/* ytbeactivate.tv — one stylesheet, no framework.
   Layout: a calm reading column with a sticky "On this page" rail on wide screens;
   the hero pairs a drawn TV sign-in screen with the phone step. Cobalt matches the app. */
@font-face{font-family:"Figtree";src:url(/assets/fonts/figtree-latin.woff2) format("woff2");font-weight:400 800;font-display:swap}
:root{
  --bg:#f6f8fc; --surface:#fff; --sunk:#eef2f9; --ink:#0d1626; --muted:#566279; --line:#dfe5ef;
  --accent:#2557d6; --accent-ink:#1c3fa8; --accent-soft:#e7eefd; --on-accent:#fff;
  --led:#e8890c; --ok:#0b7f60; --ok-soft:#e3f5ee; --warn:#b5400b; --warn-soft:#fdeee6;
  --bezel:#121a2b; --screen:#0b1222; --screen-ink:#e9eefb; --screen-muted:#8d9ab6;
  --shadow:0 1px 2px rgba(13,22,38,.06),0 8px 24px -12px rgba(13,22,38,.18);
  --font:"Figtree",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --r:14px; --r-sm:10px; --wrap:1120px; --read:700px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0a0f1c; --surface:#111a2c; --sunk:#0d1525; --ink:#e7ecf6; --muted:#9ba7bf; --line:#22304a;
  --accent:#7097ff; --accent-ink:#a8bfff; --accent-soft:#16244a; --on-accent:#08112a;
  --led:#ffad3b; --ok:#3fcf9e; --ok-soft:#0f2a24; --warn:#ff8a4c; --warn-soft:#2e1a10;
  --bezel:#05080f; --screen:#0d1630; --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -14px rgba(0,0,0,.7);
  color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0a0f1c; --surface:#111a2c; --sunk:#0d1525; --ink:#e7ecf6; --muted:#9ba7bf; --line:#22304a;
  --accent:#7097ff; --accent-ink:#a8bfff; --accent-soft:#16244a; --on-accent:#08112a;
  --led:#ffad3b; --ok:#3fcf9e; --ok-soft:#0f2a24; --warn:#ff8a4c; --warn-soft:#2e1a10;
  --bezel:#05080f; --screen:#0d1630; --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -14px rgba(0,0,0,.7);
  color-scheme:dark}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.65 var(--font);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{max-width:100%;height:auto}
a{color:var(--accent-ink);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:6px}
h1,h2,h3{line-height:1.2;letter-spacing:-.02em;text-wrap:balance;margin:0}
h1{font-size:clamp(2rem,1.4rem + 2.6vw,3.1rem);font-weight:800}
h2{font-size:clamp(1.4rem,1.2rem + .9vw,1.85rem);font-weight:750}
h3{font-size:1.15rem;font-weight:700}
p{margin:0}
code,kbd,.mono{font-family:var(--mono);font-size:.92em}
kbd{background:var(--sunk);border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:.05em .4em;white-space:nowrap}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.skip{position:absolute;left:-999px;top:8px;background:var(--surface);padding:8px 12px;border-radius:8px;z-index:50}
.skip:focus{left:12px}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* Header */
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:31;background:var(--bg)}
.site-head{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.06rem;letter-spacing:-.01em;margin-right:auto}
.brand svg{flex:none}
.brand small{color:var(--muted);font-weight:600}
.nav{display:flex;gap:4px;align-items:center}
.nav a{color:var(--ink);text-decoration:none;font-weight:600;font-size:.95rem;padding:8px 12px;border-radius:999px}
.nav a:hover,.nav a[aria-current="page"]{background:var(--accent-soft);color:var(--accent-ink)}
.icon-btn{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer}
.icon-btn:hover{border-color:var(--accent)}
.menu-btn{display:none}
@media (max-width:820px){
  .menu-btn{display:inline-grid}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:2px;background:var(--surface);border-bottom:1px solid var(--line);padding:8px max(16px,env(safe-area-inset-right,0px)) 14px max(16px,env(safe-area-inset-left,0px));box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .nav a{padding:12px 14px;border-radius:10px}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 22px;border-radius:999px;font:700 1.02rem/1 var(--font);text-decoration:none;cursor:pointer;border:1px solid transparent;transition:transform .15s ease,background .15s ease}
.btn-primary{background:var(--accent);color:var(--on-accent);box-shadow:0 8px 20px -10px var(--accent)}
.btn-primary:hover{background:var(--accent-ink);color:var(--on-accent)}
:root[data-theme="dark"] .btn-primary:hover{background:var(--accent-ink)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-ink)}
.btn:active{transform:translateY(1px)}
.btn-note{font-size:.84rem;color:var(--muted)}

