/* ── SciCoproof blog — shares the landing page's design system ───────────── */
/* KaTeX_Main brand font (same source the landing page uses) */
@font-face{font-family:"KaTeX_Main";font-style:normal;font-weight:400;
  src:url("https://cdn.jsdelivr.net/npm/katex@0.16.11/dist/fonts/KaTeX_Main-Regular.woff2")format("woff2");font-display:swap}
@font-face{font-family:"KaTeX_Main";font-style:normal;font-weight:700;
  src:url("https://cdn.jsdelivr.net/npm/katex@0.16.11/dist/fonts/KaTeX_Main-Bold.woff2")format("woff2");font-display:swap}

:root{
  --bg:#faf6ee; --bg-alt:#f3ecdd; --surface:#fffdf8; --border:#e3d4b4;
  --text:#2c2416; --muted:#6f6452;
  --accent:#5576a6; --accent-dark:#3e5c85;
  --del-bg:#fbe1e1; --del-text:#b23a3a;
  --ins-bg:#dcf3dd; --ins-text:#2f7a33;
  --shadow:0 8px 24px -12px rgba(44,36,22,.25);
  --radius:16px;
  --font-serif:"Lora",Georgia,"Times New Roman",serif;
  --font-sans:"Inter",-apple-system,"Segoe UI",sans-serif;
  --mono:"SFMono-Regular",Consolas,monospace;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--bg);color:var(--text);
     line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}

.wrap{max-width:44rem;margin:0 auto;padding:0 1.5rem}
.site-main{min-height:60vh;padding-bottom:3rem}

/* ── Buttons (from landing) ──────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4em;
     font-family:var(--font-sans);font-weight:600;text-decoration:none;border-radius:999px;
     border:1px solid transparent;cursor:pointer;
     transition:transform .15s,box-shadow .15s,background-color .15s,color .15s;white-space:nowrap}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px -8px rgba(85,118,166,.6)}
.btn--primary:hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn--lg{padding:.85rem 1.7rem;font-size:1rem}
.btn--sm{padding:.5rem 1.1rem;font-size:.85rem}

/* ── Nav ─────────────────────────────────────────────────────────────────── */
/* ── SciCoagent chrome tokens (shared with the landing/Agents pages) ─────── */
:root{
  --sc-bg:#eaf2e3; --sc-card:#ffffff; --sc-border:rgba(0,0,0,.1);
  --sc-text:#006a4e; --sc-text2:#004d38; --sc-accent:#800000;
}
[data-theme="dark"]{
  --sc-bg:#111827; --sc-card:#1f2937; --sc-border:rgba(255,255,255,.1);
  --sc-text:#f9fafb; --sc-text2:#9ca3af; --sc-accent:#e08a86;
  /* warm article body — dark variant */
  --bg:#17130d; --bg-alt:#201a12; --surface:#201a12; --border:#3a3123;
  --text:#efe7d8; --muted:#b6a98f;
  --accent:#8aa9d6; --accent-dark:#a9c2e6;
  --del-bg:#3a2020; --del-text:#e2938f;
  --ins-bg:#1f3320; --ins-text:#8ece92;
}

/* ── Chrome: SciCoagent nav (Cutive Mono) wrapping the warm-paper article ── */
.sc-nav{position:sticky;top:0;z-index:100;max-width:1400px;margin:0 auto;
  background:var(--sc-bg);border-bottom:1px solid var(--sc-border);
  font-family:"Cutive Mono",monospace;transition:background-color .3s ease}
.sc-nav__inner{display:flex;align-items:center;justify-content:space-between;
  gap:1.5rem;padding:1rem 2rem}
.sc-nav__brand{display:flex;align-items:center;gap:.55rem;color:var(--sc-text);
  font-weight:700;font-size:1.05rem;text-decoration:none}
.sc-nav__brand img{height:28px;width:28px;border-radius:7px}
.sc-nav__links{display:flex;align-items:center;gap:1.5rem;font-size:.95rem}
.sc-nav__links a{color:var(--sc-text2);text-decoration:none;transition:color .2s ease}
.sc-nav__links a:hover,.sc-nav__links a[aria-current="page"]{color:var(--sc-accent)}
.sc-theme-toggle{background:var(--sc-card);border:1px solid var(--sc-border);
  color:var(--sc-text);padding:.4rem;border-radius:99px;cursor:pointer;
  display:inline-flex;align-items:center;line-height:0}

