:root {
  color-scheme: light;
  --paper: #f4f6f2;
  --surface: #ffffff;
  --ink: #182329;
  --muted: #43545d;
  --rule: #737e82;
  --rule-light: #d3d9d7;
  --beam: #e9c965;
  --beam-ink: #3b2c00;
  --shadow-blue: #dce8ec;
  --shadow-ink: #203d4a;
  --focus: #173f58;
  --page-width: 1120px;
  font-family: "Segoe UI", "Yu Gothic UI", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.65;
}

button,
input,
select {
  color: inherit;
  font: inherit;
}

a {
  color: var(--shadow-ink);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.page-width {
  width: min(var(--page-width), calc(100% - 3rem));
  margin-inline: auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  z-index: 2;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.65rem 1rem;
  transform: translateY(-160%);
  background: var(--ink);
  color: var(--surface);
}

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

.masthead {
  border-bottom: 1px solid var(--rule-light);
}

.masthead__inner,
.page-footer__inner {
  display: flex;
  min-height: 4.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  text-decoration: none;
}

.wordmark__initials {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border: 1px solid var(--ink);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.wordmark__label,
.source-note__label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.profile-link,
.page-footer a {
  font-size: 0.9rem;
  font-weight: 600;
}

.opening {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.48fr);
  align-items: end;
  gap: 3rem;
  padding-block: clamp(3.5rem, 8vw, 6.5rem) 2.5rem;
}

.opening h1 {
  max-width: 14ch;
  margin: 0;
  font-size: clamp(2.25rem, 5.5vw, 4.5rem);
  font-weight: 650;
  letter-spacing: -0.045em;
  line-height: 1.12;
  text-wrap: balance;
}

.opening__summary {
  max-width: 42rem;
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.2rem);
}

.source-note {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0 0.4rem 1.25rem;
  border-top: 1px solid var(--rule);
}

.source-note__mark {
  flex: 0 0 1rem;
  width: 1rem;
  height: 1rem;
  background: var(--beam);
  outline: 1px solid var(--beam-ink);
  outline-offset: 2px;
}

.source-note__label,
.source-note__value {
  margin: 0;
}

.source-note__label {
  color: var(--muted);
  letter-spacing: 0.03em;
}

.source-note__value {
  margin-top: 0.15rem;
  font-size: 0.95rem;
  font-weight: 650;
}

.activity {
  border-block: 1px solid var(--rule);
}

.activity__totals {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(13rem, 1.3fr);
  margin: 0;
}

.activity-total,
.activity__updated {
  display: flex;
  min-height: 6.25rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.4rem;
  border-right: 1px solid var(--rule-light);
}

.activity-total:first-child {
  padding-left: 0;
}

.activity-total dt,
.activity__updated dt {
  color: var(--muted);
  font-size: 0.9rem;
}

.activity-total dd,
.activity__updated dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
}

.activity-total dd {
  font-size: 1.75rem;
  font-weight: 650;
  letter-spacing: -0.04em;
}

.activity-total--attending dd {
  color: var(--shadow-ink);
}

.activity-total--organizing dd {
  color: var(--beam-ink);
}

.activity-total--speaking dd {
  color: var(--ink);
}

.activity__updated {
  justify-content: flex-end;
  gap: 1.25rem;
  padding-right: 0;
  border: 0;
}

.activity__updated dd {
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 600;
}

.records {
  padding-block: 4rem 5rem;
}

.records__heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 1.25rem;
}

.records__heading h2 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 650;
  letter-spacing: -0.025em;
}

.records__heading p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.7fr) minmax(9.5rem, 0.28fr);
  align-items: end;
  gap: 1.25rem;
  padding-block: 1rem 1.25rem;
  border-block: 1px solid var(--rule-light);
}

.control-label {
  display: block;
  margin: 0 0 0.4rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 650;
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.filter-button {
  min-height: 2.75rem;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--rule);
  border-radius: 0;
  background: var(--surface);
  cursor: pointer;
  font-size: 0.9rem;
}

.filter-button[aria-pressed="true"] {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--surface);
}

.filter-button:hover:not([aria-pressed="true"]) {
  background: var(--shadow-blue);
}

.search-control input,
.sort-control select {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--rule);
  border-radius: 0;
  background: var(--surface);
}

.search-control input::placeholder {
  color: #52616a;
  opacity: 1;
}

.results-status {
  min-height: 1.75rem;
  margin: 1.25rem 0 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.timeline {
  border-top: 1px solid var(--rule);
}

.timeline-year {
  display: grid;
  grid-template-columns: minmax(7rem, 0.25fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 5vw, 5rem);
  padding-block: 1.6rem 2rem;
  border-bottom: 1px solid var(--rule);
}

