:root{--ink:#292723;--muted:#666158;--paper:#faf8f3;--line:#e4ded3;--primary:#80543b;--secondary:#596776;--accent:#e6a05f;--soft:#f5ebe1;--footer:#3e342d;--shadow:0 12px 34px rgba(20,30,35,.10);--radius:18px;--max:1480px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);line-height:1.66}a{color:var(--primary);text-underline-offset:3px}a:hover{color:var(--secondary)}img,svg{max-width:100%;height:auto}button,input,select,textarea{font:inherit}.wrap{width:min(var(--max),calc(100% - 32px));margin:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:12px;background:#fff;padding:10px 14px;z-index:1000;border-radius:10px}
.site-header{background:linear-gradient(125deg,var(--footer),var(--primary));color:#fff;box-shadow:0 4px 16px #0002;position:relative;z-index:20}.header-row{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 0}.brand{display:flex;gap:12px;align-items:center;color:#fff;text-decoration:none;font-weight:850}.brand-mark{width:43px;height:43px;border-radius:12px;background:var(--accent);display:grid;place-items:center;color:var(--footer);box-shadow:inset 0 0 0 1px #fff6}.brand-mark svg{width:28px;height:28px}.brand small{display:block;font-weight:500;color:#eef3f3}.nav-toggle{display:none;background:#fff1;border:1px solid #ffffff55;color:#fff;padding:9px 11px;border-radius:10px}.topnav{display:flex;gap:6px;flex-wrap:wrap}.topnav a{color:#f4f7ff;text-decoration:none;padding:8px 10px;border-radius:9px;font-size:.95rem}.topnav a:hover,.topnav a[aria-current="page"]{background:#ffffff18;color:#fff}
.hero{position:relative;overflow:hidden;background:linear-gradient(145deg,#f7efe6,#eef1f3);border-bottom:1px solid var(--line)}.hero:after{content:"";position:absolute;width:430px;height:430px;right:-100px;top:-170px;border-radius:38% 62% 55% 45%;border:70px solid color-mix(in srgb,var(--accent) 18%,transparent);transform:rotate(22deg)}.hero-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr);gap:48px;align-items:center;padding:72px 0;position:relative;z-index:1}.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-weight:850;color:var(--secondary);font-size:.78rem}.hero h1{font-size:clamp(2.35rem,5vw,5rem);line-height:1.02;margin:.2em 0 .25em;letter-spacing:-.045em}.hero p{font-size:1.13rem;color:var(--muted);max-width:780px}.hero-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:26px;box-shadow:var(--shadow)}.hero-visual{height:220px;border-radius:22px;background:linear-gradient(135deg,var(--soft),#fff);display:grid;place-items:center;position:relative;overflow:hidden;margin-bottom:18px}.hero-visual svg{width:125px;color:var(--primary)}.hero-visual:before,.hero-visual:after{content:"";position:absolute;border:2px dashed var(--accent);opacity:.45;border-radius:20px}.hero-visual:before{inset:18px}.hero-visual:after{inset:42px}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border-radius:12px;padding:11px 16px;font-weight:780;border:1px solid transparent;cursor:pointer}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--secondary);color:#fff}.btn-secondary{background:#fff;color:var(--ink);border-color:var(--line)}
.section{padding:56px 0}.section.alt{background:#fff;border-block:1px solid var(--line)}.section h2{font-size:clamp(1.65rem,3vw,2.55rem);line-height:1.15;margin:0 0 14px;letter-spacing:-.02em}.lead{font-size:1.08rem;color:var(--muted);max-width:900px}.grid{display:grid;gap:20px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 5px 18px #0000000c}.card h3{margin:0 0 7px;font-size:1.15rem}.card p{color:var(--muted);margin:.35em 0}.card .kicker{font-size:.76rem;text-transform:uppercase;letter-spacing:.1em;font-weight:850;color:var(--secondary)}.card-link{display:block;text-decoration:none;color:inherit;transition:.18s transform,.18s box-shadow}.card-link:hover{transform:translateY(-2px);box-shadow:var(--shadow);color:inherit}.iconbox{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:var(--soft);color:var(--primary);font-weight:900;margin-bottom:14px}.mini-stat{font-size:1.75rem;font-weight:900;color:var(--primary);line-height:1}
