/* Web Fonts Loading */
@font-face {
    font-family: 'Press Start 2P';
    src: url('PressStart2P-Regular.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
}

@font-face {
    font-family: 'Pixelify Sans';
    src: url('PixelifySans-VariableFont_wght.woff2') format('woff2');
    font-weight: 400 700;
    font-style: normal;
}

/* Simple 8-Bit Terminal Colors Palette */
:root {
    --bg-dark: #000000; /* Pure Black Background */
    --panel-bg: #111111;
    --border-color: #2A2A2A;
    --text-light: #F2F2F2;
    --text-muted: #777777;
    
    /* Muted accent shades */
    --accent-blue: #7FA8D8;
    --accent-green: #8ABF88;
    --accent-orange: #C9A76A;
    --accent-purple: #9C88C7;
    --danger: #C56A6A;
}

/* Global Reset: Full Screen Immersive Mode */
html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    overscroll-behavior: none;
    touch-action: none;
    background-color: #000000;
    color: var(--text-light);
    font-family: 'Pixelify Sans', 'Press Start 2P', monospace;
    image-rendering: pixelated;
    position: fixed;
    inset: 0;
}

#totalWrapper {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    padding: 10px;
    overflow: hidden;
}

/* Animated RGB Header Title */
.rgb-title {
    font-family: 'Press Start 2P', monospace;
    font-size: 1.4rem;
    text-align: center;
    margin: 0 0 8px 0;
    background: linear-gradient(to right, #ff4d4d, #ffff33, #33cc33, #3399ff, #ff3399);
    background-size: 400% 400%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: rgb-shift 5s ease-in-out infinite;
    letter-spacing: 2px;
    user-select: none;
    -webkit-user-select: none;
}

@keyframes rgb-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Main game container matching the Sandboxels alignment */
#gameWrapper {
    width: 750px;
    max-width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}

/* Canvas container */
#gameDiv {
    position: relative;
    width: 100%;
    background-color: #000000;
    border: 1px solid var(--border-color);
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}

#renderer {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16/10;
    image-rendering: pixelated;
    cursor: crosshair;
    touch-action: none;
}

/* Stats HUD Row directly below canvas */
#statsBar {
    width: 100%;
    background-color: #000000;
    padding: 6px 4px;
    box-sizing: border-box;
    display: flex;
    justify-content: flex-start;
    gap: 16px;
    font-family: 'Press Start 2P', monospace;
    font-size: 0.55rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

#statsBar span {
    white-space: nowrap;
}

/* Developer F3 Overlay */
#debugOverlay {
    position: absolute;
    top: 8px;
    left: 8px;
    background: rgba(0, 0, 0, 0.95);
    border: 1px solid var(--border-color);
    padding: 8px;
    font-family: monospace;
    font-size: 0.72rem;
    color: var(--accent-green);
    line-height: 1.3;
    pointer-events: none;
    z-index: 50;
}

/* Compact Scrollable Control Panel */
#controlPanel {
    width: 100%;
    flex: 1;
    overflow-y: auto;
    background-color: #000000;
    box-sizing: border-box;
    padding: 6px 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-height: 0; /* Enable internal scroll */
}

/* Custom Webkit scrollbar for clean dark look */
#controlPanel::-webkit-scrollbar {
    width: 6px;
}
#controlPanel::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 3px;
}

/* Horizontal wrapping rows of controls */
.controls-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px;
    padding: 2px 0;
}

.controls-row-gravity, .controls-row-presets {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px;
    padding: 4px 0;
    border-bottom: 1px dashed var(--border-color);
}

.row-label {
    font-family: 'Press Start 2P', monospace;
    font-size: 0.5rem;
    color: var(--text-muted);
    margin-right: 4px;
}

/* Round pill buttons */
button {
    font-family: 'Press Start 2P', monospace;
    font-size: 0.52rem;
    padding: 6px 10px;
    border-radius: 4px; /* Rounded pill style */
    cursor: pointer;
    border: 1px solid transparent;
    text-align: center;
    transition: filter 0.1s ease;
}

button:hover {
    filter: brightness(1.2);
}

button:active {
    filter: brightness(0.8);
}

/* System Button row styles */
.sys-btn {
    background-color: #1a1a1a;
    border: 1px solid var(--border-color);
    color: var(--text-light);
}

.sys-btn.active {
    background-color: #333333 !important;
    border-color: #666666 !important;
}

.replace-label {
    font-family: 'Press Start 2P', monospace;
    font-size: 0.52rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    margin-left: 6px;
    user-select: none;
}

