:root {
  color-scheme:light;
  --bg:#fff;
  --text:#111;
  --muted:#696969;
  --border:#e7e7e7;
  --hover:#f2f2f2;
  --dock:rgba(255,255,255,.96);
}

html[data-theme=dark] {
  color-scheme:dark;
  --bg:#101010;
  --text:#f5f5f5;
  --muted:#a8a8a8;
  --border:#303030;
  --hover:#262626;
  --dock:rgba(22,22,22,.96);
}

.theme-icon-moon,.theme-icon-sun[hidden],.theme-icon-moon[hidden] { display:none; }
.theme-icon-sun:not([hidden]),.theme-icon-moon:not([hidden]) { display:block; }
html[data-theme=dark] .theme-icon-sun:not([hidden]) { display:none; }
html[data-theme=dark] .theme-icon-moon:not([hidden]) { display:block; }
html[data-theme=light] .theme-icon-sun:not([hidden]) { display:block; }
html[data-theme=light] .theme-icon-moon:not([hidden]) { display:none; }

* {
  box-sizing:border-box;
}

html {
  scroll-padding-top:24px;
  scroll-padding-bottom:var(--dock-clearance,100px);
}

body {
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

a {
  color:var(--text);
  text-decoration:underline;
  text-underline-offset:3px;
}

a:hover {
  color:var(--muted);
}

a:focus-visible,button:focus-visible {
  outline:2px solid var(--text);
  outline-offset:4px;
  border-radius:4px;
}

button {
  font:inherit;
  cursor:pointer;
}

[hidden] {
  display:none!important;
}

.page {
  max-width:688px;
  margin:0 auto;
  padding:76px 24px calc(120px + env(safe-area-inset-bottom,0px));
}

p {
  margin:0 0 16px;
}

h1,h2,h3 {
  line-height:1.25;
  margin:0;
  font-weight:700;
  letter-spacing:-.025em;
}

h1 {
  font-size:48px;
  letter-spacing:-.055em;
}

h2 {
  font-size:21px;
  margin-bottom:12px;
}

h3 {
  font-size:15px;
}

section {
  padding:24px 0;
  scroll-margin-top:20px;
}

.intro {
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap:24px;
  padding:0 0 16px;
}

.intro>div {
  flex:1;
  min-width:0;
}

.intro-description {
  font-size:19px;
  line-height:1.45;
  margin:10px 0 0;
}

.location {
  display:flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  font-weight:500;
  letter-spacing:.015em;
  color:var(--muted);
  margin:16px 0 0;
}
.location svg { flex-shrink:0; }
.avatar {
  position:relative;
  width:240px;
  height:240px;
  flex-shrink:0;
  border-radius:50%;
  border:1px solid var(--border);
  overflow:hidden;
  margin:4px 0 0;
  background:var(--hover);
}
.avatar img {
  position:absolute;
  width:220%;
  height:220%;
  left:-60%;
  top:-22%;
  object-fit:cover;
  object-position:center top;
}
.name-greeting { white-space:nowrap; }
.wave {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  vertical-align:baseline;
  min-width:44px;
  min-height:44px;
  padding:0;
  border:0;
  border-radius:10px;
  background:transparent;
  color:inherit;
  font:inherit;
  line-height:1;
}
.wave span {
  display:inline-block;
  transform-origin:70% 75%;
}
.wave:hover { background:var(--hover); }
.wave.is-waving span { animation:wave-hello 1s ease-in-out; }
@keyframes wave-hello {
  0%,100% { transform:rotate(0deg); }
  15% { transform:rotate(18deg); }
  30% { transform:rotate(-10deg); }
  45% { transform:rotate(18deg); }
  60% { transform:rotate(-7deg); }
  75% { transform:rotate(12deg); }
}
.profile-links {
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
}
.profile-link {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:7px;
  min-height:44px;
  padding:0 12px;
  border:1px solid var(--border);
  border-radius:8px;
  text-decoration:none;
  font-weight:500;
  transition:background-color .15s ease,border-color .15s ease;
}
.profile-link:hover {
  color:var(--text);
  background:var(--hover);
  border-color:var(--muted);
}
.profile-link svg { flex-shrink:0; }

