/* TestRobin — Architecture page.
   The .pd-* system is a 1:1 replication of 9robots-site/next/app/globals.css
   (exact sizes/widths), shared with the GlassHood architecture page. Page-only
   additions (scope-line, impl-grid, code, can-cannot, detail-block, page-title)
   follow the same 9robots type scale: body text 19px, headings 22px, logo 64px,
   text column max-width 800–880px. */
:root{
  --blue:#0c41cd; --navy:#000055; --orange:#e75a1e;
  --bg:#ffffff; --card:#f7f8fa; --text:#1a1a2e; --sub:#555555;
  --muted:#f0f1f4; --border:#e0e2e8; --max:1320px;
}
*{box-sizing:border-box}
html{overflow-y:scroll}
body{margin:0;padding:0;background:var(--bg);color:var(--text);
  font-family:"Lato",sans-serif;font-size:16px;line-height:1.6;font-weight:400;-webkit-font-smoothing:antialiased}
a{color:var(--navy);text-decoration:none}
a:hover{text-decoration:underline}
p{margin:0 0 1em}
.container{max-width:var(--max);margin:0 auto;padding:24px}

/* Button — 9robots .button */
a.button{display:inline-block;padding:12px 20px;border-radius:12px;border:1px solid rgba(0,0,0,.12);
  background:transparent;color:var(--sub);font-weight:500;font-family:inherit;font-size:19px;cursor:pointer;
  transition:border-color .15s ease,color .15s ease,background .15s ease,box-shadow .15s ease}
a.button:hover{background:var(--orange);border-color:var(--orange);color:#fff;
  box-shadow:0 4px 16px rgba(0,0,0,.12);text-decoration:none}
a.button:focus{outline:none}
a.button:focus-visible{outline:2px solid var(--navy);outline-offset:2px}

/* Product-detail page system (.pd-*) — exact 9robots values */
.pd-page{color:var(--text)}
.pd-header{display:block;margin-bottom:16px}
.pd-logo-link{display:inline-block;text-decoration:none}
.pd-logo{height:64px;width:auto;object-fit:contain;display:block}
.pd-page-title{font-size:22px;font-weight:700;color:var(--navy);margin:14px 0 0;letter-spacing:-.01em}

.pd-hero{font-size:22px;font-weight:400;line-height:1.35;color:var(--text);max-width:880px;margin:20px 0 14px;letter-spacing:-.005em}
.pd-hero .accent{color:var(--text)}
.scope-line{font-size:19px;line-height:1.55;color:var(--sub);max-width:880px;margin:0 0 28px}

/* Architecture visual (in the Implementation reveal) */
.hero-diagram{margin:18px 0 24px}
.hero-diagram img{display:block;width:100%;height:auto;max-width:880px;margin:0 auto}
.hero-diagram svg{display:block;width:100%;height:auto;max-width:880px;margin:0 auto}
.diagram-caption{font-size:19px;line-height:1.5;color:var(--sub);max-width:880px;margin:12px auto 0;text-align:center}

/* Overview card grid — 2x2 (1-col mobile), exact 9robots */
.pd-cards{display:grid;grid-template-columns:1fr;gap:14px;margin-bottom:24px}
@media(min-width:768px){.pd-cards{grid-template-columns:repeat(2,1fr);gap:20px}}
.pd-card,.pd-card *{text-decoration:none!important}
.pd-card{position:relative;overflow:hidden;display:flex;gap:18px;padding:24px;background:#fff;
  border:1px solid var(--border);border-radius:12px;color:inherit;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.pd-card:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,.06);border-color:var(--orange)}
.pd-card-icon{flex:0 0 auto;width:52px;height:52px;border-radius:12px;background:rgba(0,0,85,.06);
  color:var(--blue);display:flex;align-items:center;justify-content:center;transition:transform .18s ease}
.pd-card:hover .pd-card-icon{transform:scale(1.05)}
.pd-card-body{flex:1;min-width:0}
.pd-card-title{font-size:22px;font-weight:700;margin:0 0 10px;color:var(--text);letter-spacing:-.01em}
.pd-card-summary{font-size:19px;line-height:1.5;color:var(--sub);margin:0}
.pd-card-summary::after{content:"Click to read the section →";display:block;margin-top:14px;
  font-size:19px;font-weight:500;color:rgba(0,0,0,.25);transition:opacity .15s ease}
.pd-card:hover .pd-card-summary::after{opacity:0}
.pd-card-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  opacity:0;transition:opacity .18s ease;pointer-events:none;border-radius:inherit}
.pd-card:hover .pd-card-overlay{opacity:1}
.pd-card-overlay-text{display:inline-flex;align-items:center;gap:8px;background:var(--orange);color:#fff;
  padding:10px 14px;border-radius:12px;font-size:19px;font-weight:500;box-shadow:0 4px 16px rgba(0,0,0,.12);white-space:nowrap}

