:root{
  --navy:#0E1B2C; --navy-2:#16273D; --paper:#F6F8FA; --white:#FFFFFF;
  --blue:#1E6FE0; --blue-dark:#1558B8; --blue-soft:#E8F0FC;
  --amber:#B97A0F; --amber-soft:#FBF1DC; --green:#177A48; --green-soft:#E2F3EA;
  --red:#C03A3A; --slate:#54657A; --line:#DEE5EC; --radius:14px;
  --disp:'Bricolage Grotesque',system-ui,sans-serif;
  --body:'Instrument Sans',system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--body);color:var(--navy);background:var(--white);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%}
a{color:var(--blue-dark)}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
.wrap-wide{max-width:1080px;margin:0 auto;padding:0 20px}
h1,h2,h3{font-family:var(--disp);line-height:1.18;letter-spacing:-0.015em;text-wrap:balance}
p,li{text-wrap:pretty}

header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:60px;gap:12px}
.logo{font-family:var(--disp);font-weight:800;font-size:1.2rem;text-decoration:none;color:var(--navy)}
.logo .x{color:var(--blue)}
.logo .ai{color:var(--slate);font-weight:500;font-size:.95em}
.nav-links{display:flex;gap:20px;font-size:.9rem;font-weight:600}
.nav-links a{text-decoration:none;color:var(--slate)}
.nav-links a:hover{color:var(--navy)}
.btn{display:inline-block;font-weight:700;font-size:.95rem;text-decoration:none;border-radius:10px;padding:12px 22px;background:var(--blue);color:#fff;transition:background .15s,transform .2s}
.btn:hover{background:var(--blue-dark);transform:translateY(-2px)}
.btn-sm{padding:8px 15px;font-size:.85rem}

article{padding:52px 0 72px}
.crumbs{font-size:.82rem;color:var(--slate);margin-bottom:18px}
.crumbs a{color:var(--slate);text-decoration:none}
.crumbs a:hover{color:var(--navy)}
article h1{font-size:clamp(1.9rem,5.5vw,2.7rem);font-weight:800;margin-bottom:14px}
.byline{font-size:.88rem;color:var(--slate);margin-bottom:28px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.byline strong{color:var(--navy)}
article h2{font-size:clamp(1.35rem,4vw,1.7rem);font-weight:800;margin:44px 0 14px}
article h3{font-size:1.12rem;font-weight:700;margin:28px 0 10px}
article p{margin-bottom:16px;color:#22303F}
article ul,article ol{margin:0 0 18px 22px}
article li{margin-bottom:8px;color:#22303F}
article table{width:100%;border-collapse:collapse;margin:18px 0 24px;font-size:.94rem}
article th{text-align:left;font-family:var(--disp);font-weight:700;padding:10px 12px;background:var(--paper);border-bottom:2px solid var(--line)}
article td{padding:10px 12px;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}
article blockquote{border-left:3px solid var(--blue);padding:6px 0 6px 18px;margin:0 0 18px;color:var(--slate);font-style:italic}

.answer-box{background:var(--blue-soft);border:1px solid #C7DBF8;border-left:4px solid var(--blue);border-radius:12px;padding:20px 22px;margin:0 0 30px}
.answer-box .lab{font-size:.72rem;font-weight:800;letter-spacing:.09em;text-transform:uppercase;color:var(--blue-dark);margin-bottom:6px}
.answer-box p{margin:0;font-size:1.02rem;color:var(--navy)}
.tip{background:var(--green-soft);border:1px solid #BCE3CC;border-radius:12px;padding:16px 18px;margin:0 0 18px;font-size:.95rem}
.warn{background:var(--amber-soft);border:1px solid #EBD3A4;border-radius:12px;padding:16px 18px;margin:0 0 18px;font-size:.95rem}

.faq-block{margin-top:10px}
details.faq{border:1px solid var(--line);border-radius:12px;background:var(--white);margin-bottom:10px;overflow:hidden}
details.faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 18px;font-family:var(--disp);font-weight:700;font-size:1rem}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"";width:9px;height:9px;border-right:2.5px solid var(--blue);border-bottom:2.5px solid var(--blue);transform:rotate(45deg);transition:transform .25s;flex-shrink:0}
details.faq[open] summary::after{transform:rotate(-135deg)}
details.faq .a{padding:0 18px 16px;color:var(--slate);font-size:.95rem}
details.faq .a p{margin-bottom:8px;color:var(--slate)}

.cta-band{background:var(--navy);border-radius:var(--radius);padding:30px 28px;margin:44px 0 0;color:#fff}
.cta-band h2{color:#fff;margin:0 0 8px;font-size:1.4rem}
.cta-band p{color:#AEBFD2;margin-bottom:18px}
.cta-band .small{font-size:.82rem;color:#8FA3BA;margin:10px 0 0}

.post-list{padding:52px 0 72px}
.post-card{display:block;text-decoration:none;color:inherit;border:1px solid var(--line);border-radius:var(--radius);padding:26px;margin-bottom:16px;transition:transform .25s,box-shadow .25s;background:var(--white)}
.post-card:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(14,27,44,.09)}
.post-card .date{font-size:.8rem;color:var(--slate);font-weight:600;letter-spacing:.04em;text-transform:uppercase}
.post-card h2{font-size:1.35rem;margin:8px 0 8px}
.post-card p{color:var(--slate);font-size:.97rem}
.post-card .more{color:var(--blue-dark);font-weight:700;font-size:.9rem}

.related{margin-top:44px;padding-top:26px;border-top:1px solid var(--line)}
.related h2{font-size:1.15rem;margin:0 0 12px}
.related ul{list-style:none;margin:0}
.related li{margin-bottom:8px}

footer.site{background:var(--navy);color:#8FA3BA;font-size:.85rem;margin-top:40px}
.foot-inner{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;padding:26px 0}
footer.site a{color:#AEBFD2;text-decoration:none;margin-left:16px}
footer.site a:hover{color:#fff}

@media(max-width:640px){
  body{font-size:16px}
  .nav-links{gap:14px;font-size:.84rem}
  .nav-links .hide-sm{display:none}
  article{padding:36px 0 52px}
  article td,article th{padding:8px}
  .foot-inner{flex-direction:column;align-items:flex-start;gap:10px}
  footer.site a{margin-left:0;margin-right:14px}
}