@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:wght@400;700&family=Source+Sans+3:ital,wght@0,300;0,400;0,600;1,400&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,200..1000;1,200..1000&display=swap');

:root {
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;

  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
  
  --clr-primary: #CA2A25;
  --clr-secondary: #FF8755;
  --clr-dark-green: #3FB28D;
  --clr-light-green: #92E38C;
  --clr-neutral-dark: #292A2D;
  --clr-neutral-white: #FFFFFF;
  --clr-neutral-black: #000000;
  --clr-neutral-grey: #F6F6F9;
  --clr-neutral-sgrey: #EDEDFF;

  --clr-primary-background: #F6F6F9;
  --clr-secondary-background: #ebebf1;

  --clr-font: #292A2D;

  --ff-primary: "Libre Baskerville", serif;
  --ff-secondary: "Source Sans 3", sans-serif;
  --ff-logo: "Nunito", sans-serif;

  --ff-heading: var(--ff-primary);
  --ff-content: var(--ff-secondary);

  --fw-semi-light: 300; 
  --fw-regular: 400; 
  --fw-semi-bold: 600; 
  --fw-bold: 700;
  --fw-extra-bold: 800; 

  --fs-300: .81251rem;
  --fs-400: .875rem;
  --fs-500: .9375rem;
  --fs-600: 1.2rem;
  --fs-700: 1.5rem;
  --fs-800: 2.5rem;
  --fs-900: 3.5rem;

  --fs-body: var(--fs-400);
  --fs-nav: var(--fs-600);
  --fs-button: var(--fs-300);

  --size-100: 1px;
  --size-200: 2px;
  --size-300: 0.5rem;
  --size-400: .81251rem;
  --size-500: .9375rem;
  --size-600: 1.2rem;
  --size-700: 1.5rem;
  --size-800: 2.5rem;
  --size-900: 3.5rem;

  --shadow: #781410 0.15rem 0.15rem 0.5rem, #781410 0px 0.075rem 0.175rem;
  --background-image-url-noise: url("../images/noise-light-theme.svg");

  color: var(--clr-font);
  background-color: var(--clr-primary-background);

}

[data-theme="dark"] {
  --clr-primary: #06629B;
  --clr-secondary: #00A58B;
  --clr-primary-background: #141723;
  --clr-secondary-background: #101118;
  --clr-font: #DCDCDC;
  --shadow: #0f1430 0.15rem 0.15rem 0.5rem, #0f1430 0px 0.075rem 0.175rem;
  --background-image-url-noise: url("../images/noise-dark-theme.svg");
}

* {
  margin: 0;
  padding: 0;
  font: inherit;
}

ul[role="list"],
ol[role="list"] {
  list-style: none;
}

html, body {
  height: 100%;
  scroll-behavior: smooth;
}

html:focus {
  scroll-behavior: smooth;
}

body {
  text-rendering: optimizeSpeed;
  line-height: 2;
}

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



/* UTILITY CLASSES ------------------------------------------------*/

.visually-hidden { 
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap; 
  border: 0;
}

.text-primary { color: var(--clr-neutral-dark); }
.text-accent { color: var(--clr-secondary); }

.bg-primary { background-color: var(--clr-primary-background); }
.bg-secondary { background-color: var(--clr-secondary-background); }

.fw-semi-light { font-weight: var(--fw-semi-light); }
.fw-regular { font-weight: var(--fw-regular); }
.fw-semi-bold { font-weight: var(--fw-semi-bold); }
.fw-bold { font-weight: var(--fw-bold); }

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

.text-shadow { text-shadow: var(--shadow); }

.padding-block-l { padding-block: var(--size-800); }

.dither {
  background-image: var(--background-image-url-noise);
}




/* GENERAL STYLING ------------------------------------------------*/

body {
  font-size: var(--fs-body);
  font-family: var(--ff-secondary);
  color: var(--clr-font);
}

