:root{--bg:#050a1e;--panel:#0a1740;--line:rgba(80,160,255,.2);--cyan:#3fd0ff;--blue:#1e90ff;--text:#e8f0ff;--muted:#9fb3d9;--soft:#c9d8f5}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:radial-gradient(ellipse at 50% -10%,#0b1d52 0%,var(--bg) 55%);background-color:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
picture{display:block;width:100%}
.wrap{width:min(1120px,100% - 32px);margin-inline:auto}
.narrow{width:min(780px,100% - 32px);margin-inline:auto}

/* header */
.top{position:sticky;top:0;z-index:20;background:rgba(5,10,30,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.top .brand img{height:40px;width:auto}
.top nav{display:flex;align-items:center;gap:18px;font-size:.9rem;font-weight:600}
.top nav a{color:var(--soft)}
.top nav a:hover{color:#fff;text-decoration:none}
.btn-yt{white-space:nowrap;display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;background:linear-gradient(180deg,#ff3b30,#c4150d);color:#fff!important;font-weight:700;font-size:.85rem;box-shadow:0 6px 18px -6px rgba(255,0,0,.6)}
.btn-yt:hover{text-decoration:none;filter:brightness(1.1)}

/* article */
.crumbs{font-size:.8rem;color:var(--muted);margin:28px 0 14px}
.crumbs a{color:var(--muted)}.crumbs span{margin:0 6px;opacity:.5}
.pill{display:inline-block;font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;font-weight:700;color:var(--cyan);padding:5px 12px;border-radius:999px;border:1px solid rgba(63,208,255,.4);background:rgba(63,208,255,.08)}
h1.title{font-size:clamp(1.8rem,4.2vw,2.7rem);line-height:1.2;margin:14px 0 12px;letter-spacing:-.01em}
.meta{font-size:.85rem;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px 14px}
.hero-img{margin:24px 0;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:0 20px 60px -20px rgba(30,144,255,.45)}
.hero-img img{width:100%;height:auto;aspect-ratio:1200/630;object-fit:cover}
.answer{border-radius:16px;padding:18px 20px;margin:0 0 20px;background:linear-gradient(135deg,rgba(30,144,255,.16),rgba(63,208,255,.06));border:1px solid rgba(63,208,255,.35)}
.answer b{display:block;font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan);margin-bottom:6px}
.answer p{color:#fff;font-size:1.02rem}
.takeaways{border-radius:16px;padding:18px 20px;margin:0 0 20px;background:rgba(255,255,255,.035);border:1px solid var(--line)}
.takeaways h2{font-size:1rem;margin-bottom:8px}
.takeaways ul{padding-left:20px;color:var(--soft)}
.toc{border-radius:14px;padding:14px 18px;margin:0 0 26px;background:rgba(255,255,255,.03);border:1px solid var(--line);font-size:.92rem}
.toc summary{cursor:pointer;font-weight:700;color:#fff}
.toc ul{list-style:none;margin-top:8px;padding-left:4px}
.toc li{margin:4px 0}.toc a{color:var(--soft)}
.prose{font-size:1.06rem;color:#dbe5f7}
.prose>*+*{margin-top:1.05em}
.prose h2{font-size:1.55rem;line-height:1.3;color:#fff;margin-top:1.8em;scroll-margin-top:80px}
.prose h3{font-size:1.2rem;color:#fff;margin-top:1.4em;scroll-margin-top:80px}
.prose ul,.prose ol{padding-left:1.4em}
.prose li+li{margin-top:.35em}
.prose strong{color:#fff}
.prose blockquote{border-left:3px solid var(--cyan);padding:6px 16px;color:var(--soft);background:rgba(63,208,255,.05);border-radius:0 10px 10px 0}
.prose code{background:rgba(255,255,255,.08);padding:1px 6px;border-radius:6px;font-size:.92em}
.table-wrap{overflow-x:auto;border-radius:12px;border:1px solid var(--line)}
.prose table{width:100%;border-collapse:collapse;font-size:.94rem}
.prose th,.prose td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.prose th{background:rgba(30,144,255,.15);color:#fff}
.prose tr:last-child td{border-bottom:0}
.faq{margin-top:40px}
.faq h2{font-size:1.55rem;margin-bottom:14px}
.faq details{border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin-bottom:10px;background:rgba(255,255,255,.03)}
.faq summary{cursor:pointer;font-weight:700;color:#fff}
.faq details p{margin-top:8px;color:var(--soft)}
.sources{margin-top:32px;font-size:.88rem;color:var(--muted)}
.sources h2{font-size:1rem;color:var(--soft);margin-bottom:6px}
.sources ol{padding-left:20px}.sources a{color:var(--muted);word-break:break-word}
.share{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:32px 0;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:.88rem;color:var(--muted)}
.share a,.share button{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.04);color:#fff;font:inherit;font-weight:600;cursor:pointer}
.share a:hover,.share button:hover{border-color:var(--cyan);text-decoration:none}
.cta{margin:30px 0;border-radius:20px;padding:22px;display:flex;flex-wrap:wrap;align-items:center;gap:16px;justify-content:space-between;
  background:radial-gradient(400px 140px at 0% 0%,rgba(139,92,246,.25),transparent 70%),linear-gradient(120deg,#0c1a4a,#081233);border:1px solid rgba(63,208,255,.35)}
.cta b{font-size:1.1rem;color:#fff}.cta p{color:var(--muted);font-size:.9rem}
.cta .acts{display:flex;gap:10px;flex-wrap:wrap}
.btn-wa{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;background:linear-gradient(180deg,#25D366,#128C7E);color:#fff!important;font-weight:700;font-size:.85rem}
.btn-wa:hover{text-decoration:none;filter:brightness(1.1)}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cards>*{min-width:0}
.card{display:flex;flex-direction:column;border-radius:16px;overflow:hidden;border:1px solid var(--line);background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.015));transition:transform .25s,box-shadow .25s,border-color .25s;color:inherit}
.card:hover{transform:translateY(-4px);border-color:rgba(63,208,255,.5);box-shadow:0 16px 40px -14px rgba(30,144,255,.5);text-decoration:none}
.card img{aspect-ratio:1200/630;object-fit:cover;width:100%;height:auto}
.card .cb{padding:14px 16px 16px;display:flex;flex-direction:column;gap:6px;flex:1}
.card .cat{font-size:.66rem;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);font-weight:700}
.card h3{font-size:1.02rem;line-height:1.35;color:#fff}
.card p{font-size:.86rem;color:var(--muted);line-height:1.5;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card time{font-size:.75rem;color:#6f86b5;margin-top:auto}
.related{margin:40px 0}
.related h2{font-size:1.3rem;margin-bottom:16px}

