:root {
  --background: #0b0d10;
  --surface: #161a1f;
  --text: #f3f5f7;
  --secondary: #a3acb6;
  --accent: #5ccfe0;
  --highlight: #ffd91a;
  --border: rgba(255, 255, 255, 0.08);
  --radius: 22px;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

a {
  color: var(--accent);
}

main,
header,
footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Site navigation */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  padding-bottom: 20px;
}

.nav .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.nav .brand img {
  width: 32px;
  height: 32px;
}

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

.nav ul a {
  color: var(--secondary);
  text-decoration: none;
}

.nav ul a:hover,
.nav ul a[aria-current="page"] {
  color: var(--text);
}

/* Home page */
.hero {
  text-align: center;
  padding: 48px 0 32px;
}

.hero .icon {
  width: 128px;
  height: 128px;
  filter: drop-shadow(0 12px 32px rgba(92, 207, 224, 0.25));
}

.hero h1 {
  margin: 24px 0 12px;
  font-size: clamp(36px, 7vw, 60px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

/* Echoes the app: found text gets a highlighter-pen yellow. */
mark {
  background: var(--highlight);
  color: #111;
  padding: 0 0.12em;
  border-radius: 0.12em;
}

.hero p {
  max-width: 560px;
  margin: 0 auto;
  color: var(--secondary);
  font-size: 20px;
}

.badge {
  display: inline-block;
  margin-top: 28px;
  padding: 12px 22px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

.screens {
  display: flex;
  gap: 20px;
  margin: 40px -24px 0;
  padding: 0 24px 12px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
}

.screens img {
  flex: 0 0 auto;
  width: 240px;
  border-radius: 28px;
  border: 1px solid var(--border);
  scroll-snap-align: center;
}

section {
  padding: 48px 0 0;
}

section h2 {
  margin: 0 0 20px;
  font-size: 28px;
  letter-spacing: -0.01em;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li,
.features li {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin-bottom: 10px;
  border-radius: 50%;
  background: var(--accent);
  color: #062a30;
  font-weight: 700;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.features h3,
.steps h3 {
  margin: 0 0 6px;
  font-size: 18px;
}

.plus {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 8px;
  border-radius: 999px;
  background: rgba(92, 207, 224, 0.15);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  vertical-align: 2px;
}

.note {
  margin: 20px 0 0;
  color: var(--secondary);
}

.features p,
.steps p {
  margin: 0;
  color: var(--secondary);
}

/* Text pages (privacy, support) */
.page {
  max-width: 720px;
  padding-top: 24px;
  padding-bottom: 24px;
}

.page h1 {
  margin: 0 0 8px;
  font-size: 40px;
  letter-spacing: -0.02em;
}

.page .updated {
  margin: 0 0 32px;
  color: var(--secondary);
}

.page h2 {
  margin: 36px 0 8px;
  font-size: 22px;
}

.page p,
.page li {
  color: #d6dbe0;
}

.page details {
  margin: 0 0 12px;
  padding: 16px 20px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}

.page summary {
  cursor: pointer;
  font-weight: 600;
}

.page details p {
  margin: 10px 0 0;
}

footer {
  margin-top: 64px;
  padding-top: 24px;
  padding-bottom: 40px;
  border-top: 1px solid var(--border);
  color: var(--secondary);
  font-size: 15px;
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 8px;
}

footer a {
  color: var(--secondary);
}

@media (max-width: 520px) {
  .nav ul {
    gap: 14px;
    font-size: 15px;
  }

  .screens img {
    width: 200px;
  }
}