/**
 * Site Header — Shared site container + two-tier header (utility strip + main bar).
 * Theme-token driven; constant height on scroll (no layout shift).
 */

/* ============================================
   SITE CONTAINER — Shared gutters & max-width
   ============================================ */
:root {
    --site-container-max: 1280px;
    --site-gutter-x: 24px;
    --site-gutter-x-sm: 32px;
    --site-gutter-x-lg: 40px;
    --header-bar-min-height: 4.5rem;
    --header-utility-height: 2.25rem;
    --scroll-margin-header: var(--header-bar-min-height);
}
@media (min-width: 768px) {
    :root {
        --scroll-margin-header: calc(var(--header-utility-height) + var(--header-bar-min-height));
    }
}
@media (min-width: 640px) {
    :root { --site-gutter-x: var(--site-gutter-x-sm); }
}
@media (min-width: 1024px) {
    :root { --site-gutter-x: var(--site-gutter-x-lg); }
}

.site-container {
    max-width: var(--site-container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--site-gutter-x);
    padding-right: var(--site-gutter-x);
}

/* ============================================
   SITE HEADER — Wrapper & Utility Strip
   Constant height: no scroll-triggered height change.
   ============================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    overflow: visible;
    padding: 0;
    background: var(--theme-background, #f8fafc);
}

.site-header__utility {
    display: none;
    background: var(--theme-background-alt, #f8fafc);
    border-bottom: 1px solid var(--theme-border, #e2e8f0);
    min-height: var(--header-utility-height);
}
@media (min-width: 768px) {
    .site-header__utility { display: flex; align-items: center; }
}
.site-header__utility-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 32px;
    min-height: var(--header-utility-height);
    max-width: var(--site-container-max);
    margin: 0 auto;
    width: 100%;
    padding-left: var(--site-gutter-x);
    padding-right: var(--site-gutter-x);
}
@media (min-width: 640px) {
    .site-header__utility-inner {
        padding-left: var(--site-gutter-x-sm);
        padding-right: var(--site-gutter-x-sm);
    }
}
@media (min-width: 1024px) {
    .site-header__utility-inner {
        padding-left: var(--site-gutter-x-lg);
        padding-right: var(--site-gutter-x-lg);
    }
}
.site-header__utility-left,
.site-header__utility-right {
    display: flex;
    align-items: center;
    gap: 24px;
}
.site-header__utility-item {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--theme-text, #334155);
    line-height: 1.4;
}
.site-header__utility-phone {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    min-height: 44px;
    padding: 0 8px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--theme-text, #334155);
    text-decoration: none;
    transition: color 0.2s ease, text-decoration-color 0.2s ease;
}
.site-header__utility-phone:hover {
    color: var(--theme-primary);
    text-decoration: underline;
    text-underline-offset: 4px;
}
.site-header__utility-icon {
    font-size: 11px;
    color: var(--theme-text, #64748b);
    opacity: 0.9;
    flex-shrink: 0;
}

/* ============================================
   MAIN BAR — Floating card; height constant (no scroll change)
   ============================================ */
.site-header__bar {
    position: relative;
    z-index: 50;
    isolation: isolate;
    width: 100%;
    min-height: var(--header-bar-min-height);
    display: flex;
    align-items: center;
    overflow: visible;
    background: var(--theme-header-background, #ffffff);
    border-bottom: 1px solid var(--theme-header-border, rgba(0,0,0,0.06));
    box-shadow: 0 2px 8px rgba(0,0,0,0.04), 0 8px 32px -8px rgba(0,0,0,0.08);
    transition: box-shadow 0.3s ease;
}
.site-header__bar--scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.08), 0 12px 40px -12px rgba(0,0,0,0.12);
}

.site-header__bar-inner {
    width: 100%;
    max-width: var(--site-container-max);
    margin: 0 auto;
    padding: 0 var(--site-gutter-x);
    overflow-x: visible;
}
@media (min-width: 640px) { .site-header__bar-inner { padding: 0 var(--site-gutter-x-sm); } }
@media (min-width: 1024px) { .site-header__bar-inner { padding: 0 var(--site-gutter-x-lg); } }

