/* -------------------- */
/* Breakpoints          */
/* -------------------- */

/* Media queries breakpoints */

/* 47rem = 752px -- mobile -> tablet */
/* 60rem = 960px -- tablet -> desktop */

/* Fluid min -> max viewport sizes */

/* (m) mobile -> (t) tablet */
/* 25rem = 400px */
/* 45rem = 720px */

/* (t) tablet -> (d) desktop */
/* 50rem = 800px */
/* 80rem = 1280px */

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

:root {
  /* colors */
  --clr-dark: 230 35% 7%; /* blue-900 / #0B0D17 / hsl(230 35% 7%) / rgb(11 13 23) */
  --clr-light: 231 77% 90%; /* blue-300 / #D0D6F9 / hsl(231 77% 90%) / rgb(208 214 249) */
  --clr-white: 0 0% 100%; /* white / #FFFFFF / hsl(0 0% 100%) / rgb(255 255 255) */

  /* font-sizes */
  --fs-900: clamp(5rem, 0rem + 20vw, 9rem); /* (m) 80px -> (t) 144px */
  --fs-800: 3.5rem; /* 56px */
  --fs-700: 1.5rem; /* 24px */
  --fs-600: 1rem; /* 16px */
  --fs-500: 1rem; /* 16px */
  --fs-400: 0.9375rem; /* 15px */
  --fs-300: 1rem; /* 16px */
  --fs-200: 0.875rem; /* 14px */

  /* font-families */
  --ff-serif: "Bellefair", serif;
  --ff-sans-cond: "Barlow Condensed", sans-serif;
  --ff-sans-normal: "Barlow", sans-serif;
}

/* Tablet */
@media (min-width: 47rem) {
  :root {
    --fs-800: 5rem; /* 80px */
    --fs-700: 2.5rem; /* 40px */
    --fs-600: 1.5rem; /* 24px */
    --fs-500: 1.25rem; /* 20px */
    --fs-400: 1rem; /* 16px */
  }
}

/* Desktop */
@media (min-width: 60rem) {
  :root {
    /* font-sizes */
    --fs-800: 6.25rem; /* 100px */
    --fs-700: 3.5rem; /* 56px */
    --fs-600: 2rem; /* 32px */
    --fs-500: 1.75rem; /* 28px */
    --fs-400: 1.125rem; /* 18px */
  }
}

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

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

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

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

/* set up the body */
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: 1.8;
  min-height: 100vh;
  min-width: 20rem; /* 320px */

  display: grid;
  grid-template-rows: min-content 1fr;

  overflow-x: hidden;
}

/* make images easier to work with */
img,
picture {
  max-width: 100%;
  display: block;
}

/* make form elements easier to work with */
input,
button,
textarea,
select {
  font: inherit;
}

/* remove animations for people who have turned them off */
@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;
  }
}

/* make sure hidden elements actually get hidden */
[hidden] {
  display: none;
}

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

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

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

.d-block {
  display: block;
}

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

.flow--space-small {
  --flow-space: 0.75rem;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-to-content {
  position: absolute;
  z-index: 9999;
  background: hsl(var(--clr-white));
  color: hsl(var(--clr-dark));
  padding: 0.5em 1em;
  margin-inline: auto;
  transform: translateY(-100%);
  transition: transform 250ms ease-in;
}

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

/* colors */

.bg-transparent {
  background-color: transparent;
}

.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));
}

/* typography */

.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-0 {
  letter-spacing: 0px;
}

.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);
  letter-spacing: 4px;
  text-transform: uppercase;
}

.numbered-title > span {
  margin-inline-end: 1.75rem;
  font-weight: 700;
  color: hsl(var(--clr-white) / 0.25);
  letter-spacing: 4.72px;
}

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

/* underline indicators */

.underline-indicators {
  list-style: none;
  margin: 0;
  padding: 0;
}

.underline-indicators a,
.underline-indicators button {
  display: block;
  cursor: pointer;
  padding: var(--underline-gap, 0.5rem) 0;
  text-decoration: none;
}

.underline-indicators > * {
  border: 0;
  border-bottom: 3px solid hsl(var(--clr-white) / 0);
}

