body {
    margin: 0;
    overflow: hidden;
    background-color: #111;
    color: white;
    font-family: Arial, sans-serif;
}

#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
}

#game-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

#ui-container {
    position: absolute;
    bottom: 20px;
    left: 20px;
    z-index: 10;
}

#health-bar, #xp-bar {
    width: 300px;
    height: 20px;
    background-color: #333;
    margin-bottom: 10px;
    border-radius: 5px;
    overflow: hidden;
    position: relative;
}

#health-bar::after, #xp-bar::after {
    content: '';
    display: block;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    border-radius: 5px;
}

#health-bar::after {
    background-color: #e74c3c;
    width: var(--health-width, 100%);
    transition: width 0.3s;
}

#xp-bar::after {
    background-color: #2ecc71;
    width: var(--xp-width, 0%);
    transition: width 0.3s;
}

#level-display {
    font-size: 18px;
    font-weight: bold;
}

#level-up-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.8);
    padding: 20px;
    border-radius: 10px;
    z-index: 100;
    text-align: center;
    width: 80%;
    max-width: 600px;
    box-shadow: 0 0 30px rgba(46, 204, 113, 0.5);
}

#level-up-container h2 {
    color: #2ecc71;
    margin-top: 0;
    font-size: 24px;
}

#upgrade-options {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.upgrade-option {
    background-color: #333;
    padding: 15px;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, background-color 0.2s, box-shadow 0.3s;
    flex: 1;
    min-width: 150px;
    max-width: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.upgrade-option:hover {
    background-color: #555;
    transform: translateY(-5px);
}

/* Style upgrades by rarity */
.upgrade-option[data-rarity="common"] {
    border: 1px solid #95a5a6;
}

.upgrade-option[data-rarity="uncommon"] {
    border: 1px solid #2ecc71;
}

.upgrade-option[data-rarity="rare"] {
    border: 1px solid #f1c40f;
    box-shadow: 0 0 10px rgba(241, 196, 15, 0.3);
}

.upgrade-option[data-rarity="epic"] {
    border: 1px solid #9b59b6;
    box-shadow: 0 0 15px rgba(155, 89, 182, 0.4);
}

.upgrade-rarity {
    margin-top: 10px;
    font-size: 12px;
    padding: 3px 8px;
    border-radius: 10px;
    text-transform: capitalize;
}

.upgrade-option[data-rarity="common"] .upgrade-rarity {
    background-color: #95a5a6;
    color: #2c3e50;
}

.upgrade-option[data-rarity="uncommon"] .upgrade-rarity {
    background-color: #2ecc71;
    color: #fff;
}

.upgrade-option[data-rarity="rare"] .upgrade-rarity {
    background-color: #f1c40f;
    color: #2c3e50;
}

.upgrade-option[data-rarity="epic"] .upgrade-rarity {
    background-color: #9b59b6;
    color: #fff;
}

.upgrade-icon {
    font-size: 24px;
    margin-bottom: 10px;
}

.upgrade-option h3 {
    margin: 5px 0;
}

.upgrade-option p {
    margin: 5px 0;
    font-size: 14px;
    opacity: 0.8;
}

.hidden {
    display: none !important;
}

#game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.9);
    padding: 40px;
    border-radius: 10px;
    z-index: 200;
    text-align: center;
    width: 80%;
    max-width: 500px;
    box-shadow: 0 0 30px rgba(231, 76, 60, 0.7);
    animation: fade-in 0.5s;
}

#game-over h1 {
    color: #e74c3c;
    font-size: 36px;
    margin-top: 0;
    text-shadow: 0 0 10px rgba(231, 76, 60, 0.5);
}

#game-over p {
    font-size: 18px;
    margin: 15px 0;
}

#game-over .stats-highlight {
    color: #f1c40f;
    font-weight: bold;
    font-size: 110%;
}

#restart-button {
    background-color: #e74c3c;
    border: none;
    color: white;
    padding: 12px 24px;
    font-size: 18px;
    border-radius: 5px;
    margin-top: 20px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 0 #c0392b;
}

#restart-button:hover {
    background-color: #c0392b;
    transform: translateY(2px);
    box-shadow: 0 2px 0 #962d22;
}

#score-display {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 18px;
    font-weight: bold;
    z-index: 10;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 5px 10px;
    border-radius: 5px;
}

