/* ============ PhysioSplat project site ============ */
:root{
  --bg:#06080f;
  --bg-2:#0b0f1c;
  --panel:rgba(255,255,255,.035);
  --panel-brd:rgba(255,255,255,.09);
  --ink:#eaf0ff;
  --muted:#8b97b5;
  --cyan:#4cc9f0;
  --mag:#f72585;
  --gold:#ffd166;
  --grad:linear-gradient(120deg,#4cc9f0,#7b9bff 40%,#f72585);
  --maxw:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:radial-gradient(1200px 700px at 70% -10%,#101a33 0%,var(--bg) 55%) fixed;
  color:var(--ink);
  font-family:'Inter',system-ui,sans-serif;
  line-height:1.65;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
.mono{font-family:'JetBrains Mono',monospace}

/* canvas bg */
#splat-bg{position:fixed;inset:0;width:100%;height:100%;z-index:0;opacity:.55}
.vignette{position:fixed;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(900px 600px at 50% 30%,transparent 40%,rgba(4,6,12,.7) 100%)}
nav,header,section,footer{position:relative;z-index:2}

/* ============ NAV ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px clamp(18px,4vw,46px);
  backdrop-filter:blur(14px);
  background:linear-gradient(180deg,rgba(6,8,15,.85),rgba(6,8,15,0));
  transition:background .3s;
}
.nav.scrolled{background:rgba(6,8,15,.9);border-bottom:1px solid var(--panel-brd)}
.nav-brand{font-family:'Space Grotesk';font-weight:700;font-size:1.15rem;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:9px;letter-spacing:.3px}
.nav-links{display:flex;align-items:center;gap:clamp(10px,2vw,26px)}
.nav-links a{color:var(--muted);text-decoration:none;font-size:.92rem;font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--ink)}
.nav-cta{padding:7px 15px;border:1px solid var(--panel-brd);border-radius:999px;color:var(--ink)!important;background:var(--panel)}
.nav-cta:hover{border-color:var(--cyan);box-shadow:0 0 22px rgba(76,201,240,.25)}
.pulse-dot{width:9px;height:9px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 0 rgba(76,201,240,.6);animation:pulse 2.2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(76,201,240,.55)}70%{box-shadow:0 0 0 12px rgba(76,201,240,0)}100%{box-shadow:0 0 0 0 rgba(76,201,240,0)}}

/* ============ HERO ============ */
.hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:120px 20px 60px}
.hero-tag{font-family:'JetBrains Mono';font-size:.78rem;letter-spacing:2px;text-transform:uppercase;color:var(--cyan);
  border:1px solid rgba(76,201,240,.3);padding:6px 16px;border-radius:999px;background:rgba(76,201,240,.06);margin-bottom:26px}
.hero-title{font-family:'Space Grotesk';font-weight:700;font-size:clamp(3.4rem,11vw,8rem);line-height:.95;letter-spacing:-2px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  background-size:200% auto;animation:shimmer 6s linear infinite}
@keyframes shimmer{to{background-position:200% center}}
.hero-sub{margin-top:18px;font-family:'Space Grotesk';font-weight:500;font-size:clamp(1.05rem,2.6vw,1.5rem);color:#c4cee6}
.authors{margin-top:30px;display:flex;gap:26px;flex-wrap:wrap;justify-content:center;font-size:1.05rem;font-weight:600}
.authors a{color:var(--ink);text-decoration:none;border-bottom:1px solid transparent;transition:.2s}
.authors a:hover{border-color:var(--cyan)}
.authors sup{color:var(--cyan)}
.affil{margin-top:8px;color:var(--muted);font-size:.92rem}
.affil sup{color:var(--cyan)}
.hero-btns{margin-top:38px;display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 24px;border-radius:999px;font-weight:600;font-size:.96rem;text-decoration:none;transition:transform .18s,box-shadow .25s,background .2s;cursor:pointer;border:none}
.btn-primary{background:var(--grad);background-size:160% auto;color:#04060d}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 40px rgba(76,201,240,.4)}
.btn-ghost{background:var(--panel);border:1px solid var(--panel-brd);color:var(--ink)}
.btn-ghost:hover{transform:translateY(-3px);border-color:var(--cyan)}
.hero-stats{margin-top:54px;display:flex;gap:clamp(20px,5vw,64px);flex-wrap:wrap;justify-content:center}
.hstat{display:flex;flex-direction:column;gap:4px}
.hstat b{font-family:'Space Grotesk';font-size:clamp(1.8rem,4vw,2.7rem);background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hstat span{font-size:.8rem;color:var(--muted);letter-spacing:.5px}
.scroll-hint{margin-top:56px;font-family:'JetBrains Mono';font-size:.75rem;letter-spacing:2px;color:var(--muted);animation:bob 2s ease-in-out infinite}
@keyframes bob{50%{transform:translateY(8px)}}

