/* =========================================================================
   IMCS Lab — modern tech / dark accent
   Deliberately animation-free: no transitions, no transforms, no keyframes.
   ========================================================================= */

:root {
  --ink:        #0a1020;  /* darkest — header, hero */
  --ink-2:      #111a2e;  /* dark surface */
  --ink-3:      #1c2841;  /* dark border */
  --slate:      #4a5568;  /* secondary text */
  --slate-2:    #6b7688;  /* tertiary text */
  --line:       #e3e7ee;  /* light border */
  --surface:    #f5f7fa;  /* light fill */
  --bg:         #ffffff;
  --text:       #17202f;
  --accent:     #3d7dff;  /* primary accent */
  --accent-dk:  #2560db;  /* accent on light bg (AA contrast) */
  --accent-lt:  #7aa9ff;  /* accent on dark bg */

  --wrap: 1120px;
  --gutter: 40px;   /* horizontal breathing room; narrowed on small screens */
  --radius: 10px;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
               "Apple SD Gothic Neo", "Malgun Gothic", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--accent-dk); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5em; font-weight: 650; letter-spacing: -0.015em; }

/* `.wrap` is often combined with another class on the same element (e.g.
   `class="wrap page-body"`). Those classes must only ever set padding-block —
   a `padding` shorthand there would silently reset this inline padding to 0. */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 12px; top: 12px; z-index: 100;
  background: #fff; color: var(--ink);
  padding: 10px 16px; border-radius: 6px;
}

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- Header ------------------------------------------------------ */

.site-header {
  background: var(--ink);
  border-bottom: 1px solid var(--ink-3);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 74px;
}

/* min-width:0 lets the long lab name shrink instead of pushing the nav toggle
   onto its own row on narrow screens. */
.brand { display: flex; align-items: center; gap: 12px; color: #fff; min-width: 0; }
.brand:hover { text-decoration: none; }

.brand__mark {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: #fff;
  background: var(--accent);
  border-radius: 6px;
  padding: 6px 9px;
  line-height: 1;
  flex: none;
}

.brand__text { display: flex; flex-direction: column; min-width: 0; }
.brand__name { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.brand__org  { font-size: 12px; color: #93a1bb; letter-spacing: .02em; }

/* ---------- Navigation -------------------------------------------------- */

.nav-toggle { display: none; }

.site-nav__list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
}

.site-nav__item { position: relative; }

.site-nav__link {
  display: block;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 500;
  color: #c3cddf;
  border-radius: 6px;
}
.site-nav__link:hover { color: #fff; background: var(--ink-2); text-decoration: none; }
.site-nav__link.is-current { color: #fff; box-shadow: inset 0 -2px 0 var(--accent); border-radius: 6px 6px 0 0; }

/* Desktop dropdown — shown on hover and on keyboard focus. */
.site-nav__sub {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 170px;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--ink-2);
  border: 1px solid var(--ink-3);
  border-radius: 8px;
  box-shadow: 0 12px 28px rgba(4, 9, 20, .4);
  display: none;
  z-index: 30;
}
.site-nav__item.has-children:hover > .site-nav__sub,
.site-nav__item.has-children:focus-within > .site-nav__sub { display: block; }

.site-nav__sublink {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: #c3cddf;
  border-radius: 5px;
}
.site-nav__sublink:hover { color: #fff; background: var(--ink-3); text-decoration: none; }
.site-nav__sublink.is-current { color: var(--accent-lt); }

/* ---------- Hero (home) ------------------------------------------------- */

.hero {
  background: var(--ink);
  color: #fff;
  padding: 84px 0 92px;
  border-bottom: 1px solid var(--ink-3);
}

.hero__eyebrow {
  margin: 0 0 18px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent-lt);
}

.hero__title {
  margin: 0 0 20px;
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 680;
  letter-spacing: -0.03em;
  line-height: 1.12;
  max-width: 18ch;
}

.hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.7;
  color: #b8c4d8;
}

.hero__actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
}
.btn:hover { text-decoration: none; }
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: #5a90ff; }
.btn--ghost { border-color: #33405c; color: #dbe3f0; }
.btn--ghost:hover { border-color: #55658a; background: var(--ink-2); }

/* ---------- Page head (inner pages) ------------------------------------- */

.page-head {
  background: var(--ink);
  color: #fff;
  padding: 52px 0 56px;
  border-bottom: 1px solid var(--ink-3);
}

.page-head__eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent-lt);
}

.page-head__title {
  margin: 0;
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 660;
  letter-spacing: -0.025em;
}

.page-head__subtitle {
  margin: 14px 0 0;
  max-width: 68ch;
  color: #b8c4d8;
  font-size: 16px;
}

.page-body { padding-block: 56px 80px; }

/* ---------- Sections ---------------------------------------------------- */

.section { padding: 72px 0; }
.section--alt { background: var(--surface); border-block: 1px solid var(--line); }

