/* ================= Engineering project pages ================= */

.proj-page main { padding-bottom: var(--s-8); }

/* ---- hero ---- */
.proj-hero {
  padding-top: clamp(120px, 16vh, 180px);
  padding-bottom: clamp(var(--s-4), 5vw, var(--s-6));
  border-bottom: 1px solid var(--rule-light);
}
.proj-back {
  display: inline-block;
  color: var(--on-light-3);
  margin-bottom: clamp(var(--s-4), 6vw, var(--s-6));
  transition: color .3s var(--ease-out), transform .3s var(--ease-out);
}
.proj-back:hover { color: var(--accent); transform: translateX(-4px); }

.proj-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-1) var(--s-4);
  color: var(--on-light-3);
  padding-bottom: var(--s-2);
}
.proj-hero__n { color: var(--accent); }

.proj-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 8.5vw, 7.5rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--ink);
}
.proj-hero__kicker {
  margin-bottom: var(--s-2);
  font-size: clamp(1rem, 1.9vw, 1.5rem);
  line-height: 1.3;
  color: var(--on-light-2);
  margin-top: var(--s-2);
  max-width: 34ch;
}

/* ---- lede + stack ---- */
.proj-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(220px, 0.7fr);
  gap: clamp(var(--s-4), 5vw, var(--s-7));
  padding-block: clamp(var(--s-5), 6vw, var(--s-7));
  border-bottom: 1px solid var(--rule-light);
}
@media (max-width: 860px) { .proj-intro { grid-template-columns: 1fr; gap: var(--s-4); } }

.proj-lede {
  font-size: clamp(1.1rem, 1.95vw, 1.55rem);
  line-height: 1.34;
  color: var(--ink);
  max-width: 46ch;
}
.proj-stack-label { color: var(--accent); display: block; margin-bottom: var(--s-2); }
.proj-stack { display: flex; flex-direction: column; gap: 6px; }
.proj-stack li {
  font-size: 14px;
  line-height: 1.5;
  color: var(--on-light-2);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule-light);
}

/* ---- numbers ---- */
.proj-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--s-3);
  padding-block: clamp(var(--s-5), 6vw, var(--s-7));
  border-bottom: 1px solid var(--rule-light);
}
.proj-stat__v {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.75rem);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.proj-stat__l { display: block; margin-top: 8px; color: var(--on-light-3); }

/* ---- body ---- */
.proj-block {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.6fr);
  gap: clamp(var(--s-3), 4vw, var(--s-6));
  padding-block: clamp(var(--s-4), 5vw, var(--s-6));
  border-bottom: 1px solid var(--rule-light);
  align-items: start;
}
@media (max-width: 860px) { .proj-block { grid-template-columns: 1fr; gap: var(--s-3); } }

.proj-block__h {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 2.15rem);
  line-height: 1;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--ink);
  display: flex;
  gap: var(--s-2);
  align-items: baseline;
}
.proj-block__n { color: var(--accent); flex: 0 0 auto; }
.proj-block__body { max-width: 62ch; }
.proj-block__body .body-text + .body-text { margin-top: var(--s-2); }
.proj-block__body strong { color: var(--ink); font-weight: 600; }
.proj-block__body em { font-style: italic; }
.proj-block__body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88em;
  background: rgba(17,17,17,0.06);
  padding: 2px 6px;
  border-radius: 3px;
}
.proj-quote {
  margin-top: var(--s-3);
  padding-left: var(--s-3);
  border-left: 2px solid var(--accent);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  line-height: 1.35;
  color: var(--on-light-2);
}

/* ---- pager ---- */
.proj-pager {
  display: flex;
  justify-content: space-between;
  gap: var(--s-3);
  flex-wrap: wrap;
  padding-top: clamp(var(--s-4), 5vw, var(--s-6));
}
.proj-pager a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--on-light-3);
  transition: color .3s var(--ease-out), transform .3s var(--ease-out);
}
.proj-pager a:hover { color: var(--accent); }
.proj-pager__prev:hover { transform: translateX(-5px); }
.proj-pager__next:hover { transform: translateX(5px); }
.proj-pager__next { text-align: right; margin-left: auto; }
.proj-pager__name {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.2vw, 1.75rem);
  line-height: 1;
  text-transform: uppercase;
  color: inherit;
}

