:root {
  --bg: #101418;
  --card: #1a2027;
  --text: #e6e9ec;
  --muted: #9aa4ae;
  --accent: #4ade80;
  --border: #2a323b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}

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

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 32px;
}

header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
}

header img {
  width: 44px;
  height: 44px;
}

header a {
  color: var(--text);
  text-decoration: none;
  font-size: 1.4rem;
  font-weight: 700;
}

h1 {
  font-size: 2.2rem;
  line-height: 1.2;
  margin: 0 0 16px;
}

h2 {
  font-size: 1.25rem;
  margin: 40px 0 12px;
}

.lead {
  font-size: 1.15rem;
  color: var(--muted);
  margin: 0 0 28px;
}

.button {
  display: inline-block;
  background: var(--accent);
  color: #0b0f12;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 999px;
  text-decoration: none;
}

.button.disabled {
  background: var(--border);
  color: var(--muted);
}

.note {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 10px;
}

.screens {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 240px));
  gap: 16px;
  margin-top: 36px;
}

.screens img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  border: 1px solid var(--border);
}

.features {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 12px;
}

.features li {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
}

.features strong {
  display: block;
}

footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

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