/* ============================================================
   assets/css/navigation.css
   固定フッターナビゲーション・ハンバーガーメニュー
   ============================================================ */

/* ============================================================
   固定フッターナビゲーション（スマホ専用）
   ============================================================ */

.footer-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 200;
    height: var(--nav-height-mobile);
    background-color: var(--color-base);
    border-top: var(--border-width) solid var(--color-border);
    padding-bottom: env(safe-area-inset-bottom);
}

.footer-nav__list {
    display: flex;
    height: 100%;
    align-items: stretch;
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-nav__item {
    flex: 1;
    display: flex;
    align-items: stretch;
}

.footer-nav__link {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: var(--space-1) var(--space-2);
    color: var(--color-text-lighter);
    font-size: var(--font-size-xs);
    letter-spacing: 0.03em;
    text-decoration: none;
    transition: color var(--transition-fast);
    min-height: 44px;
    position: relative;
}

.footer-nav__link:hover,
.footer-nav__link.is-active {
    color: var(--color-text);
    opacity: 1;
}

.footer-nav__link.is-active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 0 0 2px 2px;
}

.footer-nav__icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.footer-nav__icon svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.footer-nav__text {
    font-size: 9px;
    letter-spacing: 0.04em;
    font-weight: 500;
    line-height: 1;
}

.footer-nav__hamburger {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: var(--space-1) var(--space-2);
    color: var(--color-text-lighter);
    cursor: pointer;
    min-height: 44px;
    border: none;
    background: transparent;
}

.footer-nav__hamburger.is-open {
    color: var(--color-text);
}

@media ( min-width: 768px ) {
    .footer-nav {
        display: none;
    }
    body {
        padding-bottom: 0;
    }
}

/* ============================================================
   PC用ヘッダーハンバーガーボタン
   ============================================================ */

.header-hamburger {
    display: none;
    width: 40px;
    height: 40px;
    color: var(--color-text);
    cursor: pointer;
    background: transparent;
    border: none;
    transition: opacity var(--transition-fast);
}

.header-hamburger:hover {
    opacity: 0.6;
}

.header-hamburger svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
}

@media ( min-width: 768px ) {
    .header-hamburger {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* ============================================================
   ハンバーガーメニュー（スライドイン）
   ============================================================ */

.hamburger-menu {
    position: fixed;
    inset: 0;
    z-index: 300;
    background-color: var(--color-base);
    display: flex;
    flex-direction: column;
    
    /* 初期状態：右側画面外に配置 */
    visibility: hidden;
    transform: translateX(100%);
    /* イージングで「最初はスッと、最後はゆっくり」心地よいスライドを実現 */
    transition: 
        transform 0.5s cubic-bezier(0.16, 1, 0.3, 1),
        visibility 0.5s;
        
    padding-bottom: calc( var(--nav-height-mobile) + env(safe-area-inset-bottom) );
}

.hamburger-menu.is-open {
    visibility: visible;
    transform: translateX(0);
}

.hamburger-menu__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--container-padding);
    border-bottom: var(--border-width) solid var(--color-border);
}

.hamburger-menu__title {
    font-size: var(--font-size-xs);
    font-weight: 500;
    letter-spacing: var(--letter-spacing-wider);
    color: var(--color-text-lighter);
    text-transform: uppercase;
}

.hamburger-menu__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    color: var(--color-text);
    cursor: pointer;
    transition: opacity var(--transition-fast);
    background: transparent;
    border: none;
}

.hamburger-menu__close:hover {
    opacity: 0.6;
}

.hamburger-menu__close svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
}

.hamburger-menu__list {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: var(--space-4) 0;
    list-style: none;
    margin: 0;
}

/* メニュー項目のアニメーション初期状態 */
.hamburger-menu__item {
    opacity: 0;
    transform: translateX(24px); /* 親のスライドに合わせて右から左へ動かす */
    transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* メニューが開いた時の状態 */
.hamburger-menu.is-open .hamburger-menu__item {
    opacity: 1;
    transform: translateX(0);
}

/* 各項目の時間差（スタッガード）アニメーション設定 */
/* 親要素のスライドに自然に追従するようディレイを調整 */
.hamburger-menu.is-open .hamburger-menu__item:nth-child(1) { transition-delay: 0.15s; }
.hamburger-menu.is-open .hamburger-menu__item:nth-child(2) { transition-delay: 0.20s; }
.hamburger-menu.is-open .hamburger-menu__item:nth-child(3) { transition-delay: 0.25s; }
.hamburger-menu.is-open .hamburger-menu__item:nth-child(4) { transition-delay: 0.30s; }
.hamburger-menu.is-open .hamburger-menu__item:nth-child(5) { transition-delay: 0.35s; }
.hamburger-menu.is-open .hamburger-menu__item:nth-child(6) { transition-delay: 0.40s; }
.hamburger-menu.is-open .hamburger-menu__item:nth-child(7) { transition-delay: 0.45s; }
.hamburger-menu.is-open .hamburger-menu__item:nth-child(8) { transition-delay: 0.50s; }
.hamburger-menu.is-open .hamburger-menu__item:nth-child(9) { transition-delay: 0.55s; }
.hamburger-menu.is-open .hamburger-menu__item:nth-child(10){ transition-delay: 0.60s; }

.hamburger-menu__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--container-padding);
    font-size: var(--font-size-base);
    font-weight: 400;
    letter-spacing: var(--letter-spacing-wide);
    color: var(--color-text);
    transition: opacity var(--transition-fast), padding-left var(--transition-base);
    text-decoration: none;
}

.hamburger-menu__link:hover {
    background-color: transparent;
    padding-left: calc(var(--container-padding) + 8px);
    opacity: 0.6;
}

.hamburger-menu__link-arrow {
    width: 14px;
    height: 14px;
    color: var(--color-text-lighter);
    flex-shrink: 0;
}

.hamburger-menu__link-arrow svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
}

/* メニュー下部のフッター要素アニメーション */
.hamburger-menu__footer {
    padding: var(--space-6) var(--container-padding);
    border-top: var(--border-width) solid var(--color-border);
    opacity: 0;
    transform: translateX(24px);
    transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.hamburger-menu.is-open .hamburger-menu__footer {
    opacity: 1;
    transform: translateX(0);
    transition-delay: 0.45s;
}

.hamburger-menu__social {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.hamburger-menu__social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: var(--border-width) solid var(--color-border);
    border-radius: 50%;
    color: var(--color-text-light);
    transition: border-color var(--transition-fast), color var(--transition-fast);
    text-decoration: none;
}

.hamburger-menu__social-link:hover {
    border-color: var(--color-text);
    color: var(--color-text);
    opacity: 1;
}

.hamburger-menu__social-link svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
}

.hamburger-menu__phone {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text);
    letter-spacing: 0.04em;
    text-decoration: none;
}

.hamburger-menu__phone svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
}

/* PC時の調整（右側スライドインのドロワー化） */
@media ( min-width: 768px ) {
    .hamburger-menu {
        left: auto;
        right: 0;
        width: 340px;
        border-left: var(--border-width) solid var(--color-border);
        box-shadow: -8px 0 32px rgba(0, 0, 0, 0.08);
        padding-bottom: 0;
    }
}