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

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

    /* font-sizes */

    --fs-800: 1.75rem;
    --fs-700: 1.625rem;
    --fs-600: 1.5rem;
    --fs-500: 1.75rem;
    --fs-400: 1.25rem;
    --fs-300: 1.125rem;
    --fs-200: 0.875rem;

    /*  font-families */

    --ff-header: "Montserrat";
    --ff-body: "Nunito";
}

/* ------------------- */
/* 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,
picutre {
    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);
}

.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);
  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-out;
}

.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-header { font-family: var(--ff-header); } 
.ff-body { font-family: var(--ff-body); } 

.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-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;
}

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

.title{
    margin-top: 1.725rem;
    width: 10%;
}

.undertitle{
    margin-left: 1.5rem;
    margin-top: 2.06rem;
    width: 80%;
}

nav{
    width:85%;
}

.primary-header{
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    margin-left: 1.5rem;
    --gap: 0rem;
}

.primary-navigation {
    --gap: clamp(0.25rem, 0.5rem, 2rem);
    --underline-gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
    background: hsl( var(--clr-dark) / .95);
    justify-content: space-around;
    width: 100%;
}

@supports (backdrop-filter: blur(1.5rem)){
    .primary-navigation{
        background: hsl( var(--clr-white) / .04);
        backdrop-filter: blur(8px);
    }
}

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

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

    .primary-navigation.underline-indicators > .active{
        border: 0;
    }

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

    .primary-navigation--not-home{
        background: hsl( var(--clr-dark) / .75);
    }

    .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: 35em){
    .primary-navigation{
        padding-inline: clamp(0.25rem, 0.5rem, 2rem);
        padding-block: 1rem;
    }

    .title{
        margin-top: 0;
    }

    .undertitle{
        margin-top: 0.5rem;
    }
}

@media (min-width: 50em){

    .title{
        display: none;
    }

    .primary-header::before{
        content: 'Soft Condensed Matter Laboratory';
        font-size: var(--fs-700);
        font-family: var(--ff-header);
        width: 40%;
    }

    nav{
        width: 60%;
    }

    .primary-navigation{
        --gap: clamp(0.75rem, 1rem, 3.5rem);
    }
}

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


.underline-indicators > * {
    cursor: pointer;
    padding: var(--underline-gap, 0.5rem) 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); 
}


/* Publication header -- years toggle */

.pub-year-toggle{
    display: none;
}


.years-list{
    display: flex;
    flex-wrap: wrap;
    justify-content: left;
    position: absolute;
    z-index: 100;
    transform: translateX(-110%);
    transition: all 500ms ease-in-out;
    border: black solid 3px;
    padding-inline: 1rem;
    margin-block: 0.5rem;
    background: hsl( var(--clr-white) / 1);
    width: 95%;
}

@supports (backdrop-filter: blur(1.5rem)){
    .years-list{
        background: hsl( var(--clr-white) / .5);
        backdrop-filter: blur(16px);
    }
}

.years-list > *{
    flex: 0 0 5rem;
    padding-inline: 0.5rem;
}

.year-link a{
    text-decoration: none;
    cursor: pointer;
    color:hsl( var(--clr-dark) );
}

.year-link a:focus,
.year-link a:hover{
    border-bottom: hsl( var(--clr-dark) ) 2px solid;
}


@media (max-width: 50em){
    .pub-year-toggle{
        display: inline-block;
        position: relative;
        top: -0.45rem;
        z-index: 1500;
        background: transparent;
        background-image: url(./assets/shared/toggle.svg);
        background-repeat: no-repeat;
        background-position: center;
        width: 1rem;
        aspect-ratio: 1;
        border: 0;
        transform: rotate(-180deg);
        /* margin: 0.25rem; */
        transition: transform 500ms ease-in-out;
    }

    .pub-year-toggle[aria-expanded="true"]{
        transform: rotate(0deg);
    }

    .pub-year-toggle:focus-visible {    
        outline: 5px solid black;
        outline-offset: 5px;
    }

    .years-list[data-visible="true"]{
        transform: translateX(0%);
        
    }
}

@media (min-width: 50em){
    .years-list{
        position: relative;
        transform: none;
        border: none;
        justify-content: left;
        margin-top: 2rem;
        padding-right: 0;
        margin-right: 0;
    }

    #publications-header h1{
        display: none;
    }
}

/* Back to top button*/

.back-to-top{
    position: fixed;
    right: 1rem;
    bottom: 2rem;
    background: white;
    background-image: url(./assets/shared/back-to-the-top-icon.svg);
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    width: 2.5rem;
    aspect-ratio: 1;
    border: 1px solid hsl( var(--clr-dark) );
}

/* ------------------------------ */
/* Page specific backgrounds      */
/* ------------------------------ */

body{
    background-size: cover;
}

.header-not-home{
    background-position: 75% top;
    background-image: url(./assets/bckg/Bckg_mobile_crop.png);
}

