:root{--ink:#17212b;--muted:#61707f;--line:#dfe6ec;--bg:#f7f9fb;--card:#fff;--brand:#0b6bcb;--brand2:#073b78;--soft:#eaf4ff;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.58}
a{color:inherit;text-decoration:none}.wrap{width:min(var(--max),calc(100% - 32px));margin-inline:auto}.narrow{max-width:820px}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}.nav{height:68px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;font-weight:850;font-size:1.08rem;margin-right:auto}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--brand);color:#fff;font-size:.78rem;letter-spacing:-.02em}.nav-links{display:flex;gap:22px;font-size:.95rem}.nav-links a:hover{color:var(--brand)}.lang-select select{border:1px solid var(--line);background:#fff;border-radius:9px;padding:9px 30px 9px 10px;color:var(--ink)}
.hero{padding:78px 0 64px;background:linear-gradient(180deg,#f3f8ff,#fff)}.hero.slim{padding:48px 0}.hero-grid{display:grid;grid-template-columns:1.5fr .8fr;gap:54px;align-items:center}.eyebrow{font-size:.77rem;font-weight:850;letter-spacing:.12em;color:var(--brand);margin:0 0 10px}.hero h1{font-size:clamp(2.45rem,6vw,4.8rem);line-height:1.02;letter-spacing:-.045em;max-width:860px;margin:0 0 20px}.tool-hero h1{font-size:clamp(2.3rem,5vw,4.2rem)}.lead{font-size:clamp(1.08rem,2vw,1.3rem);color:var(--muted);max-width:760px;margin:0}.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:10px;padding:13px 18px;font-weight:800;cursor:pointer;font-size:1rem}.primary{background:var(--brand);color:#fff}.primary:hover{background:var(--brand2)}.ghost{background:#edf2f6;color:var(--ink)}.hero-btn{margin-top:28px}.hero-panel{display:grid;grid-template-columns:auto 1fr;gap:10px 14px;background:#fff;border:1px solid var(--line);box-shadow:0 14px 34px rgba(29,70,110,.09);padding:26px;border-radius:18px}.hero-panel strong{font-size:1.7rem;color:var(--brand)}.hero-panel span{align-self:center;color:var(--muted)}
.section{padding:70px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:32px;margin-bottom:28px}.section-head h2,.prose h2,.trust-grid h2{font-size:clamp(1.7rem,3vw,2.35rem);letter-spacing:-.025em;margin:0 0 8px}.section-head>p{max-width:500px;color:var(--muted)}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.tool-card{border:1px solid var(--line);border-radius:16px;padding:24px;background:#fff;transition:.18s ease}.tool-card:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(20,55,90,.09);border-color:#bdd7ef}.tool-card h2{font-size:1.16rem;margin:15px 0 8px}.tool-card p{font-size:.93rem;color:var(--muted);margin:0 0 14px}.tool-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:11px;background:var(--soft);color:var(--brand);font-weight:900}.card-link{font-weight:800;color:var(--brand);font-size:.9rem}
.soft-section{background:var(--bg);padding:64px 0;border-block:1px solid #eef2f5}.trust-grid{display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:18px;align-items:stretch}.trust-grid>div:first-child{padding-right:20px}.trust-grid>div:first-child p,.trust-card p{color:var(--muted)}.trust-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}.trust-card b{font-size:1.05rem}
.breadcrumbs{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:.9rem;margin-bottom:28px}.breadcrumbs a{color:var(--brand)}.tool-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(240px,.8fr);gap:24px;margin-top:-24px;position:relative;z-index:2}.calculator-card{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 14px 34px rgba(29,70,110,.09);padding:26px}.calculator-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:17px}.field{display:flex;flex-direction:column;gap:7px}.field label{font-size:.88rem;font-weight:750}.field input,.field select{width:100%;border:1px solid #cfd8e1;border-radius:10px;padding:12px 13px;font:inherit;background:#fff;color:var(--ink)}.field input:focus,.field select:focus{outline:3px solid #d8ebff;border-color:var(--brand)}.actions{grid-column:1/-1;display:flex;gap:10px;padding-top:2px}.result{grid-column:1/-1;margin-top:20px;padding:20px;border-radius:13px;background:#f0f7ff;border:1px solid #cfe6fb;display:grid;gap:4px}.result-label{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--brand);font-weight:850}.result strong{font-size:1.7rem;line-height:1.25}.result small{color:var(--muted)}.ad-slot{min-height:250px;border:1px dashed #bdc8d2;border-radius:14px;background:#fafbfc;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#8090a0;padding:18px}.ad-slot span{font-size:.8rem;text-transform:uppercase;letter-spacing:.09em}.ad-slot small{margin-top:6px}.ad-slot.tall{min-height:320px}
.content-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(250px,.8fr);gap:40px;padding-top:58px;padding-bottom:80px}.prose{max-width:820px}.prose h2{margin-top:42px}.prose h2:first-child{margin-top:0}.prose p{color:#40505e}.callout{margin:28px 0;background:#f7f9fb;border-left:4px solid var(--brand);padding:18px 20px;border-radius:0 10px 10px 0}.callout p{margin:6px 0 0}.faq-list{border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line);padding:16px 0}summary{cursor:pointer;font-weight:800}details p{margin:9px 0 0}.sidebar{display:grid;align-content:start;gap:16px}.side-card,.note-card{border:1px solid var(--line);border-radius:14px;padding:20px}.side-card h3{margin:0 0 12px}.mini-card{display:flex;gap:10px;align-items:center;padding:11px 0;border-top:1px solid #edf1f4}.mini-card:first-of-type{border-top:0}.mini-card span{color:var(--brand)}.note-card{background:#fffaf0}.note-card p{color:var(--muted);margin-bottom:0}.page-prose{padding-top:48px;padding-bottom:70px}.translation-note{background:#fff8dc;border:1px solid #f1e0a8;padding:12px 14px;border-radius:10px}
.site-footer{background:#10202f;color:#d9e2ea;padding:48px 0 26px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px}.footer-grid>div{display:flex;flex-direction:column;gap:8px}.footer-grid p,.footer-grid a{color:#aebdca;font-size:.92rem}.footer-grid a:hover{color:#fff}.footer-brand{color:#fff}.copyright{border-top:1px solid #263746;margin-top:30px;padding-top:20px;color:#91a4b4;font-size:.84rem}.home-content{padding-top:70px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:900px){.hero-grid,.trust-grid,.tool-layout,.content-grid{grid-template-columns:1fr}.tool-grid{grid-template-columns:repeat(2,1fr)}.hero-panel{max-width:520px}.tool-layout{margin-top:20px}.ad-slot{min-height:130px}.nav-links{display:none}}
@media(max-width:620px){.wrap{width:min(var(--max),calc(100% - 22px))}.hero{padding:54px 0 44px}.tool-grid,.calculator-grid,.footer-grid{grid-template-columns:1fr}.section{padding:50px 0}.section-head{display:block}.lang-select select{max-width:130px}.calculator-card{padding:18px}.actions{flex-direction:column}.footer-grid{gap:26px}}

