:root {
    --bg-deep: #030307;
    --card-bg: rgba(20, 22, 30, 0.65);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-border-hover: rgba(0, 240, 255, 0.4);
    --primary-accent: #00f0ff;
    --secondary-accent: #7000ff;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-blur: blur(20px);
    --neon-glow: 0 8px 32px rgba(0, 240, 255, 0.25);
}

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

body {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    font-family: 'Lato', sans-serif;
    background-color: var(--bg-deep);
    color: var(--text-main);
    display: flex;
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

#ui-panel {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 10;
    width: 340px;
    max-height: calc(100vh - 40px);
    overflow-y: auto;
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.8), var(--neon-glow);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

#ui-panel::-webkit-scrollbar { width: 6px; }
#ui-panel::-webkit-scrollbar-track { background: transparent; }
#ui-panel::-webkit-scrollbar-thumb {
    background-color: var(--card-border);
    border-radius: 10px;
}

h1 {
    font-family: 'Exo 2', sans-serif;
    font-size: 1.8rem;
    font-weight: 800;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: linear-gradient(135deg, #ffffff 0%, var(--primary-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
    margin-bottom: 5px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

label {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary-accent);
}

select, input[type="range"], input[type="number"] {
    width: 100%;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--card-border);
    color: #fff;
    padding: 10px;
    border-radius: 8px;
    font-family: inherit;
    outline: none;
    transition: all 0.3s ease;
}

select:focus, input[type="number"]:focus {
    border-color: var(--primary-accent);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

input[type="range"] {
    -webkit-appearance: none;
    height: 6px;
    padding: 0;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--secondary-accent), var(--primary-accent));
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.8);
}

.colors-container {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

input[type="color"] {
    -webkit-appearance: none;
    border: none;
    width: 100%;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    background: transparent;
}

input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch {
    border: 1px solid var(--card-border);
    border-radius: 8px;
}

.actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 5px;
}

.btn {
    background: linear-gradient(45deg, rgba(0, 240, 255, 0.1), rgba(112, 0, 255, 0.1));
    border: 1px solid var(--primary-accent);
    color: #ffffff;
    padding: 12px;
    font-family: 'Exo 2', sans-serif;
    text-transform: uppercase;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: 12px;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(45deg, var(--primary-accent), var(--secondary-accent));
    z-index: -1;
    transition: opacity 0.3s ease;
    opacity: 0;
}

.btn:hover::before { opacity: 1; }
.btn:hover {
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
    border-color: transparent;
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 5px;
}

.progress-bar-bg {
    width: 100%;
    height: 8px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--card-border);
    margin-top: 4px;
}

#progressBar {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--secondary-accent), var(--primary-accent));
    box-shadow: 0 0 10px var(--primary-accent);
    transition: width 0.1s ease;
}