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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow: hidden;
    background: #1a1a1a;
    color: #e0e0e0;
}

a {
    color: #e0e0e0;
}

#canvas-container {
    width: 100vw;
    height: 100vh;
    position: relative;
}

canvas {
    display: block;
    cursor: crosshair;
}

#ui-overlay {
    position: absolute;
    top: 20px;
    left: 20px;
    background: #2a2a2a;
    padding: 15px;
    border-radius: 4px;
    border: 1px solid #444;
    min-width: 250px;
}

#ui-overlay h1 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #e0e0e0;
    font-weight: normal;
}

.status {
    margin: 8px 0;
    padding: 6px;
    background: #333;
    border-radius: 2px;
    font-size: 13px;
}

.status-label {
    color: #999;
    font-size: 11px;
    text-transform: uppercase;
}

.status-value {
    color: #fff;
    margin-left: 5px;
}

.controls {
    margin-top: 15px;
}

button {
    background: #444;
    color: #e0e0e0;
    border: 1px solid #555;
    padding: 8px 16px;
    border-radius: 2px;
    cursor: pointer;
    font-size: 13px;
    margin: 3px 3px 3px 0;
}

button:hover {
    background: #555;
}

button:active {
    background: #333;
}

button:disabled {
    background: #333;
    color: #666;
    cursor: not-allowed;
    border-color: #444;
}

#info-panel {
    position: absolute;
    bottom: 20px;
    left: 20px;
    background: #2a2a2a;
    padding: 15px;
    border-radius: 4px;
    border: 1px solid #444;
    max-width: 350px;
    font-size: 12px;
    line-height: 1.5;
}

#info-panel h3 {
    color: #e0e0e0;
    margin-bottom: 10px;
    font-size: 14px;
    font-weight: normal;
}

#info-panel p {
    margin-bottom: 8px;
    color: #bbb;
}

.progress-bar {
    width: 100%;
    height: 3px;
    background: #333;
    border-radius: 1px;
    overflow: hidden;
    margin-top: 10px;
}

.progress-fill {
    height: 100%;
    background: #666;
    width: 0%;
    transition: width 0.3s ease;
}

.instruction {
    background: #333;
    border-left: 2px solid #666;
    padding: 8px;
    margin: 10px 0;
    border-radius: 2px;
    font-size: 12px;
    color: #bbb;
}