:root {
    --primary: #00B894;
    --secondary: #55EFC4;
    --accent: #FDCB6E;
    --bg-color: #0A1A14;
    --text-color: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --font-family: 'Inter', system-ui, sans-serif;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    overflow: hidden;
    touch-action: none;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    max-width: 800px;
    background: #11221c;
    box-shadow: 0 0 50px rgba(0,0,0,0.5);
    overflow: hidden;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
    image-rendering: pixelated;
}

#ui-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 20px;
    box-sizing: border-box;
    z-index: 10;
}

#hud-top {
    display: flex;
    gap: 12px;
}

.hud-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    padding: 8px 16px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    pointer-events: auto;
    font-size: 14px;
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

#hud-bottom {
    display: flex;
    justify-content: center;
    width: 100%;
}

.toolbar {
    display: flex;
    gap: 16px;
    justify-content: center;
    pointer-events: auto;
    background: var(--glass-bg);
    padding: 12px 24px;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.tool-btn {
    background: transparent;
    border: 1px solid transparent;
    font-size: 24px;
    cursor: pointer;
    width: 56px;
    height: 56px;
    border-radius: 14px;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.05);
}

.tool-btn:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

.tool-btn:active {
    transform: scale(0.95);
}

.tool-btn.active {
    background: var(--primary);
    box-shadow: 0 0 15px var(--primary);
    border-color: var(--secondary);
    transform: translateY(-4px);
}

.modal {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: auto;
    z-index: 100;
    backdrop-filter: blur(5px);
    transition: opacity 0.3s;
}

.hidden {
    opacity: 0;
    pointer-events: none;
}

.glass-panel {
    background: rgba(20, 30, 25, 0.85);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 32px;
    width: 90%;
    max-width: 400px;
    color: white;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    transform: scale(1);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.hidden .glass-panel {
    transform: scale(0.9);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 16px;
}

.modal-header h2 {
    margin: 0;
    color: var(--secondary);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.close-btn {
    background: none;
    border: none;
    color: rgba(255,255,255,0.6);
    font-size: 28px;
    cursor: pointer;
    transition: color 0.2s;
    line-height: 1;
}

.close-btn:hover {
    color: white;
}

.shop-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 24px;
    padding-right: 4px;
}

.shop-grid::-webkit-scrollbar {
    width: 6px;
}
.shop-grid::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.2);
    border-radius: 3px;
}

.shop-item {
    background: rgba(255,255,255,0.05);
    border-radius: 12px;
    padding: 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.shop-item:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

.shop-item.selected {
    border-color: var(--accent);
    background: rgba(253, 203, 110, 0.15);
    box-shadow: 0 0 15px rgba(253, 203, 110, 0.2);
}

.shop-icon {
    width: 32px;
    height: 32px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    font-size: 24px; /* Fallback */
    display: flex;
    align-items: center;
    justify-content: center;
}

.shop-name {
    font-size: 12px;
    font-weight: 600;
}

.shop-price {
    font-size: 12px;
    color: var(--accent);
    font-weight: bold;
    background: rgba(0,0,0,0.3);
    padding: 2px 6px;
    border-radius: 4px;
}

.modal-footer {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
}

.action-btn {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    border: none;
    border-radius: 12px;
    color: #0A1A14;
    font-weight: 800;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.action-btn:hover {
    background: var(--secondary);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 184, 148, 0.4);
}

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

/* Animations */
@keyframes shake {
    0% { transform: translate(1px, 1px) rotate(0deg); }
    10% { transform: translate(-1px, -2px) rotate(-1deg); }
    20% { transform: translate(-3px, 0px) rotate(1deg); }
    30% { transform: translate(3px, 2px) rotate(0deg); }
    40% { transform: translate(1px, -1px) rotate(1deg); }
    50% { transform: translate(-1px, 2px) rotate(-1deg); }
    60% { transform: translate(-3px, 1px) rotate(0deg); }
    70% { transform: translate(3px, 1px) rotate(-1deg); }
    80% { transform: translate(-1px, -1px) rotate(1deg); }
    90% { transform: translate(1px, 2px) rotate(0deg); }
    100% { transform: translate(1px, -2px) rotate(-1deg); }
}

.shake {
    animation: shake 0.5s;
    animation-iteration-count: 1;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .glass-panel {
        padding: 20px;
        width: 95%;
    }

    .toolbar {
        padding: 8px 16px;
    }

    .tool-btn {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
}