/* ==========================================================================
   TechWayFit — twf-styles-new.css
   Clean, reading-first design system. Standalone (no Bootstrap dependency).
   Works with enhancements.js (reading-progress, code-block-container, reading-time,
   back-to-top, .toc-list active highlighting) and quizs.js (quiz-* classes).
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root{
  --bg:#ffffff; --bg-subtle:#f6f7f9; --surface:#ffffff;
  --border:#e7e9ee; --border-strong:#d6dae1;
  --text:#0d1326; --text-soft:#3b4254; --text-muted:#6b7280;
  --brand:#2f6bff; --brand-ink:#1d4ed8; --brand-tint:#eef3ff;
  --accent:#0bb07b; --accent-tint:#e7f8f1; --accent-ink:#08855d;
  --warn:#c2710c; --warn-tint:#fdf3e6;
  --err:#dc4a3d; --err-tint:#fdecea;
  --code-bg:#0e1626; --code-border:#1e293b;
  --radius:14px; --radius-sm:10px; --maxw:1180px; --read:820px;
  --shadow-sm:0 1px 2px rgba(16,24,40,.05);
  --shadow-md:0 8px 24px -8px rgba(16,24,40,.14);
  --shadow-lg:0 24px 60px -18px rgba(16,24,40,.28);
  --font:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- Reset / base ---------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--text);background:var(--bg);
  line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto}
a{color:var(--brand-ink);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4,h5,h6{color:var(--text);font-weight:700;letter-spacing:-.02em;line-height:1.25}
hr{border:0;border-top:1px solid var(--border);margin:32px 0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}

/* ---------- Layout helpers ---------- */
.tw-wrap,.container{max-width:var(--maxw);margin:0 auto;padding-left:24px;padding-right:24px;width:100%}
.tw-section{padding:64px 0}
.tw-section.alt{background:var(--bg-subtle);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.tw-tag{font-size:11.5px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--brand-ink)}
.tw-sec-head{text-align:center;max-width:640px;margin:0 auto 40px}
.tw-sec-head h2{font-size:clamp(24px,3.2vw,33px);margin:10px 0;font-weight:800}
.tw-sec-head p{color:var(--text-muted);font-size:16px;margin:0}

/* ---------- Buttons ---------- */
.btn,.tw-btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:14.5px;
  padding:11px 20px;border-radius:11px;border:1px solid transparent;cursor:pointer;
  transition:.15s;text-decoration:none;line-height:1.2;font-family:inherit}
.btn:hover,.tw-btn:hover{text-decoration:none}
.btn-primary,.tw-btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover,.tw-btn-primary:hover{background:var(--brand-ink);color:#fff}
.btn-ghost,.tw-btn-ghost,.btn-outline-primary,.btn-outline-secondary{
  background:var(--surface);border-color:var(--border-strong);color:var(--text-soft)}
.btn-ghost:hover,.tw-btn-ghost:hover,.btn-outline-primary:hover,.btn-outline-secondary:hover{
  background:var(--bg-subtle);color:var(--text)}
.btn-secondary,.tw-btn-accent{background:var(--accent);color:#fff}
.btn-secondary:hover,.tw-btn-accent:hover{background:var(--accent-ink);color:#fff}
.btn-sm{padding:8px 14px;font-size:13px;border-radius:9px}
.btn:disabled,.tw-btn:disabled{opacity:.5;cursor:not-allowed}

/* ---------- Navbar ---------- */
.tw-nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);
  backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--border)}
.tw-nav-in{max-width:var(--maxw);margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;gap:28px}
.tw-brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em;color:var(--text);font-size:18px}
.tw-brand:hover{text-decoration:none;color:var(--text)}
.tw-brand img{height:34px;width:auto;display:block}
.tw-links{display:flex;gap:4px;margin-left:auto;align-items:center}
.tw-links a{color:var(--text-soft);font-weight:500;font-size:14.5px;padding:8px 12px;border-radius:8px}
.tw-links a:hover{background:var(--bg-subtle);text-decoration:none;color:var(--text)}
.tw-links .btn{margin-left:8px;padding:9px 16px}
.tw-burger{display:none;margin-left:auto;background:none;border:1px solid var(--border-strong);
  border-radius:9px;padding:8px 10px;cursor:pointer;color:var(--text-soft)}
.tw-burger svg{display:block}
@media(max-width:820px){
  .tw-burger{display:inline-flex}
  .tw-links{position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;
    gap:2px;background:#fff;border-bottom:1px solid var(--border);padding:10px 16px 16px;
    box-shadow:var(--shadow-md);display:none}
  .tw-links.open{display:flex}
  .tw-links a{padding:11px 12px}
  .tw-links .btn{margin:8px 0 0;justify-content:center}
}

