Hello,
I have set quite a steep radius of my Lovelace cards so the progress bar extends beyond the edge.

Can you add an option to reduce the width/thickness of the progress bar?
Hello, are you using card-mod or any other tools to style create the border radius?
The card is using the default --ha-card-border-radius theme variable to handle the border-radius.
Simply setting border-radius manually on the card won't work since we need to style the border-radius on multiple places (done through the ha-card-border-radius variable).

ha-card-border-radius: "18px"
is mentioned in my theme yaml and is shown on all cards including your graph card, so its really weird it won't show here.
Hmm okay, I'll update HA later tonight and see if something broke.
Would you mind sending me your card config where you have the issue?
This is present in any config, e.g.
entity: media_player.bedroom_tv
hide:
power: true
progress: true
idle_view:
when_idle: true
when_standby: true
type: 'custom:mini-media-player'
My theme is a modified version of JuanMTech's Google Dark Theme.
Are you sure that's the right config? You're hiding the progress?
Anyway, I'm not able to reproduce on the latest version of the card + latest HA.

Sorry, my bad:
artwork: cover
entity: media_player.spotify
hide:
power: true
idle_view:
when_idle: true
when_standby: true
info: scroll
type: 'custom:mini-media-player'

I'm on the latest version of the card and HA too. This has always been an issue since I installed the card ~3 months back.
Which theme is that? The font and the second line look different.
It looks like this issue is affecting Safari/WebKit as the issue is not reproducible in Chrome/Chromium, but isn't a caching issue as its reproducible in Incognito Safari.
Are you sure that the graph card and the media player card have the same code for the radius?
Yep, you're right, I can see it in Safari too, will look into it.
I remember I fixed this a while back, might have been in mini-graph-card? Was caused by a weird bug in webkit back then.
Time for a new release??
Yes, in the coming days.
Can you tell me which option in the theme controls the color of the progress bar? Also can you share your theme?
mini-media-player-accent-color, falls back to accent-color
https://github.com/kalkih/mini-media-player/blob/06424f033d30ddf9a8bae655e07bb6b71c80ce22/src/style.js#L10
https://github.com/kalkih/mini-media-player/blob/06424f033d30ddf9a8bae655e07bb6b71c80ce22/src/components/progress.js#L162
It's a modified version of another theme (Soft UI or something?), don't remember the original, sorry 馃槖 , but here it is 馃槂
Soft - Dark:
### Main Interface Colors ###
primary-color: "#2F7EFD"
light-primary-color: "#6FA6FE"
primary-background-color: "#1F1F28"
secondary-background-color: var(--primary-background-color)
divider-color: "#2F2F3D"
### Text ###
primary-text-color: "#FFFFFF"
secondary-text-color: "#6FA6FE"
text-primary-color: "#FFFFFF"
disabled-text-color: "#4E4E66"
### Sidebar Menu ###
sidebar-background-color: var(--primary-background-color)
sidebar-icon-color: "#B6B6C1"
sidebar-text-color: "#F1F1F1"
sidebar-selected-background-color: var(--primary-background-color)
sidebar-selected-icon-color: "#6FA6FE"
sidebar-selected-text-color: var(--sidebar-selected-icon-color)
### States and Badges ###
state-icon-color: "#2F7EFD"
state-icon-active-color: "#FBCD41"
state-icon-unavailable-color: var(--disabled-text-color)
### Sliders ###
paper-slider-knob-color: "#2F7EFD"
paper-slider-knob-start-color: var(--paper-slider-knob-color)
paper-slider-pin-color: var(--paper-slider-knob-color)
paper-slider-active-color: var(--paper-slider-knob-color)
paper-slider-secondary-color: var(--light-primary-color)
### Labels ###
label-badge-background-color: "#23232E"
label-badge-text-color: "#F1F1F1"
label-badge-red: "#6FA6FE"
### Cards ###
paper-card-background-color: var(--primary-background-color)
card-background-color: var(--primary-background-color)
ha-background-color: var(--primary-background-color)
paper-listbox-background-color: var(--primary-background-color)
### Toggles ###
paper-toggle-button-checked-button-color: "#2F7EFD"
paper-toggle-button-checked-bar-color: "#6FA6FE"
paper-toggle-button-unchecked-button-color: var(--paper-toggle-button-checked-button-color)
paper-toggle-button-unchecked-bar-color: "#3E4756"
### Table row ###
table-row-background-color: var(--primary-background-color)
table-row-alternative-background-color: var(--secondary-background-color)
### Custom
paper-font-body1_-_font-weight: 500
paper-font-display1_-_font-weight: 500
paper-font-display2_-_font-weight: 500
paper-font-display3_-_font-weight: 500
mini-media-player-accent-color: var(--primary-color)
mini-media-player-name-font-weight: 500
# mini-media-player-button-color: red
# mini-media-player-progress-height: 4px
ha-card-border-radius: 12px
ha-card-box-shadow: none
ha-card-background: transparent
ch-background: var(--primary-background-color)
bc-font-size-heading: 2em
bc-font-size-entity-value: 1.2em
bc-spacing: 6px