/* ---- live demo ---- */
.proj-live { margin-top: var(--s-3); }

/* ---- screenshots: the product, actually running ---- */
.proj-shots {
  display: grid;
  gap: clamp(var(--s-4), 5vw, var(--s-6));
  padding-block: clamp(var(--s-5), 6vw, var(--s-7));
  border-bottom: 1px solid var(--rule-light);
}
.proj-shot { display: block; }
.proj-shot__btn {
  display: block;
  width: 100%;
  padding: 0;
  border: 1px solid var(--rule-light);
  background: none;
  cursor: pointer;
  overflow: hidden;
  transition: border-color .35s var(--ease-out);
}
.proj-shot__btn:hover { border-color: var(--on-light-3); }
.proj-shot__btn img {
  width: 100%;
  display: block;
  transition: transform .6s var(--ease-out);
}
.proj-shot__btn:hover img { transform: scale(1.012); }
.proj-shot__cap {
  display: block;
  margin-top: var(--s-2);
  color: var(--on-light-3);
  max-width: 68ch;
  line-height: 1.6;
  /* descriptive sentences, not labels — all-caps mono is unreadable here */
  text-transform: none;
  letter-spacing: 0;
  font-size: 13.5px;
}

/* the first shot carries the page — give it the full width, then pair
   the rest so the section doesn't read as a stack of equal slabs */
@media (min-width: 900px) {
  .proj-shots { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  /* full-width lead only when the count is odd, so an even set pairs
     cleanly instead of leaving an orphan in the last row */
  .proj-shot:first-child:nth-last-child(odd) { grid-column: 1 / -1; }
}

/* ---- engineering index: group headings ---- */
.eng-group-head {
  display: block;
  color: var(--accent);
  margin-top: clamp(var(--s-5), 6vw, var(--s-7));
  padding-bottom: var(--s-2);
  border-bottom: 1px solid var(--rule-light);
}
.eng-group-lede {
  max-width: 60ch;
  margin-top: var(--s-3);
  color: var(--on-light-3);
}

/* ---- research papers ---- */
.paper-list { display: block; }
.paper {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: var(--s-3);
  padding-block: clamp(var(--s-4), 5vw, var(--s-6));
  border-bottom: 1px solid var(--rule-light);
}
@media (max-width: 760px) { .paper { grid-template-columns: 1fr; gap: var(--s-2); } }
.paper__n { color: var(--accent); }
/* the text inside is capped element by element, so figures can use
   the full column instead of inheriting a reading measure */
.paper__body { max-width: none; }

.paper__authors, .paper__meta, .paper__findings, .paper__tags, .paper__links { max-width: 78ch; }
.paper__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px var(--s-3);
  color: var(--on-light-3);
  margin-bottom: var(--s-2);
}
.paper__venue { color: var(--on-light-2); }

.paper__title {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.7vw, 2.3rem);
  max-width: 24ch;
  line-height: 1;
  letter-spacing: -0.012em;
  text-transform: uppercase;
  color: var(--on-light-1);
}
.paper__authors { color: var(--on-light-3); margin-top: 8px; }
.paper__note {
  margin-top: var(--s-2);
  color: var(--on-light-3);
  max-width: 78ch;
}

.paper__findings {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: var(--s-3);
  margin-top: var(--s-3);
  padding-top: var(--s-3);
  border-top: 1px solid var(--rule-light);
}
.paper__finding-v {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.1vw, 1.7rem);
  line-height: 1;
  color: var(--on-light-1);
}
.paper__finding-l { display: block; margin-top: 6px; color: var(--on-light-3); }

.paper__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--s-3);
}
.paper__tags span {
  border: 1px solid var(--rule-light);
  border-radius: 999px;
  padding: 5px 11px;
  color: var(--on-light-3);
}
.paper__link { margin-top: var(--s-3); display: inline-block; }

