Header on my web

I need to create header on my web, but I have problem with coding it. I don't know how to code the container with navigation, which will be start just after logo but I do not want to use percentages for responsiveness and I need to background which will continue after the navigation. The circle on the image is logo.

I have this one:

But I need to this:

The problem which I have is, I can not how to to with background like on the picture 2 but responsive and with container.

I have this code:

.site-nav {
  width: 100%;
  height: 230px;
  background: #fee17c;
}
.site-nav .nav-logo {
  height: 230px;
  float: left;
  display: flex;
}
.site-nav .nav-logo img {
  height: 160px;
  margin: auto;
}
.site-nav .nav-links {
  height: 230px;
  float: right;
}
.site-nav .nav-links .nav-links-box {
  height: 230px;
  display: flex;
}
@media (min-width: 768px) {
  .site-nav .nav-links .nav-links-box ul {
    list-style: none;
    margin: 0;
    padding: 0;
    margin: auto;
    background: url(../img/obd-ln-k-1.png);
    background-repeat: no-repeat;
    background-size: 100% 100%;
    padding: 1rem 0 1rem 0;
  }
  .site-nav .nav-links .nav-links-box ul li {
    margin: 0;
    padding: 0;
    padding: .7rem 1rem .7rem 0;
    text-transform: uppercase;
    float: right;
    margin: auto;
    padding-left: 1rem;
  }
  .site-nav .nav-links .nav-links-box ul li:not(:last-child) {
    padding-right: 1rem;
  }
  .site-nav .nav-links .nav-links-box ul li a {
    color: black;
    text-decoration: none;
    font-size: 20px;
    transition: .5s;
  }
  .site-nav .nav-links .nav-links-box ul li a:hover {
    color: #0864bb;
  }
}
@media (max-width: 768px) {
  .site-nav .nav-links .nav-links-box ul {
    list-style: none;
    margin: 0;
    padding: 0;
    width: 100%;
    position: absolute;
    top: 230px;
    left: 0;
    background: 768px-bg;
    z-index: 9999;
    display: none;
    border-bottom: 2px solid #fee17c;
    box-shadow: 0 8px 15px 0 rgba(0, 0, 0, 0.08);
  }
  .site-nav .nav-links .nav-links-box ul li {
    padding: 1rem 0 1rem 1.5rem;
  }
  .site-nav .nav-links .nav-links-box ul.show {
    display: block;
  }
}
.site-nav .nav-links .toggle-nav {
  width: 35px;
  height: 230px;
  border: 0;
  background: none;
  padding: 0;
  margin: 0;
  position: relative;
  cursor: pointer;
  outline: none;
  display: none;
}
@media (max-width: 768px) {
  .site-nav .nav-links .toggle-nav {
    display: block;
  }
}
.site-nav .nav-links .toggle-nav .dashes {
  display: block;
  width: 100%;
  position: relative;
  z-index: 2;
}
.site-nav .nav-links .toggle-nav .dashes .dash {
  display: block;
  width: 100%;
  height: 3px;
  background-color: #0864bb;
  transform-origin: 50% 50%;
  transition: transform .4s,-webkit-transform .4s;
}
.site-nav .nav-links .toggle-nav .dashes .dash:not(:first-child) {
  margin-top: 6px;
}
.site-nav .nav-links .toggle-nav.show .dashes .dash:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}
.site-nav .nav-links .toggle-nav.show .dashes .dash:nth-child(2) {
  visibility: hidden;
}
.site-nav .nav-links .toggle-nav.show .dashes .dash:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

<nav class="site-nav">
        <div class="container">
            <div class="nav-logo">
                <img src="assets/frontend/img/logo.png" alt="">
            </div><!-- .nav-logo -->
            <div class="nav-links">
                <button class="toggle-nav">
                    <span class="dashes" aria-hidden="true">
                        <span class="dash"></span>
                        <span class="dash"></span>
                        <span class="dash"></span>
                    </span>
                    <span class="txt">Menu</span>
                </button><!-- .toggle-nav -->
                <div class="nav-links-box">
                  <ul class="nav-list">
                      <li><a href="/">Home</a></li>
                      <li><a href="/">Home</a></li>
                      <li><a href="/">Home</a></li>
                      <li><a href="/">Home</a></li>
                      <li><a href="/">Home</a></li>
                      <li><a href="/">Home</a></li>
                  </ul>
                </div>
            </div><!-- .nav-links -->
        </div><!-- .container -->
    </nav><!-- .site-nav -->