:root{--paper:#fff;--ink:#18213a;--muted:#586174;--accent:#243b70;--accent2:#e4ca72;--line:#d7dbe3;--surface:#f4f6f9}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);margin:0;font:16px/1.65 Segoe UI,Arial,sans-serif}a{color:inherit}.site-header{border-bottom:1px solid var(--line);background:var(--paper);justify-content:space-between;align-items:center;gap:24px;padding:20px clamp(18px,4vw,60px);display:flex}.brand{white-space:nowrap;font:700 1.65rem Georgia,serif;text-decoration:none}.brand span{color:var(--accent)}nav{flex-wrap:wrap;gap:15px;display:flex}nav a{font-size:.86rem;font-weight:650;text-decoration:none}nav a:hover{text-decoration:underline}.button{background:var(--accent);color:#fff;cursor:pointer;border:0;border-radius:2px;justify-content:center;align-items:center;padding:13px 22px;font:700 1rem Segoe UI,Arial;text-decoration:none;display:inline-flex}.button.secondary{background:var(--accent2);color:var(--ink)}.text-link{font-weight:700}.home-intro h1,.tool-intro h1,.article h1{letter-spacing:-.045em;margin:0 0 25px;font:400 clamp(2.8rem,6vw,6rem)/1.02 Georgia,serif}.home-intro p{max-width:60ch;font-size:1.15rem}.home-actions,.form-actions{flex-wrap:wrap;align-items:center;gap:20px;margin-top:32px;display:flex}.home-section{padding:60px clamp(18px,4vw,60px)}.home-section h2,.planner-preview h2{margin:0 0 24px;font:400 clamp(2.1rem,4vw,3.7rem)/1.1 Georgia,serif}.topic-list,.guide-shelf{grid-template-columns:repeat(2,1fr);gap:0 30px;display:grid}.topic-tab,.guide-card{border-top:1px solid var(--line);padding:20px 0;text-decoration:none;display:block}.topic-tab span,.guide-card a{font-weight:700;text-decoration:none}.topic-tab p,.guide-card p{color:var(--muted);margin:7px 0 0}.planner-preview{background:var(--accent);color:#fff;grid-template-columns:1fr .7fr;gap:30px;padding:60px clamp(18px,4vw,60px);display:grid}.planner-preview p{max-width:650px}.planner-preview ol{align-self:center;font-size:1.15rem}.planner-preview li{margin:8px 0}.article-shell{grid-template-columns:minmax(140px,.25fr) minmax(0,800px);gap:clamp(20px,5vw,80px);max-width:1260px;margin:48px auto 90px;padding:0 22px;display:grid}.article-side{border-right:1px solid var(--line);padding:12px 25px 0 0;font-size:.9rem}.article-side a{margin:14px 0;text-decoration:none;display:block}.article{min-width:0}.article h1{font-size:clamp(2.5rem,5vw,4.6rem)}.article h2{margin-top:36px;font:400 1.65rem Georgia,serif}.article p{max-width:76ch}.breadcrumb{font-size:.87rem}.lede{color:var(--muted);font-size:1.14rem}.review-status,.source-box{border-top:2px solid var(--accent);margin:28px 0;padding:18px 0}.related>div,.signal-grid{grid-template-columns:1fr 1fr;gap:16px;display:grid}.tool-intro,.sorter-form,.results{max-width:990px;margin-left:auto;margin-right:auto;padding-left:22px;padding-right:22px}.tool-intro{padding-top:55px}.sorter-form{grid-template-columns:1fr 1fr;gap:24px;display:grid}.sorter-form fieldset{border:1px solid var(--line);background:var(--surface);gap:13px;padding:24px;display:grid}.sorter-form label{gap:8px;font-weight:650;display:grid}.form-actions{grid-column:1/-1}.results{background:var(--surface);margin-top:30px;margin-bottom:80px;padding-top:25px;padding-bottom:25px}.signal-grid article{background:#fff;padding:18px}.signal-grid span{color:var(--muted);display:block}select,input{font:inherit}footer{background:var(--ink);color:#fff;gap:16px;padding:44px