/* css styles */
:root {
  --brand-primary: #1d4ed8;
  --brand-accent: #f97316;
  --text: #0f172a;
  --surface: #f8fafc;
  --surface-border: #e2e8f0;
  --font-size-base: 1rem;
  --line-height-base: 1.6;
  --line-height-heading: 1.2;
  --font-size-h1: 2.25rem;
  --font-size-h2: 1.875rem;
  --font-size-h3: 1.5rem;
  --font-size-h4: 1.25rem;
}

body {
  color: var(--text);
  background-color: var(--surface);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
}

a {
  color: var(--brand-primary);
  text-decoration-color: transparent;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
  transition: color 0.2s ease, text-decoration-color 0.2s ease,
    text-decoration-thickness 0.2s ease;
}

a:hover,
a:focus {
  color: var(--brand-accent);
  text-decoration-color: currentColor;
  text-decoration-thickness: 3px;
}

nav a,
.nav-link,
.navbar a {
  transition: color 0.2s ease, text-decoration-color 0.2s ease,
    text-decoration-thickness 0.2s ease;
}

nav a:hover,
nav a:focus,
.nav-link:hover,
.nav-link:focus,
.navbar a:hover,
.navbar a:focus {
  color: var(--brand-accent);
  text-decoration-color: currentColor;
  text-decoration-thickness: 3px;
}

button {
  transition: color 0.2s ease, background-color 0.2s ease,
    border-color 0.2s ease, box-shadow 0.2s ease;
}

button:hover,
button:focus {
  color: var(--brand-primary);
  border-color: var(--brand-primary);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--brand-primary);
  line-height: var(--line-height-heading);
  margin: 0 0 0.75rem;
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

h4 {
  font-size: var(--font-size-h4);
}

p {
  margin: 0 0 1rem;
}

.callout,
.callout-box,
.callout-note {
  border-left: 4px solid var(--brand-accent);
  background-color: var(--surface);
  color: var(--text);
  padding: 1rem 1.25rem;
  box-shadow: 0 0 0 1px var(--surface-border);
}