/* ============ tokens ============ */
:root{
  --navy:#0B1626; --navy-2:#101E33; --navy-3:#16273F; --navy-4:#1E3350;
  --ink:#141D29; --ink-2:#4A5768; --ink-3:#5F6B7A; --mist:#A8B8CA;
  --bg:#FFFFFF; --tint:#F5F8FC; --tint-2:#EDF2F9;
  --amber:#FF9000; --amber-2:#FFA733; --amber-deep:#A85800;
  --blue:#5E95FD; --blue-deep:#2461D8;
  --green:#12784A; --green-bg:#E4F5EB;
  --line:#E3E9F1; --line-2:#D3DCE8; --line-d:rgba(168,184,202,.2);
  --disp:"Barlow Condensed","Oswald","Arial Narrow","Helvetica Neue Condensed",system-ui,sans-serif;
  --body:"Barlow",system-ui,-apple-system,sans-serif;
  --max:1180px; --gut:24px;
  --r:10px; --r-lg:16px;
  --sh-1:0 1px 2px rgba(16,30,51,.05), 0 2px 8px -2px rgba(16,30,51,.06);
  --sh-2:0 4px 12px -4px rgba(16,30,51,.1), 0 12px 32px -12px rgba(16,30,51,.14);
  --sh-3:0 18px 48px -20px rgba(16,30,51,.3);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--body);background:var(--bg);color:var(--ink);font-size:17px;line-height:1.62;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden;-webkit-tap-highlight-color:rgba(255,144,0,.18)}
a,button,summary,label,input{touch-action:manipulation}
img{display:block;max-width:100%;height:auto}
a{color:var(--blue-deep)}
[id]{scroll-margin-top:96px}
::selection{background:var(--amber);color:var(--navy)}
:focus-visible{outline:2.5px solid var(--blue-deep);outline-offset:3px;border-radius:3px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--navy);color:#fff;padding:12px 20px;border-radius:0 0 8px 0;font-weight:600;text-decoration:none}
.skip:focus{left:0}

h1,h2{font-family:var(--disp);text-transform:uppercase;font-weight:700;line-height:.95;letter-spacing:.004em;text-wrap:balance}
h1{font-size:clamp(40px,5vw,66px)}
h2{font-size:clamp(32px,3.9vw,50px)}
h3{font-weight:700;line-height:1.28;letter-spacing:-.012em;font-size:20px}

/* ============ buttons ============ */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:600;font-size:15.5px;text-decoration:none;border-radius:7px;padding:14px 26px;border:1.5px solid transparent;cursor:pointer;font-family:var(--body);white-space:nowrap;
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),transform .14s var(--ease)}
.btn:active{transform:translateY(1px)}
.btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s var(--ease)}
.btn:hover svg{transform:translateX(3px)}
.btn-amber{background:var(--amber);color:#2A1A02;box-shadow:0 2px 0 var(--amber-deep),0 8px 22px -10px rgba(255,144,0,.8)}
.btn-amber:hover{background:var(--amber-2);box-shadow:0 2px 0 var(--amber-deep),0 12px 28px -10px rgba(255,144,0,.9)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-4)}
.btn-ghost{border-color:rgba(255,255,255,.32);color:#fff;backdrop-filter:blur(6px);background:rgba(255,255,255,.05)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.12)}
.btn-line{border-color:var(--line-2);color:var(--ink);background:#fff}
.btn-line:hover{border-color:var(--navy);background:var(--tint)}

/* ============ topbar + header ============ */
.topbar{background:var(--navy);color:var(--mist);font-size:13.5px;position:relative;z-index:80}
.topbar-in{max-width:var(--max);margin:0 auto;padding:8px var(--gut);display:flex;justify-content:space-between;gap:20px;align-items:center}
.topbar b{color:#E9EFF6;font-weight:500}
.topbar-right{display:flex;gap:24px;align-items:center}
.topbar a{color:var(--mist);text-decoration:none;display:inline-flex;align-items:center;gap:7px;font-weight:600;transition:color .15s}
.topbar a:hover{color:#fff}
.topbar a[data-phone-link]{min-height:44px;padding:0 4px;margin:-8px 0}
.topbar a svg{width:14px;height:14px;stroke:var(--amber);fill:none;stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}

