@font-face {
  font-family: 'roboto';
  src: url('roboto.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'roboto';
  src: url('roboto-italic.ttf') format('truetype');
  font-weight: normal;
  font-style: italic;
  font-display: swap;
}

/* Page layout */
:root{
    --light-blue: #ddddff;
    --light-blue-transparent: rgba(225,225,255,0.9);
    --mid-blue: #5797dc;
    --dark-blue: #000077;
    --dark-purple: #770077; 
    --grey: #666666;
    --light-grey: #efefef;
    --light-yellow: #ffffcc;
    --dark-red: #770000;
    --dark-green: #007700;
}
.box-sizing * {
    box-sizing: border-box;    
}

body,
html {
    margin: 0;
    padding: 0;
    font-size: 15px; 
    font-family: 'roboto', sans-serif;
    line-height: 1.4;
}

body {
    display: flex;
    justify-content: space-between;
}

#nav,
#main {
    height: 100%;
    border: none;
}

#nav {
    width: 200px;
    border-right: 0.25rem solid var(--dark-green);
    height: 100vh;
    position: sticky;
    top: 0;
    font-size: 0.8rem;
}

#nav ul {
    list-style: none;
    margin-left: 0;
    padding-left: 0;
}

#nav ul li {
    margin-bottom: 0.25rem;
}

#nav ul li a,
#nav ul li a:link,
#nav ul li a:visited {
    color: var(--dark-green);
    display: block;
    padding: 0.25rem 0.25rem;
    position: relative;
    text-decoration: none;
}
#nav ul li a:hover,
#nav ul li a.active,
#nav ul li a:link.active {
    background-color: var(--dark-green);
    color: white;
}
#nav ul li a::before,
#nav ul li a::after {
    background-color: var(--dark-green);
    content: " ";
    position: absolute;
    right: 0;
    height: 0.75rem;
    width: 0.25rem;
    display: none;
}
#nav ul li a:hover::before,
#nav ul li a:hover::after,
#nav ul li a.active::before,
#nav ul li a.active::after {
    display: block;
}
#nav ul li a::before {
    bottom: 100%;
    border-top-left-radius: 100%;
}
#nav ul li a::after {
    top: 100%;
    border-bottom-left-radius: 100%;
}

#main {
    width: 100%;
    padding: 1rem 1rem 3rem;
}

#main h1 {
    margin-top: 0.15rem;
}

#main li,
#main p {
    max-width: 60rem;
}
#main .page p {
    max-width: none;
}

.visually-hidden {
   position: absolute;
   left: -1000rem;
   top: -1000rem;
}

.disclaimer {
    background-color: var(--light-yellow);
    border: dashed 1px red;
    font-style: italic;
    padding: 1rem;
    margin: 0 0 1rem;
    text-align: center;
    max-width: 30rem;
    font-size: 1.1rem;
}
.disclaimer > *:first-child {
    margin-top: 0;
}
.disclaimer > *:last-child {
    margin-bottom: 0;
}

.dos-donts strong {
    color: var(--dark-red);
}

.dos-donts em {
    color: var(--dark-green);
    font-weight: bold;
}

.screen {
    border: dashed 0.125rem var(--dark-red);
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    aspect-ratio: 16 / 9;
    box-shadow: 0 0 65px rgba(0, 0, 0, 0.75);
}

.screen::after {
    content: "16:9 SCREEN VIEW";
    font-size: 0.85rem;
    color: var(--dark-red);
    position: absolute;
    right: 0;
    bottom: 0;
    font-style: italic;
    background-color: white;
    padding: 3px;
}
.align-left {
    margin: 0 1rem 0.5rem 0;
    float: left;
    max-width: 50%;
}
.align-right {
    margin: 0 0 0.5rem 1rem;
    float: right;
    max-width: 50%;
}

/* Headings */
h2 {
    background-color: var(--dark-green);
    color: white;
    padding: 0.125rem 0.5rem;
    border-bottom-right-radius: 5rem;
    margin-top: 3rem;
    position: relative;
}
h2::before, h2::after {
    content: " ";
    position: absolute;
    background-color: var(--dark-green);
}
h2::before {
    right: calc(100% + 0.25rem);
    width: 0.75rem;
    top: 0;
    height: calc(100% + 0.5rem);
}
h2::after {
    top: calc(100% + 0.25rem);
    left: 0;
    width: 50%;
    height: 0.25rem;
    border-bottom-right-radius: 0.25rem;
}
h3,h4 {
    display: flex;
    align-items: center;
}
h3::before, h4::before {
    font-size: 2rem;
    margin-right: 0.5rem;
}
h3.original, h4.original {

