/*
 * Dark only, like the app. The blue-to-indigo gradient comes from the icon. System fonts on
 * purpose: a web font from Google would send each visitor's IP to Google, on the page that says
 * there is no tracking.
 */
:root {
  color-scheme: dark;
  --bg: #05060a;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #f5f5f7;
  --text-soft: rgba(245, 245, 247, 0.78);
  --muted: #8e8e93;
  --blue: #2f8cff;
  --indigo: #5b5cf0;
  --cyan: #5ac8fa;
  --gradient: linear-gradient(135deg, var(--cyan) 0%, var(--blue) 45%, var(--indigo) 100%);
  --radius: 22px;
  --width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  position: relative;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font:
    17px/1.65 -apple-system,
    BlinkMacSystemFont,
    'SF Pro Text',
    'Segoe UI',
    Roboto,
    'Helvetica Neue',
    Arial,
    sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* Glow behind the top of every page. */
body::before {
  content: '';
  position: absolute;
  inset: -200px 0 auto;
  height: 900px;
  background:
    radial-gradient(600px 380px at 50% 30%, rgba(47, 140, 255, 0.28), transparent 70%),
    radial-gradient(520px 340px at 78% 18%, rgba(91, 92, 240, 0.22), transparent 70%),
    radial-gradient(420px 300px at 20% 20%, rgba(90, 200, 250, 0.12), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid transparent;
  background: rgba(5, 6, 10, 0.6);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom-color: var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--width);
  height: 60px;
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 650;
  letter-spacing: -0.01em;
}

.brand:hover {
  text-decoration: none;
}

.brand img {
  border-radius: 8px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
}

.nav-links a {
  color: var(--text-soft);
}

.nav-links a:hover,
.nav-links a[aria-current='page'] {
  color: var(--text);
  text-decoration: none;
}

.nav-links .lang {
  padding: 4px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* Home */

.hero {
  max-width: 820px;
  margin: 0 auto;
  padding: 96px 24px 72px;
  text-align: center;
}

.hero-icon {
  display: block;
  margin: 0 auto 32px;
  border-radius: 28px;
  box-shadow:
    0 0 0 1px var(--border-strong),
    0 24px 80px -12px rgba(47, 140, 255, 0.55);
}

.eyebrow {
  display: inline-block;
  margin: 0 0 20px;
  padding: 6px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0;
  font-size: clamp(40px, 7vw, 68px);
  font-weight: 750;
  line-height: 1.05;
  letter-spacing: -0.035em;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  max-width: 620px;
  margin: 24px auto 0;
  color: var(--text-soft);
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.55;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
  transition:
    background 0.2s,
    transform 0.2s;
}

.button:hover {
  background: var(--surface-hover);
  text-decoration: none;
  transform: translateY(-1px);
}

.button.primary {
  border-color: transparent;
  background: var(--gradient);
  box-shadow: 0 10px 30px -10px rgba(47, 140, 255, 0.7);
}

.section {
  max-width: var(--width);
  margin: 0 auto;
  padding: 0 24px 96px;
}

.section-title {
  max-width: 640px;
  margin: 0 auto 40px;
  text-align: center;
}

.section-title h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.section-title p {
  margin: 0;
  color: var(--text-soft);
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition:
    border-color 0.2s,
    background 0.2s,
    transform 0.2s;
}

.feature:hover {
  border-color: var(--border-strong);
  background: var(--surface-hover);
  transform: translateY(-2px);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 20px;
  border-radius: 12px;
  background: var(--gradient);
  box-shadow: 0 8px 24px -8px rgba(47, 140, 255, 0.6);
}

.feature-icon svg {
  width: 22px;
  height: 22px;
  stroke: #fff;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.feature p {
  margin: 0;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.6;
}

/* Privacy panel on the home page. */
.panel {
  position: relative;
  overflow: hidden;
  padding: clamp(32px, 6vw, 64px);
  border: 1px solid var(--border-strong);
  border-radius: 28px;
  background:
    radial-gradient(500px 260px at 100% 0%, rgba(91, 92, 240, 0.25), transparent 70%),
    radial-gradient(500px 260px at 0% 100%, rgba(47, 140, 255, 0.18), transparent 70%), var(--surface);
  text-align: center;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.panel > p {
  max-width: 560px;
  margin: 0 auto;
  color: var(--text-soft);
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.stats li {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(5, 6, 10, 0.45);
}

.stats strong {
  display: block;
  font-size: 30px;
  font-weight: 750;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.stats span {
  color: var(--muted);
  font-size: 14px;
}

/* Policy and terms */

.doc {
  max-width: 740px;
  margin: 0 auto;
  padding: 72px 24px 32px;
}

.doc h1 {
  font-size: clamp(36px, 6vw, 52px);
}

.updated {
  margin: 16px 0 40px;
  color: var(--muted);
  font-size: 14px;
}

.callout {
  margin: 0 0 48px;
  padding: 24px 28px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background:
    linear-gradient(var(--bg), var(--bg)) padding-box,
    linear-gradient(135deg, rgba(90, 200, 250, 0.6), rgba(91, 92, 240, 0.6)) border-box;
}

.doc .callout h2 {
  margin: 0 0 8px;
  padding: 0;
  border: 0;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.callout p {
  margin: 0;
  color: var(--text);
  font-size: 18px;
}

.doc h2 {
  margin: 48px 0 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 22px;
  font-weight: 650;
  letter-spacing: -0.015em;
}

.doc p,
.doc li {
  color: var(--text-soft);
}

.doc ul {
  padding-left: 20px;
}

.doc li {
  margin-bottom: 10px;
}

.doc li::marker {
  color: var(--blue);
}

.doc strong {
  color: var(--text);
  font-weight: 600;
}

code {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--surface-hover);
  font:
    0.88em ui-monospace,
    'SF Mono',
    Menlo,
    monospace;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--width);
  margin: 0 auto;
  padding: 32px 24px 48px;
  color: var(--muted);
  font-size: 14px;
}

.footer-inner > span a {
  color: var(--text-soft);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links a {
  color: var(--text-soft);
}

@media (max-width: 900px) {
  .features {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .features {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .nav {
    padding: 0 16px;
  }

  .nav-links {
    gap: 14px;
  }

  .hero {
    padding: 64px 16px 56px;
  }

  .section,
  .doc {
    padding-left: 16px;
    padding-right: 16px;
  }

  .doc {
    padding-top: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button,
  .feature {
    transition: none;
  }

  .button:hover,
  .feature:hover {
    transform: none;
  }
}