/* Reversium v1 site. Dark by choice: a black store page, a city at night.
   Layout: one centered column (max 1100px), hero thesis first, then a store-style listing,
   then tech-spec tables. Hairlines over cards. Display: Instrument Sans. Utility: Geist Mono. */

:root {
  color-scheme: dark;
  --bg: #09090b;          /* near-black, cool */
  --bg-2: #0f0f12;
  --surface: rgba(255,255,255,.035);
  --surface-2: rgba(255,255,255,.06);
  --hair: rgba(255,255,255,.08);
  --edge: rgba(255,255,255,.14);
  --fg: #f5f5f7;
  --fg-2: #a7a7b1;
  --fg-3: #6f6f7a;
  --win: #ffd9a0;         /* window light. The only warm color on the page. */
  --focus: #8ab4ff;
  --radius: 14px;
  --radius-sm: 8px;
  --col: 1100px;
  --font-display: "Instrument Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
.skip { position: absolute; left: 12px; top: -48px; background: var(--fg); color: var(--bg); padding: 8px 12px; border-radius: 6px; z-index: 50; }
.skip:focus { top: 12px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

.wrap { max-width: var(--col); margin: 0 auto; padding-left: max(20px, env(safe-area-inset-left, 0px)); padding-right: max(20px, env(safe-area-inset-right, 0px)); }
.mono { font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em; text-transform: uppercase; color: var(--fg-3); }

/* Nav */
.nav { position: sticky; top: 0; z-index: 20; backdrop-filter: blur(18px) saturate(1.2); background: rgba(9,9,11,.72); border-bottom: 1px solid var(--hair); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 52px; gap: 16px; }
.wordmark { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -.01em; font-size: 15px; }
.wordmark .dot { width: 22px; height: 22px; border-radius: 50%; background: var(--fg); color: var(--bg); display: grid; place-items: center; font-weight: 700; font-size: 12px; }
.nav nav { display: flex; gap: 22px; }
.nav nav a { font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em; color: var(--fg-2); }
.nav nav a:hover { color: var(--fg); }
.pill { display: inline-flex; align-items: center; justify-content: center; height: 34px; padding: 0 16px; border-radius: 999px; font-weight: 600; font-size: 14px; border: 1px solid transparent; cursor: pointer; font-family: inherit; white-space: nowrap; }
.pill.ghost { border-color: var(--edge); color: var(--fg); background: transparent; }
.pill.ghost:hover { background: var(--surface-2); }
.pill.solid { background: var(--fg); color: var(--bg); }
.pill.solid:hover { background: #fff; }
.pill.lg { height: 46px; padding: 0 24px; font-size: 16px; }
@media (max-width: 700px) { .nav nav { display: none; } }

/* Hero */
.hero { text-align: center; padding-block: 88px 0; }
.eyebrow { font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--fg-3); margin: 0 0 22px; }
.eyebrow b { color: var(--fg-2); font-weight: 500; }
h1 { font-size: clamp(44px, 8.4vw, 104px); line-height: .98; letter-spacing: -.045em; font-weight: 700; margin: 0 auto; max-width: 11ch; text-wrap: balance; }
.sub { font-size: clamp(20px, 2.6vw, 30px); line-height: 1.25; letter-spacing: -.015em; color: var(--fg-2); margin: 22px auto 0; max-width: 28ch; text-wrap: balance; }
.sub em { font-style: normal; color: var(--fg); }
.cta { display: flex; align-items: center; justify-content: center; gap: 18px; flex-wrap: wrap; margin-top: 34px; }
.status { font-family: var(--font-mono); font-size: 12px; letter-spacing: .03em; color: var(--fg-3); }


