:root{--blue:#2463f3;--navy:#0e172d;--ink:#172033;--muted:#697386;--line:#e5e9ef;--bg:#f7f9fc}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,Arial,sans-serif;font-size:14px}a{color:inherit;text-decoration:none}.wrap{width:min(1110px,calc(100% - 34px));margin:auto}.site-header{height:58px;background:#fff;border-bottom:1px solid #d9dde5;position:sticky;top:0;z-index:20}.nav{height:100%;display:flex;align-items:center;gap:24px}.brand{font-weight:800;font-size:15px;display:flex;align-items:center;gap:5px;white-space:nowrap}.brand-mark{background:#2463f3;color:#fff;border-radius:5px;padding:4px 6px}.main-nav{display:flex;align-items:center;gap:18px;margin-left:auto}.main-nav a{font-size:11px;font-weight:600;color:#263044}.main-nav a:hover{color:var(--blue)}.menu-toggle{display:none;border:0;background:none;font-size:24px}.hero{background:linear-gradient(180deg,#0d1838,#111f46);color:#fff}.hero-inner{text-align:center;padding:44px 20px 38px}.badge{font-size:10px;letter-spacing:.7px;background:#edf4ff;color:#2463f3;border-radius:20px;padding:7px 11px;display:inline-block;font-weight:800}.hero .badge{background:#1d315f;color:#8fb5ff}.hero h1{font-family:Georgia,serif;font-size:31px;line-height:1.12;margin:13px 0 8px}.hero p{max-width:620px;margin:0 auto;color:#bdc8dc;line-height:1.6}.stats{display:flex;justify-content:center;gap:90px;margin-top:28px}.stats div{display:flex;flex-direction:column}.stats b{font-size:18px}.stats span{font-size:9px;color:#aab5ca;margin-top:5px}.state-box{background:#fff;margin-top:-27px;position:relative;border-radius:10px;box-shadow:0 10px 30px rgba(20,35,60,.12);padding:0 20px 22px}.box-head{padding:18px 0 14px}.box-head h2{font-size:14px;margin:0 0 3px}.box-head p{font-size:10px;color:#7b8494;margin:0 0 14px}.box-head input{display:block;width:240px;margin:auto;border:1px solid var(--line);border-radius:7px;padding:9px 12px;font-size:11px}.state-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:11px}.state-card{border:1px solid var(--line);border-radius:8px;padding:15px 14px;min-height:91px;transition:.2s;background:#fff}.state-card:hover{border-color:#a8c0ff;box-shadow:0 5px 14px rgba(25,60,120,.07)}.state-card>div{display:flex;justify-content:space-between}.state-card strong{font-size:13px}.state-card div span{color:#b1b9c6;font-size:18px}.state-card small{display:block;color:#778092;font-size:9px;margin-top:7px}.state-card p{margin:9px 0 0;display:flex;gap:5px;flex-wrap:wrap}.state-card i,.chips span{font-style:normal;background:#f2f5f8;border-radius:3px;padding:3px 6px;font-size:8px;color:#667084}.guide{padding:70px 60px 35px}.rule{width:80%;height:1px;background:var(--line);margin:0 auto 55px}.guide h2,.info-panel h2{font:700 23px Georgia,serif;margin:0 0 12px}.guide p{font-size:11px;line-height:1.75;color:#5e6879}.two{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin:24px 0}.two h3,.guide>h3{font-size:12px;margin-bottom:4px}.guide table{width:100%;border-collapse:collapse;border:1px solid var(--line);border-radius:8px;overflow:hidden;font-size:10px;margin-top:20px}.guide th,.guide td{text-align:left;padding:9px;border-bottom:1px solid var(--line)}.guide th{background:#f7f9fb}.tools{padding:25px 0 60px}.tools h2{font:700 21px Georgia,serif}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.tool-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:17px;display:grid;grid-template-columns:1fr auto;gap:4px}.tool-card small{grid-column:1/-1;color:#7c8594}.discover{margin-bottom:0;border:1px solid var(--line);background:#fff}.discover-title{background:#eaf1ff;padding:10px 14px;font-size:11px;font-weight:700}.discover a{display:flex;justify-content:space-between;padding:14px;border-top:1px solid var(--line);font-size:12px}.footer{background:#0e172d;color:#aeb8ca;padding:40px 0 18px;margin-top:0}.