.intro+.profile-links {
  margin-bottom:20px;
}

.about-copy {
  color:var(--muted);
  font-size:15px;
  line-height:1.8;
}
.about-copy p { margin:0 0 12px; }
.about-copy strong { color:var(--text); font-weight:500; }

.skills {
  margin:20px 0 0;
  font-size:13px;
}

.skills>div {
  display:grid;
  grid-template-columns:80px 1fr;
  gap:10px;
  margin:8px 0;
}

.skills dt {
  font-weight:500;
}

.skills dd {
  margin:0;
  color:var(--muted);
}

.entry {
  display:flex;
  gap:12px;
  padding:14px 0;
}

.entry:first-child {
  padding-top:4px;
}

.org-logo {
  width:62px;
  height:62px;
  object-fit:contain;
  flex-shrink:0;
  background:#fff;
  border:1px solid #e7e7e7;
  border-radius:50%;
  padding:5px;
}

.org-logo-iitbhu {
  padding:2px;
}

.org-logo-uwaterloo,.org-logo-samsung {
  padding:0;
}

.entry-body {
  flex:1;
  min-width:0;
}

.entry-heading {
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  gap:8px 12px;
  flex-wrap:wrap;
}

.entry time,.meta {
  font-size:12px;
  color:var(--muted);
}

.role {
  font-size:13px;
  margin:4px 0 7px;
}

.description {
  color:var(--muted);
  font-size:13px;
  line-height:1.65;
  margin:0;
}

.feature-heading {
  text-align:center;
  margin:20px 0 24px;
}

.section-label {
  display:inline-block;
  padding:3px 10px;
  background:var(--text);
  color:var(--bg);
  border-radius:6px;
  font-size:12px;
  font-weight:500;
  margin-bottom:12px;
}

.feature-heading h2,#contact h2 {
  font-size:34px;
  letter-spacing:-.045em;
  margin-bottom:12px;
}

.feature-heading>p:last-child {
  color:var(--muted);
  font-size:15px;
  max-width:470px;
  margin:0 auto;
}

.project-grid {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
}

.project {
  display:flex;
  flex-direction:column;
  padding:18px;
  border:1px solid var(--border);
  border-radius:10px;
}

.project h3 {
  margin-bottom:10px;
}

.technologies {
  font-size:11px;
  font-weight:500;
  margin:16px 0 14px;
  color:var(--text);
}

.project-links {
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  font-size:12px;
  margin-top:auto;
}

.subheading {
  font-size:13px;
  font-weight:500;
  color:var(--muted);
  margin:24px 0 14px;
}

.publications,.patents {
  list-style:none;
  margin:0;
  padding:0;
}

#research .feature-heading h2 {
  font-size:30px;
}
.research-group-heading {
  display:flex;
  justify-content:space-between;
  align-items:center;
  font-size:14px;
  font-weight:600;
  letter-spacing:0;
  margin:28px 0 14px;
}
.research-group-heading span {
  color:var(--muted);
  font-size:12px;
  font-weight:400;
  font-variant-numeric:tabular-nums;
}
.publications li {
  padding:20px;
  background:var(--bg);
}
.publications .meta {
  margin:0 0 14px;
  font-size:12px;
}
.publications .description {
  margin-bottom:20px;
}
.publications .paper-link {
  align-self:flex-start;
  margin-top:auto;
  padding:6px 10px;
  border:1px solid var(--border);
  border-radius:6px;
  font-size:12px;
  text-decoration:none;
}
.publications .paper-link:hover {
  background:var(--hover);
  color:var(--text);
}
.paper-detail {
  font-size:11px;
  color:var(--muted);
  margin:auto 0 0;
}
.patents-heading {
  margin-top:28px;
}
.patents {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
.patents h3 {
  font-size:13px;
  font-weight:700;
  letter-spacing:0;
  line-height:1.6;
}
.organization-link {
  text-decoration:none;
}

