/* =============================================================================
   AI Architect — home.css (index.html only)
   Authored exclusively against the vendored design-system aliases in
   /ds/tokens/surfaces.css + /ds/tokens/colors.css. No raw hex except the
   values already present in /ds/assets/logo/ (measured seal conversions —
   none used here). Survives data-surface="paper" (default) and
   data-surface="ink" unchanged, per the design gate (G1-G6).
   ============================================================================= */

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--canvas);color:var(--text);font:var(--role-body);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.serif{font-family:var(--font-serif);font-weight:var(--weight-regular);letter-spacing:-0.01em}
.mono{font-family:var(--font-mono);font-feature-settings:"ss01","cv01"}
.container{max-width:1280px;margin:0 auto;padding:0 28px}
.eyebrow{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-caps);text-transform:uppercase;color:var(--text-muted);font-weight:var(--weight-medium);display:inline-flex;align-items:center;gap:8px}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--accent);display:inline-block}

/* TICKER BAR — nested night-record instrument (G1/G2: never raw black) */
.ticker{padding:9px 0;overflow:hidden;font-family:var(--font-mono);font-size:var(--text-2xs);letter-spacing:var(--tracking-mono);background:var(--canvas);color:var(--text-secondary);border-bottom:1px solid var(--border)}
.ticker-track{display:flex;gap:48px;animation:scroll 50s linear infinite;white-space:nowrap}
.ticker-track span{display:inline-flex;align-items:center;gap:10px}
.ticker-track span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}
@keyframes scroll{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.ticker-track{animation:none}}

/* NAV */
nav.topnav{position:sticky;top:0;z-index:50;background:color-mix(in oklab, var(--canvas) 92%, transparent);border-bottom:1px solid var(--border)}
nav.topnav .inner{display:flex;align-items:center;justify-content:space-between;padding:16px 28px;max-width:1280px;margin:0 auto;gap:24px}
.logo{display:flex;align-items:center;gap:12px;font-weight:var(--weight-semibold);font-size:var(--text-sm);letter-spacing:-0.01em;color:var(--text)}
.logo-mark{width:28px;height:28px;border:1px solid var(--accent);background:var(--accent-soft);display:grid;place-items:center;border-radius:var(--radius-sm);position:relative;transition:transform .35s ease,background .25s ease;flex:none}
.logo:hover .logo-mark{transform:rotate(45deg);background:var(--accent)}
.logo-mark::before{content:"";position:absolute;inset:5px;border:1px solid var(--accent);border-radius:1px;transform:rotate(45deg)}
.logo-mark::after{content:"";position:absolute;width:5px;height:5px;background:var(--accent);border-radius:50%}
.navlinks{display:flex;gap:24px;align-items:center;font-size:var(--text-sm);color:var(--text-secondary);flex-wrap:wrap}
.navlinks a:not(.nav-cta){position:relative;padding:4px 0;transition:color var(--dur-fast) var(--ease)}
.navlinks a:not(.nav-cta)::after{content:'';position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .25s ease}
.navlinks a:not(.nav-cta):hover{color:var(--text)}
.navlinks a:not(.nav-cta):hover::after{transform:scaleX(1)}
.navlinks a[aria-current="page"]{color:var(--accent-ink)}
.nav-cta{background:var(--accent);color:var(--on-accent);padding:9px 18px;border-radius:var(--radius-sm);font-size:var(--text-sm);font-weight:var(--weight-semibold);letter-spacing:0.01em;transition:background var(--dur-fast) var(--ease),transform var(--dur-fast) var(--ease)}
.nav-cta:hover{background:var(--accent-bright);color:var(--on-accent);transform:translateY(-1px)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media (max-width:980px){.nav-toggle{display:flex}.navlinks{position:fixed;top:0;right:0;height:100vh;width:min(280px,80vw);background:var(--canvas);flex-direction:column;align-items:flex-start;gap:0;padding:88px 28px 28px;transform:translateX(100%);transition:transform .25s var(--ease);box-shadow:var(--shadow-lg);overflow-y:auto}.navlinks.nav-open{transform:translateX(0)}.navlinks a:not(.nav-cta){display:block;width:100%;padding:12px 0}.navlinks a.nav-cta{display:inline-flex;margin-top:16px}}

