:root{--forest:#075331;--green:#17763e;--cta:#278a48;--sage:#eaf5e9;--ink:#18191a;--muted:#555b5b;--border:#d8dddf;--paper:#fff;--warm:#f5f2ee;--focus:#126f40;font-family:Arial,"Noto Sans", "Noto Sans CJK KR","Noto Sans Arabic",system-ui,sans-serif;color:var(--ink);background:#fff;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0}button,input,select{font:inherit}button{cursor:pointer}a{color:inherit}img{max-width:100%;height:auto}h1,h2,h3,p{margin-top:0}h2{font-size:1.35rem}h3{font-size:1rem}p{line-height:1.48}small{line-height:1.4}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #c48b20;outline-offset:3px}section{scroll-margin-top:75px}.icon{flex:none;width:22px;height:22px}.site-header{background:#fff;border-bottom:1px solid #e3e4e2;position:relative;z-index:10}.header-inner{max-width:1240px;margin:auto;min-height:52px;padding:6px 20px;display:flex;align-items:center;gap:18px}.brand{display:flex;align-items:center;gap:5px;color:#104e32;text-decoration:none;white-space:nowrap;font-size:1.24rem}.brand img{width:30px;height:30px}.brand-descriptor{border-inline-start:1px solid #c7caca;padding-inline-start:18px;white-space:nowrap;font-size:.78rem}.header-inner nav{display:flex;gap:25px;margin-inline-start:auto;align-self:stretch;align-items:center}.header-inner nav a{text-decoration:none;font-size:.82rem;padding:13px 2px 10px;white-space:nowrap}.header-inner nav a:hover{color:var(--green)}.header-inner nav a:first-child{color:var(--forest);border-bottom:2px solid var(--green)}.language-menu{position:relative;margin-inline-start:auto;min-width:128px;font-size:.8rem}.language-menu summary{display:flex;align-items:center;gap:8px;list-style:none;border:1px solid #cbd0d2;border-radius:7px;padding:8px 9px;cursor:pointer;background:#fff;min-height:38px}.language-menu summary::-webkit-details-marker{display:none}.language-menu summary span:last-child{margin-inline-start:auto}.language-list{position:absolute;top:calc(100% + 5px);inset-inline-end:0;width:max-content;min-width:205px;max-width:calc(100vw - 24px);max-height:min(60vh,390px);overflow-y:auto;border:1px solid #cad0ce;background:#fff;box-shadow:0 10px 30px #17332428;border-radius:7px;padding:4px;z-index:20}.language-list a{display:flex;align-items:center;gap:9px;min-height:36px;padding:6px 8px;text-decoration:none;border-radius:4px}.language-list a:hover,.language-list a[aria-current=page]{background:var(--sage)}.language-list img,.language-menu img{width:20px;height:14px;object-fit:cover;border:1px solid #ddd}
.hero{min-height:138px;background:#f7f4ef url('/assets/images/hero-curtain-room.webp') right center/auto 100% no-repeat}.hero-inner{max-width:1240px;margin:auto;padding:25px 40px 23px;position:relative}.hero-inner:before{content:"";position:absolute;inset:0 35% 0 0;background:linear-gradient(90deg,#faf8f5 60%,#faf8f500);pointer-events:none}.hero-inner>*{position:relative}.hero h1{font-size:clamp(2.05rem,4vw,3rem);line-height:1.04;letter-spacing:-.04em;margin:0 0 5px;max-width:660px}.hero h1 span{color:var(--green)}.hero p{font-size:.91rem;margin:0}.hero .hero-sub{font-size:1.13rem;margin-bottom:4px}.tool-shell,.content-section{max-width:1220px;margin-inline:auto}.tool-shell{margin-top:-1px;padding:12px;display:grid;grid-template-columns:minmax(0,31%) minmax(0,39%) minmax(0,30%);gap:10px;background:#fff;border:1px solid #d9dedc;border-radius:12px;box-shadow:0 6px 26px #1d423410;position:relative}.tool-shell>*{min-width:0}.input-panel{padding:4px 