/* Gray Coding vs Binary — 16-QAM Constellation Simulation */
#grayContainer {
    --bg-color: #0d1117;
    --panel-color: #161b22;
    --accent-gray: #3fb950;
    --accent-bin: #f85149;
    --text-color: #c9d1d9;
    --border-color: #30363d;
    max-width: 960px;
    margin: 0 auto;
    font-family: 'Segoe UI', 'Roboto', 'Courier New', monospace;
    background: var(--bg-color);
    color: var(--text-color);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

#grayContainer .gray-controls {
    display: flex;
    flex-wrap: nowrap;
    gap: 24px;
    align-items: center;
    margin-bottom: 20px;
    padding: 15px;
    background: rgba(88, 166, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

#grayContainer .gray-controls-left {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 200px;
}

#grayContainer .gray-snr-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

#grayContainer .gray-controls label {
    color: #bbb;
    font-size: 0.9em;
}

#grayContainer .gray-controls input[type="range"] {
    width: 100%;
    accent-color: #58a6ff;
}

#grayContainer .gray-snr-val {
    font-family: 'Courier New', monospace;
    font-weight: bold;
    color: #58a6ff;
    min-width: 3em;
}

#grayContainer .gray-file-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

#grayContainer .gray-controls input[type="file"] {
    background: #333;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 6px 10px;
    font-size: 0.9em;
    cursor: pointer;
}

#grayContainer .gray-controls input[type="file"]::file-selector-button {
    background: #58a6ff;
    color: #000;
    border: none;
    padding: 4px 10px;
    border-radius: 4px;
    margin-right: 10px;
    cursor: pointer;
    font-weight: bold;
}

#grayContainer .gray-controls-right {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

#grayContainer .gray-original-view {
    display: block;
    border: 2px solid var(--border-color);
    background: #111;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

#grayContainer .gray-columns {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
}

#grayContainer .gray-panel {
    flex: 1;
    min-width: 280px;
    max-width: 400px;
    background: var(--panel-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 15px;
    text-align: center;
}

#grayContainer .gray-panel.gray-coded { border-color: var(--accent-gray); }
#grayContainer .gray-panel.binary-coded { border-color: var(--accent-bin); }

#grayContainer .gray-panel h3 {
    margin: 0 0 12px 0;
    font-size: 1em;
}

#grayContainer .gray-panel.gray-coded h3 { color: var(--accent-gray); }
#grayContainer .gray-panel.binary-coded h3 { color: var(--accent-bin); }

#grayContainer .gray-panel .gray-caption {
    display: block;
    margin-bottom: 6px;
    font-size: 0.85em;
    color: #8b949e;
}

#grayContainer .gray-constellation {
    display: block;
    margin: 0 auto 12px auto;
    border: 2px solid var(--border-color);
    background: #000;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

#grayContainer .gray-image-view {
    display: block;
    margin: 0 auto;
    border: 2px solid var(--border-color);
    background: #111;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

#grayContainer .gray-ber-box {
    margin: 10px auto 6px auto;
    padding: 8px 12px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: #c9d1d9;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    display: inline-block;
}

#grayContainer .gray-panel.gray-coded .gray-ber-box { border-color: var(--accent-gray); }
#grayContainer .gray-panel.binary-coded .gray-ber-box { border-color: var(--accent-bin); }

#grayContainer .gray-hint {
    margin-top: 12px;
    font-size: 0.8em;
    color: #8b949e;
}