/* Vanssay guides — shared design system. Editorial article + sticky TOC rail. */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#f6f6f4;--surface:#fffefb;--border:#dedcd6;--line:#16151b;--text:#16151b;--text-2:#56545f;--muted:#8f8d86;--green:#16a34a;--green-soft:#e6f3ec;--ink:#11130f}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{font-family:'Inter',-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(680px 460px at 10% 6%,rgba(22,163,74,.07),transparent 60%),radial-gradient(680px 460px at 92% 3%,rgba(43,80,255,.05),transparent 62%),radial-gradient(760px 520px at 96% 88%,rgba(22,163,74,.05),transparent 60%)}
a{color:var(--green);text-decoration:none}a:hover{text-decoration:underline}

/* top nav */
nav.top{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px;margin:0 auto;max-width:1080px;padding:0 28px}
.logo{display:flex;align-items:center;gap:9px;font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:18px;letter-spacing:-.03em;color:var(--text)}
.logo:hover{text-decoration:none}
.nav-links{display:flex;gap:24px;font-family:'Space Mono',monospace;font-size:11.5px;letter-spacing:.1em;text-transform:uppercase}
.nav-links a{color:var(--text-2)}.nav-links a:hover{color:var(--green);text-decoration:none}
@media(max-width:820px){.nav-links{display:none}}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:6px;font-weight:600;font-size:14px;border:1px solid transparent;cursor:pointer;transition:.18s;text-decoration:none}
.btn-green{background:var(--green);color:#fff}.btn-green:hover{filter:brightness(1.08);text-decoration:none}
.btn-line{background:transparent;border-color:var(--border);color:var(--text)}.btn-line:hover{border-color:var(--green);color:var(--green);text-decoration:none}

/* layout: article + sticky rail */
.layout{max-width:1060px;margin:0 auto;padding:0 28px;display:grid;grid-template-columns:minmax(0,1fr) 216px;gap:52px;align-items:start}
article{max-width:none;margin:0;min-width:0;padding:52px 0 40px}
.rail{position:sticky;top:86px;padding-top:64px}
.rail .toc-t{font-family:'Space Mono',monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.rail nav a{display:block;color:var(--text-2);font-size:13px;line-height:1.35;padding:6px 0 6px 13px;border-left:2px solid var(--border);text-decoration:none}
.rail nav a:hover{color:var(--green);border-color:var(--green);text-decoration:none}
.rail nav a.active{color:var(--green);border-color:var(--green);font-weight:600}
.rail-sec{margin-top:28px}
.rail-try{display:block;margin-top:22px;padding-top:16px;border-top:1px solid var(--border);font-size:12.5px;color:var(--text-2);text-decoration:none}
.rail-try b{color:var(--text);font-weight:600}
.rail-try:hover{color:var(--green);text-decoration:none}
@media(max-width:900px){.layout{grid-template-columns:1fr;max-width:720px}.rail{display:none}}

/* typography */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:'Space Mono',monospace;font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--green);margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--green)}
h1{font-family:'Bricolage Grotesque',sans-serif;font-size:clamp(30px,5vw,44px);font-weight:800;letter-spacing:-.03em;line-height:1.08;margin-bottom:16px}
h2{font-family:'Bricolage Grotesque',sans-serif;font-size:clamp(21px,3vw,27px);font-weight:800;letter-spacing:-.02em;line-height:1.15;margin:44px 0 12px}
h3{font-family:'Bricolage Grotesque',sans-serif;font-size:17px;font-weight:800;margin:26px 0 8px}
article h2{scroll-margin-top:0}
.lead{font-size:17.5px;color:var(--text-2);margin-bottom:10px}
article p{margin:12px 0;color:var(--text-2)}
article p strong,article li strong{color:var(--text)}
article ul,article ol{margin:12px 0 12px 22px;color:var(--text-2)}
article li{margin:7px 0}
code{font-family:'Space Mono',monospace;font-size:.86em;background:#ececea;padding:1px 5px;border-radius:4px}

/* comparison table */
table{width:100%;border-collapse:collapse;margin:18px 0;font-size:13.5px;background:var(--surface)}
th,td{border:1px solid var(--border);padding:9px 11px;text-align:left;vertical-align:top}
th{font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:13px}
td{color:var(--text-2)}
.yes{color:var(--green);font-weight:700}.no{color:#b0663a;font-weight:700}
.th-b{display:flex;align-items:center;gap:7px}.th-b svg{flex-shrink:0}

