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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    overflow: hidden;
    max-width: 1200px;
    width: 100%;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 24px;
    text-align: center;
}

h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.status {
    font-size: 14px;
    opacity: 0.9;
}

.content {
    padding: 24px;
}

.video-container {
    position: relative;
    background: #000;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 24px;
}

#outputCanvas {
    width: 100%;
    height: auto;
    display: block;
    cursor: crosshair;
}

#outputCanvas.drawing {
    cursor: crosshair;
}

#videoInput {
    display: none;
}

.controls {
    text-align: center;
    margin-bottom: 24px;
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}
.camera-select {
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #ddd;
    font-size: 16px;
    min-width: 250px;
    background: white;
    cursor: pointer;
    transition: all 0.2s;
}

.camera-select:hover {
    border-color: #667eea;
    box-shadow: 0 0 0 1px #667eea;
}

.camera-select:focus {
    outline: none;
    border-color: #764ba2;
    box-shadow: 0 0 0 2px rgba(118, 75, 162, 0.3);
}
button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
}

button:hover {
    transform: translateY(-2px);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

button.draw-mode {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

button.grid-mode {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

.hint {
    text-align: center;
    color: #666;
    font-size: 14px;
    margin-bottom: 16px;
    padding: 8px;
    background: #f0f0f0;
    border-radius: 8px;
}
.hint.active {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
    padding: 16px;
    text-align: left;
}

.hint.active strong {
    display: block;
    margin-bottom: 8px;
    font-size: 16px;
}

.hint.active button {
    cursor: pointer;
    transition: all 0.2s;
}

.hint.active button:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
}

.chart-container {
    background: white;
    padding: 20px;
    border-radius: 12px;
    margin-top: 24px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.footer {
    text-align: center;
    padding: 16px;
    color: #666;
    font-size: 14px;
}

@media (max-width: 768px) {
    h1 { font-size: 24px; }
    .stat-value { font-size: 28px; }
    .controls {
        flex-direction: column;
        align-items: center;
    }
}