.section__title {
  margin: 0 0 8px;
  font-size: clamp(21px, 2.4vw, 27px);
  letter-spacing: -0.02em;
}

.section__intro {
  margin: 0 0 36px;
  color: var(--slate);
  max-width: 68ch;
}

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.section__head .section__title { margin: 0; }

.link-more { font-size: 14px; font-weight: 600; }
.link-more::after { content: " \2192"; }

.rule {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 48px 0;
}

/* ---------- Cards / grids ----------------------------------------------- */

.grid { display: grid; gap: 20px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.section--alt .card { background: #fff; }

.card__kicker {
  margin: 0 0 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent-dk);
}

.card__title { margin: 0 0 12px; font-size: 18px; }
.card__text { margin: 0; color: var(--slate); font-size: 15px; }

.card__list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.card__list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
  color: var(--slate);
  font-size: 15px;
}
.card__list li::before {
  content: "";
  position: absolute;
  left: 0; top: .62em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.card__list li:last-child { margin-bottom: 0; }

/* ---------- News -------------------------------------------------------- */

.news-list { list-style: none; margin: 0; padding: 0; }

.news-item {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}
.news-item:first-child { padding-top: 0; }

.news-item__date {
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--slate-2);
  padding-top: 3px;
}

.news-item__tag {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent-dk);
  background: #eef3ff;
  border-radius: 4px;
  padding: 3px 8px;
}

.news-item__title { margin: 0 0 8px; font-size: 17px; }
.news-item__body { margin: 0; color: var(--slate); font-size: 15px; }
.news-item__body :first-child { margin-top: 0; }
.news-item__body :last-child { margin-bottom: 0; }
.news-item__body ul { margin: 10px 0 0; padding-left: 18px; }

/* ---------- Publications ------------------------------------------------ */

.pub-year {
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
  font-size: 20px;
}
.pub-year:first-of-type { margin-top: 0; }

.pub-list { list-style: none; margin: 0; padding: 0; }

.pub-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: start;
}

.pub-item__title { margin: 0 0 6px; font-size: 16px; font-weight: 600; }
.pub-item__meta { margin: 0; font-size: 14px; color: var(--slate); }
.pub-item__venue { font-style: italic; }
.pub-item__date { font-size: 13px; color: var(--slate-2); white-space: nowrap; padding-top: 2px; }

.pub-item__badge {
  display: inline-block;
  margin-left: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: #0d6b4f;
  background: #e3f6ee;
  border-radius: 4px;
  padding: 2px 7px;
  vertical-align: 2px;
}

/* ---------- Profile (professor) ----------------------------------------- */

.profile {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 44px;
  align-items: start;
}

.profile__aside {
  position: sticky;
  top: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--surface);
}

.profile__name { margin: 0 0 4px; font-size: 20px; }
.profile__role { margin: 0 0 18px; font-size: 14px; color: var(--slate); }

.profile__meta { margin: 0; font-size: 14px; }
.profile__meta dt {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--slate-2);
  margin-top: 14px;
}
.profile__meta dd { margin: 3px 0 0; color: var(--text); word-break: break-word; }

/* ---------- Entry (timeline-ish CV blocks) ------------------------------ */

.entry {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.entry:last-child { border-bottom: 0; }

.entry__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}

.entry__title { margin: 0; font-size: 17px; }
.entry__period {
  font-size: 13px;
  color: var(--slate-2);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.entry__org { margin: 3px 0 0; font-size: 14px; color: var(--accent-dk); font-weight: 500; }
.entry__note { margin: 10px 0 0; font-size: 14px; color: var(--slate); }

.entry__points { margin: 10px 0 0; padding-left: 18px; color: var(--slate); font-size: 14px; }
.entry__points li { margin-bottom: 5px; }

/* ---------- Tag list ---------------------------------------------------- */

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.tags li {
  font-size: 13px;
  color: var(--slate);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 12px;
}

/* ---------- Definition-style activity list ------------------------------ */

.deflist { margin: 0; }
.deflist dt {
  font-weight: 650;
  font-size: 15px;
  margin-top: 20px;
}
.deflist dt:first-child { margin-top: 0; }
.deflist dd { margin: 4px 0 0; color: var(--slate); font-size: 14.5px; }

/* ---------- Figures ----------------------------------------------------- */

.figure { margin: 24px 0 0; }
.figure img {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
.figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--slate-2);
}

/* ---------- Members / empty state --------------------------------------- */

.member-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

.member-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.member-card__name { margin: 0 0 2px; font-size: 17px; }
.member-card__role { margin: 0 0 12px; font-size: 13px; color: var(--accent-dk); font-weight: 600; }
.member-card__topic { margin: 0; font-size: 14px; color: var(--slate); }

.empty-state {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 40px 28px;
  text-align: center;
  color: var(--slate);
}
.empty-state h2 { margin: 0 0 8px; font-size: 18px; color: var(--text); }
.empty-state p { margin: 0; font-size: 15px; }

