/* pushbike.net — single stylesheet. No webfonts, no external requests (PageSpeed 100). */
:root{
  --ink:#1f2a2e; --muted:#54666a; --teal:#0b6e64; --teal-dark:#08514a;
  --sun:#ffc53d; --bg:#ffffff; --tint:#f2f8f6; --line:#dbe7e3; --amber-bg:#fff8e8;
  --max:76rem; --r:14px;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.65;font-size:1.05rem}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--teal)}
a:hover{color:var(--teal-dark)}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px;border-radius:4px}

/* layout */
.wrap{max-width:var(--max);margin:0 auto;padding:0 1.25rem}
.narrow{max-width:50rem}
main{padding:2.25rem 0 4rem}

/* header + CSS-only nav */
header.site{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:50}
.bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.8rem 1.25rem;max-width:var(--max);margin:0 auto}
.logo{display:flex;align-items:center;gap:.55rem;font-weight:800;font-size:1.25rem;letter-spacing:-.02em;color:var(--ink);text-decoration:none}
.logo .dot{color:var(--teal)}
.logo svg{width:30px;height:30px}
nav.main ul{display:flex;gap:1.4rem;list-style:none;margin:0;padding:0}
nav.main a{text-decoration:none;font-weight:600;font-size:.95rem;color:var(--ink)}
nav.main a:hover{color:var(--teal)}
details.mnav{display:none}
@media(max-width:760px){
  nav.main{display:none}
  details.mnav{display:block;position:relative}
  details.mnav summary{list-style:none;cursor:pointer;font-weight:700;padding:.4rem .7rem;border:1.5px solid var(--line);border-radius:8px}
  details.mnav summary::-webkit-details-marker{display:none}
  details.mnav ul{position:absolute;right:0;top:2.6rem;background:var(--bg);border:1px solid var(--line);border-radius:12px;list-style:none;margin:0;padding:.5rem;min-width:13rem;box-shadow:0 12px 30px rgba(31,42,46,.12)}
  details.mnav a{display:block;padding:.55rem .8rem;text-decoration:none;font-weight:600;color:var(--ink);border-radius:8px}
  details.mnav a:hover{background:var(--tint)}
}

/* type */
h1{font-size:clamp(2rem,4.5vw,3rem);line-height:1.12;letter-spacing:-.025em;margin:.2rem 0 1rem;font-weight:800}
h2{font-size:1.55rem;letter-spacing:-.015em;margin:2.4rem 0 .8rem;font-weight:800}
h3{font-size:1.18rem;margin:1.6rem 0 .5rem;font-weight:700}
.kicker{font-family:var(--mono);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--teal);font-weight:700}
.lede{font-size:1.18rem;color:var(--muted);max-width:44rem}
mark{background:linear-gradient(transparent 62%,var(--sun) 62%);padding:0 .1em}

/* hero */
.hero{background:var(--tint);border-bottom:1px solid var(--line);padding:3.2rem 0 3rem}
.hero .grid{display:grid;grid-template-columns:1.2fr .8fr;gap:2.5rem;align-items:center}
@media(max-width:820px){.hero .grid{grid-template-columns:1fr}}
.hero-art{color:var(--teal)}

/* the signature: tape-measure spec strip */
.spec{font-family:var(--mono);font-size:.82rem;color:var(--muted);border-top:2px dashed var(--line);margin-top:.9rem;padding-top:.6rem;display:flex;flex-wrap:wrap;gap:.35rem 1.1rem}
.spec b{color:var(--ink);font-weight:600}

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(17rem,1fr));gap:1.25rem;margin:1.5rem 0}
.card{border:1.5px solid var(--line);border-radius:var(--r);padding:1.35rem;background:var(--bg);display:flex;flex-direction:column}
.card h3{margin:.2rem 0 .4rem}
.card p{margin:.3rem 0;color:var(--muted);font-size:.97rem}
.card .badge{align-self:flex-start;font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;background:var(--sun);color:var(--ink);padding:.22rem .55rem;border-radius:99px;font-weight:700}
.card a.title{color:var(--ink);text-decoration:none}
.card a.title:hover{color:var(--teal)}