.underline-indicators > *:hover,
.underline-indicators > *:focus {
  border-color: hsl(var(--clr-white) / 0.5);
}

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

/* navigation list */

.navigation-list {
  --underline-gap: 2rem;
  --column-gap: 3rem;
  --row-gap: 2rem;
}

.navigation-list a > span {
  margin-inline-end: 0.75rem;
  font-weight: 700;
  letter-spacing: 2.7px;
}

@media (max-width: 47rem) {
  .navigation-list {
    flex-direction: column;
  }

  .underline-indicators a,
  .underline-indicators button {
    padding-block: 0;
  }

  .navigation-list > * {
    border: 0;
    border-inline-end: 3px solid hsl(var(--clr-white) / 0);
  }
}

/* tabs list */

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

/* dot indicators */

.dot-indicators > * {
  cursor: pointer;
  border: 0;
  border-radius: 50%;
  aspect-ratio: 1;
  height: var(--tab-height, 0.625rem);
  padding: 0;
  background-color: hsl(var(--clr-white) / 0.25);
}

.dot-indicators > *:hover,
.dot-indicators > *:focus {
  background-color: hsl(var(--clr-white) / 0.5);
}

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

/* number indicators */

.number-indicators > * {
  cursor: pointer;
  border: 1px solid hsl(var(--clr-white) / 0.25);
  border-radius: 50%;
  aspect-ratio: 1;
  height: var(--tab-height, 2.5rem);
  padding: 0;
}

.number-indicators > *:hover,
.number-indicators > *:focus {
  border-color: hsl(var(--clr-white) / 1);
}

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

/* display button */

.display-button {
  position: relative;
  display: inline-grid;
  z-index: 1;
  place-items: center;
  border-radius: 50%;
  aspect-ratio: 1;
  height: var(--button-size, 9rem);
  font-size: var(--button-font-size, 1.125rem);
  text-decoration: none;
}

.display-button::after {
  content: "";
  position: absolute;
  z-index: -1;
  background: hsl(var(--clr-white) / 0.15);
  width: 100%;
  height: 100%;
  border-radius: 50%;
  opacity: 0;
  transition: opacity 500ms linear, transform 750ms ease-in-out;
}

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

/* -------------------- */
/* Components (cont.)   */
/* -------------------- */

/* primary-header */

.primary-header {
  --gap: 0;
  padding-block: 1.5rem;
  grid-template-columns: auto 1fr auto;
  justify-content: space-between;
  align-items: center;

  width: min(1440px, 100%);
  margin-inline: auto;
}

.logo {
  flex: 0 0 max-content;
  height: 2.5rem; /* (m) 40px -> (t) 48px */
  padding-inline: 1.5rem; /* (m) 24px -> (t) 40px -> (d) 64px */
  width: calc(2.5rem + 2 * 1.5rem);
}

.logo > img {
  aspect-ratio: 1;
  height: 100%;
  width: auto;
}

.primary-header > nav {
  width: 100%;
}

.primary-navigation {
  --gap: 3rem;
  --underline-gap: 2rem;
  background: hsl(var(--clr-dark) / 0.95);
}

@supports (backdrop-filter: blur(80px)) or (-webkit-backdrop-filter: blur(80px)) {
  .primary-navigation {
    background: hsl(var(--clr-white) / 0.05);
    -webkit-backdrop-filter: blur(80px);
    backdrop-filter: blur(80px);
  }
}

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

@media (max-width: 47rem) {
  .primary-navigation {
    --underline-gap: 0.5rem;
    position: fixed;
    z-index: 1000;
    height: 100vb;
    width: 70vi;
    top: 0;
    left: 100%;
    padding-block: min(20rem, 15vh);
    padding-inline: 2rem 0;
    transition: transform 500ms ease-in-out;
  }

  .primary-navigation[data-visible="true"] {
    transform: translateX(-100%);
  }

  .mobile-nav-toggle {
    display: block;
    position: absolute;
    z-index: 2000;
    right: 1.5rem;
    top: 1.5rem;
    background: transparent;
    background-image: url(assets/shared/icon-hamburger.svg);
    background-repeat: no-repeat;
    background-position: center;
    width: 1.5rem;
    height: 2.5rem;
    /* aspect-ratio: 1; */
    border: 0;
  }

