/* ── Hamburger button and slide-in side menu, shared by every page ── */

.nav-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 40;
    width: 44px;
    height: 44px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
    padding: 0;
    border: 0;
    background: #000000;
    color: #ffffff;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: currentColor;
    transition: transform 0.3s ease, opacity 0.2s ease;
}

/* Bars fold into an X while the menu is open */
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.nav-toggle:focus-visible,
.site-nav a:focus-visible {
    outline: 2px solid #ffffff;
    outline-offset: 3px;
}

.nav-backdrop {
    position: fixed;
    inset: 0;
    z-index: 30;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0s linear 0.3s;
}

.site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 35;
    width: min(80vw, 20rem);
    padding: 88px 32px 32px;
    background: #000000;
    border-left: 1px solid rgba(255, 255, 255, 0.25);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.3s ease, visibility 0s linear 0.3s;
}

.site-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.site-nav a {
    font-family: "Zalando Sans Expanded", sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    line-height: 1.1;
    color: #ffffff;
    text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    text-decoration: underline;
    text-underline-offset: 0.2em;
}

body.nav-open .nav-backdrop {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease;
}

body.nav-open .site-nav {
    transform: translateX(0);
    visibility: visible;
    transition: transform 0.3s ease;
}

@media (prefers-reduced-motion: reduce) {
    .nav-toggle span,
    .nav-backdrop,
    .site-nav,
    body.nav-open .nav-backdrop,
    body.nav-open .site-nav {
        transition: none;
    }
}