vanilla-todo/public/styles/todo-frame.css

.todo-frame {
  position: relative;
  user-select: none;
}

.todo-frame > .leftcontrols,
.todo-frame > .rightcontrols {
  position: absolute;
  top: 0;
  width: 52px;
  padding: 1.5em 0;
  text-align: center;
}

.todo-frame > .leftcontrols {
  left: 0;
}

.todo-frame > .rightcontrols {
  right: 0;
}

.todo-frame > .leftcontrols > p,
.todo-frame > .rightcontrols > p {
  margin: 0 0 0.5em;
}

.todo-frame > .rightcontrols > .datepicker {
  position: absolute;
  right: 10px;
}

.todo-frame > .container {
  position: absolute;
  overflow: hidden;
  inset: 0 52px;
}

.todo-frame > .container > .card {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  transition:
    transform 0.2s ease-out,
    opacity 0.2s ease-out;
}

.todo-frame.-animated {
  transition: height 0.2s ease-out;
}

@media (width >= 600px) {
  .todo-frame > .container {
    right: 70px;
    left: 70px;
  }

  .todo-frame > .leftcontrols,
  .todo-frame > .rightcontrols {
    width: 70px;
  }

  .todo-frame > .container > .card {
    width: 50%;
  }
}

@media (width >= 768px) {
  .todo-frame > .container > .card {
    width: 33.333%;
  }
}

@media (width >= 1024px) {
  .todo-frame > .container > .card {
    width: 25%;
  }
}

@media (width >= 1280px) {
  .todo-frame > .container > .card {
    width: 20%;
  }
}