:root {
  --paper: #ffffff;
  --ink: #111318;
  --muted: #6a6f78;
  --accent: #bc002d;
  --wash: #f2f2f2;

  --gutter: 20px;
  --max: 880px;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "M PLUS 1", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  font-size: 18px;
  line-height: 1.65;
}

/* Language toggle: hide whichever language isn't selected. */
html[data-lang="en"] body [lang="ja"],
html[data-lang="ja"] body [lang="en"] {
  display: none;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

a:hover {
  color: var(--ink);
}

main,
.top,
.bottom {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- Header ---------- */

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}

.wordmark {
  color: var(--ink);
  font-weight: 800;
  font-size: 18px;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.lang-toggle {
  display: flex;
  gap: 4px;
}

.lang-toggle button {
  font: inherit;
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
  background: none;
  border: 0;
  padding: 8px 10px;
  cursor: pointer;
}

.lang-toggle button[aria-pressed="true"] {
  color: var(--paper);
  background: var(--accent);
}

/* ---------- Hero ---------- */

.hero {
  padding-top: 40px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(34px, 9vw, 76px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.01em;
}

.hero-when {
  margin: 20px 0 0;
  font-size: 20px;
  font-weight: 500;
  color: var(--accent);
}

.hero-img {
  width: calc(100% + 2 * var(--gutter));
  max-width: none;
  margin: 40px calc(-1 * var(--gutter)) 0;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- Sections ---------- */

section + section {
  margin-top: 88px;
}

.label {
  margin: 0 0 24px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ---------- Intro ---------- */

.intro-body {
  display: grid;
  gap: 32px;
}

.intro-text p {
  margin: 0 0 1em;
  font-size: 20px;
}

.intro-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---------- Meetings ---------- */

.where {
  margin: 0 0 40px;
  font-size: 20px;
  font-weight: 500;
}

.where a {
  font-weight: 400;
  font-size: 17px;
}

.dates {
  list-style: none;
  margin: 0;
  padding: 0;
}

.date {
  display: grid;
  grid-template-columns: 84px 1fr;
  column-gap: 18px;
  align-items: baseline;
  padding: 14px 0;
}

.date-day {
  white-space: nowrap;
  font-size: 44px;
  font-weight: 800;
  line-height: 1;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.date-meta {
  line-height: 1.35;
}

.date-month {
  font-weight: 800;
  font-size: 20px;
}

.date-time {
  color: var(--muted);
  font-size: 16px;
}

.date.is-next .date-day,
.date.is-next .date-month {
  color: var(--accent);
}

.date.is-next .date-day {
  font-size: 64px;
}

.next-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 8px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--paper);
  background: var(--accent);
  vertical-align: 3px;
}

.date.is-cancelled .date-day,
.date.is-cancelled .date-month {
  color: var(--muted);
  text-decoration: line-through;
  text-decoration-thickness: 3px;
}

.add-cal {
  margin: 32px 0 0;
  font-weight: 500;
}

/* ---------- Social ---------- */

.big-link {
  font-size: clamp(24px, 6vw, 36px);
  font-weight: 800;
  word-break: break-word;
}

/* ---------- Footer ---------- */

.bottom {
  margin-top: 120px;
  padding-bottom: 40px;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- Wider screens ---------- */

@media (min-width: 720px) {
  :root { --gutter: 32px; }

  .hero { padding-top: 72px; }

  .hero-img {
    width: 100%;
    margin: 56px 0 0;
    aspect-ratio: 16 / 9;
  }

  .intro-body {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
  }

  section + section { margin-top: 120px; }
}

.nowrap { white-space: nowrap; }

/* ---------- Header link ---------- */

.top { gap: 12px; }

.top-link {
  margin-left: auto;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
}

.top-link[aria-current="page"] {
  color: var(--accent);
}

/* ---------- Resources page ---------- */

.page-head {
  padding-top: 40px;
}

.page-head h1 {
  margin: 0 0 20px;
  font-size: clamp(34px, 9vw, 64px);
  font-weight: 800;
  line-height: 1.1;
}

.page-head p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.filters {
  margin: 40px 0 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filters input {
  flex: 1 1 100%;
  font: inherit;
  font-size: 17px;
  padding: 12px 14px;
  border: 0;
  border-radius: 0;
  background: var(--wash);
  color: var(--ink);
  -webkit-appearance: none;
  appearance: none;
}

.filters input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 0;
}

.filter-buttons {
  display: flex;
  gap: 8px;
}

.filter-buttons button {
  font: inherit;
  font-size: 15px;
  font-weight: 500;
  padding: 8px 14px;
  border: 0;
  border-radius: 0;
  background: var(--wash);
  color: var(--ink);
  cursor: pointer;
}

.filter-buttons button[aria-pressed="true"] {
  background: var(--accent);
  color: var(--paper);
}

.res-group {
  margin-top: 56px;
}

.res + .res {
  margin-top: 36px;
}

.res-name {
  margin: 0 0 4px;
  font-size: 22px;
  font-weight: 800;
  line-height: 1.3;
}

.res-tag {
  margin-left: 10px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  vertical-align: 2px;
  white-space: nowrap;
}

.res-desc {
  margin: 0 0 6px;
}

.res-meta,
.res-where {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
}

.res-where {
  color: var(--ink);
}

.res-notes {
  margin-top: 8px;
  font-size: 16px;
}

.res-notes summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--accent);
}

.res-notes p {
  margin: 8px 0 0;
}

.res-empty {
  margin-top: 40px;
  color: var(--muted);
}

.date-unit {
  font-size: 0.45em;
  margin-left: 2px;
}

html[data-lang="ja"] .date {
  grid-template-columns: 124px 1fr;
}