:root {
  /* ========= GREEN THEME =========== */
  --color-primary: #ff7b02;
  --color-primary-variant: #e5a55d;
  --color-bg-1: #000e17;
  --color-bg-2: #001e2d;
  --color-bg-3: #012734;
  --color-bg-4: #003347;
  --color-light: #85a2b2;
  --color-white: hsl(0, 0%, 90%);

  /* ========= PRUPLE THEME ========= */

  /* --color-primary:#ff7b02;
    --color-primary-variant: #e5a55d;
    --color-bg-1:  #140021;
    --color-bg-2:  #1e0032;
    --color-bg-3:  #25003e;
    --color-bg-4:  #36005a;
    --color-light: #d0b8e0;
    --color-white: hsl(0, 0%, 90%); */

  /* ========== SIZE ============== */

  --container-width-lg: 88%;
  --container-width-md: 92%;

  --transition: all 400ms ease;
}

* {
  margin: 0;
  padding: 0;
  border: 0;
  outline: 0;
  list-style-type: none;
  text-decoration: none;
  box-sizing: border-box;
}

::-webkit-scrollbar {
    width: 5px;
    height: 5px;
  }
  
  ::-webkit-scrollbar-track {
    background: var(--color-bg-4);
  }
  
  ::-webkit-scrollbar-thumb {
    background: linear-gradient(
        var(--color-primary-variant),
        var(--color-primary)
      );
    border-radius: 6px;
  }

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Montserrat", sans-serif;
  background: var(--color-bg-3) url(./assets/bg-texture.png);
  color: var(--color-light);
  line-height: 1.7;
}

h1,
h2 {
  line-height: 1.1;
  font-weight: 400;
}

h1 {
  font-size: 4rem;
  color: var(--color-white);
}

h2 {
  font-size: 3.5rem;
}

a {
  color: var(--color-light);
  transition: var(--transition);
}

a:hover {
  color: var(--color-primary);
}

.container {
  width: var(--container-width-lg);
  margin: 0 auto;
  max-width: 2160px;
}

img {
  display: block;
  object-fit: cover;
  width: 100%;
}

/* ================= NAV ================== */

nav {
  height: 5rem;
  width: 100vw;
  display: grid;
  place-items: center;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 99;
  transition: var(--transition);
}

/* nav class on scroll using javascript*/
.window-scrolled {
  background: var(--color-bg-2);
  border-bottom: 0.2rem solid var(--color-bg-3);
  box-shadow: 0 1rem 1rem rgba(0, 0, 0, 0.3);
}

.nav__container {
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
/*only need on tablets and phones*/
.nav__toggle-btn {
  display: none;
}

.nav__logo {
  width: 7.5rem;
}

.nav__links {
  display: flex;
  gap: 4rem;
}

.nav__socails {
  display: flex;
  gap: 1rem;
}

.nav__socails a {
  width: 2rem;
  height: 2rem;
  background: linear-gradient(
    var(--color-primary-variant),
    var(--color-primary)
  );
  border-radius: 0.5rem;
  color: var(--color-bg-4);
  display: grid;
  place-items: center;
}

.nav__socails a:hover {
  box-shadow: 0 1rem 1rem rgba(0, 0, 0, 0.4);
}

/* ================= HEADER ================== */

header {
  max-width: 100vw;
  height: 100vh;
  position: relative;
  top: 0;
  background: linear-gradient(var(--color-bg-3), var(--color-bg-1));
  overflow: hidden;
}

.header__container {
  display: grid;
  grid-template-columns: 43% 53%;
  gap: 4%;
  margin-top: 10rem;
  position: relative;
}

.header__image-bg {
  background: var(--color-bg-4);
  height: 22rem;
  width: 16rem;
  position: absolute;
  transition: var(--transition);
}

.header__image-lg {
  width: 29rem;
  position: relative;
  top: 1rem;
  left: 1rem;
  filter: saturate(0) brightness(0.3); /**/
  transition: var(--transition);
}

.header__image-sm {
  width: 28rem;
  height: 28rem;
  overflow: hidden;
  position: absolute;
  left: 6rem;
  top: 6rem;
  transition: var(--transition);
}

.header__left:hover .header__image-sm {
  opacity: 0;
}

.header__left:hover .header__image-lg {
  filter: saturate(1) brightness(1);
  border: 1rem solid var(--color-bg-4);
  top: 0;
  left: 0;
}

.header__left:hover .header__image-bg {
  opacity: 0;
}

.header__head {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}
/* general empty styles */
.empty {
  height: 3.5rem;
  width: 18rem;
  background: var(--color-bg-2);
  border-radius: calc(3.5rem / 2);
  margin-bottom: 3.5rem;
  box-shadow: inset 0 1rem 1rem rgba(0, 0, 0, 0.3);
  border: 1px solid var(--color-bg-4);
}

.header__tag {
  color: var(--color-primary-variant);
}

.header__right p {
  margin-top: 2rem;
  width: 85%;
}

/* only shows on tablets and phones*/
.header__btn-md {
  display: none;
}

.header__frames {
  position: absolute;
  top: 88vh;
  right: 44rem;
  transition: var(--transition);
}

.header__frame {
  width: 14rem;
  border: 0.4rem solid var(--color-bg-3);
  box-shadow: 0 0 4rem rgba(0, 0, 0, 0.5);
  position: absolute;
  transform: rotate(-10deg);
  transform-origin: bottom left;
  transition: var(--transition);
}
.header__frame:nth-child(2) {
  transform: rotate(20deg);
  top: -2rem;
  left: 2rem;
}

