@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;600;700&family=DM+Sans:wght@300;400;500&display=swap');

:root {
  --green: #1a6b3c;
  --green-dark: #124d2b;
  --green-light: #e8f5ee;
  --accent: #f0a500;
  --text: #1a1a2e;
  --muted: #5a6474;
  --bg: #f7f9f7;
  --white: #ffffff;
  --border: #dde5e0;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 2px 16px rgba(26,107,60,0.08);
  --shadow-lg: 0 8px 40px rgba(26,107,60,0.13);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);font-size:16px;line-height:1.7}
h1,h2,h3,h4{font-family:'Sora',sans-serif;line-height:1.25;font-weight:600}
a{color:var(--green);text-decoration:none;transition:color .2s}
a:hover{color:var(--green-dark)}
img{max-width:100%}

.container{max-width:1100px;margin:0 auto;padding:0 24px}
.container-sm{max-width:780px;margin:0 auto;padding:0 24px}

/* NAV */
nav.topnav{background:var(--white);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;max-width:1100px;margin:0 auto}
.logo{font-family:'Sora',sans-serif;font-weight:700;font-size:1.1rem;color:var(--green);display:flex;align-items:center;gap:8px}
.logo-box{width:30px;height:30px;background:var(--green);border-radius:7px;display:flex;align-items:center;justify-content:center;color:white;font-size:1rem;font-weight:700}
.nav-links{display:flex;gap:4px;list-style:none}
.nav-links a{font-size:.88rem;font-weight:500;color:var(--muted);padding:6px 13px;border-radius:8px;transition:all .2s}
.nav-links a:hover,.nav-links a.active{background:var(--green-light);color:var(--green)}

/* HERO */
.hero{background:linear-gradient(135deg,var(--green-dark) 0%,var(--green) 60%,#2d9b60 100%);color:white;padding:56px 0 72px;position:relative;overflow:hidden}
.hero::after{content:'';position:absolute;bottom:-100px;left:-60px;width:280px;height:280px;background:rgba(255,255,255,.04);border-radius:50%}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);padding:4px 14px;border-radius:100px;font-size:.78rem;font-weight:500;margin-bottom:16px}
.hero h1{font-size:clamp(1.9rem,4vw,2.8rem);font-weight:700;margin-bottom:12px;letter-spacing:-.02em}
.hero p{font-size:1.05rem;opacity:.88;max-width:500px}

/* CALC CARD */
.calc-wrap{margin-top:-44px;position:relative;z-index:10;margin-bottom:56px}
.calc-card{background:var(--white);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);overflow:hidden}
.calc-head{background:var(--green-light);padding:18px 26px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:8px}
.calc-head h2{font-size:1rem;color:var(--green-dark)}
.calc-body{padding:28px 26px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:20px}
.full{grid-column:1/-1}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-size:.82rem;font-weight:500;color:var(--muted);letter-spacing:.02em}
.form-group input,.form-group select{padding:11px 15px;border:1.5px solid var(--border);border-radius:var(--radius);font-family:'DM Sans',sans-serif;font-size:.95rem;color:var(--text);background:var(--bg);transition:border-color .2s,box-shadow .2s;outline:none}
.form-group input:focus,.form-group select:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(26,107,60,.1);background:white}
.prefix-wrap{position:relative}
.prefix-wrap span{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--muted);font-weight:500;pointer-events:none}
.prefix-wrap input{padding-left:26px}
.btn-calc{width:100%;padding:14px;background:var(--green);color:white;border:none;border-radius:var(--radius);font-family:'Sora',sans-serif;font-size:.95rem;font-weight:600;cursor:pointer;transition:all .2s}
.btn-calc:hover{background:var(--green-dark);transform:translateY(-1px);box-shadow:0 4px 16px rgba(26,107,60,.25)}
.btn-calc:active{transform:translateY(0)}
.result-box{margin-top:20px;background:var(--green-light);border:1.5px solid rgba(26,107,60,.2);border-radius:var(--radius);padding:22px 26px;display:none}
.result-box.show{display:block;animation:fadeUp .3s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.result-label{font-size:.75rem;font-weight:500;color:var(--green);text-transform:uppercase;letter-spacing:.08em;margin-bottom:5px}
.result-amount{font-family:'Sora',sans-serif;font-size:2.4rem;font-weight:700;color:var(--green-dark);line-height:1;margin-bottom:14px}
.result-breakdown{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px;padding-top:14px;border-top:1px solid rgba(26,107,60,.15)}
.bk-val{font-family:'Sora',sans-serif;font-size:1.05rem;font-weight:600;color:var(--green-dark)}
.bk-lbl{font-size:.73rem;color:var(--muted);margin-top:2px}
.btn-reset{margin-top:12px;background:none;border:1px solid var(--green);color:var(--green);padding:7px 18px;border-radius:8px;font-size:.83rem;cursor:pointer;font-family:'DM Sans',sans-serif;transition:all .2s}
.btn-reset:hover{background:var(--green);color:white}

