:root {
    --primary-bg: #1a1a1a;
    --secondary-bg: #2a2a2a;
    --text-color: #e0e0e0;
    --accent-color: #007bff;
    --accent-color-hover: #0056b3;
    --reset-color: #dc3545;
    --reset-color-hover: #a71d2a;
    --slider-track: #444;
    --border-color: #333;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-color);
    overflow: hidden; /* Prevents scrollbars from appearing */
}

#c {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
}

.ui-container {
    position: fixed;
    top: 15px;
    right: 15px;
    width: 320px;
    background: rgba(42, 42, 42, 0.85);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    max-height: calc(100vh - 30px);
    overflow-y: auto;
}

/* NEW: Styles for header and reset button */
.ui-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

#reset-btn {
    width: 100%;
    padding: 12px;
    background-color: var(--reset-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease-in-out;
}

#reset-btn:hover {
    background-color: var(--reset-color-hover);
}


.controls-group {
    margin-bottom: 20px;
}

.controls-group h3 {
    margin-top: 0;
    margin-bottom: 15px;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.model-selection {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.model-btn {
    flex-grow: 1;
    padding: 8px 12px;
    background-color: var(--secondary-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
}

.model-btn:hover {
    background-color: #3c3c3c;
}

.model-btn.active {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
    font-weight: 600;
}


.slider-container {
    display: grid;
    grid-template-columns: 60px 1fr 45px;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.slider-container label {
    font-weight: 500;
    white-space: normal; 
}

.slider-container span {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--slider-track);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border-radius: 50%;
    transition: background 0.2s;
}

input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border-radius: 50%;
    border: none;
    transition: background 0.2s;
}

input[type="range"]:hover::-webkit-slider-thumb {
    background: #009bff;
}
input[type="range"]:hover::-moz-range-thumb {
    background: #009bff;
}

#auto-animate-btn {
    width: 100%;
    padding: 12px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease-in-out;
}

#auto-animate-btn:hover {
    background-color: var(--accent-color-hover);
}