:root {
  --bx-royal: #3b5bdb;
  --bx-mint: #10b981;
  --bx-sun: #f59e0b;
  --bx-pink: #ec4899;
  --bx-ink: #0b1020;
  --bx-ice: #f8fafc;
  --bx-muted: #6b7280;

  --radius: 1rem;
  --shadow: 0 1rem 2rem rgba(0, 0, 0, 0.08);
  --focus: 0 0 0 0.25rem rgba(16, 185, 129, 0.35);
}

html,
body {
  font-family: "Inter", "Rubik", system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
  color: var(--bx-ink);
  background: #fff;
}

.navbar-brand .brand-dot {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50%;
  display: inline-block;
  background: conic-gradient(
    from 45deg,
    var(--bx-royal),
    var(--bx-mint),
    var(--bx-sun),
    var(--bx-pink)
  );
  box-shadow: 0 0 0.75rem rgba(59, 91, 219, 0.45);
}
.nav-link.active {
  font-weight: 700;
  color: var(--bx-royal) !important;
}

.hero {
  color: #fff;
  background: radial-gradient(
      900px 500px at 10% 15%,
      rgba(16, 185, 129, 0.3),
      transparent 60%
    ),
    radial-gradient(
      700px 400px at 90% 10%,
      rgba(236, 72, 153, 0.25),
      transparent 60%
    ),
    linear-gradient(135deg, #2d3eb7, #0fb78e);
}

.card {
  border-radius: var(--radius);
}
.step-badge {
  min-width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  background: linear-gradient(135deg, var(--bx-royal), var(--bx-mint));
  color: #fff;
  font-weight: 700;
  box-shadow: var(--shadow);
}
.btn:focus,
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
  box-shadow: var(--focus);
}

.grad-a {
  background: linear-gradient(135deg, var(--bx-royal), #60a5fa);
  color: #fff;
}
.grad-b {
  background: linear-gradient(135deg, var(--bx-mint), #34d399);
  color: #0b1220;
}
.grad-c {
  background: linear-gradient(135deg, var(--bx-sun), #fbbf24);
  color: #0b1220;
}
.grad-d {
  background: linear-gradient(135deg, var(--bx-pink), #a78bfa);
  color: #fff;
}

.toc-link {
  text-decoration: none;
}
.toc-link:hover {
  text-decoration: underline;
}

.visually-hidden-focusable:not(:focus):not(:focus-within) {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  border: 0;
  padding: 0;
  white-space: nowrap;
  clip-path: inset(50%);
  clip: rect(0 0 0 0);
  overflow: hidden;
}

.price-card .display-6 {
  letter-spacing: -0.5px;
}

.callout {
  background: linear-gradient(135deg, #3b5bdb, #10b981);
  color: #fff;
}