:root{
  --ink:#17333d;--muted:#5c7178;--navy:#092b3a;--navy2:#0d3d4d;--teal:#0f7b7d;
  --teal-dark:#096064;--sea:#dff4f0;--sea2:#eef9f7;--coral:#e46f51;--sand:#f6f0e4;
  --paper:#fffdfa;--line:#d7e3e1;--danger:#8d352d;--danger-bg:#fff1ee;--shadow:0 16px 44px rgba(9,43,58,.11);
  --radius:20px;--wrap:min(1500px,calc(100% - 40px));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65;overflow-wrap:anywhere}
img,svg{max-width:100%;height:auto}
a{color:var(--teal-dark);text-decoration-thickness:.08em;text-underline-offset:.18em}
a:hover{color:var(--coral)}
button,input,select,textarea{font:inherit}
.skip{position:absolute;left:-9999px;top:auto}
.skip:focus{left:16px;top:16px;z-index:9999;background:#fff;padding:10px 14px;border-radius:10px;box-shadow:var(--shadow)}
.wrap{width:var(--wrap);margin-inline:auto}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,253,250,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(9,43,58,.08)}
.nav-wrap{width:var(--wrap);margin:auto;min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--navy);min-width:0}
.brand:hover{color:var(--navy)}
.brand-mark{width:54px;height:54px;display:grid;place-items:center;flex:0 0 auto}
.brand-mark svg{display:block;width:54px;height:54px}
.brand-text{font-weight:850;letter-spacing:-.025em;font-size:1.18rem;line-height:1.08}
.brand-text small{display:block;font-weight:600;font-size:.72rem;color:var(--muted);letter-spacing:0;margin-top:5px}
.main-nav{display:flex;align-items:center;gap:8px}
.main-nav a{color:var(--ink);text-decoration:none;font-weight:750;padding:10px 13px;border-radius:999px}
.main-nav a:hover,.main-nav a[aria-current="page"]{background:var(--sea);color:var(--navy)}
.nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--navy);border-radius:12px;padding:9px 13px;font-weight:800}
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 64%,#135b67 100%);color:#fff;overflow:hidden}
.hero-inner{width:var(--wrap);margin:auto;min-height:540px;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(320px,.9fr);gap:50px;align-items:center;padding:72px 0}
.hero h1{font-size:clamp(3rem,7vw,6.6rem);line-height:.92;letter-spacing:-.065em;margin:.08em 0 .22em;max-width:10ch}
.hero p{font-size:clamp(1.08rem,2vw,1.35rem);max-width:690px;color:#d8edf0}
.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:.78rem!important;font-weight:900;color:var(--coral)!important;margin:0 0 10px}
.hero-art{display:grid;place-items:center}
.hero-art-svg{filter:drop-shadow(0 30px 30px rgba(0,0,0,.2))}
.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;border:0;border-radius:999px;padding:13px 18px;font-weight:850;cursor:pointer}
.btn-primary{background:var(--coral);color:#fff}
.btn-primary:hover{background:#c9563d;color:#fff}
.btn-secondary{background:#fff;color:var(--navy)}
.btn-secondary:hover{background:var(--sea);color:var(--navy)}
.section{padding:72px 0}
.section.alt{background:var(--sea2)}
.section.sand{background:var(--sand)}
.section-head{max-width:860px;margin-bottom:34px}
.section-head h2{font-size:clamp(2rem,4vw,3.4rem);line-height:1.05;letter-spacing:-.045em;margin:.15em 0}
.section-head p{color:var(--muted);font-size:1.08rem}
.grid{display:grid;gap:20px}
.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 8px 28px rgba(9,43,58,.05)}
.card h2,.card h3{margin:.25em 0 .4em;line-height:1.15;letter-spacing:-.025em}
.card p{color:var(--muted)}
.card-link{display:block;text-decoration:none;color:var(--ink);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.card-link:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#9fcfca;color:var(--ink)}
.icon-tile{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:var(--sea);font-size:1.45rem;font-weight:900;color:var(--navy)}
.tag{display:inline-flex;align-items:center;border-radius:999px;padding:5px 10px;background:var(--sea);color:var(--teal-dark);font-size:.74rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em}