/* HERO */
.hero{padding:80px 0 64px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:80px;align-items:center}
@media (max-width:1000px){.hero-grid{grid-template-columns:1fr;gap:48px}}
.hero h1{font-family:var(--font-serif);font-weight:var(--weight-regular);font-size:clamp(48px,6.4vw,86px);line-height:0.96;letter-spacing:-0.025em;margin:24px 0 24px;color:var(--text)}
.hero h1 em{font-style:italic;color:var(--accent-ink)}
.hero h1 .strike{position:relative;display:inline-block;color:var(--text-muted)}
.hero h1 .strike::after{content:"";position:absolute;top:55%;left:-4px;right:-4px;height:2px;background:var(--danger-ink);transform:rotate(-3deg)}
.hero .lede{font-size:var(--text-lg);line-height:1.6;color:var(--text-secondary);max-width:580px;margin-bottom:36px}
.hero .lede strong{color:var(--text);font-weight:var(--weight-medium)}
.hero-ctas{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 22px;border-radius:var(--radius-sm);font-weight:var(--weight-medium);font-size:var(--text-sm);transition:background var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease),color var(--dur-fast) var(--ease),transform var(--dur-fast) var(--ease);cursor:pointer;border:none;font-family:inherit}
.btn-primary{background:var(--accent);color:var(--on-accent)}
.btn-primary:hover{background:var(--accent-bright);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border-strong)}
.btn-ghost:hover{border-color:var(--text);background:var(--surface-chip)}
.btn svg{width:14px;height:14px;transition:transform .2s ease}
.btn:hover svg{transform:translateX(3px)}
.hero-meta{display:flex;gap:18px;align-items:center;margin-top:24px;font-size:var(--text-2xs);color:var(--text-muted);font-family:var(--font-mono)}
.hero-meta .dot{width:6px;height:6px;background:var(--ok-ink);border-radius:50%}

/* INSTRUMENT PANEL */
.instrument{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;font-family:var(--font-mono);position:relative}
.inst-bar{padding:10px 14px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;font-size:var(--text-2xs);color:var(--text-muted);letter-spacing:var(--tracking-caps);text-transform:uppercase;background:var(--surface-chip)}
.inst-bar .left{display:flex;align-items:center;gap:14px}
.inst-bar .pulse{width:7px;height:7px;background:var(--accent);border-radius:50%;animation:dot-blink 2.2s ease-in-out infinite}
.inst-body{padding:0;position:relative}
.inst-diagram{background:var(--surface-chip);padding:0;display:flex;align-items:center;justify-content:center;overflow:hidden;aspect-ratio:1600/864}
.inst-diag-img{display:block;width:100%;height:auto}
.inst-readout{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--border)}
.inst-readout > div{padding:14px;border-right:1px solid var(--border)}
.inst-readout > div:last-child{border-right:none}
.inst-readout .num{font-family:var(--font-serif);font-size:26px;color:var(--accent-ink);line-height:1;display:block;margin-bottom:6px}
.inst-readout .lab{font-size:var(--text-3xs);letter-spacing:var(--tracking-caps);color:var(--text-muted);text-transform:uppercase}

/* PRINCIPLES */
.principles{padding:96px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--surface-chip)}
.principles-head{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:64px;align-items:end;margin-bottom:64px}
.principles-head h2{font-family:var(--font-serif);font-size:clamp(32px,3.6vw,48px);line-height:1;letter-spacing:-0.02em;margin:14px 0 0;font-weight:var(--weight-regular);max-width:680px}
.principles-head h2 em{color:var(--accent-ink);font-style:italic}
.principles-head .deck{font-size:var(--text-sm);line-height:1.55;color:var(--text-secondary);max-width:420px}
.principles-head .deck em{font-family:var(--font-serif);font-style:italic;color:var(--text)}
@media (max-width:880px){.principles-head{grid-template-columns:1fr;gap:28px}.principles-head .deck{max-width:none}}
.principles-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--border)}
@media (max-width:980px){.principles-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.principles-grid{grid-template-columns:1fr}}
.pr{padding:36px 32px;border-right:1px solid var(--border);position:relative}
.pr:first-child{padding-left:0}
.pr:last-child{border-right:none;padding-right:0}
@media (max-width:980px){.pr{padding:32px 24px}.pr:first-child{padding-left:0}.pr:nth-child(2){border-right:none;padding-right:0}.pr:nth-child(3){padding-left:0;border-top:1px solid var(--border);padding-top:32px}.pr:nth-child(4){border-right:none;padding-right:0;border-top:1px solid var(--border);padding-top:32px}}
@media (max-width:560px){.pr,.pr:first-child,.pr:nth-child(2),.pr:nth-child(3),.pr:nth-child(4){padding:28px 0;border-right:none}.pr:not(:first-child){border-top:1px solid var(--border)}}
.pr-num{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--accent-ink);margin-bottom:20px;letter-spacing:var(--tracking-mono)}
.pr h4{font-family:var(--font-serif);font-size:24px;font-weight:var(--weight-regular);letter-spacing:-0.01em;margin:0 0 14px;color:var(--text)}
.pr p{font-size:var(--text-sm);color:var(--text-secondary);line-height:1.6;margin:0}