/* SECTIONS */
.section{padding:56px 0}
.sec-label{font-size:.72rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--green);margin-bottom:8px}
.sec-title{font-size:clamp(1.4rem,3vw,2rem);font-weight:700;margin-bottom:12px;letter-spacing:-.02em}
.sec-sub{color:var(--muted);font-size:1rem;max-width:540px}

/* TOOL CARDS */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin-top:32px}
.tool-card{background:var(--white);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:26px;transition:all .25s;position:relative;overflow:hidden;cursor:pointer}
.tool-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--green);transform:scaleX(0);transition:transform .25s}
.tool-card:hover{border-color:var(--green);box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.tool-card:hover::before{transform:scaleX(1)}
.tool-icon{width:46px;height:46px;background:var(--green-light);border-radius:11px;display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.tool-icon svg{width:22px;height:22px;stroke:var(--green);fill:none;stroke-width:2}
.tool-card h3{font-size:1rem;margin-bottom:7px}
.tool-card p{font-size:.88rem;color:var(--muted);margin-bottom:16px;line-height:1.6}
.tool-link{display:inline-flex;align-items:center;gap:4px;font-size:.83rem;font-weight:600;color:var(--green)}

/* STEPS */
.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:20px;margin-top:32px}
.step{text-align:center;padding:20px}
.step-num{width:42px;height:42px;background:var(--green);color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:'Sora',sans-serif;font-weight:700;font-size:1rem;margin:0 auto 12px}
.step h3{font-size:.95rem;margin-bottom:6px}
.step p{font-size:.85rem;color:var(--muted)}

/* INFO */
.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.info-text h2{margin-bottom:12px}
.info-text p{color:var(--muted);margin-bottom:12px}
.info-list{list-style:none;display:flex;flex-direction:column;gap:9px;margin-top:16px}
.info-list li{display:flex;align-items:flex-start;gap:9px;font-size:.92rem}
.info-list li::before{content:'✓';width:20px;height:20px;background:var(--green);color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.7rem;flex-shrink:0;margin-top:2px}
.info-visual{background:var(--green-light);border-radius:var(--radius-lg);padding:28px;border:1.5px solid rgba(26,107,60,.15)}
.formula-box{background:white;border-radius:var(--radius);padding:16px 20px;margin-bottom:12px;border:1px solid var(--border);font-size:.88rem}
.formula-box strong{color:var(--green-dark);display:block;margin-bottom:4px}
.formula-box code{font-size:.9rem;color:var(--green);font-family:monospace;display:block;margin-top:4px}

