@layer base{:root{--background:#f6f4ef;--surface:#fffdfa;--alternate:#ece9e0;--text:#253638;--muted:#596764;--accent:#a7452f;--hover:#893720;--teal:#2c605b;--border:#d9ded5;--info:#fff0db;--shadow:0 12px 35px #25363809;--max:1200px;--padding:clamp(16px,4vw,40px)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{background:var(--background);color:var(--text);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.65}a{color:inherit;text-underline-offset:4px}button,input,select{font:inherit}button,summary,select{cursor:pointer}button{border:0}img,svg{max-width:100%}h1,h2,h3,p{margin-top:0}h1{letter-spacing:-.045em;margin-bottom:24px;font-size:clamp(2.1rem,4.8vw,3.7rem);line-height:1.1}h2{letter-spacing:-.025em;font-size:clamp(1.35rem,2.3vw,1.9rem);line-height:1.25}h3{font-size:1.22rem;line-height:1.3}p{margin-bottom:1.2rem}small{font-size:.8rem}a,button,summary,input,select{touch-action:manipulation}:focus-visible{outline:3px solid var(--teal);outline-offset:4px}button:disabled{cursor:default}[hidden]{display:none!important}.container{max-width:var(--max);padding-inline:var(--padding);margin-inline:auto}.muted{color:var(--muted)}.eyebrow{text-transform:uppercase;letter-spacing:.15em;color:var(--accent);margin-bottom:12px;font-size:.72rem;font-weight:750}.lead{color:var(--muted);max-width:760px;font-size:clamp(1rem,1.6vw,1.16rem);line-height:1.7}.skip{background:var(--surface);z-index:10;padding:12px;position:fixed;top:-100px;left:10px}.skip:focus{top:10px}}@layer components{.brand:has(.wordmark){white-space:nowrap;flex-shrink:0}.wordmark{line-height:1;display:grid}.wordmark-main{letter-spacing:-.03em;color:var(--text);font-size:1.05rem;font-weight:760}.wordmark-meta{letter-spacing:.15em;color:var(--muted);align-items:center;gap:6px;margin-top:6px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.58rem;font-weight:650;display:flex}.wordmark-lab{color:var(--accent)}.footer .wordmark-main{color:#eef0e8}.footer .wordmark-meta{color:#c7d1c8}.footer .wordmark-lab{color:#d9c5b2}.header{background:var(--surface);border-bottom:1px solid var(--border)}.header-inner{justify-content:space-between;align-items:center;gap:20px;height:94px;display:flex}.brand{letter-spacing:-.02em;align-items:center;gap:12px;font-size:1.12rem;font-weight:760;line-height:1.1;text-decoration:none;display:inline-flex}.brand-sub{color:var(--muted);letter-spacing:.025em;margin-top:6px;font-size:.82rem;font-weight:500;display:block}.nav-menu{position:relative}.nav-menu>summary{border:1px solid var(--border);border-radius:9px;align-items:center;gap:12px;padding:12px 16px;font-size:.9rem;font-weight:650;list-style:none;display:flex}.nav-menu>summary::-webkit-details-marker{display:none}.nav-menu[open]>summary{background:var(--alternate)}.nav-menu nav{background:var(--surface);border:1px solid var(--border);z-index:5;border-radius:16px;grid-template-columns:1.2fr 1fr 1fr;gap:20px;width:660px;max-width:calc(100vw - 32px);padding:25px;display:grid;position:absolute;top:58px;right:0;box-shadow:0 20px 80px #182a3326}.nav-menu .nav-group-label{color:var(--accent);text-transform:uppercase;letter-spacing:.06em;font-size:.72rem}.nav-menu nav a{padding:6px 0;font-size:.8rem;line-height:1.5;text-decoration:none;display:block}.nav-menu nav a:hover{color:var(--accent)}.hero{grid-template-columns:1.2fr .8fr;align-items:center;gap:50px;padding:65px 0 40px;display:grid}.hero h1{font-size:clamp(2.6rem,5.2vw,4rem)}.hero-visual{background:linear-gradient(135deg,#eeece3,#e2e8df);border:1px solid #d4dacd;border-radius:22px;padding:30px 24px 18px;position:relative}.drawing-label{letter-spacing:.06em;color:var(--muted);font-family:ui-monospace,monospace;font-size:.66rem}.drawing-label.bottom{text-align:right;border-top:1px solid #cbd4c6;padding-top:12px;display:block}.trust-row{color:var(--muted);flex-wrap:wrap;gap:10px 24px;margin-top:22px;font-size:.75rem;font-weight:600;display:flex}.trust-row span:before{content:"✓";color:var(--teal);margin-right:6px}.button{background:linear-gradient(120deg,var(--accent),#933821);color:#fff;border-radius:9px;justify-content:center;align-items:center;gap:18px;padding:14px 23px;font-size:.9rem;font-weight:700;text-decoration:none;transition:transform .15s,background .15s;display:inline-flex;box-shadow:0 