/* list page */
.list-hero{text-align:center;padding:44px 0 26px}
.list-hero h1{font-size:clamp(1.8rem,4vw,2.6rem)}
.list-hero p{color:var(--muted);max-width:640px;margin:8px auto 0}
.tools{display:flex;flex-direction:column;gap:14px;align-items:center;margin-bottom:26px}
.search{width:min(520px,100%);padding:12px 18px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.05);color:#fff;font:inherit;outline:none}
.search:focus{border-color:var(--cyan)}
.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.chip{padding:6px 14px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--soft);font:inherit;font-size:.8rem;font-weight:600;cursor:pointer}
.chip.on,.chip:hover{border-color:var(--cyan);color:#fff;background:rgba(63,208,255,.12)}
.empty{text-align:center;color:var(--muted);padding:40px 0;display:none}

footer.foot{border-top:1px solid var(--line);margin-top:50px;padding:26px 0 34px;text-align:center;font-size:.82rem;color:#6f86b5}
footer.foot nav{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-bottom:10px}
footer.foot a{color:var(--muted)}

@media (max-width:900px){.cards{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){
  .cards{grid-template-columns:1fr}
  .top nav .hide-m{display:none}
  .top nav{gap:12px}.top .btn-yt{padding:7px 12px;font-size:.8rem}
  .top .brand img{height:34px}
  .prose{font-size:1rem}
  .prose h2{font-size:1.3rem}
}

/* ===== Reading experience ===== */
.progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:30;background:linear-gradient(90deg,#3fd0ff,#8b5cf6,#ff4ecd);box-shadow:0 0 12px rgba(63,208,255,.8)}
.totop{position:fixed;right:18px;bottom:18px;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;font-size:1.2rem;color:#fff!important;background:linear-gradient(135deg,#1e90ff,#8b5cf6);box-shadow:0 10px 30px -8px rgba(30,144,255,.8);opacity:0;pointer-events:none;transition:.3s;z-index:25}
.totop.on{opacity:1;pointer-events:auto}.totop:hover{text-decoration:none;transform:translateY(-3px)}

