/* ------------------ */ 
/* Custom             */ 
/* ------------------ */ 

:root {
  --clr-dark: 230 35% 7%;
  --clr-light: 231 77% 90%;
  --clr-white: 0 0% 100%;

  --fs-900: clamp(5rem, 8vw + 1rem, 9.375rem);
  --fs-800: 3.5rem;
  --fs-700: 1.5rem;
  --fs-600: 1.125rem;
  --fs-500: 1rem;
  --fs-400: 0.938rem;
  --fs-300: 0.875rem;

  --ff-serif: "Bellefair", serif;
  --ff-sans-cond: "Barlow Condensed", sans-serif;
  --ff-sans-normal: "Barlow", sans-serif;
}

@media (min-width: 35em) {
  :root {
    --fs-800: 5rem;
    --fs-700: 2.5rem;
    --fs-600: 1.5rem;
    --fs-500: 1.25rem;
    --fs-400: 1rem;
  }
}

@media (min-width: 45em) {
  :root {
    --fs-800: 6rem;
    --fs-700: 3.5rem;
    --fs-600: 2rem;
    --fs-500: 1.75rem;
    --fs-400: 1.125rem;
    --fs-300: 1rem;
    --fs-200: 0.875rem;
  }
}

/* ------------------ */ 
/* Reset              */ 
/* ------------------ */ 

*,
*::before,
*::after {
  box-sizing: border-box;
}

body,
h1,
h2,
h3,
h4,
h5,
p,
figure,
picture {
  margin: 0;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
  font-weight: 400;
}

body {
  font-family: var(--ff-sans-normal);
  font-size: var(--fs-400);
  color: hsl( var(--clr-white) );
  background-color: hsl( var(--clr-dark) );
  line-height: 1.5;
  min-height: 100vh;
  display: grid;
  grid-template-rows: min-content 1fr;
  overflow-x: hidden;
}

img,
picture {
  max-width: 100%;
  display: block;
}

picture[hidden] {
  display: none;
}

input,
button,
textarea,
select {
  font: inherit;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ------------------ */ 
/* Utility            */ 
/* ------------------ */ 

.flex {
  display: flex;
  gap: var(--gap, 1rem);
}

.grid {
  display: grid;
  gap: var(--gap, 1rem);
}

.d-block {
  display: block;
}

.d-inline-block {
  display: inline-block;
  margin-top: 1.5rem;
}

/* .flow > * + * { */
.flow > *:where(:not(:first-child)) {
  margin-top: var(--flow-space, 1rem);
}

.flow--space--small {
  --flow-space: .75em;
}

.container {
  padding-inline: 2rem;
  margin-inline: auto;
  max-width: 80rem;
}

/* screen-reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-to-content {
  position: absolute;
  z-index: 9999;
  background: hsl( var(--clr-white) );
  color: hsl( var(--clr-dark) );
  padding: .5em 1em;
  margin-inline: auto;
  transform: translateY(-100%);
  transition: transform 250ms ease-in;
}

.skip-to-content:focus {
  transform: translateY(0);
}

.bg-dark { background-color: hsl( var(--clr-dark) );}
.bg-accent { background-color: hsl( var(--clr-light) );}
.bg-white { background-color: hsl( var(--clr-white) );}
.text-dark { color: hsl( var(--clr-dark) );}
.text-accent { color: hsl( var(--clr-light) );}
.text-white { color: hsl( var(--clr-white) );}

.ff-serif { font-family: var(--ff-serif); }
.ff-sans-cond { font-family: var(--ff-sans-cond); }
.ff-sans-normal { font-family: var(--ff-sans-normal); }

.letter-spacing-1 { letter-spacing: 4.75px; }
.letter-spacing-2 { letter-spacing: 2.7px; }
.letter-spacing-3 { letter-spacing: 2.35px; }

.uppercase { text-transform: uppercase; }

.fs-900 { font-size: var(--fs-900); }
.fs-800 { font-size: var(--fs-800); }
.fs-700 { font-size: var(--fs-700); }
.fs-600 { font-size: var(--fs-600); }
.fs-500 { font-size: var(--fs-500); }
.fs-400 { font-size: var(--fs-400); }
.fs-300 { font-size: var(--fs-300); }
.fs-200 { font-size: var(--fs-200); }

