/* ============================================================
   BLOG — Insight Feed (index) + Article (single)
   Ported from design_handoff_cyberx/Blog V2.html + Blog Post.html.
   ============================================================ */

/* ===================== INDEX (bf-*) ===================== */
.bf-hero { position: relative; overflow: hidden; padding: 124px 0 46px;
  background: radial-gradient(115% 80% at 82% 4%, rgba(255,75,38,.15), transparent 55%), linear-gradient(180deg,#0b0608 0%,var(--bg) 86%); }
.bf-hero .wrap { position: relative; z-index: 2; }
.bf-term { display: inline-flex; align-items: center; gap: 14px; padding: 9px 16px; border: 1px solid var(--line-2); border-radius: 10px; background: rgba(18,20,25,.7); backdrop-filter: blur(6px); font-family: var(--mono); font-size: .82rem; color: var(--muted); }
.bf-term .dots { display: flex; gap: 6px; }
.bf-term .dots i { width: 9px; height: 9px; border-radius: 50%; display: block; }
.bf-term .dots i:nth-child(1){background:#FF5F57} .bf-term .dots i:nth-child(2){background:#FEBC2E} .bf-term .dots i:nth-child(3){background:#28C840}
.bf-term b { color: var(--brand-2); font-weight: 500; }
.bf-term .cur { width: 8px; height: 16px; background: var(--brand-2); display: inline-block; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.bf-hero h1 { font-size: clamp(2rem,4.2vw,3.5rem); font-weight: 800; letter-spacing: -.03em; margin: 24px 0 0; text-wrap: balance; max-width: 18ch; }
.bf-hero h1 .hl { background: linear-gradient(110deg,var(--brand-2),var(--brand)); -webkit-background-clip:text; background-clip:text; color:transparent; }
.bf-hero .lead { font-size: clamp(1.02rem,1.4vw,1.18rem); color: var(--muted); max-width: 660px; margin: 22px 0 0; line-height: 1.7; }

.bf-main { background: linear-gradient(180deg,var(--bg),var(--bg-2)); padding: 60px 0 110px; position: relative; }
.bf-layout { display: grid; grid-template-columns: 250px 1fr; gap: 56px; align-items: start; }

.bf-side { position: sticky; top: 102px; }
.bf-side h4 { font-family: var(--mono); font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; color: var(--dim); margin-bottom: 16px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.bf-cats { display: flex; flex-direction: column; gap: 4px; margin-bottom: 32px; }
.bf-cat { display: flex; align-items: center; gap: 11px; padding: 10px 12px; border-radius: 9px; color: var(--muted); cursor: pointer; font-size: .92rem; font-weight: 500; border: 1px solid transparent; transition: all .22s var(--ease); background: none; text-align: left; width: 100%; }
.bf-cat .d { width: 9px; height: 9px; border-radius: 50%; background: var(--ac, var(--brand)); flex-shrink: 0; }
.bf-cat .ct { margin-left: auto; font-family: var(--mono); font-size: .76rem; color: var(--dim); }
.bf-cat:hover { color: var(--text); background: rgba(255,255,255,.03); transform: translateX(3px); }
.bf-cat.on { color: var(--text); background: rgba(var(--rgb,255,75,38),.1); border-color: rgba(var(--rgb,255,75,38),.32); }
.bf-side-cta { margin-top: 8px; padding: 22px 20px; border-radius: 14px; border: 1px solid var(--line); background: linear-gradient(180deg, rgba(255,75,38,.08), rgba(18,20,25,.5)); }
.bf-side-cta h5 { font-size: 1rem; font-weight: 700; }
.bf-side-cta p { color: var(--muted); font-size: .86rem; line-height: 1.55; margin: 8px 0 16px; }
.bf-side-cta .btn { width: 100%; justify-content: center; padding: 11px; font-size: .9rem; }