/* numbered, colour-cycling section headings */
.prose{counter-reset:sec}
.prose h2{counter-increment:sec;display:flex;align-items:center;gap:14px;padding-top:.3em}
.prose h2::before{content:counter(sec,decimal-leading-zero);flex:none;width:44px;height:44px;border-radius:13px;display:grid;place-items:center;font-size:.95rem;font-weight:800;color:#fff;background:var(--hc,linear-gradient(135deg,#1e90ff,#3fd0ff));box-shadow:0 8px 20px -6px var(--hs,rgba(30,144,255,.7))}
.prose h2:nth-of-type(5n+2){--hc:linear-gradient(135deg,#8b5cf6,#c084fc);--hs:rgba(139,92,246,.7)}
.prose h2:nth-of-type(5n+3){--hc:linear-gradient(135deg,#10b981,#34d399);--hs:rgba(16,185,129,.7)}
.prose h2:nth-of-type(5n+4){--hc:linear-gradient(135deg,#f59e0b,#fbbf24);--hs:rgba(245,158,11,.7)}
.prose h2:nth-of-type(5n+5){--hc:linear-gradient(135deg,#ec4899,#f472b6);--hs:rgba(236,72,153,.7)}
.prose>p:first-child::first-letter{float:left;font-size:3.6em;line-height:.9;margin:.06em .12em 0 0;font-weight:800;background:linear-gradient(135deg,#3fd0ff,#8b5cf6);-webkit-background-clip:text;background-clip:text;color:transparent}
.prose strong{background:linear-gradient(transparent 62%,rgba(63,208,255,.28) 62%);padding:0 2px}
.prose h3{color:#bfe9ff}

/* visual blocks: shared */
.vb{margin:1.8em 0!important;opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.vb.in{opacity:1;transform:none}
.vb figcaption{font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;font-weight:800;color:var(--cyan);margin-bottom:14px}

/* steps = flow diagram */
.steps{padding:20px;border-radius:20px;background:linear-gradient(160deg,rgba(30,144,255,.12),rgba(139,92,246,.08));border:1px solid rgba(63,208,255,.3)}
.steps ol{list-style:none;padding:0!important;display:grid;gap:0}
.steps li{position:relative;display:flex;gap:14px;align-items:flex-start;padding:0 0 18px}
.steps li:not(:last-child)::after{content:"";position:absolute;left:21px;top:44px;bottom:0;width:2px;background:linear-gradient(#3fd0ff,#8b5cf6)}
.steps li+li{margin-top:0!important}
.steps .sn{flex:none;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;font-weight:800;color:#fff;background:linear-gradient(135deg,#1e90ff,#8b5cf6);box-shadow:0 0 0 4px rgba(63,208,255,.15),0 8px 18px -6px rgba(30,144,255,.8)}
.steps b{display:block;color:#fff;font-size:1.02rem;line-height:1.3;margin-top:3px}
.steps li p{color:var(--soft);font-size:.94rem;margin-top:2px}
@media(min-width:760px){
 .steps ol{grid-auto-flow:column;grid-auto-columns:1fr;gap:10px}
 .steps li{flex-direction:column;align-items:center;text-align:center;padding:0 4px}
 .steps li:not(:last-child)::after{left:calc(50% + 30px);right:calc(-50% + 30px);top:21px;bottom:auto;width:auto;height:2px;background:linear-gradient(90deg,#3fd0ff,#8b5cf6)}
}

/* stats */
.stats .sg{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.st{padding:18px 16px;border-radius:16px;text-align:center;background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));border:1px solid rgba(120,170,255,.22)}
.st b{display:block;font-size:1.9rem;line-height:1.1;font-weight:800;background:linear-gradient(135deg,#3fd0ff,#a78bfa);-webkit-background-clip:text;background-clip:text;color:transparent}
.st span{display:block;margin-top:6px;font-size:.82rem;color:var(--muted);line-height:1.4}
.st:nth-child(3n+2) b{background-image:linear-gradient(135deg,#34d399,#3fd0ff)}
.st:nth-child(3n+3) b{background-image:linear-gradient(135deg,#fbbf24,#f472b6)}