@media (min-width: 35em){
    .header-not-home{
        background-position: 45% top;
        background-image: url(./assets/bckg/Bckg_tablet_crop.png);
    }
}

@media (min-width: 50em){
    .header-not-home{
        background-position: right top;
        background-image: url(./assets/bckg/Bckg_desktop_crop.png);
    }
}

/* home */

.home{
    background-position: 75% top;
    background-image: url(./assets/bckg/Bckg_mobile.png);
}

@media (min-width: 35em){
    .home{
        background-position: 45% top;
        background-image: url(./assets/bckg/Bckg_tablet.png);
    }
}

@media (min-width: 50em){
    .home{
        background-position: right top;
        background-image: url(./assets/bckg/Bckg_desktop.png);
    }
}

/* people */

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

/* alumni */

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

/* publications */

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

/* location */

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

/* research */

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


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

.grid-container{
    text-align: center;
    display: grid;
    place-items: center;
    padding-inline: 1rem;
    padding-bottom: 4rem;   
}


/* home */


.grid-container--home{
    grid-template-columns: minmax(1rem,1fr) 70% 30%;
}

.grid-container--home > *:first-child {
    grid-column: 2;
    margin-top: clamp(1rem,3rem,5rem);
    text-align: left;
    flex-direction: column;
}


@media (min-width:35em){
    .grid-container--home{
        grid-template-columns: 2rem 55% 45%;
    }
}

@media (min-width:50em) {
    .grid-container--home{
        padding-top: 1rem;
        grid-template-columns: 5rem 45% 55%;
    }
}

.extra-link{
    flex-direction: column;
    --gap: 0.5rem;
}

.extra-link a{
    text-decoration: none;
}

.extra-link a:hover,
.extra-link a:focus{
    color: hsl( var(--clr-white) );
}

@media (min-width: 50em){
    .extra-link{
        flex-direction: row;
        --gap: 2rem;
    }
}


/* people */

.people main{
    margin-inline: 2rem;
    /* width: 85vw; */
    padding-bottom: 4rem;
}

.people-header{
    border-bottom: 1px solid hsl( var(--clr-light) );
    margin-top: 2rem;
    padding-bottom: 2rem;
}

.people-header h1{
    display: inline-block;
    width: fit-content;
    margin-right: 2rem;
    padding-top: 1rem;
}

.people-header a{
    display: inline-block;
    margin-right: 2rem;
    color: hsl( var(--clr-dark) / .25);
    text-decoration: none;
    padding-top: 1rem;
}

.people-header a:hover,
.people-header a:focus{
    color: hsl( var(--clr-dark) / .75);
    border-bottom: 1px solid hsl( var(--clr-dark) / .75);
}


.flex--people{
    flex-direction: column;
    margin-block: 2rem;
    margin-inline: 0rem;
    width: 85vw;
}

.people-image{
    aspect-ratio: 1;
    width: 50vw;
}

.people-element{
    flex-direction: column;
    align-items: start;
    justify-content: start;
    margin-top: 2rem;
    width: 90vw;
}

.people-name{
    font-weight: 900;
}

.people-meta{
    max-width: 80%;
}

@media (min-width: 35em){
    .people-element{
        flex-direction: row;
        align-items: flex-start; 
    }

    .people-image{
        aspect-ratio: 1;
        max-width: 35%;
    }

    .people-meta{
        max-width: 50%;
    }

}

@media (min-width: 50em) {
    .flex--people{
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: space-between;
        --gap: 0.75rem;
    }

    .flex--people > div{
        flex: 0 0 45%;
    }

    .people-image{
        min-width: 45%;
        aspect-ratio: 1;
        width: 50%;
    }
    
   
}

/* alumni */

.alumni main{
    margin-inline: 2rem;
    padding-bottom: 4rem;
}

.alumni-header-main{
    flex-wrap: wrap;
    justify-content: left;
    margin-top: 1rem;
}

.alumni-link a{
    text-decoration: none;
    cursor: pointer;
    color:hsl( var(--clr-dark)  );
}

.alumni-link a:hover,
.alumni-link a:focus{
    border-bottom: 1px solid hsl( var(--clr-dark) );
}

#alumni-header{
    display: none;
}

#alumni-list{
    margin-top: 2rem
}

.alumni-list{
    grid-template-columns: 90%;
    gap: 2.5rem;
    padding-inline: 1rem;
    margin-block: 2rem;
}

.alumni-list-row{
    grid-template-areas: 
    "Name"
    "Position"
    "currentInstitution"
    "currentPosition"
    "email";
}

.alumni-subtitle{
    font-style: italic;
    text-decoration: underline;
}


@media (min-width: 35em){
    .alumni-list{
        grid-template-columns: 45% 45%;
        
    }
}

@media (min-width: 50em){
    .alumni-list{
        grid-template-columns: 100%;
        width: 100%;
    }
    
    .alumni-list-row{
        grid-template-columns: 18% 18% 18% 18% 20%;
        grid-template-areas: "Name Position currentInstitution currentPosition email";
        width: 95%;
        border-bottom: 1px solid hsl( var(--clr-dark) / .25);
        padding-bottom: 0.5rem;
    
