/* ==========================================================================
   layout.css — ナビ・フッター等の共通レイアウト
   ========================================================================== */

/* ---------- Nav ---------- */
.opg-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px var(--opg-gutter);
  background: rgba(250, 248, 244, 0.78);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border-bottom: 1px solid var(--opg-border);
}

.opg-nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.opg-nav__logo img {
  height: 38px;
  width: auto;
}
.opg-nav__logo-text {
  display: flex;
  flex-direction: column;
  font-family: var(--opg-font-en);
  font-weight: 700;
  font-size: var(--opg-text-sm);
  letter-spacing: 0.02em;
  line-height: 1.05;
  color: var(--opg-logo-blue-deep);
}

.opg-nav__links {
  display: none;
  gap: 26px;
  font-size: var(--opg-text-sm);
  font-weight: 700;
}
.opg-nav__links a {
  position: relative;
  padding: 8px 2px;
  color: var(--opg-ink-soft);
  transition: color 0.2s ease;
}
.opg-nav__links a:hover { color: var(--opg-ink); }

@media (min-width: 980px) {
  .opg-nav__links { display: flex; }
}

.opg-nav__cta {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--opg-radius-pill);
  background: var(--opg-ink);
  color: #fff;
  font-weight: 700;
  font-size: var(--opg-text-sm);
  transition: transform 0.2s ease;
}
.opg-nav__cta:hover { transform: translateY(-1px); }
@media (min-width: 720px) {
  .opg-nav__cta { display: inline-flex; }
}

/* ---------- Mobile menu toggle ---------- */
.opg-nav__toggle {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  border-radius: 8px;
  background: transparent;
}
.opg-nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--opg-ink);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
@media (min-width: 980px) {
  .opg-nav__toggle { display: none; }
}

.opg-nav.is-open .opg-nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.opg-nav.is-open .opg-nav__toggle span:nth-child(2) { opacity: 0; }
.opg-nav.is-open .opg-nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Mobile menu drawer ---------- */
.opg-nav__drawer {
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: rgba(250, 248, 244, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--opg-border);
  padding: 24px var(--opg-gutter) 36px;
  display: none;
  flex-direction: column;
  gap: 6px;
  z-index: 99;
}
.opg-nav__drawer a {
  display: block;
  padding: 14px 8px;
  font-size: var(--opg-text-base);
  font-weight: 700;
  border-bottom: 1px solid var(--opg-border);
}
.opg-nav__drawer a:last-child {
  border-bottom: 0;
  margin-top: 12px;
  text-align: center;
  background: var(--opg-ink);
  color: #fff;
  border-radius: var(--opg-radius-pill);
  padding: 14px 24px;
}
.opg-nav.is-open .opg-nav__drawer { display: flex; }
@media (min-width: 980px) {
  .opg-nav__drawer { display: none !important; }
}

/* Body offset for fixed nav */
main { padding-top: 0; }

/* ---------- Footer ---------- */
.opg-footer {
  background: var(--opg-paper);
  padding: clamp(60px, 10vw, 100px) 0 60px;
  border-top: 1px solid var(--opg-border);
}
.opg-footer__inner {
  max-width: var(--opg-container);
  margin-inline: auto;
  padding-inline: var(--opg-gutter);
}
.opg-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 48px;
  gap: 14px;
}
.opg-footer__brand img {
  height: 80px;
  width: auto;
}
.opg-footer__org {
  text-align: center;
  margin-bottom: 56px;
}
.opg-footer__org-label {
  font-family: var(--opg-font-en);
  font-size: var(--opg-text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--opg-ink-mute);
  margin-bottom: 10px;
  font-weight: 700;
}
.opg-footer__org h3 {
  font-family: var(--opg-font-en);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.opg-footer__roles {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 24px 40px;
  max-width: 900px;
  margin: 0 auto;
  text-align: left;
  font-size: var(--opg-text-sm);
  color: var(--opg-ink-soft);
}
@media (max-width: 700px) {
  .opg-footer__roles { grid-template-columns: 1fr; }
}
.opg-footer__role-label {
  font-family: var(--opg-font-en);
  font-size: var(--opg-text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--opg-ink-mute);
  font-weight: 700;
  margin-bottom: 6px;
}
.opg-footer__role--committee .opg-footer__role-label::before {
  content: "—";
  margin-right: 6px;
}
.opg-footer__committee-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--opg-text-xs);
  line-height: 1.7;
  color: var(--opg-ink-soft);
}
@media (max-width: 720px) {
  .opg-footer__committee-list { grid-template-columns: 1fr; }
  .opg-footer__roles { grid-template-columns: 1fr; }
}
.opg-footer__contact {
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--opg-border);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
@media (max-width: 700px) {
  .opg-footer__contact { grid-template-columns: 1fr; }
}
.opg-footer__contact h4 {
  font-family: var(--opg-font-en);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 6px 0;
}
.opg-footer__contact p {
  font-size: var(--opg-text-sm);
  color: var(--opg-ink-soft);
  margin: 6px 0;
  line-height: 1.75;
}
.opg-footer__meta {
  font-family: var(--opg-font-en);
  font-size: var(--opg-text-xs);
  color: var(--opg-ink-mute);
  letter-spacing: 0.05em;
  font-weight: 600;
}
.opg-footer__copy {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--opg-border);
  font-family: var(--opg-font-en);
  font-size: var(--opg-text-xs);
  letter-spacing: 0.15em;
  color: var(--opg-ink-mute);
  text-align: center;
}