}
h3.original::before, h4.original::before {
    content: "\1F5CE";      
}
h3.demo, h4.demo {
    
}
h3.demo::before, h4.demo::before {
    content: "\26A0";
    color: var(--dark-red);    
}
h3.correct, h4.correct {

}
h3.correct::before, h4.correct::before {
    content: "\2713";
    color: var(--dark-green);
}

/* General example */
.container {
    background-color: var(--light-grey);
    padding: 1rem;
}

.example {
    background-color: var(--light-blue);
    width: 600px;
    --scale: 1;
    overflow: hidden;
}

.example header,
.example footer {
    background-color: var(--dark-blue);
    color: white;
    padding: 0.25rem;
    text-align: center;
    font-size: 1rem;
}

.example header {
    font-weight: bold;
    font-size: 1.25rem;
}

/* General width bar */
.width-bar {
    border-top: dotted 1px red;
    border-right: solid 1px red;
    height: 1rem;
    width: 600px;
    margin: 0.5rem 0;
    font-size: 0.75rem;
    font-style: italic;
}

/* General 50/50 panel */
.panel {
    display: flex;
    width: 100%;
    align-items: center;
}

.panel>* {
    width: 50%;
    padding: 1rem;
}

.panel img {
    object-fit: contain;
    display: block;
}

/* General static-left panel */
.example-static-left .panel>div {
    width: 100%;
    padding: 1rem;
}

.example-static-left .panel>img {
    width: 300px;
    object-fit: contain;
}

/* General static-right panel */
/* .example-float-left .panel {
    grid-template-columns: 1fr 300px;
    grid-gap: 1rem;
    display: grid;
}
.example-static-right .panel > div {
    width: auto;
    padding: 0;
}
.example-static-right .panel > img {
    width: auto;
    object-fit: contain;
} */

/* Background-position example */
.example-image-bg .panel {
    height: 375px;
    position: relative;
    background-image: url(../assets/images/page-20-example-1.webp);
    background-size: auto 100%;
}

.example-image-bg .panel .text {
    position: absolute;
    left: 136px;
    top: 72px;
    right: auto;
    width: 261px;
    font-size: 1.75rem;
    color: white;
    border: dotted 1px rgba(255, 255, 255, 0.5);
}

#page-20-example-3 .text {
    left: 22.66%;
    top: 18%;
    width: 43.5%;
    font-size: 1.75rem;
    color: white;
}

.example-image-bg .panel.cover {
    background-size: cover;
}

.example-image-bg .panel.contain {
    background-size: contain;
}

#page-20-example-4.panel {
    background-image: url(../assets/images/page-20-example-1b.webp);
    background-size: contain;
    height: auto;
    aspect-ratio: 600 / 375;
}

/* Contrast example */
.example-contrast-bg .panel {
    height: 375px;
    position: relative;
    background-size: cover;
    background-position: center center;
}

.example-contrast-bg .text {
    left: 22.66%;
    top: 18%;
    width: 52.5%;
    font-size: 2.25rem;
    color: black;
    border: dotted 1px rgba(128, 128, 128, 0.5);
}

.example-contrast-bg #page-30-example-2,
.example-contrast-bg #page-30-example-3 {
    justify-content: flex-start;
    align-items: center;
}

.example-contrast-bg #page-30-example-2 .text,
.example-contrast-bg #page-30-example-3 .text {
    text-align: left;
    width: calc(100% - 6rem);
    position: static;
    border: none;
    /*dotted 1px rgba(255,0,0,1);*/
    color: white;
    font-size: 2rem;
    text-transform: uppercase;
    margin-left: 2rem;
}

.example-contrast-bg #page-30-example-3 .text {
    background-color: rgba(0, 0, 0, 0.75);
    border: none;
    border-radius: 1rem;
    margin-top: 1rem;
}

