.pv4r{--good:#1a7a4a;--good-soft:#e9f3ec;--bad:#b3392f;--bad-soft:#f8ece9;padding-bottom:40px}.pv4r-measure{width:min(100%,44rem);margin-inline:auto}.pv4r-wide{width:min(100%,62rem);margin-inline:auto}.pv4r-sec{padding-block:64px}.pv4r-sec+.pv4r-sec{border-top:1px solid var(--rule)}.pv4r-head{padding:72px 0 56px}.pv4r-head h1{letter-spacing:-.05em;text-wrap:balance;color:var(--ink);margin:16px 0 14px;font-size:clamp(2rem,3.4vw,2.9rem);font-weight:750;line-height:1.02}.pv4r-subtitle{max-width:40rem;color:var(--muted);margin:0;font-size:1rem;line-height:1.65}.pv4r-byline{align-items:center;gap:12px;margin-top:28px;display:flex}.pv4r-byline img{object-fit:cover;border:1px solid var(--ink);width:38px;height:38px}.pv4r-byline .name{color:var(--ink);font-size:.84rem;font-weight:700;line-height:1.2}.pv4r-byline .meta{color:var(--muted);font:500 .6rem/1.5 var(--font-mono), ui-monospace, monospace;letter-spacing:.1em;text-transform:uppercase}.pv4r-paper{border:1px solid var(--ink);background:var(--paper);max-width:36rem;box-shadow:6px 6px 0 var(--soft);grid-template-columns:auto 1fr auto;align-items:center;gap:16px;margin-top:24px;padding:16px 18px;text-decoration:none;transition:box-shadow .12s,transform .12s;display:grid}.pv4r-paper:hover{box-shadow:9px 9px 0 var(--soft);transform:translate(-1px,-1px)}.pv4r-paper:hover .pv4r-paper-btn{background:var(--orange)}.pv4r-paper-glyph{border:1px solid var(--ink);background:var(--canvas);width:34px;height:42px;position:relative}.pv4r-paper-glyph:before{content:"";border-style:solid;border-width:0 11px 11px 0;border-color:var(--ink) var(--paper);position:absolute;top:-1px;right:-1px}.pv4r-paper-glyph:after{content:"PDF";text-align:center;color:var(--ink);font:650 .48rem/1 var(--font-mono), ui-monospace, monospace;letter-spacing:.1em;position:absolute;bottom:6px;left:0;right:0}.pv4r-paper .k{color:var(--blue);font:650 .56rem/1.4 var(--font-mono), ui-monospace, monospace;letter-spacing:.18em;text-transform:uppercase;margin-bottom:5px;display:block}.pv4r-paper .t{color:var(--ink);letter-spacing:-.02em;font-size:.92rem;font-weight:750;line-height:1.25;display:block}.pv4r-paper .d{color:var(--muted);font:500 .6rem/1.5 var(--font-mono), ui-monospace, monospace;letter-spacing:.06em;margin-top:5px;display:block}.pv4r-paper-btn{background:var(--ink);color:#fff;font:650 .58rem/1 var(--font-mono), ui-monospace, monospace;letter-spacing:.14em;text-transform:uppercase;white-space:nowrap;align-items:center;gap:7px;padding:9px 14px;transition:background .12s;display:inline-flex}@media (max-width:620px){.pv4r-paper{grid-template-columns:auto 1fr}.pv4r-paper-btn{grid-column:1/-1;justify-content:center}}.pv4r-num{color:var(--blue);font:650 .64rem/1.45 var(--font-mono), ui-monospace, monospace;letter-spacing:.16em;text-transform:uppercase;margin-bottom:12px}.pv4r-sec h2{letter-spacing:-.04em;text-wrap:balance;color:var(--ink);margin:0 0 18px;font-size:clamp(1.35rem,2.4vw,1.75rem);font-weight:750;line-height:1.12}.pv4r-prose p{color:var(--muted);margin:0 0 17px;font-size:.96rem;line-height:1.7}.pv4r-prose p:last-child{margin-bottom:0}.pv4r-prose code{border:1px solid