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

body {
    font-family: 'Arial', sans-serif;
    background-color: #1a1a2e;
    color: #eee;
    overflow: hidden;
}

.game-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Top Bar */
.top-bar {
    background-color: #16213e;
    padding: 10px 20px;
    display: flex;
    justify-content: space-around;
    border-bottom: 2px solid #0f3460;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 18px;
}

.stat-label {
    font-size: 14px;
    color: #aaa;
    margin-bottom: 2px;
}

#health {
    color: #ff6b6b;
    font-weight: bold;
}

#points {
    color: #4ecdc4;
    font-weight: bold;
}

#enemies-killed {
    color: #ffe66d;
    font-weight: bold;
}

/* Game Canvas */
#gameCanvas {
    background-color: #0e1621;
    display: block;
    margin: 0 auto;
    border: 2px solid #0f3460;
    flex-grow: 1;
}

/* Bottom Bar */
.bottom-bar {
    background-color: #16213e;
    padding: 15px 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    border-top: 2px solid #0f3460;
    min-height: 100px;
    flex-wrap: wrap;
}

.upgrade-btn, .ability-btn {
    background-color: #0f3460;
    border: 2px solid #4ecdc4;
    color: #eee;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 120px;
    font-size: 12px;
}

.upgrade-btn:hover, .ability-btn:hover {
    background-color: #4ecdc4;
    color: #0f3460;
    transform: translateY(-2px);
}

.upgrade-btn:disabled, .ability-btn:disabled {
    background-color: #2a2a2a;
    border-color: #555;
    color: #888;
    cursor: not-allowed;
    transform: none;
}

/* Autocast enabled styling */
.upgrade-btn.autocast-enabled, .ability-btn.autocast-enabled {
    border-color: #ffe66d !important;
    box-shadow: 0 0 15px rgba(255, 230, 109, 0.6) !important;
    position: relative;
}

.upgrade-btn.autocast-enabled::after, .ability-btn.autocast-enabled::after {
    content: "🔄";
    position: absolute;
    top: 2px;
    right: 2px;
    font-size: 10px;
    text-shadow: 0 0 3px rgba(0, 0, 0, 0.8);
    z-index: 1;
}

.upgrade-btn.autocast-enabled:hover, .ability-btn.autocast-enabled:hover {
    box-shadow: 0 0 20px rgba(255, 230, 109, 0.8) !important;
}

.upgrade-name {
    font-weight: bold;
    margin-bottom: 2px;
}

.upgrade-level, .upgrade-cost {
    font-size: 10px;
    margin: 1px 0;
}

.upgrade-cost {
    color: #ffe66d;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: #16213e;
    border: 3px solid #0f3460;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.modal-content h2 {
    color: #ff6b6b;
    margin-bottom: 15px;
    font-size: 28px;
}

.modal-content p {
    margin-bottom: 10px;
    font-size: 16px;
}

#restart-btn {
    background-color: #4ecdc4;
    border: none;
    color: #0f3460;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    margin-top: 15px;
    transition: all 0.3s ease;
}

#restart-btn:hover {
    background-color: #45b7aa;
    transform: translateY(-2px);
}

/* Responsive adjustments */
@media (max-width: 900px) {
    #gameCanvas {
        width: 100%;
        max-width: 800px;
    }
    
    .bottom-bar {
        padding: 10px 15px;
        gap: 10px;
    }
    
    .upgrade-btn, .ability-btn {
        min-width: 110px;
        font-size: 11px;
        padding: 6px 10px;
    }
}