:root{--bg:#f6f8fa;--surface:#fff;--text:#1f2633;--muted:#5a6572;--brand:#2f5ba8;--accent:#c97b3d;--border:#e2e8f0;--code-bg:#0f172a;--code-text:#e2e8f0;--radius:10px;}
*{box-sizing:border-box;}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;line-height:1.65;color:var(--text);background:var(--bg);}
a{color:var(--brand);text-decoration:none;}a:hover{text-decoration:underline;}
.container{max-width:1080px;margin:0 auto;padding:0 20px;}
.site-header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20;}
.nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap;padding:14px 0;}
.nav-brand{font-weight:800;font-size:1.15rem;color:var(--text);margin-right:12px;display:flex;align-items:center;gap:8px;}
.nav-brand:hover{text-decoration:none;}
.nav-brand .logo{width:20px;height:20px;display:inline-block;background:linear-gradient(135deg,var(--brand),#6a7fdb);border-radius:5px;}
.nav-tag{font-size:.72rem;color:var(--muted);font-weight:500;margin-right:auto;}
.nav a.nav-link{color:var(--muted);font-weight:600;font-size:.92rem;padding:6px 10px;border-radius:7px;}
.nav a.nav-link:hover{background:var(--bg);color:var(--text);text-decoration:none;}
.nav a.nav-link.active{color:var(--brand);background:#eef4ff;}
.nav-toggle-wrap{display:flex;align-items:center;gap:6px;}
.hero{padding:56px 0 40px;text-align:center;}
.hero h1{font-size:clamp(1.9rem,4vw,3rem);margin:0 0 12px;letter-spacing:-.02em;line-height:1.15;}
.hero .subtitle{font-size:clamp(1rem,2vw,1.2rem);color:var(--muted);max-width:720px;margin:0 auto 28px;}
.hero .cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;}
.btn{display:inline-block;padding:11px 20px;border-radius:9px;font-weight:700;font-size:.95rem;}
.btn-primary{background:var(--brand);color:#fff;}.btn-primary:hover{background:#274a91;text-decoration:none;}
.btn-ghost{border:1px solid var(--border);color:var(--text);background:var(--surface);}.btn-ghost:hover{background:var(--bg);text-decoration:none;}
main{min-height:60vh;}
.page-content{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 1px 3px rgba(16,24,40,.08);padding:34px 38px;margin-top:26px;}
.page-content h1{margin-top:0;font-size:2rem;letter-spacing:-.01em;}
.page-content h2{font-size:1.45rem;margin:2rem 0 .6rem;padding-bottom:.3rem;border-bottom:1px solid var(--border);}
.page-content h3{font-size:1.12rem;margin:1.5rem 0 .4rem;color:#243049;}
.page-content p{color:#333c4c;margin:.7rem 0 1rem;}
.section-kicker{text-transform:uppercase;letter-spacing:.08em;font-size:.75rem;font-weight:700;color:var(--brand);margin-bottom:4px;}
.breadcrumbs{font-size:.85rem;color:var(--muted);margin:20px 0 -8px;}
.breadcrumbs a{color:var(--muted);}.breadcrumbs a:hover{color:var(--brand);}
.breadcrumbs .sep{margin:0 6px;color:#b5bfcc;}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:0 1px 3px rgba(16,24,40,.08);display:flex;flex-direction:column;transition:transform .12s,box-shadow .12s;}
.card:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(16,24,40,.12);}
.card h3{margin:0 0 6px;font-size:1.05rem;}
.card p{color:var(--muted);font-size:.9rem;margin:0 0 12px;flex:1;}
.card .meta{font-size:.75rem;color:var(--muted);}
ul.tools{list-style:none;padding:0;margin:0;}
.tool-item{display:flex;gap:14px;padding:16px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);margin-bottom:12px;box-shadow:0 1px 3px rgba(16,24,40,.08);align-items:flex-start;}
.tool-item .body{flex:1;}
.tool-item h3{margin:0 0 4px;font-size:1.05rem;}
.tool-item p{margin:2px 0 6px;color:var(--muted);font-size:.92rem;}
.tool-item .tags{font-size:.75rem;color:var(--muted);}