.paper__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-2) var(--s-3);
  margin-top: var(--s-3);
}
.paper__link { margin-top: 0; }
.paper__doi {
  color: var(--on-light-3);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-transform: none;
  letter-spacing: 0;
  transition: color .3s var(--ease-out);
}
.paper__doi:hover { color: var(--accent); }
/* a paper still under review says so, rather than implying a venue */
.paper__status {
  color: var(--accent);
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 2px 9px;
}

/* ---- figures on an embargoed paper ---- */
.paper__figs {
  display: grid;
  gap: var(--s-3);
  margin-top: var(--s-4);
}
@media (min-width: 900px) {
  .paper__figs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .paper__fig:first-child:nth-last-child(odd) { grid-column: 1 / -1; }
}
.paper__fig-btn {
  display: block;
  width: 100%;
  padding: 0;
  border: 1px solid var(--rule-light);
  background: #fff;
  cursor: pointer;
  overflow: hidden;
  transition: border-color .35s var(--ease-out);
}
.paper__fig-btn:hover { border-color: var(--on-light-3); }
.paper__fig-btn img { width: 100%; display: block; }
.paper__fig-cap {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--on-light-3);
  max-width: 62ch;
}
.paper__embargo {
  color: var(--on-light-3);
  text-transform: none;
  letter-spacing: 0;
  font-style: italic;
}

/* ================= Research index rows ================= */
.paper-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) auto;
  gap: var(--s-3);
  align-items: start;
  padding-block: clamp(var(--s-4), 4.5vw, var(--s-5));
  border-bottom: 1px solid var(--rule-light);
  color: inherit;
  text-decoration: none;
  transition: background .4s var(--ease-out);
}
.paper-row:hover { background: var(--tint-light); }
@media (max-width: 760px) { .paper-row { grid-template-columns: 1fr auto; } .paper-row__n { grid-column: 1 / -1; } }
.paper-row__n { color: var(--accent); }
.paper-row__body { display: block; max-width: 74ch; }
.paper-row__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px var(--s-3);
  color: var(--on-light-3);
  margin-bottom: var(--s-2);
}
.paper-row__venue { color: var(--on-light-2); }
.paper-row__title {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.3vw, 1.95rem);
  line-height: 1.02;
  letter-spacing: -0.012em;
  text-transform: uppercase;
  color: var(--on-light-1);
  max-width: 26ch;
  transition: color .3s var(--ease-out);
}
.paper-row:hover .paper-row__title { color: var(--accent); }
.paper-row__authors { display: block; color: var(--on-light-3); margin-top: 8px; }
.paper-row__summary {
  display: block;
  margin-top: var(--s-2);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--on-light-3);
  max-width: 66ch;
}
/* data hints: enough to make someone open the paper, not the results */
.paper-row__hints {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3) clamp(var(--s-3), 4vw, var(--s-5));
  margin-top: var(--s-3);
  padding-top: var(--s-3);
  border-top: 1px solid var(--rule-light);
}
.paper-row__hint { display: block; }
.paper-row__hint-v {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.7vw, 1.35rem);
  line-height: 1;
  color: var(--on-light-1);
}
.paper-row__hint-l { display: block; margin-top: 5px; color: var(--on-light-3); }

/* ================= Paper page ================= */
.paper-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.6vw, 3.9rem);
  line-height: 0.94;
  letter-spacing: -0.018em;
  text-transform: uppercase;
  color: var(--on-light-1);
  max-width: 22ch;
}
.paper-hero__authors { color: var(--on-light-3); margin-top: var(--s-2); }
.paper-hero__venue { color: var(--accent); }

.paper-side { display: block; }
.paper-access {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--s-2);
}
.paper-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--s-3);
}
.paper-tags span {
  border: 1px solid var(--rule-light);
  border-radius: 999px;
  padding: 5px 11px;
  color: var(--on-light-3);
}

.paper-figs {
  display: grid;
  gap: clamp(var(--s-4), 5vw, var(--s-6));
  padding-block: clamp(var(--s-5), 6vw, var(--s-7));
  border-bottom: 1px solid var(--rule-light);
}
@media (min-width: 900px) {
  .paper-figs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .paper-figs > .paper__fig:first-child:nth-last-child(odd) { grid-column: 1 / -1; }
}