web-drs-frontend/src/styles.scss

:root {
  --primay: black;
  --bg-primay: white;

  --link: #2a0b0b;
  text-align: center;
}

* {
  font-family: unset;
}

p {
  margin: 20px 0px;
}

button {
  &:hover:not(:disabled) {
    filter: brightness(120%);
    cursor: pointer;
  }
  &:disabled {
    filter: brightness(30%);
    cursor: default;
  }
}

body {
  margin: 0;
}

main {
  display: flex;
  flex-direction: column;

  height: calc(100vh - 40px);
  width: calc(100vw - 40px);
  justify-content: space-between;
  padding: 10px;

  .nickname {
    font-style: italic;
  }

  #container {
    min-height: 100%;
    max-height: 100%;
    display: flex;
    flex-grow: 1;

    #message-area {
      display: flex;
      flex-direction: column;
      flex-grow: 80;
      #messages-container {
        display: flex;
        flex-direction: column;
        flex-grow: 1;

        overflow-y: scroll;
        overflow-anchor: none;
        list-style: none;
        padding-inline-start: 0;
        max-width: 100%;
        overflow-wrap: break-word;

        .message {
          display: block;
          text-align: left;
          width: calc(100% - 2 * 5px);
          padding: 5px;
          white-space: pre-line;

          &:nth-child(even) {
            background-color: #f2f2f2;
          }

          > h2 {
            width: 100%;
            display: inline-flex;
            margin: 0;
            font-size: medium;
            justify-content: space-between;
          }
        }
      }
      #message-writing-area {
        display: flex;
        flex-direction: column;
        justify-content: center;

        #message-input {
          width: 80%;
        }
      }
    }

    #user-area {
      display: flex;
      flex-direction: column;
      flex-grow: 20;

      ol {
        overflow-y: scroll;
        max-height: 100%;

        > li:nth-of-type(even) {
          background-color: #f2f2f2;
        }
      }
    }
  }
}