/* Proportionality */
.example-prop {
    position: relative;

}

.example-prop .page {
    font-size: 0.75rem;
    font-family: Arial, Helvetica, sans-serif;
}

.example-prop .banner-wrapper {
    background-color: var(--mid-blue);
}

.example-prop .banner {
    background-image: url(images/page-40-example-1.webp);
    color: white;
    background-color: var(--mid-blue);
    aspect-ratio: 200 / 58;
    background-repeat: no-repeat;
    background-position: left center;
    background-size: 100% auto;
    text-align: left;
    padding: 1rem;
    font-size: 2.0rem;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.example-prop .banner>div {
    padding-left: 32%;
}

.example-prop .icons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1rem;
}

.example-prop .icons .icon {
    display: flex;
    border-radius: 100%;
    align-items: center;
    justify-content: center;
    background-color: var(--dark-blue);
    color: white;
    aspect-ratio: 1 / 1;
    width: 100%;
    font-size: 1rem;
    font-weight: bold;

}

.example-prop .text {
    padding: 1rem;
    font-size: 1rem;
}

.example-prop .max-width,
.example-prop .max-width,
.example-prop .max-width {
    max-width: 600px;
    margin: auto;
    position: relative;
}

.example-prop.uniform {
    container-type: inline-size;
}

.example-prop.uniform .banner {
    padding: 3cqi;
    font-size: 7.5cqi;
}

.example-prop.uniform .text {
    font-size: 3cqi;
    padding: 3cqi;
}

.example-prop.uniform .icons {
    gap: 3cqi;
    padding: 3cqi;
}

.example-prop.uniform .icons .icon {
    font-size: 3cqi;
}

.example.uniform header,
.example.uniform footer {
    padding: 1cqi;
    font-size: 3cqi;
}

.example.uniform header {
    font-size: 4cqi;
}

/* Primes and columns */
.example-primes {
    position: relative;

}

.example-primes .page {
    font-size: 0.75rem;
    font-family: Arial, Helvetica, sans-serif;
}

.example-primes .icons {
    display: grid;
    align-items: center;
    justify-content: center;
    grid-gap: 1rem;
    padding: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(75px, 1fr))
}

.example-primes .icons .icon {
    display: flex;
    border-radius: 100%;
    align-items: center;
    justify-content: center;
    background-color: var(--dark-blue);
    color: white;
    aspect-ratio: 1 / 1;
    width: 100%;
    font-size: 1rem;
    font-weight: bold;
}

.example-primes .icons-2 {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    padding: 1rem;
}

.example-primes .icons-2 .icon {
    flex: 0 1 300px;
    max-width: 175px;

    border-radius: 5%;
    background-color: var(--dark-purple);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    aspect-ratio: 1 / 1;
    font-size: 1rem;
    font-weight: bold;
}

.example-primes .icons-3 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 1rem;
    padding: 1rem;
}

.example-primes .icons-3 .icon {
    border-radius: 5%;
    background-color: var(--dark-purple);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    aspect-ratio: 1 / 1;
    font-size: 1rem;
    font-weight: bold;
}

.example-primes .icons-3.icons-3-b {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
}

.example-primes .icons-3.icons-3-c {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
}

/* Perfect columns */
.example-perfect {
    position: relative;

}

.example-perfect .page {
    font-size: 0.55rem;
    font-family: Arial, Helvetica, sans-serif;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: 0.5rem;
    padding: 0.5rem;
}

.example-perfect .grid-panel {
    padding: 0.5rem;
}

.example-perfect .page .grid-panel img {
    display: block;
    width: 100%;
    height: auto;
}

.example-perfect .grid-panel__label {
    font-weight: bold;
    margin: 0 0 0.25rem;
    font-size: 1.25em;
    text-transform: uppercase;
    color: white;
    background-color: var(--dark-blue);
    padding: 0.25rem;
}

.example-perfect .grid-panel__desc {
    font-size: 1.3em;
}

.example-perfect .grid-panel__link {
    text-align: left;
    margin-top: 0.25rem;
}

.example-perfect .grid-panel__link-btn {
    background-color: var(--dark-blue);
    color: white;
    border-radius: 0.15rem;
    padding: 0.15rem 0.25rem;
    display: inline-block;
}

