/* LoongForge-VLDA project page. Loaded only by vlda.html, on top of style.css.
   Everything is prefixed .vl- so it cannot leak into other pages. */

/* ---- Hero extras ---- */
.vl-authors {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .25rem 1.1rem;
  font-weight: 600;
  font-size: 1rem;
}

.vl-authors sup {
  font-size: .68em;
  font-weight: 500;
  margin-left: .1em;
  color: #6366F1;
}

.dark .vl-authors sup {
  color: #A5B4FC;
}

.vl-affil {
  margin-top: .6rem;
  font-size: .85rem;
  color: #6B7280;
}

.dark .vl-affil {
  color: #9CA3AF;
}

/* Contribution / corresponding-author marks sit on their own line under the affiliations. */
.vl-affil.vl-affil-note {
  margin-top: .2rem;
}

/* Brand icon inside a hero button. arXiv / GitHub are masks painted in their brand
   colour (see below); the Hugging Face logo is a full-colour <img>. */
.vl-ico {
  display: inline-block;
  width: 1.2em;
  height: 1.2em;
  flex: none;
}

.vl-ico-arxiv,
.vl-ico-github {
  background-color: currentColor;
  -webkit-mask: var(--ico) center / contain no-repeat;
  mask: var(--ico) center / contain no-repeat;
}

/* url() is resolved against this stylesheet, hence ../img/ */
.vl-ico-arxiv {
  --ico: url(../img/icons/arxiv.svg);
  background-color: #B31B1B;
}

.vl-ico-github {
  --ico: url(../img/icons/github.svg);
  background-color: #24292F;
}

.dark .vl-ico-arxiv {
  background-color: #F0605D;
}

.dark .vl-ico-github {
  background-color: #fff;
}

/* Anchored sections must clear the sticky navbar */
.vl-sec {
  scroll-margin-top: 5.5rem;
}

/* ---- Video ---- */
.vl-video {
  border-radius: 1.25rem;
  overflow: hidden;
  background: #0b1020;
  border: 1px solid #E9EBF5;
  box-shadow: 0 24px 60px -28px rgba(79, 70, 229, .45);
}

.dark .vl-video {
  border-color: #1f2937;
  box-shadow: none;
}

.vl-video video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  background: #000;
}

/* ---- Figures ---- */
.vl-fig {
  margin: 0;
}

.vl-fig-frame {
  display: block;
  border-radius: 1rem;
  background: #fff;
  border: 1px solid #E9EBF5;
  padding: .75rem;
  overflow: hidden;
}

.dark .vl-fig-frame {
  border-color: #1f2937;
  background: #f8fafc;
}

.vl-fig-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.vl-fig figcaption {
  margin-top: .85rem;
  font-size: .875rem;
  line-height: 1.6;
  color: #4B5563;
}

.dark .vl-fig figcaption {
  color: #9CA3AF;
}

.vl-fig figcaption a {
  white-space: nowrap;
  color: #4F46E5;
  font-weight: 600;
}

.dark .vl-fig figcaption a {
  color: #A5B4FC;
}

/* ---- Understand -> Transition -> Execute flow ---- */
.vl-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: stretch;
  gap: .75rem;
}

.vl-node {
  border-radius: 1.1rem;
  padding: 1.1rem 1.2rem;
  background: #fff;
  border: 1px solid #E9EBF5;
}

.dark .vl-node {
  background: #0f172a;
  border-color: #1f2937;
}

.vl-node b {
  display: block;
  font-size: 1.05rem;
  margin-bottom: .25rem;
}

.vl-node span {
  font-size: .85rem;
  line-height: 1.55;
  color: #4B5563;
}

.dark .vl-node span {
  color: #9CA3AF;
}

.vl-node.vl-delta {
  border-color: transparent;
  background:
    linear-gradient(#fff, #fff) padding-box,
    var(--lf-grad) border-box;
  border: 2px solid transparent;
  box-shadow: 0 16px 36px -22px rgba(124, 58, 237, .6);
}

