/* ── Reset & base ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue-900: #0D2B5E;
  --blue-800: #1565C0;
  --blue-600: #1E88E5;
  --blue-100: #E3F2FD;
  --green:    #2E7D32;
  --text:     #1A1A2E;
  --muted:    #5C677D;
  --bg:       #FFFFFF;
  --surface:  #F5F8FF;
  --border:   #DCE4F0;
  --radius:   12px;
  --max-w:    1100px;
}

html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; color: var(--text); background: var(--bg); line-height: 1.6; }

a { color: var(--blue-800); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ── Header ─────────────────────────────────────────────────────────────── */
header { position: sticky; top: 0; background: var(--blue-900); color: #fff; z-index: 100; }
header .container { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.1rem; }
.logo-icon { font-size: 1.4rem; }
header nav a { color: rgba(255,255,255,0.85); font-size: 0.95rem; transition: color 0.15s; }
header nav a:hover { color: #fff; text-decoration: none; }

/* ── Hero ───────────────────────────────────────────────────────────────── */
.hero { background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-800) 60%, var(--blue-600) 100%); color: #fff; padding: 80px 0; }
.hero-inner { display: flex; align-items: center; gap: 60px; }
.hero-text { flex: 1; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.15; margin-bottom: 20px; }
.subtitle { font-size: 1.1rem; color: rgba(255,255,255,0.85); max-width: 520px; margin-bottom: 32px; }
.cta-group { display: flex; flex-wrap: wrap; gap: 14px; }
.btn-primary { background: #fff; color: var(--blue-900); font-weight: 700; padding: 14px 28px; border-radius: var(--radius); font-size: 1rem; transition: transform 0.15s, box-shadow 0.15s; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.25); text-decoration: none; }
.btn-secondary { border: 2px solid rgba(255,255,255,0.5); color: #fff; padding: 12px 26px; border-radius: var(--radius); font-size: 1rem; transition: border-color 0.15s; }
.btn-secondary:hover { border-color: #fff; text-decoration: none; }

.hero-badge { flex-shrink: 0; background: rgba(255,255,255,0.12); border-radius: 16px; padding: 28px 36px; backdrop-filter: blur(10px); text-align: center; }
.badge-inner { display: flex; align-items: flex-end; gap: 8px; height: 80px; margin-bottom: 14px; justify-content: center; }
.signal-bar { width: 18px; background: rgba(255,255,255,0.5); border-radius: 4px 4px 0 0; transition: height 1s ease; }
.signal-bar.target { background: #69F0AE; }
.badge-label { font-weight: 700; font-size: 0.85rem; letter-spacing: 0.1em; color: #69F0AE; }

/* ── Features ───────────────────────────────────────────────────────────── */
.features { padding: 80px 0; background: var(--surface); }
h2 { font-size: 2rem; text-align: center; margin-bottom: 48px; color: var(--blue-900); }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.feature-card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.feature-icon { font-size: 2rem; margin-bottom: 14px; }
.feature-card h3 { font-size: 1.1rem; margin-bottom: 10px; color: var(--blue-900); }
.feature-card p { color: var(--muted); font-size: 0.95rem; }

/* ── Platforms ──────────────────────────────────────────────────────────── */
.platforms { padding: 80px 0; }
.platform-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.platform-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.ios-card { border-color: var(--blue-600); background: var(--blue-100); }
.platform-icon { font-size: 2rem; margin-bottom: 12px; }
.platform-card h3 { margin-bottom: 8px; color: var(--blue-900); }
.platform-card p { font-size: 0.9rem; color: var(--muted); }
.platform-card strong { color: var(--text); }

/* ── Footer ─────────────────────────────────────────────────────────────── */
footer { background: var(--blue-900); color: rgba(255,255,255,0.75); padding: 40px 0; text-align: center; }
footer a { color: rgba(255,255,255,0.9); }
footer p + p { margin-top: 8px; }
.footer-note { font-size: 0.8rem; }

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 700px) {
  .hero-inner { flex-direction: column; text-align: center; }
  .cta-group { justify-content: center; }
  .hero-badge { width: 100%; }
}