/* ------------------------ */
/* Custom properties        */
/* ------------------------ */
:root {
    /* colors */
    --clr-dark: 230 35% 7%;
    --clr-light: 231 77% 90%;
    --clr-white: 0 0% 100%;
  
    /* font sizes */
    --fs-900: clamp(5rem, 8vw + 1rem, 9.375rem);
    --fs-800: 3.5rem;
    --fs-700: 1.5rem;
    --fs-600: 1rem;
    --fs-500: 1rem;
    --fs-400: 0.9375rem;
    --fs-300: 1rem;
    --fs-200: 0.875rem;
  
    /* font-families */
    --ff-serif: " Bellefair", serif;
    --ff-sans-cond: "Barlow Condensed", sans-serif;
    --ff-sans-normal: "Barlow", sans-serif;
  }
  
  @media (min-width: 35em) {
    :root {
      /* font sizes */
      --fs-800: 5rem;
      --fs-700: 2.5rem;
      --fs-600: 1.5rem;
      --fs-500: 1.25rem;
      --fs-400: 1rem;
    }
  }
  
  @media (min-width: 45em) {
    :root {
      /* font sizes */
      --fs-800: 6.25rem;
      --fs-700: 3.5rem;
      --fs-600: 2rem;
      --fs-500: 1.75rem;
      --fs-400: 1.125rem;
    }
  }
  
  /* ------------------------ */
  /* Reset                    */
  /* ------------------------ */
  
  /* https://piccalil.li/blog/a-modern-css-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,
  h6,
  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: 1.5;
    min-height: 100vh;
  
    display: grid;
    grid-template-rows: min-content 1fr;
  
    overflow-x: hidden;
  }
  
  /* make images easier to work with */
  img,
  picture {
    max-width: 100%;
    /* display: block; */ /* prevents the hidden attribute from working*/
  }
  
  img {
    display: block;
  }
  
  /* make forms easier to work with */
  input,
  button,
  textarea,
  select {
    font: inherit;
  }
  
  /* remove animation for people who've 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;
    }
  }
  
  /* ------------------------ */
  /* Utility classes          */
  /* ------------------------ */
  
  /* general */
  
  .flex {
    display: flex;
    gap: var(--gap, 1rem);
  }
  
  .grid {
    display: grid;
    gap: var(--gap, 1rem);
  }
  
  .d-block {
    display: block;
  }
  
  .flow > *:where(:not(:first-child)) {
    margin-top: var(--flow-space, 1rem);
  }
  
  .flow--space-small {
    --flow-space: 0.5rem;
  }
  
  .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);
    white-space: nowrap; /* added line */
    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-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-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: 0.5em;
    font-weight: 700;
    color: hsl(var(--clr-white) / 0.25);
  }
  
  /* ------------------------ */
  /* Components               */
  /* ------------------------ */
  
  .large-button {
    font-size: 2rem;
    position: relative;
    display: inline-grid;
    z-index: 1;
    place-items: center;
    padding: 0 2em;
    border-radius: 50%;
    aspect-ratio: 1;
    text-decoration: none;
  }
  
  .large-button::after {
    content: "";
    position: absolute;
    z-index: -1;
    inset: 0;
    background-color: hsl(var(--clr-white) / 0.25);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 500ms linear, transform 750ms ease-in-out;
  }
  
  .large-button:hover::after,
  .large-button:focus::after {
    opacity: 1;
    transform: scale(1.5);
  }
  
  /* primary-header */
  
  .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;
    margin: 0;
    padding: 0;
    background-color: hsl(var(--clr-dark) / 0.95);
  }
  
  @supports (backdrop-filter: blur(1rem)) {
    .primary-navigation {
      background-color: hsl(var(--clr-white) / 0.05);
      backdrop-filter: blur(1.5rem);
    }
  }
  
  .primary-navigation a {
    text-decoration: none;
  }
  
  .primary-navigation a > span {
    margin-right: 0.5em;
    font-weight: 700;
  }
  
