:root{
  --ink:#10122b;--ink2:#1b1f4a;--violet:#6c4bff;--violet2:#8b6dff;--amber:#ffb703;--amber2:#ff9500;
  --teal:#00b8a9;--rose:#ff4d6d;--sky:#e8f0ff;--sand:#fff6e0;--mint:#e3fbf6;--blush:#ffe9ee;
  --text:#1c1e33;--muted:#5d6180;--line:#e2e5f3;--white:#fff;--radius:18px;
  --shadow:0 14px 40px rgba(31,28,90,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--text);line-height:1.65;background:#fff;font-size:17px}
img,svg{max-width:100%}
a{color:var(--violet)}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .6em;color:var(--ink)}
h1{font-size:clamp(2rem,4.6vw,3.4rem);letter-spacing:-.02em}
h2{font-size:clamp(1.6rem,3vw,2.3rem);letter-spacing:-.01em}
h3{font-size:1.25rem}
p{margin:0 0 1em}
ul,ol{padding-left:1.25em;margin:0 0 1em}
li{margin-bottom:.4em}
.wrap{width:min(1180px,92%);margin:0 auto}
.narrow{width:min(860px,92%);margin:0 auto}
section{padding:72px 0}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--violet);background:rgba(108,75,255,.1);padding:6px 12px;border-radius:99px;margin-bottom:14px}
.lead{font-size:1.15rem;color:var(--muted)}
.center{text-align:center}

/* header */
.topbar{position:sticky;top:0;z-index:50;background:rgba(16,18,43,.94);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:62px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800;font-size:1.05rem}
.brand .eye{width:32px;height:32px}
.nav{display:flex;gap:4px;align-items:center}
.nav a{color:#cfd3f5;text-decoration:none;font-size:.9rem;padding:8px 10px;border-radius:8px}
.nav a:hover{background:rgba(255,255,255,.08);color:#fff}
.burger{display:none;background:none;border:0;color:#fff;font-size:1.6rem;cursor:pointer}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:700;border:0;border-radius:12px;padding:14px 24px;cursor:pointer;text-decoration:none;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-2px)}
.btn-amber{background:linear-gradient(135deg,var(--amber),var(--amber2));color:#2b1b00;box-shadow:0 10px 26px rgba(255,160,0,.35)}
.btn-violet{background:linear-gradient(135deg,var(--violet),var(--violet2));color:#fff;box-shadow:0 10px 26px rgba(108,75,255,.35)}
.btn-ghost{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.35)}
.btn-dark{background:var(--ink);color:#fff}
.btn-sm{padding:9px 16px;font-size:.88rem}

/* hero */
.hero{background:radial-gradient(1000px 500px at 80% 0,rgba(108,75,255,.55),transparent 60%),radial-gradient(700px 400px at 0 100%,rgba(0,184,169,.3),transparent 60%),var(--ink);color:#fff;padding:70px 0 80px;position:relative;overflow:hidden}
.hero h1{color:#fff}
.hero .grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero .lead{color:#c8cdf2}
.hero .eyebrow{background:rgba(255,183,3,.15);color:var(--amber)}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}
.hero-badges span{font-size:.85rem;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);padding:7px 12px;border-radius:99px;color:#e5e7ff}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
.hero-card{background:#fff;color:var(--text);border-radius:24px;padding:28px;box-shadow:0 30px 60px rgba(0,0,0,.35)}
.hero-card h2{font-size:1.4rem}
.hero-card small{color:var(--muted);display:block;margin-top:10px;font-size:.8rem}
.eye-art{display:block;margin:0 auto 14px;width:84px;height:84px}

/* forms */
.form{display:grid;gap:10px}
.form input,.form textarea,.form select{font:inherit;padding:14px 16px;border-radius:12px;border:2px solid var(--line);width:100%;background:#fff}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--violet)}
.form-msg{font-size:.92rem;font-weight:600;min-height:1.2em}
.form-msg.ok{color:#0a8a5a}.form-msg.err{color:#c4223f}
.hp{position:absolute;left:-9999px}

