*{box-sizing:border-box}
body{margin:0;background:#fff;color:#1f2a1f;font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:#2f6b2f}
.top{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:8px 16px;font-size:13px;background:#f4f7ee;border-bottom:1px solid #dfe6d2}
.top a{color:#4a5a3a;text-decoration:none}
.lang{display:inline-flex;align-items:center;gap:6px;border:1px solid #c9d4b8;border-radius:6px;padding:2px 8px;background:#fff}
.lang svg{width:22px;height:15px;display:block}
header.h{padding:16px 16px 4px;max-width:46rem;margin:0 auto}
header.h .brand{font-size:13px;color:#6b7a5a;text-transform:uppercase;letter-spacing:.06em}
main{max-width:46rem;margin:0 auto;padding:4px 16px 32px}
h1{font-size:1.7rem;line-height:1.25;margin:.3em 0}
h2{font-size:1.2rem;margin:1.6em 0 .4em;color:#2f4a1f}
.goal{background:#eef5e2;border-left:4px solid #6a9a3a;padding:10px 14px;border-radius:4px;margin:12px 0}
.try{background:#fff8e6;border-left:4px solid #d9a21b;padding:10px 14px;border-radius:4px;margin:20px 0}
.learn{background:#eef3fb;border-left:4px solid #4a78b8;padding:10px 14px;border-radius:4px;margin:20px 0}
.try h2,.learn h2{margin-top:0;font-size:1.05rem}
.analogy{font-style:italic;color:#44503a}
pre{background:#f6f6f2;border:1px solid #e0e0d4;border-radius:6px;padding:12px;overflow-x:auto;font:13.5px/1.5 ui-monospace,Menlo,Consolas,monospace}
code{font:0.92em ui-monospace,Menlo,Consolas,monospace;background:#f1f1ea;padding:1px 4px;border-radius:3px;word-break:break-word}
pre code{background:none;padding:0}
.tw{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:15px;min-width:34rem}
th,td{border:1px solid #d6dcc8;padding:6px 8px;text-align:left;vertical-align:top}
th{background:#f0f4e6}
svg.fig{width:100%;height:auto;display:block;margin:14px 0}
.hash{word-break:break-all;font:13px ui-monospace,Menlo,Consolas,monospace}
nav.pn{display:flex;justify-content:space-between;gap:12px;margin:28px 0 0;flex-wrap:wrap}
nav.pn a{padding:8px 12px;border:1px solid #c9d4b8;border-radius:6px;text-decoration:none}
ul.toc{padding-left:0;list-style:none}
ul.toc li{margin:8px 0;padding:10px 12px;border:1px solid #dfe6d2;border-radius:6px}
footer{border-top:1px solid #dfe6d2;background:#f4f7ee;padding:14px 16px;font-size:13px;color:#4a5a3a;text-align:center}
.red{display:inline-block;background:#b3261e;color:#fff;font-weight:700;padding:2px 10px;border-radius:4px}
.green{display:inline-block;background:#2f7d32;color:#fff;font-weight:700;padding:2px 10px;border-radius:4px}
@media(min-width:700px){body{font-size:18px}h1{font-size:2.1rem}}
.box{background:#fff8e6;border-left:4px solid #d9a21b;padding:10px 14px;border-radius:4px;margin:16px 0}.box h2{margin-top:0;font-size:1.05rem}.box code{overflow-wrap:anywhere}
@media(max-width:700px){svg.fig{min-width:600px}}

pre.out{background:#f1f6ec;border-color:#d6e2c6}

.concept{background:#0f172a;color:#fff;text-align:center;font-weight:600;font-size:14px;line-height:1.4;padding:8px 12px}.concept b{background:#fbbf24;color:#0f172a;border-radius:4px;padding:1px 7px;margin-right:8px;font-size:12px;text-transform:uppercase}

.stickybar{position:sticky;top:0;z-index:50;background:#fff}.concept{font-size:12px!important;padding:5px 10px!important}@media(min-width:700px){.concept{font-size:14px!important;padding:8px 12px!important}}html{scroll-padding-top:9rem}

.top .coding{margin-left:auto;margin-right:14px;color:#6D28D9;font-weight:700;text-decoration:none}.top .coding:hover{text-decoration:underline}.top .coding span{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.9em}

.top a{display:inline-flex;align-items:center;min-height:40px}.top .lang svg{margin-right:6px}

.codingbox{border:2px solid #6D28D9;background:#f5f3ff;color:#1c2330;border-radius:12px;padding:12px 14px;margin:16px 0;line-height:1.5}.codingbox strong{color:#6D28D9}.codingbox a{display:inline-flex;align-items:center;min-height:44px;margin-left:6px;font-weight:700;color:#6D28D9}

.sitebar{background:#fff;border-bottom:1px solid #e3e7ee}
.sb-in{max-width:72rem;margin:0 auto;padding:6px 14px;display:flex;flex-wrap:wrap;align-items:center;gap:4px 12px}
.sb-brand{display:inline-flex;align-items:center;gap:8px;min-height:44px;font-weight:800;font-size:1.05rem;color:#0f172a;text-decoration:none;margin-right:auto;white-space:nowrap}
.sb-nav{order:3;width:100%;display:flex;gap:2px;overflow-x:auto;justify-content:flex-start;-webkit-overflow-scrolling:touch}
.sb-nav a{display:inline-flex;align-items:center;min-height:40px;padding:0 12px;border-radius:999px;font-size:14px;font-weight:600;color:#334155;text-decoration:none;white-space:nowrap}
.sb-nav a:hover{background:#f1f5f9}
.sb-nav a.sb-tut{color:#6D28D9;background:#f5f3ff;font-weight:800;box-shadow:inset 0 0 0 2px #6D28D9}
.sb-nav a.sb-tut span{font-family:ui-monospace,Menlo,Consolas,monospace;margin-right:5px;font-size:.9em}
.sitebar .sb-lang{order:2;min-height:44px;padding:0 10px;border:2px solid #cbd5e1;border-radius:12px;color:#334155;text-decoration:none;font-size:14px;background:#fff}
.sb-olio .sb-brand{color:#3b4f1b}.sb-olio .sb-nav a{color:#2a3913}.sb-olio .sb-nav a:hover{background:#f4f7ec}.sb-olio .sb-lang{border-color:#d3dfb0;color:#2a3913}
@media(min-width:900px){.sb-in{flex-wrap:nowrap;gap:12px;padding:8px 18px}.sb-nav{order:2;width:auto;overflow:visible}.sitebar .sb-lang{order:3}.sb-brand{font-size:1.2rem;margin-right:12px}.sb-nav{margin-right:auto}}
footer a{color:inherit;text-decoration:underline}

@media(max-width:560px){.sb-nav{gap:0;margin:0 -6px}.sb-nav a{padding:0 7px;font-size:13px}.sb-nav a.sb-tut span{display:none}.sb-nav a.sb-tut{box-shadow:inset 0 0 0 2px #6D28D9}}

@media(max-width:380px){.sb-nav a{padding:0 5px;font-size:12.5px}.sb-in{padding:6px 10px}}

footer a,.xlinks a{display:inline-flex;align-items:center;min-height:44px;padding:0 6px}footer{text-align:center}.xlinks{display:flex;flex-wrap:wrap;justify-content:center;gap:0 6px}