.header-menu-trigger {
    order: 4;
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-left: 0.65rem;
    white-space: nowrap;
}

html.header-side-menu-open,
html.header-side-menu-open body {
    overflow: hidden;
}

.header-side-menu {
    position: fixed;
    inset: 0;
    width: 100vw;
    max-width: none;
    height: 100dvh;
    max-height: none;
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--text);
    overflow: hidden;
}

.header-side-menu-focus-guard {
    position: fixed;
    top: 0;
    left: 0;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
}

.header-side-menu::backdrop {
    background: rgba(0, 0, 0, 0.62);
    backdrop-filter: blur(3px);
    opacity: 0;
    transition: opacity 180ms ease;
}

.header-side-menu.is-open::backdrop {
    opacity: 1;
}

.header-side-menu-panel {
    box-sizing: border-box;
    width: min(390px, calc(100vw - 48px));
    height: 100%;
    margin-left: auto;
    display: flex;
    flex-direction: column;
    border-left: 1px solid color-mix(in srgb, var(--line) 82%, var(--red-bright));
    background:
        radial-gradient(circle at 100% 0, color-mix(in srgb, var(--red-bright) 14%, transparent), transparent 26rem),
        linear-gradient(180deg, color-mix(in srgb, var(--panel) 97%, var(--bg)), color-mix(in srgb, var(--panel-2) 96%, var(--bg)));
    box-shadow: -28px 0 70px rgba(0, 0, 0, 0.38);
    transform: translateX(100%);
    transition: transform 220ms cubic-bezier(.2, .8, .2, 1);
}

.header-side-menu.is-open .header-side-menu-panel {
    transform: translateX(0);
}

.header-side-menu-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 76px;
    padding: 18px 20px 16px 24px;
    border-bottom: 1px solid var(--line);
    background: color-mix(in srgb, var(--panel) 88%, transparent);
    backdrop-filter: blur(14px);
}

.header-side-menu-title-wrap {
    min-width: 0;
    display: grid;
    gap: 3px;
}

.header-side-menu-kicker {
    color: var(--red-bright);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.header-side-menu-heading h2 {
    margin: 0;
    font-size: clamp(1.45rem, 3vw, 1.8rem);
    line-height: 1;
    letter-spacing: 0.02em;
}

.header-side-menu-close {
    flex: 0 0 42px;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--panel-2);
    color: var(--text);
    font: inherit;
    font-size: 1.65rem;
    line-height: 1;
    cursor: pointer;
    transition: border-color 140ms ease, background 140ms ease, transform 140ms ease;
}

.header-side-menu-close:hover {
    border-color: color-mix(in srgb, var(--red-bright) 62%, var(--line));
    background: color-mix(in srgb, var(--red-bright) 12%, var(--panel-2));
}

.header-side-menu-close:active {
    transform: scale(0.96);
}

.header-side-menu-close:focus-visible,
.header-side-menu-item:focus-visible {
    outline: 2px solid var(--red-bright);
    outline-offset: 2px;
}

.header-side-menu-scroll {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 14px 16px 20px;
    scrollbar-gutter: stable;
}

.header-side-menu-group {
    display: grid;
    gap: 4px;
}

.header-side-menu-group + .header-side-menu-group {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
}

.header-side-menu-item {
    box-sizing: border-box;
    width: 100%;
    min-height: 46px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 10px 13px;
    border: 1px solid transparent;
    border-radius: 11px;
    background: transparent;
    color: var(--text);
    font: inherit;
    font-size: 1rem;
    font-weight: 650;
    line-height: 1.2;
    text-align: left;
    text-decoration: none;
    cursor: pointer;
    transition: background 140ms ease, border-color 140ms ease, color 140ms ease, transform 140ms ease;
}

.header-side-menu-item:hover {
    border-color: color-mix(in srgb, var(--red-bright) 24%, var(--line));
    background: color-mix(in srgb, var(--red-bright) 10%, var(--panel-2));
    color: var(--text);
}

.header-side-menu-item:active {
    transform: translateX(2px);
}

.header-side-menu-item[href]::after {
    content: "›";
    flex: 0 0 auto;
    color: var(--muted);
    font-size: 1.35rem;
    font-weight: 500;
    line-height: 1;
}

.header-side-menu-footer {
    flex: 0 0 auto;
    padding: 14px 16px max(14px, env(safe-area-inset-bottom));
    border-top: 1px solid var(--line);
    background: color-mix(in srgb, var(--panel) 94%, transparent);
}

.header-side-menu-footer form {
    margin: 0;
}

.header-side-menu-footer .header-side-menu-item {
    background: color-mix(in srgb, var(--panel-2) 86%, transparent);
    border-color: var(--line);
}

@media (max-width: 520px) {
    .header-side-menu-panel {
        width: min(92vw, 420px);
    }

    .header-side-menu-heading {
        min-height: 68px;
        padding: 14px 14px 12px 18px;
    }

    .header-side-menu-scroll {
        padding-inline: 12px;
    }

    .header-side-menu-footer {
        padding-inline: 12px;
    }
}

@media (max-width: 360px) {
    .header-side-menu-panel {
        width: 100vw;
        border-left: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .header-side-menu::backdrop,
    .header-side-menu-panel,
    .header-side-menu-close,
    .header-side-menu-item {
        transition: none;
    }
}