/* Benzene marketing site: one dark world, chosen on purpose (the ring is drawn in light). */
:root {
  --ground: #0b0d12;
  --ground-2: #10131b;
  --surface: #151a25;
  --surface-2: #1b2130;
  --line: #262e40;
  --line-2: #33405a;
  --text: #e6e9ef;
  --muted: #9aa3b2;
  --faint: #6b7487;
  --amber: #f5b942;
  --amber-2: #ffd27a;
  --cyan: #5ad1e6;
  --green: #6ee7a0;
  --coral: #ff6b6b;
  --display: "Manrope", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --radius: 10px;
  --gutter: clamp(16px, 4vw, 40px);
  --measure: 66ch;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; } }
body {
  margin: 0; background: var(--ground); color: var(--text);
  font-family: var(--body); font-size: 17px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--amber-2); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3, h4 { font-family: var(--display); font-weight: 700; line-height: 1.12; letter-spacing: -0.015em; text-wrap: balance; margin: 0 0 0.4em; }
h1 { font-size: clamp(2.2rem, 5.6vw, 4.2rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.4rem); }
p { margin: 0 0 1em; max-width: var(--measure); }
p.lede { font-size: 1.15rem; color: var(--muted); }
small, .small { font-size: 0.9rem; color: var(--muted); }
code, pre, kbd { font-family: var(--mono); font-size: 0.92em; }
code { background: var(--surface-2); padding: 0.1em 0.4em; border-radius: 5px; color: var(--amber-2); }
pre { background: var(--ground-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.2rem; overflow-x: auto; line-height: 1.55; margin: 0 0 1.2rem; }
pre code { background: none; padding: 0; color: var(--text); }
pre .c { color: var(--muted); }   /* 4.5:1 at 14 px: --faint was 3.96:1 */
pre .k { color: var(--amber-2); }
pre .s { color: var(--green); }
pre .v { color: var(--cyan); }
.eyebrow { font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.74rem; color: var(--amber); margin: 0 0 0.9rem; }
.wrap { width: min(1180px, 100%); margin: 0 auto; padding-inline: var(--gutter); }
section { padding-block: clamp(3rem, 8vw, 6.5rem); }
section + section { border-top: 1px solid var(--line); }
.grid { display: grid; gap: 1.25rem; }
.grid > *, .two > *, .hero .wrap > *, .step > *, .stats > * { min-width: 0; }   /* grid children never widen the page */
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.35rem 1.4rem; }
.card h3 { margin-top: 0.2rem; }
.card p:last-child { margin-bottom: 0; }
.card .tag { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--cyan); }
.plain { background: transparent; border: 0; padding: 0; }

/* header */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: color-mix(in srgb, var(--ground) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 1.2rem; min-height: 56px; }  /* one row under 64 px with the border; the controls inside are 44 px */
.brand { display: flex; align-items: center; gap: 0.6rem; min-height: 44px; font-family: var(--display); font-weight: 800; letter-spacing: -0.01em; color: var(--text); font-size: 1.15rem; }
.brand svg { width: 34px; height: 34px; }
nav.main { margin-left: auto; display: flex; gap: 0.2rem; align-items: center; }
nav.main a { color: var(--muted); padding: 0.45rem 0.7rem; min-height: 44px; display: inline-flex; align-items: center; border-radius: 7px; font-size: 0.95rem; }
nav.main a:hover, nav.main a[aria-current="page"] { color: var(--text); background: var(--surface); text-decoration: none; }
nav.main a.cta { color: var(--ground); background: var(--amber); font-weight: 600; margin-left: 0.4rem; }
nav.main a.cta:hover { background: var(--amber-2); }
.menu-btn { display: none; margin-left: auto; min-height: 44px; min-width: 44px; align-items: center; background: var(--surface); border: 1px solid var(--line); color: var(--text); border-radius: 7px; padding: 0.4rem 0.9rem; font: inherit; }
@media (max-width: 820px) {
  .menu-btn { display: inline-flex; }
  nav.main { display: none; position: absolute; left: 0; right: 0; top: 57px; flex-direction: column; align-items: stretch; background: var(--ground-2); border-bottom: 1px solid var(--line); padding: 0.6rem var(--gutter) 1rem; gap: 0.2rem; }
  nav.main.open { display: flex; }
  nav.main a.cta { margin: 0.4rem 0 0; text-align: center; }
}

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.75rem 1.2rem; border-radius: 8px; font-weight: 600; font-family: var(--display); border: 1px solid var(--line-2); color: var(--text); background: var(--surface); }
.btn:hover { text-decoration: none; border-color: var(--amber); }
.btn.primary { background: var(--amber); color: var(--ground); border-color: var(--amber); }
.btn.primary:hover { background: var(--amber-2); }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }

/* hero */
.hero { padding-block: clamp(2.5rem, 6vw, 5rem) clamp(2rem, 5vw, 4rem); position: relative; overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(1.5rem, 4vw, 4rem); align-items: center; }
@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero .wrap > div:last-child { order: -1; }          /* on a phone the ring comes first */
  .ring-stage { max-width: 420px; }
}
.hero h1 span { color: var(--amber-2); }
.hero .lede { max-width: 54ch; }
.install { display: flex; width: fit-content; align-items: center; gap: 0.8rem; margin-top: 1.4rem; background: var(--ground-2); border: 1px solid var(--line); border-radius: 8px; padding: 0.7rem 1rem; font-family: var(--mono); font-size: 0.92rem; max-width: 100%; overflow-x: auto; white-space: nowrap; }
.install .p { color: var(--muted); }
.install button { background: transparent; border: 1px solid var(--line-2); color: var(--muted); border-radius: 6px; padding: 0.2rem 0.55rem; font: inherit; font-size: 0.8rem; cursor: pointer;; min-height: 44px; min-width: 44px; }
.install button:hover { color: var(--text); border-color: var(--amber); }

