/* ==========================================================================
   blog-light.css — Infinite Soldier Technologies blog reading system
   "Light · Blueprint × Deep Field" — reskin layer for blog.html + blog/*.html
   Loads AFTER ist.css. Reuses ist.css tokens, nav, footer, .plate, .btn, ∞.
   Styles ONLY blog-specific bits: hero, editorial plates, prose, capture,
   read-next. No new fonts, no color system beyond ist.css tokens.
   ========================================================================== */

/* scroll reveal (matches reveal.js which toggles .in) */
.rv{opacity:0;transform:translateY(10px);transition:opacity .5s ease,transform .5s ease}
.rv.in{opacity:1;transform:none}

/* narrow reading measure */
.wrap-narrow{position:relative;z-index:2;max-width:720px;margin:0 auto;padding:0 30px}

/* gradient text helper (blog markup uses .grad) */
.grad{background:var(--grad-bright);-webkit-background-clip:text;background-clip:text;color:transparent}

/* section rhythm */
section{position:relative;z-index:2}

/* ---------- category tags / meta ---------- */
.cat-tag{display:inline-flex;align-items:center;font-family:'IBM Plex Mono',monospace;font-size:10px;
  letter-spacing:.12em;text-transform:uppercase;color:var(--accent-ink);
  border:1px solid var(--grid);border-radius:2px;padding:5px 10px;background:var(--card)}
.cat-tag.teal{color:var(--accent-teal)}
.cat-tag.gold{color:var(--blue-2)}
.toprow{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.meta{display:flex;align-items:center;gap:10px;font-family:'IBM Plex Mono',monospace;
  font-size:11px;letter-spacing:.06em;color:var(--slate)}
.meta .dot{width:3px;height:3px;border-radius:50%;background:var(--slate);opacity:.6}
.meta .by{color:var(--ink-soft)}

/* ---------- blog index hero ---------- */
.blog-hero{position:relative;padding:56px 0 20px;overflow:hidden}
.blog-hero .eyebrow{display:inline-flex;align-items:center;font-family:'IBM Plex Mono',monospace;
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--slate);margin-bottom:20px}
.blog-hero h1{font-size:52px;letter-spacing:-.02em;max-width:16ch}
.blog-hero .dek{margin-top:22px;font-size:18px;color:var(--ink-soft);max-width:56ch;line-height:1.55}
.blog-inf{position:absolute;right:-20px;top:-30px;font-family:'Fraunces',serif;font-weight:600;
  font-size:280px;line-height:1;pointer-events:none;user-select:none;z-index:1;
  background:var(--grad-bright);-webkit-background-clip:text;background-clip:text;color:transparent;opacity:.10}

/* ---------- featured post plate ---------- */
.feat-wrap{padding:20px 0 0}
.feat-post{position:relative;background:var(--card);border:1px solid var(--grid);border-radius:3px;
  display:grid;grid-template-columns:1.05fr 1fr;overflow:hidden;box-shadow:var(--shadow)}
.feat-art{position:relative;min-height:300px;background:radial-gradient(120% 140% at 12% 0%,#16203A 0%,var(--night) 62%);overflow:hidden;display:flex;align-items:center;justify-content:center}
.feat-art .fx-grid{position:absolute;inset:0;opacity:.28;
  background-image:linear-gradient(rgba(174,190,224,.45) 1px,transparent 1px),linear-gradient(90deg,rgba(174,190,224,.45) 1px,transparent 1px);
  background-size:30px 30px;-webkit-mask-image:radial-gradient(90% 90% at 50% 40%,#000,transparent 78%);mask-image:radial-gradient(90% 90% at 50% 40%,#000,transparent 78%)}
.feat-art .fx-inf{position:relative;z-index:2;font-family:'Fraunces',serif;font-weight:600;font-size:150px;line-height:1;
  background:var(--grad-bright);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 8px 26px rgba(129,140,248,.4))}
.feat-art .fx-badge{position:absolute;bottom:16px;left:16px;z-index:2;font-family:'IBM Plex Mono',monospace;
  font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:#CBD8F2;background:rgba(11,16,32,.55);
  border:1px solid #1E294A;padding:5px 10px;border-radius:2px}
.feat-body{padding:34px 34px 32px;display:flex;flex-direction:column;gap:14px}
.feat-body h2{font-size:30px;line-height:1.08;letter-spacing:-.01em}
.feat-body h2 a{color:var(--ink)}
.feat-body .fdek{font-size:15.5px;color:var(--ink-soft);line-height:1.6}
.feat-body .go{margin-top:auto;font-size:14px;font-weight:600;color:var(--ink);display:inline-flex;align-items:center;gap:7px;width:max-content;position:relative}
.feat-body .go::after{content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;background:var(--grad-bright);transition:width .28s ease}
.feat-post:hover .feat-body .go::after{width:100%}

