/* ===== Footer ===== */
:root {
  --navy:        #00167A;
  --navy-dark:   #0D1240;
  --gold:        #C9A84C;
  --gold-light:  #E8C97A;
  --brown:       #5C2E1A;
  --brown-mid:   #8B4513;
  --brown-light: #C47A3A;
  --brown-pale:  #F5EDE4;
  --green:       #1B4D2E;
  --green-mid:   #2D7A4F;
  --green-light: #3A7D58;
  --green-pale:  #E4EDEA;
  --slate:       #2D3348;
  --slate-mid:   #4C5470;
  --slate-light: #7080A8;
  --slate-pale:  #ECEEF5;
  --teal:        #0A4D4D;
  --teal-mid:    #0D6B6B;
  --teal-light:  #2A9090;
  --teal-pale:   #E5EFEF;
  --pdf:         #5C1A30;
  --pdf-mid:     #8B2A4A;
  --pdf-light:   #B03A65;
  --pdf-pale:    #F5E8ED;
  --blue:        #0C3E6B;
  --blue-mid:    #1565A0;
  --blue-light:  #4BA3D4;
  --blue-pale:   #E5EFF7;
  --purple:      #3A0E6B;
  --purple-mid:  #5C1A9B;
  --purple-light:#9B6DD4;
  --purple-pale: #F0EAF8;
  --gray-bg:     #F8F9FA;
  --gray-mid:    #E8EAED;
  --text:        #2C2C2C;
  --text-sub:    #666666;
  --white:       #FFFFFF;
}

footer {
  background: var(--navy-dark);
  border-top: 1px solid rgba(201,168,76,0.25);
}

/* =========================
   Main
========================= */
.footer-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 64px;
}

.footer-brand .logo-text {
  font-size: 20px;
  margin-bottom: 16px;
  display: block;
}

.footer-brand p {
  color: rgba(255,255,255,0.55);
  font-size: 13px;
  line-height: 1.9;
}

/* =========================
   Navigation
========================= */

.footer-nav {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
}

.footer-nav-group h4,
.accordion-toggle {
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(201,168,76,0.2);
}

.footer-nav-group a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  padding: 5px 0;
  transition: color 0.2s;
  text-decoration: none;
}

.footer-nav-group a:hover {
  color: var(--gold);
}

/* =========================
   Services Column
========================= */
.footer-nav-group.services-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 24px;
}

.footer-nav-group.services-col h4,
.footer-nav-group.services-col .accordion-toggle {
  grid-column: 1 / -1;
}

/* =========================
   Accordion
========================= */
.accordion-toggle {
  background: none;
  border-left: none;
  border-right: none;
  border-top: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  position: relative;
}

/* PCでは矢印非表示 */
.accordion-toggle::after {
  display: none;
}

/* PCでは常時表示 */
.accordion-menu {
  display: block;
}

/* =========================
   Bottom
========================= */
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 24px;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal a {
  color: rgba(255,255,255,0.45);
  font-size: 12px;
  transition: color 0.2s;
  text-decoration: none;
}

.footer-legal a:hover {
  color: var(--gold);
}

.footer-copy {
  color: rgba(255,255,255,0.35);
  font-size: 12px;
  font-family: 'Noto Sans JP', sans-serif;
}

/* =========================
   SP
========================= */
@media screen and (max-width: 768px) {
  .footer-main {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 40px 20px 32px;
  }

  .footer-nav {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* SPでは1列 */
  .footer-nav-group.services-col {
    grid-template-columns: 1fr;
  }

  /* アコーディオン */
  .accordion-menu {
    display: none;
    padding-top: 8px;
  }

  .accordion.open .accordion-menu {
    display: block;
    animation: dropIn 0.25s ease;
  }

  /* SPのみ矢印表示 */
  .accordion-toggle::after {
    content: "+";
    display: block;
    position: absolute;
    right: 0;
    top: 0;
    font-size: 18px;
    line-height: 1;
  }

  .accordion.open .accordion-toggle::after {
    content: "−";
  }

  /* Bottom */
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .footer-legal {
    flex-direction: column;
    gap: 12px;
  }
}

/* =========================
   Animation
========================= */
@keyframes dropIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}