/* Shared styles for Prufloop content pages (brand kit v1.0: night ground, orange proof accent, Syne / IBM Plex Sans). */
:root{
  --orange:#FF5F1F; --night:#0A0A1F; --violet:#8A5CFF; --violet-deep:#5B2EE0; --haze:#F3F3FA;
  --night-2:#14142C; --line:rgba(243,243,250,.14); --muted:rgba(243,243,250,.72);
  --display:'Syne',sans-serif; --body:'IBM Plex Sans',sans-serif;
}
*{box-sizing:border-box}
body{margin:0;background:var(--night);color:var(--haze);font:400 18px/1.65 var(--body);-webkit-font-smoothing:antialiased}
a{color:var(--orange)}
img,svg{display:block}
.wrap{max-width:860px;margin:0 auto;padding:0 22px}
h1,h2,h3{font-family:var(--display);font-weight:800;letter-spacing:-.03em;line-height:1.05;margin:0}
h1{font-size:clamp(38px,6vw,64px);margin:18px 0 20px}
h2{font-size:clamp(26px,3.6vw,38px);margin:56px 0 16px}
h3{font-size:21px;letter-spacing:-.02em;margin:28px 0 8px}
p{margin:0 0 16px}
.o{color:var(--orange)}
.muted{color:var(--muted)}
.tm{font-size:.55em;vertical-align:super;font-family:var(--body);font-weight:600}

/* header */
.top{position:sticky;top:0;z-index:20;background:var(--night);border-bottom:1px solid var(--line)}
.top .wrap{max-width:1100px;display:flex;align-items:center;justify-content:space-between;height:64px;gap:14px}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--haze)}
.logo svg{width:32px;height:32px}
.logo span{font:800 24px/1 var(--display);letter-spacing:-.035em}
.logo sup{font:600 .38em/1 var(--body);vertical-align:top;position:relative;top:.2em}
.top nav{display:flex;align-items:center;gap:22px}
.top nav a{color:var(--muted);text-decoration:none;font-size:15px}
.top nav a:hover{color:var(--haze)}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 24px;border-radius:999px;background:var(--orange);color:var(--night)!important;font:700 17px/1 var(--body);text-decoration:none}
.top .btn{padding:10px 16px;font-size:15px;white-space:nowrap}
@media (max-width:720px){.top nav a:not(.btn){display:none}.logo span{font-size:21px}}

/* article */
main{padding:40px 0 72px}
.crumb{font-size:14px;color:var(--muted)}
.crumb a{color:var(--muted)}
.lead{font-size:clamp(19px,2.2vw,22px);line-height:1.5;color:var(--haze)}
.def{border-left:4px solid var(--orange);background:var(--night-2);padding:20px 22px;border-radius:6px;margin:28px 0}
.def b{display:block;font:700 13px/1.2 var(--body);letter-spacing:.08em;text-transform:uppercase;color:var(--orange);margin-bottom:8px}
ul.d,ol.n{padding-left:0;list-style:none;margin:0 0 18px}
ul.d li,ol.n li{position:relative;padding-left:26px;margin-bottom:10px}
ul.d li::before{content:"";position:absolute;left:4px;top:.62em;width:8px;height:8px;background:var(--orange);transform:rotate(45deg)}
ol.n{counter-reset:n}
ol.n li{counter-increment:n;padding-left:34px}
ol.n li::before{content:counter(n);position:absolute;left:0;top:0;font:800 18px/1.5 var(--display);color:var(--orange)}
table{width:100%;border-collapse:collapse;margin:8px 0 22px;font-size:16px}
th,td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.tbl{overflow-x:auto}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:12px 0 22px}
.card{border:1px solid var(--line);border-radius:8px;padding:18px}
.card h3{margin:0 0 6px}
.card p{margin:0;color:var(--muted);font-size:16px}
@media (max-width:640px){.grid{grid-template-columns:1fr}}
.cta{margin:44px 0 0;background:var(--orange);color:var(--night);border-radius:10px;padding:28px}
.cta h2{margin:0 0 10px;color:var(--night)}
.cta p{color:var(--night)}
.cta .btn{background:var(--night);color:var(--haze)!important}
details{border-bottom:1px solid var(--line);padding:16px 0}
summary{cursor:pointer;font-weight:700;font-size:18px}
details p{margin:10px 0 0;color:var(--muted)}
.fine{font-size:13px;color:var(--muted)}
.nerd-note{border:1px dashed rgba(255,95,31,.55);background:rgba(255,95,31,.05);border-radius:10px;padding:14px 16px;margin:18px 0 6px;color:var(--muted);font-size:16px}
.nerd-note b{color:var(--haze)}
.fine a{color:var(--muted)}

/* footer */
footer{border-top:1px solid var(--line);padding:36px 0}
footer .wrap{max-width:1100px}
footer nav{display:flex;flex-wrap:wrap;gap:16px;margin:14px 0}
footer nav a{color:var(--muted);text-decoration:none;font-size:15px}
footer .legal{font-size:12px;color:var(--muted)}

/* site menu (hamburger) */
.burger{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:46px;height:46px;padding:0 12px;border:1px solid var(--line);border-radius:12px;background:transparent;cursor:pointer;flex:none}
.burger span{display:block;height:2px;border-radius:2px;background:var(--haze)}
.burger:hover{border-color:var(--haze)}
.hdr-r{display:flex;align-items:center;gap:10px}
.menu{position:fixed;inset:0;z-index:200}
.menu[hidden]{display:none}
.menu-back{position:absolute;inset:0;background:rgba(5,5,16,.62)}
.menu-panel{position:absolute;top:0;right:0;height:100%;width:min(380px,90vw);background:var(--night-2);border-left:1px solid var(--line);padding:16px 24px 32px;overflow-y:auto;display:flex;flex-direction:column;animation:menuin .18s ease-out}
@keyframes menuin{from{transform:translateX(24px)}}
@media (prefers-reduced-motion:reduce){.menu-panel{animation:none}}
.menu [hidden]{display:none!important}
.menu-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.menu-top b{font:800 24px/1 var(--display);letter-spacing:-.03em}
.menu-x{width:46px;height:46px;border:0;background:none;color:var(--haze);font-size:32px;line-height:1;cursor:pointer}
.menu-h{margin:20px 0 4px;font:700 12px/1.2 var(--body);letter-spacing:.12em;text-transform:uppercase;color:var(--orange)}
.menu-panel a:not(.btn){display:block;padding:12px 0;border-bottom:1px solid var(--line);color:var(--haze);text-decoration:none;font:600 18px/1.3 var(--body)}
.menu-panel a:not(.btn):hover{color:var(--orange)}
.menu-panel .btn{margin-top:24px;align-self:stretch;text-align:center}
html.menu-open{overflow:hidden}
section[id]{scroll-margin-top:76px}
@media (max-width:400px){.hdr-r .btn .long{display:none}}