:root{
  --text:#1E2530;--soft:#586271;--faint:#8C95A3;--line:#E7E9ED;
  --bg:#FFFFFF;--panel:#F7F8FA;--blue:#1F4E8C;--blue-deep:#173C6E;
  --serif:'IBM Plex Serif',serif;--sans:'IBM Plex Sans',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--text);background:var(--bg);font-size:16.5px;line-height:1.65}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-radius:2px}
.btn{display:inline-block;text-align:center;font-weight:600;font-size:.92rem;background:var(--blue);color:#fff;border-radius:6px;padding:11px 18px;transition:background .15s}
.btn:hover{background:var(--blue-deep)}
.btn.ghost{background:transparent;color:var(--blue);border:1.5px solid var(--blue)}
.btn.ghost:hover{background:var(--blue);color:#fff}

/* ---------- NAV ---------- */
.nav{background:var(--bg);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.nav-inner{max-width:1100px;margin:0 auto;padding:0 24px;height:62px;display:flex;align-items:center;gap:32px}
.logo img{height:30px;width:auto;display:block}
.logo b{font-family:var(--serif);font-weight:600;font-size:1.25rem}
.nav-links{display:flex;gap:26px;margin-left:auto;align-items:center}
.nav-links a{font-size:.9rem;font-weight:500;color:var(--soft);padding:20px 0;border-bottom:2px solid transparent;transition:color .15s,border-color .15s}
.nav-links a:hover{color:var(--text);border-bottom-color:var(--text)}
.nav-links a[aria-current]{color:var(--text);border-bottom-color:var(--blue)}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:6px;padding:8px 12px;font:inherit;font-size:.85rem;font-weight:600;color:var(--text);cursor:pointer}

/* ---------- HERO ---------- */
.hero{max-width:1100px;margin:0 auto;padding:56px 24px 52px;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(330px,.85fr);gap:64px;align-items:start}
.hero.single{grid-template-columns:1fr;max-width:740px}
.crumb{font-size:.82rem;color:var(--faint);margin-bottom:20px}
.crumb a:hover{color:var(--soft);text-decoration:underline;text-underline-offset:3px}
h1{font-family:var(--serif);font-weight:600;font-size:clamp(2.05rem,4.1vw,2.85rem);line-height:1.16;letter-spacing:-0.012em;margin-bottom:18px}
.dek{font-size:1.12rem;color:var(--soft);max-width:52ch;margin-bottom:28px}
.byline{display:flex;align-items:center;gap:12px;font-size:.86rem;color:var(--soft);padding-top:22px;border-top:1px solid var(--line);max-width:52ch}
.byline img{width:38px;height:38px;border-radius:50%;object-fit:cover;background:var(--panel)}
.byline .who b{color:var(--text);font-weight:600}

/* ---------- FACTS PANEL ---------- */
.facts{border:1px solid var(--line);border-radius:8px;background:var(--bg);overflow:hidden}
.facts-head{display:flex;justify-content:space-between;align-items:baseline;padding:14px 20px;border-bottom:1px solid var(--line);background:var(--panel)}
.facts-head .t{font-size:.78rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase}
.facts-head .when{font-size:.76rem;color:var(--faint)}
.facts-row{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:12px 20px;border-bottom:1px solid var(--line);font-size:.92rem}
.facts-row:last-of-type{border-bottom:none}
.facts-row .k{color:var(--soft)}
.facts-row .v{font-weight:600;text-align:right;font-feature-settings:"tnum"}
.facts-row .v small{display:block;font-weight:400;color:var(--faint);font-size:.76rem}
.facts-foot{padding:15px 20px;border-top:1px solid var(--line)}
.facts-foot .btn{display:block}
.facts-foot p{margin-top:10px;text-align:center;font-size:.76rem}
.facts-foot p a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}