/* Typography */
a {
  color: var(--clr-secondary);
  text-decoration: none;
  transition: all .3s ease-in-out;
}
  a:is(:hover, :focus) {
    color: var(--clr-primary);
  }

h1 {
  font-family: var(--ff-heading);
  color: var(--clr-primary);
  font-size: var(--fs-900);
  font-weight: var(--fw-bold);
}

h1, h3 {
  background: linear-gradient(
    to top in oklch,
    var(--clr-primary),
    var(--clr-secondary));
  background-clip: text;
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  line-height: normal;
  animation: textMovingBackground 2.5s ease-in-out infinite alternate;
}

h2 {
  font-family: var(--ff-heading);
  font-size: var(--fs-600);
  font-weight: var(--fw-bold);
  color: var(--clr-font);
  padding-bottom: var(--size-600);
}

.h2-hero-bottom{
  padding-top: var(--size-600);
}

h3 {
  font-family: var(--ff-heading);
  font-size: var(--fs-800);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  text-align: center;
  margin-bottom: var(--size-800);
}

h4 {
  font-family: var(--ff-heading);
  font-size: var(--fs-600);
  font-weight: var(--fw-bold);
  color: var(--clr-font);
  padding-bottom: var(--size-600);
}

p {
  font-size: var(--fs-600);
}

blockquote, cite { 
  font-family: var(--ff-content);
  font-size: var(--fs-500);
}

cite {
  font-weight: var(--fw-regular);
  font-style: italic;
  font-size: var(--fs-500);
}

b {
  font-weight: var(--fw-bold);
}

strong {
  font-weight: bold;
}



/* Layout */
.container { 
  --max-width: 1110px;
  --padding: 1rem;
  width: min(var(--max-width), 100% - (var(--padding)) * 2);
  margin-inline: auto;
}

section {
  scroll-margin-top: 70px; /* navigation bar height */
}

.even-columns {
  display: grid;
  gap: 1rem;
}

.publications {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--size-800);
}

.quotes {
  display: inline-block;
  fill: var(--clr-primary);
}

hr {
  width: 30%;
  margin-block: var(--size-300);
}

.actions-hr {
  margin-block: var(--size-800) var(--size-600);
}

.h1-logo-navbar, .h1-logo-footer {
  font-family: var(--ff-logo);
  font-size: var(--size-800);
  font-weight: var(--fw-extra-bold);
  white-space: nowrap;
}





/* SPECIFIC STYLING -----------------------------------------------*/


/* Navigation */
.primary-header {
  background-image: var(--background-image-url-noise), linear-gradient(225deg, var(--clr-primary-background) 0%, var(--clr-secondary-background) 100%);
  padding-block: var(--size-300);
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 1030;
}

.nav-wrapper {
  font-family: var(--ff-content);
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 30px;
}

.mobile-nav-toggle {
  display: none;
  border: 3px solid var(--clr-primary);
  border-radius: var(--size-300);
}

.nav-list {
  font-family: var(--ff-content);
  font-size: var(--fs-nav);
  font-weight: var(--fw-bold);
  display: flex;
  gap: clamp(var(--size-400), 5vw, var(--size-700));
  text-transform: uppercase;
}

.footer-nav {
  text-transform: uppercase;
  font-size: var(--fs-nav);
  font-weight: var(--fw-bold);
}

.nav-list li {
  margin-block: auto;
}

.nav-list button {
  background-color: transparent;
  border: none;
  outline: none;
  max-width: var(--size-700);
  max-height: var(--size-700);
  cursor: pointer;
  vertical-align: sub;
} 



/* Hero Section */
#hero-section {
  width: 100%;
  padding-top: 70px; /* Navbar height */
}

.hero-container {
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding-top: var(--size-600);
  min-height: calc(100dvh - (70px + 75px)); /*100 dvh - (navbar total height + padding)*/
}

.elena-callegari-image {
  flex-basis: 25%;
  padding-left: var(--size-500);
}

.elena-callegari-bio {
  flex-basis: 75%;
}

.hero-image {
  max-width: 25rem;
  max-height: 25rem;
  border-radius: 50%;
  opacity: 0;
  outline: 0 solid var(--clr-primary);
}

