/* ARKbot product site — static, no framework, no external requests. */
:root {
  --bg: #0b0b0d;
  --bg-raise: #131316;
  --card: #17171b;
  --line: #26262c;
  --text: #f4f4f6;
  --mute: #a0a0ab;
  --dim: #6f6f7a;
  --blue: #2f8bff;
  --blue-soft: rgba(47, 139, 255, 0.14);
  --green: #35c27a;
  --radius: 18px;
  --wrap: 1120px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: 24px; }

/* Header */
.nav { position: sticky; top: 0; z-index: 20; background: rgba(11, 11, 13, 0.78); backdrop-filter: saturate(160%) blur(18px); -webkit-backdrop-filter: saturate(160%) blur(18px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; gap: 22px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 650; font-size: 18px; letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; border-radius: 7px; }
.nav nav { margin-left: auto; display: flex; gap: 22px; align-items: center; }
.nav nav a { color: var(--mute); font-size: 15px; }
.nav nav a:hover { color: var(--text); text-decoration: none; }
.nav .pill { color: var(--text); background: var(--blue); padding: 7px 14px; border-radius: 999px; font-weight: 600; }
.nav .pill:hover { filter: brightness(1.1); }

/* Hero */
.hero { position: relative; padding: 84px 0 0; text-align: center; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: -30% -10% auto; height: 760px; background: radial-gradient(60% 55% at 50% 30%, rgba(47, 139, 255, 0.26), rgba(148, 102, 224, 0.10) 45%, transparent 70%); pointer-events: none; }
.hero > .wrap { position: relative; }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 650; letter-spacing: 0.09em; text-transform: uppercase; color: var(--blue); background: var(--blue-soft); padding: 6px 12px; border-radius: 999px; }
h1 { font-size: clamp(40px, 6.4vw, 76px); line-height: 1.04; letter-spacing: -0.035em; margin: 22px auto 0; max-width: 15ch; font-weight: 720; }
h1 em { font-style: normal; background: linear-gradient(92deg, #6db3ff, #b79bff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { font-size: clamp(18px, 2.1vw, 22px); color: var(--mute); max-width: 46ch; margin: 22px auto 0; line-height: 1.5; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 34px; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 22px; border-radius: 14px; font-weight: 620; font-size: 17px; border: 1px solid transparent; }
.btn:hover { text-decoration: none; }
.btn.primary { background: var(--text); color: #0b0b0d; }
.btn.primary:hover { background: #ffffff; }
.btn.ghost { border-color: var(--line); color: var(--text); background: rgba(255, 255, 255, 0.03); }
.btn.ghost:hover { border-color: #3a3a44; }
.btn small { display: block; font-size: 11px; font-weight: 500; opacity: 0.7; line-height: 1.1; }
.btn .stack { text-align: left; line-height: 1.15; }
.note { margin-top: 16px; font-size: 14px; color: var(--dim); }
.shot { margin: 64px auto 0; max-width: 1180px; padding-inline: 24px; }
.shot .frame { border-radius: 16px; overflow: hidden; border: 1px solid #2c2c33; box-shadow: 0 50px 120px -30px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(255, 255, 255, 0.03) inset; background: #15151a; }
.shot .bar { height: 34px; display: flex; align-items: center; gap: 8px; padding-left: 14px; background: #1b1b20; border-bottom: 1px solid #26262c; }
.shot .bar i { width: 12px; height: 12px; border-radius: 50%; background: #3a3a42; }
.shot .bar i:nth-child(1) { background: #ff5f57; }
.shot .bar i:nth-child(2) { background: #febc2e; }
.shot .bar i:nth-child(3) { background: #28c840; }

/* Sections */
section { padding: 104px 0; }
section.tight { padding-top: 40px; }
.kicker { font-size: 13px; font-weight: 650; letter-spacing: 0.09em; text-transform: uppercase; color: var(--blue); }
h2 { font-size: clamp(30px, 4vw, 46px); line-height: 1.1; letter-spacing: -0.03em; margin: 12px 0 0; font-weight: 700; max-width: 20ch; }
.sub { color: var(--mute); font-size: 19px; max-width: 56ch; margin: 16px 0 0; }
.center { text-align: center; }
.center h2, .center .sub { margin-inline: auto; }

