img {
  max-width: 100%;
  height: auto;
}
article{
  font-size: 120%;
  width: 40em;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
}

p {
  font-size: 1em;
}

:root {
  --bg-color: #ffffff;
  --text-color: #000000;
  --link-color: #0000ff;
  --visited-color: #5000bf;
  --active-color: #000080;
}

[data-theme="dark"] {
  --bg-color: #000000;
  --text-color: #ffffff;
  --link-color: #00bbff;
  --visited-color: #b580ff;
  --active-color: #80ddff;
}


@media (prefers-color-scheme: light) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --bg-color: #ffffff;
    --text-color: #000000;
    --link-color: #0000ff;
    --visited-color: #5000bf;
    --active-color: #000080;
  }
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --bg-color: #000000;
    --text-color: #ffffff;
    --link-color: #00bbff;
    --visited-color: #b580ff;
    --active-color: #80ddff;
  }
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
  padding-bottom: 3rem;
}

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

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

a:hover {
  text-decoration: underline;
}

a:active {
  color: var(--active-color);
  text-decoration: underline;
}

/* Base (mobile): stack vertically */
.media-block {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin: 0 auto;
}

.media-block img {
  max-width: 320px;
  height: auto;
  display: block;
}

/* Wide screens: place items side-by-side */
@media (min-width: 800px) {
  .media-block {
    flex-direction: row;
    align-items: flex-start;
  }
  .media-block img {
    width: 320px;
    flex: 0 0 auto;
  }
  .media-block .text {
    flex: 1;
  }
}