/* site.css — frosted-glass profile (layout: profile)
   Pale blue-white ground, soft colour blobs, a perspective glass-tile wall
   behind the hero, and content on frosted glass panels. */

:root {
  --ground-1: #eaf2fb;
  --ground-2: #f5f8fc;
  --ink:      #0b1f33;
  --text:     #33475b;
  --muted:    #6b7c8f;
  --accent:   #1d5fd1;
  --volt:     #c6f432;
  --sky:      #9fc3e6;
  --glass:        rgba(255, 255, 255, .52);
  --glass-strong: rgba(255, 255, 255, .7);
  --glass-edge:   rgba(255, 255, 255, .85);
  --hairline:     rgba(11, 31, 51, .08);
  --shadow: 0 1px 0 rgba(255, 255, 255, .9) inset,
            0 -1px 0 rgba(11, 31, 51, .04) inset,
            0 20px 50px -20px rgba(11, 31, 51, .22),
            0 4px 12px rgba(11, 31, 51, .05);
  --font: Geist, Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, var(--ground-1) 0%, var(--ground-2) 55%, #eef3f9 100%);
  color: var(--text);
  font: 16px/1.7 var(--font);
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
strong { color: var(--ink); font-weight: 600; }

/* --- Backdrop: soft colour blobs that the glass blurs --- */
.backdrop { position: fixed; inset: 0; z-index: -2; overflow: hidden; pointer-events: none; }
.blob { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .75; }
.blob-a { width: 520px; height: 520px; left: -140px; top: -120px; background: var(--sky); }
.blob-b { width: 380px; height: 380px; right: -100px; top: 120px; background: var(--volt); opacity: .45; }
.blob-c { width: 560px; height: 560px; left: 30%; top: 55%; background: #c9d8ff; opacity: .6; }

/* --- Glass wall: tilted grid of bevelled tiles behind the hero --- */
.wall {
  position: absolute;
  inset: 0 0 auto;
  height: 560px;
  z-index: -1;
  overflow: hidden;
  perspective: 900px;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 30%, transparent 100%);
          mask-image: linear-gradient(180deg, #000 30%, transparent 100%);
}
.wall-plane {
  position: absolute;
  left: 50%;
  top: -40px;
  width: 1500px;
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 14px;
  transform: translateX(-50%) translateY(var(--drift, 0px)) rotateX(38deg) rotateZ(-8deg);
  transform-origin: 50% 0;
}
.tile {
  height: 120px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(255, 255, 255, .75), rgba(255, 255, 255, .18));
  border: 1px solid rgba(255, 255, 255, .9);
  box-shadow: inset 2px 2px 0 rgba(255, 255, 255, .8),
              inset -2px -3px 6px rgba(11, 31, 51, .06),
              6px 10px 22px rgba(11, 31, 51, .08);
  -webkit-backdrop-filter: blur(6px);
          backdrop-filter: blur(6px);
}
.tile:nth-child(20n + 11) { margin-left: 50%; }   /* brick offset feel */
.tile:nth-child(7n) { background: linear-gradient(135deg, rgba(198, 244, 50, .35), rgba(255, 255, 255, .2)); }
.tile:nth-child(9n + 4) { background: linear-gradient(135deg, rgba(159, 195, 230, .55), rgba(255, 255, 255, .2)); }

/* --- Shared glass surface --- */
.glass, main > section {
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  border-radius: 28px;
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
          backdrop-filter: blur(24px) saturate(160%);
}

.page {
  max-width: 820px;
  margin: 0 auto;
  padding-block: 96px 40px;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  display: grid;
  gap: 20px;
}
main { display: grid; gap: 20px; }