1px}.panel-heading{display:flex;align-items:flex-start;gap:9px;margin:3px 4px 9px}.panel-heading>.icon{width:28px;height:28px}.panel-heading h2,.results-panel h2{font-size:1.2rem;margin:0 0 2px;line-height:1.18}.panel-heading p{font-size:.73rem;color:#4e5553;margin:0}.input-panel form{border:1px solid var(--border);border-radius:9px;padding:12px 10px 10px;box-shadow:0 2px 6px #243e300d}.field-block{border-bottom:1px solid #e2e5e2;padding-bottom:8px;margin-bottom:9px}.field-block label,.style-field legend{display:flex;align-items:center;gap:8px;font-weight:700;font-size:.84rem;margin-bottom:5px}.field-block label .icon,.style-field .icon{width:20px;height:20px}.dimension-field{display:grid;grid-template-columns:minmax(0,1fr) 58px;gap:5px;margin-inline-start:29px}.dimension-field input,.dimension-field select{min-width:0;width:100%;min-height:35px;border:1px solid #bfc8cb;border-radius:5px;background:#fff;padding:4px 8px;font-size:1rem}.dimension-field select{font-size:.84rem;padding:2px 4px}.field-block small{font-size:.68rem;color:#555;display:block;margin:4px 0 0 29px}.error{display:block;color:#a32121;font-size:.75rem;margin:3px 0 0 29px}.error:empty{display:none}input[aria-invalid=true]{border-color:#b00020;outline-color:#b00020}.style-field{border:0;padding:0;margin:0 0 12px}.style-field legend{margin-bottom:7px}.style-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px;margin-inline-start:29px}.style-choice{min-width:0;position:relative;text-align:center;font-size:.8rem;line-height:1.13}.style-choice input{position:absolute;opacity:0;inset:0;cursor:pointer}.style-choice span{display:flex;min-height:44px;flex-direction:column;align-items:center;justify-content:center;gap:1px;border:1px solid #bbc6c8;border-radius:6px;padding:4px 2px;background:#fff;overflow-wrap:anywhere}.style-choice small{font-size:.72rem}.style-choice input:checked+span{background:#e4f4e6;border:2px solid var(--green);color:#075331;font-weight:700}.style-choice input:focus-visible+span{outline:3px solid #c48b20;outline-offset:2px}.calculate-button{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;min-height:45px;border:0;border-radius:6px;background:#278a48;color:#fff;font-size:1.06rem;font-weight:700}.calculate-button:hover{background:#126e38}.calculate-button img{filter:brightness(0) invert(1)}.form-example{font-size:.68rem;color:#555;margin:7px 0 0;line-height:1.35}.visual-panel{position:relative;min-height:360px;border-radius:9px;overflow:hidden;background:#d7d1c1}.visual-photo{display:block;width:100%;height:100%;object-fit:cover;object-position:center}.visual-panel svg{position:absolute;inset:0;width:100%;height:100%;direction:ltr}.measure-line{stroke:#075331;stroke-width:2.2;filter:drop-shadow(0 1px 1px white)}.measure-label rect{fill:#ffffffeb;stroke:#d9e0da;stroke-width:1}.measure-label text{fill:#092d1e;font-size:10px;font-weight:700;text-anchor:middle;direction:ltr}.measure-label text.value{font-size:16px;fill:#075331;font-weight:800}.side-label text{font-size:9px}.side-label text.value{font-size:13px}.results-panel{background:linear-gradient(135deg,#e7f3e9,#eef8ee);border-radius:9px;padding:13px 12px 10px;display:flex;flex-direction:column}.results-panel h2{display:flex;gap:8px;align-items:center;margin:5px 0 14px}.results-panel h2 .icon{width:25px;height:25px}.result-card{border-radius:9px;background:#fff;padding:8px 