/* ---------- Footer ---------- */
.tw-footer{background:#0c1326;color:#aab4c8;margin-top:0}
.tw-foot{max-width:var(--maxw);margin:0 auto;padding:44px 24px;display:flex;
  justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:center}
.tw-foot .fb{font-weight:800;color:#fff;font-size:17px}
.tw-foot .fb span{color:#7c8aa5;font-weight:500;font-size:13px;display:block}
.tw-foot a{color:#aab4c8;font-size:13.5px}
.tw-foot a:hover{color:#fff;text-decoration:none}
.tw-foot .links{display:flex;gap:18px;flex-wrap:wrap;align-items:center}
.tw-foot .sep{color:#3a455f}

/* ---------- Breadcrumb ---------- */
.tw-crumbs{font-size:13px;color:var(--text-muted);margin:0 0 18px;display:flex;gap:8px;flex-wrap:wrap;list-style:none;padding:0}
.tw-crumbs a{color:var(--text-muted)}
.tw-crumbs a:hover{color:var(--text)}
.tw-crumbs .sep{color:var(--border-strong)}
.tw-crumbs .cur{color:var(--text-soft)}

/* ==========================================================================
   ARTICLE / BLOG DETAIL
   ========================================================================== */
.tw-article-shell{padding:36px 0 72px}
.tw-article{max-width:var(--read);margin:0 auto}
/* full-width blog article — fills the container; TOC floats as a left overlay */
.tw-article.tw-article-wide{max-width:none;margin:0}
@media(min-width:1181px){.tw-article.tw-article-wide{padding-left:64px}}
.tw-eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;
  color:var(--brand-ink);background:var(--brand-tint);padding:5px 12px;border-radius:999px;margin-bottom:16px}
.tw-article h1.tw-title{font-size:clamp(30px,4vw,42px);line-height:1.12;font-weight:800;margin:0 0 16px}
.tw-meta{display:flex;align-items:center;gap:14px;color:var(--text-muted);font-size:14px;margin-bottom:24px;flex-wrap:wrap}
.tw-meta .who{display:flex;align-items:center;gap:9px}
.tw-meta .ava{width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--accent));
  color:#fff;display:grid;place-items:center;font-size:12px;font-weight:700}
.tw-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--border-strong)}
.tw-hero-img{width:100%;border-radius:var(--radius);border:1px solid var(--border);margin:8px 0 28px;
  max-height:380px;object-fit:cover;background:var(--bg-subtle)}

/* reading-time chip injected by enhancements.js (placed after h1) */
.reading-time{display:inline-flex;align-items:center;gap:7px;color:var(--text-muted);font-size:14px;margin:0 0 6px}
.reading-time i{color:var(--brand-ink)}

/* series strip */
.tw-series-strip{display:flex;align-items:center;gap:20px;flex-wrap:wrap;padding:14px 18px;margin:0 0 32px;
  border:1px solid var(--border);border-radius:var(--radius-sm);background:linear-gradient(180deg,#fbfcfe,#f6f7f9)}
.tw-series-strip .ss-label{font-size:11px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--text-muted);display:block}
.tw-series-strip .ss-name{font-weight:700;font-size:15px;color:var(--text)}
.tw-series-strip .ss-info{min-width:200px;flex:1}
.tw-series-strip .ss-btn{padding:7px 13px}
@media(max-width:560px){.tw-series-strip .ss-btn{display:none}}

/* ---------- Floating TOC (desktop) ---------- */
.tw-toc{position:fixed;left:20px;top:50%;transform:translateY(-50%);z-index:40;
  display:flex;flex-direction:column;gap:2px;padding:12px;border-radius:14px;max-width:300px;
  border:1px solid transparent;transition:background .2s,box-shadow .2s,border-color .2s}
.tw-toc .toc-h{font-size:11px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;
  color:var(--text-muted);margin:0 0 6px 2px;opacity:0;max-height:0;overflow:hidden;transition:.2s}
.tw-toc:hover{background:rgba(255,255,255,.96);box-shadow:var(--shadow-md);border-color:var(--border);backdrop-filter:blur(8px)}
.tw-toc:hover .toc-h{opacity:1;max-height:24px}
.tw-toc .toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.tw-toc .toc-list a{display:flex;align-items:center;gap:12px;height:26px;text-decoration:none;color:var(--text-muted)}
.tw-toc .toc-list a::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--border-strong);flex:none;transition:.2s}
.tw-toc .toc-list a .lbl,.tw-toc .toc-list a{white-space:nowrap}
.tw-toc .toc-list a .lbl{font-size:13.5px;opacity:0;max-width:0;overflow:hidden;transition:.2s}
.tw-toc:hover .toc-list a .lbl{opacity:1;max-width:250px}
.tw-toc .toc-list a:hover{color:var(--text)}
.tw-toc .toc-list a:hover::before{background:var(--text-muted)}
.tw-toc .toc-list a.active{color:var(--brand-ink);font-weight:600}
.tw-toc .toc-list a.active::before{background:var(--brand);width:26px}
.tw-toc .toc-list a.lvl-3{padding-left:14px}
.tw-toc .toc-list a.lvl-3::before{width:12px}

