;
    border-radius: 15px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all 0.3s ease;
}

.shop-item:hover:not(.unaffordable) {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.3);
}

.shop-item.unaffordable {
    opacity: 0.5;
}

.shop-item-level {
    font-size: 0.9em;
    text-align: center;
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.shop-item-icon {
    font-size: 3em;
    margin-bottom: 15px;
}

.shop-item-name {
    font-size: 1.2em;
    font-weight: bold;
    margin-bottom: 8px;
}

.shop-item-rarity {
    font-size: 0.9em;
    opacity: 0.8;
    margin-bottom: 12px;
}

.shop-item-stats {
    font-size: 0.85em;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 15px;
    line-height: 1.6;
}

.shop-buy-btn {
    padding: 10px 25px;
    background: linear-gradient(135deg, #34e89e 0%, #0f3443 100%);
    color: white;
    border: none;
    border-radius: 20px;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.shop-buy-btn:hover:not(.disabled) {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(52, 232, 158, 0.4);
}

.shop-buy-btn.disabled {
    background: rgba(128, 128, 128, 0.3);
    cursor: not-allowed;
}

.shop-footer {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    padding-top: 20px;
    border-top: 2px solid rgba(255, 255, 255, 0.1);
}

.shop-footer button {
    flex: 1;
}

/* Game Notification */
.game-notification {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px 40px;
    background: rgba(0, 0, 0, 0.9);
    border: 3px solid #FFD700;
    border-radius: 15px;
    color: #FFD700;
    font-size: 1.8em;
    font-weight: bold;
    text-align: center;
    z-index: 1000;
    animation: notificationPulse 0.5s ease;
    box-shadow: 0 0 30px rgba(255, 215, 0, 0.5);
}

.game-notification.fade-out {
    animation: fadeOut 0.5s ease forwards;
}

@keyframes notificationPulse {
    0% { transform: translate(-50%, -50%) scale(0.8); opacity: 0; }
    50% { transform: translate(-50%, -50%) scale(1.1); }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

@keyframes fadeOut {
    to { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
}

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    #characterSelect {
        padding: 20px;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    #characterSelect h1 {
        font-size: 1.8em;
        margin-bottom: 5px;
    }
    
    .game-subtitle {
        font-size: 1em;
        margin-bottom: 15px;
    }
    
    .character-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 15px;
        padding: 10px;
    }
    
    .character-card {
        padding: 15px;
    }
    
    .character-sprite {
        width: 80px;
        height: 80px;
    }
    
    .character-card h2 {
        font-size: 1.2em;
    }
    
    .character-ability,
    .character-desc {
        font-size: 0.8em;
    }
    
    .character-stats {
        font-size: 0.75em;
    }
    
    .hud-top {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .upgrade-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile Touch Controls */
.mobile-controls {
    display: none;
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 30;
}

/* Show mobile controls on touch devices */
@media (hover: none) and (pointer: coarse) {
    .mobile-controls {
        display: block;
    }
}

/* Virtual Joystick */
.joystick-container {
    position: absolute;
    bottom: 30px;
    left: 30px;
    width: 150px;
    height: 150px;
    pointer-events: all;
    touch-action: none;
}

.joystick-base {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(100, 100, 100, 0.5), rgba(50, 50, 50, 0.5));
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.joystick-stick {
    position: absolute;
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.8), rgba(200, 200, 200, 0.6));
    border: 3px solid rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
    transition: all 0.1s ease;
}

/* Mobile Ultimate Button */
.fire-button {
    position: absolute;
    bottom: 30px;
    right: 30px;
    width: 100px;
    height: 100px;
    touch-action: none;
    background: linear-gradient(135deg, #555, #333);
    border: 4px solid #666;
    border-radius: 50%;
    color: white;
    cursor: not-allowed;
    pointer-events: all;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    transition: all 0.2s ease;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
}