/* Drop zone + ask box: the input is the product */
.drop { border: 1px dashed var(--edge); border-radius: 22px; padding: 10px; background: linear-gradient(180deg, var(--surface), transparent); transition: border-color .2s ease, background .2s ease; text-align: left; }
.drop:hover, .drop:focus-within { border-color: rgba(255,255,255,.3); }
.drop.is-over { border-style: solid; border-color: var(--fg); background: var(--surface-2); }
.drop-in { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 14px; padding: 14px 12px 16px; }
.drop-ico { width: 40px; height: 40px; border-radius: 12px; border: 1px solid var(--edge); display: grid; place-items: center; color: var(--fg-2); background: var(--bg-2); }
.drop-txt { display: grid; gap: 2px; min-width: 0; }
.drop-txt b { font-size: 17px; font-weight: 600; letter-spacing: -.01em; }
.drop-txt span { font-size: 14px; color: var(--fg-2); }
.drop-pick { height: 36px; }
.rv { gap: 8px; }
.rv-dot { width: 20px; height: 20px; border-radius: 50%; background: var(--bg); color: var(--fg); display: grid; place-items: center; font-weight: 700; font-size: 11px; }
.ask-note { text-align: center; margin: 14px 0 0; text-transform: none; letter-spacing: .01em; }
@media (max-width: 700px) { .drop-in { grid-template-columns: auto 1fr; } .drop-pick { grid-column: 1 / -1; justify-self: start; } }

.ask { margin: 40px auto 0; max-width: 820px; }
.ask-box { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 6px; padding: 6px 6px 6px 18px; border: 1px solid var(--edge); border-radius: 999px; background: var(--bg-2); box-shadow: inset 0 1px 0 rgba(255,255,255,.06); }
.ask-box:focus-within { border-color: rgba(255,255,255,.3); }
.ask-prefix { font-family: var(--font-mono); font-size: 13px; letter-spacing: .02em; color: var(--fg-3); white-space: nowrap; }
.ask-box input { min-width: 0; font: inherit; font-size: 20px; letter-spacing: -.01em; padding: 12px 8px; border: 0; background: transparent; color: var(--fg); outline: none; }
.ask-box input::placeholder { color: var(--fg-2); }
.ask-box .pill { height: 44px; padding: 0 20px; }
.ask-try { display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.ask-try button { font-family: var(--font-mono); font-size: 12px; letter-spacing: .02em; color: var(--fg-2); background: transparent; border: 1px solid var(--hair); border-radius: 999px; padding: 6px 12px; cursor: pointer; }
.ask-try button:hover { color: var(--fg); border-color: var(--edge); background: var(--surface); }
@media (max-width: 700px) {
  .ask-box { grid-template-columns: 1fr; border-radius: 22px; padding: 8px; }
  .ask-prefix { display: none; }
  .ask-box input { font-size: 18px; padding: 10px 12px; }
  .ask-box .pill { width: 100%; }
}

/* Blueprint demo */
.bp { margin-top: 56px; border: 1px solid var(--edge); border-radius: 18px; background: var(--bg-2); overflow: hidden; box-shadow: 0 40px 100px rgba(0,0,0,.6); }
.bp-bar { display: flex; align-items: center; gap: 14px; padding: 12px 16px; border-bottom: 1px solid var(--hair); background: var(--surface); }
.bp-dots { display: inline-flex; gap: 6px; }
.bp-dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--edge); display: inline-block; }
.bp-title { flex: 1; margin: 0; font-family: var(--font-mono); font-size: 13px; font-weight: 500; letter-spacing: .02em; color: var(--fg-2); }
.bp-title span { color: var(--fg); }
.bp-body { display: grid; grid-template-columns: 260px 1fr; min-height: 340px; }
.bp-steps { margin: 0; padding: 20px 18px; list-style: none; border-right: 1px solid var(--hair); display: grid; align-content: start; gap: 10px; }
.bp-steps li { font-family: var(--font-mono); font-size: 12.5px; line-height: 1.4; color: var(--fg-3); padding-left: 22px; position: relative; transition: color .25s ease; }
.bp-steps li::before { content: ""; position: absolute; left: 0; top: 5px; width: 9px; height: 9px; border-radius: 50%; border: 1px solid var(--fg-3); }
.bp-steps li.active { color: var(--fg); }
.bp-steps li.active::before { border-color: var(--fg); background: var(--fg); box-shadow: 0 0 0 4px rgba(255,255,255,.12); animation: pulse 1s ease-in-out infinite; }
.bp-steps li.done { color: var(--fg-2); }
.bp-steps li.done::before { border-color: var(--fg-2); background: var(--fg-2); }
@keyframes pulse { 50% { box-shadow: 0 0 0 7px rgba(255,255,255,.05); } }
.bp-doc { margin: 0; padding: 22px 26px; font-family: var(--font-mono); font-size: 13.5px; line-height: 1.75; color: var(--fg); white-space: pre-wrap; display: grid; align-content: start; gap: 6px; }
.bp-doc .ln { display: grid; grid-template-columns: 7ch 1fr; gap: 16px; animation: rise .35s ease both; }
.bp-doc .ln b { color: var(--win); font-weight: 500; letter-spacing: .06em; }
.bp-doc .ln span { color: var(--fg-2); }
.bp-doc .ln:first-child span { color: var(--fg); }
@keyframes rise { from { opacity: 0; transform: translateY(4px); } }
.bp-foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 12px 16px; border-top: 1px solid var(--hair); }
.bp-foot .mono { text-transform: none; letter-spacing: .01em; font-size: 12px; }
@media (max-width: 820px) { .bp-body { grid-template-columns: 1fr; } .bp-steps { border-right: 0; border-bottom: 1px solid var(--hair); grid-template-columns: 1fr 1fr; } .bp-doc { padding: 18px; } .bp-doc .ln { grid-template-columns: 1fr; gap: 2px; } }

