/* ============ Design tokens ============ */
:root{
  --paper:#F4EFE3;
  --paper-2:#EDE7D9;
  --ink:#1F3DF5;
  --ink-soft:rgba(31,61,245,.5);
  --ink-hair:rgba(31,61,245,.22);
  --graphite:#2A2A28;
  --graphite-soft:#55524b;
  --accent:#E5392F;
  --ink-on-dark:#9FB4FF;
  --paper-on-dark:#ECE7D8;
  --term-bg:#0B1020;

  --display:"Anton",Impact,sans-serif;
  --sans:"Space Grotesk",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  --maxw:1120px;
  --pad:clamp(20px,5vw,64px);
  --section-y:clamp(64px,9vw,120px);
  --radius:8px;
}

/* ============ Base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0; background:var(--paper); color:var(--graphite);
  font-family:var(--sans); font-weight:400; line-height:1.55;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
img,svg{max-width:100%; height:auto; display:block;}
a{color:var(--ink); text-decoration:none;}
a:hover{text-decoration:underline;}
:focus-visible{outline:2px solid var(--ink); outline-offset:3px; border-radius:2px;}
h1,h2,h3,p{margin:0;}

/* ============ Layout ============ */
.container{max-width:var(--maxw); margin-inline:auto; padding-inline:var(--pad);}
.section{padding-block:var(--section-y);}
.section--band{background:var(--paper-2);}
.marker{font-family:var(--mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--ink); opacity:.75; display:flex; align-items:center; gap:10px; margin-bottom:18px;}
.marker::before{content:""; width:26px; height:1px; background:var(--ink); opacity:.6;}

/* ============ Typography helpers ============ */
.eyebrow{font-family:var(--mono); font-weight:500; font-size:12px; letter-spacing:.14em;
  text-transform:uppercase; color:var(--ink); opacity:.8;}
.display{font-family:var(--display); font-weight:400; text-transform:uppercase;
  line-height:.9; letter-spacing:-.005em; color:var(--ink);}
.h-section{font-family:var(--display); font-weight:400; text-transform:uppercase;
  line-height:.92; letter-spacing:-.005em; color:var(--ink);
  font-size:clamp(32px,5vw,60px); margin-bottom:14px;}
.subhead{font-size:clamp(16px,2vw,19px); color:var(--graphite); max-width:60ch;}
.lead{font-size:clamp(18px,2.4vw,24px); color:var(--graphite); max-width:46ch; line-height:1.4;}
.mono{font-family:var(--mono); font-size:13px;}
.callout{font-family:var(--mono); font-size:12px; color:var(--ink);}

/* ============ Buttons ============ */
.btn-pill{display:inline-flex; align-items:center; gap:8px; font-family:var(--sans); font-weight:700;
  font-size:14px; color:var(--ink); border:1.5px solid var(--ink); border-radius:40px;
  padding:10px 24px; background:transparent; cursor:pointer; transition:background .15s,color .15s;}
.btn-pill:hover{background:var(--ink); color:var(--paper); text-decoration:none;}
.btn-pill--solid{background:var(--ink); color:var(--paper);}
.btn-pill--solid:hover{background:#152fd0;}

/* ============ Command strip + copy ============ */
.cmd{display:flex; align-items:center; justify-content:space-between; gap:12px;
  border:1px solid var(--ink); border-radius:var(--radius); padding:10px 12px;
  font-family:var(--mono); font-size:13px; color:var(--ink); background:transparent; overflow:auto;}
.cmd code{font-family:var(--mono); white-space:nowrap;}
.cmd__copy{flex:none; font-family:var(--mono); font-size:11px; letter-spacing:.08em; text-transform:uppercase;
  color:var(--ink); background:transparent; border:1px solid var(--ink-hair); border-radius:5px;
  padding:4px 8px; cursor:pointer;}
.cmd__copy:hover{background:var(--ink); color:var(--paper);}
.cmd__copy[data-copied="true"]{background:var(--accent); border-color:var(--accent); color:#fff;}

/* ============ Cards / grids ============ */
.cards{display:grid; gap:18px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
.card{border:1px solid var(--ink-hair); border-radius:var(--radius); padding:22px; background:var(--paper);}
.card__title{font-family:var(--display); text-transform:uppercase; color:var(--ink);
  font-size:20px; line-height:1; margin-bottom:8px;}
.card__meta{font-family:var(--mono); font-size:11px; color:var(--ink); opacity:.7; margin-bottom:10px;}
.card p{font-size:14px; color:var(--graphite);}

/* ============ Terminal (the one dark panel — deliberate contrast) ============ */
.terminal{background:var(--term-bg); border-radius:var(--radius); overflow:hidden; font-family:var(--mono); font-size:13px;}
.terminal__bar{display:flex; gap:6px; padding:10px 12px; border-bottom:1px solid rgba(255,255,255,.08);}
.terminal__bar i{width:10px; height:10px; border-radius:50%; background:#33384d; display:inline-block;}
.terminal__body{padding:14px 16px; color:var(--ink-on-dark); line-height:1.7;}
.terminal__body .ok{color:#6ee7a8;}
.terminal__body .file{color:var(--paper-on-dark);}
.terminal__body .conf{color:#F2A33C;}