/* Hero */
.hero{padding-block:clamp(28px,5vw,64px) clamp(28px,5vw,56px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:clamp(24px,4vw,56px);align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.led{width:8px;height:8px;border-radius:50%;background:var(--led);box-shadow:0 0 0 3px color-mix(in srgb,var(--led) 25%,transparent)}
.hero h1{margin-top:14px}
.hero .lede{margin-top:16px;font-size:1.15rem;color:var(--muted);max-width:56ch}
.answer{margin-top:22px;display:grid;gap:10px;counter-reset:a;padding:0;list-style:none}
.answer li{display:grid;grid-template-columns:32px 1fr;gap:12px;align-items:start}
.answer li::before{counter-increment:a;content:counter(a);display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--accent-soft);color:var(--accent-ink);font-weight:800;font-size:.95rem}
.hero-cta{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero-cta .btn-note{flex-basis:100%}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr}}

/* Drawn TV + phone (no third-party UI, a generic sign-in screen) */
.stage{position:relative;padding-bottom:56px;margin-right:10px}
.tv{background:var(--bezel);border-radius:18px;padding:10px;box-shadow:var(--shadow)}
.tv-screen{background:radial-gradient(120% 90% at 20% 0%,color-mix(in srgb,var(--accent) 22%,var(--screen)) 0%,var(--screen) 60%);border-radius:10px;aspect-ratio:16/9;max-width:100%;color:var(--screen-ink);display:grid;grid-template-columns:1fr auto;align-items:start;gap:6%;padding:7% 8%}
.tv-screen .label{font-size:clamp(.62rem,.5rem + .4vw,.82rem);color:var(--screen-muted);letter-spacing:.06em;text-transform:uppercase;font-weight:700}
.tv-screen .big{font-size:clamp(.8rem,.6rem + .8vw,1.2rem);font-weight:700;margin-top:.35em;line-height:1.3}
.tv-code{margin-top:.8em;display:inline-block;font-family:var(--mono);font-weight:700;letter-spacing:.14em;font-size:clamp(.9rem,.6rem + 1.2vw,1.55rem);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:8px;padding:.3em .55em}
.tv-qr{background:#fff;border-radius:8px;padding:6px;width:clamp(72px,11vw,128px)}
.tv-qr svg{display:block;width:100%;height:auto}
.tv-foot{display:flex;justify-content:center;margin-top:8px}
.tv-foot span{width:26%;height:7px;border-radius:0 0 8px 8px;background:var(--bezel)}
.tv-led{position:absolute;right:22px;bottom:38px;width:6px;height:6px;border-radius:50%;background:var(--led)}
.phone{position:absolute;right:-10px;bottom:0;width:27%;min-width:112px;background:var(--bezel);border-radius:20px;padding:6px;box-shadow:var(--shadow)}
.phone-screen{background:var(--surface);border-radius:15px;padding:12px 10px 14px;display:grid;gap:7px;font-size:.66rem}
.phone-url{background:var(--sunk);border-radius:999px;padding:5px 8px;font-family:var(--mono);color:var(--ink);font-size:.62rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.phone-field{border:1.5px solid var(--accent);border-radius:7px;padding:6px;font-family:var(--mono);letter-spacing:.12em;text-align:center;color:var(--ink);font-weight:700}
.phone-btn{background:var(--accent);color:var(--on-accent);border-radius:999px;text-align:center;padding:5px;font-weight:700}
.example-tag{position:absolute;left:12px;top:-12px;background:var(--surface);border:1px solid var(--line);border-radius:999px;font-size:.72rem;font-weight:700;color:var(--muted);padding:3px 10px;letter-spacing:.04em}