.hero-image.visible {
  opacity: 1;
  animation: slideIn 1s linear forwards,
             boxShadowGrow 1.2s cubic-bezier(0.4, 0, 0.2, 1) forwards,
             boxShadowPulse 6s cubic-bezier(0.4, 0, 0.2, 1) 1.2s infinite;
}

/* Begin: needed for JS */
.typewriter, .bio {
  display: none;         /* Removes element from layout */
  opacity: 0;            /* Fully transparent */
  transition: opacity 0.4s ease;
}

/* When animation starts */
.visible {
  display: block;        /* Adds element back to layout */
  opacity: 1;            /* Fades in */
}

.cursor {
  display: inline-block;
  width: 1px;
  height: 2em;
  background-color: currentColor;
  animation: blink 1s step-end infinite;
  vertical-align: middle;
  margin-left: 1px;
}

/* Word-by-word animation inside bio */
.word {
  opacity: 0;
  display: inline-block; /* Needed for transition to work */
  transition: opacity 0.4s ease;
}

.word.visible {
  opacity: 1;
}
/* End: needed for JS */

.sagewrite {
  color: var(--clr-dark-green) !important;
  font-weight: var(--fw-bold);
  font-size: var(--size-700);
  animation: pulse 4s infinite;
  display: inline-block;
}


.sagewrite:hover {
  color: var(--clr-light-green) !important;
}



/* Publications Section */
.document-data {
  padding-top: var(--size-300);
}

.document-data p {
  display: inline-block;
  font-size: var(--fs-400);
}

.document-data a {
  font-weight: var(--fw-bold);
}

.tag {
  display: inline-block;
  line-height: var(--size-400);
  font-weight: var(--fw-bold);
  padding: 5px 8px 3px 8px;
  position: relative;
  margin-right: var(--size-300);
  text-decoration: none;
  transition: all .3s ease-in-out;
  border-radius: 3px;
}

.tag {
  background-color: var(--clr-primary);
  color: var(--clr-neutral-white);
}
  .tag:hover {
    background-color: var(--clr-secondary);
    color: var(--clr-neutral-white);
  }


.doc-download{
  padding-top: var(--size-200);
}



/* Contact Section */
#contact .container {
 text-align: center;
}

.a-mail{
  margin-block: var(--size-500) 0;
  font-size: var(--size-700);
  animation: pulse 4s infinite;
  display:inline-block;
}



/* Footer */
footer .even-columns {
  place-content: center;
}

.h1-logo-footer {
  padding-bottom: var(--size-700);
  place-self: end;
}

.social-list {
  display: flex;
  gap: var(--size-400);
  place-self: end;
}

.social-list i {
  font-size: var(--size-700);
}



/*   SCROLLBARS   -------------------------------------------------*/
::-webkit-scrollbar {
  width: 0.8rem;
}

::-webkit-scrollbar-track {
  background: var(--clr-primary-background);
  border-radius: 100vw;
  margin-block: 0.5em;
}

::-webkit-scrollbar-thumb {
  background: var(--clr-primary);
  border: 3px solid var(--clr-primary-background);
  border-radius: 100vw;
}

::-webkit-scrollbar-thumb:hover {
  background-image: -webkit-linear-gradient(bottom, var(--clr-primary), var(--clr-secondary));
  background-image: -moz-linear-gradient(bottom, var(--clr-primary), var(--clr-secondary));
  background-image: -ms-linear-gradient(bottom, var(--clr-primary), var(--clr-secondary));
  background-image: -o-linear-gradient(bottom, var(--clr-primary), var(--clr-secondary));
  background-image: linear-gradient(to bottom, var(--clr-primary), var(--clr-secondary));
}

@supports (scrollbar-color: var(--clr-secondary) transparent) {
  * {
      scrollbar-color: var(--clr-secondary) transparent;
  }
}