10px}.metric{display:flex;gap:10px;align-items:center;padding:9px 4px}.metric+.metric{border-top:1px solid #e6e8e7}.metric .icon{width:32px;height:32px}.metric>div{min-width:0}.metric h3{font-size:.84rem;line-height:1.25;margin:0}.metric strong{display:block;color:#0b703a;font-size:clamp(1.65rem,2.6vw,2.15rem);line-height:1.12;white-space:nowrap}.result-meaning{display:flex;gap:7px;background:#dcefdc;border-radius:8px;padding:10px;font-size:.78rem;margin:10px 0 12px}.result-meaning .icon{width:20px;height:20px}.stale{background:#fff2d8;color:#704900;padding:8px;border-radius:5px;font-size:.75rem;margin:9px 0 0}.share-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:auto}.share-actions button{min-height:44px;display:flex;align-items:center;justify-content:center;gap:6px;border:1px solid #829c91;border-radius:6px;background:#fff;font-weight:700;font-size:.83rem;padding:6px;overflow-wrap:anywhere}.share-actions button:hover{background:#f2f8f2}.share-actions .icon{width:18px;height:18px}.feedback{font-size:.75rem;color:#145e36;margin:8px 0 0}.feedback:empty{display:none}#manual-copy{font-size:.75rem;margin-top:6px}#manual-copy input{display:block;width:100%;margin-top:4px;font-size:.78rem;padding:6px;border:1px solid #889}
.content-section{padding:0 8px;margin-top:20px}.section-title{display:flex;align-items:end;gap:18px;flex-wrap:wrap;margin:0 3px 8px}.section-title h2{display:flex;align-items:center;gap:8px;margin:0;font-size:1.42rem}.section-title .icon{width:28px;height:28px}.section-title p{font-size:.83rem;color:#444;margin:0 0 2px}.steps{border:1px solid #d2dbdc;border-radius:9px;padding:17px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.step{display:flex;gap:10px;align-items:flex-start;min-width:0}.step-number{border-radius:100%;background:#2a7d4e;color:#fff;min-width:26px;height:26px;display:grid;place-items:center;font-weight:700}.step h3{font-size:1rem;margin:2px 0 6px}.step p{font-size:.8rem;margin:0}.guide-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.guide-grid article{border:1px solid #d9ddde;border-radius:8px;background:#fafbfa;padding:12px;min-width:0;min-height:205px}.guide-grid h3{display:flex;align-items:center;gap:7px;font-size:.93rem;padding-bottom:8px;border-bottom:1px solid #e3e8e5;margin-bottom:9px}.guide-grid h3 .icon{width:20px;height:20px}.guide-grid p{font-size:.79rem;margin:0 0 8px}.formula-example{background:#e6f3e5;color:#14422b;padding:10px;border-radius:6px;font-weight:700;font-size:.86rem}table{border-collapse:collapse;width:100%;font-size:.78rem}th,td{padding:5px;border:1px solid #d7dfd8;text-align:start}tr:nth-child(2) td{background:#e8f5e8}.length-sketch{display:flex;gap:4px;margin-top:13px}.length-sketch span{flex:1;text-align:center;background:#eee7dd;border-top:4px solid #798b72;padding:19px 2px 4px;font-size:.72rem}.examples-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.example-card{display:flex;gap:10px;border:1px solid #d9ddde;border-radius:8px;padding:7px;min-width:0;min-height:160px}.example-card>img{width:38%;height:145px;object-fit:cover;border-radius:6px;flex:none}.example-card>div{min-width:0}.example-badge{display:inline-block;background:#287e4a;color:#fff;border-radius:4px;padding:3px 8px;font-size:.68rem}.example-card h3{font-size:.87rem;margin:6px 0}.example-card p{font-size:.72rem;margin:4px 0}.example-result{display:block;background:#e6f4e6;color:#104e32;border-radius:4px;font-size:.78rem;padding:4px;margin-top:7px}.faq-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 