:root{--fg:#1d232a;--mut:#5b6670;--bg:#fbfcfb;--card:#fff;--ac:#0b6e5f;--ac-soft:#e6f2ef;--line:#dfe5e2;--box:#f1f4f2;--warn:#fff7e0;--warn-line:#e3c35a;--codebg:#1b2126;--codefg:#e6ece9;
--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;--sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
@media (prefers-color-scheme:dark){:root{--fg:#e3e8e6;--mut:#9aa6a1;--bg:#14181b;--card:#1b2024;--ac:#4fc1a6;--ac-soft:#1d2e2a;--line:#2c3439;--box:#20272b;--warn:#2d2816;--warn-line:#8a7425;--codebg:#0e1113}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:17px/1.7 var(--sans);color:var(--fg);background:var(--bg)}
.wrap,main{max-width:740px;margin:0 auto;padding:0 1.15rem}
a{color:var(--ac);text-underline-offset:.18em}a:hover{text-decoration-thickness:2px}
a:focus-visible{outline:2px solid var(--ac);outline-offset:2px;border-radius:2px}
.site-header{border-bottom:1px solid var(--line);background:var(--card)}
.site-header .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.4rem 1.2rem;padding-top:.9rem;padding-bottom:.9rem}
.logo{font:700 1.08rem var(--mono);color:var(--fg);text-decoration:none;letter-spacing:-.01em}
.logo .prompt{color:var(--ac)}.logo .cursor{color:var(--ac);margin-left:1px}
.nav{display:flex;flex-wrap:wrap;gap:.2rem .95rem;font:.88rem var(--mono)}
.nav a{color:var(--mut);text-decoration:none}.nav a:hover{color:var(--ac)}
main{padding-top:.5rem;padding-bottom:2rem}
h1,h2,h3,h4{line-height:1.25;letter-spacing:-.01em}
h1{font-size:2rem;margin:1.2rem 0 1rem}
h2{font-size:1.4rem;margin:2.3rem 0 .8rem;padding-bottom:.3rem;border-bottom:1px solid var(--line)}
h2::before{content:"## ";font-family:var(--mono);color:var(--ac);font-size:.85em;opacity:.7}
h3{font-size:1.15rem;margin:1.8rem 0 .6rem}
p,ul,ol{margin:0 0 1.05rem}li{margin:.25rem 0}
.crumbs{font:.82rem var(--mono);color:var(--mut);margin-top:1.2rem}.crumbs a{color:var(--mut)}
ul.cards{list-style:none;padding:0;display:grid;gap:.6rem}
ul.cards li{margin:0;background:var(--card);border:1px solid var(--line);border-left:3px solid var(--ac);border-radius:6px;padding:.65rem .9rem}
ul.cards li a{font-weight:600;text-decoration:none}ul.cards li a:hover{text-decoration:underline}
code{font-family:var(--mono);font-size:.88em}
:not(pre)>code{background:var(--box);border:1px solid var(--line);padding:.05em .3em;border-radius:4px}
pre{background:var(--codebg);color:var(--codefg);padding:.95rem 1.1rem;overflow:auto;border-radius:8px;font-size:.86rem;line-height:1.55;margin:0 0 1.2rem}
pre code{font-size:inherit}
blockquote{margin:1.2rem 0;padding:.7rem 1.1rem;background:var(--ac-soft);border-left:4px solid var(--ac);border-radius:0 6px 6px 0}
blockquote>:last-child{margin-bottom:0}
.note{background:var(--warn);border:1px solid var(--warn-line);border-left-width:4px;padding:.7rem 1rem;border-radius:6px;font-size:.95rem}
.aff{display:inline-block;background:var(--box);border:1px dashed var(--mut);padding:.05rem .4rem;font:.85rem var(--mono);border-radius:4px}
.tbl{overflow-x:auto;margin:1.2rem 0;border:1px solid var(--line);border-radius:6px}
table{border-collapse:collapse;width:100%;font-size:.92rem}
th,td{border-bottom:1px solid var(--line);padding:.5rem .65rem;text-align:left;vertical-align:top}
th{background:var(--box);font-weight:600}tbody tr:last-child td{border-bottom:0}
.todo{background:#ffe0e0;border:1px solid #d33;color:#900;padding:.1rem .4rem}
.site-footer{border-top:1px solid var(--line);margin-top:3rem;font-size:.88rem;color:var(--mut);background:var(--card)}
.site-footer .wrap{padding-top:1.2rem;padding-bottom:1.4rem}
.site-footer nav{display:flex;flex-wrap:wrap;gap:.3rem 1.1rem;margin-bottom:.4rem}.site-footer a{color:var(--mut)}
.site-footer p{margin:0;font-family:var(--mono);font-size:.8rem}
@media (max-width:560px){body{font-size:16px}h1{font-size:1.6rem}h2{font-size:1.25rem}.site-header .wrap{flex-direction:column;align-items:flex-start}}
/* design pass 2 */
.wrap,main{max-width:1000px}