/* JAVASCRIPT RELATED CSS -----------------------------------------*/
.card-hidden {
  display: none;
}

.card-shown {
  display: block;
}

#action-container {
  display: flex;
  flex-direction: column;
  place-content: center;
  place-items: center;
}

#number-of-items {
  flex: 1;
}

#number-of-items p {
  display: block;
}

#number-of-items strong {
  color: var(--clr-secondary);
  font-size: 120%;
}

#message {
  padding-block: var(--size-100) var(--size-100);
  flex: 1;
}

#message p {
  font-weight: var(--fw-bold);
  font-size: var(--fs-500);
}

#actions {
  display: flex;
  gap: var(--size-300);
  place-content: center;
  flex: 1;
  flex-wrap: wrap;
}

#actions a {
  font-size: var(--fs-600);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  padding: var(--size-300) var(--size-400);
  white-space: nowrap;
}

.red-message {
  color: #CA2A25;
}

.shake {
  -webkit-animation-name: shake;
  -webkit-animation-duration: 0.5s;
  -webkit-transform-origin:50% 50%;
  -webkit-animation-iteration-count: infinite;
}



/* KEYFRAMES ------------------------------------------------------*/
/* Text background aimation */
@keyframes textMovingBackground {
    0% { background-position: 50% 0%; }
  100% { background-position: 50% 100%; }
}

/* Outline hero image */
@keyframes boxShadowGrow {
    0% { box-shadow: 0 0 0 0 var(--clr-primary); }
  100% { box-shadow: 0 0 0 var(--size-300) var(--clr-primary); }
}

@keyframes boxShadowPulse {
    0% { box-shadow: 0 0 0 var(--size-300) var(--clr-primary); }
   50% { box-shadow: 0 0 0 var(--size-500) var(--clr-secondary); }
  100% { box-shadow: 0 0 0 var(--size-300) var(--clr-primary); }
}

/* Color changing hero image outline */
@keyframes outlineColorLoop {
    0% { outline-color: var(--clr-primary); }
   50% { outline-color: var(--clr-secondary); }
  100% { outline-color: var(--clr-primary); }
}

/* Hero Image SlideIn */
@keyframes slideIn {
  0% {
    animation-timing-function: cubic-bezier(0.8, 0.2, 0.8, 0.8);
    transform: translate(-40%, 0%);
    opacity: 0;
  }
  30% {
    animation-timing-function: cubic-bezier(0.2, 0.3, 0.3, 0.9);
    transform: translate(-2.5%, 0%);
    opacity: 1;
  }
  50% {
    animation-timing-function: cubic-bezier(0.6, 0.2, 0.7, 0.7);
    transform: translate(-10%, 0%);
    opacity: 1;
  }
  70% {
    animation-timing-function: cubic-bezier(0.2, 0.5, 0.5, 1);
    transform: translate(-1.0%, 0%);
    opacity: 1;
  }
  85% {
    animation-timing-function: cubic-bezier(0.5, 0.2, 0.8, 0.6);
    transform: translate(-4%, 0%);
    opacity: 1;
  }
  100% {
    transform: translate(0%, 0%);
    opacity: 1;
  }
}

/* Hero Image FallIn */
@keyframes fallIn
{
  0% {
    animation-timing-function: cubic-bezier(0.8,0.2,0.8,0.8);
    transform: translate(0%,-50%);
    opacity: 0;
  }
  30% {
    animation-timing-function: cubic-bezier(0.2,0.3,0.3,0.9);
    transform: translate(0%,-2.5%);
    opacity: 1;
  }
  50% {
    animation-timing-function: cubic-bezier(0.6,0.2,0.7,0.7);
    transform: translate(0%,-20%);
    opacity: 1;
  }
  70% {
    animation-timing-function: cubic-bezier(0.2,0.5,0.5,1);
    transform: translate(0%,-1.0%);
    opacity: 1;
  }
  85% {
    animation-timing-function: cubic-bezier(0.5,0.2,0.8,0.6);
    transform: translate(0%,-8%);
    opacity: 1;
  }
  100% {
    transform: translate(0%,0%);
    opacity: 1;
  }
}