var(--rule);background:var(--paper);color:var(--ink);font-family:var(--font-mono), ui-monospace, monospace;padding:.1em .35em;font-size:.84em}.pv4r-demo{border:1px solid var(--ink);background:var(--paper);box-shadow:10px 10px 0 var(--soft);margin-top:42px}.pv4r-demo-top{border-bottom:1px solid var(--ink);color:var(--muted);font:650 .58rem/1.4 var(--font-mono), ui-monospace, monospace;letter-spacing:.16em;text-transform:uppercase;justify-content:space-between;gap:16px;padding:12px 20px;display:flex}.pv4r-demo-body{display:grid}@media (min-width:820px){.pv4r-demo-body{grid-template-columns:1.15fr .85fr}}.pv4r-panel{padding:24px 22px 26px}@media (min-width:820px){.pv4r-panel{border-right:1px solid var(--rule)}.pv4r-panel:last-child{border-right:none}}@media (max-width:819px){.pv4r-panel{border-bottom:1px solid var(--rule)}.pv4r-panel:last-child{border-bottom:none}}.pv4r-panel-label{font:650 .58rem/1.4 var(--font-mono), ui-monospace, monospace;letter-spacing:.16em;text-transform:uppercase;margin-bottom:14px}.pv4r-panel.bad .pv4r-panel-label{color:var(--bad)}.pv4r-panel.good .pv4r-panel-label{color:var(--good)}.pv4r-id{color:var(--ink);font-family:var(--font-mono), ui-monospace, monospace;word-break:break-all;margin-bottom:15px;font-size:.88rem}.pv4r-chips{flex-wrap:wrap;gap:6px;display:flex}.pv4r-chip{border:1px solid var(--rule);background:var(--canvas);color:var(--muted);font-family:var(--font-mono), ui-monospace, monospace;padding:5px 8px;font-size:.66rem}.good .pv4r-chip{background:var(--good-soft);border-color:var(--good);color:var(--ink)}.bad .pv4r-chip:nth-child(3n){background:var(--bad-soft);border-color:var(--bad)}.pv4r-chip-note{color:var(--muted);margin-top:14px;font-size:.8rem;line-height:1.6}.pv4r-compare{gap:18px;margin-top:40px;display:grid}@media (min-width:820px){.pv4r-compare{grid-template-columns:1fr 1fr}}.pv4r-card{border:1px solid var(--ink);background:var(--paper);box-shadow:10px 10px 0 var(--soft);padding:24px 22px}.pv4r-card .tag{font:650 .56rem/1.4 var(--font-mono), ui-monospace, monospace;letter-spacing:.18em;text-transform:uppercase;margin-bottom:11px}.pv4r-card.bad .tag{color:var(--bad)}.pv4r-card.good .tag{color:var(--good)}.pv4r-card.plain .tag{color:var(--blue)}.pv4r-card h4{color:var(--ink);letter-spacing:-.03em;margin:0 0 9px;font-size:1.02rem;font-weight:750;line-height:1.25}.pv4r-card>p{color:var(--muted);margin:0;font-size:.84rem;line-height:1.6}.pv4r-card>p+p{margin-top:12px}.pv4r-mono-box{border:1px solid var(--rule);background:var(--canvas);color:var(--muted);font-family:var(--font-mono), ui-monospace, monospace;white-space:pre-wrap;margin-top:15px;padding:14px 15px;font-size:.72rem;line-height:1.8;overflow-x:auto}.pv4r-quote{text-align:center;width:min(100%,48rem);margin-inline:auto}.pv4r-quote blockquote{color:var(--ink);letter-spacing:-.04em;text-wrap:balance;margin:0;font-size:clamp(1.45rem,2.8vw,2.1rem);font-weight:750;line-height:1.15}.pv4r-quote .byline{color:var(--muted);font:650 .58rem/1.4 var(--font-mono), ui-monospace, monospace;letter-spacing:.18em;text-transform:uppercase;margin-top:16px}.pv4r-principles{gap:18px;margin-top:40px;display:grid}@media (min-width:820px){.pv4r-principles{grid-template-columns:repeat(4,1fr)}}.pv4r-principle{border:1px