:root{--white:#ffffff;--green-dark:#1c4a38;--green-deep:#123527;--green-light:#8fc7a6;--green-pale:#eef6f1;--gray:#5f6b66;--gray-line:#dfe6e2;--ink:#22302a;--radius:10px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Georgia,'Times New Roman',serif;color:var(--ink);background:var(--white);line-height:1.7;font-size:1.02rem}
h1,h2,h3,h4,.sans{font-family:'Segoe UI',system-ui,-apple-system,Arial,sans-serif}
img{max-width:100%;height:auto;display:block}
a{color:var(--green-dark)}
a:focus-visible,button:focus-visible{outline:3px solid var(--green-light);outline-offset:2px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--green-dark);color:#fff;padding:10px 16px;z-index:2147483001}
.skip-link:focus{left:8px;top:8px}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.site-nav{position:sticky;top:0;z-index:2147483000;isolation:isolate;background:var(--white);border-bottom:1px solid var(--gray-line);box-shadow:0 1px 8px rgba(18,53,39,.06)}
.nav-inner{display:flex;align-items:center;gap:26px;min-height:66px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--green-deep);font-weight:700;font-size:1.18rem;font-family:'Segoe UI',system-ui,sans-serif}
.logo img{width:34px;height:34px}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none}
.nav-links>li{position:relative}
.nav-links a,.nav-links button.drop-toggle{display:block;padding:12px 13px;color:var(--ink);text-decoration:none;font-family:'Segoe UI',system-ui,sans-serif;font-size:.96rem;background:none;border:0;cursor:pointer;min-height:44px}
.nav-links a:hover,.drop-toggle:hover{color:var(--green-dark)}
.dropdown{position:absolute;left:0;top:100%;background:var(--white);border:1px solid var(--gray-line);border-radius:0 0 var(--radius) var(--radius);box-shadow:0 10px 24px rgba(18,53,39,.12);min-width:230px;display:none;padding:6px 0}
.dropdown a{padding:10px 18px}
li.has-drop:hover .dropdown,li.has-drop:focus-within .dropdown,li.has-drop.open .dropdown{display:block}
.nav-spacer{flex:1 1 auto;min-width:40px}
.btn{display:inline-block;background:var(--green-dark);color:#fff;text-decoration:none;padding:12px 26px;border-radius:999px;font-family:'Segoe UI',system-ui,sans-serif;font-weight:600;border:0;cursor:pointer;min-height:44px;font-size:.98rem}
.btn:hover{background:var(--green-deep)}
.btn-light{background:var(--green-pale);color:var(--green-deep);border:1px solid var(--green-light)}
.nav-burger{display:none;background:none;border:1px solid var(--gray-line);border-radius:8px;padding:8px 12px;font-size:1.2rem;cursor:pointer;min-height:44px;min-width:44px}
.hero{position:relative;background:var(--green-deep);color:#fff}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;padding:52px 0}
.hero h1{font-size:2.1rem;line-height:1.25;margin-bottom:16px;text-wrap:balance}
.hero p{color:#dcebe2;margin-bottom:22px;max-width:56ch}
.hero img{border-radius:var(--radius);width:100%}
.hero .btn{background:var(--green-light);color:var(--green-deep)}
.hero .btn:hover{background:#a8d6bc}
.form-zone{background:var(--green-pale);border-bottom:1px solid var(--gray-line);padding:34px 0}
.form-shell{position:relative;z-index:1;isolation:isolate;background:#fff;border:1px solid var(--gray-line);border-radius:var(--radius);padding:18px}
.page-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:40px;padding:40px 0}
.breadcrumb{font-size:.86rem;color:var(--gray);padding:14px 0 0;font-family:'Segoe UI',system-ui,sans-serif}
.breadcrumb a{color:var(--gray)}
article h2{color:var(--green-deep);font-size:1.5rem;margin:34px 0 12px;text-wrap:balance}
article h3{color:var(--green-dark);font-size:1.15rem;margin:24px 0 8px}
article p{margin:0 0 15px}
article ul,article ol{margin:0 0 16px 24px}
article li{margin-bottom:7px}
article img{border-radius:var(--radius);margin:20px auto}
article img.body-vertical{max-width:420px;width:100%}
.toc{background:var(--green-pale);border:1px solid var(--green-light);border-radius:var(--radius);padding:18px 22px;margin:22px 0}
.toc strong{font-family:'Segoe UI',system-ui,sans-serif;color:var(--green-deep)}
.toc ol{margin:8px 0 0 20px;columns:2;gap:26px}
.toc li{margin-bottom:5px;font-size:.94rem}
table{width:100%;border-collapse:collapse;margin:18px 0;font-size:.95rem;font-family:'Segoe UI',system-ui,sans-serif}
