:root {
  --ink: #000;
  --paper: #fff;
  --paper-cream: #f9f7dc;
  --paper-mint: #e3f1e8;
  --paper-sky: #e4ebfb;
  --accent-blue: #0008ff;
  --accent-orange: #ff4a00;
  --accent-green: #009a4e;
}

* { box-sizing: border-box; }

@font-face {
  font-family: "iA Writer Quattro";
  src: url("../assets/iAWriterQuattroS-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Train One";
  src: url("../assets/TrainOne-Latin.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

html {
  font-size: 10px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Neue Haas Grotesk", "Inter", "Helvetica Neue", Helvetica, "Source Han Sans JP", "Noto Sans JP", sans-serif;
  font-size: 1.6rem;
  line-height: 1.6;
  font-weight: 400;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.cream { --paper: var(--paper-cream); }
body.mint  { --paper: var(--paper-mint); }
body.sky   { --paper: var(--paper-sky); }

a {
  color: var(--ink);
  text-decoration: none;
}
a:active { opacity: 0.7; }

main a { color: var(--accent-blue); }
main a:hover { color: var(--accent-orange); }

.pill {
  display: inline-block;
  color: var(--ink);
  background: var(--paper);
  border: 0.08em solid var(--ink);
  border-radius: 1.6rem;
  padding: 0.1rem 1.2rem;
  font-size: 1.6rem;
  line-height: 1.6;
}
.pill:hover { color: var(--paper); background: var(--ink); }
.pill.active { color: var(--accent-orange); border-color: var(--accent-orange); }

.topbar { position: sticky; top: 0; z-index: 100; background: var(--paper); }
.topbar-inner {

  max-width: none; margin: 0; padding: 1.8rem 2.4rem;
  display: flex; flex-wrap: wrap; align-items: baseline;
  justify-content: space-between; gap: 0.6rem 2rem;
}
.topbar .brand { font-size: 2.3rem; font-weight: 400; text-decoration: none; }
.topbar nav { display: flex; flex-wrap: wrap; gap: 0.6rem 1.8rem; font-size: 1.5rem; }
.topbar nav a:hover { color: var(--accent-orange); }
.topbar nav a.active { color: var(--accent-orange); }

main {
  max-width: 96rem;
  width: 100%;
  margin: 0 auto;
  padding: 4rem 2.4rem 8rem;
  flex: 1 0 auto;
}

.site-footer {
  flex-shrink: 0;
  border-top: 1px solid rgba(0, 0, 0, 0.12);
}
.footer-inner {
  max-width: 96rem;
  margin: 0 auto;
  padding: 2.4rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.4rem 2rem;
  font-size: 1.2rem;
  color: rgba(0, 0, 0, 0.62);
}

h2.sec {
  color: var(--accent-green);
  font-size: 2.5rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  margin: 9rem 0 1.6rem;
}
h2.sec:first-child { margin-top: 0; }
h3.subsec { font-size: 1.6rem; font-weight: 700; color: var(--ink); letter-spacing: 0.03em; margin: 2.8rem 0 0.8rem; }

.rail-row {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 3.5rem;
  align-items: start;
  margin-top: 5rem;
}
.rail-head { text-align: right; }
.rail-head .sec { margin: 0; }
.rail-head .ver { color: rgba(0, 0, 0, 0.62); font-size: 1.2rem; margin-top: 0.6rem; }
.rail-head .sec-more { font-size: 1.2rem; margin-top: 0.4rem; }
.rail-body > :first-child { margin-top: 0; }
.about-grid { margin-bottom: 1rem; }

.statement {
  font-family: "iA Writer Quattro", "Neue Haas Grotesk", Helvetica, sans-serif;
  font-size: 2.3rem;
  line-height: 1.5;
  font-weight: 400;
  margin: 2rem 0 2.4rem;
  text-wrap: balance;
}

.vision-lead::first-letter {
  float: left;
  font-size: 4.8rem;
  line-height: 0.72;
  font-weight: 500;
  padding: 0.6rem 1.2rem 0 0;
  color: var(--accent-orange);
}

.kw-line {
  font-size: 2.2rem;
  line-height: 1.5;
  font-weight: 400;
}
.kw-sep { color: var(--accent-orange); margin: 0 0.5rem; }

.tags { line-height: 1; }
.tags span {
  display: inline-block;
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  border: 0.08em solid var(--ink);
  border-radius: 999px;
  padding: 0.1rem 1.1rem;
  margin: 0 0.6rem 0.8rem 0;
}

.page-title {
  font-family: "Train One", "Neue Haas Grotesk", "Noto Sans JP", sans-serif;
  font-weight: 400;
  font-size: 4rem;
  letter-spacing: 0.02em;
  line-height: 1.1;
  margin: 0 0 2.4rem;
  color: var(--ink);
}

h1.about-name {
  font-size: 3.4rem;
  font-weight: 400;
  line-height: 1.2;
  margin: 0 0 2rem;
}
.affil-block { margin: 0 0 1.2rem; }
.social-row { margin-top: 2rem; }

.about-grid {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 3.5rem;
  align-items: start;
}
.about-grid .photo img { width: 100%; height: auto; display: block; }

.cv-grid {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 3.5rem;
  align-items: start;
}
.cv-grid .photo img { width: 100%; height: auto; display: block; }

.small-body { font-size: 1.4rem; line-height: 1.55; }
.lead-accent { color: var(--accent-orange); }
.small-body .item { margin-bottom: 2.2rem; }
.small-body .period { display: block; color: rgba(0,0,0,0.62); }

.sec-more { font-size: 1.2rem; color: var(--ink); }
.news-legend { font-size: 1.2rem; color: rgba(0,0,0,0.62); letter-spacing: 0.03em; margin-top: 1.2rem; }
.news-table .news-item {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 2rem;
  margin: 0;
  padding: 1.6rem 0.6rem;
}
.news-table .news-item .date { font-size: 1.3rem; color: var(--ink); margin: 0; }
.news-table .news-item.milestone { background: rgba(0, 0, 0, 0.05); }
.news-table .news-item p { margin: 0 0 0.4rem; }
.news-table .news-item p:last-child { margin-bottom: 0; }

.news-item { margin-bottom: 3.2rem; font-size: 1.4rem; line-height: 1.55; }
.news-item .date { display: block; color: rgba(0,0,0,0.62); font-size: 1.2rem; }
.news-item.important { border: 0.08em solid var(--ink); border-radius: 1rem; padding: 1.2rem 1.6rem; }

.pub-item { margin-bottom: 1.6rem; font-size: 1.4rem; line-height: 1.7; }
.pub-item b { font-weight: 700; }

.works {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(28rem, 1fr));
  gap: 0.5rem;
}
.thumb { position: relative; display: block; }
.thumb img, .thumb svg.art { display: block; width: 100%; aspect-ratio: 4/3; object-fit: contain; background: var(--paper); }
.thumb .title {
  position: absolute; inset: 0; z-index: 9;
  display: flex; align-items: center; justify-content: center; text-align: center;
  background: var(--ink); color: var(--paper);
  font-size: 1.2rem; padding: 1rem 1.2rem; opacity: 0;
}
.thumb:hover .title { opacity: 1; }

@media (max-width: 700px) {
  .about-grid, .cv-grid { grid-template-columns: 1fr; }
  .about-grid .photo { order: -1; max-width: 24rem; }
  .rail-row { grid-template-columns: 1fr; gap: 0.8rem; margin-top: 4rem; }
  .rail-head { text-align: left; }
  main { padding-top: 10rem; }
  .thumb:hover .title { opacity: 0; }
}