:root{--bg: #0b0e14;--panel: #11151d;--panel-2: #161b26;--line: #232938;--text: #e6edf3;--muted: #8b949e;--faint: #5c6570;--polygon: #9a6bff;--celo: #35d07f;--gold: #f0b429;--warn: #f0883e;--max: 46rem;--sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace}*{box-sizing:border-box}html{scroll-padding-top:4rem}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:18px;line-height:1.7;-webkit-font-smoothing:antialiased}a{color:#7adcdf;text-underline-offset:.2em}a:hover{color:#a9eef0}p{margin:0 0 1.15em}::selection{background:#9a6bff59}#progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--polygon),var(--celo));z-index:50;transition:width .1s linear}#langswitch{position:fixed;top:1.1rem;right:1.5rem;z-index:45;display:flex;align-items:center;gap:.5rem;font-family:var(--mono);font-size:13px;letter-spacing:.08em;border:1px solid var(--line);border-radius:999px;padding:.3rem .85rem;background:#0b0e14b3;backdrop-filter:blur(6px)}#langswitch a{color:var(--faint);text-decoration:none}#langswitch a:hover{color:var(--text)}#langswitch a[aria-current=true]{color:var(--text);font-weight:700}#langswitch .sep{color:var(--faint)}#sidenav{position:fixed;left:1.75rem;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:.35rem;z-index:40}#sidenav a{display:flex;align-items:center;gap:.6rem;color:var(--faint);text-decoration:none;font-size:14px;padding:.25rem .5rem;border-radius:8px;border-left:2px solid transparent;transition:color .15s ease,border-color .15s ease,background-color .15s ease}#sidenav a .num{font-family:var(--mono);font-size:12px;opacity:.7}#sidenav a:hover{color:var(--text);background:#ffffff08}#sidenav a.active{color:var(--text);border-left-color:var(--celo);background:#35d07f0f}@media(max-width:1240px){#sidenav{display:none}}.hero{min-height:100svh;display:flex;flex-direction:column;justify-content:center;padding:5rem 1.5rem 4rem;text-align:center;position:relative;overflow:hidden;background:radial-gradient(700px 360px at 18% 8%,rgba(154,107,255,.16),transparent 60%),radial-gradient(700px 360px at 82% 92%,rgba(53,208,127,.13),transparent 60%),var(--bg)}.eyebrow{display:inline-flex;align-items:center;gap:.5rem;margin:0 auto 1.5rem;font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:.35rem 1rem;background:#ffffff05}.eyebrow .dot-p{width:8px;height:8px;border-radius:50%;background:var(--polygon)}.eyebrow .dot-c{width:8px;height:8px;border-radius:50%;background:var(--celo)}.hero h1{font-size:clamp(34px,6vw,58px);line-height:1.12;margin:0 auto 1.25rem;letter-spacing:-.02em}.hero h1 .big{background:linear-gradient(90deg,var(--polygon),var(--celo));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero .sub{color:var(--muted);max-width:38rem;margin:0 auto 2.5rem;font-size:20px}.hero-stats{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center;margin:0}.stat-chip{display:flex;flex-direction:column-reverse;border:1px solid var(--line);background:var(--panel);border-radius:12px;padding:.6rem 1.1rem;text-align:left}.stat-chip .v{display:block;margin:0;font-family:var(--mono);font-weight:700;font-size:18px}.stat-chip .k{display:block;font-size:13px;color:var(--faint);text-transform:uppercase;letter-spacing:.08em}.scroll-hint{position:absolute;bottom:1.4rem;left:50%;transform:translate(-50%);color:var(--faint);font-size:14px;animation:float 2.2s ease-in-out infinite}@keyframes float{0%,to{transform:translate(-50%)}50%{transform:translate(-50%,7px)}}@media(prefers-reduced-motion:reduce){.scroll-hint{animation:none}}main{max-width:var(--max);margin:0 auto;padding:0 1.5rem 6rem}.chapter{padding-top:6rem}.ch-label{display:flex;align-items:center;gap:.75rem;font-family:var(--mono);font-size:14px;color:var(--faint);text-transform:uppercase;letter-spacing:.15em;margin:0 0 1rem}.ch-label:after{content:"";flex:1;height:1px;background:linear-gradient(90deg,var(--line),transparent)}.chapter h2{font-size:clamp(28px,4vw,36px);line-height:1.2;margin:0 0 1.5rem;letter-spacing:-.01em}.chapter h3{font-size:20px;margin:2rem 0 .75rem}.lead{font-size:20px}.muted{color:var(--muted)}.accent-p{color:var(--polygon);font-weight:600}.accent-c{color:var(--celo);font-weight:600}.accent-g{color:var(--gold);font-weight:600}.bignum{margin:2.2rem 0;text-align:center}.bignum .n{font-family:var(--mono);font-weight:800;font-size:clamp(2.4rem,8vw,4.2rem);letter-spacing:-.03em;line-height:1;display:block}.bignum .n.p{color:var(--polygon)}.bignum .n.c{color:var(--celo)}.bignum .n.g{background:linear-gradient(90deg,var(--polygon),var(--celo));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.bignum .d{color:var(--muted);font-size:16px;margin-top:.5rem;display:block}.