html {
  touch-action: manipulation;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  -webkit-text-size-adjust: 100%;
  color: #333;
  background-color: #f8f8f8;
  font-family: sans-serif;
  font-feature-settings: "palt";
  font-size: 16px;
  line-height: 27px;
  letter-spacing: 0.03em;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  word-break: keep-all;
  line-height: 1.2em;
  letter-spacing: 0.02em;
}

h1 {
  font-size: 3em;
}

h2 {
  font-size: 2em;
}

h3 {
  font-size: 1.4em;
}

h4 {
  font-size: 1.1em;
}

p {
  margin: 0;
  line-break: strict;
  scroll-margin-top: 2em;
}

p.right {
  text-align: right;
}

img {
  display: block;
  margin: 0;
  width: 100%;
  column-span: all;
}

p img {
  display: inline;
  margin: 0;
}

a {
  color: blue;
  text-decoration: underline;
  text-decoration-color: white;
}

sup {
  vertical-align: top;
  font-size: 0.75em;
}

header {
  position: relative;
  margin: 3em 3em 1.5em 3em;
  padding: 0 0 3em 0;
  text-align: center;
}

header::after {
  position: absolute;
  bottom: 0;
  left: calc(50% - 8px);
  content: "✦";
  font-size: 16px;
}

header h1 {
  font-family: serif;
  font-weight: 800;
  margin-bottom: 0.5em;
  letter-spacing: 0;
}

main {
  display: grid;
  margin: 0 auto 3em auto;
  padding: 0 3em;
  grid-template-columns: repeat(12, 1fr);
  gap: 1em;
  max-width: 1024px;
  grid-auto-flow: dense;
}

section {
  position: relative;
  overflow: hidden;
  grid-column: span 3;
  scroll-margin-top: 2em;
}

section>h2:first-child,
section>h3:first-child,
section>h4:first-child {
  padding: 0;
}

article {
  margin: 1.6em 0;
}

p:not(:first-of-type) {
  margin: 1em 0 0 0;
}

.row-top {
  grid-row: 1;
}

.row-bottom {
  grid-row: -1;
}

.column-main {
  grid-column: 1 / 10;
}

.column-right {
  grid-column: 10 / 13;
}

.column-bottom {
  grid-column: 1 / 13;
}

.full-item {
  grid-column: span 12;
}

.large-item {
  grid-column: span 9;
}

.middle-item {
  grid-column: span 8;
}

.mini-item {
  grid-column: span 8;
}

.half-item {
  grid-column: span 7;
}

.half-small-item {
  grid-column: span 5;
}

.half-small-item.tower-item {
  grid-column: span 6;
}

.small-item {
  grid-column: span 5;
}

.micro-item {
  grid-column: span 4;
}

.nano-item {
  grid-column: span 3;
}

.scraper-item {
  grid-column: span 4;
  grid-row: span 10;
}

.tower-item {
  grid-row: span 3;
}

.vertical-item {
  grid-row: span 2;
}

.multicolumn-small {
  column-width: 15em;
  column-gap: 0.8em;
}

.multicolumn-middle {
  column-width: 18em;
  column-gap: 0.8em;
}

.multicolumn-large {
  column-width: 20em;
  column-gap: 0.8em;
}

.multicolumn-four {
  column-count: 4;
  column-gap: 0.8em;
}

.author {
  display: block;
  margin: 1em 0;
}

.credit {
  display: inline-block;
  font-size: 0.75em;
  line-height: 1.2em;
  color: #666;
}

@media screen and (max-width: 960px) {
  header {
    margin-top: 2em;
  }

  main {
    padding: 0 2em;
    grid-template-columns: repeat(6, 1fr);
  }

  .full-item {
    grid-column: span 6;
  }

  .large-item {
    grid-column: span 6;
  }

  .middle-item {
    grid-column: span 4;
  }

  .mini-item {
    grid-column: span 6;
  }

  .half-item {
    grid-column: span 4;
  }

  .half-small-item {
    grid-column: span 4;
    grid-row: span 3;
  }

  .small-item {
    grid-column: span 2;
  }

  .micro-item {
    grid-column: span 2;
  }

  .nano-item {
    grid-column: span 2;
  }

  section {
    grid-column: span 3;
  }

  .scraper-item {
    grid-column: span 3;
    grid-row: span 3;
  }

  .tower-item {
    grid-row: span 1;
  }

  .vertical-item {
    grid-row: span 1;
  }

  .column-right {
    grid-column: 1 / 3;
    grid-row: span 1;
  }
}

@media screen and (max-width: 768px) {
  main {
    padding: 0 1em;
    grid-template-columns: repeat(2, 1fr);
  }

  .full-item {
    grid-column: span 2;
  }

  .large-item {
    grid-column: span 2;
  }

  .middle-item {
    grid-column: span 2;
  }

  .mini-item {
    grid-column: span 1;
  }

  .half-item {
    grid-column: span 2;
  }

  .half-small-item {
    grid-column: span 2;
  }

  .half-item.vertical-item {
    grid-column: span 2;
  }

  .half-small-item.vertical-item {
    grid-column: span 2;
  }

  .small-item {
    grid-column: span 1;
  }

  .micro-item {
    grid-column: span 1;
  }

  .nano-item {
    grid-column: span 1;
  }

  section {
    grid-column: span 1;
  }

  .scraper-item {
    grid-column: span 2;
    grid-row: span 2;
  }

  .tower-item {
    grid-row: span 2;
  }

  .vertical-item {
    grid-row: span 2;
  }

  .column-right {
    grid-column: 2 / 3;
    grid-row: span 3;
  }
}

.bokuprojectojisan {
  position: relative;
  writing-mode: vertical-rl;
  text-orientation: upright;
  background-image: url("../assets/bokupurojekutoojisan.png");
  background-size: cover;
  width: 100%;
  aspect-ratio: 3 / 4;
}

.bokuprojectojisan h2 {
  position: absolute;
  top: 0.5em;
  right: 0.5em;
  font-size: 1.6em
}

h3.small {
  font-size: 0.75em;
  font-weight: normal;
  margin: 1em 0 0 1em;
  line-height: 1.3em;
}

@media screen and (max-width: 768px) {
  .bokuprojectojisan h2 {
    font-size: 1.2em;
  }
}

.bokuprojectojisan span {
  position: absolute;
  bottom: 1em;
  left: 1em;
}

footer {
  display: grid;
  place-items: center;
  position: relative;
  padding-top: 3em;
  font-size: 0.9em;
  text-align: center;
  color: #666;
  grid-column: 1 / -1;
}

footer::before {
  position: absolute;
  top: 0;
  left: calc(50% - 8px);
  content: "✦";
  font-size: 16px;
}

footer * {
  margin: 0 1em;
}

.indent {
  margin: 1em 0 0.5em 0;
  padding: 0 0 0.5em 1.2em;
  border-left: #bbb solid 1px;
}

.indent h4 {
  padding: 1em 0 1.2em 0;
}

.note {
  display: inline-block;
  font-size: 0.95em;
  line-height: 1.5em;
  margin-top: 0.5em;
  color: #666;
}