@font-face{font-family:Plus Jakarta Sans;src:url(/fonts/plus-jakarta-sans.woff2)format("woff2");font-weight:200 800;font-style:normal;font-display:swap}:root{--bg:#f4f6fb;--surface:#fff;--surface-2:#eef1f8;--text:#111a2c;--muted:#56627a;--accent:#3b5bdb;--accent-strong:#2c47b8;--accent-soft:#e6ebfd;--on-accent:#fff;--good:#0c8a6b;--good-soft:#def4ec;--warn:#b4580a;--warn-soft:#fdeedd;--border:#dde3ee;--shadow:0 1px 2px #101a2c0d, 0 6px 24px -8px #101a2c1f;--night-1:#0e1834;--night-2:#26357a;--night-text:#eef1ff;--night-muted:#b9c3ea;--skin:#f1c7a4;--hair:#2b2f4a;--sheet:#dfe6f6;--pillow:#fff;--radius:18px;--max:46rem;--wide:78rem;--font:"Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;color-scheme:light}@media (prefers-color-scheme:dark){:root{--bg:#0a1020;--surface:#111a2e;--surface-2:#17223b;--text:#e7ecf7;--muted:#9ca8c2;--accent:#8fa3ff;--accent-strong:#b3c0ff;--accent-soft:#1b2650;--on-accent:#0a1020;--good:#52d1aa;--good-soft:#10302a;--warn:#f2b46c;--warn-soft:#33240f;--border:#233050;--shadow:0 1px 2px #0000004d, 0 8px 28px -10px #0009;--night-1:#070c1a;--night-2:#1a2558;--skin:#d9a988;--hair:#11142a;--sheet:#253157;--pillow:#c9d3f2;color-scheme:dark}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:5rem}body{background:var(--bg);color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased;overflow-wrap:break-word;margin:0;font-size:1.0625rem;line-height:1.7}img,svg{max-width:100%}a{color:var(--accent);text-underline-offset:.18em;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}.wrap{max-width:var(--max);margin:0 auto;padding:0 1rem}.wide{max-width:var(--wide)}@media (width>=640px){.wrap{padding:0 1.5rem}}header.site{z-index:10;border-bottom:1px solid var(--border);background:color-mix(in srgb, var(--surface) 85%, transparent);backdrop-filter:saturate(1.4)blur(12px);position:sticky;top:0}header.site .wrap{max-width:var(--wide);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.25rem 1.5rem;padding-block:.6rem;display:flex}.brand{letter-spacing:-.01em;color:var(--text);align-items:center;gap:.55rem;font-size:1.05rem;font-weight:800;text-decoration:none;display:flex}.brand img{width:30px;height:30px}nav.main{gap:.35rem;font-size:.92rem;font-weight:600;display:flex}nav.main a{color:var(--muted);white-space:nowrap;border-radius:999px;padding:.35rem .75rem;text-decoration:none}nav.main a:hover{color:var(--text);background:var(--surface-2)}nav.main a[aria-current]{color:var(--accent);background:var(--accent-soft)}@media (width<=639px){nav.main{scrollbar-width:none;order:3;width:calc(100% + 2rem);margin:0 -1rem;padding:0 1rem .15rem;overflow-x:auto}nav.main::-webkit-scrollbar{display:none}nav.main a:first-child{margin-left:-.75rem}}main{padding:2rem 0 4rem}main.flush{padding-top:0}h1,h2,h3{letter-spacing:-.02em;text-wrap:balance;line-height:1.2}h1{letter-spacing:-.03em;margin:0 0 .75rem;font-size:clamp(2rem,7vw,3rem);font-weight:800}h2{margin:2.75rem 0 .75rem;font-size:clamp(1.35rem,4.2vw,1.65rem);font-weight:750}h3{margin:1.75rem 0 .4rem;font-size:1.12rem;font-weight:700}p,ul,ol{margin:0 0 1.1rem}ul,ol{padding-left:1.3rem}li{margin-bottom:.45rem}li::marker{color:var(--accent)}strong{font-weight:700}.lede{color:var(--muted);font-size:clamp(1.1rem,3.4vw,1.25rem);line-height:1.6}.kicker{letter-spacing:.06em;text-transform:uppercase;color:var(--accent);align-items:center;gap:.4rem;margin-bottom:.75rem;font-size:.78rem;font-weight:700;display:inline-flex}.kicker