/* ===== fonts ===== */
@font-face{font-family:"SF Pro Display";src:url("/assets/fonts/SF-Pro-Display-Regular.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"SF Pro Display";src:url("/assets/fonts/SF-Pro-Display-Medium.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"SF Pro Display";src:url("/assets/fonts/SF-Pro-Display-Bold.woff2") format("woff2");font-weight:700;font-style:normal;font-display:swap}

/* ===== base ===== */
:root{
  --ink:#152237;
  --ink-soft:#3C4A5E;
  --muted:#5a6b85;
  --blue:#0070F3;
  --blue-dark:#0057c2;
  --blue-soft:#eaf2fe;
  --blue-softer:#F5F9FF;
  --line:#E3E9F0;
  --bg-soft:#f4f7fb;
  --white:#ffffff;
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 1px 2px rgba(21,34,55,.04),0 8px 24px rgba(21,34,55,.06);
  --shadow-blue:0 4px 12px 0 #0070F359;
  --font:"SF Pro Display",-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}
*,*:before,*:after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--white);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
img,svg{vertical-align:middle}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--blue-dark);text-decoration:underline}
h1,h2,h3,h4{color:var(--ink);line-height:1.2;margin:0 0 .6em;font-weight:700}
h1{font-size:42px;letter-spacing:-.02em}
h2{font-size:30px;letter-spacing:-.015em;margin-top:0}
h3{font-size:21px}
p{margin:0 0 1em}
ul,ol{padding-left:1.25em}
code{font-family:var(--mono);font-size:.86em;background:var(--blue-softer);border:1px solid var(--line);border-radius:6px;padding:.1em .4em;color:var(--ink-soft);word-break:break-all}
.mono{font-family:var(--mono)}

.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

/* ===== header ===== */
.site-header{background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand-mark{width:42px;height:42px;border-radius:9px;background:#0066cc;display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}
.brand-text{line-height:1.1}
.brand-text b{display:block;font-size:19.5px;color:var(--ink);letter-spacing:-.01em}
.brand-text span{display:block;font-size:11.5px;color:var(--muted);letter-spacing:.02em}
.main-nav{display:flex;gap:4px;flex:1;min-width:0}
.main-nav a{color:var(--ink-soft);font-weight:500;font-size:14px;padding:8px 9px;border-radius:8px;white-space:nowrap}
.main-nav a:hover{background:var(--blue-softer);color:var(--blue);text-decoration:none}
.main-nav a[aria-current="page"]{color:var(--blue);background:var(--blue-soft)}
.header-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.pill{display:inline-flex;align-items:center;gap:7px;background:var(--white);border:1px solid var(--line);border-radius:100px;padding:7px 14px;font-size:13px;font-weight:500;color:var(--ink-soft);white-space:nowrap}
.pill .dot{width:8px;height:8px;border-radius:50%;background:#22c55e;flex:0 0 auto}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;cursor:pointer;font-family:var(--font);font-weight:700;text-decoration:none;border-radius:100px;transition:transform .08s ease,box-shadow .15s ease,background .15s ease}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--blue);color:#fff;padding:12px 22px;font-size:14.5px;box-shadow:var(--shadow-blue)}
.btn-primary:hover{background:var(--blue-dark);color:#fff;text-decoration:none;box-shadow:0 6px 16px #0070F373}
.btn-ghost{background:var(--white);color:var(--blue);border:1.5px solid var(--blue);padding:10px 20px;font-size:14.5px}
.btn-ghost:hover{background:var(--blue-soft);color:var(--blue-dark);text-decoration:none}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:42px;height:42px;cursor:pointer;padding:0;align-items:center;justify-content:center}

/* ===== breadcrumbs ===== */
.crumbs{padding:18px 0 0;font-size:13.5px;color:var(--muted)}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--blue)}
.crumbs .sep{margin:0 7px;color:#b9c5d6}

/* ===== page head ===== */
.page-head{padding:30px 0 8px}
.page-head .meta{display:flex;flex-wrap:wrap;gap:18px;color:var(--muted);font-size:13.5px;margin-bottom:18px}
.page-head .meta span{display:inline-flex;align-items:center;gap:6px}
.lead{font-size:19px;color:var(--ink-soft);line-height:1.6;max-width:760px}
.lead b{color:var(--ink)}

