@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Playfair+Display:wght@400;600;700;900&family=JetBrains+Mono:wght@400;600;700&display=swap');
/* Canonical tokens — see /design-tokens.css and Particle_Contracts.md §DesignTokens.
   The :root block below keeps proofnetbtc.com marketing's slightly warmer
   background (#0d1117 vs canonical #0b0f14) as an intentional local override;
   every other token resolves to the canonical value via var(). */
@import url('/design-tokens.css');
*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#0d1117;--surface:#161b22;--surface2:#111820;--rule:#30363d;--serif:'Playfair Display',Georgia,serif}
html,body{background:var(--bg);color:var(--ink)}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
code,pre,.mono{font-family:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace}
code{font-size:.9em;background:rgba(255,255,255,.04);padding:2px 6px;border-radius:3px;color:var(--accent)}
pre{white-space:pre-wrap;overflow:auto}
.announce-bar{background:linear-gradient(90deg,#238636,#f7931a);text-align:center;padding:0 24px;font-size:13px;font-weight:700;color:#fff;position:sticky;top:0;z-index:50;height:38px;line-height:38px;box-sizing:border-box;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.announce-bar a{color:#fff;text-decoration:underline;margin-left:6px}
nav{background:rgba(13,17,23,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--rule);padding:0 24px;position:sticky;top:0;z-index:50}
.nav-inner{max-width:1240px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:72px}
.nav-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800}
.nav-brand:hover{text-decoration:none}
.nav-brand:hover{text-decoration:none}
.nav-brand img{height:36px}
.brand-text{font-size:15px}
.qs-label{font-size:9px;font-weight:800;color:var(--green);margin-left:6px;letter-spacing:.08em;text-transform:uppercase}
.nav-links{display:flex;gap:22px;align-items:center}
.nav-links a{color:var(--soft);font-size:14px;font-weight:600}
.nav-links a:hover,.nav-links a.active{color:var(--ink);text-decoration:none}
.nav-cross{color:var(--green)!important;display:inline-flex;align-items:center;gap:4px}
.nav-cross:hover{color:#7ee787!important;text-decoration:none}
.nav-cross .nav-cross-arrow{font-size:11px;opacity:.7;transition:transform .15s}
.nav-cross:hover .nav-cross-arrow{transform:translate(2px,-2px);opacity:1}
.nav-cta{padding:9px 18px;border-radius:6px;background:var(--green);color:#fff!important;font-size:13px;border:1px solid var(--green)}
.nav-cta:hover{background:#238636}
.nav-new{display:inline-flex;align-items:center;gap:5px;font-size:9px;font-weight:900;letter-spacing:.12em;color:#fbbf24;margin-right:5px;padding:2px 6px;background:rgba(255,255,255,.13);border-radius:3px;white-space:nowrap;vertical-align:middle;line-height:1}
.nav-new::before{content:"";display:inline-block;width:6px;height:6px;flex:0 0 6px;background:#fbbf24;border-radius:2px;box-shadow:0 0 6px #fbbf24,0 0 10px rgba(251,191,36,.55);animation:navBlink 1.1s infinite}
.nav-links a{white-space:nowrap}
@keyframes navBlink{0%,100%{opacity:1;box-shadow:0 0 6px #fbbf24,0 0 12px rgba(251,191,36,.7)}50%{opacity:.25;box-shadow:0 0 2px #fbbf24,0 0 4px rgba(251,191,36,.2)}}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--rule);background:linear-gradient(180deg,#161b22 0%,#0d1117 100%)}
.hero .wrap{padding-top:76px;padding-bottom:72px}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:34px;align-items:center}
.eyebrow,.kicker{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
h1,h2,h3{color:var(--ink)}
h1{font-family:var(--serif);font-size:clamp(36px,4.2vw,56px);font-weight:700;line-height:1.08;margin-bottom:18px}
h1 .accent,h2 .accent{color:var(--accent);font-style:italic;font-weight:400}
