:root{
  --bg:#f5f4f0; --panel:#ffffff; --panel-2:#f0efe9;
  --line:rgba(20,20,18,0.12); --line-strong:rgba(20,20,18,0.2);
  --text:#161715; --dim:rgba(22,23,21,0.66); --faint:rgba(22,23,21,0.42);
  --amber:#a8631c; --amber-contrast:#ffffff;
  --display:"Sora",system-ui,sans-serif; --mono:"JetBrains Mono",ui-monospace,monospace;
  --ease:cubic-bezier(0.32,0.72,0,1);
  --r-lg:0.6rem; --r-md:0.4rem; --r-sm:3px;
}

:root[data-theme="dark"]{
  --bg:#0e0f10; --panel:#161718; --panel-2:#1b1c1e;
  --line:rgba(255,255,255,0.09); --line-strong:rgba(255,255,255,0.18);
  --text:#eeeeec; --dim:rgba(238,238,236,0.64); --faint:rgba(238,238,236,0.4);
  --amber:#e8a33d; --amber-contrast:#161005;
}

@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0e0f10; --panel:#161718; --panel-2:#1b1c1e;
    --line:rgba(255,255,255,0.09); --line-strong:rgba(255,255,255,0.18);
    --text:#eeeeec; --dim:rgba(238,238,236,0.64); --faint:rgba(238,238,236,0.4);
    --amber:#e8a33d; --amber-contrast:#161005;
  }
}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{background:var(--bg);color:var(--text);font-family:var(--display);line-height:1.6;-webkit-font-smoothing:antialiased;transition:background 0.4s var(--ease), color 0.4s var(--ease);}

.shell{display:grid;grid-template-columns:16.5rem 1fr;max-width:82rem;margin:0 auto;}

/* SIDEBAR */
.side{
  border-right:1px solid var(--line);
  padding:3rem 1.75rem 2rem;
  position:sticky;top:0;height:100vh;overflow-y:auto;
}
.side .id{font-family:var(--mono);font-size:0.7rem;color:var(--faint);text-transform:uppercase;letter-spacing:0.12em;margin-bottom:0.5rem;}
.side-name{font-family:var(--display);font-size:1.35rem;font-weight:600;margin-bottom:0.3rem;letter-spacing:-0.01em;}
.side-role{color:var(--amber);font-size:0.86rem;font-weight:500;margin-bottom:2.25rem;}

.photo{width:100%;aspect-ratio:4/5;background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;margin-bottom:2rem;}
.photo img{width:100%;height:100%;object-fit:cover;display:block;}
.photo-fallback img{display:none;}
.photo-fallback{position:relative;}
.photo-fallback::after{content:"AD";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-family:var(--display);font-size:2.5rem;font-weight:600;color:var(--faint);}

.side nav{display:flex;flex-direction:column;gap:0.5rem;font-family:var(--mono);font-size:0.8rem;margin-bottom:2.25rem;}
.side nav a{color:var(--dim);text-decoration:none;padding:0.35rem 0 0.35rem 0.75rem;border-left:2px solid transparent;transition:color 0.4s var(--ease), border-color 0.4s var(--ease);}
.side nav a:hover{color:var(--amber);border-left-color:var(--amber);}

.contact-mini{font-family:var(--mono);font-size:0.76rem;color:var(--faint);display:flex;flex-direction:column;gap:0.4rem;margin-bottom:2rem;}
.contact-mini a{color:var(--dim);text-decoration:none;transition:color 0.4s var(--ease);}
.contact-mini a:hover{color:var(--amber);}

.theme-toggle{
  display:inline-flex;align-items:center;gap:0.5rem;
  font-family:var(--mono);font-size:0.72rem;color:var(--dim);
  background:var(--panel);border:1px solid var(--line);border-radius:999px;
  padding:0.45rem 0.9rem;cursor:pointer;
  transition:border-color 0.4s var(--ease), color 0.4s var(--ease);
}
.theme-toggle:hover{border-color:var(--amber);color:var(--amber);}
.theme-toggle .ti-moon{display:none;}
:root[data-theme="dark"] .theme-toggle .ti-sun{display:none;}
:root[data-theme="dark"] .theme-toggle .ti-moon{display:inline;}

.mobile-toggle{
  display:none;position:fixed;top:1.1rem;right:1.1rem;z-index:50;
  width:2.6rem;height:2.6rem;border-radius:50%;
  background:var(--panel);border:1px solid var(--line);
  flex-direction:column;justify-content:center;gap:5px;cursor:pointer;
}
.mobile-toggle span{display:block;width:16px;height:1.5px;background:var(--text);margin:0 auto;transition:transform 0.4s var(--ease), opacity 0.3s var(--ease);}
.mobile-toggle.open span:first-child{transform:translateY(3.25px) rotate(45deg);}
.mobile-toggle.open span:last-child{transform:translateY(-3.25px) rotate(-45deg);}

/* MAIN */
.main{padding:3rem 3rem 6rem;min-width:0;}

.section-label{
  font-family:var(--mono);font-size:0.74rem;text-transform:uppercase;letter-spacing:0.14em;
  color:var(--faint);margin:2.75rem 0 0.9rem;
}
.section-label:first-child{margin-top:0;}

.block{
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--panel);margin-bottom:1.15rem;overflow:hidden;
  transition:border-color 0.5s var(--ease);
}
.block:hover{border-color:var(--line-strong);}
.block-head{
  display:flex;align-items:center;gap:0.6rem;
  padding:0.65rem 1.1rem;border-bottom:1px solid var(--line);
  font-family:var(--mono);font-size:0.7rem;color:var(--faint);
  text-transform:uppercase;letter-spacing:0.08em;
}
.dot{width:6px;height:6px;border-radius:50%;background:var(--amber);flex-shrink:0;}
.block-body{padding:1.5rem 1.1rem;}
.block-body h2,.block-body h3,.block-body h4{font-weight:600;letter-spacing:-0.01em;}
.block-body h3{font-size:1.08rem;margin-bottom:0.7rem;}
.block-body p{color:var(--dim);font-size:0.93rem;line-height:1.65;}
.hero-h{font-size:1.5rem;line-height:1.25;margin-bottom:0.85rem;}

.hero-actions{display:flex;gap:0.75rem;flex-wrap:wrap;margin-top:1.4rem;}
.btn{
  display:inline-flex;align-items:center;text-decoration:none;
  font-size:0.86rem;font-weight:500;border-radius:999px;padding:0.7rem 1.3rem;
  transition:transform 0.4s var(--ease), opacity 0.4s var(--ease), border-color 0.4s var(--ease);
}
.btn:active{transform:scale(0.98);}
.btn-primary{background:var(--amber);color:var(--amber-contrast);}
.btn-primary:hover{transform:translateY(-2px);opacity:0.92;}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line-strong);}
.btn-ghost:hover{border-color:var(--amber);color:var(--amber);}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:1.15rem;margin-bottom:1.15rem;}

.note-link{
  display:inline-block;font-family:var(--mono);font-size:0.8rem;color:var(--amber);
  text-decoration:none;margin-top:1.1rem;transition:opacity 0.4s var(--ease);
}
.note-link:hover{opacity:0.75;}

.scope-note{
  font-family:var(--mono);font-size:0.78rem;color:var(--faint);
  margin-top:1rem;padding-top:0.9rem;border-top:1px dashed var(--line);
}

.tags{display:flex;flex-wrap:wrap;gap:0.5rem;margin-top:1.2rem;}
.tags span{
  font-family:var(--mono);font-size:0.7rem;
  background:rgba(255,255,255,0.04);border:1px solid var(--line);
  border-radius:var(--r-sm);padding:0.28rem 0.6rem;color:var(--dim);
}

/* LOG (timeline) */
.log{padding:0;}
.log-row{
  display:flex;gap:1.3rem;padding:1.05rem 1.1rem;
  border-bottom:1px solid var(--line);align-items:baseline;
}
.log-row:last-child{border-bottom:none;}
.log-date{
  font-family:var(--mono);font-size:0.7rem;color:var(--amber);
  white-space:nowrap;width:6.5rem;flex-shrink:0;padding-top:0.15rem;
}
.log-row h4{font-size:0.95rem;margin-bottom:0.3rem;}
.log-row p{font-size:0.86rem;color:var(--dim);max-width:52ch;}

/* CONTACT */
.contact-intro{margin-bottom:1.3rem;}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0.85rem;}
.contact-item{
  display:flex;flex-direction:column;gap:0.3rem;
  background:var(--panel-2);border:1px solid var(--line);
  border-radius:var(--r-md);padding:1.05rem;text-decoration:none;
  transition:transform 0.4s var(--ease), border-color 0.4s var(--ease);
}
.contact-item:hover{transform:translateY(-2px);border-color:var(--amber);}
.contact-item-static:hover{transform:none;border-color:var(--line);}
.contact-label{font-family:var(--mono);font-size:0.64rem;text-transform:uppercase;letter-spacing:0.1em;color:var(--faint);}
.contact-value{color:var(--text);font-size:0.88rem;font-weight:500;}

.footer{
  margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;color:var(--faint);font-family:var(--mono);font-size:0.75rem;
}

/* REVEAL */
.reveal{opacity:0;transform:translateY(1.75rem);transition:opacity 0.7s var(--ease), transform 0.7s var(--ease);}
.reveal.in{opacity:1;transform:translateY(0);}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* RESPONSIVE */
@media (max-width:900px){
  .mobile-toggle{display:flex;}
  .shell{grid-template-columns:1fr;}
  .side{
    position:fixed;inset:0;height:100dvh;width:100%;z-index:45;
    background:var(--bg);border-right:none;
    display:flex;flex-direction:column;justify-content:center;
    transform:translateY(-100%);opacity:0;pointer-events:none;
    transition:transform 0.5s var(--ease), opacity 0.5s var(--ease);
    padding:2rem;
  }
  .side.open{transform:translateY(0);opacity:1;pointer-events:auto;}
  .photo{max-width:11rem;margin:0 auto 2rem;}
  .side nav{align-items:center;text-align:center;}
  .side .id, .side-name, .side-role{text-align:center;}
  .contact-mini{align-items:center;text-align:center;}
  .main{padding:5rem 1.25rem 4rem;}
  .grid2{grid-template-columns:1fr;}
  .log-row{flex-direction:column;gap:0.4rem;}
  .contact-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:520px){
  .contact-grid{grid-template-columns:1fr;}
  .main{padding:5rem 1rem 3.5rem;}
}

/* NOTE PAGE (agent-infrastructure.html) */
.note-page{max-width:44rem;margin:0 auto;padding:4.5rem 1.5rem 6rem;}
.back-link{
  display:inline-block;font-family:var(--mono);font-size:0.8rem;color:var(--dim);
  text-decoration:none;margin-bottom:2.5rem;transition:color 0.4s var(--ease);
}
.back-link:hover{color:var(--amber);}
.note-page > .id{margin-bottom:1rem;}
.note-h1{
  font-family:var(--display);font-weight:700;
  font-size:clamp(1.9rem,5vw,2.6rem);line-height:1.12;
  letter-spacing:-0.015em;margin-bottom:1.1rem;max-width:16ch;
}
.note-lede{color:var(--dim);font-size:1.05rem;max-width:56ch;}
.note-lede strong{color:var(--text);font-weight:600;}

.note-section{margin-top:4rem;}
.note-h2{
  font-family:var(--mono);font-weight:600;font-size:0.76rem;
  letter-spacing:0.08em;text-transform:uppercase;color:var(--faint);
  margin:0 0 1.6rem;padding-bottom:0.8rem;border-bottom:1px solid var(--line);
}
.note-h2 span{color:var(--text);}
.note-tight{color:var(--dim);font-size:0.96rem;max-width:64ch;}

.diagram-frame{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  padding:1.6rem 1.1rem 1.1rem;color:var(--text);
}
.diagram-frame svg text{font-family:var(--mono);}
.node-label{font-size:12.5px;}
.node-sub{font-size:10.5px;}
.edge-label{font-size:10.5px;}
.note-figcaption{font-size:0.82rem;color:var(--faint);margin-top:0.9rem;max-width:62ch;}

.tier-stack{display:flex;flex-direction:column;gap:0.6rem;}
.tier{
  display:flex;align-items:center;gap:0.9rem;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  padding:0.85rem 1rem;
}
.tier-index{font-family:var(--mono);font-size:0.68rem;color:var(--faint);width:1.9rem;flex-shrink:0;}
.tier-name{font-weight:600;font-size:0.9rem;}
.tier-role{color:var(--dim);font-size:0.84rem;}
.tier-agents{border-left:2px solid var(--amber);}
.tier-gate{border-left:2px solid var(--text);}

.agent-row{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(9.4rem,1fr));
  gap:0.5rem;margin-top:0.6rem;
}
.agent-chip{
  background:var(--panel-2);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:0.5rem 0.65rem;font-size:0.77rem;font-family:var(--mono);color:var(--dim);
}

.math-row{
  display:grid;grid-template-columns:1fr auto 1fr;gap:1.1rem;align-items:center;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  padding:1.6rem 1.35rem;
}
.math-cell{text-align:center;}
.math-num{font-family:var(--mono);font-weight:700;font-size:2rem;color:var(--text);}
.math-emph .math-num{color:var(--amber);}
.math-caption{font-size:0.74rem;color:var(--faint);margin-top:0.25rem;}
.math-op{font-family:var(--mono);font-size:1.2rem;color:var(--faint);}

.note-caveat{
  margin-top:1.1rem;padding:0.9rem 1rem;
  background:var(--panel-2);border-left:2px solid var(--amber);border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:0.87rem;color:var(--text);
}
.note-caveat strong{color:var(--amber);}

.note-footer{
  margin-top:4rem;padding-top:1.5rem;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:0.75rem;
  font-family:var(--mono);font-size:0.75rem;color:var(--faint);
}
.note-footer span:first-child{color:var(--dim);}

@media (max-width:520px){
  .math-row{grid-template-columns:1fr;}
  .math-op{transform:rotate(90deg);}
}