Vencord custom CSS: 4 years in the making from my very original BetterDiscord MinimalCord theme tweak.

custom.css

@import url("https://milbits.github.io/oldcord/src/main.css");
@import url("https://marda33.github.io/SkeuoCord/updates/SkeuoCordBase.css");
/*@import url("https://davart154.github.io/Themes/Icon Revert 2023/2023 Icon Revert.css");*/
@import url("https://raw.githubusercontent.com/xenrelle/Xens-BD-Dump/main/plugins/NoSuperReactions/NoSuperReactions.theme.css");

:root {
	/* OldCord Settings: */
	--reaction-animation: 0;
	/* SkeuoCord Settings: 999px for round borders */
	--maskradius: 999px !important; /*default: 2px*/
	--avatarradius: 999px !important; /*default: 3px*/
	--smallavatarradius: 999px !important; /*default: 2px*/
	--medavatarradius: 999px !important; /*default: 4px*/
	--largeavatarradius: 999px !important; /*default: 5px*/
}

/* Removes (respectively):
 * - Now Playing column
 * - Inbox
 * - Search box in Friends tab
 */
.nowPlayingColumn_c2739c, div[aria-label="Inbox"], .searchBar_e0840f {
    display: none;
}

/*plead 🥺*/
[src*="f3f159b921f71864327c.svg"] { content: url("https://milbits.github.io/oldcord/src/assets/oldPlead.svg"); }
/*holding back 🥹*/
[src*="f2e5d8cf525a4550e1b1.svg"] { content: url("https://milbits.github.io/oldcord/src/assets/oldHoldingBack.svg"); }

/* Hide Nitro Upsell
 * AUTHOR: Vendicated, msm8917, D3SOX
 */
[class^=channel_] > div > [href="/store"], [class^=channel_] > div > [href="/shop"], [class^=channelTextArea] [class^=buttons_] > button, [class^=upsellVisible_], [class^=premiumIconWrapper], [class^=characterCount_] [class*=upsell_], [class^=emojiSection_] [class*=shinyButton_], [class*=tryItOutSection_], [class^=premiumIcon], [class^=customizationSection_] + [class^=upsellContainer_], [class^=customizationSection_][class*=disabled_], [class*=bannerNitroUpsell_], [class^=imageUploaderHint_], [class^=imagePickerContainer_] > [class^=optionBox_]:nth-child(2) { display: none !important; }
[class^=premiumTab], #user-settings-cog-Discord_Nitro, #user-settings-cog-Billing, [class^=subscribeAction], [class^=upsellBanner], [class^=userPopoutInner] > [class^=wrapper] > [class^=banner], [class^=userPopoutInner] > [class^=containerWrapper], [class*=premiumFeatureBannerBackground], [class*=premiumFeatureBorder], [class^=userPanelInner] > [class*=inSidebar], [class^=tierCtaContainer], [class^=tierCtaContainer] + [class^=shelf], a[href*="/snowsgiving"], [class^=customizationSection] > [class^=limitedFeatureBorder], [class^=upsellOverlayContainer_], [class*=sansAttachButton] > [class^=buttons] > [class^=container], [id^=popout] [class*=contentPremium], [class^=birthdayFeatureBorder], [class^=sidebar] > [class^=container] > [class^=wrapper] > [class^=container] > [class^=content], [class^=themeEditor], [class*=cozyMessage] > [class*=buttonContainer] > [class*=buttons] > [class*=wrapper] > [aria-label*="Add Super Reaction"], [id^=popout] [class*=colorPremiumGradient], #message [class*=colorPremiumGradient], [class^=burstReactionTooltipPrompt], [aria-label="Add Super Reaction"], [class^=side_] > [class^=header_] + [class^=premiumTab] + [class^=item_] + [class^=item_] + [class^=item_] + [class^=item_], #emoji-picker-tab-panel > [class*=emojiPickerHeader]:first-child > [class^=tooltipContainer]:nth-child(2) { display: none !important; }
[class^=emojiSection] > div > div > div > a { color: inherit; pointer-events: none; }
[class^=reactionInner][aria-label*="burst react"] { pointer-events: none; }
[class^=userPopoutInner] > [class^=containerWrapper] { top: 0 !important; }