/* =========================================================
   Metro Torque & Tune — shared stylesheet
   Identity: workshop / test bench. Graphite steel + safety amber.
   Display: Saira Condensed · Body: IBM Plex Sans · Code: IBM Plex Mono
   ========================================================= */

:root{
  --ink:#14171c;
  --steel:#1e2630;
  --steel-2:#2a333f;
  --paper:#eef0f3;
  --surface:#ffffff;
  --amber:#f2a60c;
  --amber-deep:#bd820a;
  --hairline:#d7dbe1;
  --muted:#5c6470;
  --ink-on-dark:#e8ebef;
  --muted-on-dark:#9aa4b1;
  --maxw:1120px;
  --read:42rem;
  --r:10px;
  --shadow:0 1px 2px rgba(20,23,28,.06),0 8px 24px rgba(20,23,28,.06);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"IBM Plex Sans",system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  font-size:1.0625rem;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit}

/* ---- accessibility ---- */
:focus-visible{outline:3px solid var(--amber);outline-offset:2px;border-radius:3px}
.skip{
  position:absolute;left:-999px;top:0;z-index:200;
  background:var(--amber);color:var(--ink);padding:.6rem 1rem;font-weight:600;border-radius:0 0 8px 0;
}
.skip:focus{left:0}

/* ---- type ---- */
.display{font-family:"Saira Condensed",sans-serif;font-weight:700;line-height:.98;letter-spacing:.005em}
h1,h2,h3,h4{font-family:"Saira Condensed",sans-serif;line-height:1.05;letter-spacing:.01em;color:var(--ink)}
.eyebrow{
  font-family:"IBM Plex Mono",monospace;font-size:.74rem;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;color:var(--amber-deep);
}
code,kbd,samp,.mono{font-family:"IBM Plex Mono",monospace;font-size:.92em}
.code-chip{
  font-family:"IBM Plex Mono",monospace;font-size:.86em;font-weight:600;
  background:var(--ink);color:#ffd98a;padding:.08em .42em;border-radius:5px;white-space:nowrap;
}

/* ---- layout shell ---- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.15rem}
.section{padding:3.25rem 0}

/* ---- top nav ---- */
.nav{position:sticky;top:0;z-index:100;background:var(--steel);color:var(--ink-on-dark);
  border-bottom:1px solid rgba(255,255,255,.07)}
.nav__row{display:flex;align-items:center;gap:1rem;height:62px}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--ink-on-dark);flex:0 0 auto}
.brand__mark{width:30px;height:30px;flex:0 0 auto}
.brand__name{font-family:"Saira Condensed",sans-serif;font-weight:700;font-size:1.32rem;
  letter-spacing:.04em;text-transform:uppercase;line-height:1}
.brand__name b{color:var(--amber)}
.nav__links{display:none;gap:.2rem;margin-left:auto;align-items:center}
.nav__links a{
  text-decoration:none;color:var(--muted-on-dark);font-family:"Saira Condensed",sans-serif;
  font-weight:600;font-size:1.04rem;letter-spacing:.03em;text-transform:uppercase;
  padding:.4rem .7rem;border-radius:7px;position:relative;
}
.nav__links a:hover,.nav__links a[aria-current="page"]{color:#fff}
.nav__links a:hover::after,.nav__links a[aria-current="page"]::after{
  content:"";position:absolute;left:.7rem;right:.7rem;bottom:.15rem;height:2px;background:var(--amber)}
.nav__tools{margin-left:auto;display:flex;gap:.4rem;align-items:center}
.nav__links + .nav__tools{margin-left:1rem}
.iconbtn{
  background:transparent;border:1px solid rgba(255,255,255,.18);color:var(--ink-on-dark);
  width:40px;height:40px;border-radius:8px;display:grid;place-items:center;cursor:pointer}
.iconbtn:hover{border-color:var(--amber);color:#fff}
.iconbtn svg{width:19px;height:19px}
.menu-toggle{display:inline-grid}
.nav__mobile{display:none;border-top:1px solid rgba(255,255,255,.08);padding:.4rem 0 .7rem}
.nav__mobile a{display:block;text-decoration:none;color:var(--ink-on-dark);
  font-family:"Saira Condensed",sans-serif;font-weight:600;font-size:1.1rem;letter-spacing:.03em;
  text-transform:uppercase;padding:.55rem 1.15rem}
.nav__mobile a:hover{background:var(--steel-2)}
.nav__mobile.open{display:block}