12px;align-items:start}.faq-list details{border:1px solid #d9ddde;border-radius:7px;min-width:0}.faq-list details:first-child{grid-row:span 5}.faq-list summary{cursor:pointer;padding:8px 10px;font-weight:700;font-size:.85rem;line-height:1.35}.faq-list summary span{color:#075331}.faq-list details[open] summary{background:#edf7ec}.faq-list details p{font-size:.82rem;margin:0;padding:11px}.site-footer{background:#154c3d;color:#fff;margin-top:32px}.footer-inner{max-width:1240px;margin:auto;display:flex;align-items:center;gap:30px;min-height:100px;padding:20px}.footer-brand{display:flex;gap:10px;align-items:start;min-width:190px}.footer-brand img{filter:brightness(0) invert(1)}.footer-brand strong{font-size:1.3rem}.footer-brand small{display:block;font-size:.67rem;max-width:200px}.footer-links{display:flex;flex-wrap:wrap;gap:13px 20px;align-items:center;border-inline-start:1px solid #9bb4a9;padding-inline-start:28px;font-size:.78rem}.footer-links a{text-decoration:none}.footer-links a:hover{text-decoration:underline}.footer-inner>small{margin-inline-start:auto;white-space:nowrap;font-size:.68rem}.legal-page{max-width:900px;margin:30px auto 90px;padding:0 22px;min-height:55vh}.legal-page>a{color:#075331}.legal-page h1{margin-top:24px;font-size:2rem}.legal-page p{font-size:1rem;line-height:1.7;max-width:72ch}
@media(max-width:1100px){.brand-descriptor{display:none}.header-inner nav{gap:14px}.tool-shell{grid-template-columns:minmax(0,31%) minmax(0,38%) minmax(0,31%)}.metric strong{font-size:1.7rem}.result-meaning{font-size:.73rem}.guide-grid h3{font-size:.85rem}.guide-grid p{font-size:.74rem}}
@media(max-width:900px){.header-inner{flex-wrap:wrap}.header-inner nav{order:3;width:100%;justify-content:space-around;margin:0;border-top:1px solid #eee}.language-menu{margin-inline-start:auto}.tool-shell{grid-template-columns:repeat(2,minmax(0,1fr));margin:0 8px}.visual-panel{min-height:380px}.results-panel{grid-column:1/-1}.result-card{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.metric+.metric{border-top:0;border-inline-start:1px solid #e6e8e7}.share-actions{margin-top:8px}.guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.examples-grid{grid-template-columns:1fr}.example-card>img{width:160px}.faq-list{grid-template-columns:1fr}.faq-list details:first-child{grid-row:auto}.footer-inner{flex-wrap:wrap}.footer-inner>small{margin-inline-start:0}}
@media(max-width:650px){.header-inner{padding:8px 14px;gap:7px}.brand{font-size:1.08rem}.brand img{width:27px;height:27px}.language-menu{min-width:115px}.header-inner nav a{font-size:.76rem}.hero{min-height:175px;background-size:auto 100%;background-position:64% center}.hero-inner{padding:22px 18px}.hero-inner:before{inset:0;background:linear-gradient(90deg,#faf8f5f2 0%,#faf8f5e6 65%,#faf8f566 100%)}.hero h1{font-size:2rem}.hero .hero-sub{font-size:1rem}.hero p{font-size:.82rem;max-width:440px}.tool-shell{display:flex;flex-direction:column;padding:9px;margin:0 8px;gap:11px}.input-panel form{padding:12px}.visual-panel{height:min(93vw,470px);min-height:0}.results-panel{min-height:270px}.result-card{display:block}.metric+.metric{border-top:1px solid #e6e8e7;border-inline-start:0}.metric strong{font-size:1.9rem}.content-section{margin-top:22px;padding:0 14px}.steps,.guide-grid{grid-template-columns:1fr}.steps{padding:14px;gap:15px}.guide-grid article{min-height:0}.section-title{align-items:start;gap:3px}.section-title p{width:100%}.example-card>img{width:35%;height:145px}.footer-inner{display:block;padding:24px 18px}.footer-links{border:0;padding:18px 0}.footer-inner>small{display:block}.faq-list details:first-child{grid-row:auto}}