/* ---------- post grid cards (plates) ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pgcard{position:relative;background:var(--card);border:1px solid var(--grid);border-radius:3px;
  overflow:hidden;display:flex;flex-direction:column;transition:transform .25s ease,box-shadow .3s ease}
.pgcard:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.pgcard .stretch{position:absolute;inset:0;z-index:4}
.pg-art{position:relative;aspect-ratio:16/9;background:radial-gradient(120% 140% at 15% 0%,#16203A 0%,var(--night) 64%);
  border-bottom:1px solid var(--grid);overflow:hidden;display:flex;align-items:center;justify-content:center}
.pg-grid{position:absolute;inset:0;opacity:.26;
  background-image:linear-gradient(rgba(174,190,224,.4) 1px,transparent 1px),linear-gradient(90deg,rgba(174,190,224,.4) 1px,transparent 1px);
  background-size:26px 26px;-webkit-mask-image:radial-gradient(90% 90% at 50% 40%,#000,transparent 80%);mask-image:radial-gradient(90% 90% at 50% 40%,#000,transparent 80%)}
.pg-glow{position:absolute;width:120px;height:120px;border-radius:50%;
  background:radial-gradient(circle,rgba(var(--accent-rgb,129,140,248),.55) 0%,transparent 70%);filter:blur(6px);opacity:.5}
.pg-ico{position:relative;z-index:2;width:46px;height:46px;fill:none;stroke:#E9EEFB;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.pg-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.pg-body h3{font-size:19px;line-height:1.14}
.pg-body h3 a{color:var(--ink);position:relative;z-index:5}
.pg-body .pdek{font-size:13.5px;color:var(--ink-soft);line-height:1.55}
.pg-body .meta{margin-top:2px}
.pg-body .go{margin-top:auto;padding-top:8px;font-size:13px;font-weight:600;color:var(--ink);display:inline-flex;align-items:center;gap:6px;width:max-content;position:relative}
.pg-body .go::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--grad-bright);transition:width .28s ease}
.pgcard:hover .pg-body .go::after{width:100%}

/* ---------- article (single post) ---------- */
.article-hero{padding:44px 0 10px;position:relative}
.article-hero .crumb{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.08em;
  color:var(--slate);margin-bottom:18px}
.article-hero .crumb a{color:var(--accent-ink)}
.article-hero .crumb a:hover{text-decoration:underline}
.article-hero .crumb .sep{margin:0 8px;opacity:.5}
.article-hero .toprow{margin-bottom:16px}
.article-hero h1{font-size:46px;line-height:1.06;letter-spacing:-.02em;max-width:20ch}
.article-hero .dek{margin-top:20px;font-size:19px;color:var(--ink-soft);line-height:1.55;max-width:60ch;
  font-family:'Fraunces',Georgia,serif;font-weight:400;font-style:italic}
.article-hero .meta{margin-top:22px;padding-top:20px;border-top:1px solid var(--grid)}

/* prose body */
.article{padding:20px 0 20px}
.prose{max-width:100%}
.prose > *{max-width:65ch}
.prose p{font-size:17.5px;line-height:1.72;color:var(--ink-soft);margin:0 0 22px}
.prose p strong{color:var(--ink);font-weight:600}
.prose p em{font-style:italic}
.prose a{color:var(--accent-ink);border-bottom:1px solid rgba(67,56,202,.35);transition:border-color .2s ease}
.prose a:hover{border-color:var(--accent-ink)}
.prose h2{font-size:30px;line-height:1.12;letter-spacing:-.01em;color:var(--ink);margin:44px 0 16px}
.prose h3{font-size:23px;line-height:1.16;color:var(--ink);margin:34px 0 12px}
.prose ul,.prose ol{margin:0 0 22px;padding-left:22px}
.prose li{font-size:17.5px;line-height:1.7;color:var(--ink-soft);margin-bottom:10px}
.prose li strong{color:var(--ink);font-weight:600}

/* pull quote */
.pquote{max-width:100%;margin:34px 0;padding:26px 30px;position:relative;
  background:radial-gradient(120% 160% at 10% 0%,#16203A 0%,var(--night) 64%);
  border:1px solid #1E294A;border-radius:4px;color:#EAF0FF;box-shadow:0 22px 50px -30px rgba(11,16,32,.7)}
.pquote .pq-mark{display:block;font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.18em;
  text-transform:uppercase;color:#8CA0C8;margin-bottom:10px}
.pquote p{font-family:'Fraunces',Georgia,serif;font-weight:400;font-size:23px;line-height:1.32;color:#F2F5FF;margin:0}

/* callout + key takeaways (blueprint plate) */
.callout,.keytakes{max-width:100%;margin:32px 0;padding:24px 28px;background:var(--paper-2);
  border:1px solid var(--grid);border-left:3px solid var(--accent-ink);border-radius:3px}
.callout .clabel,.keytakes .clabel{display:block;font-family:'IBM Plex Mono',monospace;font-size:10px;
  letter-spacing:.16em;text-transform:uppercase;color:var(--accent-ink);margin-bottom:10px}
.callout p{font-size:16px;line-height:1.62;color:var(--ink-soft);margin:0}
.callout p strong{color:var(--ink)}
.keytakes ul{margin:0;padding-left:20px}
.keytakes li{font-size:16px;line-height:1.6;color:var(--ink-soft);margin-bottom:12px}
.keytakes li:last-child{margin-bottom:0}
.keytakes li strong{color:var(--ink)}

