/* Reverse LLC — reverse-apps.com. Blue, black and white. No external fonts or scripts. */
:root {
  color-scheme: dark;
  --bg: #05070a;
  --surface: #0c1117;
  --surface-2: #111821;
  --line: #1d2733;
  --text: #eef3f8;
  --muted: #9aa9b8;
  --blue: #6cc4ff;
  --blue-strong: #3aa8f0;
  --blue-ink: #04121e;
  --radius: 14px;
  --wrap: 1100px;
  --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
img { height: auto; }
main:focus { outline: none; }
a { color: var(--blue); text-underline-offset: 3px; }
a:hover { color: #9dd8ff; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 .5em; }
p { margin: 0 0 1em; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 10; background: var(--blue); color: var(--blue-ink); padding: 8px 12px; border-radius: 8px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 5; background: rgba(5, 7, 10, .86); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: -0.01em; }
.brand img { width: 34px; height: 34px; }
.brand span { font-size: 18px; }
.nav { display: flex; gap: 22px; }
.nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.nav a:hover { color: var(--text); }
.nav .cta { color: var(--blue); }

/* Hero */
.hero { padding: 96px 0 72px; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -40% -10% auto auto; width: 720px; height: 720px;
  background: radial-gradient(closest-side, rgba(108, 196, 255, .16), transparent 70%);
  pointer-events: none;
}
.eyebrow { font: 600 13px/1 var(--mono); color: var(--blue); letter-spacing: .06em; text-transform: uppercase; margin-bottom: 18px; display: inline-block; }
.hero h1 { font-size: clamp(38px, 6vw, 68px); max-width: 14ch; }
.hero h1 em { font-style: normal; color: var(--blue); }
.lede { font-size: clamp(18px, 2vw, 21px); color: var(--muted); max-width: 58ch; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 20px; border-radius: 999px; font-weight: 600; font-size: 16px; text-decoration: none; border: 1px solid transparent; }
.btn-primary { background: var(--blue); color: var(--blue-ink); }
.btn-primary:hover { background: #8fd3ff; color: var(--blue-ink); }
.btn-ghost { border-color: var(--line); color: var(--text); }
.btn-ghost:hover { border-color: var(--blue); color: var(--text); }

.prompt { margin-top: 56px; font: 14px/1.7 var(--mono); color: var(--muted); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; max-width: 560px; }
.prompt b { color: var(--blue); font-weight: 600; }
.prompt .ok { color: #7ee2a8; }

/* Sections */
section { padding: 80px 0; border-top: 1px solid var(--line); }
.section-head { max-width: 680px; margin-bottom: 40px; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 40px); }
.section-head p { color: var(--muted); font-size: 18px; }

.grid { display: grid; gap: 18px; grid-template-columns: repeat(3, 1fr); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.card h3 { font-size: 21px; margin-top: 16px; }
.card p { color: var(--muted); font-size: 16px; }
.card ul { margin: 0; padding: 0; list-style: none; font-size: 15px; color: var(--text); }
.card li { padding: 7px 0; border-top: 1px solid var(--line); }
.card li::before { content: "> "; font-family: var(--mono); color: var(--blue); }
.icon { width: 44px; height: 44px; border-radius: 12px; background: rgba(108, 196, 255, .1); border: 1px solid rgba(108, 196, 255, .28); display: grid; place-items: center; }
.icon svg { width: 22px; height: 22px; stroke: var(--blue); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* Product */
.product { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; background: var(--surface); border: 1px solid var(--line); border-radius: 22px; padding: 40px; }
.product-mark { display: flex; align-items: center; gap: 16px; margin-bottom: 18px; }
.product-mark img { width: 72px; height: 72px; border-radius: 17px; }
.product-mark h3 { font-size: 30px; margin: 0; }
.product-mark small { display: block; color: var(--muted); font-size: 15px; }
.product p { color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 24px; padding: 0; list-style: none; }
.tags li { font: 13px/1 var(--mono); padding: 8px 11px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--line); color: var(--text); }
.product-art { background: #0b0d10; border-radius: 18px; border: 1px solid var(--line); aspect-ratio: 4 / 3; display: grid; place-items: center; }
.product-art img { width: 58%; border-radius: 22%; }

/* Principles */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; list-style: none; padding: 0; margin: 0; }
.steps li { border-top: 2px solid var(--blue); padding-top: 18px; }
.steps li::before { counter-increment: step; content: "0" counter(step); font: 600 13px/1 var(--mono); color: var(--blue); display: block; margin-bottom: 12px; }
.steps h3 { font-size: 19px; }
.steps p { color: var(--muted); font-size: 15px; }

/* Contact */
.contact { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: start; }
.contact-box { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; font-size: 16px; }
.contact-box dt { font: 600 12px/1 var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-top: 18px; }
.contact-box dt:first-child { margin-top: 0; }
.contact-box dd { margin: 6px 0 0; }

/* Legal pages */
.doc { padding: 64px 0 88px; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: clamp(32px, 5vw, 46px); }
.doc h2 { font-size: 22px; margin-top: 2em; }
.doc p, .doc li { color: #d3dce5; }
.doc ul { padding-left: 1.2em; }
.doc li { margin-bottom: .4em; }
.meta { color: var(--muted); font: 14px/1.5 var(--mono); }
.note { background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--blue); border-radius: 10px; padding: 16px 18px; margin: 24px 0; }
.note p:last-child { margin: 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 26px 0 34px; color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 18px; align-items: center; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.site-footer a { color: var(--muted); text-decoration: none; display: inline-block; padding: 10px 0; }
.site-footer a:hover { color: var(--text); }

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .product, .contact { grid-template-columns: 1fr; }
  .product { padding: 26px; }
  .product-art { order: -1; aspect-ratio: 16 / 9; }
  .product-art img { width: 34%; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav a:not(.cta) { display: none; }
  .hero { padding: 64px 0 56px; }
  section { padding: 60px 0; }
  .steps { grid-template-columns: 1fr; }
  .prompt { font-size: 13px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
.actions.flush { margin-top: 0; }
.section-head.flush { margin-bottom: 0; }
.hero-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 48px; align-items: center; }
.hero-grid .prompt { margin-top: 0; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } .hero-grid .prompt { margin-top: 16px; } }
.brand img { border-radius: 50%; box-shadow: 0 0 0 1px #243140; }