/* ============================================================
   ISALGO — Immunosequencing Algorithms Laboratory
   Refined, Apple-inspired single-scroll site.
   Palette pulled from the lab logo: ink navy, teal, amber, slate.
   ============================================================ */

:root {
  --teal:      #16a085;
  --teal-deep: #0f7a64;
  --amber:     #f0a93f;
  --amber-fill:#ffbd59;
  --slate:     #34495e;

  /* light theme */
  --bg:        #ffffff;
  --bg-2:      #f4f6f8;
  --surface:   #ffffff;
  --ink:       #1a2332;
  --ink-soft:  #54657a;
  --line:      #e6e9ee;
  --shadow:    0 1px 2px rgba(26,35,50,.05), 0 18px 40px -22px rgba(26,35,50,.22);
  --nav-bg:    rgba(255,255,255,.72);

  --maxw: 1160px;
  --pad: clamp(20px, 5vw, 64px);
  --r: 22px;
  --ease: cubic-bezier(.22,.61,.36,1);
  --font-head: "Schibsted Grotesk", sans-serif;
  --font-body: "Hanken Grotesk", sans-serif;
  --font-word: "Baloo 2", sans-serif;
}

[data-theme="dark"] {
  --bg:        #1a2332;
  --bg-2:      #141c29;
  --surface:   #212d40;
  --ink:       #eef2f7;
  --ink-soft:  #9cadbf;
  --line:      rgba(255,255,255,.10);
  --shadow:    0 1px 2px rgba(0,0,0,.3), 0 22px 50px -24px rgba(0,0,0,.7);
  --nav-bg:    rgba(20,28,41,.66);
  --teal:      #25c39d;
  --amber:     #ffbd59;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .5s var(--ease), color .5s var(--ease);
  overflow-x: hidden;
}

a { color: inherit; }
img { display: block; max-width: 100%; }
sup { font-size: .62em; }

/* ---------- shared layout ---------- */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(80px, 12vh, 150px) var(--pad);
}
.section__head { max-width: 760px; margin-bottom: clamp(40px, 6vw, 72px); }
.kicker {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .76rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 18px;
}
.section__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.04;
  letter-spacing: -.02em;
  margin: 0;
}
.section__sub {
  margin: 20px 0 0;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--ink-soft);
  max-width: 60ch;
}

/* ---------- NAV ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background .4s var(--ease), border-color .4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom-color: var(--line);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px var(--pad);
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand__mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--teal), var(--teal-deep));
  display: grid; place-items: center;
  box-shadow: 0 4px 12px -4px var(--teal);
}
.brand__dot { width: 11px; height: 11px; border-radius: 50%; background: var(--amber-fill); }
.brand__word {
  font-family: var(--font-word);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -.01em;
  color: var(--ink);
}
.nav__links { margin-left: auto; display: flex; gap: 30px; }
.nav__links a {
  text-decoration: none;
  font-weight: 500;
  font-size: .95rem;
  color: var(--ink-soft);
  position: relative;
  transition: color .25s;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -5px; width: 0; height: 2px;
  background: var(--teal); border-radius: 2px; transition: width .28s var(--ease);
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { width: 100%; }

