/* ============================================================
   Custom additions on top of the Academic Project Page Template
   (light theme: white cards, blue accent, green/red verdict chips)
   ============================================================ */
:root{
  --c-ink:#1e293b; --c-mut:#64748b; --c-line:#e2e8f0; --c-blue:#2563eb;
  --c-ok:#16a34a; --c-okbg:#dcfce7; --c-bad:#dc2626; --c-badbg:#fee2e2;
  --c-hi:#16a34a; --c-mid:#65a30d; --c-lo:#d97706; --c-zero:#94a3b8; --c-neg:#dc2626;
}

/* ---------- teaser ---------- */
.teaser-hook{font-size:1.2rem;color:var(--c-ink);max-width:720px;margin:0 auto;line-height:1.5}
.teaser-hook em{font-style:italic;color:var(--c-blue)}
.vdg-eq{display:inline-block;margin:1.6rem auto .8rem;padding:.7rem 1.2rem;border-radius:12px;
  font-family:'JetBrains Mono',ui-monospace,monospace;font-weight:600;color:#0f172a;
  background:#f1f5f9;border:1px solid var(--c-line);font-size:clamp(.8rem,2.4vw,1rem)}
.teaser-sub{color:var(--c-mut);font-size:1rem}

/* ---------- method ladder ---------- */
.method-lede{color:var(--c-mut)!important;max-width:720px;margin:0 auto 2rem!important;font-weight:400}
.ladder-card{height:100%;background:#fff;border:1px solid var(--c-line);border-radius:14px;padding:1.4rem;
  box-shadow:0 1px 2px rgba(0,0,0,.04);position:relative;overflow:hidden}
.ladder-card::before{content:"";position:absolute;left:0;top:0;height:3px;width:var(--w,25%);
  background:linear-gradient(90deg,#667eea,#22d3ee)}
.column.is-3:nth-child(1) .ladder-card{--w:25%}
.column.is-3:nth-child(2) .ladder-card{--w:50%}
.column.is-3:nth-child(3) .ladder-card{--w:75%}
.column.is-3:nth-child(4) .ladder-card{--w:100%}
.ladder-n{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:8px;
  background:#eef2ff;color:var(--c-blue);font-weight:800;margin-bottom:.7rem}
.ladder-card h3{font-size:1.05rem;font-weight:700;margin-bottom:.35rem;color:var(--c-ink)}
.ladder-card p{font-size:.9rem;color:var(--c-mut);margin:0}
.ladder-foot{margin-top:1.6rem;color:var(--c-mut)}
.ladder-foot code,.demo-foot code,.result-note code{background:#f1f5f9;padding:2px 7px;border-radius:6px;font-size:.85em}

