:root{--bg: #0a0c0f;--surface: #101318;--surface-raised: #15191f;--surface-elevated: #1b2027;--border: #262c35;--border-strong: #343b46;--text: #eef1f5;--text-muted: #9aa4b2;--text-faint: #62697a;--accent: #ff8a3d;--accent-strong: #ffab6b;--accent-dim: #7a4420;--accent-2: #4fd3e8;--accent-2-dim: #1c4a52;--danger: #ff5d5d;--glow-accent: rgba(255, 138, 61, .35);--glow-accent-2: rgba(79, 211, 232, .28);--grid-line: rgba(255, 255, 255, .045);--grid-dot: rgba(255, 255, 255, .08);--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--max-width: 1200px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 14px;--nav-height: 72px;--nav-height-scrolled: 60px;color-scheme:dark}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-sans);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}h1,h2,h3,h4,h5,h6{margin:0;font-weight:700;letter-spacing:-.02em;line-height:1.1}p{margin:0}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}img{max-width:100%;display:block}ul,ol{margin:0;padding:0;list-style:none}::selection{background:var(--accent-dim);color:var(--text)}:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--radius-sm)}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:6px;border:2px solid var(--bg)}::-webkit-scrollbar-thumb:hover{background:var(--accent-dim)}.container{width:100%;max-width:var(--max-width);margin-inline:auto;padding-inline:24px}@media(min-width:768px){.container{padding-inline:40px}}.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.75rem;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}.eyebrow:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--glow-accent)}.mono{font-family:var(--font-mono)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:absolute;left:12px;top:-60px;background:var(--accent);color:#12080b;padding:10px 16px;border-radius:var(--radius-sm);font-weight:600;font-size:.875rem;z-index:1000;transition:top .2s ease}.skip-link:focus{top:12px}.bg-grid{position:absolute;inset:0;pointer-events:none;z-index:0;background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,black 40%,transparent 100%);mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,black 40%,transparent 100%)}.bg-dots{position:absolute;inset:0;pointer-events:none;z-index:0;background-image:radial-gradient(var(--grid-dot) 1px,transparent 1px);background-size:24px 24px;opacity:.5}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-sans);font-weight:600;font-size:.9375rem;padding:12px 22px;border-radius:var(--radius-sm);border:1px solid transparent;transition:transform .15s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease;white-space:nowrap}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--accent);color:#1a0d04;box-shadow:0 0 0 0 var(--glow-accent)}.btn-primary:hover{background:var(--accent-strong);box-shadow:0 0 24px var(--glow-accent)}.btn-ghost{background:transparent;border-color:var(--border-strong);color:var(--text)}.btn-ghost:hover{border-color:var(--accent);color:var(--accent-strong)}.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}.reveal.is-visible{opacity:1;transform:translateY(0)}@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}@keyframes pulse-node{0%,to{box-shadow:0 0 0 0 var(--glow-accent)}50%{box-shadow:0 0 0 6px transparent}}@keyframes dash-flow{to{stroke-dashoffset:-24}}.lab-section{position:relative;padding-block:64px;border-top:1px solid var(--border)}.lab-index{font-family:var(--font-mono);font-size:.75rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-2);margin-bottom:12px}.lab-title{font-size:clamp(1.5rem,1.2rem + 1.3vw,2.25rem);color:var(--text);max-width:720px}.lab-lede{margin-top:14px;max-width:640px;font-size:1.0625rem;color:var(--text-muted);line-height:1.65}.lab-panel{margin-top:32px;background:var(--surface-raised);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;overflow:hidden}@media(min-width:640px){.lab-panel{padding:32px}}.lab-note{margin-top:18px;font-size:.875rem;color:var(--text-muted);line-height:1.6;max-width:640px}.lab-note strong{color:var(--text)}.lab-note-warn{border-left:2px solid var(--accent);padding-left:14px}.lab-code{font-family:var(--font-mono);font-size:.8125rem;line-height:1.7;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:16px 18px;white-space:pre-wrap;word-break:break-word;color:var(--text-muted)}.lab-code .tok-method{color:var(--accent);font-weight:600}.lab-code .tok-status-ok{color:var(--accent-2);font-weight:600}.lab-code .tok-status-err{color:var(--danger);font-weight:600}.lab-code .tok-key{color:var(--text)}.lab-code .tok-dim{color:var(--text-faint)}.lab-btn-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.lab-btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.8125rem;font-weight:600;letter-spacing:.03em;padding:10px 16px;border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--surface-elevated);color:var(--text);transition:border-color .15s ease,color .15s ease,background .15s 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input:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.lab-node{font-family:var(--font-mono);font-size:.75rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted)}.lab-flow-arrow{color:var(--text-faint);font-size:.75rem}.pill{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:.6875rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;padding:3px 9px;border-radius:999px;border:1px solid var(--border-strong)}.pill-yes{color:var(--accent-2);border-color:var(--accent-2-dim)}.pill-no{color:var(--text-faint)}.pill-conditional{color:var(--accent);border-color:var(--accent-dim)}