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:50px}.footer h3,.footer h4{color:#fff}.footer h3{font-family:Georgia,serif;font-size:14px}.footer h4{font-size:11px}.footer p,.footer a{display:block;font-size:10px;line-height:1.8}.copyright{text-align:center;border-top:1px solid #202b43;margin-top:30px;padding-top:17px;font-size:9px}.tool-page{padding:45px 0 70px}.tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:20px}.tool-main h1{font:700 32px Georgia,serif;margin:10px 0}.lead{color:#687386;line-height:1.7}.calc-card,.info-panel,.side-card{background:#fff;border:1px solid var(--line);border-radius:9px;box-shadow:0 5px 18px rgba(20,35,60,.06)}.calc-card{padding:20px;margin-top:22px}.calc-card label{display:block;font-size:10px;font-weight:700;color:#5d6676;margin:0 0 13px}.calc-card input,.calc-card select{display:block;width:100%;margin-top:6px;border:1px solid #dce2ea;border-radius:6px;padding:11px;background:#fff}.select-row{display:grid;grid-template-columns:1fr 1fr;gap:15px}.calc-card button{background:var(--blue);border:0;color:#fff;padding:12px 18px;border-radius:6px;font-weight:700;cursor:pointer}.result{margin-top:17px;background:#10192e;color:#fff;border-radius:8px;padding:18px;text-align:center}.result small{display:block;color:#8d9ab1;font-size:8px}.result strong{display:block;font-size:27px;margin:5px 0}.result span{color:#91b0ff}.formula{font-size:10px;color:#667084}.info-panel{margin-top:18px;padding:22px}.side-card{padding:18px;margin-bottom:14px}.side-card h3{font:700 17px Georgia,serif;margin-top:0}.side-card a{display:block;border-top:1px solid var(--line);padding:11px 0;font-size:11px}.dark{background:#eaf1ff}.content{padding:50px 0}.content h1{font-family:Georgia,serif}@media(max-width:800px){.main-nav{display:none;position:absolute;top:58px;left:0;right:0;background:#fff;padding:15px;flex-direction:column;align-items:flex-start;border-bottom:1px solid var(--line)}.main-nav.open{display:flex}.menu-toggle{display:block;margin-left:auto}.state-grid,.tool-grid{grid-template-columns:1fr 1fr}.stats{gap:35px}.guide{padding:50px 10px}.tool-layout{grid-template-columns:1fr}.foot-grid{grid-template-columns:1fr 1fr}.hero h1{font-size:26px}}@media(max-width:520px){.state-grid,.tool-grid,.two,.select-row,.foot-grid{grid-template-columns:1fr}.state-box{width:calc(100% - 18px)}.hero-inner{padding-top:35px}.stats{gap:18px}.stats b{font-size:16px}.box-head input{width:100%}.tool-page{padding-top:30px}}

.menu-fallback{display:flex;gap:22px;list-style:none;margin:0;padding:0}.menu-fallback a{color:inherit;text-decoration:none}.main-nav.open{display:block}@media(max-width:800px){.menu-fallback{flex-direction:column;gap:10px}}
.tools-intro{margin:-10px 0 18px;color:#687386}

/* Blog */
.blog-hero{background:#fff;border-bottom:1px solid var(--line);padding:48px 0 42px;text-align:center}.blog-hero h1{font:700 34px Georgia,serif;margin:14px 0 8px}.blog-hero p{max-width:650px;margin:auto;color:#697386;line-height:1.7}.blog-wrap{padding:38px 0 70px}.