* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;

    font-family: "Montserrat", sans-serif;
    font-optical-sizing: auto;
}


:root {
    .dark {
    background-color: #b3b1b1;
    }
      --accent-orange: #ff7a00; 
      --accent-dark-on-accent: #0b0b0b;
      --hero-overlay-dark: linear-gradient(180deg, rgba(3,6,10,0.66), rgba(3,6,10,0.54));
      --hero-author-color: #ffffff;
      --hero-topic-color: var(--accent-orange);
      --hero-desc-color: rgba(255,255,255,0.95);
}

body {
    background-color: #f2f2f2;
    }

nav {
    width: 100vw;
    height: 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    margin-top: .7rem;
    color: white;
    animation: moveInTop 1.5s ease-out .5s;
        animation-fill-mode: backwards;
        position: absolute;
        z-index: 1000;
}

.toggle {
    display: none;
    cursor: pointer;
    width: 3.4rem;
}

.toggle .bar {
    flex-basis: 100%;
    height: .4rem;
    background-color: white;
    margin: .3rem;
}

nav ul {
    width: 55%;
    height: 100%;
    display: flex;
    border: 1px solid white;
    border-radius: 1rem;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: rgba(11, 20, 46, 0.4);
}

nav ul li {
    list-style: none;
}

nav ul li a {
    text-decoration: none;
    font-size: 1.2rem;
    color: white;
    font-weight: bold;
}

nav ul li a:hover {
    color: var(--accent-orange);
}

/* CSS */
nav ul li a.visited,
nav ul li a.active {            /* .active for current page highlight */
  color: var(--accent-orange);
  transition: color .18s;
}

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 33px;
}

/* Hide default HTML checkbox */
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

/* The slider */
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .4s;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 24px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}

input:checked + .slider {
  background-color: rgb(59, 58, 58);
}

input:focus + .slider {
  box-shadow: 0 0 1px gray;
}

input:checked + .slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}

/* Rounded sliders */
.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

/* slide show  */
.carousel {
  width: 100vw;
  height: 99vh;
  overflow: hidden;
  position: relative;
}

.item {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0 0 0 0;
}

.item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content {
  position: absolute;
  top: 8%;
  width: 114rem;
  max-width: 90%;
  left: 50%;
  transform: translateX(-50%);
  padding-right: 25%;
  color: var(--accent-orange);
  margin-top: 3rem;
}

.author {
  letter-spacing: .1rem;
  font-size: 2.5rem;
}

.title, .topic {
  font-weight: bold;
  font-size: 4.5rem;
  line-height: 5rem;
}


.desc {
  margin-top: 1.5rem;
  font-size: 2rem;
}

.buttons {
  display: grid;
  grid-template-columns: repeat(2, 130px);
  grid-template-rows: 3rem;
  gap: .5rem;
  margin-top: 1.5rem;
}

.buttons button {
  border: none;
  letter-spacing: .2rem;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 600;
}

.buttons button:nth-child(2) {
  background-color: transparent;
  color: white;
  border: 1px solid white;
}

/* thumbnails */
.thumbnail {
  position: absolute;
  bottom: 5rem;
  left: 50%;
  width: max-content;
  z-index: 100;
  display: flex;
  gap: 2rem;
  color: var(--accent-orange);
}

.t-item {
  width: 15rem;
  height: 22rem;
  flex-shrink: 0;
  position: relative;
}

.t-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 2rem;
}

.t-content {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
}

.t-title {
  font-weight: bolder;
}

/* arrows */
.arrows {
  position: absolute;
  top: 80%;
  right: 52%;
  width: 30rem;
  max-width: 30%;
  display: flex;
  gap: 1rem;
  align-items: center;
}

.arrows button {
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  background-color: #eee4;
  border: none;
  color: white;
  font-weight: bold;
  font-size: large;
  transition: 0.5s;
  z-index: 100;
}