.sc-footer{border-top:1px solid var(--sc-border);background:var(--sc-bg);
  font-family:"Cutive Mono",monospace;margin-top:2.5rem;transition:background-color .3s ease}
.sc-footer__inner{max-width:1100px;margin:0 auto;padding:1.5rem;
  color:var(--sc-text2);font-size:.85rem;line-height:1.5}
.sc-footer__inner p+p{margin-top:.25rem}
.sc-footer__inner a{color:var(--sc-text)}

/* ── Brand wordmark (static; from landing) ───────────────────────────────── */
.brand-mark{display:inline-flex;align-items:center;justify-content:center;flex-wrap:wrap;
  font-family:"KaTeX_Main",var(--font-serif);font-weight:700;line-height:1;color:var(--text)}
.brand-scripts{display:inline-flex;flex-direction:column;align-items:flex-start;
  margin-left:.18em;font-size:.36em;line-height:1.35}
.brand-sup{color:#525252;font-weight:600}
.brand-sub{color:#5576a6;font-weight:600}
.brand-mark--mini{font-size:1.9rem;flex-wrap:nowrap;justify-content:flex-start}
.diff-letter{display:inline-flex;align-items:center;gap:.18em;white-space:nowrap}
.brand-mark .diff-letter{gap:0}
.del-wrap{position:relative;display:inline-block;color:#525252}
.strike-line{position:absolute;left:2%;right:2%;top:50%;height:2px;background:#d13d3d;transform:scaleX(1)}
.ins-wrap{display:inline-block;color:#6ca65d}

/* ── Blog home ───────────────────────────────────────────────────────────── */
.blog-head{padding:2.4rem 0 1.4rem;border-bottom:1px solid var(--border);margin-bottom:2rem}
.eyebrow{font-family:var(--font-sans);font-size:.75rem;font-weight:700;letter-spacing:.12em;
         text-transform:uppercase;color:var(--accent);margin-bottom:.8rem}
.blog-head h1{font-family:var(--font-serif);font-size:clamp(2rem,5vw,2.6rem);line-height:1.1;margin-bottom:.6rem}
.lead{color:var(--muted);font-size:1.1rem;max-width:36rem}

.postlist{list-style:none;display:flex;flex-direction:column;gap:1.1rem}
.postcard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
          box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s}
.postcard:hover{transform:translateY(-2px);box-shadow:0 14px 30px -14px rgba(44,36,22,.32)}
.postcard a{display:block;padding:1.5rem 1.7rem}
.postcard time{font-family:var(--font-sans);font-size:.8rem;color:var(--muted);letter-spacing:.02em}
.postcard h2{font-family:var(--font-serif);font-size:1.5rem;line-height:1.2;margin:.35rem 0 .55rem;color:var(--text)}
.postcard p{color:var(--muted);font-size:1rem;margin-bottom:.8rem}
.readmore{font-family:var(--font-sans);font-weight:600;color:var(--accent);font-size:.9rem}
.postlist__empty{color:var(--muted);font-style:italic;padding:1rem 0}

/* ── Post header ─────────────────────────────────────────────────────────── */
.post-head{padding:2.4rem 0 1.6rem}
.post-title{font-family:var(--font-serif);font-weight:700;font-size:clamp(2rem,5.5vw,3rem);
            line-height:1.08;letter-spacing:-.01em;margin:.7rem 0 .8rem;text-wrap:balance}
.post-deck{font-family:var(--font-serif);font-style:italic;font-size:1.25rem;color:var(--muted);
           line-height:1.5;margin-bottom:1.4rem;text-wrap:pretty}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem 1rem;padding-top:1.2rem;
           border-top:1px solid var(--border);font-family:var(--font-sans);font-size:.82rem;color:var(--muted)}
.tags{display:flex;flex-wrap:wrap;gap:.4rem}
.tag{background:var(--bg-alt);border:1px solid var(--border);border-radius:999px;
     padding:.15rem .65rem;font-size:.72rem;color:var(--muted)}
.reading{margin-left:auto}