  .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;
  }
}

@media (min-width: 47rem) {
  .primary-header {
    padding-block: 0;
  }

  .logo {
    height: 3rem; /* (m) 40px -> (t) 48px */
    padding-inline: 2.5rem; /* (m) 24px -> (t) 40px -> (d) 64px */
  }

  .primary-navigation {
    min-width: 30.5rem; /* (t) 488px -> (d) 664px */
    padding-inline: 2.5rem; /* (t) 40px -> (d) 64px */
    justify-content: end;
  }
}

@media (min-width: 60rem) {
  .primary-header {
    padding-block-start: 2.5rem;
  }

  .logo {
    padding-inline: 4rem; /* (m) 24px -> (t) 40px -> (d) 64px */
  }

  .primary-header::after {
    content: "";
    display: block;
    position: relative;
    height: 1px;
    width: 100%;
    margin-right: -2rem;
    background: hsl(var(--clr-white) / 0.25);
    order: 1;
    z-index: 999;
  }

  nav {
    order: 2;
  }

  .primary-navigation {
    min-width: 46rem; /* (t) 488px -> (d) 736px */
    padding-inline: 4rem; /* (t) 40px -> (d) 64px */
  }
}

/* ------------------------------ */
/* Page specific background       */
/* ------------------------------ */

body {
  background-size: cover;
  background-position: bottom center;
  background-repeat: no-repeat;
}

/* home */

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

@media (min-width: 47rem) {
  .home {
    background-position: center center;
    background-image: url(assets/home/background-home-tablet.jpg);
  }
}

@media (min-width: 60rem) {
  .home {
    background-image: url(assets/home/background-home-desktop.jpg);
  }
}

/* destination */

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

@media (min-width: 47rem) {
  .destination {
    background-position: center center;
    background-image: url(assets/destination/background-destination-tablet.jpg);
  }
}

@media (min-width: 60rem) {
  .destination {
    background-image: url(assets/destination/background-destination-desktop.jpg);
  }
}

/* crew */

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

@media (min-width: 47rem) {
  .crew {
    background-position: center center;
    background-image: url(assets/crew/background-crew-tablet.jpg);
  }
}

@media (min-width: 60rem) {
  .crew {
    background-image: url(assets/crew/background-crew-desktop.jpg);
  }
}

/* technology */

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

@media (min-width: 47rem) {
  .technology {
    background-position: center center;
    background-image: url(assets/technology/background-technology-tablet.jpg);
  }
}

@media (min-width: 60rem) {
  .technology {
    background-image: url(assets/technology/background-technology-desktop.jpg);
  }
}

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

.max-container {
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
}

.base-container {
  padding: 1.5rem; /* (m) 24px -> (t) 40px -> (d) 64px */
  width: min(100%, var(--max-width, calc(1110px + 2 * 4rem)));
  margin-inline: auto;
}

.page-title {
  text-align: center;
  margin-block-end: 1.5rem;
}

.page-content {
  --gap: 2rem;
  text-align: center;
  place-items: center;
}

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

/* home layout */

.home .page-content {
  --gap: 0;
}

.home .page-content .page-content__text {
  max-width: 512px;
}

.home .page-content .page-content__image {
  padding-block: 119px;
}

.home h1 {
  line-height: 1.1;
}

.home h1 > span {
  margin-block: 1.5rem;
}

/* destination layout */

.destination .page-content .page-content__image {
  padding: 26px 88.5px;
}

.destination .page-content .page-content__image img {
  max-width: 300px;
  width: 100%;
  height: auto;
}

.destination .page-content .page-content__text {
  max-width: 514px;
}

.destination .base-container .tab-list {
  justify-content: center;
  margin-block-end: 1.5rem; /* (m/t) 24px -> (d) 40px */
}

.destination-meta {
  flex-direction: column;
  margin-block-start: 1.5rem; /* (m/t) 24px -> (d) 40px */
  border-block-start: 1px solid hsl(var(--clr-white) / 0.25);
  padding-block-start: 1.5rem; /* (m/t) 24px -> (d) 40px */
}

