/* ------------------- */
/* 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;
}

/* Tablet sizes */
@media (min-width: 35rem) {
    .root {
        /* font-sizes */
            --fs-900: 9.375rem;
            --fs-800: 5rem;
            --fs-700: 2.5rem;
            --fs-600: 1.5rem;
            --fs-500: 1.25rem;
            --fs-400: 1rem;
    }

}

/* Desktop sizes */
@media (min-width: 45rem) {
    :root {
        --fs-800: 6.25rem;
        --fs-700: 3.5rem;
        --fs-600: 2rem;
        --fs-500: 1.75rem;
        --fs-400: 1.125rem;
        --fs-300: 1rem;
        --fs-200: 0.875rem;
    }
    .primary-header {
        justify-content: space-between;
        align-items: center;
        position: relative; /* anchor for ::after */
    }

    .primary-navigation::after {
        content: '';
        position: absolute;
        top: 50%;
        right: 100%;
        width: calc(100vw - 100% - clamp(6rem, 10vw, 8rem));
        height: 1px;
        justify-content: space-between;
        align-items: center;
        background-color: hsl(var(--clr-light) / 1);
        transform: translateY(-50%);
        pointer-events: none;
    }
}

/* ------------------- */
/* 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: auto 1fr auto;

    overflow-x: hidden;
}

/* to stack up objects */
.stack {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 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'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);
}

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

.grid-container {
    display: grid;
    text-align: center;
    padding-inline: 2rem;
    place-items: center;
    column-gap: var(--container-gap, 1.5rem);
    row-gap: var(--container-gap, 1.5rem);
    grid-template-columns: 1fr;
}

.grid-container >* {
    max-width: 45ch;
}

/* Tablet and up */
@media (min-width: 45rem) {
    .grid-container {
        padding-inline: 2rem;
        column-gap: var(--container-gap, 2rem);
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Medium screens need space below the fixed navigation bar */
@media (min-width: 40rem) and (max-width: 64.9999rem) {
    .grid-container--home {
        padding-top: 9rem;
        row-gap: 3rem;
    }
}

/* Desktop and up */
@media (min-width: 65rem) {
    .grid-container {
        grid-template-columns: minmax(0, 1.2fr) auto;
        padding-inline: min(7vw, 8rem);
        align-items: end;
    }

    .grid-container--home {
        padding-top: 5rem;
        padding-bottom: max(6rem, 18vh);
        column-gap: 6rem;
    }

    .grid-container--home > div:first-child {
        text-align: left;
        justify-self: start;
        max-width: 42rem;
    }

    .grid-container--home > div:last-child {
        justify-self: end;
        align-self: end;
    }

    .grid-container--home p {
        max-width: 38rem;
    }
}

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

.text-dark { color: hsl( var(--clr-dark) );}
.text-light { 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: .5em;
    font-weight: 700;
    color: hsl( var(--clr-white) / .25);
}


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

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

.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 {
    opacity: 1;
    transform: scale(1.5);
}

/* primary header */

.logo {
    margin: 1.5rem clamp(1.5rem, 5vw, 3.5rem);
    padding-top: 0;
}

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

.primary-navigation {
    --gap: clamp(2rem, 5vw, 3.5rem);
    --underline-gap: 2rem;
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
}

.primary-navigation a {
    display: inline-block;
    padding: var(--underline-gap, 1rem) 0;
    text-decoration: none;
    border: 0;
    border-bottom: .2rem solid transparent;
}

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

/* Mobile only - right side full height */
@media (max-width: 39.9999rem) {
    .primary-navigation {
        --underline-gap: 0.5rem;
        position: fixed;
        z-index: 1000;
        list-style: none;
        inset: 0 0 0 auto;
        width: 70%;
        margin: 0;
        padding: min(20rem, 10vh) 2rem;
        height: 100vh;
        flex-direction: column;

        /* background-color and blur effect */
        background-color: hsl(var(--clr-white) / .1);
        backdrop-filter: blur(1.5rem);
        -webkit-backdrop-filter: blur(1.5rem); /* for Safari browser*/
        transform: translateX(100%);
        transition: transform 500ms ease-in-out;
    }

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

/* Desktop and up - left side */
@media (min-width: 40rem) {
    .logo {
        position: fixed;
        top: 2.75rem;
        left: clamp(1.5rem, 5vw, 3.5rem);
        margin: 0;
    }

    .primary-navigation {
        --underline-gap: 0.75rem;
        position: fixed;
        top: 1rem;
        right: 0;
        gap: clamp(1.75rem, 2.5vw, 2.5rem);
        padding: 0.75rem 1.5rem;
        width: fit-content;
        flex-direction: row;

        /* background-color and blur effect */
        background-color: hsl(var(--clr-white) / .1);
        backdrop-filter: blur(1.5rem);
        -webkit-backdrop-filter: blur(1.5rem); /* for Safari browser*/
    }
}

/* for Firefox broswer */
@supports (backdrop-filter: blur(1rem)) {
    .primary-navigation {
        background: hsl( var(--clr-white) / 0.1);
        backdrop-filter: blur(1.5rem);
    }
}
/* Mobile view */
@media (max-width: 39.9999rem) {
    .primary-navigation a {
        cursor: pointer;
        transition: all 200ms ease-in-out;
    }

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

    .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: 40rem) and (max-width: 64.9999rem) {
    .primary-navigation {
        gap: 2rem clamp(1.2rem, 2.5vw, 1.95rem);
        padding-inline: 1rem;
    }
}