/* Typography blink */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Pulsating animation */
@keyframes pulse {
      0% { transform: scale(0.8); }
     70% { transform: scale(1.0); }
    100% { transform: scale(0.8); }
}

/* Shake animation */
@keyframes shake {
    0% { -webkit-transform: translate(2px, 1px) rotate(0deg); } 
   10% { -webkit-transform: translate(-1px, -2px) rotate(-1deg); }
   20% { -webkit-transform: translate(-3px, 0px) rotate(1deg); }
   30% { -webkit-transform: translate(0px, 2px) rotate(0deg); }
   40% { -webkit-transform: translate(1px, -1px) rotate(1deg); }
   50% { -webkit-transform: translate(-1px, 2px) rotate(-1deg); }
   60% { -webkit-transform: translate(-3px, 1px) rotate(0deg); }
   70% { -webkit-transform: translate(2px, 1px) rotate(-1deg); }
   80% { -webkit-transform: translate(-1px, -1px) rotate(1deg); }
   90% { -webkit-transform: translate(2px, 2px) rotate(0deg); }
  100% { -webkit-transform: translate(1px, -2px) rotate(-1deg); }
}

/* Bounce animation - currently not in use */
/* @keyframes bounce {
    0% { transform: translateY( 0px); }
   30% { transform: translateY( -5px); }
  100% { transform: translateY( 0 px); }
} */ 



/* MEDIA QUERIES --------------------------------------------------*/
/* Remove all animation and smooth behaviour */
@media (prefers-reduced-motion: reduce) {
  html:focus-within {
    scroll-behavior: auto;
  }

  *, *:before, *:after{
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (max-width: 50em) {
  .primary-navigation {
    display: none;
    position: absolute;
    padding-block: var(--size-600);
    right: 1rem;
    top: 4.5rem;
    background-color: var(--clr-primary-background);
    min-height: 200px;
    border: 3px solid var(--clr-primary);
    border-radius: var(--size-300);
    width: 12rem;
  }

  .nav-list {
    display: grid;
    gap: var(--size-300);
    text-align: center;
  }

  .primary-navigation[data-visible] {
    display: grid;
  }
  
  .mobile-nav-toggle {
    display: block;
    cursor: pointer;
    background-color: var(--clr-secondary);
    min-width: var(--size-800);
    width: var(--size-800);
    aspect-ratio: 1;
    background-image: url("../images/icon-hamburger.svg");
    background-size: 70%;
    background-repeat: no-repeat;
    background-position: center;
  }  

  .mobile-nav-toggle .icon-close {
    display: none;
  }
  
  .mobile-nav-toggle[aria-expanded="true"] {
    background-image: url("../images/icon-close.svg");
  }

  .icon-hamburger{
    display: block;
  }

  .dither-mediaquery {
    background-image: var(--background-image-url-noise);
  }
  
  .hero-image{
    max-width: 20rem;
    max-height: 20rem;
  }
  
  .hero-image.visible {
    opacity: 1;
    animation: fallIn 1s linear forwards,
               boxShadowGrow 1.2s cubic-bezier(0.4, 0, 0.2, 1) forwards,
               boxShadowPulse 6s cubic-bezier(0.4, 0, 0.2, 1) 1.2s infinite;
    z-index: 100;           
  }


  .elena-callegari-image {
    padding-left: 0;
  }

  .elena-callegari-bio {
    margin-top: 50px !important;
  }

}

@media (min-width: 50em) {
  .even-columns {
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
  }

  #hero-section {
    height: calc(100dvh - (120px));
    height: auto;
  }

  .hero-container { 
    text-align: left;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: var(--size-900);
    /* height: 100%; */
  }

  .publications {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--size-800);
  }

  .social-icons-container { 
    display: grid;
    place-self: start end;
  }

  .social-icons-container, .footer-nav-container { 
    padding-inline: var(--size-800);
  }
}