* {
  box-sizing: border-box;
  touch-action: manipulation; /* disables zooming on double-tap */
}

body {
  background-color: #2a2a2a;
  color: whitesmoke; /* text color */
  font-family: sans-serif;
  margin: 0;
  min-height: 100vh; /* pushes footer down if needed */
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-rows   : auto 1fr auto;
  grid-template-areas: "hd hd hd" "lt cn rt" "ft ft ft";
  gap: 3px;
  padding-bottom: 30px; /* empty space at bottom of page */
  user-select: none;
  -webkit-user-select: none; /* no text selection on Safari */
}

/* HEADER */

.header {
  grid-area: hd;
  display: flex;
  justify-content: center; /* center horizontally */
}

/* CENTER */

.center {
  grid-area: cn;
  margin-bottom: auto;
}

.collapsible {
  background-color: darkgray;
  color: black;
  padding: 18px;
  width: 100%;
  border: none;
  text-align: left;
  font-size: 20px;
}

.collapsible:after {
  content: '+';
  font-size: 13px;
  color: white;
  float: right;
  margin-left: 5px;
}

.active:after {
  content: '-';
}

/* SELECTION */

#selection {
  display: none; /* hidden by default */
  flex-direction: column;
}

#presets {
  display: flex;
  align-items: center; /* center vertically */
  select {
    border-radius: 80px;
    width: 150px;
    height: 50px;
    font-size: 20px;
    margin-top: 10px;
    margin-bottom: 10px;
  }
}

#f-presets {
  margin-left: 5px;
}

#m-presets { /* right-aligned */
  margin-left: auto;
  margin-right: 5px;
  direction: rtl;
}

#names {
  display: flex;
  ul {
    font-size: 30px;
    margin-top: 0;
    margin-bottom: 0;
    li {
      margin-bottom: 10px; /* spacing between items */
      color: rgb(0, 200, 0);
    }
  }
}

#m-list { /* right-aligned */
  margin-left: auto;
  margin-right: 0;
  direction: rtl;
}

/* SETTINGS */

#settings {
  display: none; /* hidden by default */
  grid-template-rows: 1fr auto;
}

.settings-option {
  display: flex;
  margin-top: 20px;
  margin-left: 30px;
  font-size: 20px;
  select {
    margin-left: 10px;
    border-radius: 80px;
    width: 180px;
    height: 25px;
    font-size: 15px;
  }
  button {
    color: black;
    border: 1px solid black;
    border-radius: 80px;
    font-size: 15px;
    width: 90px;
    height: 25px;
  }
}

#group-size {
  width: 45px;
}

#avoid-repeats, #additional-sampling {
  width: 65px;
}

#dice {
  width: 105px;
}

#modifier {
  width: 90px;
}

/* RESULTS */

#results {
  border-style: none none solid none;
  display: grid;
  grid-template-rows: 1fr auto;
  margin-top: 20px;
  margin-bottom: 20px;
}

.file-input {
  display: flex;
  flex-direction: column;
  align-items: center; /* center vertically */
  justify-content: center; /* center horizontally */
  text-align-last: center;
  margin-bottom: 20px;
}

.group-title {
  display: flex;
  border-style: solid none solid none;
  font-size: 30px;
  font-weight: 700;
  height: 60px;
  align-items: center; /* center vertically */
}

.group-list {
  list-style-type: none; /* no bullets */
  font-size: 25px;
  margin-top: 10px;
  margin-bottom: 0;
  li {
    margin-bottom: 10px; /* spacing between items */
  }
}

.m {
  color: lightblue;
}

.f {
  color: pink;
}

.dice-item {
  font-size: 15px;
  color: darkgray;
  margin-bottom: 10px;
  margin-left: 15px;
}

/* FOOTER */

.footer {
  grid-area: ft;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: center; /* center vertically */
  height: 10vh;
}

.footer-button {
  display: flex;
  justify-content: center; /* center horizontally */
}

#reset-button, #complete-button {
  border: none;
  background-color: transparent;
  font-size: 30px;
  color: lightgray;
  height: 50px;
}

#main-button {
  border: 1px solid black;
  padding: 10px 20px;
  font-size: 20px;
  color: black;
  border-radius: 80px;
  width: 150px;
  height: 50px;
}