.header__frames:hover .header__frame {
  transform: rotate(0);
}

.header__frames:hover .header__frame:nth-child(2) {
  top: 0;
  left: 15rem;
}

/* general style for cotanct buttons */

.contact__btn {
  color: var(--color-bg-1);
  width: 10rem;
  height: 10rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: var(--transition);
}

.header__btn {
  background: linear-gradient(
    -30deg,
    var(--color-primary-variant),
    var(--color-primary),
    var(--color-primary-variant)
  );
  position: absolute;
  right: 3%;
  bottom: -3rem;
}

.header__btn:hover {
  box-shadow: 0 2rem 2rem rgba(0, 0, 0, 0.3);
  transform: translateY(-1rem);
  color: var(--color-bg-1);
}

.contact__btn i {
  font-size: 3.5rem;
  position: absolute;
}

.contact__btn p {
  font-size: 1rem;
  font-weight: 600;
  width: 10rem;
  height: 10rem;
  display: flex;
  justify-content: center;
  animation: spinText 30s linear infinite;
}

.contact__btn p span {
  position: absolute;
  transform-origin: 0.3rem 5rem;
}

@keyframes spinText {
  to {
    transform: rotate(360deg);
  }
}

/* ================= ABOUT ================== */

#about {
    margin-top: 18rem;
}

.about__container {
    display: grid;
    grid-template-columns: 10rem 26rem auto;
    gap: 3rem;
    position: relative;
}

.about__title{
    position: absolute;
    top: -7rem;
    z-index: 1;
}

.about__btn {
    color: var(--color-primary-variant);
    align-self: end;
}

.about__btn:hover{
    transform: translateY(-1rem);
    color: var(--color-primary);
}

.about__image {
    position: relative;
}

.about__image-bg{
    width: 16rem;
    height: 24rem;
    position: absolute;
    bottom: 0;
    background: var(--color-bg-4);
}

.about__image-lg{
    position: relative;
    left: 1rem;
    bottom: 1rem;
    filter: saturate(0) brightness(0.3);
    transition: 500ms ease;
}

.about__image-sm{
    position: absolute;
    top: 3rem;
    left: 8rem;
    height: 22rem;
    width: 22rem;
    overflow: hidden;
    box-shadow: 2rem 2rem 2rem rgba(0, 0, 0, 0.2);
}

.about__image:hover .about__image-sm{
    opacity: 0;
}

.about__image:hover .about__image-lg{
    filter: saturate(1) brightness(1);
    box-shadow: 0 3rem 3rem rgba(0, 0, 0, 0.2);
    border: 1rem solid var(--color-bg-4);
    top: 0;
    left: 0;
}

.about__right{
    margin-left: 4rem;
}

.about__right p{
    margin: 0 4rem 1.5rem 3rem;
}

/* ================= GALLERY ================== */

#gallery{
    margin-top: 12rem;
}

.gallery__head{
    display: flex;
    justify-content: space-between;
}

.gallery__container p{
    width: 45rem;
}

.swiper-wrapper{
    margin-top: 5rem;
    height: 37rem;
    padding-bottom: 5rem;
}

.swiper-slide{
    border: .5rem solid var(--color-bg-4);
    height: fit-content;
    max-height: 36rem;
    overflow: hidden;
    transition: var(--transition);
}

.swiper-slide:hover{
    box-shadow: 0 3rem 3rem rgba(0, 0, 0, 0.4);
}

.swiper-slide img{
    filter: saturate(0);
    cursor: grab;
    transition: var(--transition);
}

.swiper-slide:hover img{
    filter: saturate(1);
}

.swiper-pagination-bullet{
    background: var(--color-primary);
}

/* ================= EXIBITIONS ================== */
#exhibitions{
    margin-top: 10rem;
}

.exhibition__container{
    position: relative;
}

.exhibitions__empty{
    width: 26rem;
    position: absolute;
    right: 14rem;
    top: 0;
}

.exhibitions__head {
    display: grid;
    grid-template-columns: auto 10rem;
    justify-content: space-between;
    align-items: center;
}

.exhibitions__head > p{
    width: 45rem;
}

.exhibitions__btn{
    color: var(--color-primary-variant);
}

.exhibitions__btn:hover{
    transform: translateY(-1rem);
}

.exhibitions__gallery{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    margin-top: 5rem;
    gap: 3rem;
}

.exhibitions__gallery article{
    border: .5rem solid var(--color-bg-4);
    transition: var(--transition);
}

.exhibitions__gallery article:nth-child(1){
    grid-row: 1/3;
}

.exhibitions__gallery article:nth-child(4){
    grid-column: 2/4;
    grid-row: 2/3;
}

.exhibitions__gallery article img{
    height: 100%;
    filter: saturate(0);
    transition: var(--transition);
}

.exhibitions__gallery article:hover img{
    filter: saturate(1);
}

.exhibitions__gallery article:hover {
    box-shadow: 0 4rem 4rem rgba(0, 0, 0, 0.5);
}


/* ================= FOOTER ================== */

footer{
    margin-top: 7rem;
}

.footer__container{
    border-top: .5rem solid var(--color-bg-4);
    padding-top: 5rem;
}

.footer__head{
    display: flex;
    align-items: center;
    gap: 2rem;
}

.footer__btn{
    width: 5rem;
    height: 5rem;
    border: .2rem solid var(--color-primary-variant);
    border-radius: 50%;
    font-size: 3rem;
    color: var(--color-primary-variant);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
}

.footer__btn:hover {
    transform: translateY(-1rem);
    border-color: var(--color-primary);
}

.footer__links {
    margin: 3rem 0 5rem;
    display: flex;
    align-items: center;
    gap: 5rem;
}