:root{--paper:#f3efe3;--ink:#263d34;--rust:#b95739;--line:#b9b5a8;--soft:#e8e1d1;--white:#fbf9f2;--serif:Georgia,'Times New Roman',serif;--sans:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--mono:SFMono-Regular,Consolas,monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.62}a{color:inherit}.skip{position:absolute;top:-5rem;left:1rem;background:var(--ink);color:white;padding:.6rem 1rem;z-index:5}.skip:focus{top:1rem}.masthead,footer{display:flex;justify-content:space-between;align-items:center;padding:1.25rem clamp(1.25rem,5vw,5.5rem);border-bottom:1px solid var(--ink)}.wordmark{font:600 1rem var(--serif);text-decoration:none;letter-spacing:.02em}.wordmark span{display:block;font:500 .62rem var(--mono);letter-spacing:.16em;margin-top:.12rem}.masthead nav{display:flex;gap:.4rem}.lang{background:none;border:1px solid transparent;color:var(--ink);font:500 .74rem var(--mono);padding:.4rem .65rem;cursor:pointer}.lang.active,.lang:focus-visible{border-color:var(--ink);outline:none}.hero{padding:clamp(4rem,9vw,8.5rem) clamp(1.25rem,10vw,10rem) 2.2rem;max-width:1500px;margin:auto}.overline,.eyebrow,.guide-number,.index,.method-index{font:500 .68rem var(--mono);letter-spacing:.09em}.overline{color:var(--rust);margin-bottom:1.5rem}.hero-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(220px,.55fr);gap:4rem;align-items:end}.hero h1{font:400 clamp(3.2rem,7.7vw,7.8rem)/.91 var(--serif);letter-spacing:-.055em;margin:0}.hero h1 em{color:var(--rust);font-weight:400}.hero-note{max-width:300px;padding:0 0 .45rem 1.4rem;border-left:1px solid var(--rust)}.index{color:var(--rust)}.hero-note p{margin:.7rem 0 0;font-size:1.06rem}.hero-rule{margin-top:clamp(3.5rem,7vw,7rem);padding-top:.8rem;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:var(--ink);gap:1rem;font:500 .8rem var(--mono);letter-spacing:.06em}.guides{max-width:1500px;margin:auto;padding:0 clamp(1.25rem,10vw,10rem)}.guide{border-top:1px solid var(--ink);padding:1rem 0 clamp(4.5rem,9vw,8rem);scroll-margin-top:2rem}.guide-number{color:var(--rust);padding:.45rem 0 1.8rem}.guide-grid{display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:clamp(2rem,7vw,8rem)}.guide-copy{max-width:780px}.eyebrow{color:var(--rust);margin:0 0 .8rem}.guide h2{font:500 clamp(2.3rem,4.5vw,4.5rem)/.98 var(--serif);letter-spacing:-.035em;margin:0 0 1.3rem;max-width:850px}.problem{font:400 clamp(1.35rem,2.2vw,2rem)/1.25 var(--serif);max-width:720px;margin:0 0 2.2rem}.guide h3{font:600 .76rem var(--mono);letter-spacing:.04em;text-transform:uppercase;margin:1.9rem 0 .5rem}.guide-copy>p:not(.eyebrow):not(.problem):not(.status){max-width:650px;margin:.45rem 0}.diagram-wrap{margin:2.1rem 0 2.4rem;background:var(--soft);padding:1.1rem 1.3rem 1rem;max-width:650px;position:relative}.diagram{display:block;width:100%;height:auto;min-height:104px}.diagram-wrap>span{font:500 .78rem var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--ink)}.checkline{border-top:1px solid var(--line);padding-top:.8rem!important;margin-top:2rem!important}.checkline strong{font-weight:600}.buy-link{display:inline-flex;gap:1rem;align-items:center;margin-top:1.2rem;padding:.78rem 1rem;background:var(--ink);color:var(--white);text-decoration:none;font-weight:600}.buy-link:hover{background:var(--rust)}.buy-link:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid var(--rust);outline-offset:3px}.status{display:inline-block;letter-spacing:0;color:var(--ink);background:var(--soft);padding:.45rem .65rem;font-size:.9rem;margin-top:.8rem!important}.source-note{align-self:start;border-left:1px solid var(--line);padding-left:1rem}.source-note h3{margin:0 0 .8rem}.source-note ul{margin:0;padding-left:1rem;font-size:.87rem;line-height:1.4}.source-note li{margin:.65rem 0;overflow-wrap:anywhere}.source-note li a{text-decoration-thickness:1px;text-underline-offset:2px}.checked{font:500 .68rem var(--mono);letter-spacing:.02em;color:#526157;margin:1.2rem 0}.disclosure{border-top:1px solid var(--line);padding-top:.8rem;font-size:.85rem;font-weight:600}.method{max-width:1500px;margin:0 auto;padding:2rem clamp(1.25rem,10vw,10rem) 6rem;border-top:1px solid var(--ink);display:grid;grid-template-columns:230px 1fr;gap:clamp(2rem,7vw,8rem)}.method-index{color:var(--rust);padding-top:.4rem}.method h2{font:500 clamp(2rem,3.2vw,3.3rem)/1 var(--serif);margin:0 0 1rem}.method p{max-width:760px;margin:0}footer{border-top:1px solid var(--ink);border-bottom:0;align-items:flex-end;gap:1rem}footer p{margin:0;font-size:.9rem}footer>a:last-child{font:500 .7rem var(--mono);text-decoration:none;white-space:nowrap}.es-only{display:none} @media(max-width:760px){.hero-grid,.guide-grid,.method{grid-template-columns:1fr}.hero-grid{gap:2rem}.hero-note{max-width:480px}.hero{padding-top:4.5rem}.hero-rule{align-items:flex-start;flex-direction:column;gap:.45rem}.guide-grid{gap:2rem}.source-note{max-width:600px}.method{gap:1.1rem}.method-index{padding-top:0}footer{align-items:flex-start;flex-direction:column}.source-note{border-left:0;border-top:1px solid var(--line);padding:1rem 0 0}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.origin-note{display:inline-block;background:var(--soft);padding:.2rem .55rem;font-size:.92rem}
.amazon-note{max-width:280px;font-size:.85rem;font-weight:600}
.guide[hidden]{display:none!important}