clamp(18px,4vw,60px);display:grid}@media (width<=750px){.site-header{flex-direction:column;align-items:flex-start}.topic-list,.guide-shelf,.planner-preview,.article-shell,.sorter-form,.related>div,.signal-grid{grid-template-columns:1fr}.article-side{border-right:0;border-bottom:1px solid var(--line);padding-bottom:12px}.form-actions{grid-column:1}}:root{--paper:#fbfbf7;--ink:#18372f;--green:#24443d;--mid:#608779;--line:#b5c9bf;--rust:#c76542;--wash:#edf3ef}body{background:var(--paper);color:var(--ink);font-family:Arial,Segoe UI,sans-serif}.site-header{background:var(--paper);border-bottom:1px solid var(--line);padding:18px 5%}.site-header .brand{color:var(--green);letter-spacing:-.04em;font:400 1.85rem Georgia,serif}.site-header nav{gap:20px}.site-header nav a{font-size:.9rem;font-weight:500}.button{background:var(--green);color:#fff;border-radius:0;padding:14px 22px;font-weight:600}.button.secondary{color:var(--green);border:1px solid var(--green);background:0 0}h1,h2,h3{font-family:Georgia,serif;font-weight:400}.wrap-hero{border-bottom:1px solid var(--line);grid-template-columns:minmax(0,.9fr) minmax(340px,1fr);align-items:center;gap:6%;padding:52px 5% 58px;display:grid}.wrap-hero h1{letter-spacing:-.055em;max-width:11ch;margin:0 0 22px;font:400 clamp(3.2rem,5vw,5.3rem)/1 Georgia,serif}.wrap-hero p{color:#3e5b51;max-width:40ch;font:1.2rem/1.55 Georgia,serif}.wrap-hero .button{margin-top:16px}.wrap-sheet{aspect-ratio:1.12;background:#eaf1ea;border:1px solid #96b1a4;place-items:center;display:grid;position:relative;overflow:hidden;box-shadow:16px 16px #dae8dc}.wrap-sheet:before{content:"";border:2px dashed #a1b8a9;position:absolute;inset:9%}.wrap-sheet:after{content:"cut line / fold line";color:#648576;font:italic .9rem Georgia,serif;position:absolute;bottom:4%;right:8%}.box-net{grid-template-rows:1fr 1.5fr 1fr;grid-template-columns:1fr 1.35fr 1fr;width:60%;height:60%;display:grid;transform:rotate(-6deg)}.box-net span{background:#fafcf8;border:1px dashed #7ba18e}.box-net span:nth-child(5){border:2px solid var(--green);color:var(--green);background:#d2e3d5;place-items:center;font:italic 1.3rem Georgia,serif;display:grid}.hero-index{color:var(--rust);margin-bottom:18px;font-size:.88rem;font-weight:700}.wrap-tracks{grid-template-columns:repeat(4,1fr);gap:0;padding:34px 5% 48px;display:grid}.wrap-track{border-top:2px solid var(--green);border-right:1px solid var(--line);margin-right:24px;padding:20px 24px 0 0;text-decoration:none}.wrap-track:last-child{border-right:0;margin-right:0}.wrap-track h2{margin:0 0 10px;font:400 2.2rem Georgia,serif}.wrap-track p{color:#49645a;line-height:1.55}.wrap-track strong{color:var(--rust);font-weight:600}.planner-band{background:#dceae1;justify-content:space-between;align-items:center;gap:20px;padding:34px 5%;display:flex}.planner-band h2{margin:0;font-size:2.25rem}.planner-band p{margin:6px 0 0}.site-note{color:#577267;padding:22px 5%;font-size:.88rem}.article-shell{grid-template-columns:190px minmax(0,1fr);gap:60px;width:min(1160px,90%);margin:50px auto;display:grid}.article{box-shadow:none;background:0 0;border:0;border-radius:0;max-width:75ch;padding:0}.article-side{border:0;border-top:2px solid var(--green);background:0 0;padding:18px 0}.article-side a{padding:8px 0;display:block}.article h1{font:400 clamp(2.6rem,4vw,4.2rem)/1.08 