:root{color-scheme:dark;--bg:#07080c;--surface:#0e1016;--raised:#151824;--line:#232738;--text:#e9ebf3;--muted:#9097ad;--accent:#a78bfa;--accent-strong:#c4b5fd;--accent-ink:#0a0b12;--glow:color-mix(in srgb, var(--accent) 38%, transparent);--ok:#3ddc97;--bad:#ff6b81;--warn:#ffc857;--radius:14px;--radius-sm:8px;--font:ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;--mono:ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;--measure:56rem;--wide:1120px}:root[data-theme=light]{color-scheme:light;--bg:#fbfbfe;--surface:#fff;--raised:#f1f2f9;--line:#dde0ee;--text:#13162a;--muted:#565d76;--accent:#6d28d9;--accent-strong:#5b21b6;--accent-ink:#fff;--ok:#0e9f63;--bad:#d6314b;--warn:#b7791f}@view-transition{navigation:auto}::view-transition-old(root),::view-transition-new(root){animation-duration:.14s}.top{view-transition-name:site-header}@media 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20px;display:flex}.brand{letter-spacing:-.02em;flex:none;align-items:center;gap:10px;font-weight:700;display:inline-flex;color:var(--text)!important;text-decoration:none!important}.brand svg{width:26px;height:26px}.nav{scrollbar-width:none;align-items:center;gap:2px;min-width:0;margin-left:8px;display:flex;overflow-x:auto}.nav::-webkit-scrollbar{display:none}.nav a{color:var(--muted);white-space:nowrap;border-radius:999px;padding:6px 12px;font-size:14.5px;text-decoration:none}.nav a:hover,.nav a[aria-current=page]{color:var(--text);background:var(--raised)}.top .spacer{flex:1}.icon-btn{border:1px solid var(--line);width:36px;height:36px;color:var(--muted);cursor:pointer;background:0 0;border-radius:999px;place-items:center;display:inline-grid}.icon-btn:hover{color:var(--text);background:var(--raised)}.icon-btn svg{width:18px;height:18px}main.site-main{flex:1}.wrap{max-width:var(--wide);margin:0 auto;padding:0 20px}section.block{padding:56px 0}section.block+section.block{padding-top:0}section.block .wrap>h2.title:not(:first-child){margin-top:48px}section.block .wrap>:last-child{margin-bottom:0}.eyebrow{font:600 12px / 1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--accent-strong);display:inline-block}h1.display{letter-spacing:-.04em;text-wrap:balance;margin:14px 0 0;font-size:clamp(2.3rem,6.2vw,4.4rem);font-weight:750;line-height:1.04}h2.title{letter-spacing:-.03em;text-wrap:balance;margin:0 0 12px;font-size:clamp(1.5rem,3.4vw,2.1rem);line-height:1.15}.lede{max-width:var(--measure);color:var(--muted);text-wrap:pretty;margin:18px 0 0;font-size:clamp(1.05rem,2vw,1.25rem);line-height:1.55}.prose{max-width:var(--measure)}.prose p{text-wrap:pretty;color:color-mix(in srgb, var(--text) 86%, var(--muted));margin:0 0 1em}.prose h3{letter-spacing:-.015em;margin:1.6em 0 .5em;font-size:1.15rem}.prose code,.lede code{font:.88em var(--mono);background:var(--raised);border:1px solid var(--line);border-radius:6px;padding:.15em .4em}.hero{isolation:isolate;padding:clamp(48px,9vw,112px) 0 clamp(40px,7vw,80px);position:relative;overflow:clip}.hero:before{content:"";z-index:-1;background:radial-gradient(40% 55% at 22% 20%, var(--glow), transparent 70%), radial-gradient(34% 50% at 78% 10%, #38e1c138, transparent 70%);filter:blur(8px);opacity:.85;height:90%;position:absolute;inset:-20% -10% auto}.hero-actions{flex-wrap:wrap;gap:12px;margin-top:28px;display:flex}.btn{border:1px solid var(--line);background:var(--raised);min-height:44px;font:600 15px / 1 var(--font);cursor:pointer;border-radius:999px;align-items:center;gap:8px;padding:0 20px;display:inline-flex;color:var(--text)!important;text-decoration:none!important}.btn:hover{border-color:color-mix(in srgb, var(--accent) 50%, var(--line))}.btn.primary{background:var(--accent);border-color:var(--accent);box-shadow:0 8px 30px -8px var(--glow);color:var(--accent-ink)!important}.btn.primary:hover{background:var(--accent-strong)}.tiles{grid-template-columns:repeat(2,1fr);gap:14px;margin-top:28px;display:grid}.tile{border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(180deg, var(--surface), color-mix(in srgb, var(--surface) 70%, var(--bg)));flex-direction:column;gap:10px;padding:22px;transition:transform .16s,border-color .16s,box-shadow .16s;display:flex;color:var(--text)!important;text-decoration:none!important}.tile:hover{border-color:color-mix(in srgb, var(--accent) 55%, var(--line));box-shadow:0 18px 50px -24px