/* ── Post body ───────────────────────────────────────────────────────────── */
.post-body{font-family:var(--font-serif);font-size:1.19rem;line-height:1.78;color:var(--text)}
.post-body>p:first-of-type{font-size:1.34rem}
.post-body p{margin:0 0 1.35rem;text-wrap:pretty}
.post-body h2{font-family:var(--font-serif);font-weight:700;font-size:1.7rem;line-height:1.2;
              margin:2.8rem 0 1rem;text-wrap:balance}
.post-body a{color:var(--accent);text-decoration:underline;text-underline-offset:2px;
             text-decoration-thickness:1.5px;text-decoration-color:rgba(85,118,166,.4)}
.post-body a:hover{text-decoration-color:var(--accent)}
.post-body strong{font-weight:700}
.post-body em{font-style:italic}
.post-body code{font-family:var(--mono);background:var(--bg-alt);border:1px solid var(--border);
                border-radius:5px;padding:.06em .35em;font-size:.85em}
.post-body ul{margin:1.4rem 0;list-style:none;display:flex;flex-direction:column;gap:.75rem}
.post-body ul li{position:relative;padding-left:1.6rem}
.post-body ul li::before{content:"";position:absolute;left:.2rem;top:.66em;width:.5rem;height:.5rem;
                         border-radius:50%;background:var(--accent)}
.post-body hr{border:0;height:1px;background:var(--border);margin:2.8rem 0}

/* tables */
.post-body table{border-collapse:collapse;width:100%;margin:1.8rem 0;font-family:var(--font-sans);
                 font-size:.95rem;background:var(--surface);border:1px solid var(--border);
                 border-radius:var(--radius);overflow:hidden}
.post-body thead th{text-align:left;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;
                    color:var(--muted);font-weight:700;padding:.8rem 1rem;border-bottom:1px solid var(--border)}
.post-body tbody td{padding:.75rem 1rem;border-bottom:1px solid var(--border);vertical-align:top}
.post-body tbody tr:last-child td{border-bottom:0}
.post-body td:nth-child(3){color:var(--muted)}
.post-body td code{background:transparent;border:0;padding:0}
.post-body td:nth-child(1) code{color:var(--del-text)}
.post-body td:nth-child(2) code{color:var(--ins-text);font-weight:700}

/* figures (from the render-image hook) */
.figframe{margin:2.2rem 0 .6rem;background:#fff;border:1px solid var(--border);
          border-radius:var(--radius);box-shadow:var(--shadow);padding:1rem;overflow-x:auto}
.figframe img{width:100%;height:auto}
.figframe+p{margin-top:0;text-align:center;font-family:var(--font-sans);font-size:.9rem;
            font-style:normal;color:var(--muted);max-width:38rem;margin-left:auto;margin-right:auto}
.figframe+p em{font-style:italic}

/* native KaTeX math */
.katex-display{margin:1.9rem 0;overflow-x:auto;overflow-y:hidden;padding:.4rem 0}

/* share bar (top of each post) */
.post-share{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;margin:-.4rem 0 1.4rem}
.post-cover{margin:0 0 2rem}
.post-cover img{width:100%;height:auto;border-radius:var(--radius);
  border:1px solid var(--border);box-shadow:var(--shadow);display:block}
.post-share__label{font-family:var(--font-sans);font-size:.8rem;font-weight:600;
  letter-spacing:.02em;color:var(--muted);margin-right:.15rem}
.post-share__btn{display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;padding:0;border:1px solid var(--border);border-radius:50%;
  background:var(--surface);color:var(--muted);cursor:pointer;
  transition:color .15s,border-color .15s,transform .15s}
.post-share__btn:hover{color:var(--accent);border-color:var(--accent);transform:translateY(-1px)}
.post-share__btn svg{width:16px;height:16px;fill:currentColor;display:block}
.post-share__btn.is-copied{color:var(--ins-text);border-color:var(--ins-text)}

/* CTA + back link */
.post-cta{margin:3rem 0 1.5rem;background:var(--surface);border:1px solid var(--border);
          border-radius:var(--radius);box-shadow:var(--shadow);padding:2rem;text-align:center}
.post-cta p{font-family:var(--font-serif);font-size:1.2rem;margin-bottom:1.3rem}
.post-back{display:inline-block;font-family:var(--font-sans);font-weight:600;font-size:.9rem;color:var(--accent)}
.post-back:hover{color:var(--accent-dark)}

/* ── Footer (from landing) ───────────────────────────────────────────────── */
.footer{border-top:1px solid var(--border);padding:2rem 1.5rem;margin-top:2rem}
.footer__inner{max-width:1100px;margin:0 auto;display:flex;flex-wrap:wrap;align-items:center;
               gap:1rem;justify-content:space-between}
.footer__copy{color:var(--muted);font-size:.9rem}
.footer__copy a{color:var(--accent)}

@media (max-width:600px){
  .sc-nav__inner{padding:.75rem 1.25rem;gap:1rem}
  .sc-nav__brand span{display:none}
  .sc-nav__links{gap:1.1rem}
}
@media (max-width:640px){
  .post-body{font-size:1.12rem}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto}
  .postcard:hover,.btn:hover{transform:none}
}