@media(max-width:360px){.brand{font-size:1rem}.language-menu{min-width:104px}.language-menu summary{font-size:.7rem;padding:6px}.header-inner nav{gap:4px}.header-inner nav a{font-size:.69rem}.hero h1{font-size:1.85rem}.dimension-field{margin-inline-start:0}.style-options{margin-inline-start:0}.form-example{font-size:.65rem}.share-actions{gap:5px}.share-actions button{font-size:.75rem}.example-card>img{width:31%}.example-card h3{font-size:.8rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.measure-label{display:none}
.visual-label{position:absolute;z-index:2;background:#fffffff0;border:1px solid #d9e0da;border-radius:7px;padding:3px 7px;box-shadow:0 1px 2px #0002;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.08;min-width:0;overflow-wrap:anywhere}
.visual-label small{font-size:clamp(.53rem,.8vw,.7rem);font-weight:700;line-height:1.1}.visual-label strong{font-size:clamp(.85rem,1.45vw,1.25rem);color:var(--forest);line-height:1.14;white-space:nowrap;direction:ltr;unicode-bidi:isolate}
.visual-label-top{left:50%;top:2%;transform:translateX(-50%);width:44%;min-height:43px}.visual-label-middle{left:50%;top:44%;transform:translateX(-50%);width:34%;min-height:42px}.visual-label-side{left:1%;top:42%;width:23%;min-height:58px}.visual-label-side strong{font-size:clamp(.72rem,1.2vw,1rem)}
[dir=rtl] .visual-label{direction:rtl}
.ad-slot{max-width:1220px;margin:26px auto;padding:7px;border:1px solid #d9ddde;border-radius:7px;text-align:center;color:#59605c;font-size:.72rem;background:#fafafa}.ad-reserved-space{min-height:160px}
.step-illustration{flex:none;width:51px;height:51px;border-radius:50%;background:#eaf1ef;display:grid;place-items:center}.step-illustration .icon{width:34px;height:34px}.step-number{flex:none}.length-sketch span{display:flex;flex-direction:column;align-items:center;justify-content:end;gap:4px;border-top:0;padding:3px 1px 5px;background:#f3eee8}.length-sketch img{max-height:62px;width:auto;object-fit:contain}
@media(max-width:1100px){.step-illustration{width:42px;height:42px}.step-illustration .icon{width:27px;height:27px}.step{gap:6px}}
@media(max-width:650px){.step-illustration{width:37px;height:37px}.step-illustration .icon{width:24px;height:24px}}
.faq-list details:first-child{grid-row:span 6}
@media(max-width:900px){.faq-list details:first-child{grid-row:auto}}
.calculate-button{background:#1c783e}
.sitemap-list{line-height:2.1}.sitemap-list a{color:var(--forest)}
.visual-label small{font-size:.63rem}.visual-label-side{width:26%}
.style-choice span{position:relative}.style-choice input:checked+span:after{content:'';position:absolute;inset-inline-end:3px;bottom:3px;width:14px;height:14px;background:url('/assets/icons/check-filled.svg') center/contain no-repeat}
.step{position:relative}.step:not(:last-child):after{content:'';position:absolute;inset-inline-end:-17px;top:18px;width:24px;height:18px;background:url('/assets/icons/step-arrow.svg') center/contain no-repeat}[dir=rtl] .step:not(:last-child):after{transform:scaleX(-1)}
.tips-list{list-style:none;padding:0;margin:0}.tips-list li{font-size:.74rem;line-height:1.35;position:relative;padding-inline-start:19px;margin:8px 0}.tips-list li:before{content:'';position:absolute;inset-inline-start:0;top:0;width:13px;height:13px;background:url('/assets/icons/check-filled.svg') center/contain no-repeat}