/* ---------- demo examples ---------- */
.demo-section .method-lede{margin-bottom:2.2rem!important}
.ex{background:#fff;border:1px solid var(--c-line);border-radius:16px;padding:1.5rem clamp(1rem,2.5vw,1.75rem);
  box-shadow:0 4px 6px -1px rgba(0,0,0,.06);margin-bottom:1.6rem}
.ex-task{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:var(--c-blue);background:#eff6ff;border:1px solid #dbeafe;border-radius:999px;padding:.3rem .75rem}
.ex-q{font-size:clamp(1.05rem,2.4vw,1.3rem);font-weight:700;margin:.7rem 0 .3rem;color:var(--c-ink)}
.ex-legend{color:var(--c-mut);font-size:.85rem;margin-bottom:.7rem}
.ex-opts{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1.1rem}
.opt{font-size:.82rem;padding:.35rem .7rem;border-radius:8px;border:1px solid var(--c-line);background:#f8fafc;color:var(--c-mut)}
.opt.gt{border-color:#bbf7d0;background:var(--c-okbg);color:#166534;font-weight:600}
.opt.gt::before{content:"✓ ";color:var(--c-ok);font-weight:800}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:.8rem}
@media(max-width:768px){.grid4{grid-template-columns:1fr 1fr}}
@media(max-width:460px){.grid4{grid-template-columns:1fr}}
.vcell{background:#f8fafc;border:1px solid var(--c-line);border-radius:12px;overflow:hidden;display:flex;flex-direction:column}
.vcell-label{display:flex;justify-content:space-between;align-items:baseline;padding:.6rem .7rem .2rem;font-size:.78rem;font-weight:600;color:var(--c-ink)}
.vcell-label small{color:var(--c-mut);font-weight:400;font-size:.68rem}
.vcell video{width:100%;aspect-ratio:16/9;object-fit:cover;background:#000;display:block}
.vcell-ans{padding:.6rem .7rem;display:flex;align-items:center;gap:.5rem;font-size:.8rem;border-top:1px solid var(--c-line);color:var(--c-mut)}
.chip{display:inline-grid;place-items:center;min-width:22px;height:22px;padding:0 6px;border-radius:6px;font-weight:800;font-size:.8rem}
.chip.ok{background:var(--c-okbg);color:var(--c-ok)}
.chip.bad{background:var(--c-badbg);color:var(--c-bad)}
.vcell-ans .r{margin-left:auto;font-size:.7rem}
.verdict{margin-top:1.1rem;display:flex;gap:.8rem;align-items:flex-start;padding:.9rem 1.1rem;border-radius:12px;font-size:.9rem}
.verdict.no{background:#fef2f2;border:1px solid #fecaca}
.verdict.yes{background:#f0fdf4;border:1px solid #bbf7d0}
.verdict-k{font-weight:800;white-space:nowrap}
.verdict.no .verdict-k{color:var(--c-bad)}
.verdict.yes .verdict-k{color:var(--c-ok)}
.demo-foot{color:var(--c-mut);font-size:.82rem;margin-top:1.4rem}

/* ---------- results ---------- */
.result-card{height:100%;background:#fff;border:1px solid var(--c-line);border-radius:14px;padding:1.5rem;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.result-h{font-size:1.05rem;font-weight:700;color:var(--c-ink);margin-bottom:1.3rem;display:flex;justify-content:space-between;align-items:baseline;gap:.6rem}
.result-h span{color:var(--c-mut);font-weight:400;font-size:.72rem}
.result-note{color:var(--c-mut);font-size:.83rem;margin-top:1.1rem}
.bars{display:flex;flex-direction:column;gap:.85rem}
.bar-row{display:grid;grid-template-columns:145px 1fr 48px;align-items:center;gap:.7rem;font-size:.82rem}
.bar-lab{color:var(--c-mut)}
.bar-row.low .bar-lab{color:var(--c-neg);font-weight:600}
.bar-track{display:block;height:11px;border-radius:999px;background:#eef2f7;overflow:hidden}
.bar-fill{display:block;height:100%;border-radius:999px;width:0;background:linear-gradient(90deg,#667eea,#22d3ee);transition:width 1.1s cubic-bezier(.2,.8,.2,1)}
.bar-row.low .bar-fill{background:linear-gradient(90deg,#f97316,#ef4444)}
.bar-val{text-align:right;font-family:'JetBrains Mono',monospace;font-weight:700;color:var(--c-ink)}
.mtable{width:100%;border-collapse:collapse;font-size:.85rem}
.mtable th,.mtable td{padding:.6rem .5rem;text-align:right;border-bottom:1px solid var(--c-line)}
.mtable th:first-child,.mtable td:first-child{text-align:left}
.mtable th{color:var(--c-mut);font-weight:600;font-size:.7rem;text-transform:uppercase;letter-spacing:.05em}
.mtable td{font-family:'JetBrains Mono',monospace;color:var(--c-ink)}
.mtable td:first-child{font-family:inherit;font-weight:600}
.mtable td:last-child{font-weight:700}
.vdg-pos{color:var(--c-ok)} .vdg-lo{color:var(--c-lo)} .vdg-neg{color:var(--c-neg)}

/* BibTeX copy button (align with template) */
.bibtex-header{display:flex;align-items:center;gap:1rem}
.bibtex-header .title{margin-bottom:0}