/* BLOG */
.blog-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:22px;margin-top:32px}
.blog-card{background:var(--white);border:1.5px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:all .25s;display:block}
.blog-card:hover{border-color:var(--green);box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.blog-thumb{height:150px;background:linear-gradient(135deg,var(--green) 0%,#2d9b60 100%);display:flex;align-items:center;justify-content:center}
.blog-thumb-text{font-family:'Sora',sans-serif;font-size:1.2rem;font-weight:700;color:white;text-align:center;padding:20px;line-height:1.3}
.blog-body{padding:20px}
.blog-cat{font-size:.7rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--green);margin-bottom:7px;display:block}
.blog-card h3{font-size:1rem;margin-bottom:8px;line-height:1.35;color:var(--text)}
.blog-card p{font-size:.86rem;color:var(--muted);line-height:1.6;margin-bottom:14px}
.blog-meta{display:flex;align-items:center;justify-content:space-between;font-size:.78rem;color:var(--muted)}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:10px;margin-top:28px}
.faq-item{background:var(--white);border:1.5px solid var(--border);border-radius:var(--radius);overflow:hidden}
.faq-q{padding:16px 20px;cursor:pointer;display:flex;align-items:center;justify-content:space-between;font-weight:500;font-size:.92rem;transition:background .2s;user-select:none}
.faq-q:hover{background:var(--bg)}
.faq-q.open{color:var(--green)}
.faq-icon{width:22px;height:22px;border-radius:50%;border:1.5px solid var(--border);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .2s;font-size:1.1rem;color:var(--muted)}
.faq-q.open .faq-icon{background:var(--green);border-color:var(--green);color:white;transform:rotate(45deg)}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease;font-size:.9rem;color:var(--muted);line-height:1.7}
.faq-a.open{max-height:220px;padding:0 20px 16px}

/* CTA */
.cta-banner{background:linear-gradient(135deg,var(--green-dark) 0%,var(--green) 100%);border-radius:var(--radius-lg);padding:44px 36px;text-align:center;color:white;margin:36px 0}
.cta-banner h2{font-size:1.7rem;margin-bottom:10px}
.cta-banner p{opacity:.85;margin-bottom:22px}
.cta-links{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.btn-white{background:white;color:var(--green-dark);padding:11px 22px;border-radius:10px;font-weight:600;font-size:.88rem;transition:all .2s;font-family:'Sora',sans-serif;display:inline-block}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 4px 16px rgba(0,0,0,.2);color:var(--green-dark)}
.btn-outline-white{background:transparent;color:white;padding:11px 22px;border-radius:10px;font-weight:600;font-size:.88rem;border:1.5px solid rgba(255,255,255,.5);transition:all .2s;font-family:'Sora',sans-serif;display:inline-block}
.btn-outline-white:hover{background:rgba(255,255,255,.1);border-color:white;color:white}

/* FOOTER */
footer{background:var(--text);color:rgba(255,255,255,.7);padding:44px 0 22px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:36px}
.footer-brand p{font-size:.86rem;line-height:1.65;max-width:240px;margin-top:8px}
.footer-logo{font-family:'Sora',sans-serif;font-weight:700;color:white;font-size:1.05rem}
.footer-col h4{font-family:'Sora',sans-serif;font-size:.82rem;font-weight:600;color:white;margin-bottom:12px;letter-spacing:.03em}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:7px}
.footer-col ul a{font-size:.85rem;color:rgba(255,255,255,.6);transition:color .2s}
.footer-col ul a:hover{color:white}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:18px;display:flex;align-items:center;justify-content:space-between;font-size:.8rem}

/* PAGE HERO */
.page-hero{background:linear-gradient(135deg,var(--green-dark) 0%,var(--green) 100%);padding:48px 0 68px;color:white}
.page-hero h1{font-size:clamp(1.7rem,3.5vw,2.4rem);margin-bottom:10px}
.page-hero p{opacity:.85;font-size:1rem;max-width:540px}
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:.8rem;margin-bottom:14px;opacity:.75}
.breadcrumb a{color:rgba(255,255,255,.8)}
.breadcrumb a:hover{color:white}
.breadcrumb span.sep{opacity:.5}

/* BLOG PAGE */
.blog-layout{display:grid;grid-template-columns:1fr 300px;gap:32px;padding:44px 0}
.post-card-main{background:var(--white);border:1.5px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:all .25s;display:block}
.post-card-main:hover{border-color:var(--green);box-shadow:var(--shadow-lg)}
.post-thumb-lg{height:200px;background:linear-gradient(135deg,var(--green) 0%,#2d9b60 100%);display:flex;align-items:center;justify-content:center}
.post-card-main .blog-body{padding:26px}
.post-card-main h2{font-size:1.25rem;margin-bottom:9px;color:var(--text)}
.post-card-main p{color:var(--muted);font-size:.9rem;margin-bottom:16px;line-height:1.65}
.sidebar{display:flex;flex-direction:column;gap:18px}
.sidebar-widget{background:var(--white);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:20px}
.sidebar-widget h3{font-size:.9rem;margin-bottom:12px;color:var(--green-dark)}
.sidebar-links{list-style:none;display:flex;flex-direction:column;gap:7px}
.sidebar-links a{font-size:.86rem;color:var(--muted);display:flex;align-items:center;gap:5px;transition:color .2s}
.sidebar-links a::before{content:'→';font-size:.72rem}
.sidebar-links a:hover{color:var(--green)}

