/* Mobile navigation drawer — shared across all pages */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.nav-menu-toggle__label {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.nav-menu-toggle {
    display: none;
}

.nav-backdrop {
    display: none;
}

@media (max-width: 768px) {
    :root {
        /* Match navbar: vertical padding + hamburger/logo row (2.75rem) */
        --site-header-offset: calc(var(--spacing-md, 1.5rem) * 2 + 2.75rem + env(safe-area-inset-top, 0px));
    }

    html {
        scroll-padding-top: var(--site-header-offset);
    }

    body {
        padding-top: var(--site-header-offset);
    }

    .navbar {
        position: fixed;
        left: 0;
        right: 0;
        top: 0;
        width: 100%;
    }

    .nav-menu-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 2.75rem;
        height: 2.75rem;
        padding: 0;
        margin: 0;
        border: 1px solid rgba(255, 255, 255, 0.18);
        border-radius: 10px;
        background: rgba(255, 255, 255, 0.06);
        color: inherit;
        cursor: pointer;
        flex-shrink: 0;
        transition: background-color 0.2s ease, border-color 0.2s ease;
    }

    .nav-menu-toggle:hover,
    .nav-menu-toggle:focus-visible {
        background: rgba(50, 205, 50, 0.12);
        border-color: rgba(50, 205, 50, 0.35);
        outline: none;
    }

    .nav-menu-toggle__icon {
        position: relative;
        display: block;
        width: 1.125rem;
        height: 2px;
        background: currentColor;
        border-radius: 1px;
        color: #e8e8e8;
        transition: background-color 0.2s ease;
    }

    .nav-menu-toggle__icon::before,
    .nav-menu-toggle__icon::after {
        content: '';
        position: absolute;
        left: 0;
        width: 100%;
        height: 2px;
        background: currentColor;
        border-radius: 1px;
        transition: transform 0.2s ease, top 0.2s ease;
    }

    .nav-menu-toggle__icon::before {
        top: -6px;
    }

    .nav-menu-toggle__icon::after {
        top: 6px;
    }

    .navbar.is-nav-open .nav-menu-toggle__icon {
        background: transparent;
    }

    .navbar.is-nav-open .nav-menu-toggle__icon::before {
        top: 0;
        transform: rotate(45deg);
    }

    .navbar.is-nav-open .nav-menu-toggle__icon::after {
        top: 0;
        transform: rotate(-45deg);
    }

    .nav-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        z-index: 99;
        background: rgba(5, 5, 5, 0.55);
        backdrop-filter: blur(2px);
    }

    .nav-backdrop[hidden] {
        display: none;
    }

    body.nav-scroll-lock {
        overflow: hidden;
    }

    .nav-content {
        gap: var(--spacing-sm);
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        z-index: 101;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        width: min(20rem, 88vw);
        max-width: 100%;
        height: 100dvh;
        height: 100vh;
        margin: 0;
        padding: var(--site-header-offset) var(--container-padding, 1rem)
            calc(var(--spacing-xl) + env(safe-area-inset-bottom, 0px));
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        background: rgba(10, 10, 10, 0.98);
        border-left: 1px solid rgba(255, 255, 255, 0.12);
        box-shadow: -12px 0 40px rgba(0, 0, 0, 0.45);
        transform: translateX(100%);
        visibility: hidden;
        pointer-events: none;
        transition: transform 0.25s ease, visibility 0.25s ease;
    }

    .navbar.is-nav-open .nav-links {
        transform: translateX(0);
        visibility: visible;
        pointer-events: auto;
    }

    .nav-links > a {
        display: block;
        padding: 0.85rem 0;
        font-size: 1.05rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .nav-dropdown {
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .nav-dropdown-toggle {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding: 0.85rem 0;
        font-size: 1.05rem;
        text-align: left;
    }

    .nav-dropdown-toggle::after {
        content: '';
        width: 0.5rem;
        height: 0.5rem;
        margin-left: var(--spacing-sm);
        border-right: 2px solid currentColor;
        border-bottom: 2px solid currentColor;
        transform: rotate(45deg);
        transition: transform 0.2s ease;
        flex-shrink: 0;
    }

    .nav-dropdown.is-submenu-open .nav-dropdown-toggle::after {
        transform: rotate(-135deg);
    }

    .nav-dropdown-menu {
        position: static;
        left: auto;
        min-width: 0;
        width: 100%;
        padding: 0 0 var(--spacing-sm);
        margin: 0;
        border: 0;
        border-radius: 0;
        background: transparent;
        box-shadow: none;
        opacity: 1;
        pointer-events: auto;
        transform: none;
        display: none;
    }

    .nav-dropdown.is-submenu-open .nav-dropdown-menu {
        display: block;
    }

    .nav-dropdown:hover .nav-dropdown-menu,
    .nav-dropdown:focus-within .nav-dropdown-menu {
        transform: none;
    }

    .nav-dropdown-menu a {
        padding: 0.65rem 0 0.65rem var(--spacing-sm);
        font-size: 0.95rem;
        white-space: normal;
    }

    .nav-dropdown-menu .nav-dropdown-subitem {
        padding-left: var(--spacing-md);
    }
}

@media (prefers-reduced-motion: reduce) {
    .nav-links,
    .nav-menu-toggle__icon,
    .nav-menu-toggle__icon::before,
    .nav-menu-toggle__icon::after {
        transition: none;
    }
}