/* inline TOC (mobile) */
.tw-toc-inline{display:none;margin:0 0 26px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-subtle)}
.tw-toc-inline summary{cursor:pointer;padding:12px 16px;font-weight:600;font-size:14.5px;list-style:none}
.tw-toc-inline summary::-webkit-details-marker{display:none}
.tw-toc-inline summary::after{content:"▾";float:right;color:var(--text-muted)}
.tw-toc-inline[open] summary::after{content:"▴"}
.tw-toc-inline ul{list-style:none;margin:0;padding:0 16px 14px}
.tw-toc-inline a{display:block;padding:7px 0;color:var(--text-soft);font-size:14px;border-top:1px solid var(--border)}
@media(max-width:1180px){.tw-toc{display:none}.tw-toc-inline{display:block}}

/* ==========================================================================
   PROSE — authored blog/page content (.blog-content, .tw-prose, .page-content)
   ========================================================================== */
.blog-content,.tw-prose,.page-content{font-size:17px;color:var(--text-soft)}
.blog-content>p:first-of-type,.tw-prose>p:first-of-type{font-size:19px;color:var(--text);line-height:1.65}
.blog-content p,.tw-prose p,.page-content p{margin:0 0 18px}
.blog-content h2,.tw-prose h2,.page-content h2{font-size:25px;font-weight:700;margin:44px 0 14px;padding-top:8px;scroll-margin-top:90px}
.blog-content h3,.tw-prose h3,.page-content h3{font-size:19.5px;font-weight:700;margin:30px 0 10px;scroll-margin-top:90px}
.blog-content h4,.tw-prose h4{font-size:17px;font-weight:700;margin:24px 0 8px;scroll-margin-top:90px}
.blog-content ul,.blog-content ol,.tw-prose ul,.tw-prose ol,.page-content ul,.page-content ol{margin:0 0 18px;padding-left:24px}
.blog-content li,.tw-prose li,.page-content li{margin:0 0 8px}
.blog-content a,.tw-prose a{color:var(--brand-ink);text-decoration:underline;text-underline-offset:2px}
.blog-content strong,.tw-prose strong{color:var(--text);font-weight:700}
.blog-content blockquote,.tw-prose blockquote{margin:24px 0;padding:14px 20px;border-left:4px solid var(--brand);
  background:var(--brand-tint);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-soft);font-style:italic}
.blog-content img,.tw-prose img,.page-content img{border-radius:var(--radius-sm);border:1px solid var(--border);margin:8px 0}
.blog-content table,.tw-prose table,.page-content table,.table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;
  border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}
.blog-content th,.tw-prose th,.table th{background:var(--bg-subtle);text-align:left;font-weight:700;color:var(--text);padding:11px 14px;border-bottom:1px solid var(--border)}
.blog-content td,.tw-prose td,.table td{padding:11px 14px;border-bottom:1px solid var(--border);border-top:0}
.table-bordered td,.table-bordered th{border:1px solid var(--border)}
.blog-content tr:last-child td,.tw-prose tr:last-child td{border-bottom:0}

/* inline code */
.blog-content code,.tw-prose code,.page-content code{font-family:var(--mono);font-size:.86em;
  background:var(--brand-tint);color:var(--brand-ink);padding:2px 6px;border-radius:6px}
/* code blocks (pre) — both raw and JS-wrapped */
.blog-content pre,.tw-prose pre,pre{margin:0;background:var(--code-bg);color:#cdd6e4;padding:18px;
  overflow:auto;font-family:var(--mono);font-size:13.5px;line-height:1.7;border-radius:var(--radius-sm)}
.blog-content pre code,.tw-prose pre code,pre code{background:none;color:inherit;padding:0;font-size:inherit;border-radius:0}

/* code-block-container injected by enhancements.js */
.code-block-container{margin:22px 0;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--code-border);box-shadow:var(--shadow-md)}
.code-block-container pre{border-radius:0}
.code-block-header{display:flex;align-items:center;gap:8px;background:#0a1120;padding:9px 14px;border-bottom:1px solid var(--code-border)}
.code-language{font-family:var(--mono);font-size:11.5px;color:#7c8aa5;font-weight:600;letter-spacing:.04em}
.copy-button{margin-left:auto;background:rgba(255,255,255,.06);border:1px solid #28344b;color:#9fb0cc;
  font-size:12px;font-family:var(--mono);padding:5px 11px;border-radius:7px;cursor:pointer;transition:.15s;display:inline-flex;align-items:center;gap:6px}
.copy-button:hover{background:rgba(255,255,255,.12);color:#fff}
.copy-button.copied{background:var(--accent);border-color:var(--accent);color:#fff}