.fs-900,
.fs-800,
.fs-700,
.fs-600 {
  line-height: 1.1;
}

.numbered-title {
  font-family: var(--ff-sans-cond);
  font-size: var(--fs-500);
  text-transform: uppercase;
  letter-spacing: 4.72px;
}

.numbered-title span {
  margin-right: .5em;
  font-weight: 700;
  color: hsl( var(--clr-white) / .25 );
}

/* ------------------ */ 
/* Components         */ 
/* ------------------ */ 

.large-button {
  font-size: var(--fs-600);
  position: relative;
  z-index: 1;
  display: inline-grid;
  place-items: center;
  padding: 0 2em;
  border-radius: 50%;
  aspect-ratio: 1;
  text-decoration: none;
}

@media (min-width: 35rem) {
  .large-button {
    font-size: 2rem;
    margin-top: 4.125rem;
  }
}

@media (min-width: 45rem) {
  .large-button {
    margin-top: 0;
  }
}

.large-button::after {
  content: '';
  position: absolute;
  z-index: -1;
  width: 100%;
  height: 100%;
  background: hsl( var(--clr-white) / .1);
  border-radius: 50%;
  opacity: 0;
  transition: opacity 500ms linear, transform 750ms ease-in-out;
}

.large-button:hover::after,
.large-button:focus::after {
  transform: scale(1.5);
  opacity: 1;
}

.logo {
  margin: 1.5rem clamp(1.5rem, 5vw, 3.5rem);
}

.primary-header {
  justify-content: space-between;
  align-items: center;
}

.primary-navigation {
  --gap: clamp(1.5rem, 5vw, 3.5rem);
  --underline-gap: 2rem;
  list-style: none;
  padding: 0;
  margin: 0;
  background: hsl( var(--clr-black) / .095 );
}

.primary-navigation a {
  text-decoration: none;
}

.primary-navigation a > span {
  font-weight: 700;
  margin-right: .5em;
}

@supports (backdrop-filter: blur(1rem)) {
  .primary-navigation {
    background: hsl( var(--clr-white) / .05 );
    backdrop-filter: blur(2rem);
  }
}

.mobile-nav-toggle {
  display: none;
}

@media (max-width: 35rem) {
  .primary-navigation {
    --underline-gap: .5rem;
    position: fixed;
    z-index: 1000;
    inset: 0 0 0 30%;
    list-style: none;
    padding: min(20rem, 15vh) 2rem;
    padding-right: 0;
    margin: 0;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 500ms ease-in-out;
  }

  .primary-navigation[data-visible="true"] {
    transform: translateX(0);
  }

  .mobile-nav-toggle {
    display: block;
    position: absolute;
    z-index: 2000;
    top: 2rem;
    right: 1rem;
    border: 0;
    background: transparent;
    background-image: url(./assets/shared/icon-hamburger.svg);
    background-position: center;
    background-repeat: no-repeat;
    width: 1.5rem;
    aspect-ratio: 1;
  }

  .mobile-nav-toggle[aria-expanded="true"] {
    background-image: url(./assets/shared/icon-close.svg);
  }

  .mobile-nav-toggle:focus-visible {
    outline: 5px solid white;
    outline-offset: 5px;
  }

  /* sideline for hamburger menu */
  .sideline-indicators > * {
    padding: 0;
    border: 0;
    border-right: .2rem solid hsl( var(--clr-white) / 0);
    background-color: transparent;
  }
  
  .sideline-indicators > .active {
    border-color: hsl( var(--clr-white) / 1);
  }
}

@media (min-width: 35em) {
  .primary-navigation {
    padding-inline: clamp(3rem, 7vw, 7rem);
  }
}

@media (min-width: 45em) {
  .primary-header::after {
    content: '';
    display: block;
    position: relative;
    height: 1px;
    width: 100%;
    margin-right: -2.5rem;
    background: hsl( var(--clr-white) / .25);
    order: 1;
  }

  nav {
    order: 2;
  }

  .primary-navigation {
    margin-block: 2rem;
  }
}

@media (min-width: 35em) {
  .underline-indicators > * {
    cursor: pointer;
    padding: var(--underline-gap, .5rem) 0;
    border: 0;
    border-bottom: .2rem solid hsl( var(--clr-white) / 0);
    background-color: transparent;
  }

  .underline-indicators > *:hover,
  .underline-indicators > *:focus {
    border-color: hsl( var(--clr-white) / .5);
  }
  
