.nav-wavy-line {
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 3px;
    background-image: url("data:image/svg+xml,%3Csvg width='40' height='10' viewBox='0 0 40 10' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 5 Q 10 0, 20 5 T 40 5' stroke='%23F8A01A' stroke-width='2' fill='none'/%3E%3C/svg%3E");
    background-repeat: repeat-x;
    opacity: 0;
    transition: opacity 0.3s;
}

.group:hover .nav-wavy-line {
    opacity: 1;
}

#mobile-nav-overlay {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100dvh;
    z-index: 150;
    background-color: #FFFFFF;
    overflow-y: auto;
    overscroll-behavior-y: contain;
    -webkit-overflow-scrolling: touch;
    visibility: hidden;
    opacity: 0;
    transition:
        opacity 0.5s cubic-bezier(0.65, 0, 0.35, 1),
        visibility 0.5s cubic-bezier(0.65, 0, 0.35, 1);
}

#mobile-nav-overlay.is-active {
    visibility: visible;
    opacity: 1;
}

#menu-toggle {
    position: relative;
    width: 48px;
    height: 48px;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.5s cubic-bezier(0.65, 0, 0.35, 1);
    border-radius: 9999px;
}

.menu-open-state#menu-toggle {
    background-color: #F8A01A;
    box-shadow: 0 4px 15px rgba(248, 160, 26, 0.4);
}

.hamburger-span {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 2px;
    background-color: #1A2D54;
    transform-origin: center;
    transition: all 0.5s cubic-bezier(0.65, 0, 0.35, 1);
}

.hamburger-span:nth-child(1) {
    transform: translate(-50%, -9px);
}

.hamburger-span:nth-child(2) {
    transform: translate(-50%, -50%);
}

.hamburger-span:nth-child(3) {
    transform: translate(-50%, 7px);
}

.menu-open-state .hamburger-span {
    background-color: #FFFFFF;
}

.menu-open-state .hamburger-span:nth-child(1) {
    transform: translate(-50%, -50%) rotate(45deg);
}

.menu-open-state .hamburger-span:nth-child(2) {
    opacity: 0;
    transform: translate(-50%, -50%) scaleX(0);
}

.menu-open-state .hamburger-span:nth-child(3) {
    transform: translate(-50%, -50%) rotate(-45deg);
}

.mobile-line-btn {
    background-image: url('/img/top/line_btn_watercolor-delivery.webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    aspect-ratio: 4 / 1;
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(34, 197, 94, 0.1);
    padding-left: 28%;
}

body.menu-open {
    overflow: hidden;
}

@media (min-width: 768px) and (max-width: 1119px) {
    #global-header nav[aria-label="主要ナビゲーション"] {
        display: none;
    }

    #menu-toggle {
        display: flex;
    }

    #mobile-nav-overlay {
        display: block;
    }
}

@media (min-width: 1120px) {
    #menu-toggle,
    #mobile-nav-overlay {
        display: none;
    }
}

/* Global Navigation / Conversion Architecture Refresh v0.1
 * Visual Preservation Constraint: additions only.
 */

.consult-utility-link .consult-copy-mobile {
    display: inline !important;
}

.consult-utility-link .consult-copy-desktop {
    display: none !important;
}

@media (min-width: 1120px) {
    .consult-utility-link .consult-copy-mobile {
        display: none !important;
    }

    .consult-utility-link .consult-copy-desktop {
        display: inline !important;
    }
}
.consult-utility-link:focus-visible,
.nav-dropdown-trigger:focus-visible,
.nav-dropdown-item:focus-visible,
.mobile-consult-btn:focus-visible,
.mobile-line-btn:focus-visible,
#menu-toggle:focus-visible {
    outline: 3px solid #1A2D54;
    outline-offset: 3px;
}

.consult-utility-link:focus-visible {
    outline-color: #FFFFFF;
    outline-offset: -3px;
}

.nav-dropdown-trigger {
    min-height: 44px;
}

.nav-dropdown-chevron {
    display: inline-block;
    font-size: 0.8em;
    line-height: 1;
    transform: translateY(-1px);
    transition: transform 0.2s ease;
}

.nav-dropdown-trigger[aria-expanded="true"] .nav-dropdown-chevron {
    transform: translateY(1px) rotate(180deg);
}

.nav-dropdown-trigger[aria-expanded="true"] .nav-wavy-line {
    opacity: 1;
}

.nav-dropdown-panel {
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    width: 250px;
    transform: translate(-50%, -4px);
    background: #FFFFFF;
    border: 1px solid rgba(248, 160, 26, 0.22);
    border-radius: 1rem;
    box-shadow: 0 12px 30px rgba(26, 45, 84, 0.12);
    padding: 0.45rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
    z-index: 220;
}