.lede{max-width:760px;color:var(--soft);font-size:18px;line-height:1.65}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.btn,button.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 18px;border-radius:6px;border:1px solid var(--rule);background:transparent;color:var(--ink);font-weight:800;font-size:13px;cursor:pointer}
.btn:hover,button.btn:hover{text-decoration:none;border-color:var(--accent)}
.btn.primary{background:linear-gradient(180deg,#2ea043,#238636);border-color:#2ea043;color:#fff}
.btn.accent{background:rgba(247,147,26,.12);border-color:rgba(247,147,26,.65)}
.panel{background:var(--surface);border:1px solid var(--rule);border-radius:8px;padding:24px}
.panel-strong{background:linear-gradient(180deg,#161b22,#0d1117);border:1px solid rgba(247,147,26,.34);border-radius:8px;padding:24px}
.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.metric{border:1px solid var(--rule);background:rgba(255,255,255,.02);border-radius:6px;padding:13px;min-width:0}
.metric span{display:block;font-size:10px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:5px}
.metric strong{display:block;font-size:13px;color:var(--ink);overflow-wrap:anywhere}
.section{padding:66px 0;border-bottom:1px solid var(--rule);scroll-margin-top:96px}
.section:last-child{border-bottom:none}
.section-head{max-width:760px;margin-bottom:26px}
.section-head h2{font-family:var(--serif);font-size:30px;line-height:1.18;margin-bottom:10px}
.section-head p{color:var(--soft);line-height:1.65}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.grid-5{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.card{background:var(--surface);border:1px solid var(--rule);border-radius:8px;padding:20px;min-width:0}
.card:hover{border-color:rgba(247,147,26,.65)}
.card .kicker{color:var(--green);margin-bottom:8px}
.card h3{font-size:18px;margin-bottom:8px}
.card p,.card li{font-size:13.5px;color:var(--soft);line-height:1.65}
.tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}
.tags span,.tag{font-size:10px;font-weight:700;color:var(--soft);border:1px solid var(--rule);background:rgba(255,255,255,.02);padding:3px 8px;border-radius:3px}
.tag.green{border-color:rgba(46,160,67,.45);color:#7ee787;background:rgba(46,160,67,.07)}
.tag.orange{border-color:rgba(247,147,26,.5);color:#fbbf24;background:rgba(247,147,26,.08)}
.build-board{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.build-check{display:grid;grid-template-columns:32px 1fr;gap:12px;align-items:flex-start;background:var(--surface);border:1px solid var(--rule);border-radius:8px;padding:16px;min-width:0}
.build-box{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:6px;border:1px solid rgba(46,160,67,.6);background:rgba(46,160,67,.12);color:#7ee787;font-size:16px;font-weight:900;line-height:1;flex:0 0 auto}
.build-check h3{font-size:15px;margin-bottom:5px;color:var(--ink)}
.build-check p{font-size:12.5px;color:var(--soft);line-height:1.55}
.build-check strong{color:#7ee787}
.ready-board{border:1px solid var(--rule);border-radius:8px;overflow:hidden;background:var(--surface);margin-bottom:24px}
.ready-row{display:grid;grid-template-columns:1fr repeat(4,minmax(0,.95fr));gap:0;border-top:1px solid var(--rule)}
.ready-row:first-child{border-top:0}
.ready-head{background:rgba(255,255,255,.03);font-size:10px;font-weight:900;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.ready-cell{padding:14px;border-left:1px solid var(--rule);font-size:12.5px;color:var(--soft);line-height:1.45;min-width:0}
.ready-cell:first-child{border-left:0}
.ready-cell strong{display:block;color:var(--ink);font-size:13px}
.ready-item{display:flex;gap:8px;align-items:flex-start}
