/* Clean responsive styles for main navigation cards and features */

:root {
  --card-radius: 12px;
  --card-bg: linear-gradient(180deg, rgba(22,26,32,0.7), rgba(18,20,24,0.45));
  --muted: rgba(255,255,255,0.72);
}

.main-nav-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
  align-items: stretch;
}

.main-nav-grid .card {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  border: 1px solid rgba(255,255,255,0.04);
  padding: 0;
  box-shadow: 0 10px 40px rgba(0,0,0,0.45);
  overflow: hidden;
  display: flex;
  align-items: stretch;
}

.main-nav-grid .card-body {
  padding: 36px 20px 72px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.main-nav-grid .card-icon i { font-size: 44px; margin-bottom: 18px; color: var(--neon-1); }
.main-nav-grid h3 { font-size: 20px; margin: 6px 0 8px; font-weight:800; }
.main-nav-grid p { color: var(--muted); margin: 0 0 18px; line-height:1.6; }

.main-nav-grid .btn {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  width: 88%;
  max-width: 360px;
  padding: 12px 18px;
  border-radius: 999px;
  text-decoration: none;
  background: linear-gradient(90deg, #00d4ff, #00a3ff);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 8px 30px rgba(0,212,255,0.12);
  border: 1px solid rgba(255,255,255,0.06);
}

.main-nav-grid .btn:hover { transform: translateY(-3px); box-shadow: 0 18px 48px rgba(0,212,255,0.16); }

/* Responsive: tablet -> 2 columns */
@media (max-width: 1100px) {
  .main-nav-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Mobile: single column and full-width buttons */
@media (max-width: 600px) {
  .main-nav-grid { grid-template-columns: 1fr; gap: 16px; }
  .main-nav-grid .card-body { padding: 20px 14px 48px; }
  .main-nav-grid .card-icon i { font-size: 36px; }
  .main-nav-grid .btn { width: 100%; max-width: none; }
}

/* Features row fallback styles */
.features-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; margin-top: 40px; }
.feature-card {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  padding: 18px 12px !important;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.feature-card .fa-solid { font-size: 40px; margin-bottom: 14px; }
.feature-card h4 { margin: 0 0 12px; font-size: 20px; font-weight: 700; color: #f6fbff; }
.feature-card p { margin: 0; color: rgba(255,255,255,0.7); }