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

/* crew layout */

.crew .page-content .page-content__text {
  max-width: 512px;
}

.crew-details {
  --flow-space: 1.5rem;
  min-height: 245px;
  margin-block-start: 2.5rem; /* (m) 40px -> (d) 0px */
}

.crew-details h2 {
  color: hsl(var(--clr-white) / 0.5);
  margin-block-end: 0.5rem; /* (m) 8px -> (t) 16px */
}

.crew .page-content .dot-indicators {
  justify-content: center;
  margin-block-start: 1.5rem; /* (m/t) 24px -> (d) 40px */
}

.crew .page-content .page-content__image picture {
  mask-image: linear-gradient(
    hsl(var(--clr-light) / 1) 77%,
    hsl(var(--clr-light) / 0)
  );
  mask-mode: alpha;
}

.crew .page-content .page-content__image img {
  width: 100%;
  height: auto;
}

/* technology layout */

.technology .base-container {
  --max-width: 1110px;
  padding-inline: 0;
}

.technology .base-container > .page-title {
  padding-inline: 1.5rem;
}

.technology .page-content .page-content__text {
  max-width: calc(512px + 2 * 1.5rem);
  padding-inline: 1.5rem;
}

.technology .base-container .number-list {
  justify-content: center;
  margin-block-end: 2.5rem; /* (m/t) 40px -> (d) 0px */
  --tab-height: 2.5rem; /* (m) 40px -> (t) 56px -> (d) 80px */
}

.technology-info h2 {
  color: hsl(var(--clr-white) / 0.5);
}

.technology .page-content .page-content__image {
  width: 100%;
  height: 258px; /* (m) 258px -> (t) 357px */
  margin-block-start: 4rem; /* (m/t) 64px -> (d) 0px */
  overflow: hidden;
}

.technology .page-content .page-content__image picture {
  height: 100%;
  width: 100%;
}

.technology .page-content .page-content__image img {
  object-fit: cover;
  object-position: center bottom;
  width: 100%;
  height: 100%;
}

/* layout -- tablet viewport */
@media (min-width: 47rem) {
  .base-container {
    padding: 2.5rem; /* (m) 24px -> (t) 40px -> (d) 64px */
  }

  .page-title {
    text-align: start;
  }

  /* home */

  .home .base-container {
    padding-block: 8rem; /* (m) 24px -> (t) 128px -> (d) 128px */
  }

  .home .page-content {
    min-height: 672px;
    align-content: space-between;
  }

  .home .page-content .page-content__image {
    padding-block: 0;
  }

  .home .display-button {
    --button-size: 17rem;
    --button-font-size: 2rem;
  }

  /* destination */

  .destination .page-content .page-content__image {
    padding: 42px 194px;
  }

  .destination .page-content .page-content__image img {
    max-width: 445px;
  }

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

  /* crew */

  .crew .base-container {
    padding-block-end: 0;
  }

  .crew-details {
    min-height: 231px;
  }

  .crew-details h2 {
    margin-block-end: 1rem; /* (m) 8px -> (t) 16px */
  }

  /* technology */

  .technology .base-container {
    padding-inline: 0;
  }

  .technology .base-container > .page-title {
    padding-inline: 2.5rem;
  }

  .technology .base-container .number-list {
    --tab-height: 3.5rem; /* (m) 40px -> (t) 56px -> (d) 80px */
  }

  .technology .page-content .page-content__image {
    height: 357px; /* (m) 258px -> (t) 357px */
  }
}

/* layout -- desktop viewport */
@media (min-width: 60rem) {
  .base-container {
    padding: 4rem; /* (m) 24px -> (t) 40px -> (d) 64px */
  }

  .page-content {
    text-align: left;
    grid-template-columns: repeat(2, 1fr);
    min-height: 734px;
  }

  /* home */

  .home .base-container {
    padding-block: 8rem; /* (m) 24px -> (t) 128px -> (d) 128px */
  }

  .home .page-content {
    --column-gap: 30px;
    min-height: 632px;
    align-content: end;
  }