#timer-display {
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 18px;
    font-weight: bold;
    z-index: 10;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 5px 10px;
    border-radius: 5px;
}

.floating-text {
    position: absolute;
    color: white;
    font-weight: bold;
    pointer-events: none;
    animation: float-up 1s forwards;
    z-index: 20;
    text-shadow: 0 0 3px #000, 0 0 3px #000;
}

@keyframes float-up {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(-50px);
    }
}

/* Loading screen styles */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: #111;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

#loading-screen h1 {
    font-size: 48px;
    color: #2ecc71;
    margin-bottom: 20px;
    text-shadow: 0 0 15px rgba(46, 204, 113, 0.7);
    animation: title-glow 2s infinite alternate;
}

@keyframes title-glow {
    from { text-shadow: 0 0 5px rgba(46, 204, 113, 0.7); }
    to { text-shadow: 0 0 15px rgba(46, 204, 113, 0.9), 0 0 30px rgba(46, 204, 113, 0.5); }
}

#loading-bar {
    width: 300px;
    height: 20px;
    background-color: #333;
    border-radius: 10px;
    overflow: hidden;
    margin-top: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

#loading-progress {
    height: 100%;
    width: 0%;
    background-color: #2ecc71;
    transition: width 0.3s;
    background-image: linear-gradient(45deg, 
        rgba(255,255,255,0.15) 25%, 
        transparent 25%, 
        transparent 50%, 
        rgba(255,255,255,0.15) 50%, 
        rgba(255,255,255,0.15) 75%, 
        transparent 75%, 
        transparent);
    background-size: 40px 40px;
    animation: progress-bar-stripes 1s linear infinite;
}

@keyframes progress-bar-stripes {
    from { background-position: 40px 0; }
    to { background-position: 0 0; }
}

#loading-tip {
    margin-top: 20px;
    font-style: italic;
    opacity: 0.8;
    text-align: center;
    max-width: 80%;
}

#loading-screen.hidden {
    animation: fade-out 0.5s forwards;
}

@keyframes fade-out {
    from { opacity: 1; }
    to { opacity: 0; visibility: hidden; }
}

/* Pause screen styles */
.overlay-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.7);
    padding: 30px 50px;
    border-radius: 10px;
    text-align: center;
    font-size: 36px;
    font-weight: bold;
    color: white;
    z-index: 150;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.6);
    border: 2px solid #3498db;
    animation: pulse 2s infinite;
}

.pause-subtext {
    font-size: 18px;
    margin-top: 15px;
    opacity: 0.8;
    font-weight: normal;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(52, 152, 219, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(52, 152, 219, 0); }
    100% { box-shadow: 0 0 0 0 rgba(52, 152, 219, 0); }
}

@keyframes fade-in {
    from { opacity: 0; transform: translate(-50%, -60%); }
    to { opacity: 1; transform: translate(-50%, -50%); }
}

.control-button {
    position: absolute;
    top: 20px;
    right: 90px;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border: 2px solid #3498db;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    z-index: 100;
}

.control-button:hover {
    background-color: rgba(52, 152, 219, 0.3);
    transform: scale(1.1);
}

#controls-info {
    position: absolute;
    top: 65px;
    right: 20px;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    width: auto;
    white-space: nowrap;
}

#pause-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fade-in 0.3s;
}

.pause-content {
    background-color: rgba(20, 20, 20, 0.9);
    padding: 30px 50px;
    border-radius: 10px;
    text-align: center;
    border: 2px solid #3498db;
    box-shadow: 0 0 20px rgba(52, 152, 219, 0.5);
}

.pause-content h2 {
    color: #3498db;
    margin-top: 0;
    font-size: 36px;
}

.pause-content h3 {
    color: #f39c12;
    margin: 20px 0 10px;
}

.menu-button {
    background-color: #3498db;
    border: none;
    color: white;
    padding: 10px 20px;
    margin: 10px;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
    min-width: 150px;
}

.menu-button:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Minimap styles */
#minimap-container {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 150px;
    height: 150px;
    background-color: rgba(0, 0, 0, 0.7);
    border: 2px solid #3498db;
    border-radius: 5px;
    overflow: hidden;
    z-index: 50;
}

