:root {
  color-scheme: dark;
  --bg: #0b0b0f;
  --bg-elev: #14141c;
  --border: #23232e;
  --text: #e9e9f0;
  --muted: #a0a0b0;
  --accent: #8ab4ff;
  --accent-grad-a: #7c5cff;
  --accent-grad-b: #29d0d0;
  --radius: 16px;
  --maxw: 960px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Top navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(140%) blur(12px);
  background: rgba(11, 11, 15, 0.72);
  border-bottom: 1px solid var(--border);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.nav__links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav__links a {
  color: var(--muted);
  font-size: 15px;
}

.nav__links a:hover {
  color: var(--text);
  text-decoration: none;
}

/* Hero */
.hero {
  position: relative;
  text-align: center;
  padding: 96px 0 72px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40% 0 auto 0;
  height: 520px;
  background: radial-gradient(
      60% 60% at 30% 20%,
      rgba(124, 92, 255, 0.35),
      transparent 70%
    ),
    radial-gradient(
      50% 50% at 80% 10%,
      rgba(41, 208, 208, 0.28),
      transparent 70%
    );
  filter: blur(30px);
  pointer-events: none;
}

.hero__icon {
  width: 104px;
  height: 104px;
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(124, 92, 255, 0.35);
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.05;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--accent-grad-a), var(--accent-grad-b));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.tagline {
  font-size: clamp(17px, 2.5vw, 22px);
  color: var(--muted);
  max-width: 620px;
  margin: 0 auto 36px;
}

/* App Store badge / buttons */
.cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 16px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

.btn--primary {
  background: #fff;
  color: #0b0b0f;
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.12);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

/* Feature grid */
.features {
  padding: 64px 0;
}

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

.feature {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: #fff;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

/* Legal document layout */
.doc {
  padding: 56px 0 96px;
  max-width: 760px;
}

.doc h1 {
  font-size: clamp(28px, 5vw, 38px);
  margin: 0 0 8px;
}

.doc .updated {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 24px;
}

.doc h2 {
  font-size: 20px;
  margin: 36px 0 10px;
  color: #fff;
}

.doc p,
.doc li {
  color: #c4c4d0;
}

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

.notice {
  margin: 24px 0 0;
  padding: 16px 18px;
  border-radius: 12px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: #c9c9d6;
  font-size: 14px;
}

.notice strong {
  color: #fff;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  color: var(--muted);
  font-size: 14px;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

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

.footer__links a {
  color: var(--muted);
}

.footer__links a:hover {
  color: var(--text);
}

/* Responsive */
@media (max-width: 720px) {
  .features__grid {
    grid-template-columns: 1fr;
  }

  .nav__links {
    gap: 16px;
  }

  .hero {
    padding: 72px 0 56px;
  }
}

@media (max-width: 420px) {
  .nav__links a:not(.nav__cta) {
    display: none;
  }
}