/* V16 Mobile Navigation Drawer — fast, GPU-friendly, touch-first */
.v16-mnav {
    --mnav-ink: #0a2f45;
    --mnav-teal: #00668e;
    --mnav-cyan: #3eb5d0;
    --mnav-line: rgba(10, 47, 69, 0.1);
    --mnav-muted: rgba(10, 47, 69, 0.62);
    --mnav-sheet: #f4f8fb;
    --mnav-card: #ffffff;
    position: fixed;
    inset: 0;
    z-index: 400;
    display: block;
    pointer-events: none;
    visibility: hidden;
}

.v16-mnav.is-open {
    pointer-events: auto;
    visibility: visible;
}

.v16-mnav__backdrop {
    position: absolute;
    inset: 0;
    border: 0;
    padding: 0;
    margin: 0;
    cursor: pointer;
    background: rgba(6, 22, 39, 0.48);
    opacity: 0;
    transition: opacity 220ms ease;
    -webkit-tap-highlight-color: transparent;
}

.v16-mnav.is-open .v16-mnav__backdrop {
    opacity: 1;
}

.v16-mnav__sheet {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    width: min(100vw, 400px);
    height: 100%;
    height: 100dvh;
    padding: 0;
    overflow: hidden;
    background:
        radial-gradient(ellipse 80% 40% at 100% 0%, rgba(62, 181, 208, 0.16), transparent 55%),
        linear-gradient(180deg, #eef5fa 0%, var(--mnav-sheet) 40%, #fff 100%);
    box-shadow: -18px 0 48px rgba(6, 22, 39, 0.22);
    transform: translate3d(104%, 0, 0);
    transition: transform 280ms cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform;
}

.v16-mnav.is-open .v16-mnav__sheet {
    transform: translate3d(0, 0, 0);
}

.v16-mnav__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex: 0 0 auto;
    padding: calc(12px + env(safe-area-inset-top, 0px)) 16px 12px;
    border-bottom: 1px solid var(--mnav-line);
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.v16-mnav__brand {
    display: grid;
    gap: 2px;
    min-width: 0;
}

.v16-mnav__eyebrow {
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--mnav-teal);
}

.v16-mnav__brand strong {
    font-family: var(--font-heading, inherit);
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--mnav-ink);
}

.v16-mnav__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--mnav-line);
    border-radius: 12px;
    background: #fff;
    color: var(--mnav-ink);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.v16-mnav__close svg {
    width: 18px;
    height: 18px;
}

.v16-mnav__close:active {
    transform: scale(0.96);
}

.v16-mnav__nav,
.v16-mnav__aux {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 12px 12px 8px;
}

.v16-mnav__nav {
    flex: 1 1 auto;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    padding-bottom: 8px;
}

.v16-mnav__aux {
    flex: 0 0 auto;
    max-height: 38%;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding-top: 10px;
    padding-bottom: calc(14px + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid var(--mnav-line);
    background: rgba(255, 255, 255, 0.55);
}

.v16-mnav__aux-label {
    margin: 0 4px 4px;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--mnav-muted);
}

.v16-mnav__link {
    display: flex;
    align-items: center;
    min-height: 48px;
    padding: 12px 14px;
    border-radius: 14px;
    color: var(--mnav-ink);
    font-family: var(--font-nav, inherit);
    font-size: 0.98rem;
    font-weight: 700;
    line-height: 1.35;
    text-decoration: none;
    background: var(--mnav-card);
    border: 1px solid transparent;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8);
    -webkit-tap-highlight-color: transparent;
}

.v16-mnav__link:active {
    background: rgba(0, 102, 142, 0.08);
}

.v16-mnav__link--top {
    font-size: 1.02rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    border-color: rgba(0, 102, 142, 0.08);
}

.v16-mnav__link--section {
    color: var(--mnav-teal);
    background: rgba(0, 102, 142, 0.07);
    font-size: 0.88rem;
    font-weight: 700;
    min-height: 42px;
}

.v16-mnav__link--child,
.v16-mnav__link--aux {
    font-size: 0.92rem;
    font-weight: 600;
    min-height: 44px;
    background: transparent;
    box-shadow: none;
}

.v16-mnav__link--aux {
    background: rgba(255, 255, 255, 0.7);
}

.v16-mnav__acc {
    margin: 0;
    border-radius: 14px;
    background: var(--mnav-card);
    border: 1px solid rgba(0, 102, 142, 0.08);
    overflow: clip;
}

.v16-mnav__acc--nested,
.v16-mnav__acc--aux {
    background: rgba(255, 255, 255, 0.72);
    border-color: rgba(10, 47, 69, 0.08);
}

.v16-mnav__summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 52px;
    padding: 12px 14px;
    list-style: none;
    cursor: pointer;
    color: var(--mnav-ink);
    font-family: var(--font-nav, inherit);
    font-size: 1.02rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    line-height: 1.3;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.v16-mnav__summary::-webkit-details-marker {
    display: none;
}

.v16-mnav__summary::marker {
    content: '';
}

.v16-mnav__summary span {
    min-width: 0;
    flex: 1 1 auto;
}

.v16-mnav__summary--nested,
.v16-mnav__summary--aux {
    min-height: 46px;
    font-size: 0.94rem;
    font-weight: 700;
}

.v16-mnav__chev {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: var(--mnav-teal);
    transition: transform 200ms ease;
}

.v16-mnav__acc[open] > .v16-mnav__summary {
    border-bottom: 1px solid var(--mnav-line);
    background: linear-gradient(90deg, rgba(0, 102, 142, 0.08), transparent 70%);
}

.v16-mnav__acc[open] > .v16-mnav__summary .v16-mnav__chev {
    transform: rotate(180deg);
}

.v16-mnav__acc-body {
    display: grid;
    gap: 4px;
    padding: 8px;
    background: rgba(238, 245, 250, 0.65);
}

.v16-mnav__acc--nested > .v16-mnav__acc-body,
.v16-mnav__acc--aux > .v16-mnav__acc-body {
    background: rgba(10, 47, 69, 0.03);
}

body.nav-open {
    overflow: hidden;
    touch-action: none;
}

/* Burger morph → X */
.nav-toggle {
    position: relative;
    z-index: 410;
}

.nav-toggle.is-active span:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
}

.nav-toggle.is-active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.nav-toggle.is-active span:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
}

.nav-toggle span {
    transition: transform 220ms ease, opacity 180ms ease;
}

/* Hide legacy mobile menu if still present */
.main-menu--mobile {
    display: none !important;
}

@media (min-width: 1281px) {
    .v16-mnav,
    .nav-toggle {
        display: none !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    .v16-mnav__backdrop,
    .v16-mnav__sheet,
    .v16-mnav__chev {
        transition: none !important;
    }
}