/* ============ SECTIONS ============ */
.section{max-width:var(--maxw);margin:0 auto;padding:clamp(70px,11vw,140px) clamp(20px,4vw,40px)}
.section.narrow{max-width:880px}
.section-head{text-align:center;margin-bottom:54px}
.eyebrow{font-family:'JetBrains Mono';font-size:.78rem;letter-spacing:3px;text-transform:uppercase;color:var(--cyan);margin-bottom:14px}
h2{font-family:'Space Grotesk';font-weight:700;font-size:clamp(1.9rem,4.5vw,3rem);letter-spacing:-1px;line-height:1.1}
.muted{color:var(--muted)}
.section-head .muted{margin-top:14px;font-size:1.02rem;max-width:640px;margin-left:auto;margin-right:auto}
.lede{font-size:clamp(1.1rem,2.4vw,1.45rem);line-height:1.65;color:#cdd6ee}
.lede em{color:var(--gold);font-style:italic}
.lede b{color:#fff}
.eyebrow+ .lede{margin-top:10px}

/* ============ PILLARS ============ */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pillar{position:relative;padding:34px 28px 26px;border-radius:20px;background:var(--panel);border:1px solid var(--panel-brd);overflow:hidden;transition:transform .3s,border-color .3s,box-shadow .3s}
.pillar::before{content:"";position:absolute;inset:0;background:radial-gradient(420px 220px at 50% -30%,var(--accent,#4cc9f0),transparent 70%);opacity:0;transition:opacity .4s}
.pillar[data-accent]{--accent:#4cc9f0}
.pillar:hover{transform:translateY(-8px);border-color:color-mix(in srgb,var(--accent) 60%,transparent);box-shadow:0 24px 60px rgba(0,0,0,.45)}
.pillar:hover::before{opacity:.12}
.pillar-num{font-family:'JetBrains Mono';font-size:.85rem;color:var(--accent);opacity:.7}
.pillar-icon{font-size:2.1rem;margin:10px 0 14px}
.pillar h3{font-family:'Space Grotesk';font-size:1.4rem;color:var(--accent)}
.pillar h4{font-size:.95rem;font-weight:600;color:#dfe6f7;margin:2px 0 12px}
.pillar p{font-size:.95rem;color:#aeb8d4}
.pillar p b{color:#fff}
.pillar .mono{color:var(--accent)}
.pillar-foot{margin-top:18px;font-family:'JetBrains Mono';font-size:.74rem;letter-spacing:1px;color:var(--muted);border-top:1px solid var(--panel-brd);padding-top:12px}

/* ============ PIPELINE ============ */
.pipeline{display:flex;align-items:stretch;justify-content:center;gap:6px;flex-wrap:wrap}
.pipe-step{flex:1;min-width:120px;display:flex;flex-direction:column;align-items:center;gap:4px;text-align:center;padding:18px 12px;border-radius:14px;background:var(--panel);border:1px solid var(--panel-brd)}
.pipe-step span{font-size:1.6rem}
.pipe-step b{font-family:'Space Grotesk';font-size:.96rem}
.pipe-step small{color:var(--muted);font-size:.76rem}
.pipe-step.accent{border-color:rgba(76,201,240,.5);background:rgba(76,201,240,.08);box-shadow:0 0 30px rgba(76,201,240,.18)}
.pipe-arrow{display:flex;align-items:center;color:var(--cyan);font-size:1.3rem}

