:root{--ink:#1c292c;--muted:#546266;--line:#d6dcda;--paper:#fff;--accent:#264d56}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:25px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.65}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:5px}a:hover{text-decoration-thickness:2px}a:focus-visible,summary:focus-visible{outline:3px solid #af6927;outline-offset:5px}p{margin:0 0 1.2em}h1,h2,h3{margin:0;font-weight:400;line-height:1.06}h1,h2{font-family:Georgia,'Times New Roman',serif;letter-spacing:-.045em}h1{font-size:clamp(3.7rem,6.6vw,7rem)}h2{font-size:clamp(2.5rem,4.1vw,4.3rem)}h3{font-size:1.25rem;line-height:1.3;font-weight:600;letter-spacing:-.025em;margin-bottom:.65rem}img{max-width:100%;display:block;height:auto}figure{margin:0}.header{max-width:1440px;margin:auto;padding:25px 4.5%;display:flex;align-items:center;justify-content:space-between;gap:30px;border-bottom:1px solid var(--line)}.brand{font-size:1.7rem;font-family:Georgia,serif;text-decoration:none;white-space:nowrap;letter-spacing:-.04em}.brand span{font-family:Arial,sans-serif;font-size:.8rem;letter-spacing:.06em;margin-left:8px}.header nav{display:flex;gap:30px;align-items:center}.header nav a{font-size:.9rem;text-decoration:none;padding:10px 0}.edition,.eyebrow{font-size:.75rem;letter-spacing:.16em;font-weight:600}.eyebrow{margin:0 0 25px}.edition{color:var(--muted)}.hero{max-width:1440px;margin:auto;display:grid;grid-template-columns:43% 57%;align-items:center}.hero-text{padding:65px 10.5%}.intro{font-size:1.12rem;max-width:450px;line-height:1.65;margin:28px 0}.text-link{display:inline-flex;align-items:center;min-height:48px}.hero-photo{padding:35px 6% 35px 0}.hero-photo img{width:100%;object-fit:contain}.hero-photo figcaption{font-size:.8rem;color:var(--muted);margin-top:14px}.product-intro,.guide,.buying{display:grid;grid-template-columns:1fr 1fr;gap:8%;padding:75px 0;max-width:1160px;margin:0 auto}.product-intro>div>p{font-size:1.125rem}.offer{border-top:1px solid var(--line);padding-top:20px;margin-top:25px;display:flex;align-items:center;justify-content:space-between;gap:22px}.price{font-family:Georgia,serif;font-size:2.3rem;line-height:1.3;margin:3px 0}.price span{font-family:Arial,sans-serif;font-size:.9rem}.button{background:var(--accent);color:#fff;display:inline-flex;min-height:52px;align-items:center;justify-content:center;padding:13px 24px;text-decoration:none;font-size:.95rem;font-weight:600;text-align:center}.button:hover{background:#163a43}.price-note{font-size:.78rem!important;color:var(--muted);line-height:1.6;margin:12px 0 0!important}.small{font-size:.82rem;color:var(--muted);line-height:1.6}.spec-section{max-width:1160px;margin:auto;padding-bottom:50px;border-bottom:1px solid var(--line)}.facts{display:grid;grid-template-columns:repeat(3,1fr);margin:0 0 18px;gap:0 32px}.facts>div{padding:18px 0;border-top:1px solid var(--line)}dt{font-size:.82rem;color:var(--muted)}dd{margin:5px 0 0;font-size:1rem}.guide{padding-top:75px;border-bottom:1px solid var(--line)}.guide-body article+article{margin-top:32px}.guide-body p{color:var(--muted);margin:0}.faq{max-width:1160px;margin:auto;padding:70px 0}.faq h2{margin-bottom:30px}.faq details{border-top:1px solid var(--line)}.faq details:last-child{border-bottom:1px solid var(--line)}summary{cursor:pointer;font-size:1.1rem;padding:21px 35px 21px 0;line-height:1.4}details p{max-width:760px;color:var(--muted);padding:0 0 15px}.buying{max-width:none;margin:0;padding:70px max(4.5%,calc((100% - 1160px)/2));background:#edf1f1}.buying h2{margin-bottom:30px}.buying-body h3:not(:first-child){margin-top:28px}.buying-body .small{margin-top:14px}.mask{--ink:#142d46;--accent:#15374f;--muted:#586975;--line:#d3dce2}.mask .hero{grid-template-columns:55% 45%}.mask .hero-text{padding:55px 8.2%}.mask