/* trust strip */
.trust{background:var(--sand);padding:34px 0}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align:center}
.stats b{display:block;font-size:2rem;color:var(--ink2)}
.stats span{font-size:.92rem;color:var(--muted)}

/* layout with toc */
.with-toc{display:grid;grid-template-columns:260px 1fr;gap:44px;align-items:start}
.toc{position:sticky;top:84px;background:var(--sky);border-radius:var(--radius);padding:20px}
.toc h2{font-size:1rem;margin-bottom:10px}
.toc ol{list-style:none;padding:0;margin:0}
.toc a{display:block;text-decoration:none;color:var(--text);font-size:.9rem;padding:6px 10px;border-radius:8px;border-left:3px solid transparent}
.toc a.active,.toc a:hover{background:#fff;border-left-color:var(--violet);color:var(--violet)}
.article h2{margin-top:1.8em}
.article h2:first-child{margin-top:0}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cards.two{grid-template-columns:repeat(2,1fr)}
.cards.four{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.card .ico{font-size:1.8rem;margin-bottom:8px;display:block}
.card.tint-v{background:var(--sky)}.card.tint-t{background:var(--mint)}.card.tint-r{background:var(--blush)}.card.tint-a{background:var(--sand)}

/* section backgrounds */
.bg-sky{background:var(--sky)}
.bg-sand{background:var(--sand)}
.bg-mint{background:var(--mint)}
.bg-dark{background:var(--ink);color:#d9dcff}
.bg-dark h2,.bg-dark h3{color:#fff}
.bg-blush{background:var(--blush)}

/* tables */
.tbl-wrap{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow);margin:18px 0 28px;background:#fff}
table{border-collapse:collapse;width:100%;min-width:640px;font-size:.95rem}
caption{caption-side:top;text-align:left;font-weight:700;padding:14px 18px;background:#fff;color:var(--ink)}
th,td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--ink);color:#fff;font-weight:600}
tbody tr:nth-child(even){background:#f8f9ff}
td.yes{color:#0a8a5a;font-weight:700}td.no{color:#c4223f;font-weight:700}td.mid{color:#b36b00;font-weight:700}
.tbl-note{font-size:.85rem;color:var(--muted)}

/* tabs */
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.tab{font:inherit;font-weight:600;border:2px solid var(--line);background:#fff;padding:10px 18px;border-radius:99px;cursor:pointer}
.tab[aria-selected=true]{background:var(--violet);border-color:var(--violet);color:#fff}
.panel{display:none;background:#fff;border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.panel.on{display:block}

/* steps */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;list-style:none;padding:0}
.steps li{counter-increment:s;background:#fff;border-radius:var(--radius);padding:22px;position:relative;box-shadow:var(--shadow)}
.steps li::before{content:counter(s);display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--amber);color:#2b1b00;font-weight:800;margin-bottom:10px}

/* callouts */
.callout{border-left:5px solid var(--amber);background:var(--sand);padding:18px 22px;border-radius:0 14px 14px 0;margin:22px 0}
.callout.warn{border-color:var(--rose);background:var(--blush)}
.callout.ok{border-color:var(--teal);background:var(--mint)}
.callout strong{color:var(--ink)}

/* pros cons */
.proscons{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:20px 0}
.pros,.cons{padding:22px;border-radius:var(--radius)}
.pros{background:var(--mint)}.cons{background:var(--blush)}
.pros h3{color:#0a8a5a}.cons h3{color:#c4223f}
.pros ul,.cons ul{list-style:none;padding:0}
.pros li::before{content:"✔ ";color:#0a8a5a}.cons li::before{content:"✖ ";color:#c4223f}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--violet),#3a1fc9 55%,var(--teal));color:#fff;border-radius:28px;padding:44px;display:grid;grid-template-columns:1.2fr .8fr;gap:30px;align-items:center}
.cta-band h2,.cta-band h3{color:#fff}
.cta-band .form input{border-color:transparent}
.cta-mini{background:var(--ink);color:#fff;border-radius:var(--radius);padding:24px;display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;margin:28px 0}
.cta-mini p{margin:0;font-weight:600}