.arrows button:hover {
  background-color: #eee;
  color: #555;
}

.item:nth-child(1) {
  z-index: 1;
}

.item:nth-child(1) .author,
.item:nth-child(1) .title,
.item:nth-child(1) .topic,
.item:nth-child(1) .desc,
.item:nth-child(1) .buttons {
  transform: translateY(5rem);
  filter: blur(2rem);
  opacity: 0;
  animation: showContent 0.5s 1s linear 1 forwards;
}

@keyframes showContent {
  to {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0);
  }
}

.item:nth-child(1) .title {
  animation-delay: 1.2s;
}

.item:nth-child(1) .topic {
  animation-delay: 1.4s;
}

.item:nth-child(1) .desc {
  animation-delay: 1.6s;
}

.item:nth-child(1) .buttons {
  animation-delay: 1.8s;
}

/*next click effect */
.next .item:nth-child(1) img {
  width: 15rem;
  height: 22rem;
  position: absolute;
  left: 50%;
  bottom: 5rem;
  border-radius: 2rem;
  animation: showImage .5s linear 1 forwards;
}

@keyframes showImage {
  to {
    width: 100%;
    height: 100%;
    left: 0;
    bottom: 0;
    border-radius: 0;
  }
}

.next .item:nth-last-child(1) {
  animation: hidePrevious 0.5s linear forwards;
}

@keyframes hidePrevious {
  to {
    opacity: 0;
    visibility: hidden;
  }
}

.next .thumbnail {
  transform: translateX(15rem);
  animation: transformThumbnails .5s linear forwards;
}


.biography {
    width: 100%;
    height: fit-content;
    display: flex;
    margin-top: 3rem;
}

.bio-img {
    width: 35%;
    height: 100%;
    border-radius: 2rem;
    margin-left: 2rem;
}

.bio-img img {
    width: 100%;
    height: 100%;
    border-radius: 2rem;
}

.bio-text {
    width: 65%;
    height: 100%;
    padding: 0 1rem;
}

.bio-text h1 {
    font-size: 4.5rem;
}

.bio-text h4, .c-text h4 {
    font-size: 1.9rem;
    margin-top: 1.5rem;
}

.bio-text p, .c-text p {
    font-size: 1.4rem;
    line-height: 1.7rem;
    font-weight: bold;
    color: rgb(19, 18, 18, 0.8);
}
.education {
    width: 100%;
    height: fit-content;
    margin-top: 2rem;
    color: rgb(19, 18, 18);
}

.education h1 {
    font-size: 3rem;
    margin-left: 4rem;
}

.ed-stack {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(auto-fit, 20rem);
    gap: 1.5rem;
    justify-content: center;
}

.e-div {
    width: 20rem;
    height: auto;
    min-height: auto;

    padding: 30px 10px 30px 10px;
    border-radius: 2rem;
}

.e-div:hover {
    box-shadow: 2px 2px 30px rgba(0,0,.2);
    transform: translateY(-.5rem);
}

.e-div img {
    width: 100%;
    height: 52%;
    border-radius: 1rem;
}

.e-div h3 {
    font-size: 2rem;
    margin-top: 1rem;
}

.e-div p {
    font-size: 1.6rem;
    color: rgb(19, 18, 18, 0.9);
}

.career {
    width: 100%;
    height: fit-content;
    padding: 2rem 0 0 1vw;
}

.career h3, .research h3 {
    font-size: 3rem;
    color: rgb(19, 18, 18);
}

.c-graph {
    display: flex;
    height: 90%;
}

.graph {
    width: 52%;
    height: 100%;
}

.graph img {
    width: 100%;
    height: 100%;
}

.c-text {
    width: 43%;
    height: 100%;
    color: rgb(19, 18, 18);
    padding: 0 2vh 0 1vw;
}

.research {
    width: 100vw;
    height: fit-content;
    padding: 2rem 0 0 1rem;
}


.r-flex {
    width: 100%;
    display: flex;
    justify-content: space-between;
    color: rgb(19, 18, 18, 0.9);
}

.r-items {
    width: 50vw;
    height: fit-content;
}

.r-p {
    font-size: 1.5vw;
    line-height: 4vh;
}

.r-items-1 {
    width: 100%;
    height: fit-content;
    display: flex;
}

.r-items-1 img {
    width: 45%;
}

.r-items-1 p {
    align-self: center;
    padding: 2rem .5rem;
    font-weight: bold;
    font-size: 1.3vw;
}