/* ============ Tabs ============ */
.tabs{display:flex; gap:4px; border:1px solid var(--ink-hair); border-radius:40px; padding:4px; width:max-content; max-width:100%; overflow:auto;}
.tab{font-family:var(--mono); font-size:12px; color:var(--ink); background:transparent; border:0;
  padding:7px 16px; border-radius:40px; cursor:pointer; white-space:nowrap;}
.tab[aria-selected="true"]{background:var(--ink); color:var(--paper);}
.tabpanel[hidden]{display:none;}

/* ============ Footer ============ */
.footer{border-top:1px solid var(--ink-hair); padding-block:48px; font-family:var(--mono); font-size:13px;}
.footer__links{display:flex; flex-wrap:wrap; gap:18px 28px; margin-top:14px;}

/* ============ Sticky install CTA ============ */
.sticky-cta{position:fixed; right:18px; bottom:18px; z-index:50; opacity:0; transform:translateY(12px);
  pointer-events:none; transition:opacity .25s, transform .25s;}
.sticky-cta.is-shown{opacity:1; transform:none; pointer-events:auto;}

/* ============ Reveal-on-scroll ============ */
.js [data-reveal]{opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease;}
[data-reveal].is-visible{opacity:1; transform:none;}

/* ============ Reduced motion ============ */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{transition:none !important; animation:none !important;}
  .js [data-reveal]{opacity:1; transform:none;}
}

/* ============ Responsive ============ */
@media (max-width:820px){
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .grid-3{grid-template-columns:1fr;}
  .grid-2{grid-template-columns:1fr;}
}
@media (max-width:520px){
  .grid-4{grid-template-columns:1fr;}
}

/* ============ Hero ============ */
.hero{padding-block:clamp(36px,6vw,72px) var(--section-y);}
.hero__top{display:flex; justify-content:space-between; font-family:var(--mono); font-size:11px;
  letter-spacing:.12em; color:var(--ink); opacity:.75; border-bottom:1px solid var(--ink-hair);
  padding-bottom:14px; margin-bottom:36px;}
.hero__grid{display:grid; grid-template-columns:1.05fr .95fr; gap:48px; align-items:center;}
.hero__grid > *{min-width:0;}
.hero__title{font-size:clamp(44px,7.5vw,104px); margin:0 0 18px;}
.hero__sub{font-size:clamp(16px,2vw,20px); color:var(--graphite); max-width:42ch; margin-bottom:26px;}
.hero__cmd{margin-bottom:22px; max-width:520px;}
.hero__cta{display:flex; gap:14px; flex-wrap:wrap;}

/* Hero illustration — static placeholder for the looping rotation video. Fades/settles in
   on load via .engine--assembled (toggled by initEngine()); prefers-reduced-motion users get
   it immediately, since transitions are disabled globally and the class is added at once. */
.engine{display:flex; justify-content:center;}
/* The generated frame's cream is ~4/255 off the page paper, so its square edge is faintly
   visible on the flat field. Feather the outer edge so the boundary dissolves into the page;
   the server sits centered with margin, so its solid interior is untouched. (Also applies to
   the future <video>, which shares this class.) */
.engine__img{width:100%; max-width:480px; height:auto;
  -webkit-mask-image:radial-gradient(closest-side, #000 70%, transparent 99%);
          mask-image:radial-gradient(closest-side, #000 70%, transparent 99%);}
.js .engine__img{opacity:0; transform:translateY(10px) scale(.99);
  transition:opacity .6s ease, transform .6s ease;}
.js .engine--assembled .engine__img{opacity:1; transform:none;}

@media (max-width:880px){
  .hero__grid{grid-template-columns:1fr; gap:32px;}
  .hero__title{font-size:clamp(40px,12vw,72px);}
  .engine__img{max-width:360px;}
}

/* ============ Quick start ============ */
.qs-steps{display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin:26px 0 30px;}
.qs-step{border-top:2px solid var(--ink); padding-top:14px;}
.qs-step__n{font-family:var(--mono); font-size:11px; color:var(--ink); letter-spacing:.1em;}
.qs-step h3{font-family:var(--sans); font-weight:700; font-size:16px; margin:6px 0 6px;}
.qs-step p{font-size:14px; color:var(--graphite-soft);}
@media (max-width:820px){ .qs-steps{grid-template-columns:1fr;} }

.factors{display:grid; grid-template-columns:repeat(5,1fr); gap:12px; margin-top:24px;}
.factor{border:1px solid var(--ink-hair); border-radius:var(--radius); padding:14px;}
.factor b{font-family:var(--sans); font-weight:700; font-size:14px; display:block; margin-bottom:4px;}
.factor span{font-size:12px; color:var(--graphite-soft);}
@media (max-width:820px){ .factors{grid-template-columns:repeat(2,1fr);} }

.langs{display:flex; flex-wrap:wrap; gap:8px; margin-top:22px;}
.lang{font-family:var(--mono); font-size:12px; color:var(--ink); border:1px solid var(--ink-hair);
  border-radius:5px; padding:6px 10px;}
.lang--first{border-color:var(--accent); color:var(--accent);}
