:root {
  --bg: #ffffff;
  --bg-soft: #f5f6f8;
  --fg: #0b0d12;
  --fg-soft: #51596a;
  --accent: #0a7c2e;
  --accent-fg: #ffffff;
  --border: #e3e6ec;
  --radius: 12px;
  --max: 980px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d12;
    --bg-soft: #141821;
    --fg: #e7e9ee;
    --fg-soft: #9aa3b3;
    --accent: #22c55e;
    --accent-fg: #06160c;
    --border: #232838;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--accent); }
.muted { color: var(--fg-soft); font-size: 0.95em; }

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(180%) blur(8px);
  z-index: 10;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  text-decoration: none;
  font-size: 1.05rem;
}
.brand img { border-radius: 8px; }
.topnav { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.topnav a { text-decoration: none; color: var(--fg-soft); font-size: 0.95rem; }
.topnav a:hover { color: var(--accent); }

/* Sections */
main { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
section { padding: 3rem 0; border-bottom: 1px solid var(--border); }
section:last-of-type { border-bottom: 0; }

h1, h2, h3 { line-height: 1.2; margin: 0 0 0.6rem; }
h1 { font-size: clamp(1.85rem, 4.5vw, 2.75rem); letter-spacing: -0.02em; }
h2 { font-size: 1.55rem; letter-spacing: -0.01em; }
h3 { font-size: 1.05rem; }

p { margin: 0 0 0.9rem; }

/* Hero */
.hero { padding-top: 3.5rem; padding-bottom: 3.5rem; text-align: center; }
.hero-icon {
  border-radius: 22px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
  margin-bottom: 1.2rem;
}
.lede {
  max-width: 56ch;
  margin: 0.6rem auto 1.6rem;
  color: var(--fg-soft);
  font-size: 1.1rem;
}
.cta-row {
  display: flex;
  gap: 0.6rem;
  justify-content: center;
  flex-wrap: wrap;
  margin: 1rem 0 0.6rem;
}
.cta-meta { color: var(--fg-soft); font-size: 0.9rem; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.7rem 1.2rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.05s ease, background 0.15s ease, color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--accent); color: var(--accent-fg); }
.btn-primary:hover { color: var(--accent-fg); filter: brightness(1.05); }
.btn-ghost { background: transparent; color: var(--fg); border-color: var(--border); }
.btn-ghost:hover { background: var(--bg-soft); color: var(--fg); }
.btn-lg { padding: 0.95rem 1.6rem; font-size: 1.05rem; }

/* Features grid */
.features {
  list-style: none;
  padding: 0;
  margin: 1.2rem 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.9rem;
}
.features li {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}
.features h3 { margin: 0 0 0.35rem; }
.features p { margin: 0; color: var(--fg-soft); font-size: 0.95rem; }

/* Banks strip */
.banks {
  list-style: none;
  padding: 0;
  margin: 0.6rem 0 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.banks li {
  padding: 0.45rem 0.9rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--fg);
}

/* Install accordion */
.install {
  margin-top: 1.5rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 1.1rem;
}
.install summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}
.install summary::-webkit-details-marker { display: none; }
.install[open] summary { margin-bottom: 0.6rem; }
.install ol { padding-left: 1.2rem; margin: 0.4rem 0 0.6rem; }
.install ol li { margin: 0.25rem 0; }

/* Footer */
footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  text-align: center;
  color: var(--fg-soft);
  font-size: 0.9rem;
}
footer p { margin: 0.3rem 0; }

/* Small screens */
@media (max-width: 520px) {
  .topnav a:nth-child(1),
  .topnav a:nth-child(2) { display: none; }
  section { padding: 2rem 0; }
  .hero { padding-top: 2.5rem; padding-bottom: 2rem; }
  .hero-icon { width: 96px; height: 96px; }
}