/* callouts */
.call{display:flex;gap:14px;padding:16px 18px;border-radius:16px;border:1px solid;align-items:flex-start}
.call .ci{flex:none;width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:#fff}
.call .ci svg{width:22px;height:22px}
.call b{display:block;color:#fff;margin-bottom:2px}
.call p{margin:0;color:#dbe5f7;font-size:.97rem}
.call p+p{margin-top:.5em}
.call.tip{background:rgba(16,185,129,.09);border-color:rgba(52,211,153,.4)}.call.tip .ci{background:linear-gradient(135deg,#10b981,#34d399)}
.call.didyouknow{background:rgba(139,92,246,.1);border-color:rgba(167,139,250,.45)}.call.didyouknow .ci{background:linear-gradient(135deg,#8b5cf6,#c084fc)}
.call.warning{background:rgba(245,158,11,.09);border-color:rgba(251,191,36,.45)}.call.warning .ci{background:linear-gradient(135deg,#f59e0b,#f97316)}
.call.keyterm{background:rgba(30,144,255,.09);border-color:rgba(63,208,255,.4)}.call.keyterm .ci{background:linear-gradient(135deg,#1e90ff,#3fd0ff)}

/* myth vs fact */
.myth{display:grid;grid-template-columns:1fr 1fr;border-radius:18px;overflow:hidden;border:1px solid rgba(120,170,255,.22)}
.myth>div{padding:16px 18px}
.myth span{display:inline-block;font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;font-weight:800;padding:4px 10px;border-radius:999px;margin-bottom:8px}
.myth p{margin:0;font-size:.96rem}
.mm{background:rgba(239,68,68,.1)}.mm span{background:rgba(239,68,68,.2);color:#fca5a5}.mm p{color:#fecaca;text-decoration:line-through;text-decoration-color:rgba(239,68,68,.6)}
.mf{background:rgba(16,185,129,.1)}.mf span{background:rgba(16,185,129,.2);color:#6ee7b7}.mf p{color:#e8fff5}

/* compare */
.compare{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:stretch}
.compare>div:not(.vs){padding:16px 18px;border-radius:16px}
.compare h4{font-size:1.05rem;margin-bottom:8px;color:#fff}
.compare ul{padding-left:1.1em;color:var(--soft);font-size:.94rem}
.cl{background:linear-gradient(160deg,rgba(30,144,255,.16),rgba(30,144,255,.04));border:1px solid rgba(63,208,255,.35)}
.cr{background:linear-gradient(160deg,rgba(236,72,153,.14),rgba(236,72,153,.03));border:1px solid rgba(244,114,182,.35)}
.vs{align-self:center;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;font-weight:900;font-size:.85rem;color:#fff;background:linear-gradient(135deg,#1e90ff,#ec4899);box-shadow:0 8px 20px -6px rgba(236,72,153,.7)}

/* timeline */
.timeline ol{list-style:none;padding:0 0 0 18px!important;border-left:2px solid rgba(63,208,255,.35)}
.timeline li{position:relative;padding:0 0 14px 18px}
.timeline li::before{content:"";position:absolute;left:-26px;top:6px;width:14px;height:14px;border-radius:50%;background:linear-gradient(135deg,#3fd0ff,#8b5cf6);box-shadow:0 0 0 4px rgba(63,208,255,.15)}
.timeline time{font-weight:800;color:var(--cyan);font-size:.9rem}
.timeline p{margin:2px 0 0;color:var(--soft)}

/* pull quote */
.pull{position:relative;padding:22px 24px 22px 70px!important;border:0!important;border-radius:18px!important;background:linear-gradient(135deg,rgba(139,92,246,.16),rgba(63,208,255,.08))!important}
.pull svg{position:absolute;left:20px;top:22px;width:34px;height:34px;color:#a78bfa}
.pull p{font-size:1.2rem;line-height:1.5;color:#fff;font-weight:600;font-style:italic}
.pull cite{display:block;margin-top:8px;font-size:.85rem;color:var(--muted);font-style:normal}