.year-heading {
  position: sticky;
  top: 1rem;
  align-self: start;
  margin: 0;
  color: var(--shadow-ink);
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-variant-numeric: tabular-nums;
  font-weight: 550;
  letter-spacing: -0.045em;
  line-height: 1.1;
}

.year-heading__suffix {
  margin-left: 0.3rem;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0;
}

.year-events {
  position: relative;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.year-events::before {
  position: absolute;
  top: 0.4rem;
  bottom: 0.4rem;
  left: 0.28rem;
  width: 1px;
  background: var(--rule);
  content: "";
}

.event-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(7.5rem, 0.28fr) minmax(0, 1fr);
  gap: 1.5rem;
  padding: 0.2rem 0 1.9rem 1.5rem;
}

.event-row:last-child {
  padding-bottom: 0.2rem;
}

.event-row::before {
  position: absolute;
  top: 0.55rem;
  left: 0;
  width: 0.6rem;
  height: 0.6rem;
  border: 1px solid var(--shadow-ink);
  border-radius: 50%;
  background: var(--paper);
  content: "";
}

.event-row--latest::before {
  border-color: var(--beam-ink);
  background: var(--beam);
}

.event-date {
  padding-top: 0.25rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

.event-content {
  min-width: 0;
}

.event-roles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.45rem;
}

.role-label {
  display: inline-flex;
  min-height: 1.65rem;
  align-items: center;
  padding: 0.12rem 0.5rem;
  border: 1px solid var(--rule);
  background: var(--surface);
  color: var(--ink);
  font-size: 0.75rem;
  font-weight: 650;
  line-height: 1.3;
}

.role-label--attending {
  border-style: solid;
}

.role-label--organizing {
  border-color: #765000;
  background: #fbf3d8;
  color: #3b2c00;
}

.role-label--speaking {
  border-color: #45616e;
  background: var(--shadow-blue);
  color: #183744;
}

.event-title {
  margin: 0;
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
  font-weight: 650;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.event-title a {
  color: var(--ink);
}

.event-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1rem;
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.event-catch {
  max-width: 72ch;
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.empty-state,
.noscript-message {
  padding: 2rem 0;
  border-top: 1px solid var(--rule);
  color: var(--muted);
}

.empty-state h3 {
  margin: 0;
  color: var(--ink);
  font-size: 1.2rem;
}

.empty-state p {
  max-width: 65ch;
  margin: 0.5rem 0 1rem;
}

.empty-state[hidden] {
  display: none;
}

.page-footer {
  border-top: 1px solid var(--rule-light);
}

.page-footer__inner {
  min-height: 5rem;
}

.page-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.page-footer a {
  white-space: nowrap;
}

@media (max-width: 760px) {
  .page-width {
    width: min(var(--page-width), calc(100% - 2rem));
  }

  .opening {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-top: 3.5rem;
  }

  .source-note {
    max-width: 28rem;
  }

  .activity__totals {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .activity-total {
    min-height: 5.5rem;
    padding-inline: 0.75rem;
  }

  .activity-total:first-child {
    padding-left: 0;
  }

  .activity-total dt {
    font-size: 0.82rem;
  }

  .activity-total dd {
    font-size: 1.5rem;
  }

  .activity__updated {
    min-height: 3.5rem;
    grid-column: 1 / -1;
    justify-content: space-between;
    padding: 0.7rem 0;
    border-top: 1px solid var(--rule-light);
  }

  .records {
    padding-block: 3rem 4rem;
  }

  .controls {
    grid-template-columns: minmax(0, 1fr) minmax(8rem, 0.5fr);
  }

  .filter-control {
    grid-column: 1 / -1;
  }

  .timeline-year {
    grid-template-columns: 5rem minmax(0, 1fr);
    gap: 1.25rem;
  }

  .event-row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

@media (max-width: 480px) {
  .masthead__inner {
    min-height: 4rem;
  }

  .wordmark {
    gap: 0.55rem;
  }

  .wordmark__label {
    font-size: 0.68rem;
  }

  .profile-link {
    font-size: 0.8rem;
  }

  .opening {
    padding-block: 3rem 2rem;
  }

  .records__heading {
    display: block;
  }

  .records__heading p {
    margin-top: 0.25rem;
  }

  .controls {
    grid-template-columns: 1fr;
  }

  .filter-control {
    grid-column: auto;
  }

  .timeline-year {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .year-heading {
    position: static;
    font-size: 1.8rem;
  }

  .event-row {
    padding-bottom: 1.5rem;
  }

  .page-footer__inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 0.35rem;
    padding-block: 1rem;
  }
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }

  .filter-button,
  .skip-link {
    transition: background-color 140ms ease-out, color 140ms ease-out, transform 180ms ease-out;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}