  .underline-indicators > .active,
  .underline-indicators > [aria-selected="true"] {
    color: hsl( var(--clr-white) / 1 );
    border-color: hsl( var(--clr-white) / 1);
  }
}

.tab-list {
  --gap: 2rem;
}

.tab-list > * {
  cursor: pointer;
  padding: var(--underline-gap, .5rem) 0;
  border: 0;
  border-bottom: .2rem solid hsl( var(--clr-white) / 0);
  background: transparent;
}

.tab-list > *:hover,
.tab-list > *:focus {
  border-color: hsl( var(--clr-white) / .5);
}

.tab-list > .active,
.tab-list > [aria-selected="true"] {
  color: hsl( var(--clr-white) / 1 );
  border-color: hsl( var(--clr-white) / 1);
}

.dot-indicators > * {
  cursor: pointer;
  border: 0;
  border-radius: 50%;
  padding: .5em;
  background-color: hsl( var(--clr-white) / .25);
}

.dot-indicators > *:hover,
.dot-indicators > *:focus {
  background-color: hsl( var(--clr-white) / .5);
}

.dot-indicators > [aria-selected="true"] {
  background-color: hsl( var(--clr-white) / 1);
}

.num-indicators > * {
  cursor: pointer;
  border: 1px solid hsl( var(--clr-white) / .25 );
  border-radius: 50%;
  width: 2.5rem;
  aspect-ratio: 1;
  color: hsl( var(--clr-white) );
  background-color: transparent;
}

.num-indicators > *:hover,
.num-indicators > *:focus {
  border-color: hsl( var(--clr-white) );
}

.num-indicators > [aria-selected="true"] {
  background-color: hsl( var(--clr-white) );
  color: hsl( var(--clr-dark) );
}

/* ---------------------------- */ 
/* Page Specific Background     */ 
/* ---------------------------- */ 

body {
  background-size: cover;
  background-position: bottom center;
}

/* Home */
.home {
  background-image: url(./assets/home/background-home-mobile.jpg);
}

@media (min-width: 35rem) {
  .home {
    background-position: center center;
    background-image: url(./assets/home/background-home-tablet.jpg);
  }
}

@media (min-width: 45rem) {
  .home {
    background-image: url(./assets/home/background-home-desktop.jpg);
  }
}

/* Destination */
.destination {
  background-image: url(./assets/destination/background-destination-mobile.jpg);
}

@media (min-width: 35rem) {
  .destination {
    background-position: center center;
    background-image: url(./assets/destination/background-destination-tablet.jpg);
  }
}

@media (min-width: 45rem) {
  .destination {
    background-image: url(./assets/destination/background-destination-desktop.jpg);
  }
}

/* Crew */
.crew {
  background-image: url(./assets/crew/background-crew-mobile.jpg);
}

@media (min-width: 35rem) {
  .crew {
    background-position: center center;
    background-image: url(./assets/crew/background-crew-tablet.jpg);
  }
}

@media (min-width: 45rem) {
  .crew {
    background-image: url(./assets/crew/background-crew-desktop.jpg);
  }
}

/* Technology */
.technology {
  background-image: url(./assets/technology/background-technology-mobile.jpg);
}

@media (min-width: 35rem) {
  .technology {
    background-position: center center;
    background-image: url(./assets/technology/background-technology-tablet.jpg);
  }
}

@media (min-width: 45rem) {
  .technology {
    background-image: url(./assets/technology/background-technology-desktop.jpg);
  }
}

/* ------------------ */ 
/* Layout             */ 
/* ------------------ */ 

.grid-container {
  display: grid;
  text-align: center;
  place-items: center;
  padding-inline: 1.5rem;
  padding-bottom: 4rem;
}

.grid-container p:not([class]) {
  max-width: 50ch;
}

.numbered-title {
  grid-area: title;
}

/* Destination layout */
.grid-container--destination {
  --flow-space: 2rem;
  grid-template-areas: 
    'title'
    'image'
    'tabs'
    'content';
}

.grid-container--destination > picture {
  grid-area: image;
  max-width: 60%;
  align-self: start;
}

.grid-container--destination > .tab-list {
  grid-area: tabs;
}

.grid-container--destination > .destination-info {
  grid-area: content;
}

.destination-meta {
  flex-direction: column;
  border-top: 1px solid hsl( var(--clr-white) / .1);
  padding-top: 2.5rem;
  margin-top: 2.5rem;
}

