/* Precision 3D — Learn/blog pages + YouTube click-to-load facade */
.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px;margin-bottom:34px}
.blog-card{display:flex;flex-direction:column;text-decoration:none;color:inherit;transition:transform .35s cubic-bezier(.2,.7,.2,1),box-shadow .35s ease,border-color .35s}
.blog-card:hover{transform:translateY(-5px);border-color:#c7d7fe;box-shadow:0 24px 28px -20px rgba(29,78,216,.42),0 10px 16px -12px rgba(15,23,42,.18)}
.blog-card:focus-visible{outline:3px solid #93c5fd;outline-offset:2px}
.blog-thumb{background:linear-gradient(180deg,#f8fbff,#e8f0ff);padding:10px 16px 4px;border-bottom:1px solid var(--line)}
.blog-card h2{font-size:18px;margin:0 0 6px;color:var(--ink)}
.blog-card p{font-size:14px;margin:0 0 10px}
.blog-card .read{color:var(--brand);font-weight:600}
.post-ill{display:block;width:100%;max-width:420px;height:auto;margin:0 auto}
.post-main{max-width:760px}
.crumbs{font-size:14px;color:var(--muted);margin:4px 0 10px}.crumbs a{text-decoration:none}
.post-head h1{font-size:32px;line-height:1.2;margin:4px 0 6px}
.post-art{background:linear-gradient(180deg,#f8fbff,#e8f0ff);border:1px solid var(--line);border-radius:16px;padding:16px;margin:14px 0 22px}
.post-body{font-size:17px;line-height:1.7}
.post-body h2{font-size:22px;margin:28px 0 8px}
.post-body p,.post-body ul{margin:0 0 14px}.post-body li{margin:4px 0}
.pick-table{width:100%;border-collapse:collapse;font-size:15px;background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.pick-table th,.pick-table td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}.pick-table th{background:#f3f6fb}
.post-cta{display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin:28px 0;padding:18px 20px;border-radius:14px;
  background:linear-gradient(120deg,#eff6ff,#e0e7ff);border:1px solid #c7d7fe}
.post-cta p{margin:4px 0 0;color:var(--muted)}
.post-more{border-top:1px solid var(--line);padding-top:18px;margin-top:10px}.post-more ul{padding-left:18px}.post-more li{margin:6px 0}
/* videos */
.videos h2{margin-top:6px}
.yt-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px;margin:12px 0 10px}
.yt-grid.one{grid-template-columns:1fr}
.yt-card{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.yt-card figcaption{padding:12px 14px 14px;font-size:15px}
.yt{position:relative;aspect-ratio:16/9;background:#0f172a}
.yt iframe,.yt .yt-play,.yt img{position:absolute;inset:0;width:100%;height:100%;border:0}
.yt img{object-fit:cover;transition:transform .5s ease,filter .5s ease}
.yt-play:hover img{transform:scale(1.03);filter:brightness(.92)}
.yt-btn{position:absolute;left:50%;top:50%;width:68px;height:48px;margin:-24px 0 0 -34px;border-radius:14px;background:rgba(220,38,38,.92);box-shadow:0 6px 18px rgba(0,0,0,.3);transition:transform .25s ease}
.yt-btn::after{content:"";position:absolute;left:27px;top:14px;border-style:solid;border-width:10px 0 10px 17px;border-color:transparent transparent transparent #fff}
.yt-play:hover .yt-btn,.yt-play:focus-visible .yt-btn{transform:scale(1.08)}
.yt-play:focus-visible{outline:3px solid #93c5fd;outline-offset:-3px}
@media (max-width:560px){.post-head h1{font-size:25px}.post-body{font-size:16px}}
@media (prefers-reduced-motion:reduce){.blog-card,.blog-card:hover,.yt img,.yt-btn{transition:none;transform:none}}
/* FAQ page */
.faq-cats{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px}
.faq-cats a{padding:6px 12px;border-radius:999px;background:#eff6ff;border:1px solid #c7d7fe;text-decoration:none;font-size:14px;font-weight:600}
.faq-cats a:hover{background:#dbeafe}
.faq-group{margin:0 0 22px}.faq-group h2{font-size:20px;margin:0 0 10px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin:0 0 8px;transition:border-color .25s,box-shadow .25s}
.faq-item[open]{border-color:#c7d7fe;box-shadow:0 12px 20px -16px rgba(29,78,216,.45)}
.faq-item summary{cursor:pointer;list-style:none;padding:12px 44px 12px 14px;font-weight:600;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"";position:absolute;right:16px;top:50%;width:9px;height:9px;margin-top:-6px;border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(45deg);transition:transform .25s}
.faq-item[open] summary::after{transform:rotate(225deg);margin-top:-2px}
.faq-item summary:focus-visible{outline:3px solid #93c5fd;outline-offset:2px;border-radius:12px}
.faq-a{padding:0 14px 12px;color:#374151;line-height:1.6}.faq-a p{margin:0}
.faq-item[open] .faq-a{animation:pf-slide-in .3s ease}
.faq-teaser{display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin:0 0 30px;padding:16px 20px;border:1px solid var(--line);border-radius:14px;background:#fff}
.faq-teaser p{margin:4px 0 0;color:var(--muted)}
@media (prefers-reduced-motion:reduce){.faq-item[open] .faq-a{animation:none}.faq-item summary::after,.faq-item{transition:none}}