/* ---------- ROUTER (persona cards) ---------- */
.router{margin-top:1.6em;display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.router a{border:1px solid var(--line);border-radius:8px;padding:16px;display:block;transition:border-color .15s,box-shadow .15s}
.router a:hover{border-color:var(--blue);box-shadow:0 1px 6px rgba(31,78,140,.12)}
.router b{display:block;font-size:.95rem;margin-bottom:4px}
.router span{font-size:.82rem;color:var(--soft);display:block;margin-bottom:10px}
.router .act{font-size:.84rem;font-weight:600;color:var(--blue)}

/* ---------- ARTICLE ---------- */
.article{max-width:1100px;margin:0 auto;padding:0 24px 80px;display:grid;grid-template-columns:minmax(0,680px) minmax(260px,1fr);gap:64px}
.article.single{grid-template-columns:minmax(0,740px);justify-content:center}
.prose>*+*{margin-top:1.15em}
.prose h2{font-family:var(--serif);font-weight:600;font-size:1.65rem;letter-spacing:-0.008em;line-height:1.25;margin-top:2.2em;padding-top:1.2em;border-top:1px solid var(--line)}
.prose h3{font-family:var(--serif);font-weight:600;font-size:1.28rem;margin-top:2em}
.prose h3 .stepnum{color:var(--faint);font-family:var(--sans);font-weight:500;font-size:.78rem;letter-spacing:.07em;text-transform:uppercase;display:block;margin-bottom:4px}
.prose p,.prose li{color:#333B47}
.prose a{color:var(--blue);text-decoration:underline;text-decoration-color:#BFCCDF;text-underline-offset:3px}
.prose a:hover{text-decoration-color:var(--blue)}
/* a paragraph that is just a (non-YouTube) link -> centered button */
.prose p.link-btn{text-align:center;margin:1.8em 0}
.prose p.link-btn a{display:inline-block;color:#fff;text-decoration:none;background:var(--blue);font-weight:600;font-size:.92rem;border-radius:6px;padding:11px 20px;transition:background .15s}
.prose p.link-btn a:hover{background:var(--blue-deep);text-decoration:none}
.prose ul,.prose ol{padding-left:1.2em}
.prose li+li{margin-top:.5em}
.prose img{max-width:100%;height:auto;border-radius:8px;display:block;margin:1.4em 0}
.prose figure figcaption{font-size:.82rem;color:var(--faint);margin-top:6px;text-align:center}
.prose blockquote{border-left:3px solid var(--line);padding-left:16px;color:var(--soft);font-style:italic}
.prose code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.88em;background:var(--panel);padding:2px 5px;border-radius:4px}
.prose pre{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:16px;overflow-x:auto}
.prose pre code{background:none;padding:0}
.prose table{width:100%;border-collapse:collapse;font-size:.92rem}
.prose th{text-align:left;font-weight:600;border-bottom:1px solid var(--text);padding:0 14px 9px}
.prose td{padding:12px 14px;border-bottom:1px solid var(--line)}
.note{font-size:.86rem;color:var(--soft);border-left:2px solid var(--line);padding-left:14px}

.steps-index{border:1px solid var(--line);border-radius:8px;overflow:hidden;margin-top:1.4em}
.steps-index a{display:flex;gap:14px;align-items:baseline;padding:12px 18px;border-bottom:1px solid var(--line);font-size:.95rem;font-weight:500;transition:background .12s;color:var(--text);text-decoration:none}
.steps-index a:last-child{border-bottom:none}
.steps-index a:hover{background:var(--panel)}
.steps-index .n{font-feature-settings:"tnum";color:var(--faint);font-size:.85rem;width:1.4em}

