/*
 * layout.css
 * ヘッダー、グリッド、スペーシング、レイアウト
 * 富士にミサイルやめて！の会
 */

/* ========================================
   コンテナ
   ======================================== */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ========================================
   ヘッダー
   ======================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  height: 64px;
  max-width: 1400px;
}

/* ヘッダーブランド（ロゴ + 会名） */
.header-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo {
  display: flex;
  align-items: center;
}

.logo-image {
  height: 40px;
  width: auto;
}

.site-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}

.site-name:hover {
  text-decoration: none;
}

@media (min-width: 768px) {
  .site-name {
    font-size: 1.125rem;
  }
}

/* ========================================
   ナビゲーション
   ======================================== */

.main-nav {
  display: none;
}

.main-nav ul {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.main-nav a {
  font-size: 1rem;
  color: var(--color-text);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.is-active {
  color: var(--color-primary);
  text-decoration: none;
}

.main-nav .button {
  margin-left: var(--spacing-sm);
}

.main-nav .button-primary {
  color: #ffffff;
}

.main-nav .button-primary:hover {
  color: #ffffff;
}

/* モバイルメニューボタン */
.menu-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
}

.menu-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* ハンバーガーメニュー開閉アニメーション */
.menu-toggle.is-active .menu-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.is-active .menu-toggle-bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-active .menu-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* モバイルナビゲーション */
.mobile-nav {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg);
  z-index: 99;
  overflow-y: auto;
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav ul {
  padding: var(--spacing-lg);
}

.mobile-nav li {
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav a {
  display: block;
  padding: var(--spacing-md) 0;
  font-size: 1rem;
  color: var(--color-text);
}

.mobile-nav a:hover,
.mobile-nav a.is-active {
  color: var(--color-primary);
  text-decoration: none;
}

.mobile-nav .button {
  display: block;
  margin-top: var(--spacing-md);
  text-align: center;
}

.mobile-nav .button-primary {
  color: #ffffff;
  background-color: var(--color-primary);
}

.mobile-nav .button-primary:hover {
  color: #ffffff;
  background-color: var(--color-primary-dark);
}

/* PC表示 */
@media (min-width: 1024px) {
  .main-nav {
    display: block;
  }

  .menu-toggle {
    display: none;
  }

  .mobile-nav {
    display: none !important;
  }
}

/* ========================================
   メインコンテンツ
   ======================================== */

main {
  min-height: calc(100vh - 64px - 200px);
}

/* ========================================
   セクション
   ======================================== */

.section {
  padding: var(--spacing-xxl) 0;
}

.section-title {
  margin-bottom: var(--spacing-xl);
  font-size: 1.625rem;
  text-align: center;
}

.section-title::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  margin: var(--spacing-md) auto 0;
  background-color: var(--color-primary);
}

.section--gray {
  background-color: var(--color-bg-light);
}

/* ========================================
   グリッド
   ======================================== */

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid--2 {
  grid-template-columns: 1fr;
}

.grid--3 {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========================================
   フッター
   ======================================== */

.site-footer {
  background-color: var(--color-bg-dark);
  color: var(--color-bg);
  padding: var(--spacing-xl) 0;
}

.site-footer .container {
  max-width: 1400px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  text-align: center;
}

.footer-info {
  font-size: 1rem;
  font-weight: 700;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
}

.footer-nav a {
  color: var(--color-bg);
  font-size: 0.875rem;
}

.footer-nav a:hover {
  color: var(--color-primary-light);
  text-decoration: underline;
}

.footer-sns {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

.footer-sns a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-bg);
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  font-size: 0.875rem;
  transition: background-color var(--transition-fast);
}

.footer-sns a:hover {
  background-color: var(--color-primary);
  text-decoration: none;
}

.footer-copyright {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-md);
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    text-align: left;
  }
}

/* ========================================
   ページヘッダー
   ======================================== */

.page-header {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-bg-light);
  text-align: center;
}

.page-header-title {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-sm);
}

.page-header-description {
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* ========================================
   2カラムレイアウト
   ======================================== */

.layout-2col {
  display: grid;
  gap: var(--spacing-xl);
}

@media (min-width: 768px) {
  .layout-2col {
    grid-template-columns: 2fr 1fr;
  }
}

.sidebar {
  order: -1;
}

@media (min-width: 768px) {
  .sidebar {
    order: 1;
  }
}