:root {
  color-scheme: dark;
  --bg: #1a1a1a;
  --bg-elevated: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.12);
  --text: #f5f5f7;
  --text-secondary: rgba(255, 255, 255, 0.62);
  --text-tertiary: rgba(255, 255, 255, 0.42);
  --accent: #ffffff;
  --radius-lg: 16px;
  --radius-sm: 8px;
  --max-width: 920px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(255, 255, 255, 0.08), transparent),
    var(--bg);
}

a {
  color: inherit;
}

.page {
  width: min(100% - 32px, var(--max-width));
  margin: 0 auto;
  padding: 72px 0 48px;
}

.hero {
  text-align: center;
  margin-bottom: 72px;
}

.hero__icon {
  display: block;
  margin: 0 auto 20px;
  border-radius: 22px;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.08),
    0 24px 48px rgba(0, 0, 0, 0.45);
}

.hero__eyebrow {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.hero__title {
  margin: 0;
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
}

.hero__tagline {
  margin: 8px 0 0;
  font-size: 1.125rem;
  color: var(--text-secondary);
}

.hero__lede {
  max-width: 38rem;
  margin: 20px auto 0;
  color: var(--text-secondary);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 28px;
}

.hero__requirements {
  margin: 16px 0 0;
  font-size: 13px;
  color: var(--text-tertiary);
}

.btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 200px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}

.btn--primary {
  background: var(--accent);
  color: #111;
}

.btn--primary:hover {
  background: #e8e8ed;
}

.btn--primary.is-disabled {
  pointer-events: none;
  opacity: 0.55;
}

.btn--secondary {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
}

.btn--secondary:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.12);
}

.btn__meta {
  margin-top: 2px;
  font-size: 12px;
  font-weight: 400;
  opacity: 0.72;
}

.section-title {
  margin: 0 0 20px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.features {
  margin-bottom: 56px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-card {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
}

.feature-card h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
}

.feature-card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
}

.how-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.how-grid h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
}

.how-grid p {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
}

.footer {
  padding: 24px 16px 40px;
  text-align: center;
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer a:hover {
  color: var(--text);
}

@media (max-width: 600px) {
  .page {
    padding-top: 48px;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }
}