/* --- Hero --- */
.hero {
  display: flex;
  gap: 32px;
  align-items: center;
  padding: 32px;
  background: var(--glass-strong);
}
.hero-photo {
  width: 160px;
  height: 200px;
  flex: none;
  border-radius: 20px;
  object-fit: cover;
  border: 4px solid rgba(255, 255, 255, .9);
  box-shadow: 0 14px 30px -10px rgba(11, 31, 51, .35);
}
.hero-text { min-width: 0; }
.hero h1 {
  margin: 0;
  color: var(--ink);
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: -.035em;
  line-height: 1.1;
  text-wrap: balance;
}
.hero-role {
  display: inline-block;
  margin: 12px 0 0;
  padding: 3px 12px;
  border-radius: 999px;
  background: rgba(198, 244, 50, .5);
  border: 1px solid rgba(255, 255, 255, .9);
  color: var(--ink);
  font-size: .875rem;
  font-weight: 600;
}
.hero-tagline { margin: 12px 0 0; color: var(--text); }
.hero-prev { margin: 6px 0 0; color: var(--muted); font-size: .875rem; }
.hero-prev span { margin-right: 6px; font: 500 .7rem/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.hero-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.hero-links a {
  padding: 7px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .6);
  border: 1px solid var(--glass-edge);
  box-shadow: inset 0 1px 0 #fff, 0 2px 8px rgba(11, 31, 51, .06);
  color: var(--ink);
  font-size: .875rem;
  font-weight: 500;
  transition: transform .15s, box-shadow .15s, background .15s;
}
.hero-links a:first-child { background: var(--ink); border-color: var(--ink); color: #fff; box-shadow: 0 6px 16px -6px rgba(11, 31, 51, .6); }
.hero-links a:hover { text-decoration: none; transform: translateY(-1px); box-shadow: inset 0 1px 0 #fff, 0 6px 16px rgba(11, 31, 51, .1); }

/* --- Sections --- */
main > section { padding: 32px; }
h2 {
  margin: 0 0 18px;
  color: var(--ink);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -.015em;
}
h3 {
  margin: 26px 0 6px;
  color: var(--muted);
  font: 500 .72rem/1.4 var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
}
p { margin: 0 0 1em; }
section > p:last-child { margin-bottom: 0; }

/* --- Top nav: floating glass pill --- */
.topnav {
  position: fixed;
  z-index: 20;
  top: calc(14px + env(safe-area-inset-top, 0px));
  left: 50%;
  transform: translateX(-50%);
  width: min(820px, calc(100% - 32px));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 8px 8px 20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .45);
  transition: background .25s, box-shadow .25s;
}
.topnav.scrolled { background: rgba(255, 255, 255, .72); }
.topnav-name { color: var(--ink); font-weight: 700; letter-spacing: -.01em; }
.topnav-links { display: flex; gap: 2px; }
.topnav-links a { padding: 6px 14px; border-radius: 999px; color: var(--text); font-size: .875rem; font-weight: 500; }
.topnav a:hover { text-decoration: none; }
.topnav-links a:hover { background: rgba(255, 255, 255, .85); color: var(--ink); }
section[id] { scroll-margin-top: 84px; }

/* --- Experience: glass timeline --- */
.timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px; top: 10px; bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--volt), var(--sky) 40%, rgba(159, 195, 230, .2));
}
.stop { position: relative; display: grid; grid-template-columns: 16px minmax(0, 1fr); gap: 18px; padding: 0 0 22px; }
.stop:last-child { padding-bottom: 0; }
.stop-dot {
  width: 16px; height: 16px; margin-top: 5px;
  border-radius: 50%;
  background: linear-gradient(145deg, #fff, var(--sky));
  border: 1px solid #fff;
  box-shadow: 0 2px 6px rgba(11, 31, 51, .18), inset 1px 1px 0 #fff;
}
.is-now .stop-dot { background: linear-gradient(145deg, #f3ffc9, var(--volt)); box-shadow: 0 0 0 5px rgba(198, 244, 50, .28), 0 2px 6px rgba(11, 31, 51, .18); }
.stop-head { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin: 0; font-weight: 600; color: var(--ink); }
.stop-head a { font-weight: 600; }
.stop-when {
  padding: 1px 8px; border-radius: 999px;
  background: rgba(198, 244, 50, .5); border: 1px solid #fff;
  color: var(--ink); font: 500 .68rem/1.6 var(--mono); letter-spacing: .06em; text-transform: uppercase;
}
.stop-role { margin: 0; color: var(--muted); font-size: .9rem; }
.stop-note { margin: 4px 0 0; font-size: .95rem; }