.site-header__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: 24px;
    min-height: var(--header-bar-min-height);
}
@media (min-width: 1024px) {
    .site-header__grid--nav-right {
        grid-template-columns: minmax(0, 1fr) auto auto;
    }
}
@media (max-width: 1023px) {
    .site-header__grid {
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 12px;
    }
    .site-header__nav,
    .site-header__nav-spacer {
        display: none !important;
    }
    .site-header__bar-inner {
        padding-left: 16px;
        padding-right: 16px;
    }
}

/* ============================================
   LOGO
   ============================================ */
.site-header__logo {
    font-family: var(--theme-font-primary, 'Noto Sans JP', sans-serif);
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--theme-logo-text-color, var(--theme-heading, #0f172a));
    text-decoration: none;
    transition: opacity 0.2s ease;
    min-width: 0;
    max-width: 100%;
}
.site-header__logo:hover { opacity: 0.85; }
.site-header__logo--text {
    font-size: clamp(14px, 4vw, 20px);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
@media (max-width: 1023px) {
    .site-header__logo {
        max-width: min(55vw, 220px);
    }
    .site-header__logo--text {
        font-size: clamp(13px, 3.5vw, 18px);
    }
}
@media (min-width: 768px) {
    .site-header__logo { font-size: 20px; }
    .site-header__logo--text { font-size: clamp(16px, 4vw, 20px); }
}
@media (min-width: 1024px) {
    .site-header__logo { max-width: none; }
}
.site-header__logo-img {
    display: block;
    max-height: 40px;
    max-width: 100%;
    width: auto;
    object-fit: contain;
}
@media (min-width: 768px) {
    .site-header__logo-img { max-height: 44px; }
}

/* ============================================
   NAV LINKS (centered, generous spacing)
   ============================================ */
.site-header__nav {
    display: flex;
    justify-content: center;
    align-items: center;
    min-width: 0;
}
.site-header__nav--right {
    justify-content: flex-end;
}
.site-header__nav--right .site-header__links {
    gap: 16px;
}
.site-header__nav-spacer {
    display: block;
    min-width: 0;
    flex: 0 0 auto;
}
.site-header__links {
    display: none;
    align-items: center;
    gap: 40px;
}
@media (min-width: 1024px) {
    .site-header__links { display: flex; }
}
@media (min-width: 1280px) {
    .site-header__links { gap: 48px; }
}

.site-header__nav-link {
    position: relative;
    font-size: 12.5px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--theme-header-link, var(--theme-header-text, #475569));
    text-decoration: none;
    padding: 4px 0;
    white-space: nowrap;
    transition: color 0.25s ease;
}
.site-header__nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 2px;
    background: var(--theme-primary);
    border-radius: 1px;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.site-header__nav-link:hover {
    color: var(--theme-header-link-hover, var(--theme-primary)) !important;
}
.site-header__nav-link:hover::after {
    width: 100%;
}
.site-header__nav-link--active {
    color: var(--theme-primary) !important;
    font-weight: 600;
}
.site-header__nav-link--active::after {
    width: 100%;
}

/* ============================================
   ACTIONS (MyPage, WEB予約, hamburger)
   ============================================ */
.site-header__actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    min-width: 0;
    flex-shrink: 0;
    overflow: visible;
}
@media (min-width: 640px) { .site-header__actions { gap: 12px; } }
@media (max-width: 480px) {
    .site-header__grid { gap: 12px; }
    .site-header__actions { gap: 6px; }
}

.site-header__phone-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    min-height: 44px;
    flex-shrink: 0;
    border-radius: 8px;
    font-size: 15px;
    color: var(--theme-header-text, #475569);
    background: transparent;
    border: 1px solid rgba(0, 0, 0, 0.08);
    text-decoration: none;
    transition: all 0.2s ease;
}
.site-header__phone-btn:hover {
    background: var(--theme-background-alt, #f8fafc);
    border-color: var(--theme-border, #e2e8f0);
    color: var(--theme-primary);
}
.site-header__phone-btn:focus-visible {
    outline: 2px solid var(--theme-primary);
    outline-offset: 2px;
}
@media (min-width: 1024px) {
    .site-header__phone-btn { display: none; }
}
@media (max-width: 1023px) {
    .site-header__phone-btn,
    .site-header__dropdown-container {
        display: none !important;
    }
}