  .mobile-nav-toggle {
    display: none;
  }
  
  @media (max-width: 35rem) {
    .primary-navigation {
      --underline-gap: 0.5rem;
      position: fixed;
      z-index: 1000;
      inset: 0 0 0 30%;
      padding: min(20rem, 15vh) 0 min(20rem, 15vh) 2rem;
      flex-direction: column;
      transform: translateX(100%);
      transition: transform 250ms ease-in-out;
    }
  
    .primary-navigation[data-visible="true"] {
      transform: translateX(0);
    }
  
    .primary-navigation.underline-indicators > * {
      border: 0;
      border-right: 0.2rem solid hsl(var(--clr-white) / 0);
    }
  
    .primary-navigation.underline-indicators > *:hover,
    .primary-navigation.underline-indicators > *:focus {
      border: 0;
      border-right: 0.2rem solid hsl(var(--clr-white) / 0.5);
    }
    .primary-navigation.underline-indicators > .active {
      border: 0;
      border-right: 0.2rem solid hsl(var(--clr-white) / 1);
    }
  
    .mobile-nav-toggle {
      display: block;
      position: absolute;
      z-index: 2000;
      right: 1rem;
      top: 2rem;
      background: transparent;
      background-image: url(./assets/shared/icon-hamburger.svg);
      background-repeat: no-repeat;
      background-position: center;
      width: 1.5rem;
      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: 35rem) {
    .primary-navigation {
      padding-inline: clamp(3rem, 7vw, 7rem);
    }
  }
  
  @media (min-width: 35rem) and (max-width: 44.999rem) {
    nav #primary-navigation {
      padding-left: 30px;
      padding-top: -5px;
      padding-bottom: -5px;
    }
    .primary-navigation a > span {
      display: none;
    }
  }
  
  @media (min-width: 45rem) {
    .primary-header::after {
      content: "";
      display: block;
      position: relative;
      height: 1px;
      width: 100%;
      margin-right: -2.5rem;
      background: hsl(var(--clr-white) / 0.25);
      order: 1;
    }
  
    nav {
      order: 2;
    }
  
    .primary-navigation {
      margin-block: 2rem;
    }
  }
  
  .underline-indicators > * {
    cursor: pointer;
    background-color: transparent;
    padding: var(--underline-gap, 0.5rem) 0;
    border: 0;
    border-bottom: 0.2rem 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) / 1);
    border-color: hsl(var(--clr-white) / 1);
  }
  
  .tab-list {
    --gap: 2rem;
  }
  
  .dot-indicators > * {
    cursor: pointer;
    border: 0;
    border-radius: 50%;
    padding: 0;
    width: 1rem;
    height: 1rem;
    background-color: hsl(var(--clr-white) / 0.2);
  }
  .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 > * {
    cursor: pointer;
    display: grid;
    place-items: center;
    background-color: hsl(var(--clr-dark));
    color: hsl(var(--clr-white));
    font-family: var(--ff-serif);
    width: 3em;
    height: 3em;
    border: 1px solid hsl(var(--clr-white) / 0.2);
    border-radius: 50%;
  }
  .number-indicators > *:hover,
  .number-indicators > *:focus {
    border: 1px solid hsl(var(--clr-white));
  }
  .number-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-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-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-image: url(./assets/technology/background-technology-tablet.jpg);
    }
  }
  
  @media (min-width: 45rem) {
    .technology {
      background-image: url(./assets/technology/background-technology-desktop.jpg);
    }
  }
  
  /* booking */
  
  .booking {
    background-image: url(./assets/booking/background-booking-mobile.jpg);
    background-color: hsl(var(--clr-dark)); /* Solid fallback for missing images */
  }
  
  @media (min-width: 35rem) {
    .booking {
      background-image: url(./assets/booking/background-booking-tablet.jpg);
      background-color: hsl(var(--clr-dark));
    }
  }
  
  @media (min-width: 45rem) {
    .booking {
      background-image: url(./assets/booking/background-booking-desktop.jpg);
      background-color: hsl(var(--clr-dark));
    }
  }
  