.hdr{position:sticky;top:0;z-index:90;background:rgba(255,255,255,.88);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line);transition:box-shadow .25s var(--ease),background .25s var(--ease)}
.hdr.stuck{box-shadow:0 4px 20px -8px rgba(16,30,51,.18);background:rgba(255,255,255,.96)}
.hdr-in{max-width:var(--max);margin:0 auto;padding:0 var(--gut);height:72px;display:flex;align-items:center;gap:32px}
.mark{font-family:var(--disp);font-weight:700;font-size:22px;text-transform:uppercase;letter-spacing:.02em;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:11px;white-space:nowrap;min-width:0;flex:0 1 auto}
.mark i{width:10px;height:23px;background:var(--amber);display:inline-block;transform:skewX(-12deg);border-radius:1.5px;flex:none}
.hdr .mark{min-height:44px}
.hdr nav{margin-left:auto;display:flex;gap:6px;align-items:center}
.hdr nav>a,.dd>button{white-space:nowrap;position:relative;font-size:15.5px;font-weight:500;color:var(--ink);text-decoration:none;background:none;border:0;cursor:pointer;font-family:var(--body);padding:25px 12px;display:inline-flex;align-items:center;transition:color .15s}
.hdr nav>a::after{content:"";position:absolute;left:12px;right:12px;bottom:22px;height:2px;background:var(--amber);transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease)}
.hdr nav>a:hover::after{transform:scaleX(1)}
.hdr nav>a:hover,.dd>button:hover,.dd[data-open="true"]>button{color:var(--blue-deep)}
.dd{position:relative}
.dd>button::after{content:"";display:inline-block;margin-left:8px;width:6.5px;height:6.5px;border-right:1.8px solid currentColor;border-bottom:1.8px solid currentColor;transform:rotate(45deg) translate(-2px,-2px);transition:transform .25s var(--ease)}
.dd[data-open="true"]>button::after{transform:rotate(225deg) translate(-3px,-3px)}
.dd-menu{position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--sh-2);min-width:268px;padding:8px;opacity:0;visibility:hidden;transform:translateY(8px) scale(.98);transform-origin:top left;transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s}
.dd[data-open="true"] .dd-menu{opacity:1;visibility:visible;transform:none}
.dd-menu a{display:block;padding:11px 14px;border-radius:8px;font-size:15px;color:var(--ink);text-decoration:none;font-weight:600;transition:background .15s,color .15s}
.dd-menu a:hover{background:var(--tint);color:var(--blue-deep)}
.dd-menu small{display:block;color:var(--ink-3);font-size:12.5px;margin-top:2px;font-weight:400;line-height:1.4}
.hdr .btn{padding:11px 20px;font-size:15px;margin-left:10px}

/* mobile nav */
.burger{display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line-2);border-radius:9px;background:#fff;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:5px;transition:border-color .15s}
.burger:hover{border-color:var(--navy)}
.burger i{display:block;width:19px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s var(--ease),opacity .2s}
.burger[aria-expanded="true"] i:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] i:nth-child(2){opacity:0}
.burger[aria-expanded="true"] i:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mnav{position:fixed;inset:0;top:0;z-index:88;background:var(--navy);padding:88px 24px 32px;display:flex;flex-direction:column;gap:2px;overflow-y:auto;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s}
.mnav.on{opacity:1;visibility:visible;transform:none}
body.lock .hdr{background:#fff;box-shadow:0 4px 20px -8px rgba(16,30,51,.18)}
.mnav a{color:#fff;text-decoration:none;font-family:var(--disp);text-transform:uppercase;font-size:27px;font-weight:700;padding:15px 0;border-bottom:1px solid rgba(255,255,255,.1);letter-spacing:.01em}
.mnav a:last-of-type{border-bottom:0}
.mnav .btn{margin-top:22px;font-size:17px;padding:16px}
.mnav .mnav-foot{margin-top:auto;padding-top:26px;color:var(--mist);font-size:14.5px}
.mnav .mnav-foot a{font-family:var(--body);font-size:15px;text-transform:none;border:0;padding:6px 0;display:inline-block;color:var(--amber)}
body.lock{overflow:hidden}

