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

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

.container {
    max-width: 800px;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    padding: 30px;
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 25px;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

#canvas-container {
    text-align: center;
    margin: 20px 0;
}

canvas {
    display: inline-block;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border: 5px solid white;
}

.instructions {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 15px;
    margin-top: 25px;
    border-left: 5px solid #667eea;
}

.instructions h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.4em;
}

.instructions ul {
    list-style-type: none;
    margin-left: 10px;
}

.instructions li {
    margin: 12px 0;
    padding-left: 25px;
    position: relative;
    color: #555;
}

.instructions li:before {
    content: "👉";
    position: absolute;
    left: 0;
}

.note {
    margin-top: 20px;
    padding: 15px;
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 8px;
    color: #856404;
    font-size: 0.9em;
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    h1 {
        font-size: 1.8em;
    }
}