main>p,main>ul:not(.cards),main>ol:not(.steps),main>h2:not(.sec),main>h3,main>.code,main>blockquote,main>.tbl,main>.note,main>.toc,main>.title-block{max-width:740px}
.logo{display:inline-flex;align-items:center;gap:.5rem;font:700 1.15rem var(--sans)}.logo b{color:var(--ac);font-weight:700}
@media (prefers-color-scheme:dark){.logo-ico{filter:brightness(1.45)}}
.ico{width:1.35em;height:1.35em;color:var(--ac);flex:none;vertical-align:-.25em}
.hero{padding:2.6rem 0 1.4rem;border-bottom:1px solid var(--line)}
.hero h1{font-size:2.4rem;margin:0 0 .6rem;max-width:22ch}.lead{font-size:1.15rem;color:var(--mut);max-width:60ch}
.cta{display:flex;flex-wrap:wrap;gap:.6rem}
.btn{display:inline-block;background:var(--ac);color:#fff;font-weight:600;padding:.6rem 1.1rem;border-radius:8px;text-decoration:none}
@media (prefers-color-scheme:dark){.btn{color:#0e1113}}
.btn2{background:transparent;color:var(--ac);border:1.5px solid var(--ac)}
h2.sec{display:flex;align-items:center;gap:.5rem;border:0}h2.sec::before{content:none}
ul.cards{grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:.9rem}
ul.cards li{display:flex;gap:.75rem;align-items:flex-start;border-left:1px solid var(--line);border-radius:10px;padding:1rem}
ul.cards li:hover{border-color:var(--ac)}ul.cards li .ico{width:1.7rem;height:1.7rem;padding:.3rem;background:var(--ac-soft);border-radius:8px;box-sizing:content-box}
ul.cards li a{display:block;line-height:1.35}.tag{display:inline-block;margin-top:.4rem;font:.75rem var(--mono);color:var(--mut);background:var(--box);padding:.05rem .45rem;border-radius:4px}
ol.steps{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:.9rem;counter-reset:none}
ol.steps li{display:flex;gap:.8rem;margin:0;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1rem}
.num{flex:none;width:2rem;height:2rem;border-radius:50%;background:var(--ac);color:#fff;display:grid;place-items:center;font:700 .95rem var(--mono)}
@media (prefers-color-scheme:dark){.num{color:#0e1113}}
ol.steps h3{margin:.1rem 0 .3rem;font-size:1.05rem;display:flex;gap:.4rem;align-items:center}ol.steps p{margin:0 0 .4rem;font-size:.93rem;color:var(--mut)}
.step-links{font-weight:600}.step-opt{font-size:.93rem;color:var(--mut)}
.title-block{display:flex;gap:1rem;align-items:center;margin:1.2rem 0 1rem}.title-block h1{margin:0}
.badge{flex:none;display:grid;place-items:center;width:3.2rem;height:3.2rem;border-radius:12px;background:var(--ac-soft)}.badge .ico{width:1.8rem;height:1.8rem}
.meta{margin:.3rem 0 0;font:.82rem var(--mono);color:var(--mut)}
.toc{background:var(--box);border:1px solid var(--line);border-radius:8px;padding:.8rem 1.1rem;margin:1.2rem 0;font-size:.93rem}.toc ol{margin:.4rem 0 0;padding-left:1.3rem}.toc li{margin:.1rem 0}
.note{position:relative;padding-left:1rem}
.code{margin:0 0 1.2rem;border-radius:8px;overflow:hidden;border:1px solid var(--line)}
.code-lab{background:#262e34;color:#a9b6b0;font:.75rem var(--mono);padding:.3rem 1.1rem;text-transform:lowercase}
.code pre{margin:0;border-radius:0}pre{tab-size:2;white-space:pre}
@media (max-width:560px){.hero h1{font-size:1.8rem}.title-block{align-items:flex-start}.badge{width:2.6rem;height:2.6rem}}

/* visual pass 3 */
.logo{font-size:1.25rem;gap:.6rem}.logo-ico{width:36px;height:36px;flex:none}
.hero{display:grid;grid-template-columns:1fr minmax(240px,340px);gap:2rem;align-items:center}
.hero-art{width:100%;height:auto;max-height:250px}
.cbadge{flex:none;display:grid;place-items:center;width:46px;height:46px;border-radius:12px;background:var(--ac-soft)}
ul.cards li .cbadge .ico{width:26px;height:26px;padding:0;background:none}
.badge{width:4.2rem;height:4.2rem;border-radius:16px;border:1px solid var(--line)}.badge .ico{width:2.4rem;height:2.4rem}
.sico{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--ac-soft);flex:none}.sico .ico{width:18px;height:18px}
@media (max-width:760px){.hero{grid-template-columns:1fr}.hero-art{display:none}}
@media (max-width:560px){.logo-ico{width:32px;height:32px}.cbadge{width:40px;height:40px}.badge{width:3.2rem;height:3.2rem}.badge .ico{width:1.9rem;height:1.9rem}}