/* the ring showcase */
.ring-stage { position: relative; aspect-ratio: 1 / 1; max-width: 560px; width: 100%; margin: 0 auto; }
.ring-stage svg { width: 100%; height: 100%; display: block; overflow: visible; }
.ring-stage .halo { position: absolute; inset: 10%; border-radius: 50%; background: radial-gradient(circle, rgba(245,185,66,0.16), rgba(245,185,66,0.03) 55%, transparent 72%); filter: blur(12px); pointer-events: none; }
.ring-legend { display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; justify-content: center; margin-top: 0.6rem; font-family: var(--mono); font-size: 0.74rem; color: var(--muted); letter-spacing: 0.06em; }
.ring-legend b { color: var(--amber-2); font-weight: 600; }

/* stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 170px), 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.stats div { background: var(--surface); padding: 1.1rem 1.2rem; }
.stats strong { display: block; font-family: var(--display); font-size: 1.9rem; color: var(--amber-2); letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.stats span { color: var(--muted); font-size: 0.92rem; }

/* evolution stage */
.evo { background: var(--ground-2); border: 1px solid var(--line); border-radius: 14px; padding: clamp(0.6rem, 2vw, 1.4rem); }
.evo object, .evo img { width: 100%; height: auto; display: block; aspect-ratio: 3 / 2; background: var(--ground); border-radius: 8px; }  /* the SVG is transparent; the object's own canvas must be dark */
.evo-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 150px), 1fr)); gap: 0.6rem 1rem; margin-top: 1.2rem; }
.evo-steps div { font-size: 0.9rem; color: var(--muted); border-top: 2px solid var(--line-2); padding-top: 0.5rem; }
.evo-steps b { display: block; color: var(--text); font-family: var(--display); }

/* tables */
.tbl { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.tbl th, .tbl td { text-align: left; padding: 0.7rem 0.8rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl th { font-family: var(--display); font-size: 0.85rem; letter-spacing: 0.04em; color: var(--muted); text-transform: uppercase; }
.tbl td:first-child { color: var(--text); font-weight: 600; }
.tbl .y { color: var(--green); } .tbl .n { color: var(--muted); } .tbl .p { color: var(--amber-2); }
.scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.scroll .tbl { min-width: 720px; }

/* loop rows */
.loop { display: grid; grid-template-columns: 110px 1fr; gap: 0.3rem 1rem; font-size: 0.95rem; }
.loop dt { font-family: var(--mono); color: var(--amber); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; padding-top: 0.15rem; }
.loop dd { margin: 0; color: var(--muted); }
@media (max-width: 480px) { .loop { grid-template-columns: 1fr; gap: 0 } .loop dd { margin-bottom: 0.5rem } }

/* steps */
.steps { counter-reset: step; display: grid; gap: 1rem; }
.step { display: grid; grid-template-columns: 44px 1fr; gap: 1rem; align-items: start; }
.step::before { counter-increment: step; content: counter(step); font-family: var(--display); font-weight: 800; color: var(--ground); background: var(--amber); width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; }
.step h2, .step h3 { margin: 0.25rem 0 0.3rem; font-size: 1.2rem; }
.step p { margin-bottom: 0.5rem; }

/* callouts */
.note { border-left: 3px solid var(--cyan); background: var(--surface); padding: 0.9rem 1.1rem; border-radius: 0 var(--radius) var(--radius) 0; color: var(--muted); }
.note b { color: var(--text); }
.quote { font-family: var(--display); font-size: clamp(1.2rem, 2.4vw, 1.7rem); font-weight: 600; line-height: 1.35; max-width: 30ch; color: var(--text); }

/* footer */
footer { border-top: 1px solid var(--line); padding-block: 2.5rem 3rem; color: var(--muted); font-size: 0.92rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 1rem 2.5rem; align-items: center; }
footer nav { display: flex; flex-wrap: wrap; gap: 0 0.6rem; }
footer nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 0.3rem; }  /* tap targets */
footer a { color: var(--muted); }
footer .brand { font-size: 1rem; min-height: 44px; }

/* page hero (inner pages) */
.page-head { padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 4vw, 3rem); border-bottom: 1px solid var(--line); }
.page-head p { color: var(--muted); font-size: 1.1rem; }
.two { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); gap: 2rem; align-items: start; }
.kpi { font-family: var(--mono); color: var(--cyan); font-size: 0.85rem; }
ul.clean { list-style: none; padding: 0; margin: 0 0 1rem; }
ul.clean li { padding: 0.35rem 0 0.35rem 1.3rem; position: relative; color: var(--muted); }
ul.clean li::before { content: ""; position: absolute; left: 0; top: 0.95rem; width: 8px; height: 8px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 8px var(--amber); }
ul.clean li b { color: var(--text); }