/* PIQ Labs — shared across the company page and the writing. No build step. */

:root{
  --bg:#fbfbfa; --panel:#fff; --ink:#16150f; --muted:#5d5b52; --faint:#8a877c;
  --line:#e5e3db; --spark:#a67c1a; --spark-soft:#f6efdd; --rule:#efede5;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0e0e0c; --panel:#161613; --ink:#f2f1ea; --muted:#a8a59a; --faint:#7c7a70;
    --line:#2a2a25; --spark:#d9ad4e; --spark-soft:#241f12; --rule:#232320;
  }
}
:root[data-theme="dark"]{
  --bg:#0e0e0c; --panel:#161613; --ink:#f2f1ea; --muted:#a8a59a; --faint:#7c7a70;
  --line:#2a2a25; --spark:#d9ad4e; --spark-soft:#241f12; --rule:#232320;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:44rem; margin:0 auto; padding:0 1.5rem}
.narrow{max-width:38rem}

a{color:var(--spark)}
a:hover{text-decoration:underline}

.mono{font-family:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
      font-size:.72rem; letter-spacing:.11em; text-transform:uppercase; color:var(--faint)}

/* ── masthead ─────────────────────────────────────────── */
.top{display:flex; align-items:baseline; justify-content:space-between; gap:1rem;
     padding:2.25rem 0 0; flex-wrap:wrap}
.brand{display:flex; align-items:baseline; gap:.55rem; text-decoration:none; color:inherit}
.brand b{font-size:1.05rem; font-weight:650; letter-spacing:-.01em}
.brand:hover{text-decoration:none}
.spark{color:var(--spark)}
.top nav{display:flex; gap:1.25rem}
.top nav a{color:var(--muted); text-decoration:none; font-size:.92rem}
.top nav a:hover{color:var(--spark)}

/* ── headings & text ──────────────────────────────────── */
h1{font-size:clamp(2rem,6vw,3rem); line-height:1.1; letter-spacing:-.03em;
   font-weight:660; margin:0 0 1.25rem}
h2{font-size:1.15rem; font-weight:640; letter-spacing:-.01em; margin:0 0 1rem}
h3{font-size:1rem; font-weight:620; margin:.45rem 0 .5rem}
p{margin:0 0 1.1rem; color:var(--muted)}
p strong{color:var(--ink); font-weight:600}
.lede{font-size:clamp(1.05rem,2.4vw,1.2rem); color:var(--muted); margin:0}
section{padding:4rem 0 0}
hr{border:0; border-top:1px solid var(--rule); margin:3.5rem 0 0}

/* ── the three rules ──────────────────────────────────── */
.rules{list-style:none; padding:0; margin:2rem 0 0; display:grid; gap:1px;
       background:var(--line); border:1px solid var(--line); border-radius:12px; overflow:hidden}
.rules li{background:var(--panel); padding:1.4rem 1.5rem}
.rules p{margin:0; font-size:.94rem}

/* ── cards ────────────────────────────────────────────── */
.products{display:grid; gap:1rem; margin-top:2rem}
@media(min-width:38rem){.products{grid-template-columns:1fr 1fr}}
.card{display:block; text-decoration:none; color:inherit; background:var(--panel);
      border:1px solid var(--line); border-radius:12px; padding:1.5rem;
      transition:border-color .15s ease, transform .15s ease}
.card:hover{border-color:var(--spark); transform:translateY(-2px); text-decoration:none}
.card b{display:block; font-size:1.05rem; font-weight:640; margin:.5rem 0 .4rem}
.card p{font-size:.92rem; margin:0}
.card .go{display:inline-block; margin-top:.9rem; font-size:.88rem; color:var(--spark); font-weight:560}

/* featured essay */
.feature{display:block; text-decoration:none; color:inherit; margin-top:1.75rem;
         background:var(--panel); border:1px solid var(--line); border-left:3px solid var(--spark);
         border-radius:0 12px 12px 0; padding:1.6rem 1.75rem;
         transition:transform .15s ease, border-color .15s ease}
.feature:hover{transform:translateY(-2px); text-decoration:none}
.feature b{display:block; font-size:1.3rem; font-weight:650; letter-spacing:-.02em;
           margin:.5rem 0 .55rem; line-height:1.25}
.feature p{margin:0; font-size:.96rem}
.feature .go{display:inline-block; margin-top:1rem; font-size:.9rem; color:var(--spark); font-weight:560}

.note{margin-top:2.25rem; padding:1.15rem 1.35rem; background:var(--spark-soft);
      border-left:2px solid var(--spark); border-radius:0 8px 8px 0}
.note p{margin:0; font-size:.93rem; color:var(--ink)}

/* ── essay body ───────────────────────────────────────── */
article{padding-top:3rem}
article p{font-size:1.05rem; color:var(--ink); margin:0 0 1.35rem}
article h2{font-size:1.3rem; margin:2.75rem 0 1rem; letter-spacing:-.015em}
article ul{margin:0 0 1.35rem; padding-left:1.15rem; color:var(--ink)}
article li{margin:0 0 .6rem; font-size:1.05rem}
article blockquote{margin:0 0 1.35rem; padding:.2rem 0 .2rem 1.15rem;
                   border-left:2px solid var(--spark); color:var(--muted); font-style:italic}
.byline{margin:0 0 2.5rem; font-size:.9rem; color:var(--faint)}
.pull{margin:2.25rem 0; padding:1.3rem 1.5rem; background:var(--panel);
      border:1px solid var(--line); border-radius:12px}
.pull p{margin:0; font-size:1.02rem}
.tiers{width:100%; border-collapse:collapse; margin:0 0 1.35rem; font-size:.95rem}
.tiers td{border-bottom:1px solid var(--rule); padding:.6rem .5rem; vertical-align:top; color:var(--ink)}
.tiers td:first-child{white-space:nowrap; font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
                      font-size:.82rem; color:var(--spark); padding-right:1.25rem}
.endnote{margin-top:3rem; padding-top:1.5rem; border-top:1px solid var(--rule);
         font-size:.93rem; color:var(--muted)}

/* ── footer ───────────────────────────────────────────── */
footer{margin-top:5rem; padding:2rem 0 3.5rem; border-top:1px solid var(--line)}
.foot{display:flex; flex-wrap:wrap; gap:.5rem 1.5rem; align-items:baseline;
      justify-content:space-between}
footer a{color:var(--muted); text-decoration:none}
footer a:hover{color:var(--spark)}