#minimap {
    width: 100%;
    height: 100%;
}

/* Skill cooldown indicator */
#skill-container {
    position: absolute;
    bottom: 20px;
    right: 190px;
    display: flex;
    gap: 10px;
    z-index: 50;
}

.skill {
    width: 50px;
    height: 50px;
    background-color: rgba(0, 0, 0, 0.7);
    border: 2px solid #3498db;
    border-radius: 5px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.skill-icon {
    font-size: 24px;
}

.skill-cooldown {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: rgba(52, 152, 219, 0.5);
    height: 0%;
    transition: height 0.1s linear;
}

.skill-key {
    position: absolute;
    bottom: -20px;
    font-size: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    padding: 2px 5px;
    border-radius: 3px;
}

/* Trail effect for player */
.player-trail {
    position: absolute;
    border-radius: 50%;
    background-color: rgba(52, 152, 219, 0.3);
    pointer-events: none;
    z-index: 5;
    animation: fade-out-fast 0.5s forwards;
}

@keyframes fade-out-fast {
    from { opacity: 0.7; transform: scale(1); }
    to { opacity: 0; transform: scale(0.5); }
}

/* Tutorial tip animation */
.tutorial-tip {
    animation: fade-in 0.5s, fade-out-delayed 1s 4s forwards;
    font-size: 24px;
    max-width: 80%;
}

.tutorial-subtip {
    font-size: 18px;
    opacity: 0.8;
    font-weight: normal;
    display: block;
    margin-top: 10px;
}

@keyframes fade-out-delayed {
    from { opacity: 1; }
    to { opacity: 0; visibility: hidden; }
}

/* Sound toggle button */
#sound-button {
    top: 20px;
    right: 140px;
}

/* Game Over tip styles */
.game-over-tip {
    font-style: italic;
    color: #3498db;
    font-size: 14px;
    margin-top: 15px;
    background-color: rgba(52, 152, 219, 0.1);
    padding: 8px;
    border-radius: 5px;
}

/* Add pulsing effect to skill when it's ready */
.skill-ready {
    animation: pulse-skill 1.5s infinite;
}

@keyframes pulse-skill {
    0% { box-shadow: 0 0 0 0 rgba(52, 152, 219, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(52, 152, 219, 0); }
    100% { box-shadow: 0 0 0 0 rgba(52, 152, 219, 0); }
}

/* Minimap border highlight when enemies are close */
.minimap-alert {
    border-color: #e74c3c;
    animation: pulse-minimap 1s infinite;
}

@keyframes pulse-minimap {
    0% { border-color: #e74c3c; }
    50% { border-color: #f39c12; }
    100% { border-color: #e74c3c; }
}

/* Enemy display counts above minimap */
#enemy-counter {
    position: absolute;
    bottom: 175px;
    right: 20px;
    background-color: rgba(0, 0, 0, 0.7);
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 14px;
    color: #e74c3c;
}

/* Keyboard shortcut indicators */
.shortcut-key {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: rgba(0, 0, 0, 0.6);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    border: 2px solid #fff;
    font-size: 14px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
}

/* Highlight the shortcut key when hovering over the upgrade option */
.upgrade-option:hover .shortcut-key {
    background-color: rgba(52, 152, 219, 0.8);
}

/* Different colors for different rarity levels */
.upgrade-option[data-rarity="uncommon"] .shortcut-key {
    border-color: #2ecc71;
}

.upgrade-option[data-rarity="rare"] .shortcut-key {
    border-color: #f1c40f;
}

.upgrade-option[data-rarity="epic"] .shortcut-key {
    border-color: #9b59b6;
}

/* Shortcut hint styles */
.shortcut-hint {
    color: #aaa;
    font-size: 14px;
    font-style: italic;
    margin-top: -5px;
    margin-bottom: 15px;
}

/* Boss health bar */
#boss-health-container {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 100;
}

.boss-name {
    font-size: 18px;
    font-weight: bold;
    color: #f1c40f;
    margin-bottom: 5px;
    text-shadow: 0 0 8px rgba(231, 76, 60, 0.8);
}

#boss-health-bar {
    width: 100%;
    height: 15px;
    background-color: #333;
    border-radius: 5px;
    position: relative;
    box-shadow: 0 0 10px rgba(231, 76, 60, 0.7);
    overflow: hidden;
}