.mobile-ultimate-icon {
    font-size: 2.5em;
    margin-bottom: 2px;
}

.mobile-ultimate-label {
    font-size: 0.7em;
    font-weight: bold;
    letter-spacing: 1px;
}

.fire-button:active {
    transform: scale(0.95);
}

/* Ready state styles will be added dynamically via JS */
.fire-button.ready {
    background: linear-gradient(135deg, #ff6b00, #ff9800);
    border-color: #ffc107;
    cursor: pointer;
    opacity: 1;
    box-shadow: 0 0 40px rgba(255, 152, 0, 0.9);
    animation: mobilePulse 1.5s infinite;
}

@keyframes mobilePulse {
    0%, 100% { transform: scale(1); box-shadow: 0 0 40px rgba(255, 152, 0, 0.9); }
    50% { transform: scale(1.05); box-shadow: 0 0 60px rgba(255, 152, 0, 1); }
}

/* Responsive canvas */
@media (max-width: 768px) {
    body {
        overflow: hidden;
    }
    
    #gameCanvas {
        width: 100vw !important;
        height: 100vh !important;
        height: 100dvh !important;
    }
    
    .screen {
        height: 100vh;
        height: 100dvh;
    }
}

/* Landscape mobile optimization */
@media (max-height: 500px) and (orientation: landscape) {
    /* HUD Optimizations */
    .hud-top {
        padding: 5px 10px;
        gap: 5px;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .hud-item {
        padding: 5px 10px;
        font-size: 0.7em;
        white-space: nowrap;
        min-width: auto;
    }
    
    .hud-label {
        font-size: 0.8em;
    }
    
    .health-bar, .xp-bar, .ultimate-bar {
        width: 80px;
        height: 12px;
    }
    
    /* Equipment HUD */
    .equipment-hud {
        top: 60px;
        right: 10px;
    }
    
    .equipment-slot {
        width: 40px;
        height: 40px;
        font-size: 1.2em;
    }
    
    /* Ultimate button */
    .ultimate-button {
        bottom: 15px;
        padding: 10px 20px;
        font-size: 0.8em;
    }
    
    .ultimate-icon {
        font-size: 1.5em;
    }
    
    .ultimate-label {
        font-size: 0.9em;
    }
    
    .ultimate-hint {
        font-size: 0.65em;
    }
    
    /* Mobile controls adjustment */
    .joystick-container {
        width: 100px;
        height: 100px;
        bottom: 15px;
        left: 15px;
    }
    
    .joystick-stick {
        width: 40px;
        height: 40px;
    }
    
    .fire-button {
        width: 70px;
        height: 70px;
        bottom: 15px;
        right: 15px;
    }
    
    .mobile-ultimate-icon {
        font-size: 1.8em;
    }
    
    .mobile-ultimate-label {
        font-size: 0.6em;
    }
    
    .pause-button {
        width: 50px;
        height: 50px;
        right: 5px;
        top: 45%;
    }
    
    .pause-icon {
        font-size: 1.5em;
    }
    
    .boss-warning {
        top: 10%;
    }
    
    .boss-warning-content {
        padding: 5px 12px;
    }
    
    .boss-warning-text {
        font-size: 0.9em;
        letter-spacing: 1px;
    }
    
    .boss-warning-icon {
        font-size: 1em;
    }
    
    #characterSelect {
        padding: 10px 20px;
        overflow-y: auto;
        overflow-x: hidden;
        -webkit-overflow-scrolling: touch;
    }
    
    #characterSelect h1 {
        font-size: 1.5em;
        margin-bottom: 3px;
    }
    
    .game-subtitle {
        font-size: 0.9em;
        margin-bottom: 10px;
    }
    
    .achievements-button,
    .menu-shop-button {
        top: 10px;
        left: 10px;
        padding: 8px 16px;
        font-size: 0.85em;
    }
    
