html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p,
blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em,
img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u,
i, center, hr, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table,
caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details,
embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby,
section, summary, time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  font: inherit;
  vertical-align: baseline;
}
article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section {
  display: block;
}
ol, ul {
  list-style: none;
}
blockquote, q {
  quotes: none;
}
blockquote::before, blockquote::after, q::before, q::after {
  content: '';
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
img {
  max-width: 100%;
  border-style: none;
}
:disabled {
  cursor: not-allowed;
}
* {
  box-sizing: border-box;
}
*::before, *::after {
  box-sizing: inherit;
}
body {
  background: transparent;
  font-family: "Helvetica Neue",
  Arial,
  "Hiragino Kaku Gothic ProN",
  "Hiragino Sans",
  Meiryo,
  sans-serif;
  font-size: 16px;
  line-height: 1.75;
}
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
}
button {
  border: none;
  padding: 0;
  background: none;
  color: inherit;
  font: inherit;
  appearance: none;
  box-shadow: 0 2px 8px 0 rgba(24, 74, 70, 0.2);
  text-shadow: 0 2px 8px 0 rgba(24, 74, 70, 0.2);
}

button:active {
  box-shadow: none;
  text-shadow: none;
  transform: translateY(1px);
}

:root {
  --header-bg-color: #b0dab0;
  --header-color: #111;
  --main-bg-color: #fff;
  --main-color: #111;
}

a:visited {
  color: darkviolet;
}

a {
  color: darkblue;
}

@media (prefers-color-scheme: dark) {
  :root {
    --header-bg-color: #353;
    --header-color: #e3ffe5;
    --main-bg-color: #222;
    --main-color: #fff;
  }

  a:visited {
    color: coral;
  }

  a {
    color: cyan;
  }
}