.theme-toggle {
  margin-left: 4px;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  display: grid; place-items: center;
  transition: transform .3s var(--ease), border-color .25s, background .25s;
}
.theme-toggle:hover { transform: rotate(18deg); border-color: var(--teal); }
.theme-toggle svg { stroke: currentColor; fill: none; stroke-width: 1.8; }
.icon-moon { display: none; fill: currentColor; stroke: none; }
[data-theme="dark"] .icon-sun  { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 130px var(--pad) 90px;
  overflow: hidden;
}
.hero__atmos { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.blob {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: .5;
}
.blob--teal {
  width: 50vw; height: 50vw; max-width: 620px; max-height: 620px;
  top: -8%; left: -6%;
  background: radial-gradient(circle, var(--teal), transparent 68%);
}
.blob--amber {
  width: 42vw; height: 42vw; max-width: 520px; max-height: 520px;
  bottom: -10%; right: -4%;
  background: radial-gradient(circle, var(--amber-fill), transparent 66%);
  opacity: .42;
}
.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 54px 54px;
  -webkit-mask-image: radial-gradient(ellipse 80% 65% at 50% 42%, #000 35%, transparent 78%);
          mask-image: radial-gradient(ellipse 80% 65% at 50% 42%, #000 35%, transparent 78%);
  opacity: .55;
}
.hero__inner { position: relative; z-index: 1; max-width: 880px; }
.hero__logo {
  margin: 0 auto 34px;
  width: clamp(220px, 34vw, 360px);
}
.hero__logo img {
  width: 100%; height: auto; border-radius: var(--r);
  box-shadow: var(--shadow);
}
.hero__eyebrow {
  font-family: var(--font-head);
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  font-size: .82rem;
  color: var(--teal);
  margin: 0 0 14px;
}
.hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.6rem, 8vw, 5.4rem);
  line-height: 1.0;
  letter-spacing: -.035em;
  margin: 0 0 26px;
}
.hero__title em {
  font-style: normal;
  background: linear-gradient(105deg, var(--teal), var(--amber));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__lead {
  max-width: 60ch; margin: 0 auto 36px;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--ink-soft);
}
.hero__cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.btn {
  --b: var(--teal);
  display: inline-flex; align-items: center;
  padding: 13px 26px;
  border-radius: 100px;
  font-family: var(--font-head);
  font-weight: 600; font-size: .98rem;
  text-decoration: none;
  transition: transform .25s var(--ease), box-shadow .25s, background .25s, color .25s;
}
.btn--primary {
  background: var(--ink); color: var(--bg);
  box-shadow: 0 12px 28px -12px rgba(26,35,50,.6);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 18px 34px -12px rgba(26,35,50,.7); }
.btn--ghost { border: 1px solid var(--line); color: var(--ink); }
.btn--ghost:hover { border-color: var(--teal); color: var(--teal); transform: translateY(-2px); }

.scroll-cue {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  width: 24px; height: 38px; border: 2px solid var(--ink-soft);
  border-radius: 14px; opacity: .55; z-index: 1;
}
.scroll-cue span {
  position: absolute; top: 7px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 7px; border-radius: 3px; background: var(--ink-soft);
  animation: cue 1.7s var(--ease) infinite;
}
@keyframes cue { 0%{opacity:0;transform:translate(-50%,0)} 35%{opacity:1} 75%{opacity:0;transform:translate(-50%,12px)} 100%{opacity:0} }

/* ---------- STATEMENT ---------- */
.statement {
  background: var(--bg-2);
  border-block: 1px solid var(--line);
  transition: background .5s var(--ease);
}
.statement__text {
  max-width: 980px; margin: 0 auto;
  padding: clamp(70px, 12vh, 130px) var(--pad);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.6rem, 4.4vw, 3rem);
  line-height: 1.22;
  letter-spacing: -.02em;
  text-align: center;
}
.statement__text span {
  background: linear-gradient(105deg, var(--teal), var(--amber));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- RESEARCH ---------- */
.research__grid {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
}
.research__grid > li:first-child { grid-column: 1 / -1; }
.rcard {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: clamp(28px, 3vw, 40px);
  overflow: hidden;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s;
}
.rcard::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 4px;
  background: linear-gradient(var(--teal), var(--amber));
  transform: scaleY(0); transform-origin: top; transition: transform .45s var(--ease);
}
.rcard:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: transparent; }
.rcard:hover::before { transform: scaleY(1); }
.rcard__num {
  font-family: var(--font-head); font-weight: 800;
  font-size: 1rem; color: var(--amber);
  letter-spacing: .05em;
}
.rcard h3 {
  font-family: var(--font-head); font-weight: 700;
  font-size: clamp(1.25rem, 2.2vw, 1.6rem);
  margin: 10px 0 12px; letter-spacing: -.01em;
}
.rcard p { margin: 0; color: var(--ink-soft); }