/* tabbed code blocks (.code-tabs) — authored content, switched by showTab() in blog-comment.js */
.code-tabs{margin:22px 0;border:1px solid var(--code-border);border-radius:var(--radius-sm);overflow:hidden;box-shadow:var(--shadow-md)}
.code-tabs .tab-buttons{display:flex;gap:2px;background:#0a1120;padding:6px 8px;border-bottom:1px solid var(--code-border)}
.code-tabs .tab-buttons button{flex:0 0 auto;border:0;background:transparent;color:#7c8aa5;font-family:var(--mono);
  font-size:12.5px;font-weight:600;padding:7px 16px;border-radius:8px;cursor:pointer;transition:.15s}
.code-tabs .tab-buttons button:hover{color:#cdd6e4;background:rgba(255,255,255,.06)}
.code-tabs .tab-buttons button.active{color:#fff;background:rgba(47,107,255,.22);box-shadow:inset 0 -2px 0 var(--brand)}
.code-tabs .tab-content{display:none}
.code-tabs .tab-content.active{display:block}
.code-tabs .tab-content pre{margin:0;border-radius:0}

/* callouts — author wraps content in these classes */
.tw-callout{display:flex;gap:14px;padding:16px 18px;border-radius:var(--radius-sm);margin:24px 0;border:1px solid var(--border);background:var(--bg-subtle)}
.tw-callout .ic{flex:none;width:34px;height:34px;border-radius:9px;display:grid;place-items:center;font-size:17px}
.tw-callout .ct{font-size:15px;color:var(--text-soft)}
.tw-callout .ct b,.tw-callout .ct strong{color:var(--text);display:block;margin-bottom:3px;font-size:14px}
.tw-callout.tip{background:var(--brand-tint);border-color:#cfe0ff}.tw-callout.tip .ic{background:#dbe7ff}
.tw-callout.warn{background:var(--warn-tint);border-color:#f3e2c4}.tw-callout.warn .ic{background:#f7e6c9}
.tw-callout.note{background:var(--accent-tint);border-color:#c8eede}.tw-callout.note .ic{background:#d2f1e4}

/* key takeaways */
.tw-takeaways{margin:40px 0;padding:24px 26px;border-radius:var(--radius);background:linear-gradient(180deg,#fbfcfe,#f6f7f9);border:1px solid var(--border)}
.tw-takeaways h3{margin:0 0 14px;font-size:17px}
.tw-takeaways ul{margin:0;padding:0;list-style:none;display:grid;gap:11px}
.tw-takeaways li{display:flex;gap:11px;font-size:15px;color:var(--text-soft)}
.tw-takeaways li::before{content:"✓";flex:none;width:22px;height:22px;border-radius:6px;background:var(--accent-tint);color:var(--accent);font-weight:700;font-size:13px;display:grid;place-items:center;margin-top:1px}

/* downloads + video */
.tw-dl{display:flex;align-items:center;gap:14px;padding:14px 16px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);transition:.15s;margin:14px 0}
.tw-dl:hover{border-color:var(--brand);box-shadow:var(--shadow-md);text-decoration:none}
.tw-dl .fic{width:40px;height:40px;border-radius:9px;background:var(--brand-tint);color:var(--brand-ink);display:grid;place-items:center;font-weight:700;font-size:11px}
.tw-dl .nm{font-weight:600;color:var(--text);font-size:14.5px}
.tw-dl .sz{font-size:12.5px;color:var(--text-muted)}
.blog-video-container,.tw-video{margin:28px 0}
.blog-video-container iframe,.tw-video iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:var(--radius);border:1px solid var(--border)}

/* prev/next pager */
.tw-pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:44px 0 0;border-top:1px solid var(--border);padding-top:28px}
.tw-pg{display:block;padding:16px 18px;border:1px solid var(--border);border-radius:var(--radius-sm);transition:.15s;background:var(--surface)}
.tw-pg:hover{border-color:var(--brand);box-shadow:var(--shadow-md);text-decoration:none}
.tw-pg .lbl{font-size:12px;color:var(--text-muted);font-weight:600}
.tw-pg .t{font-weight:600;color:var(--text);margin-top:4px}
.tw-pg.next{text-align:right}
.tw-series-back{text-align:center;margin-top:20px}
@media(max-width:560px){.tw-pager{grid-template-columns:1fr}.tw-pg.next{text-align:left}}

/* reading-progress bar (injected by enhancements.js, prepended to body) */
.reading-progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:60;
  background:linear-gradient(90deg,var(--brand),var(--accent));transition:width .1s}
/* back-to-top (injected) — override inline blue to brand */
.back-to-top{background:var(--brand)!important;box-shadow:0 8px 20px -6px rgba(47,107,255,.5)!important}