.example-perfect.backgrounds .grid-panel {
    background-color: white;
    padding-bottom: 1.75rem;
    position: relative;
}

.example-perfect.backgrounds .grid-panel .grid-panel__link {
    bottom: 0.5rem;
    right: 0.5rem;
    position: absolute;
}

/* Sticky headers/footers */
.example-sticky {
    overflow-y: scroll;
    overflow-x: hidden;
    aspect-ratio: 16 / 9;

    font-size: 0.8rem;
}

.example-sticky .header {
    top: 0;
    position: sticky;
    font-size: 1.05rem;
    box-shadow: 0 0 1.2rem rgba(0,0,0,0.75);
}
.example-sticky .header__logo {
    display: flex;
    justify-content: space-between;
    margin: 0.5rem 1rem;
}
.example-sticky .header__nav-prim {
    font-size: 1rem;
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin: 1.0rem 0;
}
.example-sticky .header__nav-prim > div {
    background-color: white;
    color: #333366;
    padding: 0.25rem 0.5rem;
    display: inline-block;
    border-radius: 0.15rem;
}

.example-sticky .header__nav-prim > div.has-dropdown {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    position: relative;
}
.example-sticky .header__nav-prim__item__dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    width: 23rem;
    background-color: var(--light-blue);
    color: black;
    box-shadow: 0 1rem 1.2rem rgba(0,0,0,0.5);
}
.example-sticky .header__nav-prim__item__dropdown ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
}
.example-sticky .header__nav-prim__item__dropdown ul li {
    padding: 1rem 1rem;
    text-decoration: underline;
}
.example-sticky .header__nav-prim__item__dropdown ul li+li {
    border-top: solid 1px white;
}

.example-sticky .header__nav-secondary {
    font-size: 0.8rem;
    display: flex;
    gap: 0.5rem;
    justify-content: space-evenly;
    font-weight: normal;
    text-decoration: underline;
}
.example-sticky .banner-wrapper {
    background-color: var(--mid-blue);
}

.example-sticky .banner {
    background-image: url(images/page-40-example-1.webp);
    color: white;
    background-color: var(--mid-blue);
    aspect-ratio: 200 / 85;
    background-repeat: no-repeat;
    background-position: left center;
    background-size: 100% auto;
    text-align: left;
    padding: 1rem;
    font-size: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.example-sticky .banner>div {
    padding-left: 32%;
}

.example-sticky .icons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1rem;
}

.example-sticky .icons .icon {
    display: flex;
    border-radius: 100%;
    align-items: center;
    justify-content: center;
    background-color: var(--dark-blue);
    color: white;
    aspect-ratio: 1 / 1;
    width: 100%;
    font-size: 1rem;
    font-weight: bold;

}

.example-sticky .content {
    padding: 1rem;
    font-size: 1.25rem;
}

.example-sticky .footer {
    bottom: 0;
    position: sticky;
    font-size: 1.00rem;
}

.example-sticky .footer__nav {
    font-size: 1.1rem;
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin: 0.5rem 0;
}
.example-sticky .footer__nav span {
    padding: 0.25rem 0.5rem;
    display: inline-block;
    border-radius: 0.15rem;
    text-decoration: underline;
}