.ready-box{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:5px;border:1px solid rgba(46,160,67,.65);background:rgba(46,160,67,.12);color:#7ee787;font-size:13px;font-weight:900;line-height:1;flex:0 0 auto}
.step{background:var(--surface2);border:1px solid var(--rule);border-radius:8px;padding:16px;min-height:140px}
.step .num{color:var(--accent);font-weight:900;font-size:12px;margin-bottom:10px}
.step h3{font-size:15px;margin-bottom:7px}
.step p{font-size:12.5px;color:var(--soft);line-height:1.6}
.matrix{overflow:hidden;border:1px solid var(--rule);border-radius:8px;background:var(--surface)}
.matrix-row{display:grid;grid-template-columns:.9fr .95fr 1.3fr .7fr;gap:12px;border-bottom:1px solid var(--rule);padding:14px 16px;font-size:13px}
.matrix-row:last-child{border-bottom:none}
.matrix-head{background:rgba(255,255,255,.03);font-size:10px;font-weight:900;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.matrix-row div{overflow-wrap:anywhere}
.muted{color:var(--muted)}
.soft{color:var(--soft)}
.green{color:#7ee787}
.orange{color:var(--accent)}
.screen{background:#080c12;border:1px solid var(--rule);border-radius:8px;padding:16px;color:#d9f8dd;font-size:12px;line-height:1.75}
.select{width:100%;border:1px solid var(--rule);border-radius:6px;background:#080c12;color:var(--ink);padding:12px;font:600 14px 'Inter',sans-serif;outline:none}
.select:focus{border-color:var(--accent)}
.copy-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.notice{background:rgba(247,147,26,.06);border-left:3px solid var(--accent);border-radius:0 8px 8px 0;padding:18px 20px;color:var(--soft);font-size:13.5px;line-height:1.65}
.footer{background:#050a12;color:var(--muted);padding:42px 24px 32px;border-top:1px solid var(--rule);font-size:12px}
.footer-inner{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}
.footer-brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:800}
.footer-brand img{height:26px}
.footer-meta{text-align:right;line-height:1.7}
@media(max-width:980px){.hero-grid,.grid-2,.grid-3,.grid-4,.grid-5,.build-board,.ready-row{grid-template-columns:1fr}.metric-grid{grid-template-columns:repeat(2,1fr)}.matrix-row{grid-template-columns:1fr}.matrix-head,.ready-head{display:none}.ready-cell{border-left:0;border-top:1px solid var(--rule)}.ready-row:first-child+.ready-row .ready-cell:first-child{border-top:0}}
@media(max-width:700px){.qs-label{display:none}.nav-inner{height:58px}.nav-brand img{height:30px}.hero .wrap{padding-top:54px;padding-bottom:56px}.section{padding:48px 0}.metric-grid{grid-template-columns:1fr}.footer-inner{grid-template-columns:1fr;text-align:center}.footer-meta{text-align:center}}

/* ── Mobile hamburger + slide-in menu (built by /nav-mobile.js) ── */
.nav-hamburger{display:none}
@media(max-width:900px){
  .nav-links a:not(.nav-cta){display:none}
  .nav-links .menu-item{display:none}
  .nav-cta{display:none}
  .nav-hamburger{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:0;margin-left:auto;background:transparent;border:1px solid rgba(255,255,255,.1);border-radius:8px;cursor:pointer;align-items:center}
  .nav-hamburger span{display:block;width:22px;height:2px;background:#e6edf3;border-radius:2px;transition:transform .2s,opacity .2s}
  .nav-hamburger:hover{border-color:rgba(247,147,26,.4)}
}
.nav-mobile-overlay{position:fixed;inset:0;background:rgba(0,0,0,.62);z-index:1999;opacity:0;visibility:hidden;transition:opacity .22s,visibility .22s}
.nav-mobile-overlay.open{opacity:1;visibility:visible}
.nav-mobile-menu{position:fixed;top:0;right:-100%;bottom:0;width:min(320px,86vw);background:linear-gradient(180deg,#161b22 0%,#0d1117 100%);padding:60px 16px 24px;z-index:2000;overflow-y:auto;-webkit-overflow-scrolling:touch;transition:right .25s ease;border-left:1px solid rgba(247,147,26,.22);box-shadow:-12px 0 48px rgba(0,0,0,.6);font-family:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}