.faq-list summary{list-style:none;display:flex;align-items:center;gap:4px}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:'';margin-inline-start:auto;flex:none;width:17px;height:17px;background:url('/assets/icons/chevron-down.svg') center/contain no-repeat;transition:transform .15s}.faq-list details[open] summary:after{transform:rotate(180deg)}
.site-footer{background:linear-gradient(120deg,#184f40,#124638)}
.language-menu .globe-icon{border:0;width:16px;height:16px}
.language-menu .menu-chevron{border:0;width:16px;height:16px;margin-inline-start:auto;transition:transform .15s}.language-menu[open] .menu-chevron{transform:rotate(180deg)}
@media(max-width:650px){.language-menu .globe-icon{display:none}}
@media(max-width:900px){.step:not(:last-child):after{display:none}}

/* Match the supplied 1024px desktop composition while keeping the existing
   fluid tablet and phone layouts below 900px. */
@media(min-width:901px){
  .header-inner{min-height:42px;padding-block:2px;gap:16px}
  .brand-descriptor{display:inline;font-size:.75rem}
  .header-inner nav{gap:18px}
  .header-inner nav a{padding-block:10px 8px}
  .language-menu summary{min-height:32px;padding-block:5px}
  .hero{min-height:138px;background-position:right center}
  .hero-inner{padding:21px 40px 19px}
  .tool-shell,.content-section{width:calc(100% - 36px)}
  .tool-shell{grid-template-columns:minmax(0,1.08fr) minmax(0,1.36fr) minmax(0,1fr);gap:10px;padding:11px;margin-top:0}
  .panel-heading{margin:2px 4px 8px}
  .input-panel form{padding:8px 8px 7px}
  .field-block{padding-bottom:5px;margin-bottom:6px}
  .field-block label,.style-field legend{margin-bottom:3px}
  .dimension-field input,.dimension-field select{min-height:27px;padding-block:2px}
  .field-block small{font-size:.62rem;line-height:1.22;margin-top:3px}
  .style-field{margin-bottom:8px}
  .style-field legend{margin-bottom:5px}
  .style-choice span{min-height:38px}
  .calculate-button{min-height:38px;background:linear-gradient(105deg,#32984e,#1d7b3e)}
  .form-example{font-size:.58rem;line-height:1.1;margin-top:5px}
  .visual-panel{height:369px;min-height:369px}
  .results-panel{padding:10px 11px 9px}
  .results-panel h2{margin:5px 0 10px}
  .metric{padding:6px 3px}
  .result-meaning{margin:9px 0 10px;padding:8px;font-size:.72rem}
  .share-actions button{min-height:36px}
  .content-section{padding:0;margin-top:18px}
  .section-title{margin:0 3px 7px}
  .steps{padding:12px 16px;gap:15px}
  .step h3{margin:1px 0 4px}
  .step p{font-size:.75rem;line-height:1.25}
  .step-illustration{width:65px;height:65px}
  .step-illustration .icon{width:42px;height:42px}
  .guide-grid{gap:10px}
  .guide-grid article{min-height:196px;padding:9px}
  .guide-grid h3{font-size:.78rem;white-space:nowrap;gap:5px;padding-bottom:6px;margin-bottom:6px}
  .guide-grid h3 .icon{width:19px;height:19px}
  .guide-grid p{font-size:.68rem;line-height:1.28;margin-bottom:6px}
  .guide-grid table{font-size:.66rem}
  .guide-grid th,.guide-grid td{padding:3px}
  .formula-example{padding:7px;font-size:.73rem}
  .length-sketch{margin-top:5px}
  .length-sketch img{max-height:50px}
  .tips-list li{font-size:.67rem;line-height:1.25;margin:5px 0}
  .example-card{min-height:148px;padding:6px;gap:8px}
  .example-card>img{height:134px;width:38%}
