:root {
    --green: #7fbf7f;
    --green-bright: #90ee90;
    --border: #4d8b4d;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: #000;
    overflow: hidden;
    font-family: "Source Code Pro", ui-monospace, monospace;
    color: var(--green);
}

#gpu {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    display: block;
    touch-action: none;
}

#panel {
    position: fixed;
    top: 18px;
    left: 18px;
    z-index: 10;
    width: 230px;
    padding: 16px 16px 14px;
    background: rgba(5, 12, 5, 0.82);
    border: 1px solid var(--border);
    box-shadow: 0 0 18px rgba(127, 191, 127, 0.12);
    backdrop-filter: blur(4px);
    user-select: none;
}

.title {
    color: var(--green-bright);
    letter-spacing: 3px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 14px;
    text-shadow: 0 0 6px rgba(127, 191, 127, 0.4);
}

.row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin: 10px 0;
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.row label { opacity: 0.85; }

select, button {
    font-family: inherit;
    font-size: 12px;
    color: var(--green);
    background: rgba(10, 20, 10, 0.85);
    border: 1px solid var(--border);
    padding: 5px 10px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.2s ease;
}

select:hover, button:hover {
    background: var(--border);
    color: #000;
}

.buttons { justify-content: flex-start; gap: 8px; }
.buttons button { flex: 1; }

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 110px;
    height: 3px;
    background: var(--border);
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: var(--green-bright);
    border: none;
    box-shadow: 0 0 6px rgba(144, 238, 144, 0.6);
    cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--green-bright);
    border: none;
    box-shadow: 0 0 6px rgba(144, 238, 144, 0.6);
    cursor: pointer;
}

.hint {
    margin-top: 14px;
    font-size: 10.5px;
    line-height: 1.5;
    opacity: 0.6;
    letter-spacing: 0.5px;
}

.stats {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid rgba(77, 139, 77, 0.5);
    font-size: 11px;
    letter-spacing: 1px;
    color: var(--green-bright);
}

#unsupported {
    position: fixed;
    inset: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    padding: 20px;
}

#unsupported[hidden] { display: none; }

#unsupported .box {
    max-width: 480px;
    border: 1px solid var(--border);
    padding: 30px;
    background: rgba(10, 20, 10, 0.8);
    box-shadow: 0 0 20px rgba(127, 191, 127, 0.12);
}

#unsupported h1 {
    color: var(--green-bright);
    font-size: 1.4em;
    letter-spacing: 2px;
    margin-top: 0;
}

#unsupported p { line-height: 1.6; font-size: 14px; }
#unsupported code { color: var(--green-bright); }

@media (max-width: 600px) {
    #panel { width: 180px; padding: 12px; }
    input[type="range"] { width: 80px; }
}