/* ==========================================================================
   PAGE HEADERS / HERO (series, lists)
   ========================================================================== */
.tw-page-header{position:relative;overflow:hidden;border-bottom:1px solid var(--border);
  background:radial-gradient(820px 360px at 8% -10%,rgba(47,107,255,.16),transparent 60%),
    radial-gradient(680px 340px at 96% 4%,rgba(11,176,123,.14),transparent 60%),
    linear-gradient(180deg,#fbfcff,#f5f7fb)}
.tw-page-header .ph-in{max-width:var(--maxw);margin:0 auto;padding:56px 24px 48px}
/* allow the search results dropdown to escape the header instead of being clipped */
.tw-page-header.has-search{overflow:visible}
.tw-page-header.has-search .ph-in{position:relative;z-index:5}
.tw-page-header.center{text-align:center}
.tw-page-header h1{font-size:clamp(30px,4.4vw,46px);line-height:1.1;font-weight:800;margin:14px 0 12px}
.tw-page-header p{font-size:17.5px;color:var(--text-soft);margin:0 auto;max-width:54ch}
.tw-kicker{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;color:var(--brand-ink);background:#fff;border:1px solid #d7e3ff;padding:6px 13px;border-radius:999px;box-shadow:var(--shadow-sm)}

/* series hero (split) */
.tw-series-hero{display:grid;grid-template-columns:1.5fr 1fr;gap:40px;align-items:center}
@media(max-width:860px){.tw-series-hero{grid-template-columns:1fr;gap:28px}}
.tw-series-hero .art{aspect-ratio:4/3;border-radius:var(--radius);border:1px solid var(--border);overflow:hidden;box-shadow:var(--shadow-md);background:var(--bg-subtle)}
.tw-series-hero .art img{width:100%;height:100%;object-fit:cover}
.tw-stats-inline{display:flex;gap:26px;flex-wrap:wrap;margin-top:6px}
.tw-stats-inline .n{font-size:24px;font-weight:800;color:var(--text)}
.tw-stats-inline .l{font-size:13px;color:var(--text-muted)}
.tw-hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}

/* ==========================================================================
   CARDS / GRIDS
   ========================================================================== */
.tw-grid{display:grid;gap:22px}
.tw-grid.cols-2{grid-template-columns:repeat(2,1fr)}
.tw-grid.cols-3{grid-template-columns:repeat(3,1fr)}
.tw-grid.cols-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.tw-grid.cols-3,.tw-grid.cols-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.tw-grid.cols-2,.tw-grid.cols-3,.tw-grid.cols-4{grid-template-columns:1fr}}

.tw-card{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;background:var(--surface);transition:.18s;text-decoration:none;color:inherit}
.tw-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);border-color:var(--border-strong);text-decoration:none}
.tw-card .thumb{aspect-ratio:16/9;width:100%;object-fit:cover;background:var(--bg-subtle);position:relative;display:block}
.tw-card .thumb-wrap{position:relative}
.tw-card .num{position:absolute;top:12px;left:12px;background:rgba(13,19,38,.78);color:#fff;font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;backdrop-filter:blur(4px)}
.tw-card .body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.tw-card h3,.tw-card h4{margin:0 0 8px;font-size:16.5px;line-height:1.3}
.tw-card p{margin:0 0 16px;color:var(--text-muted);font-size:14px;flex:1}
.tw-card .foot{display:flex;align-items:center;justify-content:space-between;color:var(--text-muted);font-size:12.5px;border-top:1px solid var(--border);padding-top:13px}
.tw-card .cat{font-size:11.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--accent-ink);background:var(--accent-tint);padding:4px 10px;border-radius:999px;align-self:flex-start;margin-bottom:12px}

/* featured (split) card */
.tw-feature{display:grid;grid-template-columns:1.1fr 1fr;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--surface);transition:.18s;text-decoration:none;color:inherit}
.tw-feature:hover{box-shadow:var(--shadow-md);border-color:var(--border-strong);text-decoration:none}
@media(max-width:760px){.tw-feature{grid-template-columns:1fr}}
.tw-feature img{width:100%;height:100%;min-height:240px;object-fit:cover;background:var(--bg-subtle)}
.tw-feature .body{padding:30px}
.tw-feature .pill{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--accent-ink);background:var(--accent-tint);padding:5px 11px;border-radius:999px}
.tw-feature h3{font-size:25px;margin:14px 0 10px}
.tw-feature p{color:var(--text-soft);font-size:15.5px;margin:0 0 18px}
.tw-feature .who{display:flex;align-items:center;gap:10px;color:var(--text-muted);font-size:13.5px}

/* topic card */
.tw-topic{border:1px solid var(--border);border-radius:var(--radius);padding:24px;background:var(--surface);transition:.18s;display:block;text-decoration:none;color:inherit}
.tw-topic:hover{box-shadow:var(--shadow-md);border-color:var(--brand);transform:translateY(-3px);text-decoration:none}
.tw-topic .ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:22px;margin-bottom:14px;background:var(--brand-tint)}
.tw-topic h3{font-size:16.5px;margin:0 0 8px}
.tw-topic p{font-size:13.5px;color:var(--text-muted);margin:0 0 14px}
.tw-topic .go{font-size:13.5px;font-weight:700;color:var(--brand-ink)}
.tw-topic .badges{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}

/* badge */
.tw-badge,.badge{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:700;padding:4px 10px;border-radius:999px;background:var(--brand-tint);color:var(--brand-ink)}
.tw-badge.accent{background:var(--accent-tint);color:var(--accent-ink)}