.dark .vl-node.vl-delta {
  background:
    linear-gradient(#0f172a, #0f172a) padding-box,
    var(--lf-grad) border-box;
}

.vl-arrow {
  align-self: center;
  font-size: 1.5rem;
  color: #A5B4FC;
}

@media (max-width: 768px) {
  .vl-flow {
    grid-template-columns: 1fr;
  }

  .vl-arrow {
    transform: rotate(90deg);
    justify-self: center;
  }
}

/* ---- Numbered mechanism cards ---- */
.vl-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 9999px;
  font-weight: 800;
  color: #fff;
  background: var(--lf-grad);
  margin-bottom: .9rem;
}

.vl-abbr {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: .78rem;
  font-weight: 500;
  color: #6366F1;
  letter-spacing: .02em;
}

.dark .vl-abbr {
  color: #A5B4FC;
}

/* ---- Two-stage training ---- */
.vl-stage {
  border-radius: 1.1rem;
  padding: 1.25rem 1.4rem;
  background: #F7F8FF;
  border: 1px solid #E0E7FF;
}

.dark .vl-stage {
  background: rgba(99, 102, 241, .08);
  border-color: rgba(99, 102, 241, .25);
}

.vl-stage p b {
  color: #111827;
}

.dark .vl-stage p b {
  color: #F3F4F6;
}

.vl-stage code {
  display: block;
  margin-top: .6rem;
  padding: .55rem .75rem;
  border-radius: .6rem;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: .8rem;
  background: #fff;
  border: 1px solid #E0E7FF;
  overflow-x: auto;
}

.dark .vl-stage code {
  background: #0b1020;
  border-color: #1f2937;
}

/* ---- Result tables ---- */
.vl-tablewrap {
  overflow-x: auto;
  border-radius: 1rem;
  border: 1px solid #E9EBF5;
  background: #fff;
}

.dark .vl-tablewrap {
  border-color: #1f2937;
  background: #0f172a;
}

.vl-table {
  width: 100%;
  min-width: 36rem;
  border-collapse: collapse;
  font-size: .875rem;
  font-variant-numeric: tabular-nums;
}

.vl-table th,
.vl-table td {
  padding: .6rem .8rem;
  text-align: right;
  white-space: nowrap;
  border-bottom: 1px solid #EEF0F7;
}

.dark .vl-table th,
.dark .vl-table td {
  border-bottom-color: #1f2937;
}

/* Few-column tables sit in a half-width column: drop the wide-table floor and
   tighten the padding so they fit without a horizontal scroll. */
.vl-table.vl-compact {
  min-width: 0;
}

.vl-table.vl-compact th,
.vl-table.vl-compact td {
  padding: .6rem .55rem;
}

.vl-table th:first-child,
.vl-table td:first-child {
  text-align: left;
  position: sticky;
  left: 0;
  background: #fff;
}

.dark .vl-table td:first-child {
  background: #0f172a;
}

.vl-table thead th:first-child {
  background: #F9FAFB;
}

.dark .vl-table thead th:first-child {
  background: #111827;
}

.vl-table thead th {
  font-weight: 600;
  font-size: .78rem;
  color: #6B7280;
  background: #F9FAFB;
}

.dark .vl-table thead th {
  color: #9CA3AF;
  background: #111827;
}

.vl-table tbody tr:last-child td {
  border-bottom: 0;
}

.vl-table tr.vl-ours td {
  font-weight: 700;
  color: #3730A3;
  background: #EEF2FF;
}

.dark .vl-table tr.vl-ours td {
  color: #E0E7FF;
  background: rgba(99, 102, 241, .18);
}

.vl-table td.vl-best {
  font-weight: 700;
}

.vl-note {
  margin-top: .75rem;
  font-size: .82rem;
  line-height: 1.6;
  color: #6B7280;
}