/* ============ COMPARE SLIDER ============ */
.compare-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.compare{position:relative;margin:0;aspect-ratio:400/360;border-radius:16px;overflow:hidden;border:1px solid var(--panel-brd);box-shadow:0 24px 60px rgba(0,0,0,.5);user-select:none;cursor:ew-resize;background:#000}
.cmp-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.cmp-front{position:absolute;inset:0;overflow:hidden;clip-path:inset(0 50% 0 0)}
.cmp-handle{position:absolute;top:0;bottom:0;left:50%;transform:translateX(-50%);display:flex;align-items:center;justify-content:center;pointer-events:none}
.cmp-line{position:absolute;top:0;bottom:0;width:2px;background:rgba(255,255,255,.85);box-shadow:0 0 18px rgba(76,201,240,.7)}
.cmp-grip{width:40px;height:40px;border-radius:50%;background:var(--grad);color:#04060d;display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:700;box-shadow:0 6px 24px rgba(0,0,0,.5)}
.cmp-label{position:absolute;top:12px;font-family:'JetBrains Mono';font-size:.7rem;padding:4px 10px;border-radius:7px;background:rgba(4,6,13,.72);backdrop-filter:blur(4px)}
.cmp-label-l{left:12px;color:var(--cyan)}
.cmp-label-r{right:12px;color:var(--muted)}
.cmp-cap{position:absolute;bottom:0;left:0;right:0;padding:8px;text-align:center;font-family:'Space Grotesk';font-weight:600;font-size:.84rem;color:#eaf0ff;background:linear-gradient(0deg,rgba(4,6,13,.85),transparent)}

/* ============ SHOTS ============ */
.shot{border-radius:18px;overflow:hidden;border:1px solid var(--panel-brd);background:var(--panel);margin-bottom:26px}
.shot img{display:block;width:100%;height:auto;background:#fafafa}
.shot figcaption{padding:16px 22px;font-size:.92rem;color:#aeb8d4}
.shot figcaption b{color:#fff}
.shot-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.shot-grid .shot{margin-bottom:0}

/* per-case split cards */
.block-intro{max-width:760px;margin:0 auto 30px;text-align:center;color:#aeb8d4;font-size:1rem}
.block-intro b{color:#fff}.block-intro em{color:var(--gold);font-style:italic}
.case-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.case-card{position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--panel-brd);background:#0c1120;transition:transform .3s,border-color .3s,box-shadow .3s}
.case-card:hover{transform:translateY(-6px);border-color:rgba(76,201,240,.5);box-shadow:0 22px 50px rgba(0,0,0,.5)}
.case-card img{display:block;width:100%;height:auto;background:#fff}
.case-card figcaption{padding:11px 14px;font-family:'Space Grotesk';font-weight:600;font-size:.9rem;text-align:center;color:#dfe6f7}
.case-tag{position:absolute;left:10px;font-family:'JetBrains Mono';font-size:.66rem;letter-spacing:.5px;padding:3px 9px;border-radius:7px;backdrop-filter:blur(4px);text-transform:uppercase}
.tag-in{top:10px;background:rgba(247,37,133,.16);color:#ff8fc0;border:1px solid rgba(247,37,133,.4)}
.tag-out{top:50%;background:rgba(76,201,240,.16);color:var(--cyan);border:1px solid rgba(76,201,240,.4)}
.frustum-grid{grid-template-columns:repeat(2,1fr);max-width:760px;margin:0 auto}
.frustum-grid .case-card img{background:#fafafa}
.dv-clip{max-width:880px;margin:0 auto;border-radius:18px;overflow:hidden;border:1px solid var(--panel-brd);background:#f7f8fa;box-shadow:0 24px 60px rgba(0,0,0,.45)}
.dv-clip video{display:block;width:100%;height:auto;background:#f7f8fa}
.dv-clip figcaption{padding:15px 22px;font-size:.92rem;color:#aeb8d4;background:var(--panel)}
.sub-head{text-align:center;margin:64px auto 30px;max-width:680px}
.sub-head h3{font-family:'Space Grotesk';font-weight:700;font-size:clamp(1.3rem,3vw,1.8rem)}
.sub-head .muted{margin-top:10px;font-size:.98rem}

