/* ========================================
   Layout CSS - 全ページ共通レイアウト
   Header & Footer
   ======================================== */

/* ========================================
   Header
   ======================================== */
.header {
  position: relative;
  background-color: var(--color-header-bg);
  height: var(--header-height);
  z-index: 1000;
}

.header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Logo */
.header__logo {
  height: 40px;
  transition: opacity var(--transition-base);
}

.header__logo:hover {
  opacity: 0.8;
}

.header__logo img {
  height: 100%;
  width: auto;
}

/* Navigation (PC) */
.header__nav {
  display: flex;
  gap: var(--spacing-md);
}

.header__nav-link {
  padding: var(--spacing-xs) var(--spacing-sm);
  transition: color var(--transition-base);
}

.header__nav-link:hover {
  color: var(--color-accent);
}

/* Hamburger Button */
.header__hamburger {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  padding: 8px 5px;
  background: rgba(0, 0, 0, 0.4);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  z-index: 1001;
  transition: background-color var(--transition-base);
}

.header__hamburger:hover {
  background: rgba(0, 0, 0, 0.8);
}

.header__hamburger-line {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background-color: #ffffff;
  border-radius: 2px;
  transition: all var(--transition-base);
}

.header__hamburger-line:nth-child(1) {
  top: 10px;
}

.header__hamburger-line:nth-child(2) {
  top: 50%;
  transform: translate(-50%, -50%);
}

.header__hamburger-line:nth-child(3) {
  bottom: 10px;
}

/* Hamburger Animation - Transform to X */
.header__hamburger.is-active .header__hamburger-line:nth-child(1) {
  top: 50%;
  transform: translate(-50%, -50%) rotate(45deg);
}

.header__hamburger.is-active .header__hamburger-line:nth-child(2) {
  opacity: 0;
}

.header__hamburger.is-active .header__hamburger-line:nth-child(3) {
  top: 50%;
  bottom: auto;
  transform: translate(-50%, -50%) rotate(-45deg);
}

/* Mobile Menu Overlay */
.header__menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 999;
}

.header__menu-overlay.is-active {
  opacity: 1;
}

/* Mobile Menu Panel */
.header__menu-panel {
  display: none;
  position: fixed;
  top: 0;
  right: -300px;
  width: 300px;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.95);
  transition: right var(--transition-base);
  z-index: 1000;
  overflow-y: auto;
}

.header__menu-panel.is-active {
  right: 0;
}

.header__menu-nav {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
}

.header__menu-link {
  display: block;
  padding: var(--spacing-sm) 0;
  font-size: 1.125rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: color var(--transition-base);
}

.header__menu-link:hover {
  color: var(--color-accent);
}

/* Tablet & Mobile */
@media (max-width: 768px) {
  .header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
  }

  .header__logo {
    display: none;
  }

  .header__nav {
    display: none;
  }
  .header__inner {
    justify-content: end;
  }

  .header__hamburger {
    display: flex;
  }
  
  .header__menu-overlay,
  .header__menu-panel {
    display: block;
  }
}

@media (max-width: 576px) {
  .header__inner {
    padding: 0 var(--spacing-sm);
  }
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background-color: var(--color-bg-primary);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.footer__column {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footer__column:nth-child(4) {
  justify-content: center;
}

.footer__heading {
  font-size: 1rem;
  font-weight: bold;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.footer__logo {
  max-width: 200px;
  margin-top: var(--spacing-xs);
}

.footer__logo img {
  width: 100%;
  height: auto;
}

.footer__icon {
  margin-top: var(--spacing-xs);
}

.footer__icon img {
  height: 40px;
  width: auto;
}

.footer__sns {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xs);
}

.footer__sns-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  transition: background-color var(--transition-base);
}

/*
.footer__sns-link:hover {
  background-color: var(--color-accent);
}
  */

.footer__sns-icon {
  width: 20px;
  height: 20px;
  fill: var(--color-text-primary);
}

.footer__link {
  margin-top: var(--spacing-xs);
  transition: color var(--transition-base);
}

.footer__link:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.footer__copyright {
  text-align: center;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
}

@media (max-width: 576px) {
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .footer__inner {
    padding: 0 var(--spacing-sm);
  }
}

/* ========================================
   Subpage Layout - 下部ページ共通レイアウト
   ======================================== */

/* Subpage Container */
.subpage {
  padding: var(--spacing-xl) 0;
  min-height: calc(100vh - var(--header-height) - var(--footer-height));
}

.subpage__inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Subpage Title */
.subpage__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: bold;
  margin-bottom: var(--spacing-lg);
  text-align: center;
  line-height: 1.5;
}

/* Subpage Content */
.subpage__content {
  max-width: 800px;
  margin: 0 auto;
  line-height: 2;
  letter-spacing: 0.05em;
}

.subpage__text {
  font-size: clamp(0.9375rem, 2vw, 1rem);
  margin-bottom: var(--spacing-md);
}

.subpage__text:last-child {
  margin-bottom: 0;
}

/* Links in Subpage Content */
.subpage__content a {
  color: var(--color-accent);
  text-decoration: underline;
  transition: opacity var(--transition-base);
}

.subpage__content a:hover {
  opacity: 0.8;
}

/* Subpage Responsive */
@media (max-width: 768px) {
  .subpage {
    padding: var(--spacing-lg) 0;
  }

  .subpage__title {
    margin-bottom: var(--spacing-md);
  }

  .header + .subpage {
    padding-top: calc(var(--header-height) + var(--spacing-lg));
  }
}

@media (max-width: 576px) {
  .subpage {
    padding: var(--spacing-md) 0;
  }

  .subpage__inner {
    padding: 0 var(--spacing-sm);
  }

  .subpage__content {
    line-height: 1.9;
  }

  .header + .subpage {
    padding-top: calc(var(--header-height) + var(--spacing-md));
  }
}