body{
    margin: 0;
}
header{
    font-family: "Instrument Serif", serif;
    font-style: normal;
    font-size: 45px;
    position: relative;
    padding-top: 400px; 
    padding-bottom: 400px;
    background-position: center;
    background-size: cover;
    margin: 0;
    color: white;
}
body.home header{
    background-image: url(images/home-title-image.jpg);
}
body.design header{
    background-image: url(images/design-title-image.jpg);
}
body.models header{
    background-image: url(images/image-header-models.jpg);
}
body.significance header{
    background-image: url(images/title-image-sig.jpg);
}
a{
    color: white;
    position: relative;
    text-decoration: none;
}
a:after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 2px;
    background: white;
    opacity: 0;
    transition: opacity 0.2s;
}
a:hover::after{
    opacity: 0.25;
}
a.active::after {
    opacity: 1;
}

ul {
  display: flex;
  list-style: none;
  gap: 45px;
  margin: 0;
  padding: 0;
}
ul li a{
    display: flex;
    align-items: center;
    font-size: 45px;
}
.navbar{
    position: absolute;
  top: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-sizing: border-box;
  height: 60px;
  width: 100%;
  padding: 60px 60px;
}
.nav-toggle {
  display: none;
}
.hamburger {
  display: none;
  font-size: 40px;
  cursor: pointer;
  margin-left: auto;
  color: white;
}
.logo{
     display: flex;
     align-items: center;
     font-style: italic;
}
.navdiv{
    display: flex;
    align-items: center;
    margin-left: auto;
    box-sizing: border-box;
}
.navbar a{
    text-decoration: none;
}
.columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  max-width: 1000px;
  margin-left: auto; margin-right: auto;
  width: 90%;
  margin-top: -35px;
}
.home-image{
    max-width: 600px;
    margin-top: 20px;
}