/* Special Tool Buttons colored backgrounds matching screenshot */
.tool-btn {
    font-family: 'Press Start 2P', monospace;
    color: #000000; /* Dark text for bright colors */
    border: 1px solid transparent;
}

.tool-btn.active {
    border: 1px solid #ffffff !important;
    box-shadow: 0 0 4px rgba(255, 255, 255, 0.5);
}

.erase-btn { background-color: #ffb3d9; } /* Pink */
.drag-btn { background-color: #d9f2d9; } /* Light Green */
.pick-btn { background-color: #ffffcc; } /* Pale Yellow */
.brush-btn { background-color: #cceeff; } /* Cyan/Blue */
.heat-btn { background-color: #ff4d4d; color: #ffffff; } /* Red */
.cool-btn { background-color: #4da6ff; color: #ffffff; } /* Blue */
.shock-btn { background-color: #ffff33; } /* Yellow */
.wind-btn { background-color: #e0e0e0; } /* Gray */
.explode-btn { background-color: #cc0000; color: #ffffff; } /* Dark Red */
.rain-btn { background-color: #99ccff; } /* Rain Blue */
.lightning-btn { background-color: #ff9933; } /* Orange Strike */
.line-btn { background-color: #d8c2e6; } /* Lilac */
.fill-btn { background-color: #ffd8b3; } /* Peach */

/* Category Selection Tabs */
.category-tabs {
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 6px 0;
}

.cat-tab {
    background-color: transparent;
    border: none;
    color: var(--text-muted);
    font-family: 'Press Start 2P', monospace;
    font-size: 0.5rem;
    padding: 6px 8px;
    border-bottom: 2px solid transparent;
    border-radius: 0;
}

.cat-tab:hover {
    color: var(--text-light);
}

.cat-tab.active {
    color: var(--text-light) !important;
    border-bottom: 2px solid var(--accent-tab, var(--accent-blue)) !important;
}

/* Material Selection Layout */
.elements-grid, .presets-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 6px 0;
}

#materialSearch {
    background-color: #121212;
    border: 1px solid var(--border-color);
    color: var(--text-light);
    font-family: 'Pixelify Sans', monospace;
    font-size: 0.82rem;
    padding: 4px 8px;
    max-width: 140px;
    box-sizing: border-box;
    border-radius: 4px;
    margin-left: auto;
}

#materialSearch:focus {
    outline: none;
    border-color: var(--text-light);
}

.header-with-search {
    width: 100%;
    display: flex;
    align-items: center;
}

.element-btn {
    font-family: 'Pixelify Sans', monospace;
    font-size: 0.85rem;
    font-weight: 700;
    padding: 5px 9px;
    border-radius: 4px;
    border: 1px solid transparent;
    cursor: pointer;
}

.preset-btn {
    background-color: #1a1a1a;
    border: 1px solid var(--border-color);
    color: var(--text-light);
}

/* Footer Section */
#gameFooter {
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 8px 4px;
    border-top: 1px solid var(--border-color);
    box-sizing: border-box;
    font-family: 'Press Start 2P', monospace;
    font-size: 0.42rem;
    color: var(--text-muted);
}

/* Canvas Shake Animation */
@keyframes shake-frame {
    0% { transform: translate(0, 0); }
    20% { transform: translate(-4px, 2px); }
    40% { transform: translate(4px, -2px); }
    60% { transform: translate(-2px, -4px); }
    80% { transform: translate(2px, 4px); }
    100% { transform: translate(0, 0); }
}

.shake-canvas {
    animation: shake-frame 0.2s ease-in-out;
}

/* Mobile responsive scaling overrides */
@media screen and (max-width: 768px) {
    html, body {
        position: fixed;
        width: 100%;
        height: 100%;
        overflow: hidden;
    }

    #totalWrapper {
        height: 100dvh;
        padding: 6px 6px 12px 6px;
        align-items: stretch;
    }

    .rgb-title {
        display: none !important; /* Hide title to save vertical space */
    }

    #gameWrapper {
        height: 100%;
        max-height: 100%;
    }

    #renderer {
        aspect-ratio: 16/10;
    }

    #statsBar {
        gap: 8px;
        padding: 4px;
        font-size: 0.5rem;
    }

    button {
        font-size: 0.48rem;
        padding: 5px 8px;
    }

    .element-btn {
        font-size: 0.75rem;
        padding: 4px 7px;
    }

    .cat-tab {
        font-size: 0.46rem;
        padding: 4px 6px;
    }

    #controlPanel {
        gap: 4px;
        padding: 4px 0;
    }

    .elements-grid, .presets-grid {
        gap: 3px;
        padding: 4px 0;
    }

    .controls-row-gravity, .controls-row-presets {
        padding: 3px 0;
    }
}