body {
  font-family: 'Helvetica Neue', Verdana, Helvetica, Arial, sans-serif;
  max-width: 600px;
  margin: 0 auto;
  padding-top: 72px;
  -webkit-font-smoothing: antialiased;
  font-size: 1.125em;
  color: #333;
  line-height: 1.5em;
}

h1, h2, h3 {
  color: #000;
}
h1 {
  font-size: 2.5em
}

h2 {
  font-size: 2em
}

h3 {
  font-size: 1.5em
}

a {
  text-decoration: none;
  color: #09f;
}

a:hover {
  text-decoration: underline;
}

table {
    border-collapse: collapse;
}

td, th {
    border: 1px solid black;
    padding: 0;
}
th {
    text-align: center;
    min-width: 40px;
}
td {
    text-align: right;
    position: relative;
}

td input {
    border: none;
    padding: 5px;
    width: 80px;
}
td input:hover {
    background-color: #ccc;
}
td input:focus {
    background-color: #ccf;
}
td input:not(:focus) {
    text-align: right;
}


.smartborder {
    width: calc(100% + 2px);
    height: calc(100% + 2px);
    border: 3px solid blue;
    position: absolute;
    left: -4px;
    top: -4px;
    background: none;
    z-index: 999;
    /*pointer-events: none;*/
}

td input:not(:focus) + .smartborder {
    visibility: hidden;
}


.smartborder .button {
    --button-size: 20px;
    --half-button-size: 10px;
    /*pointer-events: all;/* TODO check this (what is "initial"?) */
    width: var(--button-size);
    height: var(--button-size);
    background-color: blue;
    color: white;
    border-radius: var(--half-button-size);
    position: absolute;
}
.extendrange.button {
    left: 100%;
    top: 100%;
}
.fillrange.button {
    top: 100%;
    left: calc(50% - var(--half-button-size));
}
.moverange.button {
    top: calc(50% - var(--half-button-size));
    left: calc(0px - var(--button-size));
}
.emptyrange.button {
    top: calc(0px - var(--button-size));
    left: calc(100% - var(--button-size) - 5px);
}
.deleterange.button {
    top: calc(0px - var(--button-size));
    left: 100%;
}
.copyrange.button {
    top: calc(0px - var(--button-size));
    left: 0;
}