/* ===== mirrors block ===== */
.mirrors{background:var(--blue-softer);border:1px solid #dbe7f9;border-radius:var(--radius);padding:22px;margin:26px 0}
.mirrors-title{display:flex;align-items:center;gap:10px;font-weight:700;font-size:15px;color:var(--ink);margin-bottom:14px}
.mirrors-title svg{flex:0 0 auto}
.mirror-row{display:flex;align-items:stretch;gap:10px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px 14px;margin-bottom:10px;box-shadow:0 1px 2px rgba(21,34,55,.04)}
.mirror-row:last-child{margin-bottom:0}
.mirror-row .addr{flex:1;font-family:var(--mono);font-size:13.5px;line-height:1.5;color:var(--ink);word-break:break-all;user-select:all;padding:6px 2px}
.mirror-actions{display:flex;flex-direction:column;gap:6px;flex:0 0 auto}
.mirror-actions .row2{display:flex;gap:6px}
.btn-copy,.btn-open{display:inline-flex;align-items:center;gap:6px;font-family:var(--font);font-size:13px;font-weight:700;border-radius:100px;padding:8px 15px;border:0;cursor:pointer;text-decoration:none;transition:background .15s,color .15s}
.btn-copy{background:var(--blue);color:#fff}
.btn-copy:hover{background:var(--blue-dark);color:#fff}
.btn-copy.done{background:#16a34a}
.btn-open{background:var(--white);color:var(--blue);border:1.5px solid var(--blue)}
.btn-open:hover{background:var(--blue-soft);text-decoration:none}
.mirrors-note{font-size:13px;color:var(--muted);margin:12px 2px 0}
.mirrors-compact .addr{font-size:12.5px}

/* ===== sections ===== */
.section{padding:34px 0}
.section-tint{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.grid-2{display:grid;grid-template-columns:1fr;gap:18px}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.card h3{margin-bottom:.4em}
.card p:last-child{margin-bottom:0}
.card .card-ico{width:44px;height:44px;border-radius:12px;background:var(--blue-soft);color:var(--blue);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.callout{border:1px solid #cfe0fb;background:var(--blue-soft);border-radius:var(--radius-sm);padding:16px 18px;margin:20px 0;font-size:15px}
.callout.warn{border-color:#f5e0b8;background:#fff8ec}
.callout b{color:var(--ink)}
.callout p:last-child{margin-bottom:0}
.checklist{list-style:none;padding:0;margin:8px 0}
.checklist li{position:relative;padding:0 0 12px 32px}
.checklist li:before{content:"";position:absolute;left:0;top:2px;width:20px;height:20px;border-radius:50%;background:var(--blue-soft)}
.checklist li svg{position:absolute;left:0;top:2px}
.steps{counter-reset:step;list-style:none;padding:0;margin:16px 0}
.steps li{counter-increment:step;position:relative;padding:0 0 22px 52px}
.steps li:last-child{padding-bottom:0}
.steps li:before{content:counter(step);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;font-weight:700;font-size:15px;display:flex;align-items:center;justify-content:center}
.steps li:after{content:"";position:absolute;left:16px;top:36px;bottom:4px;width:2px;background:var(--line)}
.steps li:last-child:after{display:none}
.steps b{display:block;color:var(--ink);margin-bottom:2px}
.kbd{font-family:var(--mono);font-size:.85em;border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:.15em .5em;background:var(--bg-soft);color:var(--ink-soft)}

/* ===== details / faq ===== */
details.faq-item{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:10px;overflow:hidden}
details.faq-item summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 18px;font-weight:700;font-size:15.5px;color:var(--ink)}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary .chev{flex:0 0 auto;transition:transform .18s ease;color:var(--muted)}
details.faq-item[open] summary .chev{transform:rotate(180deg)}
details.faq-item .faq-body{padding:0 18px 16px;color:var(--ink-soft);font-size:15px}
details.faq-item .faq-body p:last-child{margin-bottom:0}