/* ============ BARS ============ */
.bars{display:flex;flex-direction:column;gap:30px;max-width:820px;margin:0 auto}
.bar-row{display:grid;grid-template-columns:170px 1fr;gap:10px 16px;align-items:center}
.bar-name{grid-row:span 2;font-family:'Space Grotesk';font-weight:600;font-size:.98rem}
.bar-track{height:30px;border-radius:8px;background:rgba(255,255,255,.05);overflow:hidden}
.bar{height:100%;width:0;border-radius:8px;display:flex;align-items:center;justify-content:flex-end;padding-right:12px;font-family:'JetBrains Mono';font-size:.78rem;white-space:nowrap;transition:width 1.3s cubic-bezier(.22,1,.36,1)}
.bar.show{width:var(--w)}
.bar-prev{background:linear-gradient(90deg,#2a3250,#3a4570);color:#c6cee6}
.bar-ours{background:var(--grad);color:#04060d;font-weight:600;box-shadow:0 0 26px rgba(76,201,240,.3)}

.ablation-cards{margin:54px auto 8px;display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap}
.acard{background:var(--panel);border:1px solid var(--panel-brd);border-radius:14px;padding:18px 22px;text-align:center;min-width:104px}
.acard .aval{font-family:'Space Grotesk';font-weight:700;font-size:1.7rem}
.acard .alab{font-size:.78rem;color:var(--muted);margin-top:3px}
.acard-full{border-color:rgba(76,201,240,.5);background:rgba(76,201,240,.08);box-shadow:0 0 30px rgba(76,201,240,.18)}
.acard-full .aval{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.aplus{color:var(--cyan);font-size:1.3rem;font-weight:700}
.caption-center{text-align:center;margin-top:18px;font-size:.88rem}

/* ============ CODE ============ */
.code-card{border-radius:16px;overflow:hidden;border:1px solid var(--panel-brd);background:#070b15;box-shadow:0 24px 60px rgba(0,0,0,.4)}
.code-head{display:flex;align-items:center;gap:8px;padding:12px 16px;background:rgba(255,255,255,.03);border-bottom:1px solid var(--panel-brd)}
.dot{width:11px;height:11px;border-radius:50%}
.dot.r{background:#ff5f56}.dot.y{background:#ffbd2e}.dot.g{background:#27c93f}
.code-title{margin-left:8px;font-family:'JetBrains Mono';font-size:.8rem;color:var(--muted)}
.copy-btn{margin-left:auto;font-family:'JetBrains Mono';font-size:.76rem;color:var(--cyan);background:transparent;border:1px solid rgba(76,201,240,.35);border-radius:7px;padding:4px 12px;cursor:pointer;transition:.2s}
.copy-btn:hover{background:rgba(76,201,240,.12)}
.copy-btn.done{color:#27c93f;border-color:#27c93f}
pre{padding:20px 22px;overflow-x:auto}
pre code{font-family:'JetBrains Mono';font-size:.86rem;line-height:1.8;color:#d6deef;white-space:pre}
pre code .c{color:#5e6b8c}

/* ============ FOOTER ============ */
.footer{text-align:center;padding:70px 20px 56px;border-top:1px solid var(--panel-brd);margin-top:40px}
.foot-brand{font-family:'Space Grotesk';font-weight:700;font-size:1.3rem;display:inline-flex;align-items:center;gap:9px}
.footer p{color:var(--muted);margin-top:10px;font-size:.92rem}
.foot-links{margin-top:18px;display:flex;gap:22px;justify-content:center}
.foot-links a{color:var(--cyan);text-decoration:none;font-weight:500;font-size:.92rem}
.foot-links a:hover{text-decoration:underline}
.foot-fine{font-size:.8rem;margin-top:22px;opacity:.7}

/* ============ REVEAL ============ */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s cubic-bezier(.22,1,.36,1),transform .8s cubic-bezier(.22,1,.36,1)}
.reveal.in{opacity:1;transform:none}

/* ============ RESPONSIVE ============ */
@media(max-width:480px){
  .hero-title{font-size:clamp(2.6rem,15vw,3.4rem)}
  .hero{padding-left:14px;padding-right:14px}
}
@media(max-width:880px){
  .pillars{grid-template-columns:1fr}
  .shot-grid{grid-template-columns:1fr}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .compare-row{grid-template-columns:1fr;max-width:440px;margin:0 auto}
  .nav-links a:not(.nav-cta){display:none}
  .pipe-arrow{transform:rotate(90deg)}
  .pipeline{flex-direction:column;align-items:stretch}
  .bar-row{grid-template-columns:1fr}.bar-name{grid-row:auto}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}