.dark .vl-note {
  color: #9CA3AF;
}

/* ---- Real-world bars ---- */
.vl-bar {
  display: grid;
  grid-template-columns: 6.5rem 1fr 3rem;
  align-items: center;
  gap: .6rem;
  font-size: .82rem;
  margin-top: .45rem;
}

.vl-bar>span:first-child {
  color: #6B7280;
  white-space: nowrap;
}

.dark .vl-bar>span:first-child {
  color: #9CA3AF;
}

.vl-bar>span:last-child {
  text-align: right;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.vl-bar i {
  display: block;
  height: .55rem;
  border-radius: 9999px;
  background: #CBD5E1;
}

.dark .vl-bar i {
  background: #475569;
}

.vl-bar.vl-b-ours i {
  background: var(--lf-grad);
}

.vl-bar.vl-b-ours>span {
  color: #4338CA;
  font-weight: 700;
}

.dark .vl-bar.vl-b-ours>span {
  color: #C7D2FE;
}

.vl-bar-track {
  height: .55rem;
  border-radius: 9999px;
  background: #F1F5F9;
  overflow: hidden;
}

.dark .vl-bar-track {
  background: #1e293b;
}

/* ---- Ablation tiles ---- */
.vl-abl {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

.vl-abl-num {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  font-variant-numeric: tabular-nums;
}

.vl-abl-num s {
  color: #9CA3AF;
  font-size: .95rem;
}

.vl-abl-num strong {
  font-size: 1.6rem;
  line-height: 1.1;
  color: #DC2626;
}

.dark .vl-abl-num strong {
  color: #F87171;
}

/* ---- Project hero background ---- */
.vl-head {
  background: linear-gradient(180deg, #F7F8FF 0%, #fff 100%);
  border-bottom: 1px solid #E5E7EB;
}

.dark .vl-head {
  background: linear-gradient(180deg, rgba(99, 102, 241, .08) 0%, transparent 100%);
  border-bottom-color: #1f2937;
}

/* The hero fades to white, so the first section needs less run-up than the rest. */
.vl-head+.vl-pad {
  padding-top: clamp(3rem, 5vw, 4.5rem);
}

/* Hero is centered; the sub-title and authors inherit that. */

.vl-sec {
  scroll-margin-top: 5.5rem;
}

/* ================= Editorial project-page layer ================= */
.vl-eyebrow {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #6366F1;
}

.vl-eyebrow b {
  margin-right: .6rem;
  color: #9CA3AF;
  font-weight: 500;
}

.dark .vl-eyebrow {
  color: #A5B4FC;
}

.vl-title {
  font-size: clamp(2.25rem, 8.5vw, 6rem);
  font-weight: 800;
  letter-spacing: -.045em;
  line-height: .95;
}

.vl-sub {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  line-height: 1.5;
  color: #4B5563;
  max-width: 44rem;
}

.dark .vl-sub {
  color: #D1D5DB;
}

.vl-h2 {
  font-size: clamp(1.9rem, 4.2vw, 3.1rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.025em;
  margin: .7rem 0 1.1rem;
}

.vl-h2 em {
  font-style: italic;
  background: var(--lf-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  /* Italic glyphs overhang their box, and the gradient only paints inside it:
     pad every line fragment (clone) so a wrapped line's last letter is not cut. */
  padding: 0 .14em;
  margin: 0 -.14em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.vl-lead {
  font-size: 1.075rem;
  line-height: 1.75;
  color: #4B5563;
  max-width: 46rem;
}

.dark .vl-lead {
  color: #9CA3AF;
}

.vl-lead+.vl-lead {
  margin-top: 1rem;
}

.vl-lead b {
  color: #111827;
}

.dark .vl-lead b {
  color: #F3F4F6;
}

.vl-pad {
  padding-top: clamp(4rem, 8vw, 6.5rem);
  padding-bottom: clamp(4rem, 8vw, 6.5rem);
}