/* ==========================================================================
   SERIES / BLOG GROUP DETAIL
   ========================================================================== */
.tw-series-list{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:900px){.tw-series-list{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.tw-series-list{grid-template-columns:1fr}}
.tw-quiz-cta-card{display:flex;gap:18px;align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:.16s;text-decoration:none;color:inherit}
.tw-quiz-cta-card:hover{box-shadow:var(--shadow-md);border-color:var(--accent);text-decoration:none}
.tw-quiz-cta-card .qic{flex:none;width:60px;height:60px;border-radius:14px;background:var(--accent-tint);display:grid;place-items:center;font-size:26px;overflow:hidden}
.tw-quiz-cta-card .qic img{width:100%;height:100%;object-fit:cover}
.tw-quiz-cta-card h4{margin:0 0 4px;font-size:16px}
.tw-quiz-cta-card p{margin:0;color:var(--text-muted);font-size:13.5px}
.tw-quiz-cta-card .go{margin-left:auto;flex:none;color:var(--accent);font-weight:700;font-size:20px}

/* ==========================================================================
   FEATURED / TESTIMONIAL / CTA (home + pages)
   ========================================================================== */
.tw-fcard{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:28px;transition:.18s;display:flex;flex-direction:column;text-decoration:none;color:inherit}
.tw-fcard:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);border-color:var(--border-strong);text-decoration:none}
.tw-fcard .ic{width:50px;height:50px;border-radius:13px;background:linear-gradient(135deg,var(--brand-tint),var(--accent-tint));display:grid;place-items:center;font-size:24px;margin-bottom:16px}
.tw-fcard h3{margin:0 0 10px;font-size:19px}
.tw-fcard ul{margin:0 0 18px;padding-left:18px;color:var(--text-muted);font-size:14px;flex:1}
.tw-fcard .go{font-weight:700;color:var(--brand-ink);font-size:14px}

.tw-tcard{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:26px}
.tw-tcard .stars{color:#f5a623;font-size:15px;letter-spacing:2px;margin-bottom:12px}
.tw-tcard p{font-size:15px;color:var(--text-soft);margin:0 0 18px}
.tw-tcard .who{display:flex;align-items:center;gap:11px}
.tw-tcard .ava{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;font-size:14px;background:linear-gradient(135deg,var(--brand),var(--accent))}
.tw-tcard .nm{font-weight:700;font-size:14px;color:var(--text)}
.tw-tcard .rl{font-size:12.5px;color:var(--text-muted)}

.tw-stats-band{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.tw-stats-band .in{max-width:var(--maxw);margin:0 auto;padding:30px 24px;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;text-align:center}
@media(max-width:600px){.tw-stats-band .in{grid-template-columns:1fr;gap:14px}}
.tw-stats-band .n{font-size:34px;font-weight:900;letter-spacing:-.03em;background:linear-gradient(120deg,var(--brand),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.tw-stats-band .l{color:var(--text-muted);font-size:14px;font-weight:500}

.tw-cta{position:relative;overflow:hidden;border-radius:20px;margin:0 auto;max-width:var(--maxw);
  background:linear-gradient(120deg,#0d1326,#1d2a4d);color:#fff;text-align:center}
.tw-cta .inner{padding:56px 24px;position:relative;z-index:1}
.tw-cta .glow{position:absolute;inset:0;background:radial-gradient(500px 220px at 30% 0%,rgba(47,107,255,.5),transparent 60%),radial-gradient(420px 200px at 80% 100%,rgba(11,176,123,.4),transparent 60%)}
.tw-cta h2{font-size:clamp(26px,3.4vw,36px);font-weight:800;margin:0 0 12px;color:#fff}
.tw-cta p{color:#aab4c8;font-size:16.5px;max-width:46ch;margin:0 auto 26px}
.tw-cta .btn-ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.25);color:#fff}
.tw-cta .btn-ghost:hover{background:rgba(255,255,255,.16);color:#fff}