.site-header__mypage-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    min-height: 44px;
    flex-shrink: 0;
    font-size: 12.5px;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--theme-header-text, #475569);
    background: transparent;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}
.site-header__mypage-btn:hover {
    background: var(--theme-background-alt, #f8fafc);
    border-color: var(--theme-border, #e2e8f0);
    color: var(--theme-primary);
}
.site-header__mypage-btn:focus-visible {
    outline: 2px solid var(--theme-primary);
    outline-offset: 2px;
}
.site-header__mypage-btn i { font-size: 14px; }
.site-header__mypage-label { display: none; }
@media (min-width: 640px) { .site-header__mypage-label { display: inline; } }
.site-header__mypage-caret {
    flex-shrink: 0;
    width: 14px;
    height: 8px;
    transition: transform 0.2s ease;
    display: none;
}
@media (min-width: 640px) { .site-header__mypage-caret { display: block; } }

.site-header__mypage-icon-wrap {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.site-header__inbox-badge {
    min-width: 1.125rem;
    height: 1.125rem;
    padding: 0 0.25rem;
    font-size: 0.625rem;
    font-weight: 700;
    line-height: 1.125rem;
    text-align: center;
    border-radius: 9999px;
    background: var(--theme-error, #dc2626);
    color: #fff;
    flex-shrink: 0;
}
.site-header__mypage-btn .site-header__inbox-badge {
    position: absolute;
    top: -0.375rem;
    right: -0.5rem;
}
.site-header__inbox-badge--dropdown {
    margin-left: auto;
}
.site-header__inbox-badge--mobile {
    margin-left: 0.5rem;
}

.site-header__dropdown-container {
    position: relative;
}
.site-header__dropdown {
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    width: 260px;
    background: var(--theme-card-background, #ffffff);
    border: 1px solid var(--theme-border, rgba(0,0,0,0.08));
    border-radius: 12px;
    box-shadow: 0 12px 40px -8px rgba(0,0,0,0.12), 0 4px 12px -4px rgba(0,0,0,0.06);
    padding: 6px 0;
    z-index: 60;
    opacity: 0;
    transform: translateY(-4px) scale(0.98);
    transition: opacity 0.2s ease, transform 0.2s ease;
    overflow: visible;
}
.site-header__dropdown.is-open {
    opacity: 1;
    transform: translateY(0) scale(1);
}
.site-header__dropdown.is-flipped {
    top: auto;
    bottom: calc(100% + 10px);
}
.site-header__dropdown-header {
    display: flex;
    flex-direction: column;
    padding: 14px 18px 12px;
}
.site-header__dropdown-greeting {
    font-size: 11px;
    color: var(--theme-text-light, #94a3b8);
    letter-spacing: 0.04em;
}
.site-header__dropdown-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--theme-text, #0f172a);
    margin-top: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.site-header__dropdown-divider {
    height: 1px;
    margin: 4px 0;
    background: var(--theme-border, #f1f5f9);
}
.site-header__dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 18px;
    font-size: 13px;
    font-weight: 500;
    color: var(--theme-text, #334155);
    text-decoration: none;
    transition: all 0.15s ease;
    border-left: 3px solid transparent;
}
.site-header__dropdown-item i {
    width: 18px;
    text-align: center;
    font-size: 14px;
    color: var(--theme-text-light, #94a3b8);
    transition: color 0.15s ease;
}
.site-header__dropdown-item:hover,
.site-header__dropdown-item:focus-visible {
    background: var(--theme-background-alt, #f8fafc);
    color: var(--theme-primary);
    outline: none;
}
.site-header__dropdown-item:hover i,
.site-header__dropdown-item:focus-visible i {
    color: var(--theme-primary);
}
.site-header__dropdown-item--danger {
    color: var(--theme-error, #dc2626);
}
.site-header__dropdown-item--danger i { color: var(--theme-error, #dc2626); }
.site-header__dropdown-item--danger:hover {
    background: rgba(220, 38, 38, 0.06);
    color: var(--theme-error, #dc2626);
}

.site-header__hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    min-width: 44px;
    height: 44px;
    flex-shrink: 0;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
}
@media (max-width: 1023px) {
    .site-header__hamburger { display: flex; }
}
.site-header__hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--theme-header-text, #334155);
    border-radius: 2px;
    transition: all 0.3s ease;
}
.site-header__hamburger[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.site-header__hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.site-header__hamburger[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}
.site-header__hamburger:focus-visible {
    outline: 2px solid var(--theme-primary);
    outline-offset: 2px;
    border-radius: 6px;
}