.quick-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.quick-stat{border-left:4px solid var(--coral);padding:10px 18px;background:#fff;border-radius:0 14px 14px 0}
.quick-stat strong{display:block;font-size:1.2rem;color:var(--navy)}
.quick-stat span{color:var(--muted);font-size:.93rem}
.page-hero{background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff}
.page-head{width:min(1040px,calc(100% - 40px));margin:auto;padding:58px 0}
.page-head h1{font-size:clamp(2.35rem,6vw,4.9rem);line-height:1;letter-spacing:-.055em;margin:.18em 0}
.page-head>p:not(.eyebrow){font-size:1.16rem;color:#d8edf0;max-width:800px}
.breadcrumbs{font-size:.88rem;color:#b8d9dc;margin-bottom:24px;display:flex;flex-wrap:wrap;gap:8px}
.breadcrumbs a{color:#e8f7f6}
.content-layout{width:min(1240px,calc(100% - 40px));margin:52px auto 80px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:42px;align-items:start}
.prose{min-width:0}
.prose h2{font-size:clamp(1.65rem,3vw,2.45rem);line-height:1.13;letter-spacing:-.035em;margin:2.1em 0 .6em;color:var(--navy);scroll-margin-top:110px}
.prose h3{font-size:1.3rem;color:var(--navy);margin:1.7em 0 .5em}
.prose p,.prose li{font-size:1.03rem}
.article-lead{font-size:1.28rem!important;line-height:1.55;color:#36545d;margin-top:0}
.byline{display:flex;flex-wrap:wrap;gap:10px 22px;border-block:1px solid var(--line);padding:14px 0;margin:22px 0 28px;color:var(--muted);font-size:.9rem}
.notice{border-left:5px solid var(--teal);background:var(--sea2);padding:18px 20px;border-radius:0 14px 14px 0;margin:26px 0}
.notice.sea{background:var(--sea)}
.notice.danger{border-color:var(--danger);background:var(--danger-bg);color:#682c27}
.notice.sand{border-color:#c89e48;background:#fff8e6}
.check-list,.x-list,.step-list{padding-left:0;list-style:none}
.check-list li,.x-list li{position:relative;padding-left:34px;margin:.75em 0}
.check-list li::before{content:"✓";position:absolute;left:0;top:.02em;width:23px;height:23px;border-radius:50%;display:grid;place-items:center;background:var(--sea);color:var(--teal-dark);font-weight:900}
.x-list li::before{content:"×";position:absolute;left:0;top:.02em;width:23px;height:23px;border-radius:50%;display:grid;place-items:center;background:var(--danger-bg);color:var(--danger);font-weight:900}
.step-list{counter-reset:steps}
.step-list li{counter-increment:steps;position:relative;padding:2px 0 18px 50px;margin:0 0 12px;border-bottom:1px solid var(--line)}
.step-list li::before{content:counter(steps);position:absolute;left:0;top:-2px;width:34px;height:34px;border-radius:12px;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:900}
.sidebar{position:sticky;top:104px;display:grid;gap:18px}
.sidebar .card{box-shadow:none}
.toc a{display:block;padding:8px 0;border-bottom:1px solid var(--line);text-decoration:none;font-weight:700}
.toc a:last-child{border-bottom:0}
.related{margin-top:54px;padding-top:14px;border-top:1px solid var(--line)}
.link-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.link-list a{display:block;padding:14px 16px;background:var(--sea2);border-radius:12px;text-decoration:none;font-weight:750}
.filter-bar{display:flex;flex-wrap:wrap;gap:12px;align-items:end;margin:22px 0 30px}
.field{display:grid;gap:7px}
.field label{font-weight:800;color:var(--navy)}
.field input,.field select,.field textarea{width:100%;border:1px solid #b9cdca;border-radius:12px;padding:12px;background:#fff;color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{outline:3px solid rgba(15,123,125,.2);border-color:var(--teal)}
.search-field{flex:1 1 300px}
.guide-count{color:var(--muted);font-weight:700}
.tool-shell{width:min(1100px,calc(100% - 40px));margin:48px auto 80px}
.tool-panel{background:var(--sea2);border:1px solid #bcded9;border-radius:24px;padding:28px;margin-bottom:34px}