/* ∞ divider */
.inf-div{display:flex;align-items:center;justify-content:center;gap:16px;margin:40px 0;max-width:65ch}
.inf-div::before,.inf-div::after{content:"";height:1px;flex:1;background:var(--grid)}
.inf-div span{font-family:'Fraunces',serif;font-weight:600;font-size:26px;line-height:1;
  background:var(--grad-bright);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- email capture ---------- */
.capture{position:relative;background:var(--card);border:1px solid var(--grid);border-radius:4px;overflow:hidden;
  box-shadow:var(--shadow)}
.capture::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--grid-soft) 1px,transparent 1px),linear-gradient(90deg,var(--grid-soft) 1px,transparent 1px);
  background-size:32px 32px;-webkit-mask-image:radial-gradient(100% 120% at 50% 0,#000,transparent 72%);mask-image:radial-gradient(100% 120% at 50% 0,#000,transparent 72%);opacity:.7}
.cap-inner{position:relative;z-index:2;padding:36px 34px}
.cap-live .clabel{display:block;font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--accent-ink);margin-bottom:12px}
.cap-live h3{font-size:26px;line-height:1.12;letter-spacing:-.01em;color:var(--ink);max-width:24ch}
.cap-sub{margin-top:12px;font-size:15px;color:var(--ink-soft);line-height:1.55;max-width:56ch}
.cap-form{margin-top:20px;display:flex;gap:10px;flex-wrap:wrap;max-width:520px}
.cap-form input{flex:1;min-width:200px;background:var(--paper);border:1px solid var(--grid);border-radius:3px;
  padding:13px 14px;font-family:'Inter',sans-serif;font-size:14.5px;color:var(--ink);outline:none;transition:border-color .2s ease}
.cap-form input::placeholder{color:var(--slate)}
.cap-form input:focus{border-color:var(--accent-ink)}
.cap-form input.err{border-color:#b42318}
.cap-form button{background:var(--grad-deep);color:#fff;border:1px solid transparent;border-radius:3px;
  padding:13px 22px;font-family:'Inter',sans-serif;font-weight:600;font-size:14.5px;cursor:pointer;white-space:nowrap;
  box-shadow:0 1px 0 rgba(255,255,255,.18) inset,0 12px 26px -12px rgba(67,56,202,.6);transition:transform .18s ease,box-shadow .2s ease}
.cap-form button:hover{transform:translateY(-1px)}
.cap-form button:disabled{opacity:.7;cursor:default;transform:none}
.cap-msg{margin-top:10px;font-size:13px;color:var(--slate);min-height:1em}
.cap-msg.err{color:#b42318}
.cap-note{margin-top:12px;font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.06em;color:var(--slate)}
.cap-success{display:none;align-items:center;gap:16px;padding:36px 34px}
.cap-success.show{display:flex}
.cap-success .ck{flex:none;width:44px;height:44px;border-radius:50%;background:var(--grad-deep);display:flex;align-items:center;justify-content:center}
.cap-success .ck svg{width:22px;height:22px;fill:none;stroke:#fff;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.cap-success b{display:block;font-family:'Fraunces',serif;font-weight:500;font-size:19px;color:var(--ink);margin-bottom:2px}
.cap-success span{font-size:14px;color:var(--ink-soft)}

/* ---------- read next ---------- */
.readnext{border-top:1px solid var(--grid);padding-top:28px}
.readnext .rlabel{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--slate);margin-bottom:16px}
.rn-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.rncard{position:relative;background:var(--card);border:1px solid var(--grid);border-radius:3px;
  padding:22px 22px;display:flex;flex-direction:column;gap:8px;transition:transform .25s ease,box-shadow .3s ease}
.rncard:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.rncard .rc-cat{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--accent-ink)}
.rncard h4{font-family:'Fraunces',serif;font-weight:500;font-size:18px;line-height:1.16;color:var(--ink)}
.rncard .rc-go{margin-top:auto;font-size:13px;font-weight:600;color:var(--ink)}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .feat-post{grid-template-columns:1fr}
  .feat-art{min-height:220px}
  .post-grid{grid-template-columns:1fr;gap:18px}
}
@media (max-width:720px){
  .blog-hero h1{font-size:40px}
  .article-hero h1{font-size:34px}
  .rn-grid{grid-template-columns:1fr}
  .blog-inf{font-size:180px}
}
@media (max-width:480px){
  .wrap-narrow{padding:0 18px}
  .blog-hero{padding:38px 0 12px}
  .blog-hero h1{font-size:32px}
  .blog-hero .dek{font-size:16px}
  .article-hero h1{font-size:29px}
  .article-hero .dek{font-size:17px}
  .prose p,.prose li{font-size:16.5px}
  .prose h2{font-size:25px}
  .feat-body{padding:24px 22px}
  .cap-inner{padding:26px 20px}
  .cap-form button{flex:1}
  .pquote{padding:22px 20px}
  .pquote p{font-size:20px}
}
@media (prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;transition:none}
}