.bf-feed { min-width: 0; display: flex; flex-direction: column; }
.bf-row { position: relative; display: grid; grid-template-columns: 52px 168px 1fr; gap: 24px; align-items: center;
  padding: 26px 8px 26px 18px; border-top: 1px solid var(--line); text-align: left; transition: background .25s var(--ease); }
.bf-row:first-child { border-top: none; }
.bf-row::before { content: ""; position: absolute; left: 0; top: 14px; bottom: 14px; width: 3px; border-radius: 3px; background: var(--ac); transform: scaleY(0); transform-origin: center; transition: transform .3s var(--ease); }
.bf-row:hover { background: rgba(255,255,255,.02); }
.bf-row:hover::before { transform: scaleY(1); }
.bf-row.hide { display: none; }
.bf-idx { font-family: var(--mono); font-size: 1.1rem; color: var(--dim); font-weight: 600; }
.bf-thumb { position: relative; height: 104px; border-radius: 12px; overflow: hidden; border: 1px solid var(--line); }
.bf-thumb canvas, .bf-thumb img { width: 100%; height: 100%; display: block; object-fit: cover; transition: transform .4s var(--ease); }
.bf-row:hover .bf-thumb canvas, .bf-row:hover .bf-thumb img { transform: scale(1.07); }
.bf-body { min-width: 0; }
.bf-tags { display: flex; align-items: center; gap: 12px; font-family: var(--mono); font-size: .76rem; color: var(--dim); margin-bottom: 10px; flex-wrap: wrap; }
.bf-tags .cat { color: var(--ac); letter-spacing: .06em; }
.bf-body h3 { font-size: clamp(1.15rem,1.7vw,1.5rem); font-weight: 700; letter-spacing: -.015em; line-height: 1.22; transition: color .2s; }
.bf-row:hover .bf-body h3 { color: var(--ac); }
.bf-body p { color: var(--muted); font-size: .98rem; line-height: 1.6; margin-top: 10px; max-width: 60ch; }
.bf-go { font-family: var(--mono); font-size: .84rem; color: var(--ac); margin-top: 14px; display: inline-flex; align-items: center; gap: 8px; opacity: .85; }
.bf-go .ar { transition: transform .25s var(--ease); }
.bf-row:hover .bf-go .ar { transform: translateX(4px); }

.bf-find { background: var(--bg); }
.bf-find-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 12px; }
.bf-find-card { padding: 24px 20px 26px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); transition: transform .3s var(--ease), border-color .3s; }
.bf-find-card:hover { transform: translateY(-5px); border-color: rgba(var(--rgb),.4); }
.bf-find-ic { width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center; background: rgba(var(--rgb),.12); border: 1px solid rgba(var(--rgb),.28); color: var(--ac); margin-bottom: 16px; }
.bf-find-ic svg { width: 22px; height: 22px; }
.bf-find-card h3 { font-size: 1rem; font-weight: 700; line-height: 1.25; }
.bf-find-card p { color: var(--muted); font-size: .9rem; line-height: 1.55; margin-top: 10px; }

.bf-why { position: relative; overflow: hidden; background: radial-gradient(80% 70% at 85% 10%, rgba(37,224,138,.1), transparent 55%), linear-gradient(180deg,var(--bg-2),#07090A); text-align: center; }
.bf-why .wrap { max-width: 880px; }
.bf-why .quote { font-size: clamp(1.6rem,3vw,2.5rem); font-weight: 800; letter-spacing: -.02em; line-height: 1.2; text-wrap: balance; }
.bf-why p { color: var(--muted); font-size: 1.05rem; line-height: 1.7; margin-top: 22px; }
.bf-why p.b { color: var(--text); }

.bf-sub { position: relative; overflow: hidden; text-align: center; padding: 110px 0;
  background: radial-gradient(80% 120% at 50% 0%, rgba(255,75,38,.26), transparent 60%), linear-gradient(180deg,#14060a,#0b0507); }
.bf-sub::before { content:""; position:absolute; inset:0; background-image: linear-gradient(rgba(255,75,38,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,75,38,.06) 1px,transparent 1px); background-size:54px 54px; mask-image: radial-gradient(60% 80% at 50% 40%,#000,transparent); }
.bf-sub .wrap { position: relative; z-index: 2; }
.bf-sub h2 { font-size: clamp(2rem,4vw,3.2rem); margin: 16px auto 0; max-width: 16ch; text-wrap: balance; }
.bf-sub p { color: var(--muted); font-size: 1.1rem; max-width: 600px; margin: 18px auto 0; line-height: 1.65; }
.bf-form { display: flex; gap: 12px; max-width: 520px; margin: 38px auto 0; flex-wrap: wrap; justify-content: center; }
.bf-form input { flex: 1; min-width: 240px; padding: 15px 22px; border-radius: 999px; border: 1px solid var(--line-2); background: rgba(255,255,255,.05); color: var(--text); font-family: inherit; font-size: 1rem; }
.bf-form input::placeholder { color: var(--dim); }
.bf-form input:focus { outline: none; border-color: var(--brand); background: rgba(255,255,255,.08); }