/* photos */
.photo{border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#081233}
.photo img{width:100%;height:auto}
.photo figcaption{padding:10px 14px;font-size:.82rem;letter-spacing:0;text-transform:none;font-weight:400;color:var(--muted);margin:0}
.photo .cr{opacity:.7;font-size:.75rem}.photo .cr a{color:var(--muted)}

@media(max-width:600px){
 .myth,.compare{grid-template-columns:1fr}.vs{justify-self:center}
 .prose h2::before{width:36px;height:36px;font-size:.8rem;border-radius:10px}
 .pull{padding-left:20px!important;padding-top:56px!important}
}
@media (prefers-reduced-motion:reduce){.vb{opacity:1;transform:none;transition:none}}
/* ---- articles index (professional layout) ---- */
.lx-hero{text-align:center;padding:56px 0 34px;max-width:760px;margin:0 auto}
.lx-hero .eyebrow{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan);padding:6px 14px;border:1px solid rgba(63,208,255,.35);border-radius:999px;background:rgba(63,208,255,.07)}
.lx-hero h1{font-size:clamp(2rem,5vw,3.1rem);line-height:1.12;letter-spacing:-.02em;margin:18px 0 12px;color:#fff}
.lx-hero .grad{background:linear-gradient(90deg,#3fd0ff,#1e90ff 55%,#8b6bff);-webkit-background-clip:text;background-clip:text;color:transparent}
.lx-hero p{color:var(--muted);font-size:1.05rem;max-width:600px;margin:0 auto}
.trust{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:10px 22px;margin-top:22px;padding:0;font-size:.82rem;color:var(--soft)}
.trust li{display:flex;align-items:center;gap:8px}
.trust li::before{content:"";width:16px;height:16px;border-radius:50%;background:rgba(63,208,255,.15) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 8.3l2.2 2.2 4.8-5' fill='none' stroke='%233fd0ff' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/100% no-repeat}
.feature{display:grid;grid-template-columns:1.4fr 1fr;border:1px solid var(--line);border-radius:20px;overflow:hidden;background:linear-gradient(150deg,rgba(30,144,255,.10),rgba(255,255,255,.02));color:inherit;margin-bottom:48px;transition:border-color .25s,box-shadow .25s}
.feature:hover{text-decoration:none;border-color:rgba(63,208,255,.5);box-shadow:0 22px 50px -20px rgba(30,144,255,.55)}
.feature>*{min-width:0}
.feature .fimg{position:relative;overflow:hidden;min-height:320px}
.feature .fimg picture{position:absolute;inset:0}
.feature .fimg img{transition:transform .5s}
.feature:hover .fimg img{transform:scale(1.04)}
.feature .fb{padding:30px 32px;display:flex;flex-direction:column;gap:12px;justify-content:center}
.ftag{display:flex;align-items:center;gap:10px}
.ftag .new{font-size:.66rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#04122e;background:var(--cyan);padding:4px 10px;border-radius:6px}
.ftag .cat{font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);font-weight:700}
.feature h2{font-size:clamp(1.3rem,2.4vw,1.8rem);line-height:1.25;color:#fff;letter-spacing:-.01em}
.feature p{color:var(--muted);font-size:.95rem;line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.feature .read{margin-top:6px;font-weight:600;font-size:.9rem;color:var(--cyan)}
.feature .read b{display:inline-block;transition:transform .25s}
.feature:hover .read b{transform:translateX(4px)}
.cm{display:flex;gap:8px;align-items:center;font-size:.76rem;color:#6f86b5;margin-top:auto}
.cm span::before{content:"·";margin-right:8px}
.card .cm time{margin:0}
.browse .bh{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:16px}
.browse .bh h2{font-size:1.25rem;color:#fff;letter-spacing:-.01em}
.browse .search{width:min(320px,100%);padding:10px 16px;border-radius:10px;font-size:.9rem}
.browse .chips{justify-content:flex-start;margin-bottom:24px}
.browse .chip{border-radius:8px}
.soon{text-align:center;color:var(--muted);font-size:.9rem;padding:26px;border:1px dashed var(--line);border-radius:14px}
@media(max-width:820px){.feature{grid-template-columns:1fr}.feature .fimg{min-height:0;aspect-ratio:1200/630}.feature .fb{padding:22px}.browse .bh{flex-direction:column;align-items:stretch}.browse .search{width:100%}}