.r-items-2 {
    width: 90%;
    height: 50%;
}

.r-items-2 p {
    font-size: 1.2vw;
    width: 90%;
}

.r-items-2 img{
    width: 80%;
    height: 65%;
}

.awards {
    width: 100%;
    height: fit-content;
    margin-top: 2rem;
    color: rgb(19, 18, 18);
}

.awards h1 {
    font-size: 3rem;
    margin-left: 4vw;
}

.a-p {
    width: 100%;
    font-size: 1.4rem;
    font-weight: bold;
    margin-left: 2vw;
    color: rgb(19, 18, 18, 0.8);
}


.a-stack {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(auto-fit, 23rem);
    gap: 1rem;
    justify-content: center;
    color: rgb(19, 18, 18, 0.9);
    margin-top: 1.5rem;
}


.a-items {
    width: 23rem;
    height: auto;
    min-height: auto;
    padding: 30px 10px 30px 10px;
    border-radius: 2rem;
}

.a-items:hover {
    box-shadow: 2px 2px 30px rgba(0,0,.2);
    transform: translateY(-.5rem);
}

.a-items img {
    width: 100%;
    height: 52%;
    border-radius: 1rem;
}

.a-items h3 {
    font-size: 1.7rem;
    margin-top: 1rem;
    width: 90%;
}

.a-items p {
    width: 90%;
    font-size: 1.4rem;
    color: rgb(19, 18, 18, 0.9);
}

.more {
  margin-top: 5px;
    border: none;
    font-size: 1.3rem;
    font-weight: bold;
    cursor: pointer;
    display: block;
}

/* modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  justify-content: center;
  align-items: center;
}

.modal-content {
  width: 80%;
  height: fit-content;
  background-color: #fff;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #ddd;
  padding-bottom: 10px;
}

.modal-header button {
  font-size: 24px;
  border: none;
  background-color: transparent;
  cursor: pointer;
}

.modal-body {
  padding-top: 20px;
}

.modal-p {
    font-size: 2.1vw;
}
/*Selected works  */

.works {
    width: 100vw;
    height: fit-content;
    margin-top: 3rem;
    color: rgb(19, 18, 18);
}

.works h1, .gallery h1 {
    font-size: 3rem;
    margin-left: 4vw;
}

.w-p, .g-p {
    width: 100;
    font-size: 1.4rem;
    font-weight: bold;
    padding: 1rem 4vw;
    color: rgb(19, 18, 18, 0.8);
}


.w-stack {
    width: 100vw;
    height: fit-content;
    display: grid;
    grid-template-columns: repeat(auto-fit, 50rem);
    gap: 1rem;
    justify-content: center;
    color: rgb(19, 18, 18, 0.9);
    margin-top: 1.5rem;
}


.w-items {
    width: 50rem;
    height: 32rem;
    padding: 2vh 3vw;
    border-radius: 2rem;
    display: flex;
}

.w-items:hover {
    box-shadow: 2px 2px 30px rgba(0,0,.2);
}

.w-items img {
    width: 50%;
    height: 100%;
    border-radius: 1rem;
}

.w-text {
    padding: 1rem;
}
.w-text h3 {
    font-size: 1.9rem;
    margin-top: 1rem;

}

.w-text p {
    font-size: 1.4rem;
    color: rgb(19, 18, 18, 0.9);
}

.gallery {
    width: 100vw;
    height: fit-content;
}

.g-stack {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(auto-fit, 50rem);
    gap: 1rem;
    justify-content: center;
    color: rgb(19, 18, 18, 0.9);
    margin-top: 1.5rem;
}

.g-div-1 {
    width: 50rem;
    height: 60rem;
}

.big {
    width: 100%;
    height: 59%;
    border-radius: 2rem;
}

.small {
    width: 100%;
    height: 40%;
    display: flex; 
    justify-content: space-between; 
}