/* steps */
.steps{counter-reset:step;list-style:none;margin-left:0}
.steps li{counter-increment:step;position:relative;padding-left:42px;margin:14px 0}
.steps li::before{content:counter(step);position:absolute;left:0;top:1px;width:28px;height:28px;border-radius:4px;background:var(--green-soft);color:var(--green);font-family:'Space Mono',monospace;font-weight:700;font-size:13px;display:grid;place-items:center}

/* byline + meta + compat badges */
.byline{display:flex;gap:13px;align-items:flex-start;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:14px 16px;margin:22px 0 6px;font-size:13.5px;color:var(--text-2)}
.byline .av{flex-shrink:0;width:34px;height:34px;border-radius:50%;background:var(--ink);display:grid;place-items:center}
.byline b{color:var(--text)}
.meta{font-family:'Space Mono',monospace;font-size:11.5px;color:var(--muted);margin:14px 0 4px}
.compat{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 2px}
.compat span{display:inline-flex;align-items:center;gap:7px;font-family:'Space Mono',monospace;font-size:10.5px;letter-spacing:.04em;color:var(--text-2);background:var(--surface);border:1px solid var(--border);border-radius:99px;padding:5px 12px}
.i-framer{width:12px;height:auto;vertical-align:-1px}
.i-cf{width:22px;height:auto;vertical-align:-4px}
h2 .i-cf,.h2ic .i-cf{width:27px;vertical-align:0;flex-shrink:0}
.h2ic{display:flex;align-items:center;gap:9px}

/* note + figure/screenshot */
.note{background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--green);border-radius:4px;padding:14px 18px;margin:20px 0;font-size:14px;color:var(--text-2)}
.shot{margin:28px auto;max-width:660px}
.shot>img{width:100%;height:auto;display:block;border-radius:11px;border:1px solid var(--border);box-shadow:0 14px 40px rgba(22,21,27,.18)}
figcaption{font-family:'Space Mono',monospace;font-size:11px;color:var(--muted);margin-top:11px;text-align:center;line-height:1.5}

/* block-screen browser mock */
.bs{background:#fff;border:1px solid var(--border);border-radius:11px;overflow:hidden;box-shadow:0 14px 40px rgba(22,21,27,.16)}
.bs .bar{display:flex;align-items:center;gap:6px;padding:9px 12px;background:#f2f1ee;border-bottom:1px solid var(--border)}
.bs .bar i{width:9px;height:9px;border-radius:50%;background:#d3d1cc}
.bs .bar .u{flex:1;text-align:center;font-family:'Space Mono',monospace;font-size:10.5px;color:#a7a5a0}
.bs .screen{background:#0f1211;color:#e7f0ec;text-align:center;padding:44px 26px;min-height:220px;display:grid;place-content:center;justify-items:center}
.bs .sh{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;color:#8fd6ae;margin-bottom:14px}
.bs h3{font-family:'Bricolage Grotesque',sans-serif;font-size:21px;font-weight:800;margin-bottom:8px;color:#fff}
.bs p{font-size:13px;color:#93a89f;max-width:320px;margin:0 auto 18px}
.bs .home{background:#e7f0ec;color:#0f1211;font-weight:600;font-size:12.5px;border-radius:7px;padding:8px 18px}

/* end CTA (single, modest) */
.endcta{border:1px solid var(--border);border-radius:8px;padding:20px 22px;margin:40px 0 8px;display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap;background:var(--surface)}
.endcta .t{font-size:14px;color:var(--text-2);max-width:400px}
.endcta .t b{color:var(--text);font-family:'Bricolage Grotesque',sans-serif}

/* faq + related + refs */
details{background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:15px 19px;margin:10px 0}
details:hover{border-color:var(--green)}
summary{font-family:'Bricolage Grotesque',sans-serif;font-weight:700;font-size:15px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;color:var(--text)}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:20px;font-weight:300;color:var(--green)}
details[open] summary::after{content:"–"}
details p{margin-top:8px;font-size:14px}
.related{border-top:1px solid var(--border);margin-top:44px;padding-top:22px}
.related h2{margin-top:0;font-size:16px}.related ul{margin-left:22px}
.refs{font-size:12.5px;color:var(--muted);margin-top:26px;border-top:1px solid var(--border);padding-top:16px}
.refs a{color:var(--text-2)}

/* footer */
.site-foot{background:#16151b;color:rgba(255,255,255,.6);padding:36px 0;margin-top:56px}
.site-foot .wrap{max-width:1080px;margin:0 auto;padding:0 28px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-family:'Space Mono',monospace;font-size:12px}
.site-foot a{color:rgba(255,255,255,.7)}.site-foot a:hover{color:#fff}