th,td{border:1px solid var(--gray-line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--green-pale);color:var(--green-deep)}
tbody tr:nth-child(even){background:#f8fbf9}
.card-row{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin:24px 0}
.card{border:1px solid var(--gray-line);border-radius:var(--radius);overflow:hidden;background:#fff;display:flex;flex-direction:column}
.card img{margin:0;border-radius:0}
.card .card-body{padding:16px 18px 20px;flex:1}
.card h3{margin:0 0 8px}
.card h3 a{text-decoration:none;color:var(--green-deep)}
.card p{font-size:.93rem;margin-bottom:0;color:var(--gray)}
.card .amt{display:inline-block;background:var(--green-pale);color:var(--green-deep);border-radius:999px;padding:3px 12px;font-size:.83rem;font-family:'Segoe UI',system-ui,sans-serif;margin-bottom:9px}
.sidebar{display:flex;flex-direction:column;gap:18px}
.sbox{border:1px solid var(--gray-line);border-radius:var(--radius);padding:18px 20px;background:#fff}
.sbox h3{font-size:1rem;color:var(--green-deep);margin-bottom:9px;padding-bottom:7px;border-bottom:2px solid var(--green-light)}
.sbox ul{list-style:none}
.sbox li{margin-bottom:7px;font-size:.92rem;font-family:'Segoe UI',system-ui,sans-serif}
.sbox p{font-size:.9rem;color:var(--gray);margin-bottom:8px;font-family:'Segoe UI',system-ui,sans-serif}
.sbox.cta{background:var(--green-deep);color:#fff;text-align:center}
.sbox.cta h3{color:#fff;border-color:var(--green-light)}
.sbox.cta p{color:#cfe4d8}
.mini-faq details{border:1px solid var(--gray-line);border-radius:8px;margin-bottom:10px;background:#fff}
.mini-faq summary{padding:12px 16px;cursor:pointer;font-family:'Segoe UI',system-ui,sans-serif;font-weight:600;color:var(--green-deep)}
.mini-faq div{padding:0 16px 14px;font-size:.96rem}
.cta-zone{background:linear-gradient(120deg,var(--green-deep),var(--green-dark));color:#fff;text-align:center;padding:46px 20px;margin-top:30px}
.cta-zone h2{font-size:1.6rem;margin-bottom:10px;text-wrap:balance}
.cta-zone p{color:#d5e8dd;max-width:60ch;margin:0 auto 20px}
footer{background:#0f2a1e;color:#c8d8cf;font-size:.92rem}
.foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:34px;padding:44px 0 26px}
footer h4{color:#fff;font-size:1rem;margin-bottom:12px}
footer ul{list-style:none}
footer li{margin-bottom:8px}
footer a{color:#c8d8cf;text-decoration:none}
footer a:hover{color:var(--green-light);text-decoration:underline}
.foot-legal{border-top:1px solid #24483a;padding:20px 0 30px;font-size:.83rem;color:#9db4a8;line-height:1.65}
.foot-legal p{margin-bottom:10px}
#toTop{position:fixed;right:18px;bottom:18px;background:var(--green-dark);color:#fff;border:0;border-radius:50%;width:48px;height:48px;font-size:1.2rem;cursor:pointer;display:none;z-index:2147482000}
#toTop:hover{background:var(--green-deep)}
.calc-box{border:1px solid var(--green-light);background:var(--green-pale);border-radius:var(--radius);padding:24px;margin:22px 0;font-family:'Segoe UI',system-ui,sans-serif}
.calc-box label{display:block;font-weight:600;color:var(--green-deep);margin:14px 0 6px}
.calc-box input[type=range]{width:100%}
.calc-box select,.calc-box input[type=number]{padding:10px;border:1px solid var(--gray-line);border-radius:8px;width:100%;font-size:1rem}
.calc-out{background:#fff;border-radius:8px;padding:18px;margin-top:18px;border:1px solid var(--gray-line)}
.calc-out .big{font-size:1.9rem;color:var(--green-deep);font-weight:700}
.rating{color:#c99b2e;font-size:1.1rem}
.review-item{border:1px solid var(--gray-line);border-radius:var(--radius);padding:16px 20px;margin-bottom:14px;background:#fff}
.review-item .who{font-family:'Segoe UI',system-ui,sans-serif;font-weight:600;color:var(--green-deep)}
.share-row{display:flex;gap:10px;margin:18px 0;font-family:'Segoe UI',system-ui,sans-serif}
.share-row a{border:1px solid var(--gray-line);border-radius:999px;padding:8px 16px;text-decoration:none;font-size:.88rem;min-height:44px;display:inline-flex;align-items:center}
.related-row{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:20px 0}
.author-box{background:var(--green-pale);border-left:4px solid var(--green-dark);border-radius:0 8px 8px 0;padding:14px 18px;margin:20px 0;font-size:.93rem;font-family:'Segoe UI',system-ui,sans-serif}
.gloss-term{border-bottom:1px solid var(--gray-line);padding:14px 0}
