:root {
  color-scheme: light dark;

  --color-blue-light: #c8e5f5;
  --color-gold-light: #ecd399;
  --color-blue-dark: #02293e;
  --color-gold-dark: #715511;

  --color-bg: light-dark(var(--color-blue-light), var(--color-blue-dark));
  --color-text: light-dark(var(--color-blue-dark), var(--color-blue-light));
  --color-accent: light-dark(var(--color-gold-dark), var(--color-gold-light));
}

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

body {
  color: var(--color-text);
  background-color: var(--color-bg);
  font-family: sans-serif;
}

main {
  width: 65%;
  margin: 0 auto 2rem;
}

@media (max-width: 650px) {
  main {
    width: 92%;
  }
}

img {
  display: block;
}

h1 {
  margin: 3rem auto 1rem;
  text-align: center;
  font-size: 2.2rem;
}

h2, h3 {
  margin: 3rem auto .5rem;
  color: var(--color-accent);
  border-bottom: solid;
}

h2 {
  font-size: 1.8rem;
}

h3 {
  font-size: 1.35rem;
  text-align: right;
}

@media (max-width: 650px) {
  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.2rem;
  }
}

p {
  margin: 0 auto 1.5rem;
  line-height: 1.5rem;
}

@media (max-width: 650px) {
  p {
    font-size: .9rem;
    line-height: 1.3rem;
  }
}

a {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-style: solid;
  text-decoration-thickness: .2rem;
  text-decoration-color: var(--color-accent);
  transition: text-decoration-thickness .5s;
  padding: 0 .15rem;
  border-radius: .15rem;
}

@media (any-hover: hover) {
  a:hover {
    text-decoration-thickness: .4rem;
  }
}

a:focus-visible {
  text-decoration: none;
  outline: var(--color-accent) solid .15rem;
}

ul {
  margin: 0 auto 1.5rem 2rem;
  line-height: 1.5rem;
}

@media (max-width: 650px) {
  ul {
    font-size: .9rem;
    line-height: 1.3rem;
  }
}

time {
  font-weight: 700;
}

nav ul {
  display: flex;
  gap: 1rem;
  list-style: none;
  justify-content: center;
  margin: 1rem auto;
}

nav a {
  font-size: 1.4rem;
  border: 1px solid;
  border-radius: .15rem;
  padding: .15rem .3rem;
  color: var(--color-accent);
  text-decoration: none;
}

@media (max-width: 650px) {
  nav a {
    font-size: 1.1rem;
  }
}

@media (any-hover: hover) {
  nav a:hover {
    color: var(--color-bg);
    background-color: var(--color-accent);
  }
}

nav a:focus-visible {
  outline: none;
  color: var(--color-bg);
  background-color: var(--color-accent);
}

header img {
  max-height: 25vh;
  max-width: 100%;
  margin: 0 auto;
}

@media (max-width: 650px) {
  header img {
    max-height: 20vh;
  }
}

@media (prefers-color-scheme: light) {
  #logo-dark {
    display: none;
  }
}

@media (prefers-color-scheme: dark) {
  #logo-light {
    display: none;
  }
}

#author {
  text-align: right;
  margin-bottom: 3rem;
  font-style: italic;
}

footer {
  color: var(--color-bg);
  background-color: var(--color-text);
  padding: 1rem;
}

footer p {
  text-align: center;
  margin: 0;
}

footer a {
  color: var(--color-bg);
  text-decoration-color: var(--color-bg);
}

footer a:focus-visible {
  outline-color: var(--color-bg);
}