:root {
  --def-size: 1rem;
  --col-gutter: 2rem;
  --elem-gutter: 0.5rem;
  --time: 4s;
  color-scheme: light dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --text-color: #454545;
    --bg-color: #f3f3f3;
    --url-color: #0072A3;
    --url-visited: #0079AD;
    --bg-button: #fafafa;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --text-color: #F8FBFA;
    --bg-color: #454545;
    --url-color: #e9e914;
    --url-visited: #b5b546;
    --bg-button: #121212;
  }
}

/*@font-face {
    font-family: "MyArial";
    /*src: url("Arimo-VariableFont_wght.ttf") format("TrueType");
    font-weight: 125 950;
    font-stretch: 75% 125%;
    font-style: normal;
    font-display: swap;
}*/

body {
    font: var(--def-size) Helvetica, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    text-rendering: optimizeSpeed;
    scroll-behavior: smooth;
    /* min-height: 100vh; */
    overflow-x: hidden;
}

header > * {
    display: inline-block;
}

main {
    display: grid;
    grid-auto-flow: row;
    grid-template-columns: 1fr 1fr 1fr 1fr;
}

a {
    color: var(--url-color);
}

a:visited {
    color: var(--url-visited);
}

.fototeca-old {
    border: 1px solid #ccc;
    margin: 1rem;
}

.backbutton {
    margin: 2rem;
    border-radius: 45px;
    display: inline-block;
    padding: 1.5rem;
    background: var(--bg-button);
    font-family: Helvetica, sans-serif;
    font-size: calc(1.2 * var(--def-size) );
    border: 0;
    cursor: pointer;
}

.tb-image {
    max-width: 100%;
    max-height: 400px;
}

figcaption {
    text-align: center;
}

@media screen and (max-width:768px) {
    * {
        font-size: 1rem;
    }
    main {
      grid-template-columns: 1fr 1fr;
    }

    .backbutton {
        margin: 1rem;
        padding: 1rem;
        font-size: 1rem;
    }

    header {
        position: fixed;
        bottom: 0;
        left: 0;
        z-index: 1;
        /* display: flex;
        justify-content: center; */
        background-color: var(--bg-color);
        width: 100%;
    }

    .fototeca-old {
        overflow: hidden;
    }

    ul {
        padding: 0
    }
    ul li {
        word-break: break-all;
        list-style-type: none;
    }