.nav-mobile-menu.open{right:0}
.nav-mobile-list{display:flex;flex-direction:column;gap:2px}
.nav-mobile-list a{display:block;color:#e6edf3;text-decoration:none;font-size:15px;font-weight:600;padding:12px 14px;border-radius:8px;line-height:1.3;min-height:44px;display:flex;align-items:center}
.nav-mobile-list a:hover,.nav-mobile-list a:active,.nav-mobile-list a:focus{background:rgba(255,255,255,.05);color:#fbbf24;text-decoration:none}
.nav-mobile-list a.is-cta{background:#2ea043;color:#fff;justify-content:center;font-weight:800;margin-top:14px;letter-spacing:.02em}
.nav-mobile-list a.is-cta:hover,.nav-mobile-list a.is-cta:active{background:#238636;color:#fff}
.nav-mobile-list a.is-cross{color:#7ee787}
.nav-mobile-list a.is-cross:hover{color:#a4f4a4}
.nav-mobile-list a.nav-mobile-top{font-weight:700;color:#fbbf24;font-size:14px;padding-top:6px;padding-bottom:6px;min-height:0}
.nav-mobile-group{font-size:10px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:#2ea043;padding:18px 14px 4px;margin-top:6px;border-top:1px solid rgba(255,255,255,.06)}
.nav-mobile-list > .nav-mobile-group:first-child{border-top:0;margin-top:0;padding-top:4px}
.nav-mobile-close{position:absolute;top:12px;right:12px;background:transparent;border:1px solid rgba(255,255,255,.08);color:#e6edf3;font-size:24px;line-height:1;cursor:pointer;width:40px;height:40px;border-radius:8px;display:flex;align-items:center;justify-content:center;padding:0}
.nav-mobile-close:hover{background:rgba(255,255,255,.05);border-color:rgba(247,147,26,.4)}




/* Dropdown v2 — ul/li structure beats .nav-links a cascade */
.nav-links .menu-item{position:relative;display:flex;align-items:center}
.nav-links .menu-item .menu-top{cursor:pointer;display:inline-flex;align-items:center;gap:4px;white-space:nowrap}
.nav-links .menu-item .menu-caret{font-size:10px;opacity:.6;transition:transform .18s ease}
.nav-links .menu-item:hover .menu-caret,.nav-links .menu-item:focus-within .menu-caret{transform:rotate(180deg);opacity:1}
.nav-links ul.menu-panel{position:absolute;top:100%;left:-12px;margin:10px 0 0;padding:12px;list-style:none;min-width:480px;background:linear-gradient(180deg,rgba(22,27,34,.98),rgba(13,17,23,.98));backdrop-filter:blur(18px);border:1px solid rgba(247,147,26,.3);border-radius:12px;box-shadow:0 24px 60px rgba(0,0,0,.55);opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .18s,transform .18s,visibility .18s;display:grid;grid-template-columns:1fr 1fr;gap:4px;z-index:200;box-sizing:border-box}
.nav-links .menu-item:hover ul.menu-panel,.nav-links .menu-item:focus-within ul.menu-panel{opacity:1;visibility:visible;transform:translateY(0)}
.nav-links ul.menu-panel li{list-style:none;margin:0;padding:0;display:block;min-width:0}
.nav-links ul.menu-panel li a.menu-card{display:block;padding:12px 14px;border-radius:8px;color:inherit;text-decoration:none;white-space:normal;transition:background .15s;box-sizing:border-box;width:100%;border:1px solid transparent}
.nav-links ul.menu-panel li a.menu-card:hover{background:rgba(247,147,26,.08);text-decoration:none;border-color:rgba(247,147,26,.2)}
.nav-links ul.menu-panel li a.menu-card .m-kicker{display:block;font-size:9px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:#fbbf24;margin-bottom:6px}
.nav-links ul.menu-panel li a.menu-card .m-name{display:block;font-size:15px;font-weight:700;color:#e6edf3;margin-bottom:4px;line-height:1.2}
.nav-links ul.menu-panel li a.menu-card .m-desc{display:block;font-size:12px;color:#b8c2cc;line-height:1.5;font-weight:400}
.nav-links ul.menu-panel li a.menu-card .m-head{display:flex;align-items:center;gap:8px;margin-bottom:4px}
