:root {
  --bg: #ffffff;
  --bg-soft: #f5f6f8;
  --fg: #1d1f24;
  --muted: #5f6672;
  --border: #e3e6eb;
  --accent: #f5a400;
  --accent-ink: #1d1f24;
  --link: #a86e00;
  --hero: radial-gradient(circle at 75% 20%, #2b3550 0%, #151a26 65%);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151f;
    --bg-soft: #1a2030;
    --fg: #e8eaed;
    --muted: #a5adbb;
    --border: #2a3142;
    --link: #f5a400;
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

img {
  max-width: 100%;
  height: auto;
}

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 16px;
}

.narrow {
  max-width: 700px;
}

/* nav */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: inherit;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 20px;
  font-size: 15px;
}

.nav-links a {
  color: inherit;
  text-decoration: none;
  opacity: 0.8;
}

.nav-links a:hover {
  opacity: 1;
}

.on-dark {
  color: #fff;
}

/* hero */
.hero {
  background: var(--hero);
  color: #fff;
  padding-bottom: 64px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 48px;
  align-items: center;
  padding-top: 40px;
}

.hero h1 {
  font-size: clamp(36px, 5.5vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero p {
  font-size: 19px;
  color: #b4bccb;
  margin: 0 0 28px;
}

.hero-shot {
  border-radius: 14px;
  box-shadow: 0 30px 80px rgb(0 0 0 / 0.45);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  text-decoration: none;
}

.btn[aria-disabled="true"] {
  opacity: 0.85;
  cursor: default;
}

.fine {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  color: #8f98aa;
}

/* sections */
section {
  padding: 72px 0;
}

section h2 {
  font-size: 30px;
  letter-spacing: -0.01em;
  margin: 0 0 28px;
}

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

.card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-soft);
}

.card h3 {
  margin: 0 0 6px;
  font-size: 18px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.steps {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}

.steps ol {
  margin: 0;
  padding-left: 22px;
}

.steps li {
  margin-bottom: 12px;
}

.soft {
  background: var(--bg-soft);
}

/* documents (privacy / support) */
.doc {
  padding: 40px 0 80px;
}

.doc h1 {
  font-size: 36px;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
}

.doc h2 {
  font-size: 20px;
  margin: 36px 0 8px;
}

.updated {
  color: var(--muted);
  margin: 8px 0 0;
}

details {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  margin-bottom: 12px;
  background: var(--bg-soft);
}

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

details p {
  margin: 10px 0 0;
  color: var(--muted);
}

/* footer */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
  font-size: 15px;
  color: var(--muted);
}

footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

footer nav {
  display: flex;
  gap: 18px;
}

@media (max-width: 760px) {
  .hero-grid,
  .steps,
  .features {
    grid-template-columns: 1fr;
  }
  .nav-links {
    gap: 14px;
  }
  section {
    padding: 52px 0;
  }
}