/* PROOF */
.proof{padding:120px 0;border-bottom:1px solid var(--border);position:relative}
.proof h2{font-family:var(--font-serif);font-size:clamp(40px,5vw,68px);line-height:1;letter-spacing:-0.02em;margin:14px 0 0;font-weight:var(--weight-regular);max-width:680px;color:var(--text)}
.proof h2 em{font-style:italic;color:var(--accent-ink)}
.proof-head{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:64px;align-items:end;margin-bottom:64px}
@media (max-width:880px){.proof-head{grid-template-columns:1fr;gap:24px}}
.proof .lede{font-size:var(--text-sm);color:var(--text-secondary);line-height:1.55;margin:0;max-width:420px}
.proof-frame{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;display:grid;grid-template-columns:280px 1fr;min-height:540px}
@media (max-width:900px){.proof-frame{grid-template-columns:1fr}}
.proof-side{background:var(--surface-chip);border-right:1px solid var(--border);padding:24px}
.proof-side .ttl{font-family:var(--font-mono);font-size:var(--text-2xs);letter-spacing:var(--tracking-caps);color:var(--text-muted);text-transform:uppercase;margin-bottom:20px}
.checks{display:flex;flex-direction:column;gap:12px}
.check{padding:12px 14px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);display:flex;align-items:start;gap:12px;font-size:var(--text-xs);cursor:pointer;transition:border-color .15s}
.check:hover{border-color:var(--border-strong)}
.check.active{border-color:var(--accent);background:var(--accent-soft)}
.check .ic{width:18px;height:18px;border-radius:50%;background:var(--surface-chip);display:grid;place-items:center;flex-shrink:0;margin-top:1px}
.check .ic svg{width:10px;height:10px;color:var(--ok-ink)}
.check .meta{flex:1}
.check .meta b{display:block;font-weight:var(--weight-medium);font-size:var(--text-xs);color:var(--text);margin-bottom:2px}
.check .meta span{font-size:var(--text-2xs);color:var(--text-muted);font-family:var(--font-mono);letter-spacing:var(--tracking-mono)}
.proof-main{padding:32px 36px;display:flex;flex-direction:column;gap:18px;overflow:auto}
.proof-main .topbar{display:flex;justify-content:space-between;align-items:center;padding-bottom:18px;border-bottom:1px solid var(--border);gap:12px;flex-wrap:wrap}
.proof-main .topbar h5{margin:0;font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--text)}
.proof-main .topbar .stat{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--ok-ink);background:oklch(76% 0.13 155/.08);border:1px solid color-mix(in oklab, var(--ok-ink) 30%, transparent);padding:5px 9px;border-radius:var(--radius-xs);letter-spacing:var(--tracking-mono)}
.claim{background:var(--surface-chip);border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px;display:flex;gap:18px;align-items:start}
.claim .id{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--accent-ink);background:var(--accent-soft);padding:4px 8px;border-radius:var(--radius-xs);letter-spacing:var(--tracking-mono);flex-shrink:0}
.claim .body{flex:1}
.claim .text{font-size:var(--text-sm);color:var(--text);line-height:1.55;margin-bottom:10px}
.claim .evidence{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-secondary);line-height:1.55;background:var(--surface);border:1px solid var(--border);padding:8px 12px;border-radius:var(--radius-xs)}
.claim .evidence b{color:var(--accent-ink)}
.claim .verdict{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-mono);display:inline-flex;gap:6px;margin-top:10px;padding:4px 9px;border-radius:var(--radius-xs);background:oklch(76% 0.13 155/.08);color:var(--ok-ink);border:1px solid color-mix(in oklab, var(--ok-ink) 30%, transparent)}