.nav-links ul.menu-panel li a.menu-card.featured{background:linear-gradient(180deg,rgba(247,147,26,.08),rgba(247,147,26,.02));border:1px solid rgba(247,147,26,.3)}
.nav-links ul.menu-panel li a.menu-card.featured:hover{background:linear-gradient(180deg,rgba(247,147,26,.14),rgba(247,147,26,.04));border-color:rgba(247,147,26,.5)}
@media(max-width:900px){
  .nav-links ul.menu-panel{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;background:transparent;padding:6px 0 0 12px;min-width:0;grid-template-columns:1fr;display:none;margin:0}
  .nav-links .menu-item:hover ul.menu-panel,.nav-links .menu-item:focus-within ul.menu-panel{display:grid}
}

/* ---- Mobile audit pass (phone-first defensive rules) ---- */
@media(max-width:780px){
  /* Sovereign-ai demo console: stack the three columns */
  .demo-console{grid-template-columns:1fr!important;display:grid!important}
  .demo-rail,.demo-chat,.demo-evidence{border-right:0!important;border-left:0!important;border-bottom:1px solid var(--rule)}
  .demo-evidence{border-bottom:0}
  /* Blockie live chat suggestions wrap tighter */
  .bt-live-suggestions{gap:5px}
  .bt-live-chip{font-size:10.5px;padding:5px 10px}
  .bt-live-msgs{min-height:140px;max-height:320px}
  .bt-live-input button{padding:0 16px;font-size:12px}
  /* App chrome tab row scrolls horizontally cleanly */
  .app-titlebar{flex-wrap:nowrap;overflow-x:auto;gap:8px}
  .app-tabs{flex-wrap:nowrap;min-width:max-content}
  /* Bottom dock wraps to two rows */
  .app-dock{flex-direction:column;align-items:flex-start;gap:10px}
  .app-dock-tabs{flex-wrap:wrap}
  /* JSON/code blocks should never horizontal-scroll the viewport */
  pre,pre.screen,pre.demo-proof-screen,.bt-live-msg pre{max-width:100%;overflow-x:auto;font-size:11px}
  /* Proof packet metric grid tighter */
  .demo-evidence-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  /* Hero CTA stacking on tiny phones */
  .hero-ctas{flex-direction:column;align-items:stretch}
  .hero-ctas .hero-btn{width:100%;justify-content:center}
  /* Compact architecture tools/users/callouts grid */
  .arch-tools,.arch-users,.arch-callouts,.industry-grid,.stack-diagram,.cost-stack{grid-template-columns:1fr!important}
  /* Compare table already stacks */
  /* Blockie Talkie demo tool grid goes to 2-col max */
  .demo-tool-grid{grid-template-columns:1fr 1fr!important}
  .demo-evidence-grid{grid-template-columns:1fr!important}
  /* Live chat in phone portrait */
  .bt-live-card{padding:16px}
  .bt-live-header{gap:10px;padding-bottom:12px;margin-bottom:12px}
  .bt-live-header img{width:36px;height:36px}
  /* Prose quotes shrink to fit */
  .provost-quote .pq-text{font-size:26px!important}
  .provost-quote{padding:22px 18px 18px 26px!important}
  .provost-quote .pq-mark{font-size:56px!important;left:8px!important}
  /* Six-card Technology how-it-works stacks */
  .stack-grid{grid-template-columns:1fr!important}
  /* Generic grid-2 / grid-3 safety */
  .grid-2,.grid-3,.positioning-grid{grid-template-columns:1fr!important}
  /* Section label/h2 resize */
  .section-head h2{font-size:28px!important}
  /* Offerings / demo index grid collapse */
  .grid-5{grid-template-columns:1fr!important}
  /* Footer stacks */
  .footer-inner{grid-template-columns:1fr!important;text-align:center}
  .footer-meta{text-align:center!important}
}
@media(max-width:420px){
  /* Very narrow phones */
  h1{font-size:38px!important}
  .hero-big h1{font-size:40px!important}
  .section{padding:42px 0}
  .bt-live-suggestions{flex-direction:column;align-items:stretch}
  .bt-live-chip{text-align:center}
  .app-brand-text strong{font-size:12px}
  .app-brand-text span{font-size:9px}
  .app-crumb-title{font-size:13px}
}