/* ===== pre / pgp ===== */
.pgp-box{background:#0f1b2d;color:#c8d6ea;border-radius:var(--radius-sm);padding:18px;overflow:auto;font-family:var(--mono);font-size:12px;line-height:1.55;white-space:pre-wrap;word-break:break-all;max-height:340px}
.fprint{font-family:var(--mono);font-size:15px;letter-spacing:.06em;background:var(--blue-softer);border:1px solid #dbe7f9;border-radius:var(--radius-sm);padding:14px 16px;word-break:break-all;color:var(--ink)}
.fprint small{display:block;font-family:var(--font);font-size:12.5px;color:var(--muted);letter-spacing:0;margin-top:6px}

/* ===== table ===== */
.table{width:100%;border-collapse:collapse;font-size:14.5px}
.table th{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;text-align:left;padding:10px 12px;border-bottom:2px solid var(--line)}
.table td{padding:12px;border-bottom:1px solid var(--line);color:var(--ink-soft);vertical-align:top}
.table tr:last-child td{border-bottom:0}

/* ===== CTA ===== */
.cta-band{background:linear-gradient(135deg,#0a2a5e,#0070F3);border-radius:20px;padding:34px 30px;color:#fff;margin:36px 0}
.cta-band h2{color:#fff}
.cta-band p{color:#d8e6fb;max-width:640px}
.cta-band .btn-primary{background:#fff;color:var(--blue-dark);box-shadow:none;margin-top:6px}
.cta-band .btn-primary:hover{background:#eaf2fe}

/* ===== footer ===== */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);margin-top:40px;padding:34px 0 26px;font-size:14px;color:var(--muted)}
.foot-grid{display:grid;grid-template-columns:1fr;gap:26px}
.foot-grid h4{font-size:13px;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-soft);margin-bottom:10px}
.foot-grid ul{list-style:none;padding:0;margin:0}
.foot-grid li{margin-bottom:7px}
.foot-grid a{color:var(--muted);font-size:14px}
.foot-grid a:hover{color:var(--blue)}
.foot-legal{border-top:1px solid var(--line);margin-top:26px;padding-top:16px;font-size:13px;line-height:1.6}
.foot-mirrors{font-family:var(--mono);font-size:11.5px;word-break:break-all;margin-top:8px;line-height:1.7}

/* ===== 404 ===== */
.err-head{padding:60px 0 10px}
.err-head .code{font-size:84px;font-weight:700;letter-spacing:-.04em;line-height:1;color:var(--blue)}

/* ===== misc ===== */
.muted{color:var(--muted)}
.small{font-size:13.5px}
.toc{background:var(--blue-softer);border:1px solid #dbe7f9;border-radius:var(--radius-sm);padding:16px 20px;margin:22px 0;font-size:14.5px}
.toc b{color:var(--ink)}
.toc a{display:inline-block;margin:0 14px 6px 0}
.skip{position:absolute;left:-9999px}
.skip:focus{position:static}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ===== mobile ===== */
@media (max-width:920px){
  h1{font-size:33px}
  h2{font-size:25px}
  .header-inner{height:60px;gap:14px}
  .header-right .btn,.header-right .pill{display:none}
  .nav-toggle{display:inline-flex}
  .main-nav{position:fixed;top:60px;left:0;right:0;background:var(--white);flex-direction:column;padding:10px 16px 16px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);display:none;z-index:40}
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 10px;font-size:16px}
  .grid-2{grid-template-columns:1fr}
  .mirror-row{flex-direction:column}
  .mirror-actions{flex-direction:row}
  .mirror-actions .row2{width:100%;justify-content:stretch}
  .mirror-actions .btn-copy,.mirror-actions .btn-open{flex:1;justify-content:center}
  .addr{user-select:text}
}
@media (min-width:921px){
  .grid-2{grid-template-columns:1fr 1fr}
  .grid-3{grid-template-columns:1fr 1fr 1fr}
  .foot-grid{grid-template-columns:2fr 1fr 1fr}
}
@media (max-width:380px){
  .wrap{padding:0 14px}
  h1{font-size:29px}
}