/* quiz */
.quiz{background:#fff;border-radius:24px;padding:30px;box-shadow:var(--shadow);max-width:760px;margin:0 auto}
.quiz-q{display:none}.quiz-q.on{display:block}
.quiz-opts{display:grid;gap:10px;margin:14px 0}
.quiz-opts button{font:inherit;text-align:left;padding:14px 18px;border-radius:12px;border:2px solid var(--line);background:#fff;cursor:pointer}
.quiz-opts button:hover{border-color:var(--violet);background:var(--sky)}
.progress{height:8px;background:var(--line);border-radius:9px;overflow:hidden;margin-bottom:18px}
.progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--teal),var(--violet));transition:width .3s}
.quiz-result{display:none}
.quiz-result.on{display:block}

/* timeline */
.timeline{border-left:3px solid var(--violet);padding-left:24px;margin:20px 0}
.timeline div{margin-bottom:22px;position:relative}
.timeline div::before{content:"";position:absolute;left:-33px;top:6px;width:14px;height:14px;border-radius:50%;background:var(--amber);border:3px solid #fff;box-shadow:0 0 0 2px var(--violet)}

/* reviews */
.rev{background:#fff;border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);border-top:5px solid var(--violet)}
.rev:nth-child(2){border-color:var(--teal)}.rev:nth-child(3){border-color:var(--amber)}
.rev:nth-child(5){border-color:var(--teal)}.rev:nth-child(6){border-color:var(--rose)}
.stars{color:var(--amber);letter-spacing:2px}
.rev footer{font-size:.85rem;color:var(--muted);margin-top:10px}

/* faq */
.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;padding:0 20px}
.faq summary{cursor:pointer;font-weight:700;padding:18px 0;list-style:none;display:flex;justify-content:space-between;gap:12px;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.5rem;color:var(--violet);line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details[open]{border-color:var(--violet);box-shadow:var(--shadow)}
.faq details p,.faq details ul{color:var(--muted)}

/* author */
.author{display:flex;gap:20px;align-items:flex-start;background:#fff;border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.avatar{flex:0 0 64px;width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--violet),var(--teal));display:grid;place-items:center;color:#fff;font-weight:800;font-size:1.3rem}
.sources li{font-size:.95rem}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tags span{background:#fff;border:1px solid var(--line);border-radius:99px;padding:6px 12px;font-size:.82rem;color:var(--muted)}
.bg-dark .tags span{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.15);color:#cfd3f5}

/* breadcrumbs */
.crumbs{font-size:.85rem;padding:14px 0;color:#9aa0d6}
.crumbs a{color:#cfd3f5;text-decoration:none}
.crumbs span{margin:0 6px}

/* footer */
footer.site{background:#0a0b1f;color:#9aa0d6;padding:50px 0 100px;font-size:.9rem}
footer.site h3{color:#fff;font-size:1rem}
footer.site a{color:#cfd3f5}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.disclaimer{border-top:1px solid rgba(255,255,255,.1);margin-top:28px;padding-top:20px;font-size:.82rem}

/* sticky bar */
.sticky{position:fixed;left:0;right:0;bottom:0;z-index:60;background:var(--ink);color:#fff;padding:10px 0;transform:translateY(110%);transition:transform .3s;box-shadow:0 -8px 30px rgba(0,0,0,.3)}
.sticky.show{transform:none}
.sticky .wrap{display:flex;align-items:center;justify-content:space-between;gap:14px}
.sticky p{margin:0;font-weight:600;font-size:.95rem}
.sticky .x{background:none;border:0;color:#9aa0d6;font-size:1.4rem;cursor:pointer}

@media(max-width:980px){
  .hero .grid,.with-toc,.cta-band,.proscons,.fgrid{grid-template-columns:1fr}
  .toc{position:static}
  .cards,.cards.four{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  body{font-size:16px}
  section{padding:50px 0}
  .nav{display:none;position:absolute;top:62px;left:0;right:0;background:var(--ink);flex-direction:column;padding:12px;align-items:stretch}
  .nav.open{display:flex}
  .burger{display:block}
  .cards,.cards.two,.cards.four,.steps{grid-template-columns:1fr}
  .cta-band{padding:28px 22px}
  .sticky p{font-size:.82rem}
  .author{flex-direction:column}
}