:root {
  --ink: #000;
  --paper: #fff;
  --muted: #666;
  --line: #d7d7d7;
  --max-width: 980px;
  --space: clamp(20px, 5vw, 56px);
  --font: Arial, "Helvetica Neue", "Noto Sans JP", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover,
a:focus-visible {
  text-decoration-thickness: 2px;
  outline: 0;
}

img {
  display: block;
  max-width: 100%;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 5;
  transform: translateY(-150%);
  background: var(--paper);
  border: 1px solid var(--ink);
  padding: 6px 10px;
}

.skip-link:focus {
  transform: translateY(0);
}

.page {
  width: min(100% - 32px, var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  background: var(--paper);
  padding: 30px 0 18px;
  border-bottom: 1px solid var(--ink);
}

.header-title {
  margin: 0;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 500;
  line-height: 1.2;
}

.site-nav {
  --active-left: 0px;
  --active-width: 0px;
  position: relative;
  display: flex;
  gap: 18px;
  padding-bottom: 5px;
  font-size: 17px;
  line-height: 1.2;
}

.site-nav::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: var(--active-width);
  height: 1px;
  background: var(--ink);
  transform: translateX(var(--active-left));
  transition:
    transform 220ms ease,
    width 220ms ease;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  transition: color 180ms ease;
}

.site-nav a.is-active,
.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
}

main {
  padding-top: var(--space);
}

.section {
  padding: var(--space) 0;
  scroll-margin-top: 92px;
}

.profile-section {
  padding-top: 0;
  border-top: 0;
}

.section-label {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 12ch;
  margin-bottom: 20px;
  font-size: clamp(44px, 9vw, 82px);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 24px;
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0;
}

.lead {
  max-width: 760px;
  margin-bottom: 0;
  font-size: clamp(18px, 2.4vw, 23px);
  line-height: 1.45;
}

.fact-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.fact-list li {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.fact-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.fact-list li:first-child {
  border-top-color: var(--ink);
}

.fact-list time {
  color: var(--muted);
  font-size: 14px;
}

.contact-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--ink);
}

.contact-row {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  margin: 0;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.contact-label {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
}

.contact-label i {
  width: 1.25em;
  color: var(--ink);
  font-size: 1.25em;
  text-align: center;
}

.contact-row strong {
  overflow-wrap: anywhere;
  font-weight: 400;
}

.works-section {
  display: grid;
  gap: 34px;
}

.works-group {
  display: grid;
  gap: 14px;
}

.works-group > h3 {
  margin-bottom: 2px;
  padding-top: 14px;
  border-top: 1px solid var(--ink);
  font-size: clamp(21px, 2.7vw, 28px);
  line-height: 1.2;
}

.bib-list {
  display: grid;
  gap: 18px;
}

.bib-entry {
  position: relative;
  padding: 0;
  padding-left: 18px;
}

.bib-entry::before {
  content: "";
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ink);
}

.bib-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: baseline;
  margin-top: 3px;
  color: var(--muted);
  font-size: 14px;
}

.bib-meta a {
  color: var(--ink);
}

.bib-badge {
  display: inline-block;
  background: var(--ink);
  color: var(--paper);
  padding: 1px 6px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.bib-title {
  margin-bottom: 3px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.3;
}

.bib-authors {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.bib-me {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.bib-loading,
.bib-error {
  margin: 0;
  padding: 16px 0;
  color: var(--muted);
}

.site-footer {
  padding: 26px 0 40px;
  border-top: 1px solid var(--ink);
  color: var(--muted);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .fact-list li,
  .contact-row {
    grid-template-columns: 1fr;
    gap: 3px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}