:root {
  --accent: #5b6dc9;
  --accent-dark: #3d4c7a;
  --bg: #ffffff;
  --surface: #f5f6fb;
  --text: #1c1c22;
  --muted: #5c5f70;
  --border: #e4e6f0;
  --radius: 14px;
  --maxw: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a;
    --surface: #1f1f27;
    --text: #ececf1;
    --muted: #a0a2b0;
    --border: #2c2c37;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header / nav */
.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  z-index: 10;
}
.nav {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 62px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
}
.brand img { width: 30px; height: 30px; border-radius: 7px; }
.nav a.link {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
}
.nav a.link:hover { color: var(--accent); }

/* Hero */
.hero {
  text-align: center;
  padding: 72px 0 48px;
}
.hero img.appicon {
  width: 108px;
  height: 108px;
  border-radius: 24px;
  box-shadow: 0 10px 30px rgba(91, 109, 201, 0.25);
}
.hero h1 {
  font-size: 2.6rem;
  margin: 24px 0 8px;
  letter-spacing: -0.02em;
}
.hero .tagline {
  font-size: 1.25rem;
  color: var(--muted);
  margin: 0 auto;
  max-width: 30ch;
}
.badges { margin-top: 28px; }
.badge {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

/* Sections */
section { padding: 20px 0; }
h2 {
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  margin: 32px 0 12px;
}
h3 { font-size: 1.1rem; margin: 28px 0 6px; }
p { color: var(--text); }
a { color: var(--accent); }

.features {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: grid;
  gap: 12px;
}
.features li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.features li b { display: block; margin-bottom: 2px; }

.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin: 20px 0;
}

.faq { margin-top: 8px; }
.faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 18px;
  margin-bottom: 10px;
  background: var(--surface);
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  padding: 12px 0;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "＋"; color: var(--accent); margin-right: 10px; }
.faq details[open] summary::before { content: "－"; }
.faq details > p { margin: 0 0 14px; color: var(--muted); }

.contact-btn {
  display: inline-block;
  margin-top: 8px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 12px;
}
.contact-btn:hover { background: var(--accent-dark); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 56px;
  padding: 28px 0;
  color: var(--muted);
  font-size: 14px;
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
}
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.site-footer .sep { margin-left: auto; }

.muted { color: var(--muted); }
.small { font-size: 0.9rem; }