:root {
  --bg: #111214;
  --bg-soft: #1a1c20;
  --card: #1f2126;
  --text: #f2f3f5;
  --text-soft: #a5a9b3;
  --line: #2d3036;
  --accent: #5a8cff;
  --accent-ink: #ffffff;
  --orange: #ff9f45;
  --pink: #ff5e8f;
  --indigo: #7d74ff;
  --green: #3fcf6b;
  --purple: #c07cf2;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.8);
  --radius: 14px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font: 0.88em ui-monospace, "SF Mono", Menlo, monospace; background: var(--bg-soft); padding: 1px 5px; border-radius: 5px; }

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.5em; }
h1 { font-size: clamp(2.3rem, 5.5vw, 4rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
h3 { font-size: 1.1rem; letter-spacing: -0.01em; }
p { margin: 0 0 1em; color: var(--text-soft); }
strong { color: var(--text); }

.wrap { max-width: 1140px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 700px) { .wrap { padding: 0 28px; } }
.narrow { max-width: 780px; }
.center { text-align: center; }
.dim { color: var(--text-soft); }
.accent { color: var(--accent); }

/* Buttons */
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 999px; font-weight: 600;
  border: 1px solid transparent; transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 8px 24px -10px var(--accent); }
.btn-ghost { color: var(--text); border-color: var(--line); background: var(--card); }
.btn-small { padding: 7px 16px; font-size: 0.92rem; background: var(--accent); color: var(--accent-ink); }
.btn-large { padding: 15px 30px; font-size: 1.1rem; }

/* Navigation */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 1.2rem; font-weight: 700; letter-spacing: -0.01em; color: var(--text); }
.brand:hover { text-decoration: none; }
.nav nav { display: flex; gap: 22px; margin-left: auto; }
.nav nav a { color: var(--text-soft); font-size: 0.95rem; }
@media (max-width: 720px) { .nav nav { display: none; } .nav .btn-small { margin-left: auto; } }

/* Hero */
.hero { padding: 72px 0 40px; text-align: center; background: radial-gradient(1200px 500px at 50% -10%, color-mix(in srgb, var(--accent) 14%, transparent), transparent); }
.hero-inner { max-width: 860px; }
.hero-icon { margin: 0 auto 14px; filter: drop-shadow(0 14px 24px rgba(30, 60, 120, 0.25)); }
.wordmark { font-size: clamp(1.7rem, 3.2vw, 2.2rem); font-weight: 800; letter-spacing: -0.02em; color: var(--text); margin: 0 0 18px; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.8rem; font-weight: 700; color: var(--accent); margin-bottom: 14px; }
.lede { font-size: 1.2rem; max-width: 720px; margin: 0 auto 28px; }
.cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.meta { font-size: 0.88rem; margin-top: 18px; }
.hero-shot { margin-top: 48px; }

/* App window frame */
.window { margin: 0; border-radius: 12px; overflow: hidden; background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow); }
.window-bar { display: flex; gap: 7px; padding: 10px 12px; background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.window-bar span { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; }
.window-bar span:nth-child(2) { background: #febc2e; }
.window-bar span:nth-child(3) { background: #28c840; }
.window.small { margin-top: 20px; max-width: 520px; }

/* Pillars */
.pillars { padding: 40px 0 24px; }
.grid-4 { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.pillar { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.pillar p { margin: 0; font-size: 0.95rem; }
.pi { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 10px; margin-bottom: 12px;
  background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); font-size: 1.2rem; font-weight: 700; }

/* Sections */
section { padding: 64px 0; }
.why { padding-top: 40px; }
.why p { font-size: 1.12rem; }