.page-head{background:linear-gradient(145deg,#f7efe6,#eef1f3);border-bottom:1px solid var(--line);padding:50px 0}.breadcrumbs{font-size:.9rem;color:var(--muted);margin-bottom:12px}.breadcrumbs a{color:inherit}.page-head h1{font-size:clamp(2rem,4vw,3.5rem);line-height:1.08;margin:.15em 0 .25em;letter-spacing:-.035em;max-width:1050px}.page-head p{max-width:920px;font-size:1.08rem;color:var(--muted)}.content-wrap{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:38px;padding:44px 0 66px}.prose h2{font-size:1.7rem;line-height:1.2;margin:1.65em 0 .5em}.prose h3{font-size:1.25rem;margin:1.35em 0 .4em}.prose p,.prose li{color:#3d4650}.prose ul,.prose ol{padding-left:1.25em}.note,.warning,.tip{border-left:5px solid var(--primary);background:var(--soft);padding:16px 18px;border-radius:0 12px 12px 0;margin:22px 0}.warning{border-color:#a95c2f;background:#fff0e7}.sidebox{position:sticky;top:18px}.side ul{list-style:none;padding:0;margin:0}.side li{border-bottom:1px solid var(--line)}.side a{display:block;padding:9px 0;text-decoration:none;color:#44505a}
.calc-shell{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);overflow:hidden;margin:28px 0}.calc-head{background:linear-gradient(125deg,var(--footer),var(--primary));color:#fff;padding:20px 24px}.calc-head h2{margin:0;font-size:1.45rem}.calc-body{padding:24px}.calc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.field label{display:block;font-weight:760;margin-bottom:6px}.field input{width:100%;border:1px solid #bbc5c5;border-radius:10px;padding:10px 11px;background:#fff;color:var(--ink)}.calc-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.calc-result{margin-top:20px;background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:18px}.calc-result strong.big{font-size:1.8rem;display:block;color:var(--primary)}.result-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:12px}.result-chip{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px}.result-chip span{display:block;color:var(--muted);font-size:.84rem}.result-chip b{font-size:1.08rem}.formula{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#f6f5f1;border:1px solid var(--line);padding:12px;border-radius:10px;overflow:auto}
.check-section{margin:24px 0}.check-item{display:flex;gap:10px;align-items:flex-start;border-bottom:1px solid var(--line);padding:9px 0}.check-item input{margin-top:6px;transform:scale(1.15)}.progressbox{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:14px;margin:16px 0}.progressbar{height:11px;background:#fff;border:1px solid var(--line);border-radius:99px;overflow:hidden}.progressbar span{display:block;height:100%;background:var(--primary);width:0}.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px 16px;margin:9px 0}.faq summary{cursor:pointer;font-weight:750}.directory-list{columns:2;column-gap:30px}.directory-list a{display:block;break-inside:avoid;padding:6px 0}
.site-footer{background:var(--footer);color:#dce5e2;padding:40px 0 26px}.footer-grid{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:32px}.site-footer h3,.site-footer h4{color:#fff;margin-top:0}.site-footer a{color:#e5eceb}.site-footer ul{list-style:none;padding:0;margin:0}.site-footer li{margin:6px 0}.fine{border-top:1px solid #ffffff22;margin-top:28px;padding-top:18px;color:#b7c2c1;font-size:.9rem}.center{text-align:center}
@media(max-width:980px){.hero-grid{grid-template-columns:1fr}.content-wrap{grid-template-columns:1fr}.sidebox{position:static}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.wrap{width:min(var(--max),calc(100% - 22px))}.header-row{align-items:flex-start;flex-wrap:wrap}.nav-toggle{display:block;margin-left:auto}.topnav{display:none;width:100%}.topnav.open{display:flex;flex-direction:column;align-items:stretch}.grid-2,.grid-3,.grid-4,.calc-grid,.result-grid,.footer-grid{grid-template-columns:1fr}.hero-grid{padding:48px 0;gap:28px}.section{padding:42px 0}.directory-list{columns:1}}
@media print{.site-header,.site-footer,.side,.actions,.nav-toggle,.calc-actions{display:none!important}.content-wrap{display:block}.page-head{background:#fff;padding:16px 0}.calc-shell{box-shadow:none}.check-item{break-inside:avoid}}