/* ============ footer ============ */
footer{background:var(--navy);color:var(--mist);padding:66px 0 30px;font-size:15px}
.foot-grid{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.2fr);gap:44px;padding-bottom:38px;border-bottom:1px solid rgba(168,184,202,.16)}
.foot-grid>*{min-width:0}
.foot-brand .mark{font-size:20px;margin-bottom:15px;color:#fff}
.foot-brand p{max-width:36ch;line-height:1.6;color:#B6C4D4}
.foot-co{margin-top:13px;color:#8496AA;font-size:14px}
/* .foot-grid a makes every footer link a 44px flex block, which is right for
   the nav columns but wrong for this one, which sits mid-sentence */
.foot-brand .foot-co a{display:inline;min-height:0;padding:0;color:#C6D2DF;text-decoration:none;border-bottom:1px solid rgba(198,210,223,.4);transition:color .15s,border-color .15s}
.foot-brand .foot-co a:hover{color:#fff;border-bottom-color:#fff;transform:none}
.foot-badges{margin-top:20px;display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.foot-badges img{height:56px;width:auto}
.foot-grid b{display:block;color:#fff;font-weight:600;margin-bottom:15px;font-size:15px}
.foot-grid a{display:flex;align-items:center;min-height:44px;text-decoration:none;color:#B6C4D4;padding:5px 0;transition:color .15s,transform .15s var(--ease)}
.foot-grid a:hover{color:#fff;transform:translateX(3px)}
.foot-grid p{line-height:1.6;margin-bottom:10px;color:#B6C4D4}
.foot-bottom{display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;padding:24px 0 0;color:#B6C4D4;font-size:14px}
.foot-legal{display:flex;gap:24px;flex-wrap:wrap}
.foot-legal a{color:#B6C4D4;text-decoration:none;display:inline-flex;align-items:center;min-height:44px;transition:color .15s}
.foot-legal a:hover{color:#fff;text-decoration:underline}
.srcs{margin-top:24px;font-size:12.5px;color:#93A4B8;max-width:92ch;line-height:1.65}

/* ============ article pages ============ */
.pg-hero{background:var(--navy);color:#fff;padding:66px 0 58px;position:relative;overflow:hidden}
.pg-hero-bg{position:absolute;inset:0;object-fit:cover;width:100%;height:100%;opacity:.5}
.pg-hero-scrim{position:absolute;inset:0;background:linear-gradient(86deg,rgba(11,22,38,.97) 0%,rgba(11,22,38,.93) 44%,rgba(11,22,38,.72) 72%,rgba(11,22,38,.55) 100%)}
/* Below 900px the hero copy spans the full width, so the horizontal falloff
   would leave the deck sitting on the bright side of the photo. Flatten it. */
@media (max-width:900px){
  .pg-hero-bg{opacity:.42}
  .pg-hero-scrim{background:linear-gradient(180deg,rgba(11,22,38,.94) 0%,rgba(11,22,38,.9) 60%,rgba(11,22,38,.86) 100%)}
}
.pg-hero::after{content:"";position:absolute;top:-40%;right:-6%;width:46%;aspect-ratio:1;border-radius:50%;background:radial-gradient(circle,rgba(255,144,0,.12),transparent 70%);pointer-events:none}
.pg-hero-in{max-width:var(--max);margin:0 auto;padding:0 var(--gut);position:relative;z-index:2}
.crumb{font-size:13.5px;color:var(--mist);margin-bottom:18px;line-height:1}
.crumb a{color:var(--mist);text-decoration:none;display:inline-block;padding:14px 0;margin:-14px 0}
.crumb a:hover{color:#fff;text-decoration:underline}
.crumb span{margin:0 8px;opacity:.5}
.pg-hero h1{font-size:clamp(34px,4.4vw,56px);max-width:18ch;margin-bottom:20px}
.pg-hero .standfirst{font-size:18.5px;color:#C5D2E0;max-width:64ch}
.pg-hero .btn{margin-top:28px}

.pg-wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gut);display:grid;grid-template-columns:minmax(0,1fr) 268px;gap:56px;align-items:start}
.pg-body{padding:56px 0 72px;max-width:72ch;min-width:0}
.pg-body h2{font-family:var(--body);text-transform:none;font-size:27px;font-weight:700;letter-spacing:-.018em;line-height:1.25;margin:44px 0 16px}
.pg-body h2:first-child{margin-top:0}
.pg-body h3{font-size:19.5px;margin:30px 0 10px}
.pg-body p{margin-bottom:16px;color:var(--ink-2);font-size:17px}
.pg-body p strong,.pg-body li strong{color:var(--ink);font-weight:600}
.pg-body ul,.pg-body ol{margin:0 0 18px 0;padding-left:22px;color:var(--ink-2);font-size:17px}
.pg-body li{margin-bottom:9px}
.pg-body ul li::marker{color:var(--amber)}
.pg-body a{color:var(--blue-deep);text-underline-offset:2px}
.pg-body>a{font-weight:600}

.dtable{width:100%;border-collapse:collapse;margin:8px 0 26px;font-size:15.5px;display:block;overflow-x:auto;max-width:100%}
.dtable th,.dtable td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.dtable th{background:var(--tint);font-weight:700;color:var(--ink);font-size:12.5px;letter-spacing:.05em;text-transform:uppercase;white-space:nowrap}
.dtable td{color:var(--ink-2)}
.dtable tr:last-child td{border-bottom:0}
.dtable td:first-child{color:var(--ink);font-weight:600}

