/* ===================================
   Footer — ダークネイビー背景
   Template 02: Blue
   =================================== */

.footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.85);
  padding: 64px 0 0;
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* 塾情報 */
.footer__brand { }
.footer__logo {
  margin-bottom: 16px;
}
.footer__logo img {
  height: 40px;
  width: auto;
  filter: brightness(0) invert(1);
}
.footer__catchcopy {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 20px;
}
.footer__info {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 16px;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.65);
}
.footer__info dt {
  font-weight: var(--font-weight-bold);
  color: rgba(255, 255, 255, 0.8);
}

/* SNS */
.footer__sns {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}
.footer__sns a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  font-size: 0.875rem;
  transition: background 0.2s ease;
}
.footer__sns a:hover {
  background: var(--color-primary);
}

/* ナビ */
.footer__nav-title {
  font-size: 0.875rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}
.footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer__nav-list a {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.65);
  transition: color 0.2s ease;
}
.footer__nav-list a:hover {
  color: var(--color-white);
}

/* コピーライト */
.footer__bottom {
  margin-top: 48px;
  padding: 20px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}
.footer__copyright {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
}

/* === レスポンシブ === */
@media (max-width: 768px) {
  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer__brand {
    grid-column: 1 / -1;
  }
}
@media (max-width: 480px) {
  .footer__inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}