  .example-card h3{font-size:.75rem;margin:4px 0}
  .example-card p{font-size:.63rem;line-height:1.2;margin:3px 0}
  .example-result{font-size:.68rem;padding:3px;margin-top:4px}
  .faq-list{gap:3px 10px}
  .faq-list summary{font-size:.75rem;line-height:1.2;padding:5px 9px}
  .faq-list details p{font-size:.73rem;line-height:1.28;padding:8px 10px}
  .faq-list details:first-child{min-height:172px}
  .site-footer{margin-top:30px}
  .footer-inner{min-height:80px;padding-block:13px}
}
@media(min-width:901px) and (max-width:1100px){
  .tool-shell{grid-template-columns:minmax(0,1.08fr) minmax(0,1.36fr) minmax(0,1fr)}
  .step{gap:9px}
}

.faq-style-list{margin:0 10px 10px;padding-inline-start:18px;font-size:.74rem;line-height:1.36}
.faq-style-list li{margin:3px 0}
@media(min-width:901px){
  .header-inner{min-height:41px}
  .hero-inner{padding-block:20px 17px}
  .panel-heading p{font-size:.64rem}
  .panel-heading{margin-bottom:1px}
  .input-panel form{padding-bottom:14px}
  .tool-shell{padding-bottom:8px}
  .metric{padding:4px 3px}
  .metric h3{font-size:.74rem;white-space:nowrap}
  html:not([lang="en"]) .metric h3{white-space:normal}
  .result-card{padding:5px 9px;min-height:143px}
  .result-meaning{padding:11px 8px}
  .share-actions{margin-bottom:25px}
  .visual-label-top{width:136px}
  .visual-label-middle{width:104px}
  .visual-label-side{left:2%;width:58px;min-height:58px}
  #how{margin-top:25px}
  #how .section-title{margin-bottom:0}
  .steps{padding-block:20px}
  #guide{margin-top:23px}
  #examples{margin-top:24px}
  #faq{margin-top:22px}
  .faq-list summary{padding-block:2px;min-height:25px}
  .faq-list summary:after{font-size:1rem;line-height:1}
  .faq-list details:first-child{min-height:172px}
}

/* Purpose-built step illustrations and the four detailed guide cards. */
.step-illustration .icon{display:block;width:72%;height:72%;object-fit:contain}
.formula-list{list-style:none;padding:0;margin:0 0 7px;font-size:.72rem;line-height:1.28}
.formula-list li{position:relative;padding-inline-start:11px;margin:5px 0}
.formula-list li:before{content:'•';position:absolute;inset-inline-start:0;top:-1px;color:#16743c;font-weight:900}
.formula-note{font-size:.68rem}
.formula-example{display:flex;flex-direction:column;gap:3px;background:linear-gradient(110deg,#e4f2e3,#eff8ed);color:#173d27}
.formula-example strong{font-size:.73rem}
.formula-example small{font-size:.65rem;font-weight:400;line-height:1.15}
.formula-example bdi{font-size:.72rem;font-weight:700}
.fullness-card table{table-layout:fixed;background:#fff}
.fullness-card th,.fullness-card td{overflow-wrap:anywhere;vertical-align:middle}
.fullness-card thead th{background:#edf0ef;font-weight:700;text-align:center}
.fullness-card tbody th{font-weight:700;text-align:center}
.fullness-card tbody tr:nth-child(2)>*{background:#e5f4e3}
.fullness-card td:nth-child(2){white-space:nowrap;text-align:center}
.fullness-card th:first-child{width:24%}
.fullness-card th:nth-child(2){width:22%}
.fullness-card th:nth-child(3){width:54%}
.multiplier-symbol{display:none}
.back-link{display:inline-flex;align-items:center;gap:5px}.back-link img{flex:none;width:18px;height:18px}[dir=rtl] .back-link img{transform:scaleX(-1)}
.length-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px}
.length-option{min-width:0;border:1px solid #dfe4e1;border-radius:6px;background:#fff;text-align:center;padding:4px 2px 5px;display:flex;flex-direction:column;align-items:center}