/* ============================================
   MOBILE PANEL
   ============================================ */
.site-header__mobile {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 0;
    z-index: 60;
    border-radius: 0 0 12px 12px;
    border: 1px solid var(--theme-border, #e2e8f0);
    border-top: none;
    background: var(--theme-card-background, #fff);
    box-shadow: 0 12px 40px -8px rgba(0,0,0,0.12);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, opacity 0.25s ease;
    opacity: 0;
}
.site-header__mobile.is-open {
    display: block !important;
    max-height: calc(100vh - var(--header-bar-min-height) - var(--header-utility-height));
    opacity: 1;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    visibility: visible;
}
@media (max-width: 767px) {
    .site-header__mobile.is-open {
        max-height: calc(100vh - var(--header-bar-min-height));
        max-height: calc(100dvh - var(--header-bar-min-height));
    }
}
.site-header__mobile-inner {
    padding: 16px 20px 24px;
}
.site-header__mobile-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    margin: 0 0 16px;
    padding: 14px 20px;
    min-height: 48px;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-decoration: none;
    border-radius: 10px;
    border: none;
    background-color: var(--theme-button-primary, var(--theme-primary, #2563eb)) !important;
    color: var(--theme-button-text, #fff) !important;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15), 0 4px 12px -4px rgba(0,0,0,0.1);
    transition: all 0.25s ease;
}
.site-header__mobile-cta:hover {
    background-color: var(--theme-button-primary-hover, var(--theme-primary-hover)) !important;
    color: var(--theme-button-text, #fff) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px -2px rgba(0,0,0,0.18), 0 2px 6px -2px rgba(0,0,0,0.1);
}
.site-header__mobile-cta:focus-visible {
    outline: 2px solid var(--theme-primary);
    outline-offset: 2px;
}
.site-header__mobile-nav {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--theme-border, rgba(0,0,0,0.06));
}
.site-header__mobile-nav .site-header__mobile-link:first-child {
    border-top: none;
}
.site-header__mobile-link {
    display: flex;
    align-items: center;
    padding: 14px 12px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--theme-text, #0f172a);
    text-decoration: none;
    border-bottom: 1px solid var(--theme-border, rgba(0,0,0,0.04));
    transition: color 0.2s ease;
}
.site-header__mobile-link:last-of-type { border-bottom: none; }
.site-header__mobile-link:hover { color: var(--theme-primary); }
.site-header__mobile-link--active {
    color: var(--theme-primary) !important;
}
.site-header__mobile-link i {
    width: 1.25rem;
    text-align: center;
    margin-right: 0.5rem;
    color: var(--theme-text-light, #64748b);
}
.site-header__mobile-link--danger {
    color: var(--theme-error, #dc2626) !important;
}
.site-header__mobile-link--danger i {
    color: var(--theme-error, #dc2626);
}
.site-header__mobile-link--sub {
    padding-left: 2.5rem;
    font-size: 13px;
    font-weight: 500;
}
.site-header__mobile-link--sub i {
    width: 1rem;
    font-size: 12px;
}
.site-header__mobile-mypage-wrap {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--theme-border, rgba(0,0,0,0.06));
}
.site-header__mobile-mypage-wrap .site-header__mobile-link {
    display: flex;
    align-items: center;
}
.site-header__mobile-contact-wrap {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--theme-border, #e2e8f0);
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.site-header__mobile-phone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 14px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--theme-primary);
    background: var(--theme-background-alt, #f8fafc);
    border: 1px solid var(--theme-border, #e2e8f0);
    border-radius: 10px;
    text-decoration: none;
    transition: all 0.2s ease;
}
.site-header__mobile-phone:hover {
    background: var(--theme-primary);
    color: #fff;
    border-color: var(--theme-primary);
}
.site-header__mobile-address {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 10px;
    font-size: 13px;
    font-weight: 500;
    color: var(--theme-text, #334155);
    letter-spacing: 0.02em;
    line-height: 1.5;
}
.site-header__mobile-contact-wrap .site-header__utility-icon {
    flex-shrink: 0;
    margin-top: 2px;
}

/* Align modern-container with site container */
.modern-container {
    max-width: var(--site-container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--site-gutter-x);
    padding-right: var(--site-gutter-x);
}

/* Scroll-margin so anchor targets are not hidden under sticky header */
[id] {
    scroll-margin-top: var(--scroll-margin-header);
}

.hidden { display: none !important; }