.organization-link:hover {
  text-decoration:underline;
}

.dock-group {
  display:flex;
  align-items:flex-end;
  gap:2px;
}

.patents li {
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:12px;
  padding:16px;
  border:1px solid var(--border);
  border-radius:10px;
}
.patents .meta {
  margin-top:auto;
  font-size:11px;
  font-variant-numeric:tabular-nums;
}

#contact {
  text-align:center;
  padding-top:54px;
}

#contact>p:not(.section-label) {
  color:var(--muted);
  font-size:15px;
}

#contact .profile-links {
  justify-content:center;
}

footer {
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:26px 0 0;
  margin-top:20px;
  font-size:12px;
  color:var(--muted);
}

footer a {
  color:var(--muted);
}

.skip-link {
  position:absolute;
  top:8px;
  left:8px;
  padding:8px 16px;
  background:var(--bg);
  border:1px solid var(--border);
  transform:translateY(-200%);
  z-index:10;
}

.skip-link:focus {
  transform:none;
}

.dock {
  position:fixed;
  bottom:calc(16px + env(safe-area-inset-bottom,0px));
  left:50%;
  transform:translateX(-50%);
  display:flex;
  align-items:flex-end;
  gap:2px;
  padding:6px;
  background:var(--dock);
  border:1px solid var(--border);
  border-radius:999px;
  box-shadow:0 4px 18px rgba(0,0,0,.08);
  backdrop-filter:blur(12px);
  z-index:20;
}

.dock-control {
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  width:var(--dock-size,44px);
  height:var(--dock-size,44px);
  flex-shrink:0;
  border:0;
  border-radius:50%;
  background:transparent;
  color:var(--text);
  text-decoration:none;
  transition:width .25s cubic-bezier(.2,.8,.2,1.15),height .25s cubic-bezier(.2,.8,.2,1.15),background-color .15s ease;
}

.dock-control:hover {
  background:var(--hover);
  color:var(--text);

}

.dock-control svg {
  width:calc(var(--dock-size,44px) * .455);
  height:calc(var(--dock-size,44px) * .455);
  flex-shrink:0;
  transition:width .25s cubic-bezier(.2,.8,.2,1.15),height .25s cubic-bezier(.2,.8,.2,1.15);
}

.dock-divider {
  height:28px;
  width:1px;
  background:var(--border);
  margin:8px 4px;
}

.dock-tooltip {
  position:absolute;
  bottom:calc(100% + 12px);
  left:50%;
  transform:translateX(-50%);
  background:var(--text);
  color:var(--bg);
  padding:4px 8px;
  border-radius:5px;
  font-size:12px;
  white-space:nowrap;
  visibility:hidden;
  opacity:0;
  pointer-events:none;
}

.dock-control:hover .dock-tooltip,.dock-control:focus-visible .dock-tooltip {
  visibility:visible;
  opacity:1;
}

@media(max-width:600px) {
  .profile-links {
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page {
    padding:44px 20px calc(120px + env(safe-area-inset-bottom,0px));
  }
  h1 {
    font-size:34px;
  }
  .intro {
    gap:16px;
  }
  .intro-description {
    font-size:16px;
  }
  .avatar {
    width:176px;
    height:176px;
  }
  .project-grid,.patents {
    grid-template-columns:1fr;
  }
  .entry-heading {
    display:block;
  }
  .entry time {
    display:block;
    margin-top:4px;
  }
  .skills>div {
    grid-template-columns:1fr;
    gap:2px;
  }
  .feature-heading h2,#contact h2 {
    font-size:29px;
  }
  #research .feature-heading h2 {
    font-size:27px;
  }
  .dock {
    bottom:calc(12px + env(safe-area-inset-bottom,0px));
  }
}

@media(max-width:360px) {
  .page {
    padding-left:16px;
    padding-right:16px;
  }
  h1 {
    font-size:29px;
  }
  .intro {
    gap:12px;
  }
  .avatar {
    width:144px;
    height:144px;
  }
  .intro-description {
    font-size:15px;
  }
  .dock {
    gap:0;
  }
  .dock-divider {
    margin:8px 3px;
  }
}