.form-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.tool-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.tool-actions button{border:0;border-radius:999px;padding:12px 18px;background:var(--coral);color:#fff;font-weight:850;cursor:pointer}
.tool-actions button.secondary{background:#fff;color:var(--navy);border:1px solid var(--line)}
.result{margin-top:20px;padding:20px;background:#fff;border-radius:16px;min-height:70px}
.result .big{display:block;font-size:1.45rem;color:var(--navy);margin-bottom:8px}
.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:12px}
.result-box{padding:14px;background:var(--sea2);border-radius:12px}
.checklist{display:grid;gap:10px;margin-top:18px}
.check-row{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px}
.check-row input{width:20px;height:20px;margin-top:3px}
.data-table{width:100%;border-collapse:collapse;margin:22px 0;display:block;overflow-x:auto}
.data-table th,.data-table td{border:1px solid var(--line);padding:11px 13px;text-align:left;min-width:160px}
.data-table th{background:var(--navy);color:#fff}
.data-table tr:nth-child(even) td{background:var(--sea2)}
.definition-list{display:grid;grid-template-columns:220px 1fr;border-top:1px solid var(--line)}
.definition-list dt,.definition-list dd{margin:0;padding:14px 12px;border-bottom:1px solid var(--line)}
.definition-list dt{font-weight:900;color:var(--navy)}
.site-footer{background:var(--navy);color:#dcebed;padding:58px 0 24px}
.site-footer a{color:#fff}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}
.footer-grid h2,.footer-grid h3{color:#fff}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin:.55em 0}
.footer-note{font-size:.9rem;color:#b7d1d5}
.footer-bottom{margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.18);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:.87rem;color:#bdd3d6}
.empty-state{display:none;padding:24px;background:var(--sand);border-radius:16px}
.mini-note{font-size:.88rem;color:var(--muted)}
.callout-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.number{font-size:2.5rem;font-weight:950;color:var(--coral);line-height:1}
@media(max-width:1050px){
 .grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}
 .grid.three,.callout-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .hero-inner{grid-template-columns:1fr .7fr}
 .content-layout{grid-template-columns:minmax(0,1fr)}
 .sidebar{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}
 .quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:760px){
 :root{--wrap:min(100% - 28px,1500px)}
 .nav-wrap{min-height:70px}
 .brand-mark,.brand-mark svg{width:46px;height:46px}
 .brand-text{font-size:1rem}
 .brand-text small{display:none}
 .nav-toggle{display:block}
 .main-nav{display:none;position:absolute;left:14px;right:14px;top:70px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:10px;flex-direction:column;align-items:stretch}
 .main-nav.is-open{display:flex}
 .main-nav a{padding:12px}
 .hero-inner{grid-template-columns:1fr;min-height:auto;padding:56px 0}
 .hero-art{max-width:420px;margin:auto}
 .section{padding:52px 0}
 .grid.two,.grid.three,.grid.four,.callout-grid,.quick-grid,.form-grid,.result-grid,.footer-grid,.sidebar,.link-list{grid-template-columns:1fr}
 .page-head{width:min(100% - 28px,1040px);padding:44px 0}
 .content-layout,.tool-shell{width:min(100% - 28px,1240px);margin-top:34px}
 .footer-grid{gap:24px}
 .definition-list{grid-template-columns:1fr}
 .definition-list dt{padding-bottom:3px;border-bottom:0}
 .definition-list dd{padding-top:3px}
}
@media print{
 .site-header,.site-footer,.sidebar,.button-row,.tool-actions,.skip{display:none!important}
 body{background:#fff;color:#000}
 .page-hero{background:#fff;color:#000}
 .page-head>p:not(.eyebrow),.breadcrumbs a{color:#000}
 .tool-shell,.content-layout{width:100%;margin:0}
 .tool-panel,.card,.result{box-shadow:none;border:1px solid #aaa}
 a{color:#000;text-decoration:none}
}