/* PRODUCTS */
.products{padding:120px 0;border-bottom:1px solid var(--border)}
.products-head{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:64px;align-items:end;margin-bottom:56px}
@media (max-width:880px){.products-head{grid-template-columns:1fr;gap:24px}}
.products-head h2{font-family:var(--font-serif);font-size:clamp(38px,4.6vw,60px);line-height:1;letter-spacing:-0.02em;margin:14px 0 0;font-weight:var(--weight-regular);max-width:680px;color:var(--text)}
.products-head h2 em{font-style:italic;color:var(--accent-ink)}
.products-head .deck{font-size:var(--text-sm);line-height:1.55;color:var(--text-secondary);max-width:420px}
.products-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media (max-width:1180px){.products-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:680px){.products-grid{grid-template-columns:1fr}}
.products-grid.has-5{grid-template-columns:repeat(5,1fr)}
@media (max-width:1400px){.products-grid.has-5{grid-template-columns:repeat(3,1fr)}}
@media (max-width:900px){.products-grid.has-5{grid-template-columns:repeat(2,1fr)}}
@media (max-width:680px){.products-grid.has-5{grid-template-columns:1fr}}
.pcard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:0;overflow:hidden;display:flex;flex-direction:column;transition:border-color .2s, transform .2s;position:relative}
.pcard:hover{border-color:var(--accent);transform:translateY(-2px)}
.pcard .pcard-head{padding:22px 22px 0;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px 12px;min-height:24px}
.pcard .pcard-tag{font-family:var(--font-mono);font-size:var(--text-2xs);letter-spacing:var(--tracking-caps);color:var(--accent-ink);text-transform:uppercase;white-space:nowrap}
.pcard .pcard-version{font-family:var(--font-mono);font-size:var(--text-2xs);color:var(--text-muted);min-width:0;flex:1 1 auto;text-align:right;overflow-wrap:anywhere;word-break:break-word}
.pcard h3{font-family:var(--font-serif);font-size:clamp(24px,2.1vw,30px);font-weight:var(--weight-regular);letter-spacing:-0.015em;margin:16px 22px 4px;line-height:1.05;color:var(--text)}
.pcard .one{margin:0 22px 14px;font-size:var(--text-sm);color:var(--text-secondary);font-weight:var(--weight-regular);line-height:1.5;min-height:42px}
.pcard .feature{margin:6px 22px 18px;background:var(--canvas);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;position:relative;flex:1;display:flex;flex-direction:column;gap:14px}
.pcard .feature .ftop{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:6px 10px;font-family:var(--font-mono);font-size:var(--text-2xs);color:var(--text-muted);letter-spacing:var(--tracking-mono)}
.pcard .feature .ftop > span{min-width:0;overflow-wrap:anywhere;word-break:break-word}
.pcard .feature .ftop > span:last-child{text-align:right;flex:1 1 auto}
.pcard .feature .ftop .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;margin-right:6px;animation:dot-blink 2.2s ease-in-out infinite;vertical-align:middle}
.pcard .feature .fbody{display:flex;align-items:flex-end;flex-wrap:wrap;gap:10px;margin:0;flex:1;min-width:0}
.pcard .feature .fnum{font-family:var(--font-serif);font-size:clamp(36px,3.6vw,48px);line-height:0.9;color:var(--text);letter-spacing:-0.03em;font-weight:var(--weight-regular)}
.pcard .feature .funit{font-family:var(--font-mono);font-size:var(--text-3xs);color:var(--text-secondary);letter-spacing:var(--tracking-mono);text-transform:uppercase;line-height:1.4;padding-bottom:6px;min-width:0;overflow-wrap:anywhere}
.pcard .feature .ftags{display:flex;gap:5px;flex-wrap:wrap}
.pcard .feature .ftag{font-family:var(--font-mono);font-size:var(--text-3xs);color:var(--text);background:var(--surface);border:1px solid var(--border);padding:3px 6px;border-radius:2px;letter-spacing:var(--tracking-mono);text-transform:uppercase;overflow-wrap:anywhere;word-break:break-word;max-width:100%}
.pcard .feature .ftag.ac{color:var(--accent-ink);border-color:color-mix(in oklab, var(--accent-ink) 40%, transparent);background:var(--accent-soft)}
.pcard .footer{padding:18px 24px;display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--border);margin-top:auto;gap:10px 14px}
.pcard .footer .arrow{flex:none}
.pcard .footer .gh{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-secondary);letter-spacing:var(--tracking-mono);flex:1 1 auto;min-width:0;overflow-wrap:anywhere;word-break:break-word}
.pcard .footer .gh svg{width:14px;height:14px;flex-shrink:0}
.pcard .footer .arrow{width:32px;height:32px;border-radius:50%;border:1px solid var(--border-strong);display:grid;place-items:center;color:var(--text-secondary);transition:all .2s;flex-shrink:0}
.pcard:hover .footer .arrow{background:var(--accent);color:var(--on-accent);border-color:var(--accent);transform:translateX(2px)}
.pcard .footer .arrow svg{width:13px;height:13px}