/* home hero */
.tw-home-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--border);
  background:radial-gradient(820px 360px at 8% -10%,rgba(47,107,255,.18),transparent 60%),
    radial-gradient(680px 340px at 96% 4%,rgba(11,176,123,.16),transparent 60%),
    linear-gradient(180deg,#fbfcff,#f5f7fb)}
.tw-home-hero .grid{position:absolute;inset:0;background-image:linear-gradient(var(--border) 1px,transparent 1px),linear-gradient(90deg,var(--border) 1px,transparent 1px);background-size:40px 40px;opacity:.35;mask-image:radial-gradient(circle at 50% 0%,#000,transparent 75%)}
.tw-home-hero .in{position:relative;max-width:var(--maxw);margin:0 auto;padding:70px 24px 64px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
@media(max-width:880px){.tw-home-hero .in{grid-template-columns:1fr;padding:48px 24px}}
.tw-home-hero h1{font-size:clamp(34px,5vw,54px);line-height:1.06;font-weight:900;margin:20px 0 18px}
.tw-home-hero h1 .grad{background:linear-gradient(120deg,var(--brand),#7c4dff 60%,var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.tw-home-hero .sub{font-size:18.5px;color:var(--text-soft);max-width:48ch;margin:0 0 28px}
.tw-codecard{border-radius:var(--radius);overflow:hidden;border:1px solid #1e293b;box-shadow:var(--shadow-lg)}
.tw-codecard .ch{display:flex;align-items:center;gap:8px;background:#0a1120;padding:11px 14px;border-bottom:1px solid #1e293b}
.tw-codecard .ch i{width:11px;height:11px;border-radius:50%;display:block}
.tw-codecard .ch i:nth-child(1){background:#ff5f57}.tw-codecard .ch i:nth-child(2){background:#febc2e}.tw-codecard .ch i:nth-child(3){background:#28c840}
.tw-codecard .ch span{margin-left:auto;font-family:var(--mono);font-size:12px;color:#7c8aa5}

/* mini quiz (home) */
.tw-miniquiz{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);overflow:hidden}
.tw-miniquiz .mq-head{padding:16px 22px;background:linear-gradient(120deg,#0d1326,#1d2a4d);color:#fff;display:flex;align-items:center;gap:10px;font-weight:700}
.tw-miniquiz .mq-body{padding:24px}
.tw-miniquiz .mqopt{display:flex;align-items:center;gap:12px;padding:13px 15px;border:1.5px solid var(--border);border-radius:10px;cursor:pointer;margin-bottom:10px;font-size:14.5px;color:var(--text-soft);transition:.14s}
.tw-miniquiz .mqopt:hover{border-color:var(--brand);background:var(--brand-tint)}
.tw-miniquiz .mqopt .key{width:26px;height:26px;flex:none;border-radius:7px;border:1.5px solid var(--border-strong);display:grid;place-items:center;font-weight:700;font-size:12px;color:var(--text-muted);background:var(--bg-subtle)}
.tw-miniquiz .mqopt.correct{border-color:var(--accent);background:var(--accent-tint)}
.tw-miniquiz .mqopt.correct .key{background:var(--accent);color:#fff;border-color:var(--accent)}
.tw-miniquiz .mqopt.wrong{border-color:var(--err);background:var(--err-tint)}
.tw-learn{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
@media(max-width:880px){.tw-learn{grid-template-columns:1fr;gap:32px}}
.tw-lrow{display:flex;gap:16px;margin-bottom:18px}
.tw-lrow .ic{flex:none;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:20px;background:var(--brand-tint)}
.tw-lrow h3{margin:0 0 4px;font-size:16.5px}
.tw-lrow p{margin:0;color:var(--text-muted);font-size:14px}

/* ==========================================================================
   BLOG LIST — search
   ========================================================================== */
.tw-search,.search-wrapper{max-width:640px;margin:0 auto;position:relative;text-align:left}
.search-bar-group{display:flex;gap:0;border:1px solid var(--border-strong);border-radius:12px;overflow:hidden;background:#fff;box-shadow:var(--shadow-sm)}
.search-bar-group select,.search-bar-group input{border:0;padding:13px 14px;font-size:15px;font-family:inherit;background:#fff;color:var(--text);outline:none}
.search-bar-group select{border-right:1px solid var(--border);color:var(--text-soft);max-width:150px}
.search-bar-group input{flex:1;min-width:0}
.search-bar-group button{border:0;background:var(--brand);color:#fff;padding:0 18px;cursor:pointer;font-size:16px}
.search-bar-group button:hover{background:var(--brand-ink)}
/* results dropdown — JS toggles .show and fills #search-results with .search-item rows */
.search-results{position:absolute;left:0;right:0;top:calc(100% + 8px);z-index:60;
  background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow-lg);
  padding:6px;display:none;max-height:420px;overflow:auto}
.search-results.show{display:block}
.search-results ul{list-style:none;margin:0;padding:0}
.search-item{display:block;padding:11px 13px;border-radius:9px;transition:background .12s}
.search-item:hover{background:var(--bg-subtle)}
.search-item+.search-item{border-top:1px solid var(--border)}
.search-item .result-title{display:block;color:var(--text);font-weight:700;font-size:15px;text-decoration:none}
.search-item .result-title:hover{color:var(--brand-ink)}
.search-item .result-desc{display:block;color:var(--text-muted);font-size:13px;margin:3px 0 6px;line-height:1.45}
.search-item .category-badge{display:inline-flex;align-items:center;font-size:11px;font-weight:700;letter-spacing:.03em;
  text-transform:uppercase;color:var(--accent-ink);background:var(--accent-tint);padding:3px 9px;border-radius:999px}
.search-item.text-muted{color:var(--text-muted);font-size:14px;text-align:center;padding:16px}
.search-results mark{background:#fff3bf;color:inherit;padding:0 2px;border-radius:3px}

