:root {
  --bg: #0b0f17;
  --panel: #111827;
  --line: #1f2937;
  --text: #f1f5f9;
  --muted: #a3adbd;
  --amber: #fbbf24;
  --green: #0a7f46;
  --green-hover: #0c9653;
  color-scheme: dark;
}
* {
  box-sizing: border-box;
}
html {
  font-size: 19px;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    sans-serif;
  line-height: 1.6;
}
main {
  max-width: 46rem;
  margin: 0 auto;
  padding: 3rem 1rem 2rem;
}
a {
  color: var(--amber);
}
a:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}
h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 0.5rem;
}
h2 {
  font-size: 1.4rem;
  margin-top: 2.5rem;
}
h3 {
  font-size: 1.05rem;
}
.hero {
  text-align: center;
}
.logo {
  border-radius: 22px;
}
.hero h1 {
  font-size: 2.6rem;
  margin-top: 0.75rem;
}
.tagline {
  font-size: 1.3rem;
  color: var(--muted);
  margin: 0;
}
.intro {
  margin-top: 2rem;
}
.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1rem 0 1.5rem;
}
.button {
  flex: 1 1 15rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem 1.25rem;
  border-radius: 14px;
  border: 2px solid var(--line);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  min-height: 4.5rem;
  justify-content: center;
}
.button:hover {
  border-color: var(--amber);
}
.button.primary {
  background: var(--green);
  border-color: var(--green);
}
.button.primary:hover {
  background: var(--green-hover);
  border-color: var(--green-hover);
}
.button .label {
  font-size: 1.15rem;
  font-weight: 650;
}
.button .detail {
  font-size: 0.85rem;
  color: var(--muted);
}
.button.primary .detail {
  color: #d1fae5;
}
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem 2rem;
}
.steps p,
.note {
  margin: 0;
  color: var(--muted);
}
.note {
  margin-top: 1rem;
}
.screenshot {
  margin: 2.5rem 0 0;
}
.screenshot img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--line);
  display: block;
}
footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 1rem 2.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.5rem;
  font-size: 0.9rem;
  color: var(--muted);
}
.policy main {
  max-width: 42rem;
}
.policy li {
  margin-bottom: 0.4rem;
}