/* COMPANIONS */
.companions{padding:88px 0;border-bottom:1px solid var(--border);background:var(--surface-chip)}
.companions-head{margin-bottom:40px;max-width:680px}
.companions-head h2{font-family:var(--font-serif);font-size:clamp(30px,3.4vw,44px);line-height:1;letter-spacing:-0.02em;margin:14px 0 12px;font-weight:var(--weight-regular);color:var(--text)}
.companions-head h2 em{font-style:italic;color:var(--accent-ink)}
.companions-head p{font-size:var(--text-sm);color:var(--text-secondary);line-height:1.55;margin:0}
.companions-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media (max-width:980px){.companions-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.companions-grid{grid-template-columns:1fr}}
.ccard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;transition:border-color .2s,transform .2s}
.ccard:hover{border-color:var(--accent);transform:translateY(-2px)}
.ccard .ctag{font-family:var(--font-mono);font-size:var(--text-2xs);letter-spacing:var(--tracking-caps);color:var(--accent-ink);text-transform:uppercase;display:block;margin-bottom:8px}
.ccard h4{font-family:var(--font-serif);font-size:20px;font-weight:var(--weight-regular);margin:0 0 8px;color:var(--text)}
.ccard p{font-size:var(--text-xs);color:var(--text-secondary);line-height:1.55;margin:0}
.ccard .cver{display:block;margin-top:12px;font-family:var(--font-mono);font-size:var(--text-3xs);color:var(--text-faint);letter-spacing:var(--tracking-mono)}

/* PATHS */
.paths{padding:120px 0;border-bottom:1px solid var(--border);background:var(--surface-chip)}
.paths-head{margin-bottom:56px}
.paths-head h2{font-family:var(--font-serif);font-size:clamp(38px,4.6vw,60px);line-height:1;letter-spacing:-0.02em;margin:14px 0 18px;font-weight:var(--weight-regular);max-width:760px;color:var(--text)}
.paths-head h2 em{font-style:italic;color:var(--accent-ink)}
.paths-head .sub{color:var(--text-secondary);font-size:var(--text-lg);max-width:620px}
.paths-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:880px){.paths-grid{grid-template-columns:1fr}}
.path{padding:36px;border-radius:var(--radius-md);display:flex;flex-direction:column;min-height:440px;position:relative;overflow:hidden;background:var(--surface);color:var(--text);border:1px solid var(--border)}
.path.biz{border:1px solid var(--border-strong);box-shadow:inset 0 0 0 1px var(--accent-soft)}
.path.dev{background:var(--surface);color:var(--text);border:1px solid var(--border)}
.path-tag{margin-bottom:14px}
.path h3{font-family:var(--font-serif);font-size:38px;line-height:1;letter-spacing:-0.02em;margin:14px 0 16px;font-weight:var(--weight-regular)}
.path .desc{font-size:var(--text-sm);line-height:1.6;margin:0 0 28px;max-width:440px;color:var(--text-secondary)}
.path ul{list-style:none;padding:0;margin:0 0 36px;font-size:var(--text-xs)}
.path ul li{padding:10px 0;border-top:1px solid var(--border);display:flex;align-items:start;gap:12px;line-height:1.5}
.path ul li:first-child{border-top:none}
.path ul li::before{content:"";width:5px;height:5px;background:var(--accent);border-radius:50%;flex-shrink:0;margin-top:7px}
.path .card-cta{margin-top:auto;display:inline-flex;align-items:center;gap:10px;font-weight:var(--weight-medium);font-size:var(--text-sm);padding:13px 22px;border-radius:var(--radius-sm);align-self:flex-start;transition:background .2s ease,color .2s ease,transform .2s ease;background:var(--accent);color:var(--on-accent)}
.path .card-cta:hover{background:var(--accent-bright);transform:translateY(-1px)}
.path .card-cta svg{transition:transform .2s ease;width:14px;height:14px}
.path .card-cta:hover svg{transform:translateX(3px)}