/* --- Research areas: thick glass tiles --- */
.areas { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.area {
  padding: 20px;
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(255, 255, 255, .85), rgba(255, 255, 255, .45));
  border: 1px solid #fff;
  box-shadow: inset 2px 2px 0 rgba(255, 255, 255, .9),
              inset -2px -3px 8px rgba(11, 31, 51, .05),
              0 12px 24px -12px rgba(11, 31, 51, .2);
  transition: transform .2s;
}
.area { position: relative; overflow: hidden; }
.area:hover { transform: translateY(-3px); }
/* light sweep across glass on hover */
.area::after, .hero-links a::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 35%, rgba(255, 255, 255, .75) 50%, transparent 65%);
  transform: translateX(-120%);
  pointer-events: none;
}
.area:hover::after, .hero-links a:hover::after { transform: translateX(120%); transition: transform .9s ease; }
.hero-links a { position: relative; overflow: hidden; }

/* 3D glass icon chip */
.glass-icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, .95);
  box-shadow: inset 2px 2px 0 rgba(255, 255, 255, .9),
              inset -3px -4px 8px rgba(11, 31, 51, .12),
              0 10px 18px -8px rgba(11, 31, 51, .35);
}
.glass-icon svg { width: 24px; height: 24px; fill: none; stroke: #fff; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; filter: drop-shadow(0 1px 1px rgba(11, 31, 51, .35)); }
.tint-blue   { background: linear-gradient(145deg, #cfe3ff, #5b8fe0); }
.tint-volt   { background: linear-gradient(145deg, #f1ffc2, #9fcf1a); }
.tint-violet { background: linear-gradient(145deg, #e6deff, #8a79e0); }
.area h4 { margin: 0 0 8px; color: var(--ink); font-size: 1rem; font-weight: 600; }
.area p { margin: 0; font-size: .9rem; line-height: 1.6; }

/* --- Papers --- */
.papers { list-style: none; margin: 0; padding: 0; }
.paper {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--hairline);
}
.paper:last-child { border-bottom: 0; padding-bottom: 0; }
.paper-year {
  align-self: start;
  justify-self: start;
  padding: 2px 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .75);
  border: 1px solid #fff;
  box-shadow: 0 2px 6px rgba(11, 31, 51, .06);
  color: var(--muted);
  font: 500 .75rem/1.6 var(--mono);
}
.paper-title { color: var(--ink); font-weight: 600; line-height: 1.45; }
.paper-title:hover { color: var(--accent); }
.paper-authors { margin: 6px 0 0; color: var(--muted); font-size: .85rem; line-height: 1.55; }
details.paper-authors summary { cursor: pointer; list-style: none; }
details.paper-authors summary::-webkit-details-marker { display: none; }
details.paper-authors summary::after { content: " · show all"; color: var(--accent); }
details.paper-authors[open] summary { display: none; }
details.paper-authors p { margin: 0; }
.paper-summary p {
  margin: 6px 0 0;
  font-size: .92rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.paper:hover .paper-summary p { -webkit-line-clamp: unset; }

/* --- Entrance: cards rise in as they scroll into view (JS only) --- */
.js .reveal { opacity: 0; transform: translateY(18px); }
.js .reveal.in { opacity: 1; transform: none; transition: opacity .7s ease, transform .8s cubic-bezier(.2, .7, .2, 1); }

/* --- Service --- */
.service p { font-size: .95rem; }

footer { padding: 8px 4px; color: var(--muted); font: 500 .75rem/1.6 var(--mono); letter-spacing: .04em; }

@media (max-width: 720px) {
  .areas { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .page { padding-block: 84px 24px; gap: 14px; }
  main { gap: 14px; }
  .hero { flex-direction: column; align-items: flex-start; gap: 20px; padding: 24px; }
  .hero-photo { width: 128px; height: 160px; }
  .hero h1 { font-size: 2.1rem; }
  main > section { padding: 24px 20px; border-radius: 22px; }
  .paper { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .wall { height: 420px; }
  .topnav { padding-left: 16px; }
  .topnav-name { font-size: .9rem; }
  .topnav-links a { padding: 6px 9px; font-size: .8rem; }
}
@media (max-width: 380px) {
  .topnav-name { display: none; }
  .topnav { justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}