:root {
  color-scheme: dark;
  --bg: #0f1112;
  --panel: #161a1e;
  --panel-soft: #1b2025;
  --border: #2a3138;
  --text: #f1eee8;
  --muted: #9ba09a;
  --green: #3d9e57;
  --green-soft: rgba(61, 158, 87, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 24px;
  background:
    radial-gradient(circle at top, rgba(61, 158, 87, 0.18), transparent 38%),
    linear-gradient(180deg, #101315 0%, var(--bg) 100%);
  color: var(--text);
  font-family: "Segoe UI", Inter, Arial, sans-serif;
}

main {
  width: min(100%, 920px);
  margin: 0 auto;
  padding: 28px;
  border-radius: 28px;
  border: 1px solid var(--border);
  background: rgba(22, 26, 30, 0.96);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.28);
}

header {
  display: grid;
  gap: 18px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0;
}

.app-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.22);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

nav a,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--panel-soft);
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

.button.primary {
  border-color: transparent;
  background: var(--green);
}

.app-download-cta {
  min-height: 52px;
  padding: 0 22px;
  font-size: 18px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.02;
}

.page-title {
  font-size: 32px;
  line-height: 1.15;
}

h2 {
  margin: 0 0 12px;
  font-size: 24px;
  line-height: 1.15;
}

h3 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.2;
}

p,
li {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.55;
}

p {
  margin: 0 0 14px;
}

ul,
ol {
  margin: 0;
  padding-left: 22px;
}

li + li {
  margin-top: 8px;
}

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

section {
  padding: 26px 0;
  border-bottom: 1px solid var(--border);
}

section:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.summary {
  max-width: 760px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 19px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.card {
  min-height: 100%;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--panel-soft);
}

.notice {
  padding: 16px;
  border: 1px solid rgba(61, 158, 87, 0.42);
  border-radius: 18px;
  background: var(--green-soft);
}

.steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.screenshot {
  display: block;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: #0d1012;
}

footer {
  width: min(100%, 920px);
  margin: 18px auto 0;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

@media (max-width: 720px) {
  body {
    padding: 14px;
  }

  main {
    padding: 20px;
    border-radius: 22px;
  }

  .grid,
  .steps {
    grid-template-columns: 1fr;
  }
}