/* ---------- COMPARISON TABLE ---------- */
.cmp{width:100%;border-collapse:collapse;font-size:.92rem;margin-top:1.4em}
.cmp caption{caption-side:top;text-align:left;font-size:.78rem;color:var(--faint);padding-bottom:8px}
.cmp th{text-align:left;font-weight:600;font-size:.76rem;letter-spacing:.05em;text-transform:uppercase;color:var(--soft);border-bottom:1px solid var(--text);padding:0 14px 9px}
.cmp td{padding:16px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
.cmp td:first-child,.cmp th:first-child{padding-left:0}
.cmp tr:hover td{background:var(--panel)}
.cmp .name{font-weight:600}
.cmp .name small{display:block;font-weight:400;color:var(--faint);font-size:.78rem}
.cmp .badge{display:inline-block;font-size:.66rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--blue);border:1px solid var(--blue);border-radius:4px;padding:2px 7px;margin-bottom:5px}
.cmp .price{font-feature-settings:"tnum";white-space:nowrap;font-weight:600}
.cmp .price small{display:block;font-weight:400;color:var(--faint);font-size:.76rem}
.cmp .btn{white-space:nowrap;padding:10px 16px;font-size:.86rem}
.cmp .sub{display:block;font-size:.72rem;color:var(--faint);margin-top:5px;text-align:center}

.callout{border:1px solid var(--line);border-left:3px solid var(--blue);border-radius:0 8px 8px 0;background:var(--panel);padding:18px 20px;font-size:.93rem;margin-top:1.6em}
.callout .tag{font-size:.7rem;letter-spacing:.07em;text-transform:uppercase;color:var(--faint);display:block;margin-bottom:6px}
.callout a{color:var(--blue);font-weight:600;text-decoration:underline;text-underline-offset:3px}

/* ---------- CLOSER ---------- */
.closer{border:1px solid var(--line);border-radius:8px;padding:26px;margin-top:2.4em;text-align:center;background:var(--panel)}
.closer h2{font-family:var(--serif);font-weight:600;font-size:1.35rem;margin:0 0 8px;border:none;padding:0}
.closer p{color:var(--soft);font-size:.95rem;max-width:46ch;margin:0 auto 18px}
.closer .row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---------- SIDEBAR ---------- */
.side{font-size:.9rem}
.side .stick{position:sticky;top:86px;display:flex;flex-direction:column;gap:16px}
.side .box{border:1px solid var(--line);border-radius:8px;padding:18px 20px}
.side h4{font-size:.78rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--soft);margin-bottom:12px}
.side .toc a{display:block;padding:7px 0;color:var(--soft);border-bottom:1px solid var(--line)}
.side .toc a:last-child{border-bottom:none}
.side .toc a:hover{color:var(--blue)}
.side .offer{background:var(--bg)}
.side .offer .tag{font-size:.68rem;letter-spacing:.07em;text-transform:uppercase;color:var(--faint);display:block;margin-bottom:8px}
.side .offer b{display:block;font-size:1rem;margin-bottom:4px}
.side .offer p{font-size:.84rem;color:var(--soft);margin-bottom:14px}
.side .offer .btn{display:block;font-size:.88rem}

/* ---------- FAQ ---------- */
details{border-bottom:1px solid var(--line);padding:4px 0}
details summary{font-weight:600;cursor:pointer;padding:12px 0;list-style:none;display:flex;justify-content:space-between;gap:16px}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";color:var(--faint);font-weight:400}
details[open] summary::after{content:"–"}
details p{padding:0 0 14px;color:#333B47}

.footer{border-top:1px solid var(--line);background:var(--panel)}
.footer-inner{max-width:1100px;margin:0 auto;padding:36px 24px;font-size:.83rem;color:var(--faint);display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.footer a{color:var(--soft)}
.footer a:hover{color:var(--blue)}

@media(max-width:920px){
  .hero{grid-template-columns:1fr;gap:38px;padding-top:34px}
  .article{grid-template-columns:1fr}
  .side{display:none}
  .nav-links{display:none}
  .nav-links.open{display:flex;flex-direction:column;position:absolute;top:62px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--line);padding:12px 24px;gap:0}
  .nav-links.open a{padding:12px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block}
  .router{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* ---------- ADS ---------- */
.ad{margin:1.9em 0;text-align:center;min-height:1px}
.ad-label{font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);display:block;margin-bottom:7px}
.ad ins{margin:0 auto}

