* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: #fff;
  color: #1a1a1a;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* left navigation */
nav.side {
  position: fixed;
  top: 0;
  left: 0;
  width: 200px;
  padding: 146px 0 0 32px;
}
nav.side ul { list-style: none; margin: 0; padding: 0; }
nav.side li { margin: 0 0 18.5px 0; line-height: 18.5px; }
nav.side a {
  display: inline-block;
  margin-left: -5px;
  padding: 0 5px;
  color: #1a1a1a;
}
nav.side a.muted { color: #999; }
nav.side a.active { background: #d5f7d5; }

/* index grid */
main.grid {
  margin-left: 230px;
  padding: 142px 40px 80px 0;
  display: grid;
  grid-template-columns: repeat(3, 170px);
  column-gap: 30px;
  row-gap: 18px;
  align-content: start;
}
.card { display: block; text-align: center; }
.card .thumb {
  display: block;
  width: 170px;
  height: 114px;
  overflow: hidden;
  background: #f2f2f2;
}
.card img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card .label { display: block; margin-top: 18px; font-weight: 700; font-size: 15px; }
.card:hover .thumb { opacity: 0.85; }

/* project page */
main.project {
  margin-left: 215px;
  padding: 70px 0 120px 0;
  width: 580px;
}
main.project figure { margin: 0 0 24px 0; }
main.project img { width: 100%; height: auto; display: block; }
main.project figcaption {
  margin-top: 10px;
  font-style: italic;
  font-size: 12px;
  color: #1a1a1a;
}

.pager {
  position: fixed;
  top: 66px;
  left: 840px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.pager a, .pager button {
  display: block;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  color: #bbb;
}
.pager a:hover, .pager button:hover { color: #777; }
.pager svg { width: 24px; height: 24px; display: block; stroke: currentColor; fill: none; stroke-width: 1.4; }

/* about */
main.about {
  margin-left: 230px;
  padding: 142px 40px 80px 0;
  max-width: 460px;
  white-space: pre-line;
}

@media (max-width: 760px) {
  nav.side { position: static; width: auto; padding: 24px 20px 0 20px; }
  nav.side ul { display: flex; flex-wrap: wrap; gap: 4px 14px; }
  nav.side li { margin: 0; }
  nav.side a { margin: 0; padding: 0; }
  nav.side a.active { padding: 0 5px; margin: 0 -5px; }
  main.grid { margin: 0; padding: 28px 20px 60px; grid-template-columns: repeat(2, 1fr); column-gap: 16px; }
  .card .thumb { width: 100%; height: auto; aspect-ratio: 3 / 2; }
  main.project { margin: 0; width: auto; padding: 24px 20px 90px; }
  .pager { top: auto; bottom: 12px; left: auto; right: 12px; flex-direction: row; background: rgba(255,255,255,0.9); padding: 4px 6px; }
  main.about { margin: 0; padding: 28px 20px 60px; }
}