/* ==========================================================================
   NAP Lab — live feeds, open problems, Events & Publications polish
   Loaded after css/main.css; uses its tokens (--plasma maroon, --fusion orange,
   --ink, --paper, --line, --display, --mono). Square-ish corners, no gradients.
   ========================================================================== */

.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------- shared: filter chips, status line ---------- */
.lf-toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px;
  margin-bottom: 1.25rem;
}
.lf-filters { display: flex; flex-wrap: wrap; gap: 8px; }
.lf-filters button {
  font-family: var(--navfont); font-size: 12.5px; font-weight: 700; letter-spacing: .03em;
  padding: 7px 14px; border: 1px solid var(--line-2); background: var(--white);
  color: var(--ink-2); cursor: pointer; border-radius: 999px;
  transition: background .15s, color .15s, border-color .15s;
}
.lf-filters button:hover { border-color: var(--ink); color: var(--ink); }
.lf-filters button[aria-pressed="true"] {
  background: var(--plasma); border-color: var(--plasma); color: var(--white);
}
.lf-filters button:focus-visible, .lf-tabs button:focus-visible, .lf-search input:focus-visible,
.pubs-search input:focus-visible {
  outline: 2px solid var(--fusion); outline-offset: 2px;
}
.lf-status { font-size: 12.5px; color: var(--ink-3); margin: 0; flex: 1 1 260px; }
.lf-empty { font-size: 15px; color: var(--ink-3); padding: 16px 0; }
.lf-empty a { color: var(--link); }
.lf-search { flex: 0 1 280px; }
.lf-search input, .pubs-search input {
  width: 100%; font: inherit; font-size: 14px; padding: 8px 14px;
  border: 1px solid var(--line-2); background: var(--white); color: var(--ink);
  border-radius: 999px;
}

/* ---------- chips ---------- */
.lf-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.lf-chip {
  font-family: var(--mono); font-size: 10.5px; font-weight: 600; letter-spacing: .06em;
  text-transform: uppercase; padding: 3px 9px; border-radius: 999px;
  background: var(--paper-2); color: var(--ink-3); border: 1px solid var(--line);
}
.lf-chip-when { color: var(--ink-2); }
.lf-chip-live { background: var(--ok-bg); color: var(--ok); border-color: transparent; }
.lf-chip-src { background: transparent; }
.lf-t-school { background: var(--fusion-glow); color: var(--fusion-deep); border-color: rgba(248,136,38,.35); }
.lf-t-workshop { background: var(--plasma-glow); color: var(--plasma-deep); border-color: rgba(179,29,15,.25); }
.lf-t-conference { background: var(--paper-3); color: var(--ink-2); }
.lf-lvl-phd { background: var(--ink); color: var(--white); border-color: var(--ink); }
.lf-lvl-postdoc { background: var(--plasma); color: var(--white); border-color: var(--plasma); }
.lf-chip-core { background: var(--fusion-glow); color: var(--fusion-deep); border-color: rgba(248,136,38,.35); }

/* ---------- conference list ---------- */
.lf-conf-list { display: flex; flex-direction: column; gap: 12px; }
.lf-month {
  font-family: var(--display); font-size: 1.05rem; font-weight: 700; color: var(--plasma);
  margin: 1.4rem 0 .1rem; padding-bottom: .4rem; border-bottom: 2px solid var(--plasma);
  letter-spacing: .01em;
}
.lf-month:first-child { margin-top: 0; }
.lf-conf {
  display: grid; grid-template-columns: 76px 1fr; gap: 18px; align-items: start;
  background: var(--white); border: 1px solid var(--line); padding: 16px 18px;
  transition: border-color .15s, box-shadow .15s;
}
.lf-conf:hover { border-color: var(--line-2); box-shadow: var(--sh); }
.lf-date {
  background: var(--ink); color: var(--white); text-align: center;
  padding: 8px 6px 7px; line-height: 1;
}
.lf-date .lf-m { display: block; font-size: 10.5px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--fusion); }
.lf-date .lf-d { display: block; font-family: var(--display); font-size: 28px; font-weight: 700; margin: 5px 0 3px; }
.lf-date .lf-y { display: block; font-family: var(--mono); font-size: 10.5px; color: var(--on-dark-3); }
.lf-conf h3 { font-family: var(--display); font-size: 1.12rem; font-weight: 700; line-height: 1.3; margin: 0 0 6px; }
.lf-conf h3 a { color: var(--ink); }
.lf-conf h3 a:hover { color: var(--plasma); }
.lf-meta { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 14px; color: var(--ink-3); margin: 0; }
.lf-meta span:first-child { font-family: var(--mono); font-size: 12.5px; color: var(--ink-2); }