4px 12px #a7452f18}.button:hover{background:var(--hover);transform:translateY(-1px)}.button.secondary{background:var(--surface);color:var(--text);border:1px solid var(--border);box-shadow:none}.principles{border-top:1px solid var(--border);border-bottom:1px solid var(--border);grid-template-columns:repeat(3,1fr);gap:35px;padding:24px 0 30px;display:grid}.principles p{color:var(--muted);margin:0;font-size:.85rem}.principles strong{color:var(--text);margin-bottom:5px;display:block}.tool-group{padding-top:45px}.section-heading{justify-content:space-between;align-items:end;gap:15px;margin-bottom:25px;display:flex}.section-heading h2{margin:0}.section-heading>span{color:var(--muted);font-size:.75rem}.tool-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;display:grid}.tool-card{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:15px;flex-direction:column;padding:27px;text-decoration:none;transition:transform .16s,border-color .16s;display:flex;position:relative;overflow:hidden}.tool-card:before{content:"";background:linear-gradient(90deg,#a7452f80,#2c605b30);height:3px;position:absolute;top:0;left:0;right:0}.tool-card:hover{border-color:#a7452f60;transform:translateY(-3px)}.card-icon{width:46px;height:46px;color:var(--accent);background:#f3e9df;border-radius:11px;margin-bottom:22px;padding:7px}.card-icon svg{fill:none;stroke:currentColor;stroke-width:1.5px}.tool-card p{color:var(--muted);margin-bottom:25px;font-size:.86rem;line-height:1.65}.card-cta{border-top:1px solid var(--border);color:var(--accent);justify-content:space-between;margin-top:auto;padding-top:18px;font-size:.8rem;font-weight:700;display:flex}.method-banner{background:#e7ece3;border-radius:18px;justify-content:space-between;align-items:center;gap:30px;margin:55px 0;padding:34px;display:flex}.method-banner h2{max-width:560px}.method-banner p:last-child{color:var(--muted);margin:0;font-size:.9rem}.method-banner .button{flex-shrink:0}.breadcrumbs{color:var(--muted);flex-wrap:wrap;gap:10px;padding-top:27px;font-size:.75rem;display:flex}.breadcrumbs a{text-decoration:none}.page-intro{padding:30px 0 24px}.page-intro h1{margin-bottom:18px;font-size:clamp(2.1rem,4vw,3.2rem)}.workspace{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);align-items:start;gap:24px;display:grid}.input-card{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:17px;padding:28px}.panel-heading{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:24px;display:flex}.panel-heading h2{margin:0;font-size:1.2rem}.pill{letter-spacing:.01em;color:#39584c;background:#edf1e9;border-radius:30px;padding:4px 9px;font-size:.64rem}.fields{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.field{min-width:0}.field label,.mode-field label{margin-bottom:8px;font-size:.8rem;font-weight:650;line-height:1.5;display:block}.optional{color:var(--muted);font-size:.7rem;font-weight:400}.input-group{min-width:0;display:flex}.input-group input,.input-group select,.mode-field select{border:1px solid var(--border);width:100%;min-width:0;color:var(--text);background:#fff;border-radius:8px;height:47px;padding:11px 10px;font-size:.94rem;line-height:1.5}.input-group:has(.unit) input{border-radius:8px 0 0 8px}.input-group .unit{background:#f0f2eb;border-left:0;border-radius:0 8px 8px 0;flex-shrink:0;width:72px;padding-inline:7px;font-size:.8rem}.field small{color:var(--muted);margin-top:7px;font-size:.72rem;line-height:1.6;display:block}.input-group input[type=checkbox]{width:23px;height:23px;accent-color:var(--teal)}.mode-field{margin-bottom:22px}.mode-field select{background:#f1f3ed;font-weight:600}.advanced{border-top:1px solid var(--border);border-bottom:1px solid var(--border);margin-top:24px;padding:15px 0}.advanced>summary{font-size:.84rem;font-weight:650}.advanced>summary span{color:var(--muted);padding-left:17px;font-size:.7rem;font-weight:400;display:block}.advanced[open] .fields{padding-top:20px}.form-actions{align-items:center;gap:20px;padding-top:23px;display:flex}.form-actions .button{flex:1}.text-button{color:var(--muted);background:0 0;padding:10px 0;font-size:.8rem}.quick-example{color:var(--muted);margin-top:22px;font-size:.75rem}.example-button{color:var(--teal);background:#eef0e8;border:1px solid #d3dccf;border-radius:6px;margin-left:8px;padding:6px 10px;font-size:.72rem;font-weight:650}.quick-example small{margin-top:8px;font-size:.67rem;display:block}.error{border-left:3px solid var(--accent);color:#813423;background:#fff0e8;margin-top:18px;padding:12px;font-size:.85rem}.result-card{background:linear-gradient(145deg,#e7ece3,#eef0e8);border:1px solid #d2dbcd;border-radius:17px;min-width:0;padding:28px}.result-card>.eyebrow{color:var(--teal)}.diagram{color:var(--teal);text-align:center;margin:0 0 20px}.diagram svg{width:100%;max-width:340px;margin:auto;display:block;overflow:visible}.diagram text{fill:var(--text);font:12px ui-monospace,monospace}.diagram-face{fill:#d8dfcd;stroke:var(--teal);stroke-width:1.6px;stroke-linejoin:round}.diagram-side{fill:#b6c6ae;stroke:var(--teal);stroke-width:1.6px;stroke-linejoin:round}.dimension{stroke:var(--teal);stroke-width:1px;fill:none}.diagram figcaption{color:var(--muted);max-width:300px;margin:10px auto 0;font-size:.7rem}.result-card [data-empty] h2{font-size:1.25rem}.result-card [data-empty] p{color:var(--muted);margin-bottom:0;font-size:.85rem}.result-label{color:#466056;margin:18px 0 4px;font-size:.8rem;font-weight:600}.primary-result{letter-spacing:-.045em;overflow-wrap:anywhere;margin-bottom:25px;font-size:clamp(2rem,4vw,3.15rem);font-weight:760;line-height:1.2}.result-metrics{margin:0 0 23px}.result-metrics>div{border-top:1px solid #cfd8c8;justify-content:space-between;gap:18px;padding:10px 0;font-size:.79rem;display:flex}.result-metrics dt{color:var(--muted)}.result-metrics dd{text-align:right;overflow-wrap:anywhere;min-width:0;margin:0;font-weight:650}.copy-button{background:var(--surface);color:var(--teal);border:1px solid #ccd6c6;border-radius:7px;padding:9px 14px;font-size:.76rem;font-weight:650}.copy-status{margin:7px;font-size:.7rem;display:inline-block}.calculation{border-top:1px solid var(--border);margin-top:20px;padding-top:15px;font-size:.8rem}.calculation summary{font-weight:650}.calculation p{color:var(--muted);overflow-wrap:anywhere;margin-top:15px}.result-note{color:var(--muted);border-top:1px solid #cfd8c8;margin:20px 0 0;padding-top:17px;font-size:.73rem}.content-grid{grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:60px;padding-top:35px;display:grid}.content-section{border-bottom:1px solid var(--border);padding:30px 0}.content-section p,.content-section li{color:var(--muted);font-size:.9rem}.how-list{padding-left:24px}.how-list li{padding:6px 0 6px 10px}.how-list 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(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}.desktop-nav{align-items:center;gap:10px;display:none}.header .brand{white-space:nowrap;flex-shrink:0}.nav-menu>summary{color:var(--accent);background:#f3e9df;border-color:#dfd4c7}.nav-menu>summary:hover{background:#eee0d3}.nav-menu[open]>summary{background:#eadbcb;border-color:#cba995}.category-menu nav{width:285px;padding:18px;display:block;top:52px}.category-menu nav a{border-radius:6px;padding:9px 7px}.category-menu nav a:hover{background:var(--alternate)}@media (width>=1100px){.desktop-nav{display:flex}.mobile-nav{display:none}.category-menu>summary{gap:9px;padding:11px 12px;font-size:.79rem}.category-menu:first-child nav{left:0;right:auto}}}.nav-icon{color:currentColor;vertical-align:middle;flex:0 0 18px;width:18px;height:18px}.header .nav-menu nav a{align-items:center;gap:9px;display:flex}.header .mobile-nav .nav-group-label{align-items:center;gap:8px;display:flex}.header .category-menu>summary{gap:7px}.header .nav-menu nav a .nav-icon{color:var(--accent)}.nav-group-label{margin:0 0 .83em;font-weight:700;line-height:1.25}.contact-email{min-height:48px;font:inherit;line-height:inherit;margin-top:16px;position:relative}.contact-email [data-contact-result]{display:block}.contact-email [data-contact-result] a{font:inherit;line-height:inherit;color:var(--accent);overflow-wrap:anywhere;text-underline-offset:4px}.contact-email [data-contact-result] a:hover{color:var(--hover)}.contact-email .secondary{font:inherit;background:var(--alternate);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:10px 16px}.contact-email .secondary:hover{background:var(--border)}.visually-hidden{clip:rect(0,0,0,0);clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}