/* Shared design tokens - ported from the Android app's cyan/dark "scanner"
   theme (see android/app/src/main/kotlin/.../ui/Theme.kt), which itself
   extends the existing brand mark (brand-assets/cut-to-the-chase-mark.svg).
   App and site intentionally share one palette. */
:root {
  --bg: #121416;
  --surface: #1a1c1e;
  --surface-alt: #1e2022;
  --surface-high: #282a2c;
  --surface-lowest: #0c0e10;
  --border: #3b494c;
  --border-soft: rgba(59, 73, 76, 0.5);
  --text: #e2e2e5;
  --text-muted: #bac9cc;
  --text-faint: #849396;
  --primary: #00daf3;
  --primary-bright: #00e5ff;
  --on-primary: #00363d;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-sans: "Hanken Grotesk", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", monospace;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.5;
  background-image:
    linear-gradient(to bottom, transparent 50%, rgba(0, 218, 243, 0.03) 51%);
  background-size: 100% 4px;
}

a {
  color: inherit;
}

img,
svg {
  max-width: 100%;
  display: block;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(18, 20, 22, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-soft);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--primary);
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
}

.brand img {
  width: 28px;
  height: 28px;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--primary);
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
}

.btn-primary:hover {
  background: var(--primary-bright);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: rgba(0, 218, 243, 0.4);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(0, 218, 243, 0.08);
}

/* Hero */
.hero {
  padding: 96px 0 72px;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

@media (max-width: 860px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-actions,
  .badge {
    justify-content: center;
  }
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(0, 218, 243, 0.35);
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
}

.hero h1 .accent {
  color: var(--primary);
  display: block;
}

.hero p.lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 46ch;
  margin: 0 0 32px;
}

@media (max-width: 860px) {
  .hero p.lead {
    margin-left: auto;
    margin-right: auto;
  }
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* Radar hero graphic - reuses the same rotating-sweep + pulsing-node visual
   built for the Android app's RadarScanner composable, as CSS instead of
   Compose. Stands in for a device screenshot we don't have yet. */
.radar {
  position: relative;
  width: min(340px, 80vw);
  aspect-ratio: 1;
  margin: 0 auto;
  border-radius: 50%;
}

.radar-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(0, 218, 243, 0.25);
}

.radar-ring.r2 {
  inset: 15%;
  border-color: rgba(0, 218, 243, 0.18);
}

.radar-ring.r3 {
  inset: 32%;
  border-color: rgba(0, 218, 243, 0.12);
}

.radar-sweep {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg, rgba(0, 218, 243, 0.5), transparent 35%, transparent 100%);
  animation: sweep 3s linear infinite;
}

.radar-node {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 24px 4px rgba(0, 218, 243, 0.8);
  animation: pulse 1.6s ease-in-out infinite alternate;
}

@keyframes sweep {
  to {
    transform: rotate(360deg);
  }
}

@keyframes pulse {
  from {
    opacity: 0.6;
    box-shadow: 0 0 12px 2px rgba(0, 218, 243, 0.5);
  }
  to {
    opacity: 1;
    box-shadow: 0 0 28px 6px rgba(0, 218, 243, 0.9);
  }
}

/* Section headings */
.section {
  padding: 64px 0;
}

.section-title {
  text-align: center;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: -0.01em;
  margin: 0 0 40px;
}

.section-title .accent {
  color: var(--primary);
}

.eyebrow {
  display: block;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  margin-bottom: 10px;
}

/* Capability cards */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 780px) {
  .cards {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--surface-alt);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(0, 218, 243, 0.12);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-weight: 700;
}

.card h3 {
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 10px;
}

.card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 0;
}

/* Protocol steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  text-align: center;
}

@media (max-width: 780px) {
  .steps {
    grid-template-columns: 1fr;
  }
}

.step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(0, 218, 243, 0.4);
  color: var(--primary);
  font-family: var(--font-mono);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.step h3 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 8px;
}

.step p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* Callout */
.callout {
  border: 1px solid rgba(0, 218, 243, 0.3);
  border-top: 3px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  background: var(--surface-alt);
}

.callout h3 {
  margin: 0 0 14px;
  font-size: 1.3rem;
}

.callout p {
  color: var(--text-muted);
  max-width: 60ch;
  margin: 0 auto 20px;
}

.tags {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
}

.tags span {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  color: var(--text-muted);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-soft);
  padding: 32px 0;
  margin-top: 40px;
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-faint);
}

.footer-links a:hover {
  color: var(--primary);
}

/* Legal pages (privacy/terms) */
.legal {
  padding: 64px 0 96px;
}

.legal .container {
  max-width: 720px;
}

.legal h1 {
  font-size: 2rem;
  margin-bottom: 4px;
}

.legal .updated {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  margin-bottom: 40px;
}

.legal h2 {
  font-size: 1.15rem;
  margin-top: 40px;
  color: var(--primary);
}

.legal p,
.legal li {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.legal a {
  color: var(--primary);
}