.g-div {
    width: 50rem;
    height: 60rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.g-img {
    display: flex;
    width: 100%;
    height: 32%;
    gap: 1rem;
}
.small img, .g-img img {
    width: 49%;
    height: 100%;
    border-radius: 1rem;
    margin-top: 1%;
    gap: 1rem;
}

.g-stack img:hover {
    box-shadow: 2px 2px 30px rgba(0,0,.2);
    transform: translateY(-.1rem);
} 
.sitemap {
  width: 100%;
  padding: 30px 0;
  background: #f6f6f6;
  border-radius: 24px;
  margin: 28px 0;
}

.sitemap-inner {
  max-width: var(--site-max);
  margin: 0 auto;
  padding-left: var(--site-margin);
  padding-right: var(--site-margin);
}

.sitemap-cols {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 18px;
  color: #111;
  font-size: 14px;
}

.site-footer {
  margin-top: 30px;
  background: #f1f1f1;
  padding: 24px 0 80px;
  text-align: center;
  border-top-left-radius: 36px;
  border-top-right-radius: 36px;
}

.footer-top small {
  color: var(--muted);
  display: block;
  margin-bottom: 18px;
}

.feynman-big {
  font-weight: 900;
  font-size: 160px;
  letter-spacing: -8px;
  margin: 0 auto 12px;
  line-height: 0.85;
  max-width: 1200px;
  overflow: hidden;
  text-align: center;
}

@media (max-width: 1100px) {
    body {
        padding: 0;
    }

    nav {
        padding: 0 0;
    }

    nav ul {
        width: 65%;
    }
}

@media (max-width: 935px) {
    .research {
        padding-top: 15vh;
    }

    .r-flex {
        display: block;
    }

    .r-items {
        width: 100vw;
        padding: .1vw;
    }

    .r-items-2 {
        width: 100vw;
        padding-top: 4rem;
    }
    
    .modal-p {
        font-size: 2.5vw;
    }
}

@media (max-width: 960px) {
    nav{
        width: 100vw;
        height: 90vh;
        position: sticky;
        top: 0;
        display: none;
    }


    .toggle {
        display: flex;
        flex-wrap: wrap;
        position: absolute;
        z-index: 10000;
    }
    
    nav ul {
        flex-basis: 100%;
        flex-wrap: wrap;
        margin-top: 1rem;
    }

    nav ul li {
        flex-basis: 100%;
    }
    
    nav ul a {
        padding: 0 0  0 4.9vw;
        color: white;
        text-decoration: none;
        text-transform: uppercase;
 }
    nav img {
        margin-left: 15vw;
        height: 3vh;
    }
    .count {
        position: absolute;
        top: 0;
        left: 55%;
    }

    .count p {
        font-size: .8rem;
    }

}

@media (max-width: 860px) {
    .author {
    font-size: 2rem;
    }

    .title, .topic {
        font-weight: bold;
        font-size: 2.5rem;
        line-height: 3rem;
    }


    .desc {
        font-size: 1.5rem;
    }

    .biography {
        display: block;
    }

    .bio-img {
        width: 85%;
    }

    .bio-img img {
        width: 100%;
    }

    .bio-text {
        width: 95%;
        padding: 0 .7rem;
    }

    .career, .research {
        width: 100vw;
        padding: 2rem 0 0 1.2vw;
    }

    .c-graph {
        display: block;
        width: 100%;
    }
    
    .graph {
        width: 90%;
        height: 65vh;
    }
    
    .c-text {
        width: 100%;
        padding: 0 .5rem;}


    .w-stack {
        grid-template-columns: none;
        width: 100vw;
    }    

    .w-items{
        display: block;
        width: 90%;
        height: fit-content;
    }
    
    .w-items img {
        width: 80%;
        height: 90%;
        border-radius: 1rem;
    }

    .w-p {
        width: 95vw;
        padding: 0 1.2vw;
    }


    .r-p{
        font-size: 1.3rem;
        line-height: 2.5vh;
        width: 90%;
    }

