html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html, body {
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main.flex-grow-1 {
  flex: 1 0 auto;
}

footer.mt-auto {
  flex-shrink: 0;
}

/* ── Navbar ──────────────────────────────────────────── */

.navbar {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  padding: 0.6rem 0;
}

.navbar .navbar-brand {
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: #fff;
}

.navbar .navbar-brand img {
  filter: brightness(0) invert(1);
}

.navbar .nav-link {
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.5rem 0.85rem;
  border-radius: 6px;
  transition: color 0.2s, background-color 0.2s;
}

.navbar .nav-link:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.1);
}

.navbar .nav-link.active {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.15);
}

.navbar .dropdown-toggle::after {
  margin-left: 0.35em;
  vertical-align: 0.15em;
}

.navbar .dropdown-menu {
  border: none;
  border-radius: 8px;
  padding: 0.4rem;
  margin-top: 0.35rem;
}

.navbar .dropdown-item {
  font-size: 0.9rem;
  border-radius: 6px;
  padding: 0.45rem 0.75rem;
}

.navbar .dropdown-item:hover {
  background-color: #f0f0f0;
}

.navbar .btn-light {
  color: #1a1a2e;
  border: none;
  border-radius: 6px;
  transition: transform 0.15s, box-shadow 0.15s;
}

.navbar .btn-light:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}