.vl-tint {
  background: #F7F8FF;
  border-top: 1px solid rgba(199, 210, 254, .5);
  border-bottom: 1px solid rgba(199, 210, 254, .5);
}

.dark .vl-tint {
  background: rgba(17, 24, 39, .5);
  border-color: #1f2937;
}

/* ---- Headline metrics strip ---- */
.vl-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 2.5rem;
  border-top: 1px solid #E5E7EB;
}

.dark .vl-stats {
  border-top-color: #1f2937;
}

.vl-stats>div {
  padding: 1.1rem 1rem;
  border-bottom: 1px solid #E5E7EB;
}

.dark .vl-stats>div {
  border-bottom-color: #1f2937;
}

.vl-stats strong {
  display: inline-block;
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: #4338CA;
}

.dark .vl-stats strong {
  color: #C7D2FE;
}

.vl-stats span {
  display: block;
  margin-top: .15rem;
  font-size: .8rem;
  color: #6B7280;
}

.dark .vl-stats span {
  color: #9CA3AF;
}

@media (max-width: 768px) {
  .vl-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---- Big-number result callout ---- */
.vl-big {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: .4rem 1rem;
}

.vl-big strong {
  font-size: clamp(3rem, 7vw, 4.75rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.04em;
  font-variant-numeric: tabular-nums;
  background: var(--lf-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.vl-big span {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #6B7280;
}

.dark .vl-big span {
  color: #9CA3AF;
}

.vl-meta {
  margin: .5rem 0 1.25rem;
  font-size: .82rem;
  color: #9CA3AF;
}

/* ---- Numbered steps ---- */
.vl-step {
  padding-top: 1.1rem;
  border-top: 2px solid #C7D2FE;
}

.dark .vl-step {
  border-top-color: rgba(129, 140, 248, .4);
}

.vl-step h3 {
  margin: .35rem 0 .5rem;
  font-size: 1.25rem;
  font-weight: 700;
}

/* ---- Real-world score cards ---- */
.vl-score {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  margin-bottom: .75rem;
}

.vl-score strong {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.03em;
  color: #4338CA;
}

.dark .vl-score strong {
  color: #C7D2FE;
}

.vl-score span {
  font-size: .8rem;
  color: #9CA3AF;
}

/* ---- Figure lightbox ---- */
.vl-open {
  display: inline-block;
  margin-top: .6rem;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  font: inherit;
  font-size: .85rem;
  font-weight: 600;
  color: #4F46E5;
}

.vl-open:hover {
  text-decoration: underline;
}

.dark .vl-open {
  color: #A5B4FC;
}

.vl-lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(3, 7, 18, .86);
}

.vl-lightbox.open {
  display: flex;
}

.vl-lightbox img {
  max-width: 100%;
  max-height: 100%;
  border-radius: .75rem;
  background: #fff;
}

.vl-lightbox button {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  padding: .4rem .9rem;
  border: 0;
  border-radius: 9999px;
  cursor: pointer;
  font-weight: 600;
  color: #111827;
  background: #fff;
}

/* ---- Section intro / panel head: stacked (title, then text) ---- */
.vl-intro {
  margin-bottom: 2.5rem;
}

.vl-intro .vl-h2 {
  margin-bottom: 1.1rem;
}

.vl-split {
  margin-bottom: 1.5rem;
}

.vl-split>div+div {
  margin-top: 1rem;
}

.vl-intro .vl-lead,
.vl-split .vl-lead {
  max-width: none;
}

.vl-split h3 {
  margin-bottom: 0;
}

.vl-split>h3+.vl-lead {
  margin-top: .5rem;
}

/* ---- Footer strip ---- */
.vl-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem 1.5rem;
  font-size: .85rem;
  color: #6B7280;
}

/* Clone command beside the GitHub card: same height, text vertically centered. */
pre.cite-pre.vl-clone {
  display: flex;
  align-items: center;
  margin: 0;
}

pre.cite-pre.vl-clone>code {
  flex: 1;
  min-width: 0;
}