.tag{display:inline-block;background:#eef4ff;color:var(--brand);border-radius:5px;padding:1px 8px;font-weight:600;margin-right:6px;}
pre{background:var(--code-bg);color:var(--code-text);padding:16px 18px;border-radius:9px;overflow-x:auto;font-size:.86rem;line-height:1.6;margin:12px 0 18px;}
code{font-family:SFMono-Regular,ui-monospace,Cascadia Code,Menlo,Consolas,monospace;}
p code,li code{background:#eef1f6;color:#b0406c;padding:1px 6px;border-radius:5px;font-size:.88em;}
.tbl-wrap{overflow-x:auto;margin:14px 0 18px;}
table{border-collapse:collapse;width:100%;font-size:.9rem;}
th,td{text-align:left;padding:9px 12px;border:1px solid var(--border);}
th{background:#f4f6f9;font-weight:700;}
.callout{border-left:4px solid var(--brand);background:#eef4ff;padding:12px 16px;border-radius:0 8px 8px 0;margin:16px 0;font-size:.93rem;}
.callout.warn{border-left-color:var(--accent);background:#fdf3ea;}
.faq details{border:1px solid var(--border);border-radius:9px;padding:12px 16px;margin-bottom:10px;background:var(--surface);}
.faq summary{font-weight:700;cursor:pointer;font-size:.98rem;}
.faq details p{margin:10px 0 2px;color:#3b4454;}
.cat-chip{display:inline-block;background:#eef4ff;color:var(--brand);font-weight:700;font-size:.75rem;padding:3px 10px;border-radius:20px;}
.updated{color:var(--muted);font-size:.83rem;margin-top:10px;font-style:italic;}
.site-footer{border-top:1px solid var(--border);background:var(--surface);margin-top:60px;padding:28px 0;text-align:center;color:var(--muted);font-size:.88rem;}
.site-footer .links{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;margin-bottom:8px;}
.site-footer a{color:var(--muted);font-weight:600;}.site-footer a:hover{color:var(--brand);}
body.dark-mode{--bg:#0f1419;--surface:#161d26;--text:#e6edf5;--muted:#94a2b3;--border:#263241;--code-bg:#0b1016;}
body.dark-mode .page-content p,body.dark-mode .page-content li{color:#c7d2df;}
body.dark-mode .page-content h3{color:#dbe6f2;}
body.dark-mode p code,body.dark-mode li code{background:#232e3c;color:#e58db0;}
body.dark-mode th{background:#1c2531;}
body.dark-mode .tool-item h3,body.dark-mode .card h3,body.dark-mode .tool-item a,body.dark-mode .card a{color:#dbe6f2;}
body.dark-mode .callout{background:#1a2740;}
body.dark-mode .callout.warn{background:#2b2217;border-left-color:#d8924a;}
body.dark-mode .tag{background:#1a2740;color:#8fb0ff;}
body.dark-mode .cat-chip{background:#1a2740;color:#8fb0ff;}
.cta-band{background:linear-gradient(135deg,#1c2b4a,#2f5ba8);color:#fff;border-radius:var(--radius);padding:38px 34px;margin:40px 0 8px;text-align:center;box-shadow:0 8px 24px rgba(16,24,40,.18);}
.cta-band h2{margin:0 0 6px;color:#fff;font-size:1.6rem;}
.cta-band p{color:#cdd9ee;max-width:600px;margin:0 auto 18px;}
.cta-form{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;max-width:480px;margin:0 auto;}
.cta-form input[type=email]{flex:1 1 220px;padding:12px 14px;border:none;border-radius:8px;font-size:.95rem;min-width:0;}
.cta-form button{padding:12px 22px;border:none;border-radius:8px;background:#ffd166;color:#1c2b4a;font-weight:800;font-size:.95rem;cursor:pointer;}
.cta-form button:hover{background:#ffd166;filter:brightness(1.05);}
.cta-note{font-size:.78rem;color:#97a9cc;margin-top:12px;}
.form-status{min-height:1.4em;font-weight:600;margin-top:8px;}
body.dark-mode .cta-band{background:linear-gradient(135deg,#12203a,#2a4a86);}
@media(max-width:640px){.page-content{padding:22px 18px;}.tool-item{flex-direction:column;}.nav-tag{display:none;}.nav a.nav-link{font-size:.85rem;padding:5px 7px;}}