.site-header {
    position: fixed;
    z-index: 100;
    inset: 0 0 auto;
    height: var(--abc-header-height);
    border-bottom: 1px solid transparent;
    transition: background-color 180ms ease, border-color 180ms ease, backdrop-filter 180ms ease;
}

.site-header.is-scrolled,
.site-header.is-menu-open {
    border-color: color-mix(in srgb, var(--abc-border) 78%, transparent);
    background: color-mix(in srgb, var(--abc-bg) 88%, transparent);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
}

.site-header__inner {
    display: grid;
    grid-template-columns: minmax(7.5rem, 1fr) auto minmax(7.5rem, 1fr);
    align-items: center;
    height: 100%;
    gap: clamp(1rem, 2vw, 2.5rem);
}

.site-brand {
    position: relative;
    z-index: 2;
    display: inline-flex;
    align-items: baseline;
    font-size: 1rem;
    font-weight: 850;
    line-height: 1;
    letter-spacing: -0.035em;
    justify-self: start;
}

.site-brand__abc {
    color: var(--abc-text);
}

.site-brand__bridge {
    color: var(--abc-purple);
}

.site-brand__picture {
    display: flex;
    width: 7.5em;
    height: 1em;
    align-items: center;
}

.site-brand__logo {
    display: block;
    width: 100%;
    height: auto;
}

.primary-nav {
    justify-self: center;
}

.primary-nav__list {
    display: flex;
    align-items: center;
    gap: clamp(1.3rem, 2.8vw, 2.7rem);
    margin: 0;
    padding: 0;
    list-style: none;
}

.primary-nav a {
    position: relative;
    display: block;
    padding: 0.7rem 0;
    color: var(--abc-text-muted);
    font-size: 1.05rem;
    font-weight: 620;
    letter-spacing: -0.01em;
    transition: color 160ms ease;
}

.primary-nav a::after {
    position: absolute;
    right: 0;
    bottom: 0.35rem;
    left: 0;
    height: 1px;
    content: "";
    background: var(--abc-purple);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 180ms ease;
}

.primary-nav a:hover,
.primary-nav a:focus-visible {
    color: var(--abc-text);
}

.primary-nav a:hover::after,
.primary-nav a:focus-visible::after {
    transform: scaleX(1);
    transform-origin: left;
}

.primary-nav a.primary-nav__icon-link {
    display: grid;
    width: 2.25rem;
    height: 2.25rem;
    place-items: center;
    color: var(--abc-purple);
}

.primary-nav__icon-link svg {
    width: 1.55rem;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.35;
}

.primary-nav a.primary-nav__icon-link::after {
    display: none;
}

.primary-nav__whatsapp-item {
    display: none;
}

.site-header__mark {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    color: var(--abc-purple);
    font-family: var(--abc-font-mono);
    font-size: 0.82rem;
    font-weight: 700;
    justify-self: end;
}

.site-header__mark i {
    width: 0.48rem;
    aspect-ratio: 1;
    background: var(--abc-yellow);
}

.nav-toggle {
    position: relative;
    z-index: 2;
    display: none;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0.65rem;
    border: 1px solid var(--abc-border);
    color: var(--abc-text);
    background: var(--abc-surface);
    cursor: pointer;
}

.nav-toggle__line {
    position: absolute;
    left: 0.7rem;
    width: 1.25rem;
    height: 1px;
    background: currentColor;
    transition: transform 180ms ease, opacity 180ms ease, top 180ms ease;
}

.nav-toggle__line:nth-child(1) { top: 0.87rem; }
.nav-toggle__line:nth-child(2) { top: 1.32rem; }
.nav-toggle__line:nth-child(3) { top: 1.77rem; }

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
    top: 1.32rem;
    transform: rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
    top: 1.32rem;
    transform: rotate(-45deg);
}

@media (max-width: 60rem) {
    :root {
        --abc-header-height: 4.5rem;
    }

    .site-header__inner {
        grid-template-columns: 1fr auto;
    }

    .site-header__mark {
        display: none;
    }

    .nav-toggle {
        display: block;
        border: 0;
        background: transparent;
    }

    .primary-nav {
        position: fixed;
        z-index: 1;
        inset: 0;
        width: 100%;
        height: 100dvh;
        justify-self: stretch;
        overflow-x: hidden;
        overflow-y: auto;
        visibility: hidden;
        background: var(--abc-surface);
        opacity: 0;
        pointer-events: none;
        overscroll-behavior: contain;
        transform: translateY(-0.75rem);
        transition: opacity 200ms ease, transform 240ms ease, visibility 200ms ease;
    }

    .primary-nav.is-open {
        visibility: visible;
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .primary-nav__list {
        align-items: stretch;
        flex-direction: column;
        gap: 0;
        width: 100%;
        min-height: 100%;
        margin: 0;
        padding: calc(var(--abc-header-height) + clamp(2.5rem, 8vh, 4.5rem)) 0 2rem;
    }

    .primary-nav li {
        border-bottom: 1px solid color-mix(in srgb, var(--abc-border) 85%, transparent);
    }

    .primary-nav a,
    .primary-nav a.primary-nav__icon-link {
        display: flex;
        align-items: center;
        width: min(calc(100% - 2rem), var(--abc-container));
        min-height: 4.75rem;
        margin-inline: auto;
        padding: 1.15rem 0;
        border: 0;
        color: var(--abc-text);
        font-size: clamp(1.08rem, 4.8vw, 1.3rem);
        font-weight: 520;
    }

    .primary-nav a.primary-nav__icon-link {
        height: auto;
        justify-content: flex-start;
        color: var(--abc-purple);
    }

    .primary-nav__whatsapp-item {
        display: block;
        margin-top: auto;
        border-top: 1px solid color-mix(in srgb, var(--abc-border) 85%, transparent);
        border-bottom: 0;
    }

    .primary-nav a.primary-nav__whatsapp-link {
        flex-direction: column;
        justify-content: center;
        gap: 0.35rem;
        color: var(--abc-text);
        font-weight: 650;
        line-height: 1.2;
        text-align: center;
    }

    .primary-nav__whatsapp-link svg {
        width: 2.25rem;
        height: 2.25rem;
        flex: 0 0 auto;
        padding: 0.38rem;
        border-radius: 50%;
        background: #25D366;
        fill: none;
        stroke: #FFFFFF;
        stroke-linecap: round;
        stroke-linejoin: round;
        stroke-width: 1.4;
    }

    .primary-nav a::after {
        display: none;
    }

    .nav-toggle[aria-expanded="true"] .nav-toggle__line {
        left: 0.48rem;
        width: 1.8rem;
        height: 2px;
    }

    .site-header.is-menu-open {
        border-color: transparent;
        background: var(--abc-surface);
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
    }
}