    .inventory-button {
        bottom: 10px;
        padding: 8px 16px;
        font-size: 0.85em;
    }
    
    .character-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 10px;
        max-width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .character-card {
        padding: 10px;
        min-width: 140px;
    }
    
    .character-sprite {
        width: 60px;
        height: 60px;
    }
    
    .character-card h2 {
        font-size: 1em;
        margin-bottom: 5px;
    }
    
    .character-ability {
        font-size: 0.7em;
        margin-bottom: 3px;
    }
    
    .character-desc {
        font-size: 0.65em;
        margin-bottom: 5px;
        min-height: auto;
    }
    
    .character-stats {
        font-size: 0.6em;
        gap: 2px;
    }
    
    /* Overlay Panels Mobile Optimization */
    .level-up-panel {
        max-width: 95%;
        max-height: 90vh;
        padding: 10px;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .shop-panel,
    .inventory-panel,
    .stage-complete-panel,
    .achievements-panel,
    .pause-panel {
        max-width: 95%;
        max-height: 85vh;
        padding: 15px;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .level-up-panel h2 {
        font-size: 1.1em;
        margin-bottom: 5px;
    }
    
    .level-up-panel p {
        font-size: 0.75em;
        margin-bottom: 5px;
    }
    
    .shop-panel h2,
    .inventory-panel h2,
    .stage-complete-panel h2,
    .achievements-panel h2,
    .pause-panel h2 {
        font-size: 1.3em;
        margin-bottom: 10px;
    }
    
    /* Pause Menu Mobile Optimization */
    .pause-panel {
        padding: 15px;
    }
    
    .pause-inventory {
        padding: 10px;
        margin: 10px 0;
    }
    
    .pause-inventory h3 {
        font-size: 1em;
        margin-bottom: 10px;
    }
    
    .pause-equipped-slots {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .pause-equipment-slot {
        padding: 8px;
    }
    
    .pause-equipment-slot .slot-label {
        font-size: 1.2em;
    }
    
    .pause-slot-content {
        font-size: 0.7em;
        min-height: 35px;
    }
    
    /* Stage Complete Mobile Optimization */
    .stage-complete-panel {
        padding: 10px;
        max-height: 90vh;
    }
    
    .stage-rewards {
        gap: 10px;
        margin-bottom: 15px;
    }
    
    .reward-item {
        padding: 10px;
    }
    
    .reward-label {
        font-size: 0.95em;
        margin-bottom: 5px;
    }
    
    .reward-value {
        font-size: 1.1em;
    }
    
    .equipment-reward {
        padding: 10px;
        gap: 10px;
    }
    
    .equipment-icon {
        font-size: 2em;
        min-width: 40px;
    }
    
    .equipment-name {
        font-size: 1em;
        margin-bottom: 3px;
    }
    
    .equipment-rarity {
        font-size: 0.8em;
        margin-bottom: 5px;
    }
    
    .equipment-stats {
        font-size: 0.85em;
    }
    
    .equipment-level-display {
        font-size: 0.75em;
        top: 5px;
        right: 5px;
    }
    
    .btn-large {
        padding: 12px 25px;
        font-size: 1em;
    }
    
    .upgrade-grid {
        gap: 6px;
        grid-template-columns: repeat(3, 1fr);
        margin-top: 8px;
    }
    
    .shop-grid,
    .inventory-grid,
    .achievements-grid {
        gap: 10px;
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
    
    .upgrade-option {
        padding: 8px;
        font-size: 0.75em;
    }
    
    .upgrade-icon {
        font-size: 1.8em !important;
        margin-bottom: 3px !important;
    }
    
    .upgrade-name {
        font-size: 0.9em !important;
        margin-bottom: 3px !important;
    }
    
    .upgrade-desc {
        font-size: 0.7em !important;
        line-height: 1.2;
    }
    
    .shop-item,
    .inventory-item,
    .achievement {
        padding: 10px;
        font-size: 0.8em;
    }
    
