:root {
  --bg: #ede9e7;
  --card: #ffffff;
  --ink: #000000;
  --label: #957d71;
  --accent: #c88769;
  --muted: #666666;
  --disabled: #b6b3b1;
  --line: rgba(149, 125, 113, 0.42);
  --shadow: 0 5px 18px rgba(78, 60, 51, 0.08);
  --serif: "Shippori Mincho", serif;
  --sans: "Noto Sans JP", sans-serif;
}

* { box-sizing: border-box; }

html { color-scheme: light; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

.page-shell {
  width: min(100%, 640px);
  margin: 0 auto;
  padding: 44px 20px 36px;
}

.hero { text-align: center; }

.audience-label {
  margin: 0 0 12px;
  color: var(--label);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

h1, h2, .action-card, .secondary-action {
  font-family: var(--serif);
}

h1 {
  margin: 0;
  font-size: clamp(1.75rem, 7.2vw, 2.55rem);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: 0.025em;
}

.nowrap { white-space: nowrap; }

.organizer {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.rule {
  height: 1px;
  margin: 28px 0 0;
  background: var(--line);
}

.info-card {
  margin-top: 28px;
  padding: 24px 20px 22px;
  border-radius: 12px;
  background: var(--card);
  box-shadow: var(--shadow);
}

.info-card h2 {
  margin: 0 0 15px;
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.event-details { margin: 0; }

.detail-row {
  display: grid;
  grid-template-columns: 5.25rem 1fr;
  gap: 10px;
  padding: 10px 0;
  border-top: 1px solid #eee9e6;
}

.detail-row:first-child { border-top: 0; padding-top: 0; }
.detail-row:last-child { padding-bottom: 0; }

.detail-row dt {
  color: var(--label);
  font-size: 0.86rem;
  font-weight: 700;
}

.detail-row dd {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
}

.detail-row dd > span { display: block; }

.action-list {
  display: grid;
  gap: 20px;
  margin-top: 32px;
}

.action-card, .secondary-action {
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px 14px 20px;
  border: 1px solid rgba(149, 125, 113, 0.08);
  border-radius: 12px;
  background: var(--card);
  box-shadow: var(--shadow);
  text-decoration: none;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.action-card:hover, .secondary-action:hover { box-shadow: 0 7px 22px rgba(78, 60, 51, 0.13); }
.action-card:active, .secondary-action:active { transform: translateY(1px); }

.action-card:focus-visible, .secondary-action:focus-visible, .back-link:focus-visible,
.qa-question:focus-visible, #qa-search:focus-visible {
  outline: 3px solid rgba(200, 135, 105, 0.48);
  outline-offset: 3px;
}

.action-text { font-size: 1.05rem; font-weight: 600; }
.chevron, .secondary-action > span { color: var(--accent); font-family: var(--sans); font-size: 2rem; font-weight: 300; line-height: 1; }

.action-note {
  margin: 7px 6px 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.6;
}

.action-card.is-disabled {
  color: #fff;
  background: var(--disabled);
  box-shadow: none;
  cursor: not-allowed;
}

.action-card.is-disabled .chevron { color: rgba(255, 255, 255, 0.7); }

.site-footer {
  margin-top: 54px;
  text-align: center;
}

.friend-message {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.08rem;
  font-weight: 600;
}

.footer-organizer {
  margin: 12px 0 0;
  color: var(--label);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

/* Q&A */
.qa-header h1 { font-size: clamp(1.9rem, 7.5vw, 2.65rem); }
.qa-header .rule { margin-top: 23px; }

.last-updated {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
  text-align: right;
}

.qa-content { margin-top: 27px; }

.search-label {
  display: block;
  margin-bottom: 7px;
  font-size: 0.86rem;
  font-weight: 600;
}

.search-wrap { position: relative; }
.search-wrap svg {
  position: absolute;
  top: 50%;
  left: 16px;
  fill: none;
  stroke: var(--label);
  stroke-linecap: round;
  stroke-width: 1.8;
  transform: translateY(-50%);
  pointer-events: none;
}

#qa-search {
  width: 100%;
  min-height: 54px;
  padding: 12px 16px 12px 49px;
  border: 1px solid rgba(149, 125, 113, 0.28);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  font-size: 1rem;
}

#qa-search::placeholder { color: #8b8886; }

.status-message {
  margin: 28px 0;
  padding: 26px 20px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.66);
  color: var(--muted);
  text-align: center;
}

.qa-category { margin-top: 34px; }

.qa-category h2 {
  margin: 0 0 11px;
  color: var(--label);
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 700;
}

.qa-item {
  overflow: hidden;
  margin-top: 10px;
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow);
}

.qa-question {
  display: grid;
  width: 100%;
  min-height: 68px;
  grid-template-columns: auto 1fr auto auto;
  align-items: start;
  gap: 9px;
  padding: 18px;
  border: 0;
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.qa-mark {
  color: var(--accent);
  font-family: var(--serif);
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.6;
}

.question-text { font-weight: 600; line-height: 1.7; }

.new-badge {
  align-self: center;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.accordion-icon {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 5px;
}

.accordion-icon::before, .accordion-icon::after {
  position: absolute;
  top: 8px;
  left: 2px;
  width: 14px;
  height: 1.5px;
  background: var(--label);
  content: "";
}

.accordion-icon::after { transform: rotate(90deg); transition: transform 140ms ease; }
.qa-question[aria-expanded="true"] .accordion-icon::after { transform: rotate(0); }

.qa-answer {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 9px;
  padding: 17px 18px 21px;
  border-top: 1px solid #eee9e6;
  background: #fdfcfb;
}

.qa-answer[hidden] { display: none; }
.qa-answer p { margin: 0; line-height: 1.85; white-space: pre-wrap; }
.answer-mark { color: var(--label); }

.qa-footer {
  display: grid;
  gap: 20px;
  margin-top: 46px;
  text-align: center;
}

.secondary-action { font-size: 1.05rem; font-weight: 600; text-align: left; }
.back-link { width: fit-content; margin: 0 auto; color: var(--muted); font-size: 0.92rem; text-underline-offset: 4px; }

@media (min-width: 560px) {
  .page-shell { padding: 64px 34px 44px; }
  .mobile-break { display: none; }
  .info-card { padding: 28px 26px 26px; }
  .detail-row { grid-template-columns: 6.5rem 1fr; }
  .action-card { padding-inline: 24px 21px; }
}

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