.pd-contenedor {
    width: 100%;
    max-width: 900px;
    height: 550px;
    margin: 20px auto;
    border: 2px solid #333;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
    background: #ffffff;
}

.pd-barra {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px;
    background: #f1f5f9;
    border-bottom: 1px solid #cbd5e1;
    align-items: center;
}

.pd-grupo {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: bold;
}

.pd-lienzo-wrap {
    flex: 1;
    position: relative;
    width: 100%;
    height: 100%;
}

#pizarraCanvas {
    width: 100%;
    height: 100%;
    display: block;
    cursor: crosshair;
    touch-action: none;
}

.pd-btn {
    padding: 6px 14px;
    border: none;
    border-radius: 4px;
    background: #2563eb;
    color: white;
    font-weight: bold;
    cursor: pointer;
}

.pd-btn.active { background: #1d4ed8; }
.pd-btn.pd-borrar { background: #dc2626; }
.pd-btn.pd-guardar { background: #16a34a; }