    .btn-primary,
    .btn-secondary {
        padding: 8px 16px;
        font-size: 0.85em;
    }
}

/* Portrait orientation warning for mobile */
@media (max-width: 768px) and (orientation: portrait) {
    body::before {
        content: "↻ Please rotate your device to landscape mode for the best experience";
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0, 0, 0, 0.95);
        color: white;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        padding: 20px;
        font-size: 1.5em;
        z-index: 9999;
    }
}

/* Ensure safe areas on notched devices */
@supports (padding: max(0px)) {
    body {
        padding-left: max(0px, env(safe-area-inset-left));
        padding-right: max(0px, env(safe-area-inset-right));
        padding-top: max(0px, env(safe-area-inset-top));
        padding-bottom: max(0px, env(safe-area-inset-bottom));
    }
}

/* ============================================
   CO-OP MODE STYLES
   ============================================ */

.coop-toggle-container {
    text-align: center;
    margin-bottom: 10px;
}

.coop-toggle-btn {
    background: linear-gradient(135deg, #2d3748, #4a5568);
    border: 2px solid #4a5568;
    color: #fff;
    padding: 10px 24px;
    border-radius: 25px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.coop-toggle-btn:hover {
    background: linear-gradient(135deg, #4a5568, #718096);
    border-color: #718096;
    transform: scale(1.05);
}

.coop-toggle-btn.active {
    background: linear-gradient(135deg, #2b6cb0, #3182ce);
    border-color: #63b3ed;
    box-shadow: 0 0 15px rgba(99, 179, 237, 0.4);
}

.p2-select-banner {
    text-align: center;
    padding: 8px 16px;
    margin-bottom: 8px;
    background: rgba(49, 130, 206, 0.2);
    border: 1px solid rgba(99, 179, 237, 0.3);
    border-radius: 8px;
    font-size: 0.9em;
    animation: p2-pulse 2s infinite;
}

@keyframes p2-pulse {
    0%, 100% { border-color: rgba(99, 179, 237, 0.3); }
    50% { border-color: rgba(99, 179, 237, 0.7); }
}

.p2-label {
    font-weight: bold;
    color: #63b3ed;
}

.p2-hint {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85em;
    margin-left: 12px;
}

/* P2 HUD */
.hud-bottom-right {
    position: fixed;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid rgba(99, 179, 237, 0.4);
    border-radius: 8px;
    padding: 8px 12px;
    z-index: 100;
    min-width: 160px;
}

.p2-hud-label {
    font-weight: bold;
    color: #63b3ed;
    font-size: 0.9em;
    margin-bottom: 4px;
    text-align: center;
}

.p2-health-fill {
    background: linear-gradient(90deg, #3182ce, #63b3ed) !important;
}

.p2-ult-fill {
    background: linear-gradient(90deg, #2b6cb0, #4299e1) !important;
}

.character-card.p2-selected {
    border-color: #63b3ed !important;
    box-shadow: 0 0 20px rgba(99, 179, 237, 0.5) !important;
    position: relative;
}

.character-card.p2-selected::after {
    content: '🎮 P2';
    position: absolute;
    top: 5px;
    right: 5px;
    background: #3182ce;
    color: white;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.75em;
    font-weight: bold;
}

/* Sound toggle button styles */
.sound-toggle-btn {
  background: rgba(30,30,40,0.92);
  color: #fff;
  border: 2px solid #444;
  border-radius: 24px;
  padding: 8px 16px;
  cursor: pointer;
  transition: background 0.2s, border 0.2s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.18);
  user-select: none;
}
.sound-toggle-btn:hover, .sound-toggle-btn:active {
  background: #222a;
  border-color: #888;
}
@media (max-width: 600px) {
  .sound-toggle-btn {
    font-size: 1em;
    padding: 6px 10px;
    top: 8px;
    right: 8px;
  }
}