/* Early access panel */
.panel { margin-top: 24px; padding: 24px 28px; border: 1px solid var(--edge); border-radius: 22px; background: var(--bg-2); }
.panel[hidden] { display: none; }
.panel h3 { margin: 0 0 4px; font-size: 20px; letter-spacing: -.01em; }
.panel > p { margin: 0 0 18px; color: var(--fg-2); font-size: 15px; }
.panel form { display: grid; gap: 14px; max-width: 560px; }
label { display: grid; gap: 7px; font-size: 14px; font-weight: 500; }
label .opt { font-weight: 400; color: var(--fg-3); }
input[type="email"], input[type="text"] { font: inherit; font-size: 16px; padding: 12px 14px; border: 1px solid var(--edge); border-radius: 10px; background: var(--bg); color: var(--fg); }
input::placeholder { color: var(--fg-3); }
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.note { font-family: var(--font-mono); font-size: 12px; line-height: 1.5; color: var(--fg-2); background: var(--surface); border: 1px solid var(--hair); border-radius: 10px; padding: 10px 12px; margin: 0; }
.note[hidden] { display: none; }

/* Sections */
section.block { padding-block: 96px 0; }
.block-head { display: grid; grid-template-columns: 1fr; gap: 10px; margin-bottom: 34px; }
.block-head h2 { margin: 0; font-size: clamp(30px, 4vw, 44px); letter-spacing: -.03em; line-height: 1.05; font-weight: 600; text-wrap: balance; max-width: 22ch; }
.block-head p { margin: 0; color: var(--fg-2); font-size: 17px; max-width: 58ch; }
.block-head .mono { order: -1; }

/* Spec table */
.spec { border-top: 1px solid var(--edge); }
.spec .r { display: grid; grid-template-columns: 220px 1fr 1fr; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--hair); align-items: start; scroll-margin-top: 80px; }
.spec .r:target, .spec .r.is-target { background: linear-gradient(90deg, var(--surface-2), transparent); }
.spec .n { font-weight: 600; font-size: 17px; letter-spacing: -.01em; }
.spec .n small { display: block; font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--fg-3); font-weight: 500; margin-top: 4px; }
.spec .ex { color: var(--fg); font-size: 16px; line-height: 1.45; }
.spec .ex::before { content: "“"; color: var(--fg-3); }
.spec .ex::after { content: "”"; color: var(--fg-3); }
.spec .rule { font-family: var(--font-mono); font-size: 12.5px; line-height: 1.55; color: var(--fg-2); }
@media (max-width: 820px) { .spec .r { grid-template-columns: 1fr; gap: 10px; } }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--hair); border: 1px solid var(--hair); border-radius: var(--radius); overflow: hidden; }
.step { background: var(--bg); padding: 26px 24px 28px; }
.step .k { font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; color: var(--fg-3); }
.step h3 { margin: 14px 0 8px; font-size: 20px; letter-spacing: -.015em; font-weight: 600; }
.step p { margin: 0; color: var(--fg-2); font-size: 15px; line-height: 1.55; }
@media (max-width: 820px) { .steps { grid-template-columns: 1fr; } }