a{color:inherit;text-decoration:none}.article-head{padding:1.25rem 0 .5rem}.byline{color:var(--muted);align-items:center;gap:.75rem;margin:1.25rem 0 1.75rem;font-size:.9rem;line-height:1.45;display:flex}.byline img{border-radius:50%;flex:none;width:44px;height:44px}.byline strong{color:var(--text)}.byline a{color:var(--muted)}.answer{background:var(--accent-soft);border-radius:var(--radius);margin:1.75rem 0;padding:1.25rem 1.25rem 1rem;position:relative}.answer:before{content:"Quick answer";letter-spacing:.08em;text-transform:uppercase;color:var(--on-accent);background:var(--accent);border-radius:999px;margin-bottom:.65rem;padding:.15rem .65rem;font-size:.72rem;font-weight:800;display:inline-block}.answer p:last-child{margin-bottom:0}@media (width>=640px){.answer{padding:1.5rem 1.75rem 1.25rem}}.note{background:var(--warn-soft);color:var(--text);border-radius:14px;padding:.9rem 1.1rem;font-size:.95rem}.tip{background:var(--good-soft);border-radius:14px;padding:.9rem 1.1rem;font-size:.95rem}.tip strong:first-child{color:var(--good)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin:1rem 0;padding:1.15rem 1.25rem}.card>:last-child{margin-bottom:0}.cards{grid-template-columns:repeat(auto-fit,minmax(min(100%,15rem),1fr));gap:1rem;margin:1.25rem 0;display:grid}.cards .card{margin:0}.cards h3{margin-top:0}.card ul{padding-left:1.1rem}a.card{color:inherit;flex-direction:column;text-decoration:none;transition:transform .15s,border-color .15s;display:flex}a.card:hover{border-color:var(--accent);transform:translateY(-2px)}a.card h3{color:var(--text)}a.card p{color:var(--muted);font-size:.95rem}a.card .more{color:var(--accent);margin-top:auto;font-size:.9rem;font-weight:700}.card .thumb{background:var(--surface-2);border-radius:12px;place-items:center;height:7.5rem;margin:-.35rem -.5rem .9rem;display:grid}.card .thumb svg{width:auto;height:82%}.card.good{border-top:4px solid var(--good)}.card.bad{border-top:4px solid var(--warn)}figure{margin:2rem 0}figure.panel,figure.diagram{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1rem}figcaption{color:var(--muted);margin-top:.75rem;font-size:.85rem;line-height:1.55}.diagram svg{width:100%;height:auto;display:block}.diagram .panels{grid-template-columns:repeat(auto-fit,minmax(min(100%,12rem),1fr));gap:.75rem;display:grid}.diagram .panel{background:var(--surface-2);border-radius:12px;padding:.5rem .6rem .6rem}.diagram .panel p{color:var(--muted);margin:.35rem 0 0;font-size:.88rem;line-height:1.45}.diagram .panel p strong{color:var(--text)}.diagram .panel p.ok strong{color:var(--good)}.diagram .panel p.off strong{color:var(--warn)}@media (width<=559px){.diagram .panels{grid-template-columns:1fr}.diagram .panel{grid-template-columns:48% 1fr;align-items:center;gap:.75rem;display:grid}.diagram .panel p{margin:0}}.diagram .bed{fill:var(--sheet)}.diagram .leg{stroke:var(--muted);stroke-linecap:round;fill:none}.diagram .leg.off{stroke:var(--warn)}.diagram .pelvis{fill:var(--surface);stroke:var(--muted);stroke-width:2px}.diagram .pillow{fill:var(--accent);opacity:.85}.diagram .pillow.alt{opacity:.45}.diagram polyline.pillow{fill:none;stroke:var(--accent)}.diagram .level{stroke:var(--accent);stroke-width:1.5px;stroke-dasharray:4 4}.diagram .outline{fill:var(--accent-soft);stroke:var(--accent);stroke-width:1.5px}.diagram .outline.plain{fill:none;stroke:var(--muted);stroke-dasharray:5 4}.diagram .arrow{fill:none;stroke:var(--warn);stroke-width:2.5px;stroke-linecap:round}.diagram .arrow-head{fill:var(--warn)}.diagram text{fill:var(--text);font-size:11px;font-family:var(--font)}.diagram .dim{fill:var(--muted);font-size:10px}.diagram .warn-text{fill:var(--warn);font-weight:700}.diagram .good-text{fill:var(--good);font-weight:700}.bars{gap:.4rem;display:grid}.bar{grid-template-columns:minmax(5.5rem,12rem) 1fr;align-items:center;gap:.75rem;font-size:.85rem;display:grid}.bar .label{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.bar .track{background:var(--surface-2);border-radius:999px;height:1.6rem;position:relative;overflow:hidden}.bar .fill{background:linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 70%, #8b5cf6));border-radius:999px;height:100%;display:block}.bar .val{color:var(--text);font-size:.78rem;font-weight:700;line-height:1.6rem;position:absolute;top:0;right:.6rem}@media (width<=479px){.bar{grid-template-columns:5.5rem 1fr;gap:.5rem}}.table-scroll{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:.9rem;line-height:1.5}th,td{text-align:left;border-bottom:1px solid var(--border);vertical-align:top;padding:.7rem .8rem}tbody tr:last-child>*{border-bottom:0}thead th{background:var(--surface-2);white-space:nowrap;color:var(--muted);font-size:.8rem;font-weight:700;position:sticky;top:0}tbody th{font-weight:700}th button{all:unset;cursor:pointer}th[aria-sort=ascending] button:after{content:" ▲";font-size:.7em}th[aria-sort=descending] button:after{content:" ▼";font-size:.7em}td.num{white-space:nowrap;font-variant-numeric:tabular-nums}.status{color:var(--muted);font-size:.75rem;display:inline-block}.flag{color:var(--warn);background:var(--warn-soft);border-radius:999px;margin-top:.25rem;padding:.05rem .5rem;font-size:.72rem;font-weight:700;display:inline-block}.shape{align-items:center;gap:.45rem;display:inline-flex}.shape svg{flex:none;width:2.2rem;height:auto}@media (width<=759px){.table-scroll:has(table.stack){box-shadow:none;background:0 0;border:0;overflow:visible}table.stack,table.stack tbody{display:block}table.stack thead{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}table.stack tr{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);grid-template-columns:1fr 1fr;gap:.1rem 1rem;margin-bottom:.85rem;padding:.9rem 1rem;display:grid}table.stack tr[hidden]{display:none}table.stack th,table.stack td{white-space:normal;border:0;padding:.35rem 0;display:block;min-width:0!important}table.stack td:before{content:attr(data-label);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-size:.68rem;font-weight:700;display:block}table.stack .full{grid-column:1/-1}table.stack .full:before{display:none}table.stack .title{border-bottom:1px solid var(--border);margin-bottom:.25rem;padding-bottom:.5rem;font-size:1.02rem;font-weight:700}}#pillows td:first-child{min-width:14rem}.filters{flex-wrap:wrap;gap:.6rem;margin:1.25rem 0;font-size:.88rem;display:flex}.filters label{color:var(--muted);flex-direction:column;flex:9rem;gap:.2rem;font-weight:600;display:flex}select{font:inherit;color:var(--text);border:1px solid var(--border);background:var(--surface);border-radius:12px;min-height:2.75rem;padding:.55rem 2rem .55rem .75rem;font-weight:600}.count{color:var(--muted);margin:-.25rem 0 .75rem;font-size:.88rem}.sources{color:var(--muted);font-size:.88rem}.sources a{color:var(--muted)}.hero{color:var(--night-text);background:radial-gradient(120% 90% at 85% 10%, var(--night-2), var(--night-1) 70%);position:relative;overflow:hidden}.hero .wrap{max-width:var(--wide);align-items:center;gap:1.5rem;padding-block:2.5rem 2rem;display:grid}@media (width>=860px){.hero .wrap{grid-template-columns:1.05fr 1fr;padding-block:4.5rem 4rem}}.hero h1{color:#fff;font-size:clamp(2.2rem,8vw,3.6rem)}.hero .lede{color:var(--night-muted);max-width:34rem}.hero .kicker{color:#c3cdff}.hero-art svg{width:100%;height:auto;display:block}.buttons{flex-wrap:wrap;gap:.75rem;margin-top:1.5rem;display:flex}.btn{color:#18224a;background:#fff;border-radius:999px;justify-content:center;align-items:center;gap:.4rem;min-height:3rem;padding:.7rem 1.3rem;font-size:.98rem;font-weight:700;text-decoration:none;display:inline-flex}.btn:hover{background:#e9edff}.btn.ghost{color:#fff;background:0 0;box-shadow:inset 0 0 0 1.5px #ffffff73}.btn.ghost:hover{background:#ffffff14}@media (width<=479px){.btn{flex:100%}}.section{padding:3rem 0 0}.section>.wrap>h2:first-child{margin-top:0}.section-head{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:.25rem 1rem;display:flex}.stats{grid-template-columns:repeat(auto-fit,minmax(min(100%,12rem),1fr));gap:1rem;margin:1.25rem 0;display:grid}.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1rem 1.15rem}.stat b{letter-spacing:-.03em;color:var(--accent);font-size:2rem;font-weight:800;line-height:1.1;display:block}.stat span{color:var(--muted);font-size:.9rem}.shapes{grid-template-columns:repeat(auto-fill,minmax(7.5rem,1fr));gap:.75rem;margin:1.25rem 0;padding:0;list-style:none;display:grid}.shapes li{background:var(--surface);border:1px solid var(--border);text-align:center;border-radius:14px;margin:0;padding:.8rem .6rem .7rem;font-size:.85rem;font-weight:600;line-height:1.3}.shapes svg{width:4rem;height:auto;margin:0 auto .4rem;display:block}.shapes small{color:var(--muted);font-weight:500;display:block}.steps{counter-reset:step;padding:0;list-style:none}.steps>li{counter-increment:step;margin-bottom:1rem;padding-left:2.75rem;position:relative}.steps>li:before{content:counter(step);width:1.9rem;height:1.9rem;color:var(--on-accent);background:var(--accent);border-radius:50%;place-items:center;font-size:.9rem;font-weight:800;display:grid;position:absolute;top:0;left:0}.related{margin-top:3rem}.related h2{font-size:1.2rem}.related .cards{grid-template-columns:repeat(auto-fit,minmax(min(100%,14rem),1fr))}.related a.card{padding:.9rem 1rem}.related a.card h3{margin:0;font-size:.98rem}.faq h3{margin-top:1.4rem}footer.site{border-top:1px solid var(--border);background:var(--surface);color:var(--muted);padding:2rem 0 2.5rem;font-size:.88rem}footer.site .wrap{max-width:var(--wide)}footer.site nav{flex-wrap:wrap;gap:.5rem 1.25rem;margin:.75rem 0;display:flex}footer.site a{color:var(--muted)}footer.site .brand{font-size:.98rem}td.tnum{font-variant-numeric:tabular-nums;min-width:6rem}figure.photo{margin:1.75rem 0}figure.photo picture,figure.photo img{width:100%;height:auto;display:block}figure.photo img{aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius);background:var(--surface-2)}figure.photo .credit{font-size:.78rem}figure.photo .credit a{color:var(--muted)}.feature{background:var(--surface);border:1px solid var(--border);border-radius:calc(var(--radius) + 6px);box-shadow:var(--shadow);align-items:center;gap:1.25rem 2rem;padding:1rem;display:grid}.feature figure.photo{margin:0}.feature h2{margin-top:0}@media (width>=760px){.feature{grid-template-columns:1fr 1fr;padding:1.25rem 2rem 1.25rem 1.25rem}.feature figure.photo img{aspect-ratio:4/3}}