/* ENGAGEMENT JOURNEY */
.journey{padding:120px 0;border-bottom:1px solid var(--border)}
.journey h2{font-family:var(--font-serif);font-size:clamp(40px,5vw,68px);line-height:1;letter-spacing:-0.02em;margin:14px 0 20px;font-weight:var(--weight-regular);max-width:920px;color:var(--text)}
.journey h2 em{font-style:italic;color:var(--accent-ink)}
.journey .lede{font-size:var(--text-lg);color:var(--text-secondary);max-width:660px;margin-bottom:64px;line-height:1.6}
.journey-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--border)}
.jline{padding:32px 28px;border-right:1px solid var(--border);display:flex;flex-direction:column;gap:14px}
.jline:first-child{padding-left:0}
.jline:last-child{border-right:none;padding-right:0}
.jline h4{font-family:var(--font-serif);font-size:26px;font-weight:var(--weight-regular);letter-spacing:-0.01em;margin:0;line-height:1.1;color:var(--text)}
.jline .desc{font-size:var(--text-sm);color:var(--text-secondary);line-height:1.6;margin:0}
.jline-link{margin-top:auto;display:inline-flex;align-items:center;gap:8px;font-size:var(--text-xs);font-weight:var(--weight-medium);color:var(--accent-ink)}
.jline-link svg{width:13px;height:13px;transition:transform .2s ease}
.jline-link:hover svg{transform:translateX(3px)}
.journey .aia-footnotes{max-width:760px}
@media (max-width:980px){.journey-grid{grid-template-columns:repeat(2,1fr)}.jline{padding:28px 24px}.jline:nth-child(2){border-right:none;padding-right:0}.jline:nth-child(3){padding-left:0;border-top:1px solid var(--border);padding-top:28px}.jline:nth-child(4){border-right:none;padding-right:0;border-top:1px solid var(--border);padding-top:28px}}
@media (max-width:560px){.journey-grid{grid-template-columns:1fr}.jline,.jline:first-child,.jline:nth-child(2),.jline:nth-child(3),.jline:nth-child(4){padding:28px 0;border-right:none}.jline:not(:first-child){border-top:1px solid var(--border)}}

/* ABOUT */
.about{padding:120px 0;border-bottom:1px solid var(--border);background:var(--surface-chip)}
.about-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:80px;align-items:start}
@media (max-width:980px){.about-grid{grid-template-columns:1fr;gap:40px}}
.about-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}
.about-portrait{aspect-ratio:800/1064;position:relative;overflow:hidden;display:flex;align-items:end;padding:18px;background:var(--surface-chip)}
.about-portrait img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.about-portrait > span{position:relative;z-index:1;background:color-mix(in oklab, var(--canvas) 88%, transparent);color:var(--text);padding:8px 12px;border-radius:var(--radius-sm);font-family:var(--font-serif);font-style:italic;font-size:15px;line-height:1.25;letter-spacing:-0.005em;align-self:flex-start}
.partner-credential{display:flex;align-items:center;gap:12px;padding:16px 24px;border-top:1px solid var(--border)}
.partner-credential img{width:44px;height:44px;flex:none;border-radius:var(--radius-xs)}
.partner-credential-meta{display:flex;flex-direction:column;gap:2px;font-size:var(--text-xs);min-width:0}
.partner-credential-title{color:var(--text);font-weight:var(--weight-medium)}
.partner-credential-issuer{color:var(--text-muted);font-family:var(--font-mono);font-size:var(--text-2xs);letter-spacing:var(--tracking-mono)}
.partner-credential a{color:var(--accent-ink);border-bottom:1px dashed var(--border-strong);width:fit-content}
.about-meta{padding:24px;display:grid;grid-template-columns:1fr 1fr;gap:18px;font-size:var(--text-xs);border-top:1px solid var(--border)}
.about-meta .label{display:block;font-family:var(--font-mono);font-size:var(--text-2xs);letter-spacing:var(--tracking-caps);text-transform:uppercase;color:var(--text-muted);margin-bottom:5px}
.about-meta .val{color:var(--text)}
.about h2{font-family:var(--font-serif);font-size:clamp(36px,4.4vw,58px);line-height:1.02;letter-spacing:-0.02em;margin:14px 0 28px;font-weight:var(--weight-regular);color:var(--text)}
.about h2 em{font-style:italic;color:var(--accent-ink)}
.about-body p{font-size:var(--text-lg);line-height:1.7;color:var(--text-secondary);margin:0 0 18px}
.about-body p strong{color:var(--text);font-weight:var(--weight-medium)}
.about-quote{font-family:var(--font-serif);font-style:italic;font-size:24px;line-height:1.4;color:var(--text);border-top:1px solid var(--border-strong);padding-top:18px;margin-top:32px}