/* ---------- positions ---------- */
.lf-job-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 14px; }
.lf-job {
  background: var(--white); border: 1px solid var(--line); border-top: 3px solid var(--ink);
  padding: 18px 20px; display: flex; flex-direction: column;
}
.lf-job[data-level="postdoc"] { border-top-color: var(--plasma); }
.lf-job h3 { font-family: var(--display); font-size: 1.08rem; font-weight: 700; line-height: 1.3; margin: 0 0 6px; }
.lf-job h3 a { color: var(--ink); }
.lf-job h3 a:hover { color: var(--plasma); }
.lf-org { font-size: 14.5px; color: var(--ink-2); margin: 0 0 8px; font-weight: 700; }
.lf-topics { font-size: 14px; color: var(--ink-3); line-height: 1.55; margin: 0 0 12px; }
.lf-job-foot {
  margin-top: auto; padding-top: 12px; border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px;
}
.lf-deadline { font-family: var(--mono); font-size: 12px; color: var(--ink-2); }
.lf-deadline.lf-soon { color: var(--plasma); font-weight: 700; }
.lf-start { font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
.lf-go { margin-left: auto; font-size: 13.5px; font-weight: 700; color: var(--link); }
.lf-go:hover { text-decoration: underline; }

/* ---------- journal tabs ---------- */
.lf-tabs { display: flex; flex-wrap: wrap; gap: 0; margin-bottom: 1.4rem; border-bottom: 1px solid var(--line-2); }
.lf-tabs button {
  font-family: var(--navfont); font-size: 13.5px; font-weight: 700; letter-spacing: .02em;
  background: none; border: 0; border-bottom: 3px solid transparent; margin-bottom: -1px;
  padding: 10px 18px; color: var(--ink-3); cursor: pointer;
}
.lf-tabs button small { font-weight: 400; color: var(--ink-3); margin-left: 4px; }
.lf-tabs button:hover { color: var(--ink); }
.lf-tabs button[aria-selected="true"] { color: var(--plasma); border-bottom-color: var(--plasma); }
[data-pane][hidden] { display: none !important; }

/* ---------- open problems ---------- */
.op-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 18px; }
.op-card {
  background: var(--white); border: 1px solid var(--line); border-left: 4px solid var(--plasma);
  padding: 22px 24px 20px; display: flex; flex-direction: column;
}
.op-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; }
.op-num { font-family: var(--display); font-size: 1.9rem; font-weight: 700; color: var(--plasma); line-height: 1; }
.op-area { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.op-horizon {
  margin-left: auto; font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  color: var(--fusion-deep); background: var(--fusion-glow); padding: 3px 9px; border-radius: 999px;
}
.op-card h3 { font-family: var(--display); font-size: 1.25rem; font-weight: 700; line-height: 1.28; color: var(--ink); margin: 0 0 10px; }
.op-why { font-size: 15.5px; line-height: 1.65; color: var(--ink-2); margin: 0 0 12px; }
.op-step { font-size: 15px; line-height: 1.6; color: var(--ink); margin: 0 0 14px; padding: 10px 12px; background: var(--paper-2); }
.op-step strong { color: var(--plasma); }
.op-tools { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: auto 0 0; padding: 0; }
.op-tools li {
  font-family: var(--mono); font-size: 11.5px; padding: 3px 10px;
  border: 1px solid var(--line-2); border-radius: 999px; color: var(--ink-2);
}
.op-cta { margin-top: 2rem; display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.op-cta p { font-size: 15px; color: var(--ink-2); margin: 0; max-width: 60ch; }

