:root {
  color-scheme: dark light;
  --bg: #0b0b12;
  --surface: #151522;
  --border: #2a2a3d;
  --text: #ececf4;
  --muted: #a0a0b8;
  --accent: #7c6cf6;
  --accent-text: #ffffff;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f5fa;
    --surface: #ffffff;
    --border: #dcdce8;
    --text: #16161f;
    --muted: #5c5c70;
    --accent: #5b4de0;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px 16px;
  background: var(--bg);
  color: var(--text);
  font:
    15px/1.6 system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
}

.card {
  width: 100%;
  max-width: 34rem;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
}

.brand {
  margin: 0 0 8px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0 0 12px;
  font-size: 1.45rem;
  line-height: 1.3;
}

.steps {
  margin: 20px 0;
  padding-left: 1.2rem;
}

.steps li {
  margin-bottom: 18px;
}

.steps p {
  margin: 4px 0 10px;
}

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

.small {
  font-size: 0.85rem;
}

button,
.button {
  display: inline-block;
  padding: 9px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.primary,
#download:not(:disabled) {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-text);
}

.link {
  padding: 0;
  border: 0;
  color: var(--accent);
  font-weight: 500;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}