:root{--bg:#0a0c10;--bg2:#0e1117;--panel:#131822;--line:#1f2733;--ink:#eef2f8;--dim:#98a4b8;--faint:#5d6a80;--accent:#e8985a;--accent2:#c97a3d;--good:#4cc38a;--amber:#e5b458;--copper:#d9a066}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.wrap{max-width:860px;margin:0 auto;padding-inline:24px}
header.nav{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px 16px;padding-block:22px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--ink)}
.logo:hover{text-decoration:none}
nav.top a{color:var(--dim);margin-left:22px;font-size:14px}
nav.top a[aria-current]{color:var(--ink)}
.crumbs{font-size:13px;color:var(--faint);margin-top:28px}
.crumbs a{color:var(--dim)}
h1{font-size:clamp(32px,5vw,46px);line-height:1.1;letter-spacing:-.02em;font-weight:760;margin-top:10px;text-wrap:balance}
.lede{color:var(--dim);font-size:18px;max-width:38em;margin-top:14px}
.meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.chip{font-size:12.5px;letter-spacing:.03em;color:var(--dim);border:1px solid var(--line);background:var(--panel);border-radius:99px;padding:4px 12px;font-variant-numeric:tabular-nums}
.chip b{color:var(--ink);font-weight:600}
h2{font-size:24px;letter-spacing:-.01em;margin-top:56px;padding-top:8px;text-wrap:balance}
h2 .n{color:var(--faint);font-weight:500;margin-right:8px;font-variant-numeric:tabular-nums}
h3{font-size:17px;margin-top:28px}
p{margin-top:12px;max-width:65ch}
.dim{color:var(--dim)}
.table{overflow-x:auto;margin-top:18px;border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;font-size:14.5px}
th,td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);font-weight:600;background:var(--bg2)}
tr:last-child td{border-bottom:0}
td code{white-space:nowrap}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
code,kbd{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em;background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:1px 6px;color:var(--copper)}
ol.steps{list-style:none;counter-reset:s;margin-top:18px;display:grid;grid-template-columns:minmax(0,1fr);gap:14px}
ol.steps>li{counter-increment:s;display:grid;grid-template-columns:40px minmax(0,1fr);gap:4px 14px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 18px}
ol.steps>li::before{content:counter(s);grid-row:span 2;width:30px;height:30px;border-radius:99px;display:grid;place-items:center;font-weight:700;font-size:14px;color:#1a1008;background:linear-gradient(180deg,var(--accent),var(--accent2));font-variant-numeric:tabular-nums}
ol.steps b.t{display:block;font-size:16px}
ol.steps p{margin-top:2px;color:var(--dim)}
.note{margin-top:18px;border-left:3px solid var(--amber);background:#17140c;padding:12px 16px;border-radius:0 10px 10px 0;color:#e9dcc0;font-size:15px}
.note b{color:#ffe7b0}
ul.gaps{margin-top:14px;padding-left:20px;display:grid;gap:8px}
ul.gaps li::marker{color:var(--amber)}
figure{margin-top:20px;background:var(--bg2);border:1px solid var(--line);border-radius:14px;padding:18px}
figure svg{display:block;width:100%;height:auto}
figure img{display:block;width:100%;max-width:100%;height:auto;border-radius:10px}
figcaption{font-size:13px;color:var(--faint);margin-top:10px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin-top:28px}
.card{display:block;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px;color:var(--ink)}
.card:hover{text-decoration:none;border-color:#3d3226}
.card .k{font-size:12px;letter-spacing:.07em;text-transform:uppercase;color:var(--accent)}
.card h3{margin-top:8px}
.card p{color:var(--dim);font-size:14.5px;margin-top:6px}
footer{padding-block:56px 48px;color:var(--faint);font-size:13px;border-top:1px solid var(--line);margin-top:72px}
@media (max-width:520px){nav.top a{margin-left:14px}ol.steps>li{grid-template-columns:minmax(0,1fr)}ol.steps>li::before{grid-row:auto}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
ol.steps figure{grid-column:1/-1;margin:14px -18px -16px;padding:0;border:0;border-top:1px solid var(--line);border-radius:0 0 11px 11px;overflow:hidden;background:var(--bg2)}
ol.steps figure img{border-radius:0}
ol.steps figcaption{padding:10px 18px 12px;margin-top:0}


/* learning path */
.pathintro{color:var(--dim);font-size:15px;max-width:44em;margin-top:10px}
.pathintro b{color:var(--ink)}
ol.path{list-style:none;margin-top:36px;position:relative;display:grid;gap:14px;padding-left:0}
ol.path::before{content:"";position:absolute;left:21px;top:28px;bottom:28px;width:2px;background:var(--line)}
ol.path>li{position:relative}
ol.path a.node{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:16px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 20px;color:var(--ink);position:relative}
ol.path a.node:hover{text-decoration:none;border-color:#3d3226}
ol.path .n{width:34px;height:34px;border-radius:99px;display:grid;place-items:center;font-weight:750;font-size:15px;color:#1a1008;background:linear-gradient(180deg,var(--accent),var(--accent2));font-variant-numeric:tabular-nums;position:relative;z-index:1}
ol.path .k{font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:2px}
ol.path h3{font-size:17px;margin:0}
ol.path p{color:var(--dim);font-size:14px;margin-top:3px;max-width:none}
ol.path .go{color:var(--faint);font-size:20px}
ol.path a.node:hover .go{color:var(--accent)}
.path-after{color:var(--faint);font-size:13.5px;margin-top:26px;max-width:46em}

/* annotated figure */
figure.anno .shotwrap{position:relative;display:block}
figure.anno .tag{position:absolute;width:26px;height:26px;border-radius:99px;display:grid;place-items:center;font-weight:750;font-size:13px;color:#1a1008;background:var(--amber);border:2px solid #0a0c10;box-shadow:0 2px 10px rgba(0,0,0,.5)}
figure.anno figcaption b{color:var(--amber)}

/* prev / next journey navigation */
nav.pathnav{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center;margin-top:64px;border-top:1px solid var(--line);padding-top:22px;font-size:14.5px}
nav.pathnav .ppos{color:var(--faint);font-size:12.5px;letter-spacing:.06em;text-transform:uppercase}
nav.pathnav a{display:block}
nav.pathnav a.next{text-align:right}
nav.pathnav a small{display:block;color:var(--faint);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;margin-bottom:2px}
@media (max-width:520px){ol.path a.node{grid-template-columns:36px minmax(0,1fr)}ol.path .go{display:none}ol.path::before{left:17px}}

.why{margin-top:12px;border-left:3px solid var(--good);background:#0e1812;padding:11px 15px;border-radius:0 10px 10px 0;font-size:14px;line-height:1.6;color:#c8dfd0}
.why b{color:#9fe8bd}
.why code{background:#15241b;border-color:#24402f;color:#b9e9c9}
ol.steps .why{grid-column:2}
@media (max-width:520px){ol.steps .why{grid-column:1}}

figure img{max-width:100%;width:auto;margin:0 auto}
figure.wide img{width:100%}