/* ---------- home sections ---------- */
.lf-section-cta { margin-top: 1.75rem; display: flex; gap: 12px; flex-wrap: wrap; }
.lf-note { font-size: 13px; color: var(--ink-3); margin-top: 1rem; max-width: 70ch; }

/* ==========================================================================
   EVENTS page
   ========================================================================== */
.ev-hero-stats { display: flex; flex-wrap: wrap; gap: 28px; margin-top: 22px; }
.ev-hero-stats div { border-left: 3px solid var(--fusion); padding-left: 12px; }
.ev-hero-stats b { display: block; font-family: var(--display); font-size: 1.7rem; color: var(--ink); line-height: 1.1; }
.ev-hero-stats span { font-size: 12.5px; color: var(--ink-3); letter-spacing: .04em; text-transform: uppercase; }

.ev-sources { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin-top: 1.25rem; }
.ev-source {
  display: block; background: var(--white); border: 1px solid var(--line); padding: 16px 18px;
  transition: border-color .15s, transform .15s;
}
.ev-source:hover { border-color: var(--plasma); transform: translateY(-2px); }
.ev-source b { display: block; font-family: var(--display); font-size: 1.02rem; color: var(--plasma); margin-bottom: 4px; }
.ev-source span { font-size: 13.5px; color: var(--ink-3); line-height: 1.5; }

.ev-timeline { position: relative; margin: 1rem 0 0; padding-left: 28px; border-left: 2px solid var(--line-2); }
.ev-tl-item { position: relative; padding: 0 0 22px; }
.ev-tl-item::before {
  content: ""; position: absolute; left: -35px; top: 5px; width: 12px; height: 12px;
  background: var(--white); border: 3px solid var(--plasma); border-radius: 50%;
}
.ev-tl-date { font-family: var(--mono); font-size: 12.5px; color: var(--ink-3); letter-spacing: .02em; }
.ev-tl-item p { font-size: 16.5px; line-height: 1.6; color: var(--ink-2); margin: 3px 0 0; max-width: 70ch; }

.ev-archive { margin-top: 2.5rem; border: 1px solid var(--line); background: var(--white); }
.ev-archive summary {
  cursor: pointer; padding: 14px 18px; font-family: var(--display); font-weight: 700;
  color: var(--ink); list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.ev-archive summary::-webkit-details-marker { display: none; }
.ev-archive summary::after { content: "+"; font-size: 1.4rem; color: var(--plasma); }
.ev-archive[open] summary::after { content: "–"; }
.ev-archive ul { list-style: none; margin: 0; padding: 0 18px 10px; }
.ev-archive li { display: grid; grid-template-columns: 150px 1fr; gap: 14px; padding: 10px 0; border-top: 1px solid var(--line); font-size: 15px; }
.ev-archive li span { font-family: var(--mono); font-size: 12.5px; color: var(--ink-3); padding-top: 2px; }
.ev-archive li a { color: var(--ink); font-weight: 700; }
.ev-archive li a:hover { color: var(--plasma); }

/* ==========================================================================
   PUBLICATIONS page
   ========================================================================== */
.pubs-stats { display: flex; flex-wrap: wrap; gap: 28px; margin: 22px 0 4px; }
.pubs-stats div { border-left: 3px solid var(--plasma); padding-left: 12px; }
.pubs-stats b { display: block; font-family: var(--display); font-size: 1.8rem; color: var(--ink); line-height: 1.1; }
.pubs-stats span { font-size: 12.5px; color: var(--ink-3); letter-spacing: .04em; text-transform: uppercase; }
.pubs-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