  /* form styling */
  
  input[type="text"],
  input[type="email"],
  select {
    padding: 0.5rem;
    border: 1px solid hsl(var(--clr-white) / 0.5);
    border-radius: 4px;
    width: 100%;
    max-width: 300px;
    background-color: hsl(var(--clr-dark));
    color: hsl(var(--clr-light)); /* Use accent for better contrast */
    transition: border-color 300ms ease, transform 200ms ease;
  }
  
  input:focus,
  select:focus {
    border-color: hsl(var(--clr-white));
    transform: scale(1.02);
    outline: none;
  }
  
  label {
    margin-bottom: 0.25rem;
    color: hsl(var(--clr-light)); /* Use accent for labels */
  }
  
  /* layout for booking page */
  
  .grid-container--booking {
    text-align: center;
    display: grid;
    place-items: center;
    padding-inline: 1rem;
    padding-bottom: 4rem;
    animation: fadeIn 500ms ease-in;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  @media (min-width: 45em) {
    .grid-container--booking {
      text-align: left;
      column-gap: var(--container-gap, 2rem);
      grid-template-columns: minmax(1rem, 1fr) repeat(2, minmax(0, 40rem)) minmax(1rem, 1fr);
    }
    .grid-container--booking > *:first-child {
      grid-column: 2;
    }
    .grid-container--booking > *:last-child {
      grid-column: 3;
    }
  }
  
  /* ------------------------ */
  /* Layout                   */
  /* ------------------------ */
  
  .grid-container {
    text-align: center;
    display: grid;
    place-items: center;
    padding-inline: 1rem;
    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) / 0.1);
    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"
      "dots"
      "content";
  }
  
  .grid-container--crew > picture {
    grid-area: image;
    max-width: 60%;
    border-bottom: 1px solid hsl(var(--clr-white) / 0.1);
  }
  
  .grid-container--crew > .dot-indicators {
    grid-area: dots;
  }
  
  .grid-container--crew > .crew-details {
    grid-area: content;
  }
  
  .crew-details h2 {
    color: hsl(var(--clr-white) / 0.5);
  }
  
  /* technology layout */
  .grid-container--technology {
    --flow-space: 0.5rem;
    padding-inline: 0;
    grid-template-areas:
      "title"
      "image"
      "numbers"
      "content";
  }
  
  .grid-container--technology > picture {
    grid-area: image;
  }
  
  .grid-container--technology > .number-indicators {
    grid-area: numbers;
  }
  
  .grid-container--technology > .technology-details {
    padding-inline: 1rem;
    max-width: 50ch;
    grid-area: content;
  }
  
  @media (min-width: 35rem) {
    .numbered-title {
      justify-self: start;
      margin-top: 2rem;
    }
  
    .destination-meta {
      flex-direction: row;
      justify-content: space-evenly;
    }
  
    .grid-container--crew {
      padding-bottom: 0;
      grid-template-areas:
        "title"
        "content"
        "dots"
        "image";
    }
  
    .grid-container--technology > .numbered-title {
      padding-inline: 1rem;
    }
  }
  
  @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, 40rem)) minmax(
          1rem,
          1fr
        );
    }
  
    .grid-container--home {
      padding-bottom: max(6rem, 20vh);
      align-items: end;
    }
    .grid-container--home > *:first-child {
      grid-column: 2;
    }
    .grid-container--home > *: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 {
      --container-gap: 5rem;
      justify-items: start;
      align-content: start;
      align-content: center;
      grid-template-columns: minmax(1rem, 1fr) minmax(0, 37rem) minmax(0, 23rem) minmax(
          1rem,
          1fr
        );
      grid-template-areas:
        ".  title  title ."
        ". content image ."
        ".  dots   image .";
    }
  
    .grid-container--crew > picture {
      grid-column: span 2;
      align-self: end;
      justify-self: center;
      max-width: 90%;
    }
  
    .grid-container--technology {
      grid-template-columns: minmax(1rem, 1fr) 4rem repeat(2, minmax(0, 35rem));
      grid-template-areas:
        ". title title title"
        ". numbers content image";
    }
  
    .grid-container--technology > .number-indicators {
      --gap: 2rem;
      display: flex;
      flex-direction: column;
    }
    .grid-container--technology > .number-indicators > * {
      font-size: var(--fs-600);
      width: 5rem;
      height: 5rem;
    }
  
    .grid-container--technology > picture {
      justify-self: end;
    }
  }