excalidraw/src/styles.scss

/* http://www.eaglefonts.com/fg-virgil-ttf-131249.htm */
@font-face {
  font-family: "Virgil";
  src: url("https://uploads.codesandbox.io/uploads/user/ed077012-e728-4a42-8395-cbd299149d62/AflB-FG_Virgil.ttf");
  font-display: swap;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

.container {
  display: flex;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

.sidePanel {
  width: 230px;
  background-color: #eee;

  padding: 10px;
  overflow-y: auto;

  h4 {
    margin: 10px 0 10px 0;
  }

  .panelTools {
    display: flex;
    justify-content: space-between;

    label {
      margin: 0;
    }
  }

  .panelColumn {
    display: flex;
    flex-direction: column;
  }
}

.tool {
  input[type="radio"] {
    display: none;
  }

  input[type="radio"] {
    & + .toolIcon {
      background-color: #ddd;

      width: 41px;
      height: 41px;

      display: flex;
      justify-content: center;
      align-items: center;

      border-radius: 3px;
    }
    &:hover + .toolIcon {
      background-color: #e7e5e5;
    }
    &:checked + .toolIcon {
      background-color: #bdbebc;
    }
  }
}

label {
  margin-right: 6px;
  span {
    display: inline-block;
  }
}

input[type="number"] {
  width: 30px;
}

input[type="color"] {
  margin: 2px;
}

input {
  margin-right: 5px;
}

button {
  background-color: #ddd;
  border: 1px solid #ccc;
  border-radius: 4px;
  margin: 2px 0;
  padding: 5px;
  outline: none;

  &:hover {
    background-color: #e7e5e5;
    border-color: #d6d4d4;
  }

  &:active {
    background-color: #bdbebc;
    border-color: #bdbebc;
  }

  &:disabled {
    cursor: not-allowed;
  }
}