:root {
  color-scheme: light dark;
  --bg-page: #0f1410;
  --bg-card: #ffffff;
  --text-main: #111827;
  --text-muted: #4b5563;
  --border-subtle: #e5e7eb;
  --accent: #16a34a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-card: #111827;
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    --border-subtle: #1f2937;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #111827 0, #020617 40%, #000 100%);
  color: var(--text-main);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px 16px;
}

.page {
  width: 100%;
  max-width: 900px;
  background: rgba(15, 23, 42, 0.96);
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 24px 20px 28px;
  color: #e5e7eb;
  box-shadow:
    0 18px 45px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(15, 23, 42, 0.9);
}

@media (min-width: 768px) {
  .page {
    padding: 32px 32px 36px;
  }
}

header {
  margin-bottom: 20px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.5);
  padding-bottom: 16px;
}

h1 {
  font-size: 1.6rem;
  margin: 0 0 6px;
  letter-spacing: 0.03em;
}

.subtitle {
  margin: 0;
  font-size: 0.95rem;
  color: #9ca3af;
  line-height: 1.5;
}

.intro {
  margin: 0;
  font-size: 0.95rem;
  color: #9ca3af;
  line-height: 1.5;
}

.updated {
  margin-top: 8px;
  font-size: 0.8rem;
  color: #9ca3af;
}

.steps {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.4);
  border-radius: 10px;
  padding: 14px 18px;
  margin: 10px 0;
}

.steps p {
  margin: 0 0 6px;
  color: #e5e7eb;
}

.steps p:last-child {
  margin-bottom: 0;
}

main {
  font-size: 0.95rem;
  line-height: 1.7;
  color: #e5e7eb;
}

h2 {
  font-size: 1.05rem;
  margin-top: 20px;
  margin-bottom: 8px;
  color: #f9fafb;
}

p {
  margin-top: 4px;
  margin-bottom: 10px;
  color: #e5e7eb;
}

ul {
  margin: 4px 0 12px 18px;
  padding: 0;
  color: #e5e7eb;
}

li {
  margin-bottom: 4px;
}

strong {
  color: #f9fafb;
  font-weight: 600;
}

.section-note {
  font-size: 0.9rem;
  color: #9ca3af;
}

.contact-block {
  margin-top: 4px;
}

.contact-block p {
  margin-bottom: 4px;
}

a {
  color: #86efac;
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

.brand {
  font-weight: 600;
  color: #bbf7d0;
}

.chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  padding: 2px 10px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #9ca3af;
  margin-top: 8px;
}

footer {
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid rgba(148, 163, 184, 0.4);
  font-size: 0.8rem;
  color: #9ca3af;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px;
}

footer p {
  margin: 0 0 4px;
}