@media(max-width:480px) {
  html {
    scroll-padding-bottom:var(--dock-clearance,100px);
  }
  .dock-socials>a,.theme-divider {
    display:none;
  }
  .dock {
    flex-direction:row;
    align-items:center;
    justify-content:center;
    width:max-content;
    max-width:calc(100vw - 16px);
    gap:0;
    padding:4px 6px;
    border-radius:999px;
  }
  .dock-group {
    flex-shrink:0;
    gap:0;
  }
  .dock-control {
    flex:0 0 44px;
    width:44px;
    height:44px;
  }
  .dock-divider {
    flex-shrink:0;
    margin:8px 2px;
  }
  .page {
    padding-bottom:calc(120px + env(safe-area-inset-bottom,0px));
  }
}

@media(max-width:383px) {
  .section-divider,.theme-divider {
    display:none;
  }
}

@media(prefers-reduced-motion:reduce) {
  .dock-control,.dock-control svg {
    transition:none;
  }
  .dock-control:hover {
    transform:none;
  }
}

@media(forced-colors:active) {
  .project,.org-logo,.dock {
    border:1px solid CanvasText;
  }
  .dock-control svg {
    color:ButtonText;
  }
}

.publications h3 {
  min-height:4.2em;
  font-size:15px;
  font-weight:700;
  line-height:1.4;
}

/* Full descriptions stay visible unless JavaScript enables the disclosure. */
.job {
  border:1px solid transparent;
  border-radius:12px;
  padding:12px 12px 12px 0;
  transition:background-color .2s ease,border-color .2s ease;
}
.job .org-logo { margin-left:-1px; }
.job:first-child { padding-top:12px; }
.job.is-collapsible { cursor:pointer; }
.job:hover,.job:focus-within,.job[data-expanded="true"] {
  background:var(--hover);
  border-color:var(--border);
}
.job-title {
  display:flex;
  align-items:center;
  gap:4px;
  min-width:0;
}
.job-toggle {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  width:44px;
  height:44px;
  margin:-10px 0;
  border:0;
  border-radius:8px;
  background:transparent;
  color:var(--text);
  opacity:0;
  transition:opacity .2s ease,background-color .2s ease;
}
.job:hover .job-toggle,.job:focus-within .job-toggle {
  opacity:1;
}
.job-toggle:hover { background:var(--border); }
.job-toggle svg { transition:transform .3s cubic-bezier(.22,1,.36,1); }
.job-toggle[aria-expanded="true"] svg { transform:rotate(90deg); }
.job-details {
  display:grid;
  grid-template-rows:1fr;
  opacity:1;
  transition:grid-template-rows .3s cubic-bezier(.22,1,.36,1),opacity .25s ease;
}
.job-details-inner {
  min-height:0;
  overflow:hidden;
  color:var(--muted);
  font-size:13px;
  line-height:1.75;
  transition:transform .3s cubic-bezier(.22,1,.36,1);
}
.job-details-inner p { margin:8px 0 10px; }
.job-details-inner ul { padding-left:18px; margin:8px 0 4px; }
.job-details-inner li+li { margin-top:6px; }
.experience-tech { font-size:12px; }
.job.is-collapsible[data-expanded="false"] .job-details {
  grid-template-rows:0fr;
  opacity:0;
}
.job.is-collapsible[data-expanded="false"] .job-details-inner {
  transform:translateY(-6px);
}
@media(hover:none),(pointer:coarse) {
  .job-toggle { opacity:1; }
}
@media(prefers-reduced-motion:reduce) {
  .job,.job-toggle,.job-toggle svg,.job-details,.job-details-inner { transition:none; }
}

@media(max-width:600px) {
  .publications h3 { min-height:0; }
}

@media(prefers-reduced-motion:reduce) {
  .wave.is-waving span { animation:none; }
  .profile-link { transition:none; }
}