/* buttons */
.btn{display:inline-block;background:var(--teal);color:#fff;text-decoration:none;font-weight:700;padding:.7rem 1.25rem;border-radius:10px;margin:.6rem 0}
.btn:hover{background:var(--teal-dark);color:#fff}
.btn.amz{background:var(--ink)}
.btn.amz:hover{background:#000}
.btn.ghost{background:transparent;color:var(--teal);border:2px solid var(--teal)}

/* tables */
.tblwrap{overflow-x:auto;margin:1.4rem 0;border:1.5px solid var(--line);border-radius:var(--r)}
table{border-collapse:collapse;width:100%;font-size:.95rem;min-width:38rem}
th{background:var(--tint);text-align:left;font-family:var(--mono);font-size:.75rem;letter-spacing:.08em;text-transform:uppercase}
th,td{padding:.7rem .85rem;border-bottom:1px solid var(--line)}
tr:last-child td{border-bottom:0}
td a{font-weight:600}

/* product review blocks */
.pick{border:1.5px solid var(--line);border-left:6px solid var(--teal);border-radius:var(--r);padding:1.4rem 1.5rem;margin:1.6rem 0;background:var(--bg)}
.pick.top{border-left-color:var(--sun);background:var(--amber-bg)}
.pick h3{margin-top:0}
.proscons{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;margin:.9rem 0}
@media(max-width:640px){.proscons{grid-template-columns:1fr}}
.proscons ul{margin:.3rem 0;padding-left:1.15rem;font-size:.95rem}
.proscons .h{font-family:var(--mono);font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;font-weight:700}
.proscons .pros .h{color:var(--teal)}
.proscons .cons .h{color:#b4441f}

/* toc, faq, notices */
.toc{background:var(--tint);border:1px solid var(--line);border-radius:var(--r);padding:1rem 1.4rem;margin:1.5rem 0}
.toc ol{margin:.4rem 0;padding-left:1.2rem}
.toc a{text-decoration:none;font-weight:600}
.note{font-size:.88rem;color:var(--muted);background:var(--tint);border-radius:10px;padding:.7rem 1rem;margin:1rem 0}
details.faq{border:1px solid var(--line);border-radius:10px;padding:.8rem 1.1rem;margin:.6rem 0}
details.faq summary{font-weight:700;cursor:pointer}
.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:.6rem}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--teal)}

/* link hubs */
.hublist{columns:2;column-gap:2.5rem;padding-left:1.2rem}
@media(max-width:640px){.hublist{columns:1}}
.hublist li{margin:.35rem 0;break-inside:avoid}

/* wheel bullets */
ul.wheels{list-style:none;padding-left:0}
ul.wheels li{padding-left:1.5rem;position:relative;margin:.45rem 0}
ul.wheels li::before{content:"";position:absolute;left:0;top:.5em;width:.72em;height:.72em;border:2.5px solid var(--teal);border-radius:50%}

/* footer */
footer.site{background:var(--ink);color:#cfdad6;margin-top:2rem}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem;padding:2.8rem 0 1.6rem}
@media(max-width:760px){footer .cols{grid-template-columns:1fr 1fr}}
footer h2{color:#fff;font-size:.85rem;text-transform:uppercase;letter-spacing:.1em;font-family:var(--mono);font-weight:700;margin:0 0 .7rem}
footer ul{list-style:none;margin:0;padding:0}
footer li{margin:.4rem 0}
footer a{color:#cfdad6;text-decoration:none;font-size:.93rem}
footer a:hover{color:var(--sun)}
footer .fine{border-top:1px solid #34434a;padding:1.1rem 0 1.6rem;font-size:.8rem;color:#93a5a1}