/* ---------- Callout ----------------------------------------------------- */

.callout {
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--surface);
  padding: 24px 26px;
}
.callout h2 { margin: 0 0 10px; font-size: 18px; }
.callout p { margin: 0 0 10px; color: var(--slate); font-size: 15px; }
.callout p:last-child { margin-bottom: 0; }
.callout ul { margin: 0 0 12px; padding-left: 18px; color: var(--slate); font-size: 15px; }

/* ---------- Contact strip ----------------------------------------------- */

.contact-strip { background: var(--ink); color: #fff; padding: 60px 0; }
.contact-strip .section__title { color: #fff; }
.contact-strip__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 28px; }
.contact-strip__label {
  margin: 0 0 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent-lt);
}
.contact-strip__value { margin: 0; color: #c3cddf; font-size: 14.5px; }
.contact-strip__value a { color: #fff; }

/* ---------- Footer ------------------------------------------------------ */

.site-footer {
  background: var(--ink-2);
  color: #9fadc4;
  border-top: 1px solid var(--ink-3);
  padding: 52px 0 0;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1.4fr 1fr;
  gap: 32px;
  padding-bottom: 40px;
}

.site-footer__title {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #fff;
}
.site-footer__desc { margin: 0; font-size: 14px; line-height: 1.7; }
.site-footer a { color: #c3cddf; }
.site-footer a:hover { color: #fff; }

.site-footer__links { list-style: none; margin: 0; padding: 0; font-size: 14px; }
.site-footer__links li { margin-bottom: 7px; }

.site-footer__bottom {
  border-top: 1px solid var(--ink-3);
  padding-top: 20px;
  padding-bottom: 24px;
}
.site-footer__bottom p { margin: 0; font-size: 13px; color: #6d7c95; }

/* =========================================================================
   Responsive
   ========================================================================= */

@media (max-width: 1000px) {
  :root { --gutter: 28px; }

  .profile { grid-template-columns: 1fr; gap: 28px; }
  .profile__aside { position: static; }
  .grid--3, .member-grid, .contact-strip__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .site-header__inner { min-height: 64px; flex-wrap: wrap; gap: 12px; padding-block: 10px; }

  /* flex-basis 0 keeps the brand on the same row as the toggle: with
     flex-wrap:wrap a long max-content name would push the toggle down instead
     of shrinking. The name wraps to two lines rather than being truncated. */
  .brand { flex: 1 1 0; }
  .brand__name { white-space: normal; }

  /* The nav panel always claims its own row below brand + toggle. */
  .site-nav { flex: 1 0 100%; }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    padding: 0 9px;
    background: none;
    border: 1px solid var(--ink-3);
    border-radius: 7px;
    cursor: pointer;
  }
  .nav-toggle__bar { display: block; height: 2px; width: 100%; background: #dbe3f0; border-radius: 2px; }

  .site-nav { display: none; width: 100%; }
  .site-nav.is-open { display: block; }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 16px;
    border-top: 1px solid var(--ink-3);
  }

  .site-nav__link { padding: 12px 4px; font-size: 15px; border-radius: 0; }
  .site-nav__link:hover { background: none; }
  .site-nav__link.is-current { box-shadow: none; color: var(--accent-lt); }

  /* Dropdown becomes a always-visible indented group. */
  .site-nav__sub {
    display: block;
    position: static;
    min-width: 0;
    margin: 0 0 4px 14px;
    padding: 0;
    background: none;
    border: 0;
    border-left: 1px solid var(--ink-3);
    border-radius: 0;
    box-shadow: none;
  }
  .site-nav__sublink { padding: 9px 14px; }
}

@media (max-width: 720px) {
  :root { --gutter: 20px; }

  .hero { padding: 56px 0 60px; }
  .page-head { padding: 40px 0 42px; }
  .page-body { padding-block: 40px 60px; }
  .section { padding: 52px 0; }

  .grid--2, .grid--3, .member-grid, .contact-strip__grid,
  .site-footer__inner { grid-template-columns: 1fr; }
  .site-footer__inner { gap: 28px; }

  .news-item { grid-template-columns: 1fr; gap: 8px; }
  .news-item__date { padding-top: 0; }

  .pub-item { grid-template-columns: 1fr; gap: 6px; }
  .pub-item__date { padding-top: 0; }

  .brand__name { font-size: 13.5px; max-width: 30ch; }
  .brand__org { font-size: 11px; }

  .hero__actions .btn { flex: 1 1 auto; text-align: center; }
}

@media (max-width: 400px) {
  .brand__mark { padding: 5px 7px; font-size: 11px; }
  .brand__name { font-size: 12.5px; }
}

@media print {
  .site-header, .site-footer, .nav-toggle { display: none; }
  .page-head { background: none; color: #000; border-bottom: 2px solid #000; }
  .page-head__title, .page-head__subtitle { color: #000; }
}