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.post-card{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;box-shadow:0 5px 18px rgba(20,35,60,.05)}.post-thumb{display:block;height:180px;background:#eef2f7;overflow:hidden}.post-thumb img{width:100%;height:100%;object-fit:cover}.post-card-body{padding:18px}.post-meta{font-size:10px;color:#7a8495;margin-bottom:8px}.post-card h2{font:700 20px Georgia,serif;line-height:1.25;margin:0 0 9px}.post-card p{font-size:11px;color:#687386;line-height:1.7;margin:0 0 14px}.read-more{font-size:11px;font-weight:700;color:var(--blue)}.blog-pagination{display:flex;justify-content:center;gap:8px;margin-top:30px}.blog-pagination a,.blog-pagination span{padding:9px 12px;border:1px solid var(--line);background:#fff;border-radius:6px;font-size:11px}.blog-pagination .current{background:var(--blue);color:#fff;border-color:var(--blue)}.empty-blog{background:#fff;border:1px solid var(--line);border-radius:10px;padding:45px;text-align:center}.empty-blog h2{font:700 24px Georgia,serif}.empty-blog p{color:#697386;line-height:1.7}.calc-btn{display:inline-block;background:var(--blue);color:#fff;padding:11px 17px;border-radius:6px;font-weight:700;font-size:12px}.single-post-page{padding:48px 0 75px}.single-wrap{max-width:850px}.single-post{background:#fff;border:1px solid var(--line);border-radius:10px;padding:35px 42px;box-shadow:0 5px 18px rgba(20,35,60,.05)}.single-post h1{font:700 38px Georgia,serif;line-height:1.15;margin:8px 0 25px}.single-featured{margin:0 -42px 28px}.single-featured img{width:100%;display:block;max-height:480px;object-fit:cover}.entry-content{font-size:15px;line-height:1.85;color:#394357}.entry-content h2,.entry-content h3{font-family:Georgia,serif;color:var(--ink);margin-top:28px}.entry-content img{max-width:100%;height:auto}.entry-content a{color:var(--blue);text-decoration:underline}
@media(max-width:800px){.blog-grid{grid-template-columns:1fr 1fr}.single-post{padding:25px}.single-featured{margin:0 -25px 25px}.single-post h1{font-size:30px}}
@media(max-width:520px){.blog-grid{grid-template-columns:1fr}.post-thumb{height:200px}.single-post h1{font-size:27px}}
/* v7 category and tool controls */
.category-head{margin-bottom:24px}.category-head h2{margin:8px 0 4px}.category-title-row{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:20px 0 12px}.category-title-row h3{margin:0}.category-title-row p{margin:4px 0;color:#64748b;font-size:14px}.category-title-row a{white-space:nowrap;font-weight:700;color:#2563eb}.tool-category-block{padding:18px 0;border-top:1px solid #e6e9ef}.category-page{padding-top:50px;padding-bottom:80px}.category-hero{background:#fff;border:1px solid #e4e8ef;border-radius:16px;padding:32px;margin-bottom:22px;box-shadow:0 5px 20px rgba(15,23,42,.05)}.category-hero h1{margin:10px 0}.category-tools-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.htb-widget{margin:24px 0;padding:24px;background:#fff;border:1px solid #e3e8ef;border-radius:16px;box-shadow:0 8px 26px rgba(15,23,42,.06)}.htb-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.htb-widget label{display:block;font-weight:700;color:#1e293b}.htb-widget input,.htb-widget select{display:block;width:100%;box-sizing:border-box;padding:13px 14px;margin-top:7px;border:1px solid #d9e0ea;border-radius:9px;background:#fff}.htb-widget button{margin-top:18px;border:0;border-radius:9px;padding:13px 24px;background:#2563eb;color:#fff;font-weight:800;cursor:pointer}.htb-result{margin-top:18px;background:#0f172a;color:#fff;border-radius:12px;padding:20px}.htb-result small{display:block;opacity:.7}.htb-result strong{font-size:28px;display:inline-block;margin-top:6px}.htb-formula{color:#64748b;font-size:13px}.htb-pdf p{color:#64748b}.htb-status{margin-top:12px;font-weight:700}.htb-pdf input,.htb-pdf select{max-width:620px}.htb-pdf-run{background:#2563eb}.htb-pdf label{margin:10px 0}.side-card a{color:#2563eb;font-weight:600}
@media(max-width:760px){.htb-form-grid,.category-tools-grid{grid-template-columns:1fr}.category-title-row{align-items:start;flex-direction:column}.category-hero{padding:22px}}