solid var(--ink);background:var(--paper);box-shadow:10px 10px 0 var(--soft);padding:22px 20px}.pv4r-principle .idx{color:var(--blue);font:650 .6rem/1 var(--font-mono), ui-monospace, monospace;letter-spacing:.12em;margin-bottom:12px}.pv4r-principle h4{color:var(--ink);letter-spacing:-.03em;margin:0 0 7px;font-size:.95rem;font-weight:750;line-height:1.25}.pv4r-principle p{color:var(--muted);margin:0;font-size:.8rem;line-height:1.55}.pv4r-code{margin-top:40px}.pv4r-code pre{border:1px solid var(--ink);background:var(--paper);box-shadow:10px 10px 0 var(--soft);color:var(--ink);font-family:var(--font-mono), ui-monospace, monospace;margin:0;padding:22px;font-size:.74rem;line-height:1.75;overflow-x:auto}.pv4r-bench{border:1px solid var(--ink);background:var(--paper);box-shadow:10px 10px 0 var(--soft);margin-top:40px;overflow-x:auto}.pv4r-bench table{border-collapse:collapse;width:100%}.pv4r-bench th,.pv4r-bench td{border-bottom:1px solid var(--rule);text-align:left;vertical-align:middle;padding:13px 18px}.pv4r-bench th{border-bottom:1px solid var(--ink);background:var(--canvas);color:var(--muted);font:650 .56rem/1.4 var(--font-mono), ui-monospace, monospace;letter-spacing:.16em;text-transform:uppercase}.pv4r-bench td{color:var(--muted);font-size:.86rem}.pv4r-bench td:first-child{color:var(--ink);font-weight:700}.pv4r-bench tr:last-child td{border-bottom:none}.pv4r-good{color:var(--good);font-weight:700}.pv4r-bad{color:var(--bad);font-weight:700}.pv4r-warn{color:#a8730a;font-weight:700}@media (max-width:640px){.pv4r-bench th:nth-child(3),.pv4r-bench td:nth-child(3){display:none}}.pv4r-story{gap:18px;margin-top:40px;display:grid}@media (min-width:820px){.pv4r-story{grid-template-columns:1.1fr .9fr}}.pv4r-flow{gap:10px;margin-top:18px;display:grid}.pv4r-step{border:1px solid var(--rule);background:var(--canvas);padding:14px 15px}.pv4r-step .t{color:var(--ink);margin-bottom:4px;font-size:.84rem;font-weight:700}.pv4r-step .n{color:var(--muted);font-size:.8rem;line-height:1.55}.pv4r-impact{border-top:1px solid var(--rule);grid-template-columns:6.5rem 1fr;align-items:start;gap:14px;padding:15px 0;display:grid}.pv4r-impact:first-of-type{border-top:none;padding-top:0}.pv4r-impact .v{color:var(--ink);letter-spacing:-.05em;font-size:1.8rem;font-weight:750;line-height:1}.pv4r-impact .l{color:var(--muted);font-size:.8rem;line-height:1.55}@media (max-width:640px){.pv4r-impact{grid-template-columns:1fr;gap:5px}}.pv4r-fig{border:1px solid var(--ink);background:var(--paper);box-shadow:10px 10px 0 var(--soft);margin:40px 0 0;padding:20px 22px 16px}.pv4r-fig svg{display:block;overflow:visible}.pv4r-fig-legend{font:650 .58rem/1 var(--font-mono), ui-monospace, monospace;letter-spacing:.14em;text-transform:uppercase;color:var(--ink);gap:18px;margin-bottom:14px;display:flex}.pv4r-fig-legend span{align-items:center;gap:7px;display:inline-flex}.pv4r-fig-legend i{border-radius:50%;width:10px;height:10px}.pv4r-fig figcaption{border-top:1px solid var(--rule);color:var(--muted);margin-top:14px;padding-top:12px;font-size:.78rem;line-height:1.55}.pv4r-fig-note{color:var(--muted);letter-spacing:.08em;text-transform:none;font-weight:500}