Cant see arrow on pop up

[SergeySt]

I have template code (from sample) and css(from sample too) defined in style section of component, cant see arrow on popover:
<template> <v-popover offset="16"> <button class="tooltip-target b3">Click me</button> <template slot="popover"> <div class="tooltip-content tooltip-inner popover-inner tooltip-arrow popover-arrow"> <input id="my_id" v-model="msg" placeholder="Tooltip content" /> <p>{{ msg }}</p> </div> </template> </v-popover> </template>

[grreeenn]

you need to add (and then play with) these