@media(min-width:860px){
  .nav__links{display:flex}
  .menu-toggle{display:none}
  .nav__tools{margin-left:0}
}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:.5rem;text-decoration:none;cursor:pointer;
  font-family:"Saira Condensed",sans-serif;font-weight:700;font-size:1.05rem;letter-spacing:.04em;
  text-transform:uppercase;padding:.7rem 1.25rem;border-radius:8px;border:2px solid transparent;line-height:1}
.btn--amber{background:var(--amber);color:#1a1206;border-color:var(--amber)}
.btn--amber:hover{background:var(--amber-deep);border-color:var(--amber-deep)}
.btn--ghost{background:transparent;color:var(--ink-on-dark);border-color:rgba(255,255,255,.35)}
.btn--ghost:hover{border-color:var(--amber);color:#fff}
.btn--dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn--dark:hover{background:var(--steel-2);border-color:var(--steel-2)}

/* ---- hero ---- */
.hero{background:var(--steel);color:var(--ink-on-dark);position:relative;overflow:hidden}
.hero__grid{display:grid;gap:1.4rem;padding:3.4rem 0 3.6rem;align-items:center}
.hero h1{color:#fff;font-size:clamp(2.6rem,8vw,4.6rem);margin:.4rem 0 .2rem;text-transform:uppercase}
.hero h1 .amber{color:var(--amber)}
.hero p.lead{color:var(--muted-on-dark);font-size:1.15rem;max-width:34rem;margin:.4rem 0 1.3rem}
.hero__cta{display:flex;flex-wrap:wrap;gap:.7rem}
.gauge{justify-self:center;width:min(360px,82vw)}
@media(min-width:880px){
  .hero__grid{grid-template-columns:1.15fr .85fr;padding:4.6rem 0 4.8rem}
}

/* ---- category strip ---- */
.cats{display:grid;grid-template-columns:1fr 1fr;gap:.75rem;margin-top:-1.6rem;position:relative;z-index:3}
.cat{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--r);
  padding:1rem 1.05rem;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);display:block}
.cat:hover{border-color:var(--amber);transform:translateY(-2px)}
.cat__k{font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.16em;color:var(--amber-deep)}
.cat__t{font-family:"Saira Condensed",sans-serif;font-weight:700;font-size:1.45rem;
  text-transform:uppercase;margin:.15rem 0 .1rem;line-height:1}
.cat__d{font-size:.9rem;color:var(--muted);line-height:1.45}
@media(min-width:760px){.cats{grid-template-columns:repeat(4,1fr)}}

/* ---- section heads ---- */
.shead{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;margin-bottom:1.4rem;
  border-bottom:2px solid var(--ink);padding-bottom:.5rem}
.shead h2{font-size:clamp(1.7rem,4vw,2.3rem);text-transform:uppercase;margin:0}
.shead a{text-decoration:none;color:var(--amber-deep);font-family:"IBM Plex Mono",monospace;
  font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;white-space:nowrap}
.shead a:hover{text-decoration:underline}

/* ---- card grid ---- */
.grid{display:grid;gap:1.1rem;grid-template-columns:1fr}
@media(min-width:620px){.grid{grid-template-columns:1fr 1fr}}
@media(min-width:960px){.grid{grid-template-columns:repeat(3,1fr)}}
.card{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--r);
  overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}
.card:hover{border-color:var(--amber)}
.card__top{height:7px;background:linear-gradient(90deg,var(--amber),var(--amber-deep))}
.card__body{padding:1.05rem 1.1rem 1.2rem;display:flex;flex-direction:column;gap:.5rem;flex:1}
.card__cat{font-family:"IBM Plex Mono",monospace;font-size:.7rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--amber-deep)}
.card__title{font-family:"Saira Condensed",sans-serif;font-weight:700;font-size:1.42rem;
  line-height:1.04;text-transform:uppercase;margin:0}
.card__title a{text-decoration:none}
.card__title a:hover{color:var(--amber-deep)}
.card__sum{font-size:.93rem;color:var(--muted);line-height:1.5;margin:0}
.card__meta{margin-top:auto;font-size:.8rem;color:var(--muted);display:flex;gap:.6rem;align-items:center;
  padding-top:.5rem;border-top:1px dashed var(--hairline)}

