*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #0A0E1A;
  --surface:  #111827;
  --border:   #2A3550;
  --text:     #F0F4FF;
  --muted:    #8A9BC4;
  --dim:      #566580;
  --accent:   #4A8FE7;
  --vfr:      #22C55E;
  --mvfr:     #F59E0B;
  --ifr:      #EF4444;
  --lifr:     #8B5CF6;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Nav ── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  border-bottom: 1px solid var(--border);
  background: rgba(10,14,26,.92);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
}
.nav-brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav-links { display: flex; gap: 24px; }
.nav-links a { color: var(--muted); font-size: 14px; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ── Sections ── */
section { padding: 72px 24px; max-width: 900px; margin: 0 auto; }
section + section { border-top: 1px solid var(--border); }

/* ── Hero ── */
.hero {
  text-align: center;
  padding-top: 80px;
  padding-bottom: 80px;
}
.hero img.app-icon {
  width: 120px;
  height: 120px;
  border-radius: 26px;
  margin-bottom: 24px;
  box-shadow: 0 8px 40px rgba(74,143,231,.25);
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 12px;
}
.hero .tagline {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto 32px;
}
.badge-row {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.badge-pill {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .5px;
}
.pill-vfr   { color: var(--vfr);  border-color: var(--vfr); }
.pill-mvfr  { color: var(--mvfr); border-color: var(--mvfr); }
.pill-ifr   { color: var(--ifr);  border-color: var(--ifr); }
.pill-lifr  { color: var(--lifr); border-color: var(--lifr); }

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  padding: 14px 28px;
  border-radius: 14px;
  margin-top: 32px;
  transition: opacity .15s;
}
.cta-btn:hover { opacity: .88; text-decoration: none; }

/* ── Hero image ── */
.hero-image {
  max-width: 100%;
  border-radius: 16px;
  border: 1px solid var(--border);
  margin: 48px auto 0;
  display: block;
  box-shadow: 0 16px 64px rgba(0,0,0,.5);
}

/* ── Features ── */
.section-title {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 32px;
  letter-spacing: -.5px;
}
.section-title span { color: var(--accent); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
}
.feature-icon {
  font-size: 28px;
  margin-bottom: 12px;
}
.feature-card h3 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.feature-card p  { font-size: 13px; color: var(--muted); line-height: 1.55; }

/* ── Data source ── */
.data-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 32px;
  display: flex;
  align-items: flex-start;
  gap: 20px;
}
.data-icon { font-size: 36px; flex-shrink: 0; }
.data-box h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.data-box p  { font-size: 14px; color: var(--muted); line-height: 1.6; }

/* ── Support FAQ ── */
.faq-list { display: flex; flex-direction: column; gap: 16px; }
details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}
summary {
  padding: 18px 22px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
summary::after { content: "+"; font-size: 20px; color: var(--muted); }
details[open] summary::after { content: "−"; }
.faq-answer {
  padding: 0 22px 18px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}
.faq-answer p + p { margin-top: 10px; }

/* ── Contact ── */
.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
}
.contact-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.contact-card p  { color: var(--muted); margin-bottom: 20px; font-size: 14px; }
.contact-btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  padding: 12px 26px;
  border-radius: 12px;
}
.contact-btn:hover { opacity: .85; text-decoration: none; }

/* ── Privacy note ── */
.privacy-note {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 28px;
}
.privacy-note h3 { font-weight: 700; margin-bottom: 10px; }
.privacy-note p  { color: var(--muted); font-size: 14px; line-height: 1.7; }

/* ── Footer ── */
footer {
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid var(--border);
  color: var(--dim);
  font-size: 12px;
}
footer a { color: var(--dim); }

@media (max-width: 600px) {
  nav { padding: 12px 16px; }
  section { padding: 48px 16px; }
  .data-box { flex-direction: column; }
}