/* ---------- TOOLS ---------- */
.tools__grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.tool {
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s;
}
.tool:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: var(--teal); }
.tool__logo {
  aspect-ratio: 1.41 / 1;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.tool__logo img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.tool:hover .tool__logo img { transform: scale(1.04); }
.tool__body { padding: 24px 26px 28px; display: flex; flex-direction: column; gap: 14px; flex: 1; }
.tool__body p { margin: 0; color: var(--ink-soft); font-size: .98rem; flex: 1; }
.link-arrow {
  font-family: var(--font-head); font-weight: 600; font-size: .92rem;
  text-decoration: none; color: var(--teal);
  display: inline-flex; align-items: center; gap: 6px;
  word-break: break-all;
}
.link-arrow::after { content: "→"; transition: transform .25s var(--ease); }
.link-arrow:hover::after { transform: translateX(4px); }

/* ---------- PUBLICATIONS ---------- */
.pubs { max-width: none; padding-inline: 0; }
.pubs .section__head { max-width: 760px; margin-inline: auto; padding-inline: var(--pad); }
.pubs__rail {
  display: flex; gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 8px var(--pad) 32px;
  scrollbar-width: thin;
}
.pubs__rail::-webkit-scrollbar { height: 8px; }
.pubs__rail::-webkit-scrollbar-thumb { background: var(--line); border-radius: 8px; }
.pub {
  scroll-snap-align: start;
  flex: 0 0 clamp(280px, 80vw, 360px);
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
}
.pub:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.pub__cover {
  aspect-ratio: 3 / 4; background: var(--bg-2); overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.pub__cover img { width: 100%; height: 100%; object-fit: cover; }
.pub__meta { padding: 22px 24px 26px; display: flex; flex-direction: column; gap: 10px; }
.pub__badge {
  align-self: flex-start;
  font-family: var(--font-head); font-weight: 700;
  font-size: .72rem; letter-spacing: .04em;
  padding: 5px 12px; border-radius: 100px;
  background: color-mix(in srgb, var(--teal) 14%, transparent);
  color: var(--teal); text-decoration: none;
  transition: background .25s;
}
a.pub__badge:hover { background: color-mix(in srgb, var(--teal) 26%, transparent); }
.pub__badge--press { background: color-mix(in srgb, var(--amber) 22%, transparent); color: var(--amber); }
.pub__meta h3 {
  font-family: var(--font-head); font-weight: 700;
  font-size: 1.1rem; line-height: 1.25; margin: 4px 0 0; letter-spacing: -.01em;
}
.pub__meta p { margin: 0; font-size: .93rem; color: var(--ink-soft); }
.pub__meta p a { color: var(--teal); text-decoration: none; font-weight: 600; }
.pub__meta p a:hover { text-decoration: underline; }
.pubs__hint {
  text-align: center; color: var(--ink-soft); font-size: .85rem;
  letter-spacing: .1em; text-transform: uppercase; margin: 4px 0 0;
}

/* ---------- TEAM ---------- */
.team__group {
  font-family: var(--font-head); font-weight: 700;
  font-size: 1.4rem; letter-spacing: -.01em;
  margin: clamp(36px, 5vw, 56px) 0 28px;
  padding-bottom: 12px; border-bottom: 1px solid var(--line);
}
.team__group:first-of-type { margin-top: 0; }
.people {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px;
}
.person { text-align: center; }
.person__photo {
  display: block; width: clamp(120px, 14vw, 168px); aspect-ratio: 1;
  margin: 0 auto 16px; border-radius: 50%;
  overflow: hidden; border: 3px solid var(--surface);
  box-shadow: 0 0 0 1px var(--line), var(--shadow);
  transition: transform .4s var(--ease), box-shadow .4s;
}
.people--lg .person__photo { width: clamp(140px, 16vw, 196px); }
.person__photo img { width: 100%; height: 100%; object-fit: cover; }
.person:hover .person__photo {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 0 0 2px var(--teal), 0 20px 40px -20px var(--teal);
}
.person__name { font-family: var(--font-head); font-weight: 700; margin: 0 0 4px; font-size: 1.02rem; }
.person__role { margin: 0; font-size: .9rem; color: var(--ink-soft); line-height: 1.45; }