/* Sections */
.band{padding-block:clamp(36px,5vw,64px)}
.band-alt{background:var(--surface);border-block:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;gap:8px 24px;align-items:end;justify-content:space-between;margin-bottom:24px}
.section-head p{color:var(--muted);max-width:60ch}

/* Device and service grids */
.tile-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,230px),1fr));gap:12px}
.tile{display:flex;align-items:center;gap:12px;padding:14px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);text-decoration:none;color:var(--ink);font-weight:700;min-height:64px;transition:border-color .15s,transform .15s}
.tile:hover{border-color:var(--accent);transform:translateY(-1px)}
.tile .glyph{flex:none;display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:var(--accent-soft);color:var(--accent-ink)}
.tile small{display:block;font-weight:500;color:var(--muted);font-size:.8rem;line-height:1.3}
.tile .mono{font-size:.78rem}
.svc .glyph{color:#fff;font-weight:800}
.filter{display:flex;gap:10px;align-items:center;margin-bottom:16px}
.filter input{flex:1;min-width:0;height:48px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);padding:0 18px;font:inherit}
.filter input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}

/* Article */
.page-head{padding-block:clamp(24px,4vw,44px) 8px}
.crumbs{display:flex;flex-wrap:wrap;gap:6px;font-size:.88rem;color:var(--muted);list-style:none;padding:0;margin:0 0 14px}
.crumbs li+li::before{content:"/";margin-right:6px;opacity:.6}
.crumbs a{color:var(--muted)}
.page-head .lede{margin-top:14px;font-size:1.13rem;color:var(--muted);max-width:62ch}
.meta{margin-top:14px;display:flex;flex-wrap:wrap;gap:6px 16px;font-size:.86rem;color:var(--muted)}
.layout{display:grid;grid-template-columns:minmax(0,var(--read)) 240px;gap:56px;justify-content:space-between;padding-block:20px 56px}
@media (max-width:1000px){.layout{grid-template-columns:minmax(0,1fr)}.toc{display:none}}
.prose{min-width:0;display:flex;flex-direction:column;gap:18px}
.prose h2{margin-top:26px;padding-top:6px}
.prose h3{margin-top:8px}
.prose ul,.prose ol{margin:0;padding-left:1.3em;display:grid;gap:8px}
.prose li::marker{color:var(--muted)}
.steps{list-style:none;padding:0!important;counter-reset:s;gap:14px!important}
.steps>li{position:relative;padding:16px 16px 16px 64px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
.steps>li::before{counter-increment:s;content:counter(s);position:absolute;left:16px;top:15px;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--accent);color:var(--on-accent);font-weight:800;font-size:.95rem}
.steps>li>strong:first-child{margin-right:.25em}
.answer-box{border:1px solid color-mix(in srgb,var(--accent) 35%,var(--line));background:var(--accent-soft);border-radius:var(--r);padding:18px 20px}
.answer-box .kicker{font-size:.76rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-ink);margin-bottom:6px}
.note{border-radius:var(--r-sm);padding:14px 16px 14px 46px;position:relative;background:var(--sunk);border:1px solid var(--line)}
.note::before{position:absolute;left:14px;top:13px;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-weight:800;font-size:.8rem}
.note-tip::before{content:"i";background:var(--accent-soft);color:var(--accent-ink)}
.note-safe{background:var(--ok-soft);border-color:color-mix(in srgb,var(--ok) 30%,var(--line))}
.note-safe::before{content:"✓";background:var(--ok);color:var(--surface)}
.note-warn{background:var(--warn-soft);border-color:color-mix(in srgb,var(--warn) 30%,var(--line))}
.note-warn::before{content:"!";background:var(--warn);color:var(--surface)}
.cta-card{display:flex;flex-wrap:wrap;gap:14px 20px;align-items:center;justify-content:space-between;padding:18px 20px;border-radius:var(--r);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}
.cta-card p{color:var(--muted);font-size:.95rem}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r)}
table{border-collapse:collapse;width:100%;font-size:.95rem;background:var(--surface)}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--sunk);font-weight:700}
tr:last-child td{border-bottom:0}
.faq{display:grid;gap:10px}
.faq details{border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface)}
.faq summary{cursor:pointer;list-style:none;padding:14px 44px 14px 16px;font-weight:700;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:16px;top:11px;font-size:1.3rem;color:var(--muted);font-weight:500}
.faq details[open] summary::after{content:"−"}
.faq details>div{padding:0 16px 16px;color:var(--ink)}
.toc{position:sticky;top:96px;align-self:start;font-size:.9rem}
.toc p{font-weight:800;font-size:.76rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.toc ol{list-style:none;padding:0;margin:0;display:grid;gap:2px;border-left:1px solid var(--line)}
.toc a{display:block;padding:5px 12px;color:var(--muted);text-decoration:none;margin-left:-1px;border-left:2px solid transparent}
.toc a:hover{color:var(--ink);border-left-color:var(--accent)}
.toc .toc-cta{margin-top:18px;display:grid;gap:8px;padding:14px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface)}
.related{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.related a{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface);text-decoration:none;color:var(--ink);font-weight:700}
.related a small{display:block;color:var(--muted);font-weight:500;margin-top:2px}
.related a:hover{border-color:var(--accent)}

