/* ==========================================================================
   Header — SALT式ミニマル
   ========================================================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: transparent;
    transition: background-color var(--transition-base), border-color var(--transition-base);
}

.site-header.is-scrolled {
    background-color: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
}

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

/* Right side: nav + CTA + hamburger grouped together */
.site-header__right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.site-header__logo {
    display: flex;
    align-items: center;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 0.05em;
}

.site-header__logo-img {
    height: 36px;
    width: auto;
}

.site-header__logo:hover {
    color: var(--color-primary);
}

/* Navigation — 英字・Poppins */
.site-nav__list {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    white-space: nowrap;
}

.site-nav__list li a {
    font-family: var(--font-heading-en);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    position: relative;
    padding: 0.25rem 0;
}

.site-nav__list li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

.site-nav__list li a:hover {
    color: var(--color-primary);
}

.site-nav__list li a:hover::after {
    width: 100%;
}

.site-nav__list li.current-menu-item > a {
    color: var(--color-primary);
}

.site-nav__list li.current-menu-item > a::after {
    width: 100%;
}

.site-nav__cta--mobile {
    display: none;
}

.site-header__cta {
    font-size: var(--font-size-sm);
    padding: 0.5rem 1.5rem;
}

/* Hamburger toggle */
.site-header__toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    color: var(--color-accent);
}

.site-header__toggle-icon--close {
    display: none;
}

.site-header__hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 24px;
    height: 24px;
}

.site-header__hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: currentColor;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.menu-open .site-header__hamburger span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-open .site-header__hamburger span:nth-child(2) {
    opacity: 0;
}

.menu-open .site-header__hamburger span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   Footer — 3カラム、ネイビー背景
   ========================================================================== */
.site-footer {
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
}

.site-footer__inner {
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: start;
    gap: var(--spacing-2xl);
    padding-top: var(--spacing-3xl);
    padding-bottom: var(--spacing-2xl);
    max-width: var(--container-max);
    margin: 0 auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

.site-footer__logo {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text-inverse);
}

.site-footer__logo-img {
    height: 36px;
    width: auto;
    transition: opacity var(--transition-base);
}

.site-footer__logo:hover .site-footer__logo-img {
    opacity: 0.8;
}

.site-footer__tagline {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    opacity: 0.6;
}

.site-footer__menu {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.site-footer__menu li a {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-base);
}

.site-footer__menu li a:hover {
    color: var(--color-text-inverse);
}

.site-footer__social {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.site-footer__social-link {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-base);
}

.site-footer__social-link:hover {
    color: var(--color-text-inverse);
}

.site-footer__social-heading {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-inverse);
    margin-bottom: var(--spacing-xs);
}

.site-footer__social-addr {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 0.25rem;
}

.site-footer__social-addr a {
    color: rgba(255, 255, 255, 0.6);
}

.site-footer__social-addr a:hover {
    color: var(--color-text-inverse);
}

.site-footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md) 0;
}

.site-footer__bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.site-footer__copyright {
    font-size: var(--font-size-sm);
    opacity: 0.5;
}

.site-footer__legal {
    display: flex;
    gap: var(--spacing-md);
}

.site-footer__legal a {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
}

.site-footer__legal a:hover {
    color: var(--color-text-inverse);
}

/* ==========================================================================
   Card Component — box-shadow なし、border のみ
   ========================================================================== */
.card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color var(--transition-base);
}

.card:hover {
    border-color: var(--color-primary);
}

.card__image {
    width: 100%;
    aspect-ratio: 3/2;
    object-fit: cover;
}

.card__body {
    padding: var(--spacing-lg);
}

.card__title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.card__text {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* ==========================================================================
   Responsive — Mobile
   ========================================================================== */
@media (max-width: 768px) {
    :root {
        --spacing-section: 5rem;
        --font-size-2xl: 1.625rem;
        --font-size-3xl: 2rem;
        --font-size-4xl: 2.25rem;
    }

    /* Mobile nav */
    .site-header__toggle {
        display: flex;
    }

    .site-header__cta {
        display: none;
    }

    .site-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--color-bg);
        padding: var(--spacing-lg) var(--spacing-md);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        overflow-y: auto;
        z-index: 999;
    }

    .site-nav.is-open {
        transform: translateX(0);
    }

    .site-nav__list {
        flex-direction: column;
        gap: 0;
        align-items: center;
    }

    .site-nav__list li a {
        display: block;
        padding: var(--spacing-sm) 0;
        font-size: var(--font-size-lg);
        border-bottom: 1px solid var(--color-border);
        text-align: center;
        width: 100%;
    }

    .site-nav__list li a::after {
        display: none;
    }

    .site-nav__cta--mobile {
        display: block;
        margin-top: var(--spacing-lg);
        text-align: center;
    }

    .site-nav__cta--mobile .btn {
        display: block;
        width: 100%;
    }

    /* Mobile toggle state */
    .menu-open .site-header__toggle-icon {
        display: none;
    }
    .menu-open .site-header__toggle-icon--close {
        display: block;
    }

    /* Footer mobile */
    .site-footer__inner {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .site-footer__social {
        align-items: center;
    }

    .site-footer__bottom-inner {
        flex-direction: column;
        text-align: center;
    }

    .site-footer__legal {
        justify-content: center;
    }
}

/* ==========================================================================
   Body offset for fixed header
   ========================================================================== */
body {
    padding-top: var(--header-height);
}

/* WP admin bar offset */
body.admin-bar .site-header {
    top: 32px;
}

@media (max-width: 782px) {
    body.admin-bar .site-header {
        top: 46px;
    }
}