.pubs-toolbar {
  position: sticky; top: calc(var(--nav-h, 56px) - 4px); z-index: 20;
  background: var(--paper); border-bottom: 1px solid var(--line);
  margin: 0 calc(var(--pad) * -1) 1.5rem; padding: 12px var(--pad);
  display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center;
}
.pubs-search { flex: 0 1 300px; }
.pubs-count { font-size: 13px; color: var(--ink-3); margin-left: auto; font-family: var(--mono); }
.pubs-filters { display: flex; flex-wrap: wrap; gap: 8px; }
.pubs-filters button {
  font-family: var(--navfont); font-size: 12.5px; font-weight: 700; padding: 6px 13px;
  border: 1px solid var(--line-2); background: var(--white); color: var(--ink-2);
  cursor: pointer; border-radius: 999px;
}
.pubs-filters button i { font-style: normal; font-weight: 400; color: var(--ink-3); margin-left: 5px; }
.pubs-filters button:hover { border-color: var(--ink); }
.pubs-filters button[aria-pressed="true"] { background: var(--plasma); border-color: var(--plasma); color: var(--white); }
.pubs-filters button[aria-pressed="true"] i { color: rgba(255,255,255,.8); }
.pubs-filters button:focus-visible { outline: 2px solid var(--fusion); outline-offset: 2px; }

.pub-year-head {
  display: flex; align-items: baseline; gap: 14px; margin: 2.2rem 0 .4rem;
  font-family: var(--display); font-size: 2rem; font-weight: 700; color: var(--plasma); line-height: 1;
}
.pub-year-head:first-child { margin-top: 0; }
.pub-year-head small { font-family: var(--mono); font-size: 12px; font-weight: 400; color: var(--ink-3); letter-spacing: .04em; }
.pub-year-head::after { content: ""; flex: 1; border-top: 1px solid var(--line-2); align-self: center; }

.pub-list .pub-item {
  grid-template-columns: 1fr; gap: 0; padding: 20px 22px; margin: 10px 0;
  background: var(--white); border: 1px solid var(--line); border-left: 4px solid var(--line-2);
  transition: border-color .15s, box-shadow .15s;
}
.pub-list .pub-item:first-child { border-top: 1px solid var(--line); }
.pub-list .pub-item:hover { border-left-color: var(--plasma); box-shadow: var(--sh); }
.pub-list .pub-item.highlight-pub { border-left-color: var(--fusion); }
.pub-list .pub-item .pub-year { display: none; }
.pub-list .pub-info h4 { font-weight: 700; font-size: 1.12rem; max-width: none; margin-bottom: 6px; }
.pub-list .pub-info .pub-authors { margin-bottom: 12px; max-width: none; }
.pub-list .pub-info .pub-links { align-items: center; }
.pub-star { color: var(--fusion-deep); font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; margin-right: 4px; }
.pub-tag {
  font-size: 11px; padding: 2px 9px; border-radius: 999px; background: var(--paper-2);
  border: 1px solid var(--line); color: var(--ink-3); margin-left: auto;
}
.pub-tag + .pub-tag { margin-left: 0; }
.pub-empty { padding: 2rem 0; color: var(--ink-3); }
.pubs-note { margin-top: 2rem; padding: 18px 22px; background: var(--paper-2); border-left: 4px solid var(--fusion); font-size: 14.5px; color: var(--ink-2); }
.pubs-note a { color: var(--link); }

@media (max-width: 640px) {
  .lf-conf { grid-template-columns: 60px 1fr; gap: 12px; padding: 14px; }
  .lf-date .lf-d { font-size: 22px; }
  .lf-job-list { grid-template-columns: 1fr; }
  .op-grid { grid-template-columns: 1fr; }
  .ev-archive li { grid-template-columns: 1fr; gap: 2px; }
  .pubs-toolbar { position: static; }
  .pub-tag { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .ev-source, .lf-conf, .pub-list .pub-item { transition: none; }
  .ev-source:hover { transform: none; }
}