.nav-dropdown-panel.is-open {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
}

.nav-dropdown-item {
    display: block;
    min-height: 52px;
    padding: 0.65rem 0.8rem;
    border-radius: 0.75rem;
    color: #1A2D54;
    text-decoration: none;
    transition: color 0.18s ease, background-color 0.18s ease;
}

.nav-dropdown-item:hover,
.nav-dropdown-item:focus-visible {
    color: #F8A01A;
    background: rgba(248, 160, 26, 0.06);
}

.nav-dropdown-label,
.nav-dropdown-sub {
    display: block;
}

.nav-dropdown-label {
    font-size: 0.9rem;
    font-weight: 800;
    line-height: 1.35;
}

.nav-dropdown-sub {
    margin-top: 0.15rem;
    font-size: 0.68rem;
    font-weight: 700;
    line-height: 1.45;
    color: rgba(26, 45, 84, 0.62);
}

.nav-dropdown-item:hover .nav-dropdown-sub,
.nav-dropdown-item:focus-visible .nav-dropdown-sub {
    color: rgba(248, 160, 26, 0.82);
}

.mobile-consult-btn {
    min-height: 68px;
    width: 100%;
    background-color: #F8A01A;
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(248, 160, 26, 0.18);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.mobile-consult-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 12px 28px rgba(248, 160, 26, 0.24);
}


@media (prefers-reduced-motion: reduce) {
    #mobile-nav-overlay,
    #menu-toggle,
    .hamburger-span,
    .mobile-link,
    .mobile-consult-btn,
    .nav-dropdown-chevron,
    .nav-dropdown-panel,
    .nav-dropdown-item {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
    }
}

/* Mobile Navigation / Footer Density Optimization v0.1
 * Visual Preservation Constraint: mobile density only.
 */
@media (max-width: 1119px) {
    .mobile-nav-shell {
        box-sizing: border-box;
        justify-content: flex-start;
        min-height: 100%;
        padding-top: clamp(4rem, 8dvh, 5rem);
        padding-bottom: max(1rem, env(safe-area-inset-bottom));
    }

    .mobile-nav-content {
        gap: 0.35rem;
    }

    .mobile-nav-primary {
        display: flex;
        flex-direction: column;
        gap: 0.2rem;
    }

    .mobile-nav-primary-link {
        min-height: 44px;
        padding: 0.15rem 0;
    }

    .mobile-trust-group {
        width: 100%;
        margin-top: 0.2rem;
    }

    .mobile-trust-title {
        margin: 0 0 0.35rem;
        color: #F8A01A;
        font-size: 0.75rem;
        font-weight: 800;
        line-height: 1.2;
        letter-spacing: 0.16em;
    }

    .mobile-trust-links {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.35rem;
    }

    .mobile-trust-link {
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 44px;
        padding: 0.45rem 0.5rem;
        border-top: 1px solid rgba(248, 160, 26, 0.28);
        border-bottom: 1px solid rgba(248, 160, 26, 0.28);
        color: #1A2D54;
        font-size: 0.8rem;
        font-weight: 800;
        line-height: 1.35;
        text-decoration: none;
    }

    .mobile-trust-link:focus-visible {
        outline: 3px solid #1A2D54;
        outline-offset: 2px;
    }

    .mobile-consult-wrap {
        margin-top: 0.2rem;
    }

    .mobile-line-wrap {
        margin-top: 0;
    }
}

/* Mobile Navigation / Viewport Balance v0.1
 * Fit tall phones such as iPhone 14 Pro Max without sacrificing 44px targets.
 * Shorter viewports remain safely scrollable instead of clipping CTA content.
 */
@media (max-width: 1119px) and (max-height: 780px) {
    .mobile-nav-shell {
        padding-top: max(3.5rem, env(safe-area-inset-top));
        padding-bottom: max(0.75rem, env(safe-area-inset-bottom));
    }

    .mobile-nav-content {
        gap: 0.35rem;
    }

    .mobile-nav-primary {
        gap: 0;
    }

    .mobile-trust-group {
        margin-top: 0.1rem;
    }

    .mobile-trust-title {
        margin-bottom: 0.25rem;
    }

    .mobile-trust-links {
        gap: 0.25rem;
    }

    .mobile-consult-wrap {
        margin-top: 0.1rem;
    }
}

/* Mobile Navigation / Footer Composition Polish v0.1
 * Hide the redundant global floating LINE affordance while the menu is open.
 */
@media (max-width: 1119px) {
    body.menu-open #mobile-side-cta {
        opacity: 0 !important;
        visibility: hidden !important;
        pointer-events: none !important;
    }
}