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:1.4rem 1.5rem;margin:1.5rem 0}.card h4{margin:0 0 .6rem;font-size:13px;text-transform:uppercase;letter-spacing:.12em;color:var(--muted)}.duo{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:1.5rem 0}.duo .card{margin:0}.duo .card.pol{border-top:3px solid var(--polygon)}.duo .card.cel{border-top:3px solid var(--celo)}.duo .big{font-family:var(--mono);font-size:28px;font-weight:800;display:block;margin-bottom:.25rem}.duo .pol .big{color:var(--polygon)}.duo .cel .big{color:var(--celo)}.duo .small{font-size:16px;color:var(--muted)}.tbl{width:100%;border-collapse:collapse;font-size:16px;margin:1.25rem 0}.tbl th{text-align:left;color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.08em;padding:.55rem .75rem;border-bottom:1px solid var(--line)}.tbl td{padding:.55rem .75rem;border-bottom:1px solid var(--line)}.tbl tr:last-child td{border-bottom:none}.tbl td:not(:first-child),.tbl th:not(:first-child){text-align:right;font-variant-numeric:tabular-nums}.tbl .mono{font-family:var(--mono)}.tbl .hl td{background:#f0b42912}figure.chart{width:min(1040px,calc(100vw - 3rem));margin:3rem 0 3rem calc((100% - min(1040px,100vw - 3rem))/2)}figure.chart svg{display:block;width:100%;height:auto}figure.chart figcaption{padding:.5rem 1.5rem 0;font-size:14px;color:var(--faint);text-align:center}figure.quote{border-left:3px solid var(--gold);padding:.25rem 0 .25rem 1.25rem;margin:1.75rem 0;color:var(--text);font-size:20px;font-style:italic}figure.quote blockquote{margin:0}figure.quote blockquote p{margin:0}figure.quote .who{display:block;margin-top:.5rem;font-style:normal;font-size:14px;color:var(--muted)}figure.quote .who cite{font-style:normal}.note{background:#9a6bff12;border:1px solid rgba(154,107,255,.25);border-radius:12px;padding:1rem 1.25rem;margin:1.5rem 0;font-size:16px}.note.green{background:#35d07f0f;border-color:#35d07f40}.note.gold{background:#f0b4290f;border-color:#f0b4294d}.note strong{color:var(--text)}.note>p:last-child{margin-bottom:0}.steps{counter-reset:step;margin:1.75rem 0;padding:0;list-style:none;display:grid;gap:.9rem}.steps li{counter-increment:step;display:flex;gap:1rem;align-items:flex-start;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:1rem 1.2rem}.steps li:before{content:counter(step);flex:0 0 auto;width:2rem;height:2rem;border-radius:50%;display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:15px;background:linear-gradient(135deg,var(--polygon),var(--celo));color:#0b0e14}.steps strong{display:block}.steps .s-d{font-size:16px;color:var(--muted)}.checks{display:grid;grid-template-columns:1fr 1fr;gap:.6rem;margin:1.5rem 0;padding:0;list-style:none}.check{display:flex;gap:.6rem;align-items:flex-start;font-size:16px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:.7rem .9rem}.check .ok{color:var(--celo);font-weight:700;flex:0 0 auto}details.gl{border:1px solid var(--line);border-radius:10px;background:var(--panel);margin:.5rem 0}details.gl summary{cursor:pointer;padding:.8rem 1.1rem;font-weight:600;list-style:none;display:flex;align-items:center}details.gl summary::-webkit-details-marker{display:none}details.gl summary:after{content:"+";margin-left:auto;color:var(--faint);font-family:var(--mono);font-size:18px}details.gl[open] summary:after{content:"–"}details.gl .gl-body{padding:0 1.1rem .9rem;color:var(--muted);font-size:16px}.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}.reveal.visible{opacity:1;transform:none}@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}footer.site{border-top:1px solid var(--line);margin-top:5rem;padding:2.5rem 1.5rem 3rem;text-align:center;color:var(--muted);font-size:14px}footer.site .links{display:flex;flex-wrap:wrap;gap:1.25rem;justify-content:center;margin-bottom:1.25rem}footer.site .credit{margin:0}.repro{background:#0d1626;border:1px solid #1f2c44;border-radius:12px;padding:1rem 1.25rem;font-family:var(--mono);font-size:14px;text-align:left;white-space:pre;line-height:1.8;overflow-x:auto;margin:1.5rem 0;color:#d6e0f5}.repro .c{color:#5b6a90}@media(max-width:40rem){.duo,.checks{grid-template-columns:1fr}}