@media (max-width: 980px) {
  .bf-layout { grid-template-columns: 1fr; gap: 28px; }
  .bf-side { position: static; display: grid; grid-template-columns: 1fr; gap: 18px; }
  .bf-cats { flex-direction: row; flex-wrap: wrap; }
  .bf-cat { width: auto; }
  .bf-cat .ct { display: none; }
  .bf-find-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 640px) {
  .bf-hero { padding: 128px 0 36px; }
  .bf-row { grid-template-columns: 1fr; gap: 14px; }
  .bf-idx, .bf-thumb { display: none; }
  .bf-find-grid { grid-template-columns: 1fr; }
}

/* ===================== ARTICLE (ap-*) ===================== */
.ap-article-page { --pac: #2D7FF9; --prgb: 45,127,249; }
.ap-progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; z-index: 200; background: linear-gradient(90deg, var(--pac), #5B9BFF); box-shadow: 0 0 10px rgba(var(--prgb),.6); transition: width .1s linear; }

.ap-hero { position: relative; overflow: hidden; padding: 130px 0 0;
  background: radial-gradient(110% 80% at 80% 0%, rgba(var(--prgb),.18), transparent 56%), linear-gradient(180deg,#0a0d12 0%,var(--bg) 90%); }
.ap-hero .wrap { position: relative; z-index: 2; max-width: 880px; }
.ap-crumbs { font-family: var(--mono); font-size: .78rem; color: var(--dim); display: flex; gap: 10px; align-items: center; }
.ap-crumbs a { color: var(--muted); transition: color .2s; }
.ap-crumbs a:hover { color: var(--pac); }
.ap-badge { display: inline-flex; align-items: center; gap: 9px; margin-top: 26px; font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; padding: 8px 15px; border-radius: 999px; background: rgba(var(--prgb),.14); border: 1px solid rgba(var(--prgb),.35); color: var(--pac); }
.ap-badge .d { width: 7px; height: 7px; border-radius: 50%; background: var(--pac); box-shadow: 0 0 10px var(--pac); }
.ap-hero h1 { font-size: clamp(2.1rem,4.4vw,3.5rem); font-weight: 800; letter-spacing: -.025em; line-height: 1.08; margin: 22px 0 0; text-wrap: balance; }
.ap-byline { display: flex; align-items: center; gap: 16px; margin: 28px 0 36px; flex-wrap: wrap; }
.ap-avatar { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; background: linear-gradient(135deg, var(--brand-2), var(--brand)); color: #fff; font-weight: 700; font-size: 1rem; }
.ap-byline .who { font-size: .95rem; font-weight: 600; color: var(--text); }
.ap-byline .meta { font-family: var(--mono); font-size: .8rem; color: var(--dim); margin-top: 2px; }
.ap-share { display: flex; gap: 8px; margin-left: auto; }
.ap-share a { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 10px; display: grid; place-items: center; color: var(--muted); transition: all .25s var(--ease); }
.ap-share a:hover { color: var(--text); border-color: var(--line-2); transform: translateY(-2px); }
.ap-share svg { width: 17px; height: 17px; }

.ap-cover { position: relative; height: clamp(260px, 42vw, 460px); border-radius: 20px 20px 0 0; overflow: hidden; border: 1px solid var(--line); border-bottom: none; }
.ap-cover canvas, .ap-cover img { width: 100%; height: 100%; display: block; object-fit: cover; }
.ap-cover .cap { position: absolute; left: 18px; bottom: 14px; font-family: var(--mono); font-size: .7rem; color: rgba(255,255,255,.6); background: rgba(7,8,10,.5); padding: 5px 10px; border-radius: 7px; backdrop-filter: blur(4px); }

.ap-body { background: var(--bg); padding: 0 0 30px; }
.ap-layout { max-width: 880px; margin: 0 auto; padding: 0 32px; display: grid; grid-template-columns: 200px 1fr; gap: 50px; align-items: start; }
.ap-toc { position: sticky; top: 104px; }
.ap-toc h5 { font-family: var(--mono); font-size: .68rem; letter-spacing: .2em; text-transform: uppercase; color: var(--dim); margin-bottom: 14px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.ap-toc a { display: block; font-size: .86rem; color: var(--dim); padding: 7px 0 7px 14px; border-left: 2px solid var(--line); transition: all .22s var(--ease); line-height: 1.35; }
.ap-toc a:hover { color: var(--muted); }
.ap-toc a.on { color: var(--text); border-left-color: var(--pac); }

