@font-face {
    font-family: "Fredoka";
    src: url("./fonts/Fredoka-VariableFont_wdth,wght.woff2") format("woff2");
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

:root {
    font-family: "Fredoka", Arial, sans-serif;
    line-height: 1.6;
    scroll-behavior: smooth;
    --bg: oklch(0.99 0.003 325);
    --primary: oklch(0.25 0.01 325);
    --header-bg: #001845;
    --header-text: #ffffff;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--primary);
}

.container {
    max-width: 80rem;
    margin-inline: auto;
    padding-inline: 1rem;
}

header {
    background: var(--header-bg);
    color: var(--header-text);
}

header nav ul {
    padding: 0;
    margin: 0;
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    margin-inline-start: -2rem;
}

header nav a {
    display: inline-block;
    padding-block: 1rem;
    padding-inline: 2rem;
    text-decoration: none;
    color: inherit;
}

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

.row {
    display: flex;
    gap: 2rem;
}
.row > div {
    border: 1px dashed var(--primary);
    padding: 1rem;
    flex: 1;
}
.row > div:first-child {
    flex: 2;
}
.row > div:last-child {
    flex: 1;
}

.nav-oef {
    margin-block: 2rem;
}

.lab-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: stretch;
}

.lab-nav li:first-child {
    margin-right: auto;
    align-self: flex-start;
}

.lab-nav li:first-child a {
    padding: 0;
    background: none;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.8rem;
}

.lab-nav li:not(:first-child) a {
    display: block;
    padding-block: 1rem;
    padding-inline: 2rem;
    background: #b00000;
    color: #ffffff;
    text-decoration: none;
    font-size: 0.8rem;
    transition: color 200ms ease, background-color 200ms ease;
}

.lab-nav li:not(:first-child) a:hover,
.lab-nav li:not(:first-child) a:focus-visible {
    background: #ffffff;
    color: #b00000;
}

.cards {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.cards > li {
    flex: 1 1 18rem;
    box-shadow: 0 0 .2rem oklch(0 0 0 / .2), 0 0 2rem oklch(0 0 0 / .1);
    border-radius: 0.5rem;
    overflow: hidden;
    background: #ffffff;
    position: relative;
    display: flex;
    flex-direction: column;
}

.cards img {
    width: 100%;
    display: block;
}

.cards .content {
    padding: 1rem;
    position: relative;
}

.cards .content h3 {
    margin-top: 0;
}

.cards .overlay-link {
    position: absolute;
    inset: 0;
    text-indent: -9999px;
}