del {color:red !important; font-weight:bold}
ins {color:lime !important;font-weight:bold}

:root {
	/* --nc-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol"; */
	--nc-font-sans: 'IBM Plex Mono', Consolas, monaco, 'Ubuntu Mono', 'Liberation Mono', 'Courier New', Courier, monospace;
	--nc-font-mono: 'IBM Plex Mono', Consolas, monaco, 'Ubuntu Mono', 'Liberation Mono', 'Courier New', Courier, monospace;

	/* Light theme - old bg: 1d2021 */
	--nc-tx-1: #ffffff;
	--nc-tx-2: #cccccc;
	--nc-bg-1: #1e1e1e;
	--nc-bg-2: #2e2e2e;
	--nc-bg-3: #484544;
	--nc-lk-1: #3291FF;
	--nc-lk-2: #0070F3;
	--nc-lk-tx: #FFFFFF;
	--nc-ac-1: #7928CA;
	--nc-ac-tx: #FFFFFF;

	/* Dark theme */
	--nc-d-tx-1: #ffffff;
	--nc-d-tx-2: #cccccc;
	--nc-d-bg-1: #1e1e1e;
	--nc-d-bg-2: #282828;
	--nc-d-bg-3: #32302f;
	--nc-d-lk-1: #3291FF;
	--nc-d-lk-2: #0070F3;
	--nc-d-lk-tx: #FFFFFF;
	--nc-d-ac-1: #7928CA;
	--nc-d-ac-tx: #FFFFFF;
}

a {
	text-decoration: none;
}

a:hover {
	text-decoration: underline;
}

body {
	max-width: 820px;
	font-size: 1rem;
}

form :valid{border: 2px solid green}
form :invalid{border:2px solid red}

/* cyrillic-ext */
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(https://fonts.gstatic.com/s/ibmplexmono/v6/-F63fjptAgt5VM-kVkqdyU8n1iIq129k.woff2) format('woff2');
  unicode-range: U+0460-052F, U+1C80-1C88, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
/* cyrillic */
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(https://fonts.gstatic.com/s/ibmplexmono/v6/-F63fjptAgt5VM-kVkqdyU8n1isq129k.woff2) format('woff2');
  unicode-range: U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* vietnamese */
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(https://fonts.gstatic.com/s/ibmplexmono/v6/-F63fjptAgt5VM-kVkqdyU8n1iAq129k.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(https://fonts.gstatic.com/s/ibmplexmono/v6/-F63fjptAgt5VM-kVkqdyU8n1iEq129k.woff2) format('woff2');
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(https://fonts.gstatic.com/s/ibmplexmono/v6/-F63fjptAgt5VM-kVkqdyU8n1i8q1w.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

footer{
  /* chose this color merely because it is quite suitable in the footer */
  border-top:1px solid #696969;
  padding-top: .6rem;
  margin-top: 2rem;
  font-size: .8rem;
  color: var(--nc-d-tx-2);
  text-align: center;
}