Page.css

.page {
  background: #f2f2f2;
  box-sizing: border-box;
}

.page__page {
  box-sizing: border-box;
  display: flex;
  height: 100vh;
  margin: 0 auto;
  /* max-width: 1080px; */
  overflow: hidden;
  padding: 20px 50px 20px 20px;
  position: relative;
}

.page__list {
  overflow-x: hidden;
  overflow-y: auto;
}

.page__view {
  background: white;
  border: 1px solid #222;
  border-radius: 10px;
  box-sizing: border-box;
  flex-basis: 55%;
  flex-grow: 0;
  flex-shrink: 0;
  margin-left: 20px;
  max-height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 10px;
}

.page__form-modal {
  align-items: center;
  background: rgba(255, 255, 255, .75);
  display: flex;
  flex-direction: column;
  left: 0;
  justify-content: center;
  height: 100%;
  position: absolute;
  top: 0;
  width: 100%;
}

.page__form {
  background: white;
  border: 1px solid #000;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .2);
  box-sizing: border-box;
  min-width: 300px;
  padding: 20px;
  width: 50%;
}

.page__new-email {
  bottom: 10px;
  cursor: pointer;
  font-size: 1.5em;
  position: absolute;
  right: 10px;
}