.outer {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    margin: 0 auto;
    height: auto;
    padding: 0 8px 24px;
    box-sizing: border-box;
}

.simulation-wrapper {
    width: 100%;
    max-width: 1200px;
}

#canvas-container {
    width: 100%;
    height: 70vh;
    min-height: 400px;
    border: 1px solid var(--canvas-border, #1e293b);
    background: #000;
    position: relative;
}

#canvas-container canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 20px;
    padding: 20px;
    background: var(--controls-bg, #f8f9fa);
    border: 1px solid var(--border-color, #dee2e6);
    border-radius: 8px;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.control-group label {
    min-width: 140px;
    font-weight: 500;
    color: var(--text-color, #212529);
}

.control-group input[type="range"] {
    flex: 1;
    min-width: 200px;
    height: 6px;
    border-radius: 3px;
    background: var(--slider-bg, #dee2e6);
    outline: none;
    -webkit-appearance: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--slider-thumb, #0d6efd);
    cursor: pointer;
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--slider-thumb, #0d6efd);
    cursor: pointer;
    border: none;
}

.control-group span {
    min-width: 60px;
    padding: 4px 12px;
    background: var(--display-bg, #e9ecef);
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9rem;
    color: var(--text-color, #212529);
}

.control-group button {
    padding: 8px 20px;
    border: 1px solid var(--border-color, #ccc);
    background: var(--btn-bg, #0d6efd);
    color: var(--btn-fg, #fff);
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

.control-group button:hover {
    background: var(--btn-hover, #0b5ed7);
    transform: translateY(-1px);
}

.control-group button:active {
    transform: translateY(0);
}

header ul {
    list-style-type: disc;
    margin-left: 20px;
    text-align: left;
}

@media (max-width: 768px) {
    header ul {
        list-style-type: none;
        padding-left: 0;
    }

    header h1 {
        font-size: 2rem;
    }

    header p {
        font-size: 1rem;
    }

    #canvas-container {
        height: 50vh;
        min-height: 300px;
    }

    .control-group {
        flex-direction: column;
        align-items: stretch;
    }

    .control-group label {
        min-width: auto;
    }

    .control-group input[type="range"] {
        min-width: 100%;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }

    header p {
        font-size: 0.9rem;
    }

    .outer {
        max-width: 100%;
    }
}


:root.dark #canvas-container {
    border-color: #475569;
}

:root.dark .controls {
    background: #1e293b;
    border-color: #334155;
}

:root.dark .control-group label,
:root.dark .control-group span {
    color: #e2e8f0;
}

:root.dark .control-group input[type="range"] {
    background: #334155;
}

:root.dark .control-group span {
    background: #0f172a;
}

:root.dark .control-group button {
    background: #3b82f6;
    color: #fff;
    border-color: #2563eb;
}

:root.dark .control-group button:hover {
    background: #2563eb;
}