:root {
  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  min-height: 100vh;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

#app {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
  text-align: center;
}

.input {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.5em;
}
input {
  padding: 0.3em 0.5em;
  font-size: 1.1em;
  width: 6em;
  background-color: transparent;
  transition: border-color 0.25s;
}
button, .button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #1a1a1a;
  cursor: pointer;
  transition: border-color 0.25s;
  text-decoration: none;
  color: inherit;
}
button:hover, .button:hover {
  border-color: #646cff;
}
button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

#light {
  width: 2.5em;
  height: 2.5em;
  border-radius: 50%;
  background-color: #1a1a1a;
  margin-left: .75em;
}
#light.is-valid {
  background-color: #46fd46;
}
#light.is-invalid {
  background-color: #fd3838;
}

#automaton-selector {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}
#automaton-collection {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin: 2em 0;
}

.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5em;
  margin: 1em;
  border-radius: 8px;
  background-color: #1a1a1a;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1), 0 2px 4px rgba(0, 0, 0, 0.2);
  cursor: pointer;
}
.card:hover {
  background-color: #2a2a2a;
}

graph-editor {
  display: block;
  height: 600px;
}

.link {
  stroke: orange;
  stroke-width: 4px;
  fill: none;
}
.link.draggable {
  stroke: orangered;
  stroke-dasharray: 8px 2px;
  pointer-events: none;
}
.link.hidden {
  stroke-width: 0;
}

.arrow {
  fill: orange;
}
.arrow.draggable {
  fill: orangered;
}

.node {
  fill: #007aff;
  stroke: none;
  cursor: pointer;
}
.node.active {
  fill: green;
}
.start-arrow {
  fill: #007aff;
  stroke: none;
}
.node.accepting {
  outline: 5px solid #007aff;
  outline-offset: 4px;
  border-radius: 50%;
}

.clickbox {
  stroke: rgba(0, 0, 0, 0);
  stroke-width: 16px;
  fill: none;
  cursor: pointer;
}

.context-menu {
  position: absolute;
  background: #313131;
  border: 1px solid #222;
  box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
  min-width: 150px;
}

.context-menu ul {
  padding: 0;
  margin: 0;
  cursor: pointer;
  list-style-type: none;
}

.context-menu li {
  padding: 4px 8px;
}

.context-menu li:hover, .context-menu li:focus {
  background-color: #2a2a2a;
}
.context-menu li:active {
  background-color: #1a1a1a;
}
.context-menu .checked:after {
  content: "✓";
  float: right;
}

table {
  width: 100%;
}
th, td {
  border-bottom: thin solid hsla(0, 0%, 100%, .12);
  height: 48px;
  padding: 0 16px;
}

.modal[hidden] {
  display: none;
}

.modal {
  position: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, .8);
  animation: fadeIn .3s both
}

.modal-content {
  overflow: auto;
  width: 600px;
  max-width: calc(100vw - 20px);
  max-height: calc(100vh - 20px);
  padding: 20px;
  background-color: #1a1a1a;
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #ffffff;
  }
  button, .btn {
    background-color: #f9f9f9;
  }
  .context-menu {
    background: white;
    border: 1px solid #ccc;
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
  }
  .context-menu li:hover, .context-menu li:focus {
    background-color: #f0f0f0;
  }
  .context-menu li:active {
    background-color: #e0e0e0;
  }
}