/* [hidden] must win over display:grid / flex set above */
.pub-list .pub-item[hidden], .pub-year-head[hidden], .pub-empty[hidden] { display: none !important; }

/* ==========================================================================
   Teaching page (tch-*)
   ========================================================================== */
.tch-jump { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.tch-jump a {
  font-family: var(--navfont); font-size: 12.5px; font-weight: 700; letter-spacing: .03em;
  padding: 6px 14px; border: 1px solid var(--line-2); background: rgba(255,255,255,.9);
  color: var(--ink-2); border-radius: 999px; transition: border-color .15s, color .15s;
}
.tch-jump a:hover { border-color: var(--plasma); color: var(--plasma); }

.tch-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); gap: 18px; }
.tch-card {
  display: flex; flex-direction: column; background: var(--white);
  border: 1px solid var(--line); border-top: 3px solid var(--line-2); padding: 20px 22px 18px;
  transition: border-color .15s, box-shadow .15s, transform .15s;
}
.tch-card:hover { border-top-color: var(--fusion); box-shadow: 0 8px 22px rgba(35,35,35,.08); transform: translateY(-2px); }
.tch-card[hidden] { display: none; }
.tch-card-feature { grid-column: 1 / -1; border-top-color: var(--plasma); background: var(--paper-2); }
.tch-card-top { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 10px; }
.tch-card h3 { font-family: var(--display); font-size: 1.3rem; font-weight: 700; color: var(--ink); margin: 0 0 8px; }
.tch-card p { font-size: 16px; line-height: 1.65; color: var(--ink); margin: 0 0 12px; max-width: 72ch; }
.tch-chip {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .02em; color: var(--ink-2);
  border: 1px solid var(--line-2); padding: 2px 9px; border-radius: 999px; background: var(--white);
}
.tch-chip-sem { color: var(--fusion-deep); border-color: var(--fusion); background: var(--fusion-glow); }
.tch-topics { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: auto 0 0; padding: 0; }
.tch-topics li { font-size: 12.5px; padding: 3px 10px; background: var(--paper-3); color: var(--ink-2); border-radius: 999px; }
.tch-links { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; margin-top: 16px; font-size: 14px; }
.tch-links a:not(.btn) { color: var(--link); font-weight: 700; }
.tch-links a:not(.btn):hover { color: var(--link-hover); }

.tch-talks { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.tch-talks li { display: grid; grid-template-columns: 76px 1fr; gap: 6px 20px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.tch-year { font-family: var(--mono); font-size: 14px; color: var(--ink-3); padding-top: 3px; }
.tch-kind {
  display: inline-block; font-family: var(--navfont); font-size: 11.5px; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--plasma); margin-bottom: 4px;
}
.tch-talks p { font-size: 16.5px; line-height: 1.6; color: var(--ink); margin: 0; max-width: 74ch; }

.tch-people { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); gap: 16px; }
.tch-person { display: block; background: var(--white); border: 1px solid var(--line); border-left: 3px solid var(--plasma); padding: 16px 18px; }
.tch-person h4 { font-family: var(--display); font-size: 1.1rem; font-weight: 700; color: var(--ink); margin: 8px 0 4px; }
.tch-person p { font-size: 15.5px; line-height: 1.6; color: var(--ink); margin: 0; }
.tch-person-cta { border-left-color: var(--fusion); background: var(--paper-2); transition: border-color .15s, transform .15s; }
.tch-person-cta:hover { border-color: var(--fusion); transform: translateY(-2px); }

@media (max-width: 560px) {
  .tch-talks li { grid-template-columns: 1fr; }
  .tch-card-feature { grid-column: auto; }
}