:root {
  --bg: #008080;
  --face: #d4d0c8;
  --panel: #f4f4f4;
  --light: #ffffff;
  --mid: #808080;
  --dark: #404040;
  --text: #000000;
  --link: #0000aa;
  --visited: #551a8b;
  --title1: #000080;
  --title2: #1084d0;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  min-height: 100%;
}

body {
  margin: 0;
  padding: 12px;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: #008080;
  background-image: url("background.jpg");
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  background-attachment: fixed;
  color: var(--text);
  font-family: Tahoma, "MS Sans Serif", Geneva, sans-serif;
  font-size: 16px;
  line-height: 1.4;
}

.window {
  background: var(--face);
  border-top: 2px solid var(--light);
  border-left: 2px solid var(--light);
  border-right: 2px solid var(--dark);
  border-bottom: 2px solid var(--dark);
  box-shadow: inset -1px -1px 0 var(--mid), inset 1px 1px 0 var(--light);
}

.page {
  width: 100%;
  margin-inline: auto;
  max-width: 125vh;   /* fallback */
  max-width: 125dvh;  /* preferred on modern browsers */
}

.title-bar {
  padding: 6px 8px;
  background: linear-gradient(to right, var(--title1), var(--title2));
  color: #ffffff;
}

.title-bar h1 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.2;
}

.window-body {
  padding: 12px;
  background: var(--face);
}

p {
  margin: 0 0 16px;
  max-width: none;
}

.link-list {
  margin: 0 0 16px;
  padding-left: 24px;
}

.link-list li {
  margin: 0 0 12px;
}

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

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

a:focus-visible,
.skip-link:focus-visible {
  outline: 2px dotted #000000;
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 8px;
  top: -100px;
  z-index: 1000;
  padding: 8px 10px;
  background: #ffffe1;
  color: #000000;
  border: 2px solid #000000;
  text-decoration: none;
}

.skip-link:focus {
  top: 8px;
}

.content-area {
  padding: 18px 20px;
  background: var(--panel);
  border-top: 2px solid var(--mid);
  border-left: 2px solid var(--mid);
  border-right: 2px solid var(--light);
  border-bottom: 2px solid var(--light);
}

.content-area img {
  max-width: 100%; /* Only scales down, never up */
  height: auto;    /* Keeps proportions correct */
  display: block;  /* Prevents extra spacing below images */
  margin: 1em 0;   /* Adds some vertical space between images */
}