Plume/assets/themes/default/_forms.scss

label {
  display: block;
  margin: 2em auto .5em;
  font-size: 1.2em;
}
input, textarea, select {
  transition: all 0.1s ease-in;
  display: block;
  width: 100%;
  margin: auto;
  padding: 1em;
  box-sizing: border-box;
  -webkit-appearance: textarea;

  background: $form-input-background;
  color: $text-color;
  border: solid $form-input-border thin;

  font-size: 1.2em;
  font-weight: 400;

  &:focus {
    border-color: $primary;
  }
}
form input[type="submit"] {
 margin: 2em auto;
 -webkit-appearance: none;
}

textarea {
  resize: vertical;
  overflow-y: scroll;
  font-family: $lora;
  font-size: 1.1em;
  line-height: 1.5;
}

input[type="checkbox"] {
  display: inline;
  margin: initial;
  min-width: initial;
  width: initial;
  -webkit-appearance: checkbox;
}

/* Inline forms (containing only CSRF token and a <submit>, for protected links) */

form.inline {
  display: inline;
  margin: 0px;
  padding: 0px;
  width: auto;

  input[type="submit"] {
    display: inline-block;
    cursor: pointer;
    font-size: 1em;
    width: auto;
    -webkit-appearance: none;

    &:not(.button) {
      margin: 0;
      padding: 0;
      border: none;
      background: transparent;
      color: $primary;
      font-weight: normal;
    }
  }
}

.button, .button:visited, input[type="submit"], input[type="submit"].button {
  transition: all 0.1s ease-in;
  display: inline-block;
  -webkit-appearance: none;

  margin: 0.5em auto;
  padding: 0.75em 1em;

  background: $primary;
  color: $primary-text-color;
  font-weight: bold;
  border: none;

  cursor: pointer;

  &:hover {
    background: transparentize($primary, 0.1);
  }

  &.destructive {
    background: $red;

    &:hover {
      background: transparentize($red, 0.1);
    }
  }

  &.secondary {
    background: $gray;
    color: $text-color;

    &:hover {
      background: transparentize($text-color, 0.9);
    }
  }
}
input[type="submit"] {
 display: block;
 -webkit-appearance: none;
}

/*  The writing page */
form.new-post {
  max-width: 60em;
  .title {
    margin: 0 auto;
    padding: 0.75em 0;

    background: none;
    border: none;

    font-family: $playfair;
    font-size: 2em;
    text-align: left;
  }
  textarea {
    min-height: 20em;
    overflow-y: scroll;
    resize: none;
   -webkit-appearance: textarea;
  }
}

.button + .button {
  margin-left: 1em;
  margin-inline-start: 1em;
}

.split {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;

  & > * {
    flex-grow: 1;
    max-width: 40%;
  }
}

header.center {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: transparent;
  opacity: 1;
  font-weight: normal;
  text-align: left;

  > * {
    margin-left: 0;
    margin-right: 0;
  }
}

form > header {
  display: flex;

  input[type="submit"] {
    margin-left: 1em;
  }
}