:root {
    --primary-bg: #1e1e1e;
    --panel-bg: #2d2d2d;
    --text-color: #f0f0f0;
    --accent-color: #4CAF50;
    --accent-hover: #45a049;
    --grid-border: #444;
    --cell-bg: #333;
    --font-heading: 1.25rem;
    --font-body: 1rem;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-color);
    height: 100vh;
    display: flex;
    overflow: hidden;
    font-size: 16px; 
}

#blocklyDiv {
    width: 65%; 
    height: 100%;
    background-color: #fff; 
}

#rightPanel {
    width: 35%;
    height: 100%;
    background-color: var(--panel-bg);
    display: flex;
    flex-direction: column;
    padding: 1.5rem; 
    border-left: 1px solid #444;
    overflow-y: auto;
    box-shadow: -5px 0 15px rgba(0,0,0,0.3);
}

h2 {
    margin-bottom: 1.2rem;
    font-size: 1.4rem;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    text-align: center;
    border-bottom: 2px solid #444;
    padding-bottom: 0.5rem;
}

#gridContainer {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px; 
    width: 100%;
    max-width: 400px; 
    margin: 0 auto 1.5rem auto; 
    aspect-ratio: 1;
    background-color: #222 !important;
    border: 3px solid #555 !important;
    box-shadow: 0 8px 20px rgba(0,0,0,0.6);
    border-radius: 8px;
    padding: 6px;
}

.grid-cell {
    background-color: #2d2d2d;
    border: 2px solid #3d3d3d; 
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem !important; 
    position: relative;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.grid-cell.rover {
    background-color: rgba(76, 175, 80, 0.3) !important;
    box-shadow: inset 0 0 15px rgba(76, 175, 80, 0.6), 0 0 10px rgba(76, 175, 80, 0.4);
    border: 2px solid #4CAF50;
    transform: scale(1.05); 
    z-index: 10;
}
.grid-cell.rover::after { content: none !important; }

.grid-cell.obstacle {
    background-color: #3e3e3e !important;
}
.grid-cell.obstacle::after {
    content: '🪨' !important;
    filter: drop-shadow(2px 4px 4px rgba(0,0,0,0.6));
}

.grid-cell.target-revealed { 
    background-color: rgba(33, 150, 243, 0.3) !important;
    animation: pulse 1.5s infinite;
}
.grid-cell.target-revealed::after { 
    content: '💧' !important;
    filter: drop-shadow(0 0 8px #2196F3);
}

.grid-cell.target-collected {
    background-color: rgba(255, 152, 0, 0.3) !important;
}
.grid-cell.target-collected::after {
    content: '🧪' !important; 
}

.controls {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}

button {
    flex: 1;
    padding: 1rem; 
    border: none;
    border-radius: 6px;
    background-color: var(--accent-color);
    color: white;
    font-weight: bold;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.1s, background 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
}

button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.3);
}

button:active {
    transform: translateY(0);
}

button.secondary { background-color: #555; }
button.secondary:hover { background-color: #666; }

.section-label {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: #bbb;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-left: 4px solid var(--accent-color);
    padding-left: 8px;
}

#codePreview {
    width: 100%;
    min-height: 120px;
    background-color: #1a1a1a;
    color: #e0e0e0;
    padding: 1rem;
    border-radius: 6px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 1rem; 
    line-height: 1.4;
    overflow: auto;
    margin-bottom: 1.5rem;
    border: 1px solid #444;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.5);
}

#outputLog {
    flex: 1;
    min-height: 200px;
    background-color: #1a1a1a;
    color: #00ff00; 
    padding: 1rem;
    border-radius: 6px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 1rem; 
    line-height: 1.5;
    overflow-y: auto;
    border: 1px solid #444;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.5);
}

.log-entry {
    margin-bottom: 8px;
    border-bottom: 1px solid #2a2a2a;
    padding-bottom: 4px;
}
.log-error { color: #ff5252; font-weight: bold; }
.log-success { color: #4CAF50; font-weight: bold; }

@keyframes pulse {
    0% { box-shadow: inset 0 0 0px rgba(33, 150, 243, 0.2); }
    50% { box-shadow: inset 0 0 20px rgba(33, 150, 243, 0.6); }
    100% { box-shadow: inset 0 0 0px rgba(33, 150, 243, 0.2); }
}

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: #222; }
::-webkit-scrollbar-thumb { background: #555; border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: #777; }

.blocklyToolboxDiv, 
.blocklyFlyoutBackground {
    background-color: #f8f9fa !important; 
    color: #000000 !important; 
    border-right: 1px solid #dee2e6;
}

.blocklyToolboxDiv .blocklyTreeLabel, 
.blocklyToolboxCategory .blocklyTreeLabel, 
span.blocklyTreeLabel,
.blocklyToolboxDiv .blocklyTreeRow .blocklyTreeLabel {
    font-family: 'Segoe UI', Roboto, sans-serif !important;
    font-size: 16px !important;
    font-weight: 600 !important;
    color: #000000 !important; 
    text-rendering: optimizeLegibility;
}

.blocklyToolboxDiv .blocklyTreeRow, 
.blocklyToolboxCategory {
    height: 50px !important;
    line-height: 50px !important;
    margin-bottom: 12px !important;
    padding-left: 20px !important;
    
    border-radius: 0 25px 25px 0;
    margin-right: 15px;
    
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    color: #000000 !important; 
    background-color: #f8f9fa !important; 
}

.blocklyToolboxDiv .blocklyTreeRow:not(.blocklyTreeSelected):hover,
.blocklyToolboxCategory:not(.blocklyTreeSelected):hover {
    background-color: #e9ecef !important;
    transform: translateX(4px);
    color: #000000 !important; 
}

.blocklyToolboxDiv .blocklyTreeSelected,
.blocklyToolboxCategory[aria-selected="true"],
.blocklyToolboxDiv .blocklyTreeSelected .blocklyTreeRow,
.blocklyToolboxDiv .blocklyTreeSelected .blocklyTreeLabel,
.blocklyToolboxDiv .blocklyTreeSelected * {  
    background-color: #ffffff !important;
    box-shadow: 2px 2px 8px rgba(0,0,0,0.05) !important;
    border-left: 4px solid #4CAF50 !important;
    color: #000000 !important; 
}

.blocklyTreeIcon,
.blocklyToolboxIcon {
    visibility: visible !important;
    width: 16px !important;
    height: 16px !important;
    border-radius: 50%;
    margin-right: 12px !important;
    background-image: none !important;
}

.blocklyTreeSeparator {
    border-bottom: none !important;
    margin: 10px 0 !important;
}
@media (max-width: 768px) {
    body { flex-direction: column; }
    #blocklyDiv { width: 100%; height: 60%; }
    #rightPanel { width: 100%; height: 40%; padding: 1rem; }
}
.blocklyToolboxCategoryLabel {
    color: #000000 !important;
}