:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --accent-primary: #00d4ff;
    --accent-secondary: #00ff88;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.simulation-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    width: 100%;
    max-width: 1400px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.main-panel {
    flex: 3;
    display: flex;
    flex-direction: column;
    gap: 15px;
    min-width: 600px;
}

#simulationCanvas {
    width: 100%;
    height: auto;
    aspect-ratio: 2 / 1;
    background-color: #000;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
}

.chart-container {
    background-color: var(--bg-primary);
    padding: 15px;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
}

.particle-counter {
    text-align: center;
    margin-top: 10px;
    color: var(--text-secondary);
    font-family: 'Menlo', 'Consolas', monospace;
}

.control-panel {
    flex: 1;
    background-color: var(--bg-primary);
    border-radius: 10px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 25px;
    min-width: 300px;
    border: 1px solid var(--glass-border);
}

.control-group {
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 20px;
}
.control-group:last-child {
    border-bottom: none;
}
.control-group h3 {
    margin-bottom: 15px;
    color: var(--accent-primary);
    font-weight: 500;
}
.control-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

button {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--glass-border);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s ease;
}
button:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}
button.active {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
    font-weight: bold;
}

.actions button {
    font-size: 1.1rem;
    font-weight: bold;
}
.actions #btnRun {
    background-color: var(--accent-secondary);
    color: var(--bg-primary);
}
.actions #btnRun:hover {
    background-color: #fff;
}


.slider {
    -webkit-appearance: none;
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 5px;
    outline: none;
}
.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.switch-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--bg-tertiary);
    transition: .4s;
    border-radius: 28px;
}
.switch-slider:before {
    position: absolute;
    content: "";
    height: 20px; width: 20px;
    left: 4px; bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}
input:checked + .switch-slider {
    background-color: var(--accent-secondary);
}
input:checked + .switch-slider:before {
    transform: translateX(22px);
}
.switch-label {
    display: inline-block;
    vertical-align: middle;
    margin-right: 10px;
}