.deep-guide{margin:44px 0}.deep-guide .updated{font-size:.82rem;color:var(--muted);margin-bottom:18px}.deep-guide ul{padding-left:20px;color:#40505e}.deep-guide li{margin:8px 0}.guide-columns{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:8px}.quality-note{margin:28px 0;padding:20px;border:1px solid #cfe1f3;background:#f7fbff;border-radius:12px}.quality-note p{margin-bottom:0}@media(max-width:700px){.guide-columns{grid-template-columns:1fr}}

.build-version{opacity:.65;margin-inline-start:8px;font-size:.78rem}

/* V8 quality upgrade */
.planning-card{border:1px solid var(--line);border-radius:14px;background:#f8fbfe;padding:22px;align-self:start}.planning-card h2{font-size:1.12rem;margin:0 0 12px}.planning-card p,.planning-card li{color:var(--muted);font-size:.93rem}.planning-card ul{padding-left:20px;margin:0}.planning-card li{margin:8px 0}.planning-card.tall{min-height:0}
.learn-more-card{margin:22px 0;padding:18px 20px;border:1px solid #cfe1f3;background:#f7fbff;border-radius:12px}.learn-more-card p{margin:4px 0 8px}.learn-more-card a{display:block;color:var(--brand);font-weight:800;margin-top:6px}.calculator-cta{display:flex;justify-content:space-between;gap:24px;align-items:center;border:1px solid #cfe1f3;background:#f7fbff;border-radius:16px;padding:22px;margin:38px 0}.calculator-cta h2{margin-top:0}.calculator-cta p{margin-bottom:0}.guide-prose>.updated{font-size:.84rem;color:var(--muted)}.guide-card h2,.guide-card h3{font-size:1.08rem;margin:15px 0 8px}.section-link{margin-top:24px}.section-link a{color:var(--brand);font-weight:850}.checklist-card{border:1px solid var(--line);background:var(--bg);padding:20px;border-radius:14px;margin:24px 0}.checklist-card h3{margin-top:0}.checklist-card li{margin:8px 0}.prose a{color:var(--brand);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}.btn{text-decoration:none!important}.guide-layout{padding-top:54px}.tool-layout>.calculator-card:only-child{grid-column:1/-1;max-width:880px;width:100%;margin-inline:auto}
@media(max-width:700px){.calculator-cta{align-items:flex-start;flex-direction:column}.guide-grid{grid-template-columns:1fr}}