/* Teardown */
.td { display: grid; grid-template-columns: 1.2fr 1fr; gap: 28px; align-items: start; }
.td-card { border: 1px dashed var(--edge); border-radius: var(--radius); padding: 26px; }
.td-card .k { font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--fg-3); }
.td-card h3 { margin: 10px 0 8px; font-size: 24px; letter-spacing: -.02em; font-weight: 600; }
.td-card p { margin: 0; color: var(--fg-2); font-size: 15px; }
.td-card code { font-family: var(--font-mono); font-size: 12.5px; color: var(--fg-2); background: var(--surface); padding: 3px 7px; border-radius: 6px; }
@media (max-width: 820px) { .td { grid-template-columns: 1fr; } }

/* Trust */
.trust { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--hair); border: 1px solid var(--hair); border-radius: var(--radius); overflow: hidden; }
.trust li { background: var(--bg); padding: 20px 22px; list-style: none; font-size: 15px; line-height: 1.5; color: var(--fg-2); display: grid; grid-template-columns: 22px 1fr; gap: 12px; }
.trust li b { color: var(--fg); font-weight: 600; display: block; margin-bottom: 2px; }
.trust li .i { font-family: var(--font-mono); font-size: 11px; color: var(--fg-3); padding-top: 4px; }
.trust { margin: 0; padding: 0; }
@media (max-width: 820px) { .trust { grid-template-columns: 1fr; } }
.trust-links { display: flex; gap: 22px; flex-wrap: wrap; margin-top: 18px; }
.trust-links a { font-family: var(--font-mono); font-size: 12.5px; color: var(--fg-2); border-bottom: 1px solid var(--edge); padding-bottom: 2px; }
.trust-links a:hover { color: var(--fg); }

/* Marks */
.marks { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.mark { border: 1px solid var(--hair); border-radius: var(--radius); padding: 28px 20px 22px; text-align: center; background: var(--surface); }
.mark svg { width: 96px; height: 96px; display: block; margin: 0 auto 16px; }
.mark b { display: block; font-size: 15px; font-weight: 600; }
.mark span { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .04em; color: var(--fg-3); }
.mk-fill { fill: var(--fg); }
.mk-stroke { fill: none; stroke: var(--fg); stroke-width: 8; stroke-linecap: round; }
.mk-letter { font: 700 56px var(--font-display); fill: var(--fg); }
.mk-letter-inv { font: 700 56px var(--font-display); fill: var(--bg); }
@media (max-width: 700px) { .marks { grid-template-columns: 1fr; } }

/* Footer */
footer.site { margin-top: 96px; border-top: 1px solid var(--hair); padding-block: 28px 44px; }
footer.site .wrap { display: grid; grid-template-columns: 1fr auto; gap: 16px 32px; align-items: start; font-family: var(--font-mono); font-size: 12px; letter-spacing: .02em; color: var(--fg-3); }
footer.site a { color: var(--fg-2); }
footer.site a:hover { color: var(--fg); }
footer.site nav { display: flex; gap: 18px; flex-wrap: wrap; }
footer.site .ig { grid-column: 1 / -1; font-family: var(--font-display); font-size: 15px; color: var(--fg-2); letter-spacing: -.01em; }
@media (max-width: 700px) { footer.site .wrap { grid-template-columns: 1fr; } }

/* Prose pages */
.prose { padding-block: 56px 72px; max-width: 70ch; }
.prose h1 { font-size: clamp(32px, 5vw, 48px); max-width: none; text-align: left; margin: 0 0 8px; letter-spacing: -.035em; }
.prose h2 { font-size: 20px; margin: 30px 0 8px; letter-spacing: -.015em; }
.prose p, .prose li { color: var(--fg-2); font-size: 16px; line-height: 1.6; }
.prose .back { font-family: var(--font-mono); font-size: 12.5px; color: var(--fg-2); display: inline-block; margin-bottom: 22px; }