/* ---------- LOGO IMAGE ---------- */
.logo .logo-img{height:32px;width:auto;display:block}

/* ---------- NAV SEARCH ---------- */
.nav-search{font-size:1.15rem;line-height:1;color:var(--soft);padding:20px 0;cursor:pointer}
.nav-search:hover{color:var(--blue)}
.search-box{display:none;border-bottom:1px solid var(--line);background:var(--bg)}
.search-box.open{display:block}
.search-box input{display:block;max-width:1100px;margin:0 auto;width:100%;padding:15px 24px;border:none;font:inherit;font-size:1rem;background:transparent;outline:none}

/* ---------- FOOTER (multi-column) ---------- */
.footer-cols{max-width:1100px;margin:0 auto;padding:48px 24px 28px;display:grid;grid-template-columns:repeat(4,1fr);gap:40px}
.fcol-title{font-family:var(--serif);font-size:1rem;font-weight:600;color:var(--text);margin-bottom:15px}
.fcol .fmenu{list-style:none;padding:0;margin:0}
.fcol .fmenu li{margin:0 0 9px}
.fcol .fmenu a{font-size:.88rem;color:var(--soft)}
.fcol .fmenu a:hover{color:var(--blue)}
.fcol p{font-size:.86rem;color:var(--soft);line-height:1.62}
.footer-bottom{border-top:1px solid var(--line)}
.footer-bottom-inner{max-width:1100px;margin:0 auto;padding:18px 24px;font-size:.82rem;color:var(--faint);display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}
.footer-bottom-inner a{color:var(--soft)}
.footer-bottom-inner a:hover{color:var(--blue)}
@media(max-width:920px){.footer-cols{grid-template-columns:repeat(2,1fr);gap:30px}}
@media(max-width:560px){.footer-cols{grid-template-columns:1fr}}

/* ---------- SMALL IMAGES (float right) ---------- */
.prose img.img-small{width:215px;height:auto;float:right;margin:6px 0 18px 24px;border-radius:8px}
.prose h2,.prose h3{clear:both}   /* keep headings below a floated image */
@media(max-width:560px){
  .prose img.img-small{float:none;display:block;width:60%;margin:1.3em auto}
}

/* ================= HERO META (author card + actions) ================= */
.hero-main{min-width:0}
.post-meta{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;padding-top:22px;border-top:1px solid var(--line);margin-top:6px}
.author-card{display:flex;align-items:center;gap:13px}
.author-pic{width:46px;height:46px;border-radius:50%;object-fit:cover;background:var(--panel);flex:none}
.author-text{display:flex;flex-direction:column;gap:3px;font-size:.85rem}
.author-name{font-weight:600;color:var(--text);cursor:pointer;width:fit-content;border-bottom:1px dotted var(--faint)}
.author-name.static{cursor:default;border:none}
.author-name:hover{color:var(--blue)}
.author-role{color:var(--soft);display:flex;align-items:center;flex-wrap:wrap}
.author-updated{color:var(--faint);font-size:.8rem}

.meta-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.meta-btn{background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:7px 15px;font:inherit;font-size:.82rem;font-weight:500;color:var(--text);cursor:pointer;transition:border-color .15s,background .15s}
.meta-btn:hover{border-color:var(--blue);color:var(--blue)}
.share{display:flex;align-items:center;gap:8px}
.share-x,.share-more{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:999px;background:var(--bg);color:var(--text);cursor:pointer;font:inherit;font-size:.82rem;font-weight:500;transition:border-color .15s,color .15s}
.share-x{width:34px;height:34px;font-size:.95rem}
.share-more{padding:7px 15px}
.share-x:hover,.share-more:hover{border-color:var(--blue);color:var(--blue)}

