@view-transition {
  navigation: auto;
}

:root {
    --main-bg-color: #001144;
    --sub-bg-color: black;
    --main-txt-color: white;
    --sub-txt-color: #001144;
    --highlight-color: rgb(255,255,60);
    --highlight-alt-color: rgb(255,60,60);
    --spacing-smaller: 4px;
    --spacing-small: 8px;
    --spacing-medium: 12px;
    --spacing-large: 24px;
    --spacing-larger: 48px;
    --max-width: 760px;
}

.sr-only {
    clip: rect(1px, 1px, 1px, 1px) !important;
    clip-path : inset(50%) !important;
    position : absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    border: 0 !important;
    overflow : hidden !important;
    white-space : nowrap !important;
}

@keyframes gradient {
    0% {
        background-position: 50% 0%;
    }
    50% {
        background-position: 50% 100%;
    }
    100% {
        background-position: 50% 0%;
    }
}

@keyframes section {
    0% {
        left: -150%;
    }
    100% {
        left: 0;
    }
}

@keyframes section-reverse {
    0% {
        right: -150%;
    }
    100% {
        right: 0;
    }
}

html {
    font: 18px/18px Helvetica, sans-serif;
    color: var(--main-txt-color);
    background-color: var(--main-bg-color);
    background-image: repeating-linear-gradient(45deg, transparent 40%, var(--sub-bg-color) 45%), repeating-linear-gradient(-45deg, transparent 40%, var(--sub-bg-color) 45%);
    background-size: 200vw 200vw;
    /* animation: gradient 240s linear forwards infinite; */
    height: 100%;
}

body {
    background: none;
    min-height: 100vh;
    display: grid;
    grid-template-rows: [header] auto [main] 1fr [footer] auto;
}

html, body, ul, h1, h2, h3, p {
    margin: 0;
    padding: 0;
}

main {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto 32px;
}

a {
    text-decoration: none;
    color: var(--main-txt-color);
}

a:hover,
a:focus {
    opacity: .7;
    transition: opacity 300ms;
}

a p,
p a {
    text-decoration: underline dashed var(--main-txt-color);
    text-decoration-thickness: 1px;
}

.subbg-maintxt {
    background-color: var(--sub-bg-color);
    color: var(--main-txt-color);
}

.mainbg-maintxt {
    background-color: var(--main-bg-color);
    color: var(--main-txt-color);
}

.highlightbg-subtxt {
    background-color: var(--highlight-color);
    color: var(--sub-txt-color);
}

h1 {
    font-size: 32px;
    height: 32px;
    line-height: 32px;
    margin-top: 16px;
    text-shadow: 0 0 2px var(--highlight-color),4px 4px rgba(160,0,0,1);
    text-align: center;
}

br {
    display: block;
}

section {
    position: relative;
    margin: 0 12px 24px;

    @media (prefers-reduced-motion: no-preference) {
        animation: section 300ms ease forwards;
    }
}

.box {
    position: relative;
    padding: 3% 4%;
    margin-bottom: 26px;
    border: 4px solid var(--highlight-color);
    border-radius: 32px;
    background: #171719;
    box-shadow: 4px 4px rgb(170,170,20);
}

.box::before,
.box::after {
    content: '';
    display: block;
    width: calc((100vw - var(--max-width)) / 2);
    height: 42px;
    z-index: 1;
    position: absolute;
}

.box::before {
    top: 30%;
    right: 100%;
    background-image: linear-gradient(to right, rgba(255,255,60,.3) 35%, rgba(255,255,60,1));
}

.box::after {
    top: 50%;
    left: 100%;
    background-image: linear-gradient(to left, rgba(255,255,60,.3) 35%, rgba(255,255,60,1));
}

.box img,
.images {
    display: block;
    margin: 0 auto var(--spacing-small);
    border-radius: 16px;
    border: 3px solid var(--highlight-color);
    box-sizing: border-box;
    max-width: 100%;
    max-height: 80vh;
    width: auto;
}

.box .images {
    display: flex;
    gap: var(--spacing-smaller);
    background: linear-gradient(0deg, var(--highlight-color) 2%, rgba(100,100,0,1) 15%, rgba(100,100,0,1) 85%,  var(--highlight-color) 98%);
}

.box .images img {
    max-width: calc((100% - var(--spacing-smaller)) / 2);
    margin: auto;
    border-radius: 12px;
    border: 0;
    width: 100%;
}

img.full {
    width: 100%;
}

ul {
    list-style: none;
}

ul li {
    padding: 8px 0 16px;
    line-height: 32px;
}

ul li:last-child {
    padding-bottom: 6px;
}

ul li span[role="presentation"] {
    font-weight: 700;
}

p {
    display: inline-block;
    line-height: 1.3;
    margin-top: var(--spacing-smaller);
}

p + p {
    margin-top: var(--spacing-large);
}

br {
    margin-top: var(--spacing-small);
}

.box p + img,
.box p + .images {
    margin-top: var(--spacing-larger);
}

h3 {
    display: inline-block;
    background: var(--highlight-color);
    color: var(--sub-bg-color);
    min-width: 80px;
    padding: 6px 12px;
    border-radius: 6px;
    text-transform: uppercase;
    font-weight: 700;
    font-size: 16px;
    letter-spacing: 1.1px;
    text-align: center;
}

h2 {
    display: inline-block;
    position: relative;
    bottom: -32px;
    background: var(--highlight-color);
    color: var(--sub-bg-color);
    padding: 6px 12px 36px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 16px;
    letter-spacing: 1.1px;
}

hr {
    height: var(--spacing-smaller);
    background:  var(--highlight-color);
    border: 0;
    border-radius: 32px;
    margin: var(--spacing-larger) auto;
    width: 33%;
}

.box li {
    list-style-position: inside;
    line-height: 1.3;
}

.warning {
    background-color: var(--highlight-alt-color);
    color: white;
    padding: 0 var(--spacing-smaller);
}


section:nth-child(odd) {
    @media (prefers-reduced-motion: no-preference) {
        animation: section-reverse 300ms ease forwards;
    }
}

section:nth-child(odd) .box {
    border-color: var(--highlight-alt-color);
    box-shadow: 4px 4px rgb(160,0,0);
}

section:nth-child(odd) .box img,
section:nth-child(odd) .box .images {
    border-color: var(--highlight-alt-color);
}

section:nth-child(odd) .box hr {
    background-color: var(--highlight-alt-color);
}

section:nth-child(odd) .box .images {
    background: linear-gradient(0deg, var(--highlight-alt-color) 2%, rgba(100,0,0,1) 15%, rgba(100,0,0,1) 85%,  var(--highlight-alt-color) 98%);
}

section:nth-child(odd) .box::before {
    background-image: linear-gradient(to right, rgba(200,0,0,.3) 35%, rgba(255,0,0,1));
}

section:nth-child(odd) .box::after {
    background-image: linear-gradient(to left, rgba(200,0,0,.3) 35%, rgba(255,0,0,1));
}

section:nth-child(odd) h3,
section:nth-child(odd) h2 {
    background: var(--highlight-alt-color);
}

footer {
    background: var(--sub-bg-color);
    padding: var(--spacing-small);
    text-align: center;
}