Georgia,serif}.article h2{margin:32px 0 10px;font:400 1.8rem Georgia,serif}.article-content p{line-height:1.72}.review-status,.source-box{background:var(--wash);border:0;border-left:3px solid var(--rust);border-radius:0}.guide-card{box-shadow:none;border-radius:0}.tool-intro{width:min(1080px,90%);box-shadow:none;background:0 0;border:0;margin:48px auto 30px;padding:0}.tool-intro h1{margin:0 0 16px;font:400 clamp(3rem,5vw,4.7rem)/1 Georgia,serif}.tool-intro p{color:#4e665d;max-width:70ch}.fit-workspace{grid-template-columns:340px 1fr;gap:36px;width:min(1080px,90%);margin:0 auto 70px;display:grid}.fit-form fieldset{border:1px solid var(--line);gap:15px;padding:22px;display:grid}.fit-form legend{padding:0 7px;font:1.4rem Georgia,serif}.fit-form label{gap:5px;font-weight:600;display:grid}.fit-form input,.fit-form select{width:100%;font:inherit;background:#fff;border:1px solid #668579;padding:11px}.fit-form .form-actions{flex-wrap:wrap;gap:10px;margin-top:16px;display:flex}.fit-result{border:1px solid var(--line);background:#fff;padding:24px;box-shadow:12px 12px #e7eee9}.fit-result h2{margin:0 0 12px;font-size:2rem}.fit-drawing{aspect-ratio:1.4;border:2px solid var(--green);background:repeating-linear-gradient(0deg,#0000,#0000 24px,#d9e6de 25px),repeating-linear-gradient(90deg,#0000,#0000 24px,#d9e6de 25px);place-items:center;display:grid}.fit-drawing .fit-box{border:2px solid var(--rust);text-align:center;background:#fffdf6;place-items:center;width:55%;height:50%;padding:10px;font:italic 1.1rem Georgia,serif;display:grid}.fit-result textarea{border:1px solid var(--line);resize:vertical;width:100%;min-height:140px;margin:16px 0 10px;padding:14px;font:1rem/1.55 Georgia,serif}.fit-result .limit{color:#526b61;font-size:.9rem}footer{background:var(--paper);border-top:1px solid var(--line);color:#536e63;padding:26px 5%}footer nav a{color:#536e63}:focus-visible{outline:3px solid var(--rust);outline-offset:3px}@media (width<=900px){.wrap-hero{grid-template-columns:1fr 1fr;gap:25px}.wrap-tracks{grid-template-columns:repeat(2,1fr);gap:24px}.wrap-track:nth-child(2){border-right:0}.fit-workspace{grid-template-columns:1fr}}@media (width<=650px){.site-header{padding:16px 20px;display:block}.site-header nav{gap:8px 16px;margin-top:12px}.wrap-hero{grid-template-columns:1fr;padding:35px 20px 45px}.wrap-hero h1{font-size:3.55rem}.wrap-sheet{aspect-ratio:1.2;margin:6px 12px 10px 0}.wrap-tracks{grid-template-columns:1fr;gap:22px;padding:28px 20px}.wrap-track,.wrap-track:nth-child(2){border-right:0;border-bottom:1px solid var(--line);margin-right:0;padding-bottom:20px}.planner-band{padding:30px 20px;display:block}.planner-band .button{margin-top:18px}.site-note{padding:20px}.article-shell{width:100%;margin:30px auto;padding:0 20px;display:block}.article-side{display:none}.tool-intro,.fit-workspace{width:100%;padding:0 20px}.fit-result{padding:18px}footer{padding:25px 20px}.site-header nav{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.site-header nav a{min-width:0;font-size:.85rem}.wrap-hero{grid-template-columns:minmax(0,1fr);min-width:0}.wrap-hero .wrap-copy{min-width:0;max-width:100%}.wrap-hero h1{max-width:100%;font-size:clamp(2.65rem,11vw,3.05rem);line-height:1.03}.wrap-hero .wrap-copy p{max-width:100%;font-size:1.06rem}.wrap-sheet{width:calc(100% - 10px);margin:6px 0 10px;box-shadow:8px 8px #dae8dc}}