How to move mini-graph-card name in the center of the card

Hello,

I created this customized card to monitor the external temperature:

image

using the following code:

type: custom:button-card
thermostat:
  template:
    - base
  show_state: false
  variables:
    thermostat_on: |
      [[[
        return ['yes'].indexOf(entity === undefined || entity.attributes.heating) !==-1;
      ]]]
    entity_id: |
      [[[ return !entity || entity.entity_id; ]]]
custom_fields:
  temp: >
    [[[ return '🌡️'+
    states['sensor.termostato_thermostat_temperatura_esterna'].state +' °C'; ]]]
  graph:
    card:
      type: custom:mini-graph-card
      entities:
        - sensor.termostato_thermostat_temperatura_esterna
      color_thresholds:
        - value: 20.5
          color: "#f39c12"
        - value: 23.5
          color: "#fd3721"
      hours_to_show: 96
      points_per_hour: 0.5
      line_width: 3
      height: 70
      name: Temperatura esterna
      show:
        name: true
        icon: false
        state: false
        label: false
        legend: false
        points: false
        fill: fade
        extrema: true
        average: true
      card_mod:
        style: |
          ha-card {
            font-size: 1.5vw !important;
            background: none !important;
            border: none !important;
          }
          @media (max-width: 1440px) {
            ha-card {
              font-size: 1.2vw !important;
            }
          }
          ha-card[fill] .info {
            padding-bottom: 0 !important;
          }
          info {
            opacity: 1.5 !important;
          }
          .info__item__time {
              display: none !important;
          }
          .graph__labels {
            top: -10% !important;
          }
          @media (max-width: 800px) {
            div.info.flex {
              display: none;
            }
          }
styles:
  grid:
    - grid-template-areas: |
        "temp"
        "graph"
    - grid-template-columns: 1fr
    - grid-template-rows: fit-content(100%) min-content 1fr
    - gap: 0
  card:
    - color: rgba(255, 255, 255, 0.6)
    - background: linear-gradient(to top, rgba(53,59,83,0.8) 0%, rgba(10,14,34,0.8) 100%)
    - overflow: hidden
    - padding: 0.0% 0.0% 0.0% 0.0%
  name:
    - overflow: inherit
  custom_fields:
    temp:
      - font-size: |
          [[[
            if (window.matchMedia('(max-width: 800px)').matches)
              return '1.2em';
            if (window.matchMedia('(max-width: 1500px)').matches)
              return '5vw';
            else return '1.6vw';
          ]]]
      - font-weight: 500
      - letter-spacing: "-1px"
      - color: |
          [[[
            return variables.thermostat_on
                ? '#FF9500'
                : '#3583b6';
          ]]]

But I’m not able to move the name “Temperatura esterna” in the center and change the font size, how could I do this?

Another change I’d like to do is to change the vertical spacing in the extrema and average values, I mean I would like move away slightly in vertical the words “Min”, “Avg” and “Max” from their values. Is this possible?

Here is a proper place to ask.