:root {
    --primary-color: #d4c4b0;
    --secondary-color: #a8956b;
    --accent-color: #3a2f25;
    --background-light: #f8f3ec;
    --background-dark: #1a1a1a;
    --text-color: #3a2f25;
    --shadow-color: rgba(58, 47, 37, 0.25);
    --card-background: #e6d7b8;
    --marble-highlight: rgba(255, 255, 255, 0.3);
    --marble-shadow: rgba(0, 0, 0, 0.15);
    --marble-gradient: linear-gradient(145deg, #e6d7b8 0%, #d1c1a0 50%, #f1e4c3 100%);
    --marble-border: #b8a482;
}

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

body {
    min-height: 100vh;
    background: var(--background-light);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: background-color 0.3s ease;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Shift content only when hacker panel is open */
body.hacker-open {
    padding-left: 320px;
}

.game-container {
    position: relative;
    width: 95vw;
    height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
}

#gameCanvas {
    position: relative;
    background: var(--marble-gradient);
    border-radius: clamp(6px, 1.5vw, 10px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2),
        inset 0 1px 4px rgba(255, 255, 255, 0.3);
    max-width: 100%;
    max-height: calc(100% - 100px);
}

#gameCanvas::before {
    content: "";
    position: absolute;
    top: -8px;
    left: -8px;
    right: -8px;
    bottom: -8px;
    background: linear-gradient(145deg, #cab394 0%, #a8956b 50%, #d1c1a0 100%);
    border-radius: clamp(10px, 2vw, 14px);
    z-index: -1;
    box-shadow: 0 0 0 2px var(--marble-border), 0 0 0 4px var(--secondary-color),
        0 8px 32px rgba(0, 0, 0, 0.3);
}

.score-container {
    display: flex;
    justify-content: center;
    gap: 4rem;
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--accent-color);
    text-shadow: 2px 2px 4px var(--shadow-color);
    margin-bottom: 1rem;
}

.controls {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

button {
    position: relative;
    background: var(--primary-color);
    border: 3px solid var(--secondary-color);
    border-radius: 12px;
    padding: 0.8rem 1.6rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent-color);
    text-shadow: 1px 1px 0px rgba(255, 255, 255, 0.7);
    cursor: pointer;
    transition: all 0.15s ease;
    box-shadow: 0 6px 0 #8b7a54, 0 8px 15px var(--shadow-color);
    transform: translateY(0);
}

button::before {
    content: "";
    position: absolute;
    top: 2px;
    left: 4px;
    right: 4px;
    height: 3px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 8px 8px 0 0;
    pointer-events: none;
}

button:hover {
    transform: translateY(-2px);
    background: #e8ddd0;
    box-shadow: 0 8px 0 #8b7a54, 0 10px 20px var(--shadow-color);
}

button:active {
    transform: translateY(4px);
    box-shadow: 0 2px 0 #8b7a54, 0 4px 8px var(--shadow-color);
}

.upgrades-panel {
    position: fixed;
    right: -320px;
    top: 0;
    width: 320px;
    height: 100vh;
    background: var(--marble-gradient);
    padding: 2rem;
    transition: right 0.3s ease;
    box-shadow: -4px 0 24px var(--shadow-color);
    overflow-y: auto;
    z-index: 1000;
}

.upgrades-panel.visible {
    right: 0;
}

/* Hacker panel on the left */
.hacker-panel {
    position: fixed;
    left: -320px;
    top: 0;
    width: 320px;
    height: 100vh;
    background: var(--marble-gradient);
    padding: 2rem 1.5rem;
    transition: left 0.3s ease;
    box-shadow: 4px 0 24px var(--shadow-color);
    overflow-y: auto;
    z-index: 1000;
}

.hacker-panel.visible {
    left: 0;
}

.toggle-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hacker-panel .upgrade-item h3 { margin: 0; }
.hacker-panel .upgrade-description { margin: 0.5rem 0 0.75rem; }

