.mobile-whatsapp {
    display: none;
}

@media (max-width: 900px) {
    .header {
        gap: .5rem;
        padding-left: max(16px, env(safe-area-inset-left));
        padding-right: max(16px, env(safe-area-inset-right));
    }

    .mobile-whatsapp {
        display: inline-flex;
        flex: 0 0 44px;
        width: 44px;
        height: 44px;
        align-items: center;
        justify-content: center;
        border: 1px solid var(--green);
        border-radius: 50%;
        color: var(--green);
        font: 800 .72rem/1 Manrope, sans-serif;
        letter-spacing: -.02em;
    }

    .mobile-whatsapp:hover {
        background: #fff;
    }

    .mobile-whatsapp:focus-visible,
    .nav-toggle:focus-visible {
        outline: 3px solid var(--green);
        outline-offset: 2px;
    }

    .nav-toggle {
        flex: 0 0 44px;
        width: 44px;
        height: 44px;
        padding: 0;
        border-radius: 50%;
        cursor: pointer;
    }
}

@media (max-width: 350px) {
    .header .brand {
        gap: .45rem;
        font-size: 1.05rem;
        letter-spacing: .08em;
    }

    .header .brand-mark {
        width: 36px;
        height: 36px;
    }
}