#boss-health-bar::after {
    content: '';
    display: block;
    height: 100%;
    width: var(--boss-health-width, 100%);
    background-color: #e74c3c;
    border-radius: 5px;
    transition: width 0.3s;
}

#boss-health-bar.critical::after {
    background-color: #c0392b;
    animation: pulse-boss 0.8s infinite;
}

#boss-health-bar.phase-transition::after {
    background-color: #f39c12;
}

@keyframes pulse-boss {
    0% { background-color: #c0392b; }
    50% { background-color: #e74c3c; }
    100% { background-color: #c0392b; }
}

/* Boss mode screen effect */
.boss-active {
    animation: boss-border-pulse 2s infinite;
}

@keyframes boss-border-pulse {
    0% { box-shadow: inset 0 0 0 3px rgba(231, 76, 60, 0); }
    50% { box-shadow: inset 0 0 0 3px rgba(231, 76, 60, 0.5); }
    100% { box-shadow: inset 0 0 0 3px rgba(231, 76, 60, 0); }
}

/* Style for stacked upgrades */
.stacked-upgrade {
    background: linear-gradient(rgba(20, 20, 20, 0.8), rgba(20, 20, 20, 0.9));
    box-shadow: 0 0 10px #e67e22;
    transform: scale(1.05);
    position: relative;
    overflow: hidden;
}

.stacked-upgrade::after {
    content: "";
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        transparent,
        transparent,
        transparent,
        rgba(230, 126, 34, 0.1),
        rgba(230, 126, 34, 0.3),
        rgba(230, 126, 34, 0.1),
        transparent
    );
    transform: rotate(45deg);
    animation: stackShine 2s linear infinite;
}

.stack-indicator {
    position: absolute;
    top: 5px;
    right: 5px;
    background-color: #e67e22;
    color: white;
    font-size: 12px;
    padding: 3px 6px;
    border-radius: 3px;
    font-weight: bold;
}

@keyframes stackShine {
    0% {
        transform: translate(-100%, -100%) rotate(45deg);
    }
    100% {
        transform: translate(100%, 100%) rotate(45deg);
    }
}

@keyframes stackGlow {
    0% {
        box-shadow: 0 0 5px #e67e22;
    }
    100% {
        box-shadow: 0 0 15px #e67e22, 0 0 20px #e67e22;
    }
}

/* Win screen styles */
#win-screen {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.9);
    padding: 30px;
    border-radius: 10px;
    z-index: 1000;
    text-align: center;
    width: 80%;
    max-width: 600px;
    box-shadow: 0 0 40px rgba(241, 196, 15, 0.7);
    animation: victory-glow 2s infinite alternate;
    overflow-y: auto;
    max-height: 80vh;
}

#win-screen h1 {
    color: #f1c40f;
    font-size: 48px;
    margin-bottom: 10px;
    text-shadow: 0 0 10px rgba(241, 196, 15, 0.7);
}

#win-screen h2 {
    color: #f39c12;
    font-size: 28px;
    margin-bottom: 20px;
}

#win-screen p {
    color: #ecf0f1;
    margin: 10px 0;
    font-size: 18px;
}

#win-screen .stats-highlight {
    color: #f1c40f;
    font-weight: bold;
    font-size: 22px;
}

.upgrades-container {
    margin: 20px 0;
    background-color: rgba(44, 62, 80, 0.6);
    padding: 15px;
    border-radius: 8px;
}

.upgrades-container h3 {
    color: #2ecc71;
    margin-top: 0;
    margin-bottom: 10px;
}

.upgrade-list {
    list-style-type: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.upgrade-list li {
    background-color: rgba(52, 152, 219, 0.3);
    padding: 5px 12px;
    border-radius: 15px;
    color: #ecf0f1;
    font-size: 14px;
}

#play-again-button {
    background-color: #f39c12;
    border: none;
    color: white;
    padding: 12px 30px;
    font-size: 20px;
    margin-top: 20px;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 15px rgba(243, 156, 18, 0.5);
}

#play-again-button:hover {
    background-color: #f1c40f;
    transform: scale(1.05);
}

.victory-message {
    color: #2ecc71;
    font-style: italic;
    margin-top: 15px;
}

@keyframes victory-glow {
    from {
        box-shadow: 0 0 20px rgba(241, 196, 15, 0.7);
    }
    to {
        box-shadow: 0 0 30px rgba(241, 196, 15, 1);
    }
}