  .home .page-content .page-content__text {
    max-width: unset;
  }

  .home .page-content .page-content__image {
    justify-self: end;
  }

  /* destination */

  .destination .base-container .tab-list {
    justify-content: start;
    margin-block-end: 2.5rem; /* (m/t) 24px -> (d) 40px */
  }

  .destination .page-content .page-content__image {
    padding: 0px 29.5px;
    width: 100%;
  }

  .destination .page-content .page-content__image img {
    max-width: unset;
  }

  .destination .page-content .page-content__text {
    max-width: 445px;
  }

  .destination-meta {
    --gap: min(6vw, 6rem);
    justify-content: start;
    margin-block-start: 2.5rem; /* (m/t) 24px -> (d) 40px */
    padding-block-start: 2.5rem; /* (m/t) 24px -> (d) 40px */
  }

  /* crew */

  .crew .page-content .page-content__text {
    max-width: unset;
    height: 100%;
    display: grid;
    grid-template-rows: 1fr min-content;
  }

  .crew-details {
    margin-block-start: 0; /* (m) 40px -> (d) 0px */
    align-self: center;
  }

  .crew .page-content .dot-indicators {
    justify-content: start;
    margin-block-start: 2.5rem; /* (m/t) 24px -> (d) 40px */
    padding-block-end: 3rem; /* (m/t) 0px -> (d) 48px */
    --tab-height: 0.9375rem;
  }

  /* technology */

  .technology .base-container {
    --max-width: calc(1275px + 4rem);
    padding-inline: 4rem 0;
    margin-inline-end: 0;
  }

  .technology .base-container > .page-title {
    padding-inline: 0 4rem;
  }

  .technology .page-content {
    grid-template-columns: 1.04441fr 1fr;
  }

  .technology .page-content .page-content__text {
    max-width: unset;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 4rem;
  }

  .technology .base-container .number-list {
    flex-direction: column;
    margin-block-end: 0; /* (m/t) 40px -> (d) 0px */
    --tab-height: 5rem; /* (m) 40px -> (t) 56px -> (d) 80px */
  }

  .technology .page-content .page-content__image {
    order: 2;
    margin-block-start: 0; /* (m/t) 64px -> (d) 0px */
    height: 600px;
  }
}

/* -------------------- */
/* Design system (only) */
/* -------------------- */

.design-system .numbered-title > span {
  color: hsl(var(--clr-white) / 0.61);
}

.section {
  padding: 4.5rem 5rem;
  max-width: calc(1110px + 2 * 5rem);
  margin-inline: auto;
}

.inner-section {
  border: 1px dashed white;
  margin-block-start: 0.5rem;
  padding: 2rem;
  container-type: inline-size;
}

.subsection__heading {
  padding-block-end: 1.5rem;
  border-block-end: 1px solid hsl(var(--clr-white) / 0.15);
  margin-block-end: 1.5rem;
}

.section-heading > h3 {
  font-weight: 700;
}

.color-swatch {
  padding: 3rem 1rem 1rem;
  border: 1px solid white;
}

.label-value-pair {
  display: flex;
  flex-wrap: wrap;
  gap: var(--pair-gap, 1rem); /* 48px */
}

.label-value-pair :first-child {
  font-weight: 700;
}

.box {
  content: "";
  width: var(--width, 1rem);
  height: var(--height, 2.625rem);
}

.grid-auto-cols {
  --column-width: min(var(--col-min-size, 10rem), 100%);
  grid-template-columns: repeat(auto-fit, minmax(var(--column-width), 1fr));
}

.w-1600 {
  --width: 128px;
}

.w-1200 {
  --width: 96px;
}

.w-1000 {
  --width: 80px;
}

.w-800 {
  --width: 64px;
}

.w-600 {
  --width: 48px;
}

.w-500 {
  --width: 40px;
}

.w-400 {
  --width: 32px;
}

.w-300 {
  --width: 24px;
}

.w-200 {
  --width: 16px;
}

.w-150 {
  --width: 12px;
}

.w-100 {
  --width: 8px;
}

.w-50 {
  --width: 4px;
}

.w-25 {
  --width: 2px;
}