/* ===========================================
           ヘッダーメイン
        =========================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(var(--header-blur));
  -webkit-backdrop-filter: blur(var(--header-blur));
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: var(--shadow-xs);
  z-index: 100;
  transition: box-shadow var(--header-transition);
  line-height: 1.15;
}

.header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--space-sm);
}

.header__right{
  display: flex;
  flex-direction: row;
    gap: var(--space-xs);
}

/* ===========================================
           ロゴエリア
        =========================================== */
.header__logo {
  flex-shrink: 0;
  max-width: 140px;
}

.header__logo img {
  height: 36px;
  width: auto;
  object-fit: contain;
}

/* ===========================================
           アクションエリア
        =========================================== */

.header__actions {
  display: flex;
  align-items: center;
  height: 100%;
}

.header__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-bottom: var(--space-xs);
}

.header__txt {
  font-size: var(--font-sm);
  font-weight: var(--font-mid);
  white-space: nowrap;
}

.header__icon-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  height:var(--touch-target-min);
  min-width: var(--touch-target-min);
  padding: var(--space-xs);
  border-radius:2px;
  color: var(--color-black);
}

.header__icon-btn:hover {
  background-color: var(--color-gray-100);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* ===========================================
           ハンバーガーメニュー 
=========================================== */

.hamburger {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: var(--touch-target-min);
  height: 44px;
  background: none;
  border: none;
  padding: var(--space-xs);
  z-index: 101;
  border-radius: 2px;
  cursor: pointer;
  align-items: center;
  transition: background-color var(--transition-fast);
}

.hamburger:focus,
.hamburger:focus-visible {
  outline: none; /* デフォルトの青枠を消す */
  position: relative;
}

.hamburger:focus::before,
.hamburger:focus-visible::before {
  content: '';
  position: absolute;
  top: -8px;
  left: -6px;
  right: -6px;
  bottom: -8px;
  border: 2px solid var(--color-primary);
  border-radius: 4px;
  pointer-events: none;
}

.hamburger:hover {
  background-color: var(--color-gray-100);
}

.hamburger:active {
  background-color: var(--color-gray-300);
  z-index: 101; 
}

.hamburger .hamburger__line {
  width: 24px;
  height: 3px;
  background-color: var(--color-gray-700) !important;
  border-radius: 2px;
  transition: all var(--transition-base) var(--animation-smooth);
  transform-origin: center;
  position: relative;
}

/* ハンバーガーアイコンの変形アニメーション */
.hamburger.active .hamburger__line:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.hamburger.active .hamburger__line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.active .hamburger__line:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}



/* ===========================================
           モバイルナビゲーション 
=========================================== */
.header__nav {
  position: fixed;
  display: none;
  top: var(--header-height);
  right: -100%;
  width: 100%;
  max-width: 320px;
  height: calc(100vh - var(--header-height));
  background-color: var(--color-white);
  box-shadow: var(--shadow-lg);
  transition: right var(--transition-base) var(--animation-smooth);
  z-index: 999;
  overflow-y: auto;
  border-left: 1px solid var(--color-gray-300);
  pointer-events: none;
}

.header__nav.active {
  display: block;
  pointer-events: auto;
  right: 0;
}

.header__nav ul {
  list-style: none;
  padding: var(--space-lg) 0;
  flex-wrap: nowrap;
}

.header__nav li {
  margin: 0;
  border-bottom: 1px solid var(--color-gray-100);
}

.header__nav li:last-child {
  border-bottom: none;
}


.header__nav a {
  display: block;
  padding: var(--space-md) var(--space-lg);
  text-decoration: none;
  color: var(--color-black);
  font-size: var(--font-body);
  font-weight: var(--font-mid);
  transition: all var(--transition-fast);
  position: relative;
}

.header__nav a:hover {
  background-color: var(--color-light-blue);
  color: var(--color-secondary);
  padding-left: calc(var(--space-lg) + var(--space-xs));
}

.header__nav a:focus-visible {
  outline: var(--focus-visible);
  outline-offset: -2px;
  background-color: var(--color-light-blue);
}

.header__nav a:active {
  background-color: var(--color-primary);
  color: var(--color-white);
  transform: translateX(var(--active-translate));
   z-index: 100; /* overlay より上 */
}

.login-menu{
  background-color: var(--color-gray-300);
  color: #fff;
}

.logout-menu{
  background-color: var(--color-primary);
  color: #fff;
}

.logout-menu a {
  color: #fff;
}

/* ===========================================
           オーバーレイ
        =========================================== */
.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: 99;
  transition: opacity 0.3s, visibility 0.3s;
}

.overlay.active {
  display: block;
  opacity: 1;
  visibility: visible;
  pointer-events: auto; 
}


/* ===========================================
           レスポンシブ対応
        =========================================== */
@media (min-width: 768px) {
  .header__logo {
    max-width: 200px;
  }

  .header__nav {
    max-width: 400px;
  }
}

@media (min-width: 1180px) {
  .hamburger {
    display: none;
  }

  .header__inner {
    padding: 0;
    padding-left: var(--space-sm);
  }

  .header__icon-btn{
    height: var(--header-height);
    background-color: var(--color-light-blue);
    padding: var(--space-sm);
  }

    .header__icon-btn:hover{
    background-color: var(--color-primary);
    color: white;
  }

  .header__nav {
    position: static;
    width: auto;
    height: auto;
    background: none;
    box-shadow: none;
    border: none;
    display: flex; 
    align-items: center;
    overflow-y: visible;
    max-width: none;
    pointer-events: auto;
  }

  .header__nav ul {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    white-space: nowrap;
    padding: 0;
    margin: 0;
    flex-wrap: nowrap;
  }

  .header__nav li {
    border: none;
    margin: 0;
    flex-shrink: 0;
  }

  .header__nav a {
    padding: var(--space-sm) var(--space-sm);
    border-radius: var(--space-xs);
    background-color: transparent;
    border-radius: 0;
    white-space: nowrap;
  }

  /* PCサイズでのホバー時のpadding調整 */
  .header__nav a:hover {
    padding-left: var(--space-sm);
    background-color: var(--color-light-blue); 
    color: var(--color-secondary);
  }

  .header__right {
    flex-shrink: 0; 
    gap: var(--space-md); 
  }

  .login-menu{
      display: none;
}
}

/* ===========================================
           アクセシビリティ対応
        =========================================== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* スクリーンリーダー用の隠しテキスト */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* フォーカス管理 */
body.menu-open {
  overflow: hidden;
}