.grid { display: grid; gap: 16px; margin-top: 48px; grid-template-columns: repeat(3, 1fr); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.card h3 { margin: 14px 0 6px; font-size: 19px; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--mute); font-size: 16px; line-height: 1.55; }
.ico { width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center; background: var(--blue-soft); color: #7dbbff; }
.ico svg { width: 21px; height: 21px; }

.split { display: grid; grid-template-columns: 1fr 1.25fr; gap: 56px; align-items: center; }
.split.flip { grid-template-columns: 1.25fr 1fr; }
.split .frame { border-radius: 14px; overflow: hidden; border: 1px solid #2c2c33; box-shadow: 0 40px 90px -30px rgba(0, 0, 0, 0.85); }
.ticks { list-style: none; padding: 0; margin: 26px 0 0; display: grid; gap: 14px; }
.ticks li { position: relative; padding-left: 30px; color: var(--mute); }
.ticks li b { color: var(--text); font-weight: 620; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 7px; width: 18px; height: 18px; border-radius: 50%; background: var(--blue-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cpath d='M5 9.3l2.6 2.6L13 6.4' fill='none' stroke='%237dbbff' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 18px no-repeat; }

.band { background: var(--bg-raise); border-block: 1px solid var(--line); }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.center .chips { justify-content: center; }
.chip { padding: 9px 15px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--text); font-size: 15px; }
.chip.more { color: var(--mute); border-style: dashed; }

/* Price */
.price { max-width: 560px; margin: 48px auto 0; background: linear-gradient(180deg, #1b1b21, #141418); border: 1px solid #2e2e36; border-radius: 24px; padding: 40px; text-align: center; }
.price .amount { font-size: 68px; font-weight: 720; letter-spacing: -0.04em; line-height: 1; }
.price .amount sup { font-size: 28px; vertical-align: top; position: relative; top: 8px; margin-right: 2px; color: var(--mute); }
.price .once { color: var(--mute); margin-top: 8px; }
.price .ticks { text-align: left; max-width: 380px; margin-inline: auto; }
.price .btn { margin-top: 30px; }

/* FAQ */
.faq { max-width: 780px; margin: 40px auto 0; }
.faq details { border-bottom: 1px solid var(--line); padding: 20px 0; }
.faq summary { cursor: pointer; font-weight: 620; font-size: 18px; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--dim); font-weight: 400; font-size: 24px; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq p { color: var(--mute); margin: 12px 0 0; }

/* Footer */
footer { border-top: 1px solid var(--line); padding: 44px 0 60px; color: var(--dim); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: center; }
footer nav { margin-left: auto; display: flex; flex-wrap: wrap; gap: 8px 22px; }
footer a { color: var(--mute); }
footer .fine { flex-basis: 100%; color: var(--dim); font-size: 13px; line-height: 1.6; max-width: 90ch; }

/* Document pages (privacy, terms, support) */
.doc { max-width: 760px; margin: 0 auto; padding: 72px 24px 96px; }
.doc h1 { font-size: clamp(34px, 5vw, 48px); text-align: left; max-width: none; margin: 0; }
.doc .updated { color: var(--dim); margin-top: 10px; font-size: 15px; }
.doc h2 { font-size: 24px; margin-top: 44px; max-width: none; letter-spacing: -0.015em; }
.doc h3 { font-size: 18px; margin: 28px 0 0; }
.doc p, .doc li { color: #c9c9d2; }
.doc ul { padding-left: 22px; }
.doc li { margin: 8px 0; }
.doc strong { color: var(--text); }
.doc .callout { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; margin-top: 24px; }
.doc .callout p { margin: 0; }

@media (max-width: 900px) {
  section { padding: 76px 0; }
  .grid { grid-template-columns: 1fr 1fr; }
  .split, .split.flip { grid-template-columns: 1fr; gap: 32px; }
  .split.flip .text { order: -1; }
  .nav nav a:not(.pill) { display: none; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .hero { padding-top: 56px; }
  .grid { grid-template-columns: 1fr; }
  .price { padding: 30px 22px; }
  .price .amount { font-size: 56px; }
  .shot { margin-top: 44px; padding-inline: 14px; }
  .shot .bar { height: 24px; gap: 6px; padding-left: 10px; }
  .shot .bar i { width: 8px; height: 8px; }
  footer nav { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }