/* Ember Compute — shared styles */
:root{
  color-scheme:dark;
  --bg:#0E0C0A; --bg-2:#161210; --bg-3:#1E1915;
  --ink:#F4EEE6; --ink-2:#CDC3B8; --ink-3:#978B7E;
  --rule:#2E2721; --rule-2:#3D342C;
  --ember:#FF7A2F; --ember-2:#FFA34D; --ember-ink:#FFB070; --ember-soft:rgba(255,122,47,.12);
  --glow:rgba(255,122,47,.22);
  --card:#141110;
  --radius:12px; --max:1120px;
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    color-scheme:light;
    --bg:#FBF8F3; --bg-2:#F2EDE5; --bg-3:#E9E2D8;
    --ink:#1A1512; --ink-2:#4A403A; --ink-3:#7B6F66;
    --rule:#E2D9CE; --rule-2:#CFC4B7;
    --ember:#D8571A; --ember-2:#B8460F; --ember-ink:#A63F0D; --ember-soft:rgba(216,87,26,.10);
    --glow:rgba(216,87,26,.16);
    --card:#FFFFFF;
  }
}
:root[data-theme="light"]{
  color-scheme:light;
  --bg:#FBF8F3; --bg-2:#F2EDE5; --bg-3:#E9E2D8;
  --ink:#1A1512; --ink-2:#4A403A; --ink-3:#7B6F66;
  --rule:#E2D9CE; --rule-2:#CFC4B7;
  --ember:#D8571A; --ember-2:#B8460F; --ember-ink:#A63F0D; --ember-soft:rgba(216,87,26,.10);
  --glow:rgba(216,87,26,.16);
  --card:#FFFFFF;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Instrument Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%}
a{color:var(--ember-ink);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--ember-2)}
:focus-visible{outline:2px solid var(--ember);outline-offset:3px}
.wrap{max-width:var(--max);margin:0 auto;padding-inline:20px}
@media (max-width:600px){.wrap{padding-inline:16px}}
h1,h2,h3,h4{margin:0;line-height:1.1;letter-spacing:-.015em;text-wrap:balance;font-weight:600}
h1{font-size:clamp(2.3rem,5.5vw,4rem);letter-spacing:-.025em}
h2{font-size:clamp(1.6rem,3vw,2.3rem)}
h3{font-size:1.2rem}
p{margin:0}
.mono{font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums}
.eyebrow{font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--ember-ink)}
.muted{color:var(--ink-2)}
.small{font-size:.92rem}
.note{font-size:.88rem;color:var(--ink-3);margin-top:12px}

/* header */
.site-head{border-bottom:1px solid var(--rule);background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);position:sticky;top:0;z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:16px;flex-wrap:wrap}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:1.1rem;letter-spacing:-.01em;color:var(--ink);text-decoration:none}
.brand:hover{color:var(--ink)}
.brand svg{width:28px;height:28px;flex:none}
.nav nav{display:flex;gap:22px;flex-wrap:wrap;font-size:.95rem;font-weight:500}
.nav nav a{color:var(--ink-2);text-decoration:none}
.nav nav a:hover,.nav nav a[aria-current]{color:var(--ink)}

/* hero */
.hero{position:relative;padding-block:clamp(56px,9vw,112px) clamp(48px,7vw,88px);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(55% 60% at 78% 0%,var(--glow),transparent 70%);pointer-events:none}
.hero .wrap{position:relative}
.hero .lede{font-size:clamp(1.1rem,1.6vw,1.3rem);color:var(--ink-2);max-width:36em;margin-top:22px;text-wrap:pretty}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
@media (max-width:860px){.hero-grid{grid-template-columns:1fr}}
.crumb{font-size:.85rem;color:var(--ink-3);margin-bottom:16px}
.crumb a{color:var(--ink-3);text-decoration:none}
.crumb a:hover{color:var(--ink)}

.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:.98rem;padding:12px 20px;border-radius:999px;text-decoration:none;border:1px solid transparent;transition:background .15s,border-color .15s,color .15s}
.btn-primary{background:var(--ember);color:#160A04;border-color:var(--ember)}
.btn-primary:hover{background:var(--ember-2);color:#160A04}
.btn-ghost{color:var(--ink);border-color:var(--rule-2);background:transparent}
.btn-ghost:hover{border-color:var(--ink-3);color:var(--ink)}

.pills{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.pill{display:inline-flex;align-items:center;gap:7px;font-size:.8rem;font-weight:600;padding:5px 11px;border-radius:999px;background:var(--ember-soft);color:var(--ember-ink);border:1px solid color-mix(in srgb,var(--ember) 30%,transparent);white-space:nowrap}
.pill.neutral{background:var(--bg-2);color:var(--ink-2);border-color:var(--rule)}
.pill .dot{width:7px;height:7px;border-radius:50%;background:currentColor;flex:none}

/* principles aside */
.aside-card{background:var(--card);border:1px solid var(--rule);border-radius:var(--radius);padding:24px 26px}
.aside-card .eyebrow{margin-bottom:14px;display:block}
.aside-card ol{margin:0;padding:0;list-style:none;display:grid;gap:14px}
.aside-card li{display:grid;grid-template-columns:28px 1fr;gap:10px;color:var(--ink-2);font-size:.98rem;line-height:1.5}
.aside-card li span{font-family:"JetBrains Mono",monospace;color:var(--ember-ink);font-size:.85rem;padding-top:2px}
.aside-card li b{color:var(--ink);font-weight:600}

section{padding-block:clamp(48px,7vw,88px)}
section+section{border-top:1px solid var(--rule)}
.sec-head{max-width:42em;margin-bottom:36px}
.sec-head p{margin-top:12px;color:var(--ink-2);font-size:1.05rem;text-wrap:pretty}
.sec-head .eyebrow{display:block;margin-bottom:12px}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media (max-width:900px){.grid-3{grid-template-columns:1fr}}
@media (max-width:760px){.grid-2{grid-template-columns:1fr!important}}
.card{background:var(--card);border:1px solid var(--rule);border-radius:var(--radius);padding:26px}
.card h3{margin-bottom:10px}
.card p{color:var(--ink-2)}
.card p+p{margin-top:10px}
.card .num{font-family:"JetBrains Mono",monospace;font-size:.8rem;color:var(--ember-ink);margin-bottom:14px;display:block}

.project{display:grid;grid-template-columns:1fr auto;gap:18px;align-items:start;padding:30px;text-decoration:none;color:inherit;transition:border-color .15s}
.project:hover{border-color:var(--ember);color:inherit}
.project .arrow{color:var(--ember-ink);font-size:1.5rem;line-height:1;padding-top:4px}
.project h3{font-size:1.6rem;margin:12px 0 10px}
.project p{color:var(--ink-2)}
.project .go{margin-top:16px;color:var(--ember-ink);font-weight:600;font-size:.95rem}

.prose{max-width:42em}
.prose p+p{margin-top:16px}
.prose ul{padding-left:1.2em;color:var(--ink-2);margin:14px 0 0}
.prose li+li{margin-top:8px}
.prose strong{color:var(--ink)}

.tbl-wrap{overflow-x:auto;border:1px solid var(--rule);border-radius:var(--radius);background:var(--card)}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--rule);vertical-align:top}
th{font-weight:600;color:var(--ink);background:var(--bg-2);font-size:.85rem;letter-spacing:.02em}
tr:last-child td{border-bottom:0}
td.n,th.n{text-align:right;font-family:"JetBrains Mono",monospace;font-variant-numeric:tabular-nums;white-space:nowrap}
td.k{color:var(--ink);font-weight:500;white-space:nowrap}
.hl{color:var(--ember-ink);font-weight:600}
caption{caption-side:bottom;text-align:left;padding:12px 16px;font-size:.85rem;color:var(--ink-3)}

.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:16px}
.steps li{counter-increment:s;display:grid;grid-template-columns:44px 1fr;gap:14px;align-items:start}
.steps li::before{content:counter(s,decimal-leading-zero);font-family:"JetBrains Mono",monospace;color:var(--ember-ink);font-size:.9rem;padding-top:3px}
.steps b{display:block;color:var(--ink);font-weight:600}
.steps span{color:var(--ink-2)}

.callout{border-left:3px solid var(--ember);padding:14px 18px;background:var(--ember-soft);border-radius:0 8px 8px 0;color:var(--ink-2);max-width:42em}
.callout b{color:var(--ink)}

.contact{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media (max-width:760px){.contact{grid-template-columns:1fr}}
.contact .big{font-size:clamp(1.2rem,2.4vw,1.6rem);font-weight:600;word-break:break-word}

.diagram{width:100%;height:auto;display:block;margin-top:32px}
.diagram text{font-family:"Instrument Sans",system-ui,sans-serif}
.diagram .mono{font-family:"JetBrains Mono",ui-monospace,monospace}

footer{border-top:1px solid var(--rule);padding-block:36px;color:var(--ink-3);font-size:.9rem}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer nav{display:flex;gap:18px;flex-wrap:wrap}
footer a{color:var(--ink-2);text-decoration:none}
footer a:hover{color:var(--ink)}

/* phone-width fixes: diagrams scroll instead of shrinking; tables keep readable columns */
.diagram-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin-top:32px}
.diagram-wrap .diagram{margin-top:0;min-width:680px}
@media (max-width:760px){.tbl-wrap table{min-width:640px}}
.tbl-note{font-size:.85rem;color:var(--ink-3);margin-top:10px;max-width:60em}

/* floating embers: CSS only, fixed layer under the content, off for reduced motion */
.embers{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.embers i{position:absolute;left:var(--x);bottom:-4vh;width:var(--s);height:var(--s);border-radius:50%;
  background:radial-gradient(circle at 40% 40%,#FFE0B0 0%,#FFA34D 45%,rgba(255,122,47,0) 72%);
  box-shadow:0 0 calc(var(--s) * 1.2) rgba(255,138,61,.25);
  opacity:0;animation:ember-rise var(--d) linear var(--t) infinite}
@keyframes ember-rise{
  0%{transform:translate3d(0,0,0) scale(.6);opacity:0}
  8%{opacity:var(--o,.3)}
  35%{transform:translate3d(calc(var(--w) * .6),-38vh,0) scale(1)}
  60%{opacity:calc(var(--o,.3) * .85)}
  70%{transform:translate3d(calc(var(--w) * -.4),-74vh,0) scale(.9)}
  100%{transform:translate3d(calc(var(--w) * .2),-112vh,0) scale(.4);opacity:0}
}
:root[data-theme="light"] .embers{opacity:.7}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]) .embers{opacity:.7}}
@media (prefers-reduced-motion: reduce){.embers{display:none}}
.site-head,main,footer,.wrap.anim{position:relative;z-index:1}

/* grid items may shrink so scrolling tables stay inside their column */
.grid-2>*,.grid-3>*{min-width:0}

/* logo: the ember's outer glow breathes slowly */
.brand .ember-glow{animation:ember-breathe 3.6s ease-in-out infinite}
@keyframes ember-breathe{0%,100%{opacity:.5}50%{opacity:.85}}
@media (prefers-reduced-motion: reduce){.brand .ember-glow{animation:none}}