    .r-items-1 {
        display: block;
    }

    .r-items-1 p, .r-items-2 p{
        padding-left: 1vw;
        font-weight: normal;
        font-size: 1.3rem;
        width: 90%;
    }

    .g-stack {
        grid-template-columns: none;
    }

    .g-div-1, .g-div {
        width: 95vw;
        padding: .5rem;
    }

    
    .modal-p {
        font-size: 3vw;
    }
}
@media screen and (max-width: 680px) {
    .content {
        padding-right: 0;
    }

    .title {
        font-size: 3rem;
    }

    
    .modal-p {
        font-size: 3.5vw;
    }
}


@media screen and (max-width: 511px) {
    .content {
        padding-right: 0;
    }

    .title {
        font-size: 3rem;
    }

    
    .modal-p {
        font-size: 4.2vw;
    }
     .sitemap-inner {
    padding-left: 16px;
    padding-right: 16px;
  }
  .feynman-big {
    font-size: 72px;
  }
}

/* -------------------------
  Sitemap & Footer — Responsive Patch
   - Add at end of CSS
--------------------------*/

/* container / layout helpers (safe to include if missing) */
:root{
  --site-max: 1200px;
  --site-gap: 1rem;
  --sitemap-bg: #f6f6f6;
  --muted: #6f6f6f;
  --accent: #111;
}

/* Sitemap wrapper */
.sitemap {
  width: 100%;
  padding: 28px 0;
  background: var(--sitemap-bg);
  box-sizing: border-box;
}

/* center & horizontal padding consistent with site layout */
.sitemap-inner {
  max-width: var(--site-max);
  margin: 0 auto;
  padding: 0 1rem; /* small horizontal padding for phones */
  box-sizing: border-box;
}

/* Responsive grid: auto-fit collapses columns to fill row, min width 160px */
.sitemap-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  align-items: start;
  color: #111;
  font-size: 0.95rem;
}

/* Column / block headings */
.sitemap-cols > div strong {
  display:block;
  margin-bottom: .35rem;
  font-weight:700;
}

/* Sitemap link styles — no blue link effect, good contrast, keyboard focus */
.sitemap-cols a {
  color: inherit;               /* inherit text color (not blue) */
  text-decoration: none;        /* remove underline */
  display: inline-block;
  padding: .18rem 0;
  transition: color .15s ease, transform .08s ease;
  outline: none;
}

/* Hover & focus provide clear affordance */
.sitemap-cols a:hover,
.sitemap-cols a:focus {
  color: var(--accent);
  text-decoration: underline;  /* subtle underline on hover/focus */
  transform: translateX(2px);
}

/* Remove annoying browser visited colors */
.sitemap-cols a:visited {
  color: inherit;
}

/* Make sure link tap highlight is not extreme on mobile */
.sitemap-cols a:focus { box-shadow: 0 0 0 3px rgba(23, 23, 23, 0.07); border-radius: 4px; }

/* Footer responsiveness and scale */
.site-footer{
  padding: clamp(1.2rem, 2.5vw, 3.2rem) 1rem clamp(2rem, 6vw, 6rem);
  background:#f1f1f1;
  text-align:center;
  box-sizing:border-box;
}

/* small top text */
.site-footer .footer-top small{
  color: var(--muted);
  display:block;
  margin-bottom: .9rem;
  font-size: clamp(.8rem, 0.9vw, 1rem);
}

/* Huge FEYNMAN text scales down on small screens */
.feynman-big {
  font-weight:900;
  font-size: clamp(48px, 7.5vw, 160px); /* fluid size */
  letter-spacing: -6px;
  margin: .6rem auto 0;
  line-height: .85;
  color: #111;
  max-width: 95%;
  overflow: hidden;
}

/* layout on small screens: sitemap first, footer content stacks nicely */
@media (max-width: 680px) {
  .sitemap-inner { padding-left: 16px; padding-right: 16px; }
  .sitemap-cols { gap: 10px; font-size: .95rem; }
  .site-footer { padding: 1.1rem 1rem 2rem; }
  .feynman-big { font-size: 72px; letter-spacing: -4px; }
}