.destination-meta p {
  font-size: 1.75rem;
}

/* Crew layout */
.grid-container--crew {
  --flow-space: 2rem;
  grid-template-areas: 
    'title'
    'image'
    'tabs'
    'content';
}

.grid-container--crew > picture {
  grid-area: image;
  max-width: 60%;
  border-bottom: 1px solid hsl( var(--clr-white) / .1 );
}

.grid-container--crew > .dot-indicators {
  grid-area: tabs;
}

.grid-container--crew > .crew-details {
  grid-area: content;
}

.crew-details h2 {
  color: hsl( var(--clr-white) / .5 );
}

/* Technology layout */
.grid-container--technology {
  padding-inline: 0;
}

.grid-container--technology {
  --flow-space: 2rem;
  grid-template-areas: 
    'title'
    'image'
    'tabs'
    'content';
}

.grid-container--technology > .numbered-title {
  padding-inline: 1.5rem;
}

.grid-container--technology > picture {
  grid-area: image;
  width: 100%;
  max-height: 18rem;
  overflow: hidden;
  margin-top: 5rem;
}

.grid-container--technology > picture > img {
  width: 100%;
  height: auto;
  transform: translateY(-6rem);
}

.grid-container--technology > .num-indicators {
  grid-area: tabs;
}

.grid-container--technology > .technology-details {
  grid-area: content;
  padding-inline: 1.5rem;
}

.technology-details h2 {
  color: hsl( var(--clr-white) / .5 );
}

.landscape {
  display: none;
}

@media (min-width: 35em) {
  .numbered-title {
    justify-self: start;
    margin-top: 2rem;
  }

  .destination-meta {
    flex-direction: row;
    justify-content: space-evenly;
  }

  .grid-container--home {
    padding-inline: 5.5rem;
    margin: 8rem 0 2.5rem 0;
  }

  .grid-container--crew {
    padding-bottom: 0;
    grid-template-areas: 
      'title'
      'content'
      'tabs'
      'image';
  }

  .landscape {
    display: block;
  }

  .portrait {
    display: none;
  }

  .grid-container--technology > picture {
    width: 100%;
    height: 100%;
    overflow: visible;
  }
  
  .grid-container--technology > picture > img {
    height: 100%;
    object-fit: cover;
    transform: translateY(0);
  }

  .grid-container--technology > .technology-details {
    padding-inline: 5.5rem;
  }
}

@media (min-width: 45em) {
  .grid-container {
    text-align: left;
    column-gap: var(--container-gap, 2rem);
    grid-template-columns: minmax(1rem, 1fr) repeat(2, minmax(0, 30rem)) minmax(1rem, 1fr);
  }

  .grid-container--home {
    padding-bottom: max(6rem, 20vh);
    align-items: end;
  }

  .grid-container--home > *:first-child {
    grid-column: 2;
  }

  .grid-containe--homer > *:last-child {
    grid-column: 3;
  }

  .grid-container--destination {
    justify-items: start;
    align-content: start;
    grid-template-areas: 
      '. title title .'
      '. image tabs .'
      '. image content .';
  }

  .grid-container--destination > picture {
    max-width: 90%;
  }

  .destination-meta {
    --gap: min(6vw, 6rem);
    justify-content: start;
  }

  .grid-container--crew {
    grid-template-columns: minmax(1rem, 1fr) minmax(0, 37rem) minmax(0, 23rem) minmax(1rem, 1fr);
    justify-items: start;
    grid-template-areas: 
      '. title title .'
      '. content image .'
      '. tabs image .';
  }

  .grid-container--crew > picture {
    grid-column: span 2;
    align-self: end;
    max-width: 90%;
  }

  .grid-container--technology {
    grid-template-columns: minmax(1rem, 1fr) minmax(0, 5rem) minmax(0, 33rem) minmax(0, 38rem);
    justify-items: start;
    grid-template-areas: 
      '. title title .'
      '. tabs content image'
      '. tabs content image';
  }

  .num-indicators {
    flex-direction: column;
    --gap: 2rem;
  }

  .num-indicators > * {
    width: 5rem;
    font-size: var(--fs-600);
  }

  .grid-container--technology > .technology-details {
    padding-inline: 0;
    margin-left: 2rem;
  }

  .grid-container--technology {
    padding-bottom: 8rem;
  }

  .landscape {
    display: none;
  }

  .portrait {
    display: block;
  }

  .grid-container--technology > picture {
    max-height: 37.5rem;
  }
}