/* Switchback marketing site — Expedition design language (matches the app) */
:root {
  --bg: #0E1411;
  --bg-1: #131C16;
  --bg-2: #1B2620;
  --border: #22322A;
  --border-soft: #1a271f;
  --text: #E8EFE9;
  --dim: #7E948A;
  --tint: #4FDD8B;      /* signal green — actions */
  --signal: #DCFF5E;    /* chartreuse — live data */
  --story: #6BD6E3;     /* cyan — stories/info */
  --maxw: 1120px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.mono { font-family: 'IBM Plex Mono', ui-monospace, monospace; }
.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12.5px; font-weight: 500; letter-spacing: .18em; text-transform: uppercase;
  color: var(--signal);
}

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14,20,17,.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .04em; font-size: 17px; }
.brand .mark { width: 26px; height: 26px; border-radius: 6px; box-shadow: 0 0 0 1px rgba(255,255,255,.06); }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { color: var(--dim); font-size: 15px; transition: color .2s; }
.nav-links a:hover { color: var(--text); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 15px;
  padding: 11px 20px; border-radius: 12px; border: 1px solid transparent;
  cursor: pointer; transition: transform .15s var(--ease), box-shadow .2s, background .2s;
}
.btn-primary { background: var(--tint); color: #06120B; box-shadow: 0 0 0 1px rgba(79,221,139,.3), 0 8px 30px -8px rgba(79,221,139,.5); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 0 0 1px rgba(79,221,139,.5), 0 12px 38px -8px rgba(79,221,139,.6); }
.btn-ghost { border-color: var(--border); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--tint); color: var(--tint); }
.nav .btn { padding: 9px 16px; }

/* ---------- topo backdrop ---------- */
.topo { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.topo svg { position: absolute; width: 140%; height: 140%; top: -20%; left: -20%; opacity: .5; }
.topo path { fill: none; stroke: var(--border); stroke-width: 1.2; }

/* ---------- hero ---------- */
.hero { position: relative; padding: 84px 0 72px; }
.hero .wrap { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.hero h1 {
  font-size: clamp(38px, 5.4vw, 62px); line-height: 1.04; letter-spacing: -.02em;
  font-weight: 700; margin: 18px 0 20px;
}
.hero h1 .hl { color: var(--tint); }
.hero p.sub { font-size: 19px; color: var(--dim); max-width: 30ch; margin: 0 0 30px; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.trust { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 26px; }
.trust span { font-family: 'IBM Plex Mono', monospace; font-size: 12.5px; color: var(--dim); display: flex; align-items: center; gap: 7px; }
.trust span::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--tint); }

/* phone mockup */
.device-wrap { display: flex; justify-content: center; position: relative; }
.device {
  width: 300px; max-width: 78vw; border-radius: 40px; padding: 10px;
  background: linear-gradient(160deg, #202e26, #0c1410);
  border: 1px solid #2c3d33;
  box-shadow: 0 40px 90px -30px rgba(0,0,0,.8), 0 0 0 1px rgba(0,0,0,.4);
}
.device .screen { border-radius: 31px; overflow: hidden; background: #0b0f0d; aspect-ratio: 300/620; }

/* ---------- sections ---------- */
section { position: relative; }
.band { padding: 84px 0; border-top: 1px solid var(--border-soft); }
.section-head { max-width: 640px; margin-bottom: 12px; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 40px); line-height: 1.1; letter-spacing: -.015em; margin: 14px 0 0; }

/* feature rows */
.feature { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; padding: 60px 0; border-top: 1px solid var(--border-soft); }
.feature:first-of-type { border-top: none; }
.feature.flip .fig { order: -1; }
.feature h3 { font-size: clamp(24px, 3vw, 32px); letter-spacing: -.01em; margin: 14px 0 14px; line-height: 1.12; }
.feature p { color: var(--dim); margin: 0 0 18px; font-size: 17px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--text);
  border: 1px solid var(--border); border-radius: 999px; padding: 6px 12px; background: var(--bg-1);
}
.fig {
  background: var(--bg-1); border: 1px solid var(--border); border-radius: 20px;
  aspect-ratio: 4/3; overflow: hidden; position: relative;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.02);
}
.fig svg { width: 100%; height: 100%; }

/* ---------- privacy band ---------- */
.pill-band { text-align: center; }
.pill-band .lock { width: 54px; height: 54px; margin: 0 auto 20px; color: var(--tint); }
.pill-band h2 { font-size: clamp(28px, 3.6vw, 40px); margin: 0 0 14px; letter-spacing: -.015em; }
.pill-band p { color: var(--dim); max-width: 52ch; margin: 0 auto 8px; }
.priv-row { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; margin: 28px 0 6px; }
.priv-row .chip { background: transparent; }

/* ---------- ethos / pricing ---------- */
.ethos { text-align: center; background:
  radial-gradient(120% 100% at 50% 0%, rgba(79,221,139,.06), transparent 60%); }
.ethos h2 { font-size: clamp(30px, 4.4vw, 50px); letter-spacing: -.02em; margin: 14px 0 16px; line-height: 1.06; }
.ethos h2 .hl { color: var(--tint); }
.ethos p { color: var(--dim); max-width: 46ch; margin: 0 auto 30px; }

/* ---------- final cta ---------- */
.final { text-align: center; padding: 100px 0; }
.final h2 { font-size: clamp(32px, 5vw, 54px); letter-spacing: -.02em; margin: 0 0 18px; }
.final p { color: var(--dim); margin: 0 auto 30px; max-width: 40ch; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--border-soft); padding: 40px 0; color: var(--dim); }
footer .wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
footer .flinks { display: flex; gap: 24px; font-size: 14px; }
footer .flinks a:hover { color: var(--text); }
footer .fine { font-family: 'IBM Plex Mono', monospace; font-size: 12px; }

/* ---------- prose (privacy page) ---------- */
.prose { max-width: 720px; margin: 0 auto; padding: 60px 0 90px; }
.prose h1 { font-size: clamp(32px, 5vw, 46px); letter-spacing: -.02em; margin: 8px 0 6px; }
.prose .updated { font-family: 'IBM Plex Mono', monospace; font-size: 13px; color: var(--dim); margin-bottom: 34px; }
.prose h2 { font-size: 22px; margin: 40px 0 12px; letter-spacing: -.01em; }
.prose p, .prose li { color: #c9d6cd; }
.prose strong { color: var(--text); }
.prose ul { padding-left: 22px; }
.prose li { margin: 8px 0; }
.prose a { color: var(--tint); text-decoration: underline; text-underline-offset: 3px; }
.back { display: inline-flex; align-items: center; gap: 8px; color: var(--dim); font-size: 14px; margin-bottom: 24px; }
.back:hover { color: var(--tint); }

/* ---------- reveal (progressive enhancement: visible by default, hidden only
   when JS is confirmed active, so a JS/observer hiccup never blanks the page) */
.reveal { transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal { opacity: 0; transform: translateY(18px); }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero p.sub { margin-left: auto; margin-right: auto; }
  .cta-row, .trust { justify-content: center; }
  .device-wrap { order: -1; }
  .feature { grid-template-columns: 1fr; gap: 28px; padding: 48px 0; }
  .feature.flip .fig { order: 0; }
  .chips { justify-content: flex-start; }
  .nav-links a:not(.btn) { display: none; }
}
@media (max-width: 480px) {
  body { font-size: 16px; }
  .band { padding: 64px 0; }
}