signal_web/src/App.vue

<template>
    <div id="app">
        <router-view/>
    </div>
</template>

<style>
    #app {
        position: absolute;
        width: 100%;
        height: 100%;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        overflow: hidden;
        display: block;
        margin: 0 auto;
        font-family: Avenir, Helvetica, Arial, sans-serif;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        text-align: center;
        color: #2c3e50;
    }
</style>