.curtain-thumbnail{display:flex;align-items:flex-start;justify-content:center;width:100%;height:68px;border-radius:3px;background:#f7f4ef;overflow:hidden}
.curtain-thumbnail img{width:auto;max-width:80%;height:55px;object-fit:fill;filter:saturate(.62)}
.length-option.short .curtain-thumbnail img{height:49px}
.length-option.floor .curtain-thumbnail img{height:66px}
.length-option strong{font-size:.64rem;margin:5px 0 3px;line-height:1.1}
.length-option.standard strong{color:#0a6b35}
.length-option small{font-size:.58rem;line-height:1.18;overflow-wrap:anywhere}
@media(min-width:901px){
  .steps{padding:14px 19px}
  .step{gap:12px}
  .step-illustration{width:78px;height:78px}
  .step-illustration .icon{width:72px;height:72px}
  .guide-grid{grid-template-columns:minmax(0,1.03fr) minmax(0,1.05fr) minmax(0,1fr) minmax(0,.89fr)}
  .guide-grid article{min-height:196px}
  html:not([lang="en"]) .guide-grid h3{white-space:normal}
  .formula-list{font-size:.66rem}
  .formula-list{margin-bottom:22px}
  .formula-example{padding:6px 8px;min-height:75px}
  .fullness-card table{font-size:.56rem;line-height:1.12;margin-top:5px}
  .fullness-card th,.fullness-card td{padding:5px 2px}
  .length-option{min-height:142px}
  .curtain-thumbnail img{width:50px;filter:none}
  .length-option.short .curtain-thumbnail img{width:47px}
  .length-option.floor .curtain-thumbnail img{width:52px}
  .tips-card .tips-list{margin-top:8px}
  .tips-card .tips-list li{font-size:.65rem;margin:7px 0}
}
@media(max-width:900px){
  .step-illustration{width:50px;height:50px}
  .step-illustration .icon{width:43px;height:43px}
  .fullness-card table{font-size:.7rem;line-height:1.2}
  .length-option small{font-size:.65rem}
}
@media(max-width:650px){
  .step-illustration{width:46px;height:46px}
  .step-illustration .icon{width:40px;height:40px}
  .guide-grid article{overflow:hidden}
}
@media(max-width:360px){
  .multiplier-text{display:none}
  .multiplier-symbol{display:inline}
}

/* Keep the calculator and its photo in one reading order through tablet-sized phones. */
@media(max-width:767px){
  .tool-shell{display:flex;flex-direction:column;padding:9px;margin:0 8px;gap:11px}
  .input-panel form{padding:12px}
  .visual-panel{height:min(93vw,640px);min-height:0}
  .visual-label-top{top:0;min-height:clamp(28px,5vw,40px)}
  .results-panel{min-height:270px}
  .result-card{display:block}
  .metric+.metric{border-top:1px solid #e6e8e7;border-inline-start:0}
  .metric strong{font-size:1.9rem}
  .steps{grid-template-columns:1fr;gap:15px}
  .header-inner nav a,.language-menu summary,.language-list a{min-height:44px}
  .dimension-field input,.dimension-field select{min-height:44px}
  .faq-list summary{min-height:44px;align-items:center}
  .footer-links a{display:inline-flex;align-items:center;min-height:44px}
}
.visual-label-middle{top:calc(51.5% - 42px)}
@media(min-width:768px) and (max-width:799px){
  .visual-panel svg{transform:scaleX(.9)}
}
@media(min-width:1025px){
  .visual-panel{height:clamp(369px,35vw,440px);min-height:0}
  .visual-label-top{top:0;min-height:40px}
}
@media(max-width:650px){
  .hero{min-height:0}
}
@media(pointer:coarse){
  .header-inner nav a,.language-menu summary,.language-list a{min-height:44px}
  .dimension-field input,.dimension-field select{min-height:44px}
  .faq-list summary{min-height:44px;align-items:center}
  .footer-links a{display:inline-flex;align-items:center;min-height:44px}
}