/* hero right-hand boxes */
.hero-aside{min-width:0}
.hero-aside:has(.hero-box-img){align-self:center}
.hero-box-img{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}
.hero-box-img img{max-width:100%;width:auto;height:auto;border-radius:10px;display:block}
.hero-box-cap{display:block;font-size:.8rem;color:var(--faint);margin-top:8px}
.hero-offer .offer-tag{font-size:.68rem;letter-spacing:.07em;text-transform:uppercase;color:var(--faint);display:block;margin-bottom:8px}
.hero-offer .offer-head{display:block;font-size:1.05rem;margin-bottom:6px}
.hero-offer .offer-text{font-size:.9rem;color:var(--soft);margin-bottom:14px;text-align:left}
.hero-offer .btn{display:block}
.hero-offer .offer-alt{display:block;text-align:center;margin-top:10px;font-size:.82rem;color:var(--soft);text-decoration:underline;text-underline-offset:3px}
.hero-offer .offer-alt:hover{color:var(--blue)}

/* portals (light tooltips + share menu) */
.ttip-portal,.share-portal{display:none;position:fixed;top:0;left:0;z-index:9999;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 32px rgba(30,37,48,.18),0 2px 6px rgba(30,37,48,.08)}
.ttip-portal{width:320px;max-width:min(90vw,340px);padding:18px 20px;font-size:.9rem;line-height:1.6;color:#333B47}
.ttip-portal.is-open,.share-portal.is-open{display:block}
.ttip-portal .ttip-card{display:flex;align-items:center;gap:12px;padding-bottom:13px;margin-bottom:13px;border-bottom:1px solid var(--line)}
.ttip-portal .ttip-card img{width:44px;height:44px;border-radius:50%;object-fit:cover}
.ttip-portal .ttip-card b{display:block;color:var(--text)}
.ttip-portal .ttip-card span{font-size:.82rem;color:var(--soft)}
.ttip-portal p{margin:0}
.share-portal{min-width:170px;padding:8px}
.share-portal a{display:block;padding:9px 12px;border-radius:8px;font-size:.9rem;font-weight:500;color:var(--text)}
.share-portal a:hover{background:var(--panel);color:var(--blue)}

@media(max-width:920px){
  .post-meta{flex-direction:column;align-items:flex-start;gap:16px}
}

/* ================= SIMPLE PAGES + ARCHIVES ================= */
.simple-page{padding-top:48px}
.page-title{font-family:var(--serif);font-weight:600;font-size:clamp(1.9rem,3.5vw,2.5rem);line-height:1.18;letter-spacing:-0.01em;margin-bottom:28px}
.arch-list{display:flex;flex-direction:column}
.arch-item{padding:20px 0;border-bottom:1px solid var(--line)}
.arch-item:first-child{padding-top:0}
.arch-link{font-family:var(--serif);font-weight:600;font-size:1.25rem;color:var(--text);line-height:1.3}
.arch-link:hover{color:var(--blue)}
.arch-desc{color:var(--soft);font-size:.92rem;margin:6px 0 8px;max-width:60ch}
.arch-date{font-size:.8rem;color:var(--faint)}

/* ---------- LITE YOUTUBE ---------- */
.yt-lite{position:relative;width:100%;aspect-ratio:16/9;background:#000;border-radius:10px;overflow:hidden;cursor:pointer;margin:1.7em 0}
.yt-lite .yt-thumb{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;margin:0;border-radius:0}
.yt-lite .yt-play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:68px;height:48px;border:none;border-radius:14px;background:rgba(0,0,0,.6);cursor:pointer;transition:background .2s}
.yt-lite:hover .yt-play{background:#c00}
.yt-lite .yt-play::before{content:"";position:absolute;top:50%;left:53%;transform:translate(-50%,-50%);border-style:solid;border-width:10px 0 10px 17px;border-color:transparent transparent transparent #fff}
.yt-lite iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* ---------- SIDEBAR AD (under TOC) ---------- */
.side .side-ad{text-align:center}
.side .side-ad .ad-label{font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);display:block;margin-bottom:8px}