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

body {
    font-family: 'Roboto', sans-serif;
    background-color: #222;
    color: #eee;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

header {
    width: 100%;
    max-width: 900px;
    text-align: center;
    margin-bottom: 20px;
}

h1 {
    text-align: center;
    margin-bottom: 5px;
    font-size: 24px;
}

.main-container {
    display: flex;
    flex-direction: column;
    max-width: 900px;
    width: 100%;
}

.game-container {
    width: 100%;
    aspect-ratio: 16/9;
    background-color: #111;
    border: 2px solid #444;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.8);
    position: relative; /* For proper positioning of canvas */
}

.controls-section {
    margin-top: 20px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.control-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    background-color: #2a2a2a;
    padding: 15px;
    border-radius: 6px;
}

.panel-section {
    flex: 1;
    min-width: 200px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.section-title {
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 5px;
    color: #aaa;
    text-transform: uppercase;
}

.material-palette {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 8px;
}

.material-button {
    background-color: #333;
    color: #fff;
    border: none;
    padding: 8px 5px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 12px;
    text-align: center;
    position: relative;
    height: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}

.material-button::before {
    content: '';
    width: 24px;
    height: 24px;
    border-radius: 3px;
    margin: 3px auto;
    display: block;
}

.material-button.active {
    background-color: #555;
    box-shadow: 0 0 5px rgba(255,255,255,0.2);
    transform: scale(1.05);
}

.material-button[data-material="sand"]::before {
    background-color: #e6c88c;
}
.material-button[data-material="water"]::before {
    background-color: #4b8ffc;
}
.material-button[data-material="wall"]::before {
    background-color: #888888;
}
.material-button[data-material="fire"]::before {
    background-color: #ff4a00;
}
.material-button[data-material="oil"]::before {
    background-color: #6b5918;
}
.material-button[data-material="plant"]::before {
    background-color: #3a9e37;
}
.material-button[data-material="acid"]::before {
    background-color: #97fc5c;
}
.material-button[data-material="ice"]::before {
    background-color: #b0f5fc;
}
.material-button[data-material="steam"]::before {
    background-color: #d0d0d0;
}
.material-button[data-material="eraser"]::before {
    background-color: #000;
    border: 1px solid #444;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 8px;
}

.tool-button {
    background-color: #333;
    color: #fff;
    border: none;
    padding: 8px 0;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: 12px;
}

.tool-button.active {
    background-color: #555;
    box-shadow: 0 0 5px rgba(255,255,255,0.2);
}

.preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 8px;
}

.preset-button {
    background-color: #333;
    color: #fff;
    border: none;
    padding: 8px 0;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.preset-button:hover {
    background-color: #444;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.slider-container label {
    width: 80px;
    font-size: 12px;
}

.slider-container input[type="range"] {
    flex: 1;
}

.value-display {
    min-width: 30px;
    text-align: center;
    font-size: 12px;
}

.utility-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

button {
    background-color: #444;
    color: #fff;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #555;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.keyboard-shortcuts {
    background-color: #2a2a2a;
    padding: 10px;
    border-radius: 5px;
    font-size: 12px;
    margin-top: 10px;
}

.keyboard-shortcuts table {
    width: 100%;
    border-collapse: collapse;
}

.keyboard-shortcuts td {
    padding: 3px 8px;
}

.keyboard-shortcuts kbd {
    background: #444;
    border-radius: 3px;
    padding: 2px 5px;
    font-family: monospace;
}