.callout{background:var(--tint);border:1px solid var(--line);border-left:4px solid var(--amber);border-radius:10px;padding:22px 26px;margin:26px 0}
.callout p:last-child{margin-bottom:0}
.callout b{display:block;margin-bottom:8px;color:var(--ink);font-size:16.5px}

.keynum{display:grid;grid-template-columns:repeat(3,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;margin:26px 0;box-shadow:var(--sh-1)}
.keynum div{padding:24px 22px;border-left:1px solid var(--line)}
.keynum div:first-child{border-left:0}
.keynum b{display:block;font-family:var(--disp);font-size:34px;line-height:1;color:var(--navy);margin-bottom:7px}
.keynum span{font-size:13.5px;color:var(--ink-2);line-height:1.45;display:block}

.src{font-size:13px;color:var(--ink-3);line-height:1.6;border-top:1px solid var(--line);padding-top:16px;margin-top:36px}

/* sidebar */
.pg-side{position:sticky;top:92px;padding:56px 0 40px;font-size:14.5px}
.side-card{background:var(--navy);color:#fff;border-radius:var(--r-lg);padding:24px;margin-bottom:20px}
.side-card b{display:block;font-family:var(--disp);text-transform:uppercase;font-size:19px;line-height:1.1;margin-bottom:9px}
.side-card p{color:#C5D2E0;font-size:14.5px;margin-bottom:16px}
.side-card .btn{width:100%;font-size:14.5px;padding:12px 16px}
.side-nav b{display:block;font-size:12px;letter-spacing:.11em;text-transform:uppercase;color:var(--ink-3);margin-bottom:12px;font-weight:700}
.side-nav a{display:flex;align-items:center;min-height:44px;padding:6px 0;color:var(--ink-2);text-decoration:none;line-height:1.35;border-bottom:1px solid var(--line)}
.side-nav a:last-child{border-bottom:0}
.side-nav a:hover,.side-nav a[aria-current="page"]{color:var(--blue-deep)}
.side-nav a[aria-current="page"]{font-weight:600}

/* related */
.related{background:var(--tint);border-top:1px solid var(--line);padding:56px 0}
.related-in{max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
.related h2{font-size:27px;font-family:var(--body);text-transform:none;letter-spacing:-.018em;margin-bottom:24px}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.rel-grid a{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;text-decoration:none;display:block;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.rel-grid a:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.rel-grid b{display:block;font-size:17px;color:var(--ink);margin-bottom:7px;letter-spacing:-.01em}
.rel-grid span{font-size:14.5px;color:var(--ink-2);line-height:1.5}

/* index of guides */
.hub-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;padding:56px 0 72px;max-width:var(--max);margin:0 auto}
.hub-grid a{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;text-decoration:none;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.hub-grid a:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.hub-grid b{display:block;font-size:19px;color:var(--ink);margin-bottom:8px;letter-spacing:-.012em}
.hub-grid span{font-size:15.5px;color:var(--ink-2);line-height:1.5}

@media(max-width:1080px){
  .pg-wrap{grid-template-columns:minmax(0,1fr);gap:0}
  .pg-side{position:static;padding:0 0 56px;max-width:520px}
  .pg-body{padding-bottom:40px}
  .hdr nav{display:none}
  .burger{display:flex;width:44px;height:44px}
  .hdr .btn{display:none}
  .hdr-in{height:66px;gap:12px}
  .mark{font-size:18px}
  .mark i{height:19px;width:8.5px}
  .topbar-in{justify-content:center}
  .topbar b{display:none}
  .rel-grid,.hub-grid{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:34px}
  .pg-hero{padding:48px 0 44px}
}
@media(max-width:680px){
  :root{--gut:18px}
  body{font-size:16.5px}
  .mark{font-size:16px;gap:8px}
  .tb-hrs{display:none}
  .keynum{grid-template-columns:1fr}
  .keynum div{border-left:0;border-top:1px solid var(--line)}
  .keynum div:first-child{border-top:0}
  .rel-grid,.hub-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:minmax(0,1fr);gap:30px}
  .foot-brand .mark{font-size:17px}
  .pg-body h2{font-size:23px}
  .pg-body{padding-top:40px}
  .callout{padding:20px}
}
@media(max-width:400px){
  .mark,.foot-brand .mark{font-size:14.5px;gap:7px}
  .tb-loc{display:none}
  .hdr-in{gap:8px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.001ms!important;animation-duration:.001ms!important}
}