.gloss-term h3{margin-top:0}
@media(max-width:960px){
.hero-grid{grid-template-columns:1fr;padding:36px 0}
.page-grid{grid-template-columns:1fr}
.foot-grid{grid-template-columns:1fr 1fr}
.card-row{grid-template-columns:1fr}
.related-row{grid-template-columns:1fr}
.toc ol{columns:1}
.nav-burger{display:block;margin-left:auto}
.nav-links{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;border-bottom:1px solid var(--gray-line);padding:8px 0;box-shadow:0 14px 24px rgba(18,53,39,.12)}
.nav-links.open{display:flex}
.dropdown{position:static;display:none;box-shadow:none;border:0;background:var(--green-pale)}
li.has-drop.open .dropdown{display:block}
li.has-drop:hover .dropdown{display:none}
li.has-drop.open:hover .dropdown{display:block}
.nav-spacer{display:none}
.nav-inner .btn{display:none}
}
.bcard{background:#fff;border:1px solid var(--gray-line);border-radius:10px;overflow:hidden;display:flex;flex-direction:column}
.bcard img{width:100%;height:auto;display:block}
.bcard h3{font-size:1.02rem;margin:12px 14px 6px;line-height:1.35}
.bcard h3 a{color:var(--green-dark);text-decoration:none}
.bcard h3 a:hover,.bcard h3 a:focus{text-decoration:underline}
.bcard p{margin:0 14px 14px;font-size:.9rem;color:var(--gray)}
.sitemap-list{list-style:none;padding:0;margin:14px 0 26px}
.sitemap-list li{padding:9px 0;border-bottom:1px solid var(--gray-line)}
.sitemap-list a{color:var(--green-dark);text-decoration:none;font-family:'Segoe UI',system-ui,sans-serif}
.sitemap-list a:hover,.sitemap-list a:focus{text-decoration:underline}

/* === polish pass: symmetry & refinement === */
h1,h2,h3,h4{text-wrap:balance}
article p,article li{text-wrap:pretty}
.card,.bcard,.sbox{transition:transform .18s ease,box-shadow .18s ease}
.card:hover,.bcard:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(18,53,39,.12)}
.card img,.bcard img{display:block;width:100%;height:auto}
article table{border-collapse:collapse;width:100%;margin:18px 0;font-size:.94rem}
article table th{background:var(--green-pale);color:var(--green-deep);text-align:left}
article table th,article table td{border:1px solid var(--gray-line);padding:10px 12px;vertical-align:top}
article table tbody tr:nth-child(even){background:#f7faf8}
article table tbody tr:hover{background:var(--green-pale)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--green-light);outline-offset:2px;border-radius:4px}
.btn:hover{filter:brightness(1.08)}
.btn:active{transform:translateY(1px)}
details{border:1px solid var(--gray-line);border-radius:var(--radius);padding:0;margin:12px 0;background:var(--white)}
details summary{cursor:pointer;padding:14px 18px;font-weight:600;font-family:'Segoe UI',system-ui,sans-serif;color:var(--green-deep);list-style-position:inside}
details[open] summary{border-bottom:1px solid var(--gray-line);background:var(--green-pale);border-radius:var(--radius) var(--radius) 0 0}
details>div{padding:14px 18px}
details summary:hover{background:var(--green-pale)}
.author-box{background:var(--green-pale);border-left:4px solid var(--green-light);border-radius:0 var(--radius) var(--radius) 0;padding:14px 18px;margin:0 0 20px;font-size:.94rem}
.share-row{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0}
.share-row a{background:var(--green-pale);color:var(--green-deep);border:1px solid var(--green-light);border-radius:999px;padding:9px 18px;text-decoration:none;font-size:.88rem;font-family:'Segoe UI',system-ui,sans-serif;min-height:44px;display:inline-flex;align-items:center}
.share-row a:hover{background:var(--green-light)}
.gloss-term{scroll-margin-top:90px}
[id]{scroll-margin-top:84px}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.card,.bcard,.sbox{transition:none}}
.hero img{border-radius:var(--radius);box-shadow:0 18px 40px rgba(18,53,39,.18)}
::selection{background:var(--green-light);color:var(--green-deep)}
.quick-answer{background:linear-gradient(135deg,var(--green-pale),#fff);border:1px solid var(--green-light);border-left:5px solid var(--green-dark);border-radius:var(--radius);padding:16px 20px;margin:0 0 22px}
.quick-answer strong{font-family:'Segoe UI',system-ui,sans-serif;color:var(--green-deep);display:block;margin-bottom:6px;font-size:.92rem;letter-spacing:.4px;text-transform:uppercase}
.quick-answer p{margin:0;font-size:1.02rem}