/* Compression */
.example-compression {
    overflow: hidden;
}
.example-compression .header {
    font-size: 1.05rem;
    box-shadow: 0 0 1.2rem rgba(0,0,0,0.75);
}
.example-compression .header__logo {
    display: flex;
    justify-content: space-between;
    margin: 0.5rem 1rem;
    align-items: center;
}
.example-compression .header__logo__name {
    display: flex;
    align-items: center;
    align-content: center;
    gap: 0.5rem;
}
.example-compression .header__logo__name::before {
    content: "L";
    background-color: var(--mid-blue);
    border-radius: 100%;
    color: white;
    width: 2.5rem;
    height: 2.5rem;
    display: grid;
    justify-content: center;
    align-content: center;
}
.example-compression .header__nav-prim {
    font-size: 1rem;
    display: flex;
    gap: 0.4rem;
    justify-content: center;
    margin: 1.0rem 0;
    flex-flow: wrap;
}
.example-compression .header__nav-prim__item {
    background-color: white;
    color: #333366;
    padding: 0.35rem 0.85rem;
    display: inline-block;
    border-radius: 0.15rem;
    position: relative;
}
.example-compression .header__nav-prim__item.has-dropdown {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}
.example-compression .header__nav-prim__item__dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--light-blue);
    color: black;
    box-shadow: 0 1rem 1.2rem rgba(0,0,0,0.5);
}
.example-compression .header__nav-prim__item__dropdown ul {
    list-style: none;
    margin: 0;
    padding: 0;
}
.example-compression .header__nav-prim__item__dropdown ul li {
    padding: 0.5rem 1rem;
    text-decoration: underline;
}
.example-compression .header__nav-prim__item__dropdown ul li+li {
    border-top: solid 1px white;
}
.example-compression .header__nav-secondary__search {
    display: flex;
    gap: 1re0m;
    align-items: center;
}
.example-compression .header__nav-secondary__search {
    background-color: white;
}
.example-compression .header__nav-secondary__search > input {
    background-color: transparent;
    border: none;
}
.example-compression .header__nav-secondary__search > button {
    border: none;    
}
.example-compression .header__nav-secondary {
    font-size: 0.8rem;
    display: flex;
    gap: 1rem;
    justify-content: space-evenly;
    font-weight: normal;
    text-decoration: underline;
    align-items: center;
}
.example-compression .page {
    padding: 0 1rem;
}

/* Grid system */
.example-grid {
    --gap: 1rem;
    width: 800px;
}
.example-grid .page {
    position: relative;
    padding: 0 var(--gap);
    background-color: white;
    border-right: solid 1px black;
    font-size: 0.8rem;
}
.example-grid .page__pseudo-grid {
    position: absolute;
    z-index: 0;
    inset: var(--gap); /* respects page padding */
    display: flex;

    margin-left: calc(var(--gap) * -1);
    margin-right: calc(var(--gap) * -1);
    top: calc(var(--gap) * -1);
    bottom: calc(var(--gap) * -1);
}
.example-grid .page__pseudo-grid div {
    flex: 1;
    /* padding: var(--gap); */
    box-sizing: border-box;
}
.example-grid .page__example-grid {
    position: relative;
    z-index: 1;
    padding: var(--gap) 0;
}
.example-grid .page__pseudo-grid div::before {
    content: "";
    display: block;
    height: 100%;
    background-color: black;
    width: 1px;
}
.page__example-grid .row {
    display: flex;
    flex-wrap: wrap;    
    margin-left: calc(var(--gap) * -1);
    margin-right: calc(var(--gap) * -1);
}
.page__example-grid .row + .row {
    margin-top: 1rem;
}
.page__example-grid [class^="col-"] {
  box-sizing: border-box;
  padding: var(--gap); /* gutter */
  background-color: var(--light-blue-transparent);
  border: solid 1px var(--dark-green);
  padding: var(--gap);
  min-width: 0;
}
.page__example-grid .col-1 { flex: 0 0 8.3333%; }
.page__example-grid .col-2 { flex: 0 0 16.6667%; }
.page__example-grid .col-3 { flex: 0 0 25%; }
.page__example-grid .col-4 { flex: 0 0 33.3333%; }
.page__example-grid .col-5 { flex: 0 0 41.6667%; }
.page__example-grid .col-6 { flex: 0 0 50%; }
.page__example-grid .col-7 { flex: 0 0 58.3333%; }
.page__example-grid .col-8 { flex: 0 0 66.6667%; }
.page__example-grid .col-9 { flex: 0 0 75%; }
.page__example-grid .col-10 { flex: 0 0 83.3333%; }
.page__example-grid .col-11 { flex: 0 0 91.6667%; }
.page__example-grid .col-12 { flex: 0 0 100%; }

/* Some example sub-grids */
.example-grid .grid-panel {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
    grid-gap: 1rem;
    min-width: 0;
}
.example-grid .flex-panel {
    display: flex;
    min-width: 0;
    gap: 0.25rem;
    flex-wrap: wrap;
}
.example-grid .flex-panel > * {
    display: block; 
    flex: 1 1 75px;
    min-width: 50px;
    max-width: 125px;
}
.example-grid .grid-panel > * { 
    display: block; 
    width: 100%;
    height: auto;
    min-width: 0;
}