/* ---- about strip (E-E-A-T) ---- */
.author{background:var(--ink);color:var(--ink-on-dark);border-radius:14px;padding:1.8rem 1.5rem;
  display:grid;gap:1.1rem;align-items:center}
.author h2{color:#fff;text-transform:uppercase;margin:0 0 .4rem;font-size:1.7rem}
.author p{color:var(--muted-on-dark);margin:.3rem 0}
.author .badge{display:inline-flex;align-items:center;gap:.5rem;background:var(--steel-2);
  border:1px solid rgba(255,255,255,.12);border-radius:999px;padding:.35rem .8rem;
  font-family:"IBM Plex Mono",monospace;font-size:.74rem;letter-spacing:.08em;color:#fff;margin:.2rem .35rem .2rem 0}
.author__face{width:84px;height:84px;border-radius:50%;background:var(--amber);color:#1a1206;
  display:grid;place-items:center;font-family:"Saira Condensed",sans-serif;font-weight:700;font-size:2.1rem}
@media(min-width:680px){.author{grid-template-columns:auto 1fr;padding:2.2rem 2rem}}

/* =========================================================
   Article page
   ========================================================= */
.crumbs{font-family:"IBM Plex Mono",monospace;font-size:.76rem;letter-spacing:.06em;color:var(--muted);
  padding:1.1rem 0 0}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--amber-deep)}
.article{max-width:var(--read);margin:0 auto;padding:1rem 0 2rem}
.article-head{max-width:var(--read);margin:0 auto;padding:1.4rem 0 .6rem}
.article-head h1{font-size:clamp(2.1rem,6vw,3.2rem);text-transform:uppercase;margin:.4rem 0 .6rem}
.byline{display:flex;flex-wrap:wrap;gap:.6rem 1rem;align-items:center;color:var(--muted);
  font-size:.86rem;border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline);
  padding:.7rem 0;margin:.6rem 0 0}
.byline .avatar{width:34px;height:34px;border-radius:50%;background:var(--amber);color:#1a1206;
  display:grid;place-items:center;font-family:"Saira Condensed",sans-serif;font-weight:700;font-size:1rem}
.byline strong{color:var(--ink)}

.article h2{font-size:1.62rem;text-transform:uppercase;margin:2.1rem 0 .6rem;
  padding-top:.2rem;border-top:2px solid var(--hairline)}
.article h3{font-size:1.24rem;margin:1.4rem 0 .4rem;color:var(--steel-2)}
.article p{margin:.7rem 0}
.article ul,.article ol{margin:.7rem 0;padding-left:1.3rem}
.article li{margin:.3rem 0}
.article a{color:var(--amber-deep);text-decoration:underline;text-underline-offset:2px}
.lead-para{font-size:1.16rem;color:var(--steel-2)}

.spec{background:var(--surface);border:1px solid var(--hairline);border-left:4px solid var(--amber);
  border-radius:8px;padding:1rem 1.1rem;margin:1.3rem 0;box-shadow:var(--shadow)}
.spec .spec__h{font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--amber-deep);margin:0 0 .4rem}
.spec p,.spec ul{margin:.3rem 0}
.spec.warn{border-left-color:#c23b22}
.spec.warn .spec__h{color:#c23b22}

.related{max-width:var(--read);margin:2rem auto 0;border-top:2px solid var(--ink);padding-top:1rem}
.related h2{font-size:1.3rem;text-transform:uppercase;margin:0 0 .7rem;border:0;padding:0}
.related ul{list-style:none;padding:0;margin:0;display:grid;gap:.5rem}
.related a{display:flex;gap:.6rem;text-decoration:none;color:var(--ink);align-items:baseline}
.related a:hover .rl-t{color:var(--amber-deep)}
.related .rl-k{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--amber-deep);flex:0 0 auto}
.related .rl-t{font-family:"Saira Condensed",sans-serif;font-weight:600;font-size:1.12rem;text-transform:uppercase}

.adslot{max-width:var(--read);margin:1.4rem auto;border:1px dashed var(--hairline);border-radius:8px;
  background:repeating-linear-gradient(45deg,#fff,#fff 12px,#f6f7f9 12px,#f6f7f9 24px);
  color:var(--muted);text-align:center;padding:.7rem;font-family:"IBM Plex Mono",monospace;font-size:.72rem;
  letter-spacing:.1em;text-transform:uppercase}

