:root {
  --bg-color: #fdfdfd;
  --primary-color: #1a1a1a;
  --disabled-color: #a0a0a0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #1a1a1a;
    --primary-color: #fdfdfd;
  }
}
html {
  line-height: 1.5;
  font-family: Georgia, serif;
  font-size: 20px;
  color: var(--primary-color);
  background-color: var(--bg-color);
}
body {
  margin: 0 auto;
  max-width: 36em;
  padding-left: 50px;
  padding-right: 50px;
  padding-top: 50px;
  padding-bottom: 50px;
  hyphens: auto;
  overflow-wrap: break-word;
  text-rendering: optimizeLegibility;
  font-kerning: normal;
}
@media (max-width: 600px) {
  body {
    font-size: 0.9em;
    padding: 1em;
  }
  h1 {
    font-size: 3em;
  }
}
@media print {
  body {
    background-color: transparent;
    color: black;
    font-size: 12pt;
  }
  p {
    orphans: 3;
    widows: 3;
  }
}
p {
}
a {
  color: var(--primary-color);
}
a:visited {
  color: var(--primary-color);
}
header {
  text-align: center;
}

::backdrop {
  background: var(--bg-color);
  opacity: 0.85;
}

div.box {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  margin: 0 0.5em;
}
div.vbox {
  display: flex;
  flex-direction: column;
  align-items: center;
}
div.cabins {
  width: 405px;
}

button {
  border-width: 3px;
  border-radius: 5px;
  border-style: solid;
  line-height: 1.5;
  font-family: Georgia, serif;
  font-size: 20px;
  color: var(--primary-color);
  border-color: var(--primary-color);
  background-color: var(--bg-color);
}
@media (hover: hover) {
  button:hover {
    background-color: var(--primary-color);
    color: var(--bg-color);
  }
}

div.suit-box {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  margin: 10px 0;
}
button.suit-btn {
  border-width: 0;
  font-size: 40px;
  width: 75px;
  margin: 0 5px;
}

button.stack {
  width: 75px;
  height: 105px;
  margin: 5px;
}
button.stack.sideways {
  width: 105px;
  height: 75px;
  margin: 21px 5px 16px;
}

div.full-triangle {
  width: 18px;
  aspect-ratio: 1/cos(30deg);
  clip-path: polygon(50% 0,100% 100%,0 100%);
  background-color: var(--primary-color);
}
div.empty-triangle {
  --b: 3px; /* border thickness */
  width: 18px;
  aspect-ratio: 1/cos(30deg);
  clip-path: polygon(50% 0,100% 100%,0 100%,50% 0,50% var(--b),
    calc(var(--b)*cos(30deg)) calc(100% - var(--b)/2),
    calc(100% - var(--b)*cos(30deg)) calc(100% - var(--b)/2),50% var(--b));
  background-color: var(--primary-color);
}

dialog {
  border-width: 3px;
  border-radius: 5px;
  border-style: solid;
  color: var(--primary-color);
  border-color: var(--primary-color);
  background-color: var(--bg-color);
}
.title-row {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
}
.title-row form {
  margin-left: 1em;
}
.title-row button {
  font-family: monospace;
  width: 2em;
  height: 2em;
}
.suit-peek-panel {
  display: flex;
  flex-direction: row;
}
.suit-peek-panel ol {
  list-style-type: none;
  padding-left: 0;
  text-align: center;
}
.suit-column {
  margin: 0 1em;
}
li.off-suit {
  color: grey;
}

div.invisible {
  visibility: hidden;
}