/* Features */
.feature { display: grid; gap: 40px; align-items: center; grid-template-columns: 1fr; padding: 36px 0; }
@media (min-width: 900px) {
  .feature { grid-template-columns: 0.9fr 1.1fr; }
  .feature.reverse .feature-text { order: 2; }
}
.tag { display: inline-block; font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em;
  padding: 4px 10px; border-radius: 999px; margin-bottom: 14px; }
.tag-orange { color: var(--orange); background: color-mix(in srgb, var(--orange) 14%, transparent); }
.tag-pink { color: var(--pink); background: color-mix(in srgb, var(--pink) 14%, transparent); }
.tag-blue { color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); }
.tag-indigo { color: var(--indigo); background: color-mix(in srgb, var(--indigo) 16%, transparent); }
.ticks { list-style: none; padding: 0; margin: 0 0 1em; }
.ticks li { position: relative; padding-left: 28px; margin-bottom: 10px; color: var(--text-soft); }
.ticks li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--green); font-weight: 700; }

/* Sync illustration */
.sync-demo { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: center;
  padding: 26px; border-radius: 18px; background: var(--bg-soft); border: 1px solid var(--line); }
.side { padding: 18px; border-radius: 12px; background: var(--card); border: 1px solid var(--line); display: flex; flex-direction: column; gap: 6px; }
.side strong { font-size: 1.15rem; }
.side small { color: var(--text-soft); font-size: 0.82rem; line-height: 1.4; }
.side.dest { border: 2px solid var(--indigo); background: color-mix(in srgb, var(--indigo) 7%, var(--card)); }
.side.dest small { color: var(--indigo); }
.role { align-self: flex-start; font-size: 0.7rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.06em;
  padding: 2px 8px; border-radius: 999px; background: var(--bg-soft); color: var(--text-soft); }
.dest .role { background: var(--indigo); color: #fff; }
.arrow { width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; background: var(--indigo); color: #fff; font-size: 1.6rem; font-weight: 700; }
.sync-kinds { grid-column: 1 / -1; list-style: none; padding: 0; margin: 6px 0 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 8px 18px; font-size: 0.92rem; color: var(--text-soft); }
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 8px; }
.dot.green { background: var(--green); } .dot.orange { background: var(--orange); } .dot.blue { background: var(--accent); } .dot.purple { background: var(--purple); }
@media (max-width: 560px) {
  .sync-demo { grid-template-columns: 1fr; }
  .arrow { transform: rotate(90deg); justify-self: center; }
}

.mini-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); margin-top: 40px; }
.mini { padding: 22px; border-radius: var(--radius); background: var(--bg-soft); }
.mini p { margin: 0; font-size: 0.95rem; }

/* Safety */
.safety { background: var(--bg-soft); }
.split { display: grid; gap: 40px; grid-template-columns: 1fr; align-items: start; }
@media (min-width: 900px) { .split { grid-template-columns: 1fr 1fr; } }
.tree { margin: 0; padding: 18px 20px; border-radius: 12px; background: #15171c; color: #e8eaf0; overflow-x: auto;
  font: 0.85rem/1.65 ui-monospace, "SF Mono", Menlo, monospace; }
.t-dim { color: #8b90a0; }

/* Steps */
.steps { list-style: none; padding: 0; margin: 36px 0 0; display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.steps li { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.steps p { margin: 0; }
.num { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; margin-bottom: 12px;
  background: var(--accent); color: var(--accent-ink); font-weight: 700; }

/* Tech */
.tech { background: var(--bg-soft); }
.tech-list dt { font-weight: 700; margin-top: 18px; }
.tech-list dd { margin: 4px 0 0; color: var(--text-soft); }

/* Download */
.download img { margin: 0 auto 16px; }
.download p { font-size: 1.1rem; }

/* FAQ */
.faq details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 1.05rem; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--text-soft); font-weight: 400; font-size: 1.3rem; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 12px 0 0; }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 28px 0; font-size: 0.92rem; }
.footer-inner { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; justify-content: space-between; }
.footer-inner span { display: flex; align-items: center; gap: 8px; }
.footer nav { display: flex; gap: 18px; }
.footer nav a { color: var(--text-soft); }

/* Plain pages (privacy, 404) */
.page { padding: 56px 0 72px; }
.page h1 { font-size: clamp(2rem, 4vw, 2.8rem); }
.page h2 { font-size: 1.3rem; margin-top: 1.6em; }