:root{
  --ink:#1c2027; --muted:#5b6470; --line:#e3e7ec;
  --accent:#c8792e;          /* warm material orange, from the icon */
  --panel:#0d0f14;           /* render background */
}
body{font-family:'Noto Sans','Google Sans',system-ui,sans-serif;color:var(--ink);}
.title,.bs-card-k{font-family:'Google Sans','Noto Sans',system-ui,sans-serif;}
.section.bs-tight{padding:2.4rem 1.5rem;}
.bs-sub{color:var(--muted);max-width:52rem;margin:0 auto 1.5rem;line-height:1.65;}
.has-text-centered.bs-sub{margin-left:auto;margin-right:auto;}

/* ---------- hero ---------- */
.hero{background:linear-gradient(180deg,#f7f9fb 0%,#fff 100%);border-bottom:1px solid var(--line);}
.hero-body{padding:3rem 1.5rem 2.2rem;}
.bs-icon{width:92px;height:92px;border-radius:20px;margin-bottom:1.1rem;
  box-shadow:0 6px 22px rgba(20,26,36,.18);}
.bs-title{line-height:1.25!important;letter-spacing:-.01em;margin-bottom:1.1rem!important;}
.bs-authors{margin-bottom:.4rem;}
.bs-authors a{color:var(--ink);border-bottom:1px solid rgba(200,121,46,.5);text-decoration:none;}
.bs-authors a:hover{color:var(--accent);}
.bs-affil{color:var(--muted);margin-bottom:1.4rem;}
.bs-buttons{display:flex;flex-wrap:wrap;gap:.55rem;justify-content:center;}
.bs-buttons .button{background:#242a33;border-color:#242a33;}
.bs-buttons .button:hover{background:#000;}
.bs-buttons .is-soon{opacity:.5;cursor:default;pointer-events:none;}

/* ---------- sticky nav ---------- */
.bs-nav{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);}
.bs-nav .container{display:flex;gap:1.5rem;justify-content:center;flex-wrap:wrap;padding:.7rem 1rem;}
.bs-nav a{color:var(--muted);font-size:.92rem;font-weight:600;text-decoration:none;}
.bs-nav a:hover{color:var(--accent);}

/* ---------- teaser ---------- */
/* Mirrors the paper's teaser band: column 1 stacks the point cloud over the
   egocentric keyframe strip, column 3 spans the same height. No rule here may
   select a bare `img`, or it would also hit the .bs-icon in the middle column
   (that collision is what previously stretched the icon). */
.bs-teaser-grid{display:grid;grid-template-columns:1fr 132px 1fr;gap:1.1rem;align-items:stretch;}
.bs-col{display:flex;flex-direction:column;margin:0;min-width:0;}
.bs-main{width:100%;border-radius:10px;background:var(--panel);display:block;}
.bs-grow{flex:1 1 auto;min-height:0;object-fit:contain;}
.bs-frames{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin-top:6px;}
.bs-frames img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:6px;
  display:block;background:var(--panel);}
.bs-col figcaption{color:var(--muted);font-size:.86rem;text-align:center;
  margin-top:.55rem;line-height:1.45;}

/* middle column: label / net / arrow / icon, vertically centred on the band */
.bs-mid{display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:.4rem;align-self:center;}
.bs-mid-label{font-weight:700;font-size:.8rem;letter-spacing:.01em;color:var(--ink);}
.bs-net{width:72px;height:auto;opacity:.85;}
.bs-mid .bs-icon{width:92px;height:92px;margin-bottom:0;object-fit:contain;flex:none;}
.bs-arrow{color:var(--accent);font-size:1.15rem;line-height:1;}
@media(max-width:768px){
  .bs-teaser-grid{grid-template-columns:1fr;}
  .bs-mid{flex-direction:row;justify-content:center;gap:.7rem;}
  .bs-arrow{transform:rotate(90deg);}
  .bs-grow{flex:none;}
}

/* ---------- material legend ---------- */
.bs-legend{display:flex;flex-wrap:wrap;gap:.5rem 1.1rem;justify-content:center;
  margin-top:1rem;font-size:.82rem;color:var(--muted);}
.bs-legend span{display:inline-flex;align-items:center;gap:.38rem;white-space:nowrap;}
.bs-legend i{width:11px;height:11px;border-radius:3px;background:var(--c);
  border:1px solid rgba(20,26,36,.28);display:inline-block;}

/* ---------- cards ---------- */
.bs-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:1.15rem 1.25rem;height:100%;
  box-shadow:0 1px 3px rgba(20,26,36,.05);}
.bs-card-k{font-weight:700;color:var(--accent);margin-bottom:.45rem;font-size:1.05rem;}
.bs-card p{color:#39424e;line-height:1.6;font-size:.95rem;}
.bs-soon{position:relative;opacity:.85;}
.bs-soon .tag{margin-top:.7rem;background:#eef1f5;color:var(--muted);}

.bs-abstract p{line-height:1.75;text-align:justify;}

/* ---------- video ---------- */
.bs-video{position:relative;padding-bottom:56.25%;height:0;border-radius:12px;overflow:hidden;}
.bs-video iframe{position:absolute;inset:0;width:100%;height:100%;}
.bs-video-placeholder{border:2px dashed var(--line);border-radius:12px;padding:3.5rem 1rem;text-align:center;color:var(--muted);}
.bs-video-placeholder i{font-size:2.6rem;color:#c9d0d9;display:block;margin-bottom:.6rem;}