/* generic prose page (legal/about/contact) */
.page{max-width:var(--read);margin:0 auto;padding:1rem 0 2.5rem}
.page h1{font-size:clamp(2rem,6vw,2.9rem);text-transform:uppercase;margin:.3rem 0 .3rem}
.page h2{font-size:1.4rem;text-transform:uppercase;margin:1.7rem 0 .5rem;border-top:2px solid var(--hairline);padding-top:.7rem}
.page p,.page li{margin:.6rem 0}
.page a{color:var(--amber-deep)}
.page ul{padding-left:1.3rem}
.updated{font-family:"IBM Plex Mono",monospace;font-size:.76rem;color:var(--muted);letter-spacing:.05em}

.contact-grid{display:grid;gap:1rem;margin:1.2rem 0}
.contact-card{background:var(--surface);border:1px solid var(--hairline);border-radius:10px;padding:1.1rem 1.2rem;box-shadow:var(--shadow)}
.contact-card .k{font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--amber-deep)}
.contact-card .v{font-family:"Saira Condensed",sans-serif;font-weight:600;font-size:1.3rem}
.contact-card .v a{text-decoration:none;color:var(--ink)}

/* ---- footer ---- */
.foot{background:var(--ink);color:var(--muted-on-dark);margin-top:2rem}
.foot__grid{display:grid;gap:1.6rem;padding:2.6rem 0 1.4rem}
.foot h4{color:#fff;font-size:1.05rem;letter-spacing:.06em;text-transform:uppercase;margin:0 0 .7rem}
.foot a{color:var(--muted-on-dark);text-decoration:none;display:block;padding:.18rem 0}
.foot a:hover{color:var(--amber)}
.foot__brand .brand__name{font-size:1.5rem}
.foot__brand p{font-size:.9rem;max-width:24rem;line-height:1.6}
.foot__bottom{border-top:1px solid rgba(255,255,255,.08);padding:1rem 0 2rem;font-size:.82rem;
  display:flex;flex-wrap:wrap;gap:.6rem 1.2rem;justify-content:space-between;align-items:center}
@media(min-width:760px){.foot__grid{grid-template-columns:1.6fr 1fr 1fr 1fr}}

/* ---- search overlay ---- */
.search{position:fixed;inset:0;z-index:300;background:rgba(20,23,28,.55);display:none;
  padding:8vh 1rem 1rem;backdrop-filter:blur(2px)}
.search.open{display:block}
.search__box{max-width:640px;margin:0 auto;background:var(--surface);border-radius:14px;
  box-shadow:0 24px 60px rgba(0,0,0,.35);overflow:hidden}
.search__bar{display:flex;align-items:center;gap:.6rem;padding:.9rem 1rem;border-bottom:1px solid var(--hairline)}
.search__bar svg{width:20px;height:20px;color:var(--muted);flex:0 0 auto}
.search__bar input{flex:1;border:0;outline:0;font-size:1.1rem;font-family:inherit;color:var(--ink);background:transparent}
.search__close{border:0;background:var(--paper);border-radius:7px;padding:.3rem .6rem;cursor:pointer;
  font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--muted)}
.search__results{max-height:54vh;overflow:auto;padding:.4rem}
.search__results a{display:block;text-decoration:none;color:var(--ink);padding:.7rem .8rem;border-radius:8px}
.search__results a:hover,.search__results a.active{background:var(--paper)}
.search__results .r-cat{font-family:"IBM Plex Mono",monospace;font-size:.68rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--amber-deep)}
.search__results .r-t{font-family:"Saira Condensed",sans-serif;font-weight:600;font-size:1.18rem;text-transform:uppercase}
.search__results .r-s{font-size:.86rem;color:var(--muted)}
.search__empty{padding:1.4rem;color:var(--muted);text-align:center}

/* ---- cookie banner ---- */
.cookie{position:fixed;left:1rem;right:1rem;bottom:1rem;z-index:400;max-width:760px;margin:0 auto;
  background:var(--ink);color:var(--ink-on-dark);border:1px solid var(--steel-2);border-radius:14px;
  box-shadow:0 18px 50px rgba(0,0,0,.4);padding:1.1rem 1.2rem;display:none}
.cookie.show{display:block}
.cookie h3{color:#fff;font-size:1.2rem;text-transform:uppercase;margin:0 0 .3rem}
.cookie p{font-size:.9rem;color:var(--muted-on-dark);margin:.2rem 0 .9rem;line-height:1.55}
.cookie p a{color:var(--amber)}
.cookie__btns{display:flex;flex-wrap:wrap;gap:.6rem}
.cookie__btns .btn{font-size:.92rem;padding:.55rem 1rem}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}
.cat,.card,.btn{transition:transform .15s ease,border-color .15s ease,background .15s ease}