:root{--bg:#f6f8ff;--surface:#ffffff;--ink:#101827;--muted:#5d687b;--line:#dbe3f0;--brand:#3157d5;--brand-2:#e9efff;--accent:#f59e0b;--shadow:0 16px 38px rgba(32,48,90,.10)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;overflow-x:hidden}
a{color:inherit}
img,svg{max-width:100%}
.wrap{width:min(1120px,calc(100% - 2rem));margin:0 auto}
header{border-bottom:1px solid var(--line);background:rgba(246,248,255,.95);backdrop-filter:blur(10px)}
.header{display:flex;gap:1rem;align-items:center;justify-content:space-between;min-height:72px;flex-wrap:wrap;padding:.75rem 0}
.logo{font-weight:750;text-decoration:none;letter-spacing:-.02em}
nav{display:flex;gap:.4rem;flex-wrap:wrap}
nav a{padding:.45rem .7rem;border-radius:999px;text-decoration:none;color:var(--muted)}
nav a:hover,nav a:focus-visible{background:var(--brand-2);color:var(--brand)}
main{padding:2rem 0 3rem}
.hero{display:grid;gap:1rem;margin-bottom:2rem}
.eyebrow{color:var(--brand);font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:.78rem}
h1{font-size:clamp(1.8rem,7vw,3.2rem);line-height:1.05;letter-spacing:-.045em;margin:.2rem 0 .8rem}
h2{font-size:clamp(1.25rem,4vw,1.8rem);line-height:1.15;letter-spacing:-.025em;margin:0 0 .8rem}
p{margin:.2rem 0 1rem;color:var(--muted)}
.grid{display:grid;gap:1rem}
.cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card,.panel{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:1rem;box-shadow:var(--shadow)}
.card h2,.card h3{margin-top:0}
.card a{color:var(--brand);font-weight:650}
.layout{display:grid;gap:1rem}
.calc{display:grid;gap:1rem}
form{display:grid;gap:1rem}
.field{display:grid;gap:.35rem}
label{font-weight:650}
input,select{width:100%;min-height:46px;border:1px solid #bfc6c3;border-radius:12px;padding:.7rem;background:#fff;font:inherit}
input:focus,select:focus{outline:3px solid rgba(49,87,213,.18);border-color:var(--brand)}
.result{background:linear-gradient(135deg,#3157d5,#193b9f);color:#fff;border-radius:18px;padding:1rem}
.result p{color:rgba(255,255,255,.82);margin-bottom:.35rem}
.result strong{display:block;font-size:clamp(1.45rem,6vw,2.2rem);letter-spacing:-.03em}
ul{padding-left:1.2rem}
li+li{margin-top:.4rem}
.faq details{border-top:1px solid var(--line);padding:.8rem 0}
.faq details:first-of-type{border-top:0}
summary{cursor:pointer;font-weight:650}
.notice{border-left:4px solid var(--accent);padding:.9rem 1rem;background:#fff8e8;color:var(--muted);border-radius:12px}
footer{border-top:1px solid var(--line);padding:1.5rem 0 2rem;color:var(--muted)}
.footer{display:flex;gap:1rem;justify-content:space-between;flex-wrap:wrap}
.footer a{color:var(--muted)}
.prose{max-width:760px}
@media (min-width:760px){main{padding-top:3rem}.layout{grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr);align-items:start}.calc{grid-template-columns:minmax(0,1fr) 280px}.panel{padding:1.25rem}}
.guide-grid{display:grid;gap:1rem;margin:1rem 0}
.stack{margin-top:1rem}
ol{padding-left:1.2rem}
@media (min-width:760px){.guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.path-row{display:flex;gap:.65rem;flex-wrap:wrap}.path-row a{background:linear-gradient(135deg,#3157d5,#193b9f);color:#fff;text-decoration:none;padding:.7rem .9rem;border-radius:999px;font-weight:650;box-shadow:0 10px 22px rgba(49,87,213,.18)}.home-band{display:grid;gap:1rem;margin:1.5rem 0}.guide-article h2{margin-top:1.5rem}.guide-article .panel{margin-top:1.5rem}
@media (max-width:640px){.header{align-items:flex-start}.logo{width:100%}nav{gap:.25rem}nav a{padding:.35rem .55rem;font-size:.95rem}}
@media (min-width:760px){.home-band{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start}}