/* PAPER */
.paper{padding:120px 0;border-bottom:1px solid var(--border);background:var(--canvas)}
.paper-head{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:64px;align-items:end;margin-bottom:48px}
@media (max-width:880px){.paper-head{grid-template-columns:1fr;gap:24px}}
.paper-head h2{font-family:var(--font-serif);font-size:clamp(36px,4.4vw,58px);line-height:1;letter-spacing:-0.02em;margin:14px 0 0;font-weight:var(--weight-regular);max-width:680px;color:var(--text)}
.paper-head h2 em{font-style:italic;color:var(--accent-ink)}
.paper-head .deck{font-size:var(--text-sm);line-height:1.55;color:var(--text-secondary);max-width:420px}
.paper-card{display:grid;grid-template-columns:1fr 1.3fr;gap:64px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;align-items:stretch}
@media (max-width:980px){.paper-card{grid-template-columns:1fr;gap:0}}
.paper-side{padding:40px;display:flex;flex-direction:column;justify-content:space-between;gap:32px;position:relative;min-height:380px;background:var(--canvas);color:var(--text)}
.paper-side .pmeta{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-caps);text-transform:uppercase;color:var(--text-muted)}
.paper-side .pmeta b{color:var(--accent-ink);font-weight:var(--weight-medium)}
.paper-side h3{font-family:var(--font-serif);font-size:clamp(28px,3.4vw,40px);font-weight:var(--weight-regular);line-height:1.05;letter-spacing:-0.018em;margin:0;color:var(--text)}
.paper-side h3 em{font-style:italic;color:var(--accent-ink)}
.paper-side .pauthor{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-secondary);letter-spacing:var(--tracking-mono)}
.paper-side .pkpi{display:flex;gap:24px;flex-wrap:wrap;padding-top:16px;border-top:1px solid var(--border)}
.paper-side .pkpi > div{font-family:var(--font-mono);font-size:var(--text-2xs);letter-spacing:var(--tracking-mono);text-transform:uppercase;color:var(--text-muted)}
.paper-side .pkpi .num{display:block;font-family:var(--font-serif);font-size:26px;line-height:1;color:var(--accent-ink);text-transform:none;letter-spacing:-0.01em;margin-bottom:6px}
.paper-body{padding:40px;display:flex;flex-direction:column;gap:18px}
.paper-body p{font-size:var(--text-sm);line-height:1.7;color:var(--text-secondary);margin:0}
.paper-body p strong{color:var(--text);font-weight:var(--weight-medium)}
.paper-body .ask{background:var(--surface-chip);border:1px solid var(--border-strong);padding:18px 20px;border-radius:var(--radius-sm);font-size:var(--text-sm);line-height:1.6;color:var(--text);margin-top:6px}
.paper-body .ask b{color:var(--accent-ink);display:block;margin-bottom:4px;font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-caps);text-transform:uppercase;font-weight:var(--weight-medium)}
.paper-body .pcta{display:flex;gap:10px;flex-wrap:wrap;margin-top:auto;padding-top:14px}
.paper-body .pcta .btn{padding:12px 18px;font-size:var(--text-xs)}
.paper-body .pcta .btn svg{width:13px;height:13px}
.paper-note{margin-top:2rem;text-align:center;color:var(--text-secondary);font-size:var(--text-sm)}

/* CITATIONS */
.citations{padding:96px 0;border-bottom:1px solid var(--border);background:var(--canvas)}
.cit-head{margin-bottom:48px}
.cit-head h3{font-family:var(--font-serif);font-size:32px;font-weight:var(--weight-regular);letter-spacing:-0.01em;margin:14px 0 10px;color:var(--text)}
.cit-head p{color:var(--text-secondary);font-size:var(--text-sm);max-width:560px;margin:0}
.cit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--border)}
@media (max-width:880px){.cit-grid{grid-template-columns:1fr}}
.cit{padding:24px 28px;border-right:1px solid var(--border);border-bottom:1px solid var(--border);font-size:var(--text-xs);color:var(--text-secondary);line-height:1.55;font-family:var(--font-mono)}
.cit:nth-child(3n+1){padding-left:0}
.cit:nth-child(3n){border-right:none;padding-right:0}
@media (max-width:880px){.cit,.cit:nth-child(3n+1),.cit:nth-child(3n){padding:22px 0;border-right:none}}
.cit b{color:var(--accent-ink);font-weight:var(--weight-medium);display:block;margin-bottom:10px;font-family:var(--font-sans);font-size:var(--text-sm);letter-spacing:0}

