@font-face {
  font-family: "Black Ops One";
  src: url("fonts/black-ops-one.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Lato";
  src: url("fonts/lato-700.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

:root {
  --green: #3b8069;
  --ink: #000;
}

* {
  box-sizing: border-box;
  margin: 0;
}

body {
  display: grid;
  place-items: center;
  min-height: 100dvh;
  background: var(--green);
  color: var(--ink);
}

/* The slide keeps its 16:9 shape and scales to fit the window. Sizes in cqw are
   the PDF's measurements as a percentage of its 720pt page width. */
.slide {
  position: relative;
  width: min(100vw, 100dvh * 16 / 9);
  aspect-ratio: 16 / 9;
  container-type: inline-size;
}

.photos {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.15cqw;
  padding: 6.95cqw 1.15cqw 0;
}

.photos img {
  display: block;
  width: 100%;
  height: auto;
}

.mark {
  position: absolute;
  left: 1.04cqw;
  bottom: 2.05cqw;
  font: 700 1.667cqw/1 "Black Ops One", sans-serif;
  white-space: nowrap;
}

.copyright {
  font-family: "Lato", sans-serif;
}

/* Phones in portrait: a 16:9 slide would be too small, so the photos stack. */
@media (max-width: 700px) and (orientation: portrait) {
  body {
    display: block;
  }

  .slide {
    width: auto;
    aspect-ratio: auto;
    container-type: normal;
    padding: 16px;
  }

  .photos {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 0;
  }

  .mark {
    position: static;
    margin-top: 16px;
    font-size: 16px;
  }
}