header {
    display: flex;
    flex-shrink: 0;
    height: 10vh;
    width: 100%;
    background-image: url("marble-2362267_1920.jpg");
    background-size: cover;
    border: 1px solid #bbb;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    z-index: 10;
    align-items: center;
}

.brand {
    display: flex;
    position: relative;
}

.brand img {
    min-width: 240px;
    max-width: 25vw;
    max-height: 60vh;
    height: auto;
    margin: auto 0;
}

header h1 {
    font-size: 1.5rem;
    padding: 10px;
    margin: 0px;
    text-align: center;
    justify-self: center;
}

header img {
    height: 60px;
    align-self: center;
}

header .nav-container {
    position: relative;
    text-align: center;
    margin-left: auto;
    margin-right: 15px;
    display: flex;
    justify-content: space-between;
}

.hamburger {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--bg-color);
}

header .navigation {
    display: flex;
  }

header .navigation a {
    padding: 3px 10px;
    text-decoration: none;
    align-self: center;
}

header a:link {
    color: var(--brand-accent); /* bright sky blue */
}

header a:visited {
    color: var(--highlight-color); /* soft purple */
}

header a:focus,
header a img:focus {
  outline: none;
  box-shadow: none;
}

@media (max-width: 768px) {
    header .navigation {
      display: none;
      flex-direction: column;
      position: absolute;
      top: 3rem;
      right: 0;
      background: white;
      box-shadow: 0 2px 8px rgba(0,0,0,0.2);
      border-radius: 4px;
      padding: 1rem;
      z-index: 1000;
    }
  
    header .navigation.show {
      display: flex;
      gap: 1rem;
    }
  
    header .hamburger {
      display: block;
      margin-right: 5px;
    }
  }