.left-column{
    margin-top: 50px;
}
.columns-wrapper {
  padding: 2rem 0;
  margin-bottom: 75px;
}
.box {
  border: 2px solid #333;
  padding: 5px 0px 3px 15px;
  border-radius: 5px;
  margin-bottom: 10px;
  margin-top: 5px;
}
.specs{
    margin: 5px;
}
.right-column{
    background-color: #E4EBF1;
    font-family: instrument sans;
}
.overview-label{
    display: none;
    cursor: pointer;
    font-size: 30px;
    padding: 10px;
}
.right-column-content{
        max-height: none;
        overflow: visible;
        transition: max-height 0.3s ease;
}
.main-content {
  max-width: 800px;
  width: 90%;
}
.design-image{
    max-width: 100%;
}
.slider-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    color: white;
    font-size: 40px;
    background: none;
    border: none;
    padding: 0;
}
.slider-button-left {
    left: 10px;
}
.slider-button-right { 
    right: 10px;
}
.model-slides{
    max-width: 100%;
}
h1{
    font-family: "Instrument Serif", serif;
    font-weight: 400;
    font-size: 36px;
    line-height: 0;
}
h2{
    font-family: "Instrument Serif", serif;
    font-style: normal;
    font-size: 28px;
    line-height: 0;
}
p{
    font-family: "Instrument Sans", sans-serif;
    font-style: normal;
    font-weight: 300;
    font-size: 16px;
    line-height: 1.4;
}
.manufacturer{
    padding-top: 17px;
}
strong{
    font-weight: 700;
}
.right-column-content{
    max-width: 90%;
    margin-left: auto;
    margin-top: 75px;
}
.right-column-section{
    padding: 0 0 40px 0;
}
.subtitle{
    margin-bottom: -10px;
}
.main-content{
    max-width: 1000px;
    margin-left: auto; margin-right: auto;
    width: 90%;
    margin-top: 65px;
}
.image-left{
    max-width: 500px;
}
.image-left img{
    width: 100%;
}
.image-right img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.conception{
    margin-bottom: 100px;
}
.columns-wrapper-design{
    margin-bottom: 75px;
}
.main-content-models{
    max-width: 1000px;
    margin-left: auto; margin-right: auto;
    margin-top: 65px;
    position: relative;
}
.slideshow{
    margin: 60px 0 80px 0;
    max-width: 1000px;
    height: 600px;
    position: relative;
}
.slides{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
}
.slides.active{
    display: block;
}
.slide-labels{
    position: absolute;
    bottom: 20px;
    left: 20px;
    font-family: "Instrument Serif", serif;
    font-style: italic;
    font-size: 80px;
    color: white;
}
.slides img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}  
.significance-image{
    width: 100%;
    height: auto;
    margin-top: 60px;
    display: block;
    margin-bottom: 75px;
}
.footer{
    font-size: 10px;
    background-color: #9babb9;
    padding: 10px;
    text-align: center;
}
@media (max-width: 1000px) {
    .columns {
      grid-template-columns: 400px 1fr;
    }
    .home-image{
        max-width: 100%;
    }
    header{
        padding-bottom: 200px;
        font-size: 30px;
    }
    ul li a{
        font-size: 30px;
    }
}
@media (max-width: 1000px) {
    .main-content-models{
        max-width: calc(100% - 40px);
        margin: 60px auto 40px auto;
    }
    .slideshow{
        margin-bottom: 80px;
    }
    .slides img{
        object-fit: cover;
    }
    .main-content-models p{
        word-break: break-word;
    }
}
@media (max-width: 1000px) {
    .main-content-significance p{
        word-break: break-word;
    }
}
@media (max-width: 1000px) {
    .footer p{
        font-size: 12px;
    }
}
@media (min-width: 701px) {
    .overview-toggle {
        display: none;
    }
}
@media (max-width: 700px) {
    body{
        overflow-x: hidden;
    }
    h1{
    font-size: 30px;
    }
    h2{
        font-size: 25px;
    }
    p{
        font-size: 17px;
    }
    header{
        padding-bottom: 57px;
    }
}
@media (max-width: 700px) {
    .navbar{
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 34px 60px;
        height: auto;
    }
    .hamburger {
        display: block;
        position: relative;
        z-index: 9999;
        margin-left: auto;
        font-size: 40px;
    }
    .navdiv {
        flex-direction: column;
        align-items: flex-end;
        gap: 15px;
        background: rgba(0,0,0,0.6);
        padding: 174px 65px;
        position: absolute;
        top: 0px;
        right: 0px;
        transition: transform 0.3s ease, opacity 0.3s ease;
        pointer-events: none;
        opacity: 0;
    }
    .nav-toggle:checked ~ .navdiv{
    transform: translateX(0);
    pointer-events: auto;
    opacity: 1;
    }
    .navdiv a {
    font-size: 20px;
    }
}
@media (max-width: 777px) {
    .columns {
    grid-template-columns: 1fr;
    }
    .left-column {
        order: 2;
        margin-top: 0;
    }
    .right-column {
        order: 1;
    }
    .overview-label{
        display: block;
        margin-bottom: 0;
        cursor: pointer;
        font-family: "Instrument Serif", serif;
        font-weight: 400;
        font-size: 36px;
        padding: 30px 0 0 30px;
    }
    .right-column-content{
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.5s ease;
        padding: 12px 30px;
        margin: 0;
    }
    .right-column-section {
        display: block;
        transform: none;
        opacity: 1;
        pointer-events: auto;
    }
    .right-column-section .subtitle h1{
        display: none;
    }
    .right-column-section:first-child {
        padding-bottom: 0;
        overflow: visible;
    }
    .right-column-section:first-child p {
        margin-top: 0;
        padding-top: 17px;
    }
    .overview-toggle{
    display: none;
    }
    .overview-toggle:checked ~ .right-column-content {
    max-height: 2000px;
    }
}
@media (max-width: 700px) {
   .left-column{
        margin-top: -30px; 
    }
    .left-column h1{
        display: none;
    }
}
@media (max-width: 700px) {
    .slideshow {
        max-width: 100%;
        height: auto;
        position: relative;
        margin: 20px auto;
    }
    .slides{
        position: relative;
        width: 100%;
        height: auto;
    }
    .slides img {
        width: 100%;
        height: 100%;
        display: block;
    }
    .slider-button {
        position: absolute;
        top: 50%;

    }
    .slider-button-left { 
        left: 10px;
    }
    .slider-button-right { 
        right: 10px;
    }
    .slide-labels{
        font-size: 40px;
    }
}