:root {
    --bg-color: #0a0a0a;
    --sidebar-bg: rgba(10, 10, 10, 0.6);
    --text-color: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.5);
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --border-color: rgba(255, 255, 255, 0.1);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    margin: 0;
    overflow: hidden;
    background-color: var(--bg-color);
    font-family: var(--font-main);
    color: var(--text-color);
}

/* Canvas stays in background */
canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    outline: none;
    /* Optimization for crisp rendering */
    image-rendering: -webkit-optimize-contrast;
}

/* Progress Bar */
#progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    background-color: var(--accent-color);
    width: 0%;
    z-index: 100;
    transition: width 0.3s ease-out, opacity 0.5s ease;
    box-shadow: 0 0 10px var(--accent-color);
}

/* Sidebar */
#sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background: var(--sidebar-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    z-index: 10;
    display: flex;
    flex-direction: column;
    padding: 0;
    box-sizing: border-box;
    overflow: hidden;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.sidebar-content {
    flex-grow: 1;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.sidebar-content::-webkit-scrollbar {
    width: 4px;
}

.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.sidebar-footer {
    padding: 24px;
    border-top: 1px solid var(--border-color);
    background: rgba(10, 10, 10, 0.8);
    flex-shrink: 0;
}

/* Accordion */
.accordion-item {
    border-bottom: 1px solid var(--border-color);
}

.accordion-header {
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: background 0.2s ease;
}

.accordion-header:hover {
    background: rgba(255, 255, 255, 0.03);
}

.accordion-header h2 {
    margin: 0;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    text-transform: uppercase;
}

.accordion-icon {
    font-size: 8px;
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-body {
    padding: 0 24px 24px 24px;
    display: none;
}

.accordion-item.active .accordion-body {
    display: block;
}

/* Controls */
.btn {
    width: 100%;
    padding: 12px 16px;
    border-radius: 6px;
    font-family: var(--font-main);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    border: none;
    outline: none;
}

.btn.primary {
    background-color: var(--accent-color);
    color: white;
}

.btn.primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn.primary:active {
    transform: translateY(0);
}

.btn.secondary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.btn.secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Color Picker */
.color-picker {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    margin-top: 8px;
}

.color-option {
    aspect-ratio: 1;
    width: 100%;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.color-option::after {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border: 1px solid var(--accent-color);
    border-radius: 50%;
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.2s ease;
}

.color-option:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.5);
}

.color-option:hover::after {
    opacity: 1;
    transform: scale(1);
}

/* Test Background removed */

/* Custom Select */
.select-wrapper {
    position: relative;
    width: 100%;
}

select {
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 12px 16px;
    border-radius: 6px;
    font-family: var(--font-main);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
    outline: none;
}

select:hover {
    border-color: rgba(255, 255, 255, 0.3);
    background-color: rgba(255, 255, 255, 0.08);
}

select:focus {
    border-color: var(--accent-color);
}

select option {
    background-color: #1a1a1a;
    color: white;
}

.select-arrow {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 10px;
    pointer-events: none;
}

/* Range Slider Styling */
input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
    cursor: pointer;
    margin: 0;
}

input[type=range]:focus {
    outline: none;
}

/* Track */
input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    border: none;
}

/* Thumb */
input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: var(--text-color);
    margin-top: -6px; /* center thumb */
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
    border: 2px solid var(--bg-color);
    transition: transform 0.1s ease, background-color 0.2s;
}

input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    background: white;
}

input[type=range]:active::-webkit-slider-thumb {
    background: var(--accent-color);
}

/* Firefox Support */
input[type=range]::-moz-range-track {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    border: none;
}

input[type=range]::-moz-range-thumb {
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: var(--text-color);
    border: 2px solid var(--bg-color);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
    cursor: pointer;
}