/* QR panel */
.qr-panel{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:center;padding:18px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
.qr-panel .qr{width:132px;background:#fff;border-radius:10px;padding:8px}
.qr-panel .qr svg{display:block;width:100%;height:auto}
@media (max-width:520px){.qr-panel{grid-template-columns:1fr}.qr-panel .qr{width:150px}}

/* Scanner */
.scanner{display:grid;gap:14px;padding:18px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);box-shadow:var(--shadow)}
.scan-view{position:relative;background:var(--screen);border-radius:12px;aspect-ratio:4/3;max-width:100%;overflow:hidden;display:grid;place-items:center;color:var(--screen-muted);text-align:center;padding:16px}
.scan-view video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.scan-frame{position:absolute;inset:18%;border:3px solid rgba(255,255,255,.85);border-radius:16px;box-shadow:0 0 0 999px rgba(0,0,0,.35);pointer-events:none}
.scan-actions{display:flex;flex-wrap:wrap;gap:10px}
.scan-result{border-radius:var(--r-sm);padding:14px 16px;display:grid;gap:10px}
.scan-result.ok{background:var(--ok-soft);border:1px solid color-mix(in srgb,var(--ok) 35%,var(--line))}
.scan-result.bad{background:var(--warn-soft);border:1px solid color-mix(in srgb,var(--warn) 35%,var(--line))}
.scan-result .url{font-family:var(--mono);font-size:.85rem;word-break:break-all}
.privacy-line{font-size:.85rem;color:var(--muted)}

/* Footer */
.site-foot{border-top:1px solid var(--line);background:var(--surface);padding-block:40px 28px;font-size:.93rem;color:var(--muted)}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:28px}
.foot-grid h3{font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink);margin-bottom:10px}
.foot-grid ul{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.foot-grid a{color:var(--muted);text-decoration:none}
.foot-grid a:hover{color:var(--ink)}
.disclaimer{margin-top:28px;padding-top:18px;border-top:1px solid var(--line);font-size:.85rem}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}.foot-grid>div:first-child{grid-column:1/-1}}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Narrow screens: grid children may shrink, and the drawn phone steps aside */
.wrap>*,.hero-grid>*{min-width:0}
@media (max-width:900px){.hero-grid{grid-template-columns:minmax(0,1fr)}}
@media (max-width:600px){
  .phone{display:none}
  .stage{margin-right:0;padding-bottom:24px}
  .tv-screen{grid-template-columns:1fr;gap:10px}
  .tv-qr{display:none}
  .hero-cta .btn{flex:1 1 100%}
  th,td{padding:10px}
}
.toc .toc-cta a.btn{color:var(--on-accent);border-left:0;margin-left:0;padding:0 18px;min-height:46px}
.toc .toc-cta a.btn:hover{color:var(--on-accent)}
[hidden]{display:none!important}
@media (max-width:600px){.tv-screen{align-content:center}}