:root {
    --bg-color: #121212;
    --panel-bg: #1e1e1e;
    --accent-orange: #e67e22;
    --accent-hover: #d35400;
    --text-main: #ffffff;
    --text-dim: #b3b3b3;
    --border-color: #333;
    --status-blue: #3498db;
    --success-green: #2ecc71;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 20px;
    line-height: 1.6;
}

header {
    text-align: center;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

header h1 {
    margin: 0;
    letter-spacing: 2px;
}

.version {
    font-size: 0.5em;
    color: var(--accent-orange);
    vertical-align: middle;
}

.panel {
    background-color: var(--panel-bg);
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

h3 {
    margin-top: 0;
    color: var(--accent-orange);
    text-transform: uppercase;
    font-size: 14px;
    letter-spacing: 1px;
}

.master-btn {
    background-color: var(--accent-orange);
    color: white;
    border: none;
    padding: 16px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    border-radius: 8px;
    width: 100%;
    transition: background 0.3s ease;
}

.master-btn:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

.master-btn:disabled {
    background-color: #444;
    color: #888;
    cursor: not-allowed;
}

.canvas-container {
    margin-top: 20px;
    background: #000;
    border-radius: 8px;
    padding: 10px;
    display: flex;
    justify-content: center;
}

canvas {
    max-width: 100%;
    height: auto;
    border: 1px solid #444;
}

.data-box {
    background-color: #000;
    padding: 20px;
    border-radius: 8px;
    margin-top: 20px;
    font-family: 'Consolas', 'Monaco', monospace;
    color: var(--success-green);
    border-left: 4px solid var(--success-green);
    white-space: pre-wrap;
    font-size: 13px;
    max-height: 500px;
    overflow-y: auto;
}

#progress-indicator {
    color: var(--status-blue);
    font-weight: bold;
    margin-top: 15px;
    text-align: center;
}