/* ---------- before/after slider ---------- */
.bs-slider{position:relative;width:100%;border-radius:12px;overflow:hidden;background:var(--panel);
  user-select:none;touch-action:pan-y;cursor:ew-resize;}
.bs-slider img{display:block;width:100%;pointer-events:none;}
.bs-clip{position:absolute;inset:0;width:50%;overflow:hidden;}
.bs-clip img{position:absolute;top:0;left:0;height:100%;width:auto;max-width:none;}
.bs-handle{position:absolute;top:0;bottom:0;left:50%;width:2px;background:#fff;transform:translateX(-1px);
  box-shadow:0 0 0 1px rgba(0,0,0,.25);}
.bs-handle span{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:38px;height:38px;border-radius:50%;background:#fff;color:#242a33;
  display:flex;align-items:center;justify-content:center;box-shadow:0 2px 10px rgba(0,0,0,.3);}
.bs-tag{position:absolute;bottom:12px;padding:.2rem .6rem;border-radius:999px;font-size:.78rem;
  font-weight:600;background:rgba(13,15,20,.72);color:#eef2f8;}
.bs-tag-l{left:12px;} .bs-tag-r{right:12px;}
.bs-scenes{display:flex;gap:.5rem;justify-content:center;flex-wrap:wrap;margin-top:1rem;}
.bs-scenes button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:.35rem .95rem;
  font-size:.87rem;cursor:pointer;color:var(--muted);}
.bs-scenes button:hover{border-color:var(--accent);color:var(--accent);}
.bs-scenes button.is-active{background:#242a33;border-color:#242a33;color:#fff;}

/* ---------- figures, code, tables ---------- */
.bs-fig{margin-top:1.8rem;}
.bs-fig img{width:100%;border:1px solid var(--line);border-radius:10px;}
.bs-fig figcaption{color:var(--muted);font-size:.86rem;margin-top:.6rem;line-height:1.55;}
.bs-code,.bs-bibtex{background:var(--panel);color:#dbe3ee;border-radius:12px;padding:1.1rem 1.2rem;
  overflow-x:auto;font-size:.82rem;line-height:1.65;}
.bs-code .c{color:#7fb2ff;font-weight:600;}
.bs-code .m{color:#e0913a;}
.bs-code .d{color:#7fd18c;}
/* Tables scroll horizontally rather than squashing. Bulma's .table-container
   supplies overflow-x; the min-width is what stops `is-fullwidth` from
   shrinking the table to fit and defeating the scroll on narrow screens. */
.table-container{overflow-x:auto;-webkit-overflow-scrolling:touch;
  border-radius:8px;max-width:100%;}
.bs-table{font-size:.92rem;min-width:560px;}
.bs-table-wide{min-width:680px;}
.bs-table th{color:var(--muted);font-weight:600;border-bottom:2px solid var(--line)!important;}
.bs-table td,.bs-table th{vertical-align:middle;white-space:nowrap;}
.bs-table td:first-child,.bs-table th:first-child{white-space:normal;}
@media(max-width:768px){
  .bs-table{font-size:.82rem;}
  .bs-table td,.bs-table th{padding:.4rem .5rem;}
}
.bs-note{color:var(--muted);font-size:.9rem;line-height:1.6;margin-top:.8rem;}
.bs-limits li{color:#39424e;line-height:1.7;}
.bs-stats{display:flex;gap:1rem;flex-wrap:wrap;justify-content:center;margin-top:1.6rem;}
.bs-stats div{background:#f7f9fb;border:1px solid var(--line);border-radius:12px;padding:.9rem 1.4rem;text-align:center;min-width:120px;}
.bs-stats b{display:block;font-size:1.35rem;color:var(--ink);}
.bs-stats span{color:var(--muted);font-size:.82rem;}
.bs-mech .bs-card p{font-size:.93rem;}
.bs-footer{background:#f7f9fb;border-top:1px solid var(--line);padding:2rem 1.5rem;color:var(--muted);font-size:.87rem;}
.bs-footer a{color:var(--accent);}

/* ---------- pipeline figure ---------- */
.bs-arch{margin:1.4rem 0 1.8rem;}
.bs-arch-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
.bs-arch svg{width:100%;min-width:660px;height:auto;display:block;}

/* sub-heading above a table inside a section (spacing instead of a <br>) */
.bs-subhead{margin-top:2.2rem!important;margin-bottom:.9rem!important;}

/* ---------- teaser video row (two up) ---------- */
.bs-videos{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem;margin-top:1.3rem;}
.bs-videos figure{margin:0;min-width:0;}
.bs-videos video{width:100%;height:auto;display:block;border-radius:10px;
  background:var(--panel);}
.bs-videos figcaption{color:var(--muted);font-size:.84rem;text-align:center;
  margin-top:.5rem;line-height:1.45;}
.bs-videos-note{color:var(--muted);font-size:.84rem;text-align:center;margin-top:.7rem;}
@media(max-width:768px){.bs-videos{grid-template-columns:1fr;}}