/* ==========================================================================
   FORMS + CONTACT
   ========================================================================== */
.tw-form{max-width:560px;margin:0 auto;text-align:left}
.tw-field{margin-bottom:18px}
.tw-form label,label.tw-label{display:block;font-weight:600;font-size:14px;color:var(--text);margin-bottom:7px}
.form-control,.tw-input{width:100%;font-family:inherit;font-size:15px;color:var(--text);background:#fff;
  border:1px solid var(--border-strong);border-radius:10px;padding:12px 14px;transition:.15s;outline:none}
.form-control::placeholder,.tw-input::placeholder{color:#9aa3b2}
.form-control:focus,.tw-input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint)}
textarea.form-control{resize:vertical;min-height:120px}
.alert{padding:13px 16px;border-radius:10px;font-size:14.5px;border:1px solid transparent}
.alert-success{background:var(--accent-tint);border-color:#c8eede;color:var(--accent-ink)}
.alert-danger{background:var(--err-tint);border-color:#f4c7c2;color:#a3271c}
.text-dark{color:var(--text)!important}
.tw-prose .btn,.tw-prose a.btn{text-decoration:none}
/* contact cards (Discord / email) */
.tw-contact-cards{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:0 0 8px}
@media(max-width:640px){.tw-contact-cards{grid-template-columns:1fr}}
.tw-contact-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:24px;text-align:center}
.tw-contact-card .ic{width:48px;height:48px;border-radius:12px;display:grid;place-items:center;font-size:22px;margin:0 auto 12px;background:var(--brand-tint)}
.tw-contact-card.accent .ic{background:var(--accent-tint)}
.tw-contact-card h3{margin:0 0 6px;font-size:17px}
.tw-contact-card p{margin:0 0 14px;color:var(--text-muted);font-size:14px}
.tw-form-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:32px;box-shadow:var(--shadow-sm)}
.tw-form-card h2{text-align:center;font-size:24px;margin:0 0 8px}
.tw-form-card .lead{text-align:center;margin:0 auto 24px;max-width:48ch}

/* ==========================================================================
   QUIZ — intro + container theming. (quiz-enhancements-min.css styles the
   interactive innards built by quizs.js; we theme the shell + a few accents.)
   ========================================================================== */
.tw-quiz-intro{text-align:center;max-width:760px;margin:0 auto 8px}
.tw-quiz-intro .eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;color:var(--accent-ink);background:var(--accent-tint);padding:5px 13px;border-radius:999px}
.tw-quiz-intro h1{font-size:clamp(26px,4vw,36px);margin:14px 0 8px}
.tw-quiz-intro p{color:var(--text-soft);font-size:16px;margin:0 auto;max-width:52ch}
.tw-quiz-facts{display:flex;gap:10px;justify-content:center;margin-top:16px;flex-wrap:wrap}
.tw-quiz-facts .fact{font-size:13px;color:var(--text-soft);background:var(--surface);border:1px solid var(--border);padding:7px 14px;border-radius:999px;font-weight:500}
.quiz-container{max-width:760px;margin:0 auto 64px;padding:0 24px}

/* ---------- Generic utilities (compat for authored content) ---------- */
.text-center{text-align:center}.text-end{text-align:right!important}.text-start{text-align:left}
.text-muted{color:var(--text-muted)!important}
.img-fluid{max-width:100%;height:auto}
.rounded{border-radius:var(--radius-sm)}
.w-100{width:100%}
.mb-0{margin-bottom:0}.mb-1{margin-bottom:.25rem}.mb-2{margin-bottom:.5rem}.mb-3{margin-bottom:1rem}
.mb-4{margin-bottom:1.5rem}.mb-5{margin-bottom:3rem}.mt-2{margin-top:.5rem}.mt-3{margin-top:1rem}.mt-5{margin-top:3rem}
.lead{font-size:19px;color:var(--text-soft)}
.d-none{display:none!important}
.d-block{display:block}
/* minimal grid compat for authored blog bodies using row/col */
.row{display:flex;flex-wrap:wrap;gap:0;margin:0 -12px}
.row>[class*="col"]{padding:0 12px;flex:1 1 0;min-width:0}
.col-12{flex:0 0 100%;max-width:100%}
.col-5{flex:0 0 41.66%}.col-md-5{flex:0 0 41.66%}
.col-md-6{flex:0 0 50%;max-width:50%}
.col-lg-3{flex:0 0 25%}.col-lg-4{flex:0 0 33.33%}.col-lg-7{flex:0 0 58.33%}.col-lg-8{flex:0 0 66.66%}.col-lg-9{flex:0 0 75%}
@media(max-width:760px){.row{flex-direction:column;margin:0}.row>[class*="col"]{flex:1 1 100%;max-width:100%;padding:0}}
.justify-content-center{justify-content:center}.justify-content-between{justify-content:space-between}
.align-items-center{align-items:center}.d-flex{display:flex}

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