/* ---------- AFFILIATIONS / FACULTY ---------- */
.affil__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.affil__card {
  display: flex; flex-direction: column;
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s, border-color .35s;
}
.affil__card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--teal); }
.affil__img {
  aspect-ratio: 16 / 9; overflow: hidden; border-bottom: 1px solid var(--line);
}
.affil__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.affil__card:hover .affil__img img { transform: scale(1.04); }
.affil__card p {
  margin: 0; padding: 24px 28px 28px;
  font-family: var(--font-head); font-weight: 600;
  font-size: 1.12rem; color: var(--ink); line-height: 1.35;
}
.affil__place {
  text-align: center; margin: 32px 0 0;
  font-family: var(--font-head); font-weight: 600;
  font-size: 1.05rem; color: var(--ink-soft); letter-spacing: .01em;
}

/* ---------- COLLABORATIONS ---------- */
.collab__grid {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.collab__card {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 28px 26px 30px;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s;
}
.collab__card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: var(--teal); }
.collab__logo {
  width: 100%; height: 120px;
  margin-bottom: 22px; padding: 18px 22px;
  background: #fff; border-radius: 16px;
  box-shadow: 0 0 0 1px var(--line);
  overflow: hidden;
}
.collab__logo img { width: 100%; height: 100%; object-fit: contain; }
.collab__card h3 {
  font-family: var(--font-head); font-weight: 700;
  font-size: 1.12rem; letter-spacing: -.01em; margin: 0 0 8px;
}
.collab__people { margin: 0 0 6px; color: var(--ink); font-weight: 500; font-size: .95rem; }
.collab__place {
  margin: 0; color: var(--teal);
  font-family: var(--font-head); font-weight: 600;
  font-size: .82rem; letter-spacing: .04em; text-transform: uppercase;
}

/* ---------- FOOTER ---------- */
.footer {
  background: var(--bg-2);
  border-top: 1px solid var(--line);
  padding: clamp(50px, 8vh, 84px) var(--pad) 40px;
  transition: background .5s var(--ease);
}
.footer__inner {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; flex-wrap: wrap; gap: 30px;
  justify-content: space-between; align-items: flex-start;
}
.footer__brand .brand__word--lg { font-size: 2rem; }
.footer__brand p { margin: 4px 0 0; color: var(--ink-soft); }
.footer__contacts { display: flex; gap: 26px; flex-wrap: wrap; }
.footer__contacts a {
  text-decoration: none; font-family: var(--font-head); font-weight: 600;
  color: var(--ink-soft); transition: color .25s;
}
.footer__contacts a:hover { color: var(--teal); }
.footer__copy {
  max-width: var(--maxw); margin: 40px auto 0;
  padding-top: 26px; border-top: 1px solid var(--line);
  font-size: .86rem; color: var(--ink-soft);
}

/* ---------- scroll reveal ---------- */
.reveal {
  opacity: 0; transform: translateY(26px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
  transition-delay: calc(var(--d, 0) * 90ms);
}
.reveal.in-view { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .scroll-cue span { animation: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .nav__links { display: none; }
  .research__grid { grid-template-columns: 1fr; }
  .tools__grid { grid-template-columns: repeat(2, 1fr); }
  .collab__grid { grid-template-columns: repeat(2, 1fr); }
  .people { grid-template-columns: repeat(2, 1fr); }
  .affil__grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .tools__grid { grid-template-columns: 1fr; }
  .collab__grid { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; }
  .affil__card { flex-direction: column; text-align: center; }
}