body {
    background-color: #f1f5f9;
    color: #0f172a;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
}

#lobby {
    background: #ffffff;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    text-align: center;
    max-width: 420px;
    border: 1px solid #e2e8f0;
}

h1 {
    margin-top: 0;
    color: #0f172a;
    font-size: 1.8rem;
}

.card {
    background: #f8fafc;
    padding: 1.2rem;
    margin: 1.2rem 0;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
}

.card h3 {
    margin-top: 0;
    font-size: 1.1rem;
    color: #334155;
}

input {
    padding: 0.75rem;
    width: 85%;
    margin-bottom: 0.75rem;
    border-radius: 8px;
    border: 1px solid #cbd5e1;
    background: #ffffff;
    color: #0f172a;
    font-size: 1rem;
    outline: none;
    transition: border 0.2s;
}

input:focus {
    border-color: #0284c7;
}

button {
    background: #0284c7;
    color: white;
    border: none;
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: background 0.2s, transform 0.1s;
}

button:hover { 
    background: #0369a1; 
}

button:active {
    transform: scale(0.98);
}

#canvas {
    background: #ffffff;
    border: 4px solid #cbd5e1;
    border-radius: 16px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.06);
    cursor: none;
}

#controls-info {
    text-align: center;
    margin-top: 12px;
    color: #64748b;
    font-weight: 600;
}