var(--glow);transform:translateY(-3px)}.tile .num{font:600 12px / 1 var(--mono);letter-spacing:.12em;color:var(--accent-strong)}.tile h3{letter-spacing:-.025em;margin:0;font-size:1.35rem}.tile p{color:var(--muted);margin:0;font-size:15px;line-height:1.55}.tile .go{color:var(--accent-strong);margin-top:auto;padding-top:8px;font-size:14px;font-weight:600}@media (width>=1100px){.tiles{grid-template-columns:repeat(4,1fr)}}@media (prefers-reduced-motion:reduce){.tile{transition:none}.tile:hover{transform:none}}.demo{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);margin:28px 0;overflow:clip}.demo-bar{border-bottom:1px solid var(--line);background:var(--raised);color:var(--muted);flex-wrap:wrap;align-items:center;gap:10px 14px;padding:10px 16px;font-size:13.5px;display:flex}.demo-bar .dots{gap:6px;display:inline-flex}.demo-bar .dots i{background:var(--line);border-radius:50%;width:10px;height:10px}.demo-bar .grow{flex:1}.demo-body{padding:20px}.chip{border:1px solid var(--line);font:600 12px / 1.4 var(--mono);color:var(--muted);border-radius:999px;align-items:center;gap:6px;padding:3px 10px;display:inline-flex}.run,.site button[data-specbook-try],.site button[data-specbook-flow]{border:1px solid color-mix(in srgb, var(--accent) 60%, var(--line));background:color-mix(in srgb, var(--accent) 14%, var(--surface));min-height:44px;color:var(--accent-strong);font:600 14.5px / 1 var(--font);cursor:pointer;border-radius:999px;align-items:center;gap:8px;padding:0 18px;text-decoration:none;display:inline-flex}.run:hover,.site button[data-specbook-try]:hover,.site button[data-specbook-flow]:hover{background:color-mix(in srgb, var(--accent) 24%, var(--surface))}.site .expressive-code{max-width:100%;margin:18px 0}ol.steps{counter-reset:step;gap:14px;margin:24px 0;padding:0;list-style:none;display:grid}ol.steps li{counter-increment:step;min-height:34px;padding-left:48px;position:relative}ol.steps li:before{content:counter(step);background:var(--raised);border:1px solid var(--line);width:34px;height:34px;font:700 14px / 1 var(--mono);color:var(--accent-strong);border-radius:50%;place-items:center;display:grid;position:absolute;top:0;left:0}.next{border-top:1px solid var(--line);justify-content:space-between;gap:16px;margin:56px 0 0;padding-top:28px;display:flex}.next a{gap:4px;display:grid;color:var(--text)!important;text-decoration:none!important}.next small{font:600 11px / 1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}.next .right{text-align:right;margin-left:auto}.foot{border-top:1px solid var(--line);color:var(--muted);padding:28px 0 40px;font-size:14px}.foot-in{flex-wrap:wrap;justify-content:space-between;gap:12px 28px;display:flex}.foot a{color:var(--muted)}@media (width<=820px){.tiles{grid-template-columns:1fr}.top-in{gap:12px}.nav{margin-left:0}section.block{padding:40px 0}.demo-body{padding:16px}}specbook-play,specbook-panel{--sb-accent:var(--accent);--sb-accent-hover:var(--accent-strong);--sb-text-on-accent:var(--accent-ink);--sb-font-sans:var(--font);--sb-font-mono:var(--mono)}.term{border:1px solid var(--line);color:#d8dae3;background:#0b0b10;border-radius:12px;max-width:100%;margin:18px 0;overflow:hidden}.term-bar,.term-chaos,.term-foot{flex-wrap:wrap;align-items:center;gap:8px;padding:10px 14px;display:flex}.term-bar{border-bottom:1px solid #23232e}.term-cmd{font:13px / 1.4 var(--mono);color:#b9bccb;overflow-wrap:anywhere}.term-chaos{border-bottom:1px solid #23232e}.term .chip.action{color:#d8dae3;cursor:pointer;background:#181822;border-color:#3a3a4d}.term .chip.action:hover:not(:disabled){border-color:var(--accent)}.term .chip.action:disabled{cursor:default}.term-chaos .chip.on{border-color:var(--accent);background:color-mix(in srgb, var(--accent) 24%, #181822);color:#fff}.term-note{color:#9a9db0;font-size:13px}.term-out{height:340px;font:13px / 1.55 var(--mono);white-space:pre-wrap;overflow-wrap:anywhere;scrollbar-width:thin;scrollbar-color:#3a3a4d transparent;margin:0;padding:14px;overflow:auto}.term-foot .btn{justify-content:center;min-width:112px}.term-out:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.a-b{font-weight:700}.a-d{opacity:.6}.a-red{color:#ff7a85}.a-green{color:#5fd38d}.a-yellow{color:#f1c75a}.a-cyan{color:#6fd0e6}.term-foot{border-top:1px solid #23232e}.term-chaos{border:0;min-width:0;margin:0}.sr-only{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}