@media (min-width: 45em) {
    .logo {
        top: 4rem;
    }

    .primary-navigation {
        padding-inline: clamp(3rem, 5vw, 7rem);
    }
}

@media (min-width: 40em) and (max-width: 45em) {    
    .primary-navigation a > span {
        display: none;
    }
}

@media (min-width: 45rem) {
    .primary-navigation {
        margin-block: 1.5rem;
    }
}

.underline-indicators > * {
    cursor: pointer;
    padding: var(--underline-gap, 1rem) 0;
    border: 0;
    border-bottom: .2rem solid transparent;
}

.primary-navigation a:hover,
.primary-navigation a:focus-visible,
.tab-list button:hover,
.tab-list button:focus-visible {
    border-bottom-color: hsl( var(--clr-white) / .5);
}

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

@media (max-width: 39.9999rem) {
    .mobile-nav-toggle {
        display: block;
    }
}

.dot-indicators > * {
    cursor: pointer;
    border: 0;
    border-radius: 50%;
    aspect-ratio: 1;
    padding: .5em;
    background-color: hsl( var(--clr-white) / .25);
}

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

.dot-indicators > *:hover:not([aria-selected="true"]),
.dot-indicators > *:focus-visible:not([aria-selected="true"]) {
    background-color: hsl( var(--clr-white) / .5);
}

.number-indicators > * {
    cursor: pointer;
    border: 0;
    border-radius: 100%;
    width: 3rem;
    height: 3rem;
    aspect-ratio: 1;   
    color: hsl(var(--clr-white));
    background-color: transparent;
    border: 1px solid hsl(var(--clr-white) / .25);
}

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

.number-indicators > [aria-selected="true"] {
    background-color: hsl(var(--clr-white) / .25); /* semi-white, not full */
    border: 1px solid hsl(var(--clr-white));
}

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

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

/* home */

.home {
    background-image: url(./assets/home/background-home-mobile1.jpg);
}

@media (min-width: 35rem) {
    .home {
        background-position: center center;
        background-image: url(./assets/home/background-home-tablet1.jpg);
    }

}

@media (min-width: 45rem) {
    .home {
        background-image: url(./assets/home/background-home-desktop1.jpg);
    }

}

/*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;
    justify-self: center;
}

/* destination layout*/

.grid-container--destination {
    --flow-space: 2rem;
    padding-top: 7rem;
    grid-template-areas:
        'title'
        'image'
        'tabs'
        'content';
}

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

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

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

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

    .destination-meta {
        flex-direction: row;
        justify-content: space-evenly;
        --gap: min(6vw, 6rem);
    }
}

@media (min-width: 45rem) {
    .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-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;
    }
}

.destination-meta {
    display: flex;
    flex-direction: row; /* horizontal layout */
    justify-content: space-evenly;
    gap: 4rem; /* spacing between distance and time */
    border-top: 1px solid hsl(var(--clr-white) / .1);
    margin-top: 2.5rem;
    padding-top: 2.5rem;
}


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

.tab-list button {
    appearance: none;
    -webkit-appearance: none;
    background-color: transparent;
    cursor: pointer;
}

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

/* destination background*/

.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 layout */  

.grid-container--crew {
    --flow-space: 2rem;
    padding-top: 6rem;
    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) / .1);
}

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

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

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

@media (min-width: 35rem) and (max-width: 44.9999rem) {
    .grid-container--crew {
        min-height: 100vh;
        align-content: space-between;
        grid-template-areas:
            'title'
            'content'
            'dots'
            'image';
    }

    .grid-container--crew > picture {
        align-self: end;
    }
}

@media (min-width: 45rem) {
    .grid-container--crew {
        grid-template-columns: minmax(1rem, 1fr) minmax(0, 33rem) minmax(0, 33rem) minmax(1rem, 1fr);
        justify-items: start;
        align-content: end;
        padding-bottom: 0;
        grid-template-areas:
            '. title title .'
            '. content image .'
            '. dots image .';
    }

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

/* crew background*/

.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 layout*/

.grid-container--technology {
    --flow-space: 2rem;
    padding-inline: 0;
    padding-top: 6rem;
    grid-template-areas:
        'title'
        'image'
        'tech'
        'content';
}

.grid-container--technology > picture {
    grid-area: image;
    max-width: 100%;
}

.grid-container--technology > .number-indicators {
    grid-area: tech;
}

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

.number-indicators > * {
    color: hsl( var(--clr-white) );
    background-color: transparent;
    border: 1px solid hsl( var(--clr-white) / .25);
}

@media (min-width: 45rem) {
    .grid-container--technology {
        justify-items: start;
        grid-template-columns: minmax(2rem, 1fr) minmax(0, 5rem) minmax(0, 35rem) minmax(0, 25rem) minmax(2rem, 1fr);
        grid-template-areas:
            '. title title title .'
            '. tech content image image'
            '. tech content image image';
    }

    .grid-container--technology > .numbered-title {
        margin-inline: 0 !important;
    }

    .number-indicators {
        flex-direction: column;
    }

    .grid-container--technology > .technology-info {
        padding-inline: 0;
    }

    .grid-container--technology > picture {
        grid-column: 4 / 6;
        justify-self: end;
        max-width: none;
        width: 100%;
    }
}

/* technology background*/

.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);
    }
}