    }

    #alumni-header{
        display: grid;
    }

    .alumni-subtitle{
        display: none;
    }
}

/* publications */

.publications{
    margin: 0 auto;
}

.publications main{
    margin: 1rem;
    width: 95%;
}

#publications-header h1{
    display: inline-block;
    padding-top: 1rem;
    margin-left: 1rem;
}

.publications-list{
    margin-left: 1.5rem;
    padding-bottom: 2.5rem;
}

.publications-year{
    margin-top: 1rem;
}

.publications-year div:last-of-type{
    border: none;
}

.publications-element{
    margin-inline: 0.5rem;
    margin-top: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: hsl( var(--clr-light) ) 1px solid;
}


.publications-extra-hover .image-extra{
    display: none;
}


.publications-extra-hover:hover .image-extra{
    display: block;
    position: relative;
    width: 50%;
    max-width: 250px;
    border: black 3px solid;
    padding: 0.5rem;
    margin: 0.5rem auto;
}

.publications-extra-hover:hover .image-extra img{
    margin: 0 auto;
}

/* lab location */

.location h1{
    margin: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid hsl( var(--clr-light) );
}



.location-addresses{
    grid-area: address;
    text-align: left;
    padding-top: 1rem;
    margin-left: 1rem;
}

.location-addresses > *{
    padding-block: 1rem;
}

.location-addresses p:first-child{
    border-bottom: 1px solid hsl( var(--clr-light) );
}

.location-map{
    grid-area: map;
    place-items: center;
    width: 80%;
 }

.lab-map{
    width: 100%;
    aspect-ratio: 1;
    border: 2px solid hsl( var(--clr-dark) );
}



.grid-container--location{
     grid-template-areas: 
    "map"
    "address";
}


@media (min-width: 50em){
    .grid-container--location{
        grid-template-columns: minmax(1rem,1fr) 30% minmax(1rem,1fr) 50% minmax(1rem,1fr);
        grid-template-areas: ". address . map .";
    }

    .location-addresses{
        align-self: start;
    }
}


/* research page */

.research-main{
    padding: 2rem;
}

.research-title{
    margin-bottom: 2rem;
    padding: 0.5rem;
    border-bottom: 1px solid black;
}

.research-caroussel{
    width: 100%;
}

.research-caroussel-element{
    text-decoration: none;
    border: 3px solid black;
    aspect-ratio: 1 / 1;
    width: 75%;
    border-radius: 10%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    background-repeat: no-repeat;
    background-size: cover;
}

.research-caroussel-element>p{
    text-align: center;
    font-weight: bold;
}

.research-caroussel-element:hover{
    cursor: pointer;
    opacity: 90%;
}

.flex-research{
    flex-flow: column wrap;
    justify-content: space-around;
    align-items: start;
    --gap: 1rem;
}

.research-nematicConfined{
    background-image: url('./assets/research/Torus_snippet.PNG');
}

.research-microgels{
    background-image: url('./assets/research/Microgels_snippet.PNG');
}

.research-extremeThermo{
    background-image: url('./assets/research/ExThermo_snippet_b.PNG');
}

.research-alginate{
    background-image: url('./assets/research/Alginate_snippet.PNG');
}

.research-chitosan{
    background-image: url('./assets/research/Chitosan_snippet.PNG');
}

.research-activeNematic{
    background-image: url('./assets/research/AN_snippet_2.PNG');
}

.research-fireAnts{
    background-image: url('./assets/research/FireAnts_snippet.PNG');
}

.research-granular{
    background-image: url('./assets/research/Granular_snippet.PNG');
}

@media (min-width: 35em){
    .flex-research{
        flex-flow: row wrap;
    }

    .research-caroussel-element{
        width: 40vw;
    }
}

@media (min-width: 50em){
    .research-caroussel-element{
        width: 25vw;
    }
}

.research-project{
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.research-subprojectSelect{
    margin-top: 1rem;
    margin-left: 0.5rem;
}

.research-subprojectSelect>a{
    text-decoration: none;
    margin-inline: 0.25rem;
    opacity: 0.75;
}

.research-subprojectSelect>a:hover{
    opacity: 1;
}

.research-projectTitle{
    padding-block: 1rem;
    border-bottom: 1px solid black;
}

.research-projectContributors{
    margin-top: 1rem;
    margin-left: 1rem;
    font-style: italic;
}

.research-projectBody{
    margin-block: 1rem;
    text-align: justify;
    text-justify: inter-word;
}

.research-projectImageBlock{
    display: flex;
    flex-direction: column;
    margin-block: 1rem;
    width: 100%;
}

.research-projectImage{
    width: 1fr;
    align-self: center;
}

.research-projectImageCaption{
    margin-inline: 2rem;
    margin-top: 0.75rem;
    align-self: center;
    text-align: justify;
    font-style: italic;
}

.research-video{
    width: 100% !important;
    height: auto !important;
    padding-inline: 20%
}