/* MINI CALC WIDGET */
.mini-calc{background:var(--white);border:1.5px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}
.mini-calc-head{background:var(--green);padding:14px 18px;color:white;font-size:.88rem;font-weight:500}
.mini-calc-body{padding:18px}
.mini-calc input{width:100%;padding:9px 12px;border:1.5px solid var(--border);border-radius:8px;font-family:'DM Sans',sans-serif;font-size:.86rem;margin-bottom:8px;outline:none;transition:border-color .2s}
.mini-calc input:focus{border-color:var(--green)}
.mini-calc label{font-size:.75rem;color:var(--muted);display:block;margin-bottom:3px}
.mini-calc button{width:100%;padding:10px;background:var(--green);color:white;border:none;border-radius:8px;font-family:'Sora',sans-serif;font-weight:600;font-size:.88rem;cursor:pointer;transition:background .2s}
.mini-calc button:hover{background:var(--green-dark)}
.mini-result{margin-top:10px;background:var(--green-light);border-radius:8px;padding:12px;text-align:center;display:none}
.mini-result.show{display:block}
.mini-result .amt{font-family:'Sora',sans-serif;font-size:1.5rem;font-weight:700;color:var(--green-dark)}
.mini-result .lbl{font-size:.72rem;color:var(--muted)}

/* ARTICLE */
.article-hero{background:linear-gradient(135deg,var(--green-dark) 0%,var(--green) 100%);padding:50px 0 72px;color:white}
.article-hero h1{font-size:clamp(1.6rem,3vw,2.2rem);margin-bottom:12px}
.article-meta{display:flex;gap:18px;font-size:.82rem;opacity:.75;flex-wrap:wrap;margin-top:10px}
.article-layout{display:grid;grid-template-columns:1fr 290px;gap:36px;margin-top:-40px;padding-bottom:56px}
.article-body{background:white;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:36px}
.article-body h2{font-size:1.4rem;margin:26px 0 10px;color:var(--text)}
.article-body h3{font-size:1.1rem;margin:20px 0 8px}
.article-body p{color:var(--muted);margin-bottom:13px;line-height:1.75}
.article-body ul{padding-left:18px;color:var(--muted);margin-bottom:13px}
.article-body ul li{margin-bottom:5px;line-height:1.65}
.article-body a{color:var(--green);text-decoration:underline;text-underline-offset:2px}
.placeholder-block{background:var(--bg);border:2px dashed var(--border);border-radius:var(--radius);padding:20px;margin:18px 0;color:var(--muted);font-size:.88rem}
.placeholder-block strong{display:block;margin-bottom:4px;color:var(--text)}
.toc{background:var(--green-light);border-radius:var(--radius);padding:18px 22px;margin:20px 0;border-left:3px solid var(--green)}
.toc h4{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:9px;color:var(--green)}
.toc ol{padding-left:16px}
.toc ol li{margin-bottom:4px}
.toc ol li a{font-size:.88rem;color:var(--green-dark);text-decoration:none}
.toc ol li a:hover{text-decoration:underline}
.article-sticky{position:sticky;top:76px;display:flex;flex-direction:column;gap:16px;margin-top:-40px}

/* RESPONSIVE */
@media(max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .info-grid{grid-template-columns:1fr}
  .blog-layout{grid-template-columns:1fr}
  .sidebar{display:none}
  .article-layout{grid-template-columns:1fr}
  .article-sticky{display:none}
}
@media(max-width:640px){
  .form-grid{grid-template-columns:1fr}
  .full{grid-column:1}
  .result-breakdown{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .cta-banner{padding:28px 20px}
}