/* Quiet live-view line */
.live-view-note{font-size:19px;line-height:1.55;color:var(--sub);max-width:880px;margin:22px 0 0}

/* Progressive disclosure */
.pd-hidden-until-reveal{display:none}
.pd-page.revealed .pd-hidden-until-reveal{display:block}

/* Detail sections — exact 9robots */
.pd-section{padding:36px 0;border-top:1px solid rgba(0,0,0,.06);scroll-margin-top:24px}
.pd-section:first-of-type{border-top:none;padding-top:16px}
.pd-section h2{font-size:22px;font-weight:700;color:var(--blue);margin:0 0 18px;letter-spacing:-.01em}
.pd-section p{font-size:19px;line-height:1.55;color:var(--sub);max-width:800px;margin:0 0 16px}

/* Lists */
ul.tight{margin:0 0 16px;padding-left:24px;max-width:800px}
ul.tight li{font-size:19px;line-height:1.55;color:var(--sub);margin:8px 0}

/* In-reveal note */
.note{font-size:19px;line-height:1.55;color:var(--sub);max-width:800px;margin:8px 0 16px;padding:16px 20px;
  background:var(--muted);border-radius:8px}

/* Code block (sanitized config) — monospace */
.code-label{font-size:19px;font-weight:700;color:var(--navy);margin:18px 0 6px}
pre.code{background:#f4f6fa;border-left:3px solid var(--blue);border-radius:4px;padding:18px 20px;
  font-size:16px;line-height:1.55;font-family:ui-monospace,"SF Mono",Menlo,Monaco,Consolas,monospace;
  color:#1a1a2e;overflow-x:auto;margin:8px 0;max-width:880px;white-space:pre}

/* CAN / CANNOT threat model */
.can-cannot{display:grid;grid-template-columns:1fr;gap:14px;margin:10px 0 18px;max-width:880px}
@media(min-width:720px){.can-cannot{grid-template-columns:1fr 1fr}}
.cc-col{padding:20px 22px;border-radius:8px;font-size:19px;line-height:1.55}
.cc-can{background:rgba(12,65,205,.06);border:1px solid rgba(12,65,205,.18)}
.cc-cannot{background:rgba(231,90,30,.06);border:1px solid rgba(231,90,30,.2)}
.cc-col h4{margin:0 0 10px;font-size:16px;font-weight:700;letter-spacing:.04em;text-transform:uppercase}
.cc-can h4{color:var(--blue)}
.cc-cannot h4{color:var(--orange)}
.cc-col ul{margin:0;padding-left:22px}
.cc-col li{margin:7px 0;color:var(--text)}

/* Implementation-detail bindings grid */
.impl-grid{display:grid;grid-template-columns:1fr;gap:12px;margin:14px 0 18px;max-width:800px}
@media(min-width:680px){.impl-grid{grid-template-columns:1fr 1fr}}
.impl-item{display:flex;gap:16px;padding:14px 18px;background:rgba(0,0,0,.025);border-radius:6px;font-size:19px;line-height:1.55}
.impl-item>strong{flex:0 0 130px;color:var(--navy)}

/* Collapsible "detail" block */
details.detail-block{margin:16px 0;border:1px solid var(--border);border-radius:8px;background:#fff;max-width:880px}
details.detail-block>summary{cursor:pointer;padding:16px 20px;font-size:19px;font-weight:700;color:var(--navy);list-style:none}
details.detail-block>summary::-webkit-details-marker{display:none}
details.detail-block>summary::before{content:"\25B8\00a0";color:var(--orange)}
details.detail-block[open]>summary::before{content:"\25BE\00a0"}
details.detail-block>div{padding:0 20px 20px}

footer{margin:48px 0 36px;padding-top:20px;border-top:1px solid var(--border);font-size:17px;line-height:1.55;color:var(--sub);max-width:880px}

@media(max-width:768px){.container{padding:16px}.pd-logo{height:52px}}