.ap-article { min-width: 0; font-size: 1.13rem; line-height: 1.8; color: #cfd5dc; padding-top: 44px; }
.ap-article > p { margin-bottom: 26px; }
.ap-article > p:first-of-type { font-size: 1.3rem; line-height: 1.65; color: var(--text); font-weight: 500; margin-bottom: 30px; }
.ap-article h2 { font-size: clamp(1.45rem,2.4vw,1.9rem); font-weight: 800; letter-spacing: -.02em; color: var(--text); margin: 42px 0 18px; line-height: 1.15; scroll-margin-top: 100px; }
.ap-article h3 { font-size: 1.25rem; font-weight: 700; color: var(--text); margin: 32px 0 14px; scroll-margin-top: 100px; }
.ap-article ul, .ap-article ol { margin: 0 0 26px; padding-left: 4px; list-style: none; counter-reset: li; }
.ap-article li { position: relative; padding-left: 38px; margin-bottom: 16px; }
.ap-article ul li::before { content: ""; position: absolute; left: 6px; top: 12px; width: 9px; height: 9px; border-radius: 3px; background: var(--pac); box-shadow: 0 0 10px rgba(var(--prgb),.6); }
.ap-article ol li { counter-increment: li; }
.ap-article ol li::before { content: counter(li); position: absolute; left: 0; top: 1px; width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; font-family: var(--mono); font-size: .82rem; font-weight: 600; color: var(--pac); background: rgba(var(--prgb),.12); border: 1px solid rgba(var(--prgb),.3); }
.ap-article li b { color: var(--text); }
.ap-article blockquote { position: relative; margin: 40px 0; padding: 8px 0 8px 32px; border-left: 3px solid var(--pac); }
.ap-article blockquote p { font-size: clamp(1.3rem,2.2vw,1.7rem); font-weight: 700; line-height: 1.32; color: var(--text); letter-spacing: -.01em; margin: 0; }
.ap-article img { max-width: 100%; height: auto; border-radius: 16px; margin: 36px 0; border: 1px solid var(--line); }
.ap-article a { color: var(--pac); text-decoration: underline; text-underline-offset: 3px; }

.ap-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 40px 0 0; padding-top: 30px; border-top: 1px solid var(--line); }
.ap-tag { font-family: var(--mono); font-size: .82rem; color: var(--muted); padding: 7px 14px; border-radius: 999px; border: 1px solid var(--line-2); transition: all .2s; }
.ap-tag:hover { color: var(--text); border-color: var(--pac); }

.ap-author { max-width: 880px; margin: 50px auto 0; padding: 0 32px; }
.ap-author-card { display: flex; gap: 20px; align-items: center; padding: 26px 28px; border-radius: 16px; border: 1px solid var(--line); background: var(--panel); }
.ap-author-card .av { width: 60px; height: 60px; flex-shrink: 0; border-radius: 50%; display: grid; place-items: center; background: linear-gradient(135deg, var(--brand-2), var(--brand)); color: #fff; font-weight: 800; font-size: 1.3rem; }
.ap-author-card h4 { font-size: 1.05rem; font-weight: 700; }
.ap-author-card p { color: var(--muted); font-size: .94rem; line-height: 1.55; margin-top: 6px; }

.ap-rel { background: linear-gradient(180deg,var(--bg),var(--bg-2)); margin-top: 60px; }
.ap-rel h2 { font-size: clamp(1.6rem,2.6vw,2.2rem); margin-bottom: 30px; }

.ap-sub { position: relative; overflow: hidden; text-align: center; padding: 100px 0;
  background: radial-gradient(80% 120% at 50% 0%, rgba(255,75,38,.24), transparent 60%), linear-gradient(180deg,#14060a,#0b0507); }
.ap-sub .wrap { position: relative; z-index: 2; }
.ap-sub h2 { font-size: clamp(1.8rem,3.4vw,2.8rem); margin: 14px auto 0; max-width: 16ch; }
.ap-sub p { color: var(--muted); font-size: 1.06rem; max-width: 560px; margin: 16px auto 0; line-height: 1.6; }
.ap-form { display: flex; gap: 12px; max-width: 500px; margin: 32px auto 0; flex-wrap: wrap; justify-content: center; }
.ap-form input { flex: 1; min-width: 230px; padding: 14px 22px; border-radius: 999px; border: 1px solid var(--line-2); background: rgba(255,255,255,.05); color: var(--text); font-family: inherit; font-size: 1rem; }
.ap-form input:focus { outline: none; border-color: var(--brand); }

@media (max-width: 900px) {
  .ap-layout { grid-template-columns: 1fr; gap: 0; }
  .ap-toc { display: none; }
  .ap-article { padding-top: 30px; }
}
@media (max-width: 600px) { .ap-hero { padding: 112px 0 0; } .ap-byline .ap-share { margin-left: 0; width: 100%; } }

@media (prefers-reduced-motion: reduce) {
  .bf-term .cur, .bf-row::before { animation: none !important; }
}