/* Aimbot visuals: we draw red squares via canvas strokes; no CSS needed for that */

.coins {
    position: relative;
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 2rem;
    padding: 1rem;
    border-radius: clamp(6px, 1.5vw, 10px);
    background: var(--marble-gradient);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2),
        inset 0 1px 4px rgba(255, 255, 255, 0.3);
}

.upgrade-item {
    position: relative;
    background: var(--marble-gradient);
    padding: 1.5rem;
    border-radius: clamp(6px, 1.5vw, 10px);
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2),
        inset 0 1px 4px rgba(255, 255, 255, 0.3);
}


.upgrade-item::before {
    content: "";
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    background: linear-gradient(145deg, #cab394 0%, #a8956b 50%, #d1c1a0 100%);
    border-radius: clamp(8px, 1.8vw, 12px);
    z-index: -1;
    box-shadow: 0 0 0 2px var(--marble-border), 0 0 0 4px var(--secondary-color),
        0 8px 32px rgba(0, 0, 0, 0.3);
}

.upgrade-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.upgrade-progress {
    flex-grow: 1;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    margin-left: 1rem;
    overflow: hidden;
}

.upgrade-progress-bar {
    height: 100%;
    background: var(--primary-color);
    width: 0%;
    transition: width 0.3s ease;
}

.upgrade-description {
    color: #666;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.skin-previews {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin: 1rem 0;
}

.paddle-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: background-color 0.2s ease;
}

.paddle-preview:hover {
    background: #f5f5f5;
}

.paddle-preview.active {
    background: #f0f0f0;
}

.preview-paddle {
    width: 10px;
    height: 60px;
    border-radius: 4px;
}

.preview-paddle.normal {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
}

.preview-paddle.crystal {
    background: linear-gradient(to right, #88c0d0, #5e81ac);
}

.preview-paddle.gold {
    background: linear-gradient(to right, #ffd700, #ffa500);
}

.pause-indicator {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-size: 1.5rem;
    display: none;
    z-index: 2000;
}

.pause-indicator.visible {
    display: flex;
}

@media (max-width: 768px) {
    .game-container {
    padding: 0.5rem;
    }
    
    .controls {
        flex-direction: column;
    }
    
    .score-container {
        font-size: 2rem;
        gap: 2rem;
    }
    
    .upgrades-panel {
        width: 100%;
        right: -100%;
    }
    .hacker-panel {
        width: 80%;
        left: -80%;
    }
    body.hacker-open {
        padding-left: 0; /* overlay on small screens */
    }
}

/* Dark theme improvements */
body.dark-mode {
    --background-light: #0f1115;
    --text-color: #e6e6e6;
    --primary-color: #3a3f4b;
    --secondary-color: #6b86a8;
    --accent-color: #e8e1d9;
    --card-background: #1a1f27;
    --marble-gradient: linear-gradient(145deg, #161b22 0%, #0f141a 50%, #1e2430 100%);
    --marble-border: #2b3542;
}

body.dark-mode #gameCanvas::before {
    background: linear-gradient(145deg, #2b3542 0%, #6b86a8 50%, #1e2430 100%);
}

body.dark-mode .score-container { color: #e8e1d9; }
body.dark-mode .upgrade-item::before { box-shadow: 0 0 0 2px #2b3542, 0 0 0 4px #6b86a8, 0 8px 32px rgba(0,0,0,0.5); }
body.dark-mode button { background: #3a3f4b; border-color: #6b86a8; color: #e8e1d9; box-shadow: 0 6px 0 #324152, 0 8px 15px rgba(0,0,0,0.4); }
body.dark-mode button:hover { background: #4a5262; box-shadow: 0 8px 0 #324152, 0 12px 22px rgba(0,0,0,0.45); }
body.dark-mode button:active { box-shadow: 0 2px 0 #324152, 0 6px 10px rgba(0,0,0,0.5); }