/* FAQ */
.faq{padding:120px 0;border-bottom:1px solid var(--border)}
.faq-grid{display:grid;grid-template-columns:1fr 2fr;gap:80px;align-items:start}
@media (max-width:880px){.faq-grid{grid-template-columns:1fr;gap:40px}}
.faq h2{font-family:var(--font-serif);font-size:clamp(36px,4.4vw,58px);line-height:1;letter-spacing:-0.02em;margin:14px 0 0;font-weight:var(--weight-regular);color:var(--text)}
.faq h2 em{font-style:italic;color:var(--accent-ink)}
.faq-list{border-top:1px solid var(--border)}
.faq-item{border-bottom:1px solid var(--border);padding:22px 0}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:20px;font-size:var(--text-xl);font-weight:var(--weight-medium);letter-spacing:-0.005em;color:var(--text);cursor:pointer;background:none;border:none;width:100%;text-align:left;padding:0;font-family:inherit}
.faq-q:focus-visible{outline:none;box-shadow:var(--shadow-focus);border-radius:var(--radius-xs)}
.faq-q .plus{font-family:var(--font-serif);font-size:30px;color:var(--accent-ink);transition:transform .2s;line-height:1;flex:none}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease, padding .2s;color:var(--text-secondary);font-size:var(--text-md);line-height:1.65;max-width:760px}
.faq-item.open .faq-a{max-height:2200px;padding-top:14px}
.faq-a code{font-family:var(--font-mono);font-size:0.92em;background:var(--surface-chip);border:1px solid var(--border);padding:1px 6px;border-radius:var(--radius-xs);color:var(--accent-ink)}
.faq-a a{color:var(--accent-ink);border-bottom:1px dashed var(--border-strong)}

/* FINAL CTA */
.final{padding:140px 0;background:var(--surface-chip);position:relative;border-bottom:1px solid var(--border)}
.final-inner{position:relative;z-index:2;max-width:880px}
.final h2{font-family:var(--font-serif);font-size:clamp(48px,6vw,84px);line-height:1.04;letter-spacing:-0.025em;margin:18px 0 48px;font-weight:var(--weight-regular);color:var(--text)}
.final h2 em{font-style:italic;color:var(--accent-ink)}
.final p{font-size:19px;line-height:1.55;color:var(--text-secondary);max-width:580px;margin-bottom:40px}
.final-ctas{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.final-meta{margin-top:64px;padding-top:28px;border-top:1px solid var(--border);display:flex;gap:48px;font-size:var(--text-2xs);color:var(--text-muted);flex-wrap:wrap;font-family:var(--font-mono);letter-spacing:var(--tracking-mono)}

/* FOOTER — nested night-record instrument (matches ticker) */
footer{padding:48px 0 40px;color:var(--text-secondary);font-size:var(--text-xs);font-family:var(--font-mono);letter-spacing:var(--tracking-mono);background:var(--canvas);border-top:1px solid var(--border)}
footer .inner{max-width:1280px;margin:0 auto;padding:0 28px;display:flex;flex-direction:column;gap:28px}
footer .frow{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}
footer .flogo{color:var(--accent-ink);font-weight:var(--weight-medium);display:flex;align-items:center;gap:10px}
footer a{color:inherit;position:relative;transition:color var(--dur-fast) var(--ease)}
footer a::after{content:'';position:absolute;left:0;right:0;bottom:-2px;height:1px;background:var(--accent-ink);transform:scaleX(0);transform-origin:left;transition:transform .25s ease}
footer a:hover{color:var(--accent-ink)}
footer a:hover::after{transform:scaleX(1)}
footer .sitemap{display:grid;grid-template-columns:repeat(2,1fr);gap:8px 32px;padding-top:20px;border-top:1px solid var(--border)}
@media (max-width:780px){footer .sitemap{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){footer .sitemap{grid-template-columns:1fr}}
footer .sitemap-col span.h{display:block;color:var(--text-muted);text-transform:uppercase;letter-spacing:var(--tracking-caps);font-size:var(--text-3xs);margin-bottom:8px}
footer .sitemap-col a{display:block;width:fit-content;padding:3px 0;color:var(--text-secondary)}

.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{position:fixed;left:8px;top:8px;width:auto;height:auto;background:var(--canvas);color:var(--text);padding:8px 12px;border:1px solid var(--accent);z-index:1000;border-radius:var(--radius-sm)}

/* Email obfuscation — split spans, reverse direction; readable to humans, scrambled to harvesters */
.email-text .eu, .email-text .ea, .email-text .ed{unicode-bidi:bidi-override;direction:ltr}