h1{font-family:Arial,Helvetica,sans-serif;font-weight:600;font-size:clamp(3.7rem,5.4vw,6rem);letter-spacing:-.06em;line-height:1.02}.mask .hero-photo{padding:32px 12% 32px 3%}.mask .hero-photo img{height:570px;object-fit:contain}.mask .hero-photo figcaption{text-align:center}.mask .eyebrow{color:#9a4b28}.mask .variant{font-size:.85rem;border-left:2px solid #9a4b28;padding-left:14px}.mask .offer{max-width:470px}.mask .price-note{max-width:470px}.mask .product-intro{border-top:1px solid var(--line)}.mask .buying{background:#142d46;color:#fff}.mask .buying .eyebrow{color:#e7af83}.mask .buying .small{color:#c5d1dc}.mask .buying .button{background:#fff;color:#142d46}footer{max-width:1440px;padding:48px 4.5%;margin:auto;display:grid;grid-template-columns:1fr 2fr 1fr;gap:40px}footer nav{display:flex;flex-direction:column;align-items:flex-start;gap:12px;font-size:.85rem}.footer-copy p{font-size:.82rem;color:var(--muted)}.legal{max-width:790px;padding:70px 25px 90px;margin:auto}.legal h1{margin-bottom:40px;font-size:clamp(3rem,6vw,5rem)}.legal h2{font-size:2rem;margin:35px 0 18px}.skip{position:absolute;left:20px;top:-100px;background:#fff;color:#000;padding:12px;z-index:5}.skip:focus{top:10px}@media(min-width:1441px){}@media(max-width:1250px){.product-intro,.spec-section,.guide,.faq{margin-left:5%;margin-right:5%}.edition{display:none}.hero-text{padding:45px 10%}.offer{flex-wrap:wrap}.mask .hero-photo img{height:520px}}@media(max-width:760px){.header{padding:16px 5%;gap:20px;flex-wrap:wrap}.brand{font-size:1.5rem}.header nav{gap:18px}.header nav a{font-size:.8rem}.header nav a:first-child{display:none}.hero,.mask .hero{grid-template-columns:1fr}.hero-text,.mask .hero-text{padding:42px 6% 35px}h1,.mask h1{font-size:clamp(3.2rem,12vw,5rem)}.intro{font-size:1.05rem;max-width:none;margin:22px 0}.hero-photo,.mask .hero-photo{padding:0 6% 30px}.mask .hero-photo img{height:360px}.product-intro,.guide,.buying{grid-template-columns:1fr;gap:28px;padding-top:45px;padding-bottom:45px}.product-intro,.spec-section,.guide,.faq{margin-left:6%;margin-right:6%}.facts{grid-template-columns:1fr 1fr;gap:0 20px}.offer{flex-wrap:nowrap;align-items:center}.offer .button{padding:13px 16px;font-size:.875rem}.price{font-size:2rem}.faq{padding:45px 0}.buying{padding-left:6%;padding-right:6%}footer{grid-template-columns:1fr;gap:20px;padding:35px 6%}footer nav{flex-direction:row;gap:28px}.legal{padding-top:45px}.spec-section{padding-bottom:25px}}@media(max-width:360px){.offer{flex-wrap:wrap}.offer .button{width:100%}.header nav{gap:12px}.facts{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Mask guide: specification table, sequential display notes and open answers. */
.specification-table{width:100%;border-collapse:collapse;text-align:left;margin-bottom:20px}.specification-table caption{text-align:left;font-size:1.25rem;font-weight:600;margin-bottom:18px}.specification-table th,.specification-table td{border-top:1px solid var(--line);padding:14px 0;vertical-align:top}.specification-table th{width:42%;font-weight:400;color:var(--muted)}.display-steps{list-style:decimal-leading-zero;margin:0;padding-left:2.2rem}.display-steps li{padding-left:14px;margin-bottom:30px}.display-steps li::marker{color:#9a4b28;font-size:.9rem}.display-steps p{color:var(--muted);margin:0}.answers{max-width:1160px;margin:auto;padding:60px 0}.answer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:35px;margin-top:35px}.answer-grid article{border-top:2px solid var(--line);padding-top:22px}.answer-grid p{color:var(--muted)}@media(max-width:1250px){.answers{margin-left:5%;margin-right:5%}}@media(max-width:760px){.answers{margin-left:6%;margin-right:6%;padding:45px 0}.answer-grid{grid-template-columns:1fr;gap:20px}.specification-table th{width:44%;padding-right:20px}}