:root {
  --color-primary: #4B3F72;
  --color-primary-light: #6C5B9A;
  --color-bg-soft: #EDEBFA;
  --color-bg: #FFFFFF;
  --color-text: #1A1A1A;
  --color-border: #D5D1EC;
  --max-width: 880px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg-soft);
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.2rem;
}

/* Header */

.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  height: 40px;
  width: auto;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--color-primary);
}

.brand-tagline {
  font-size: 0.85rem;
  color: #555;
}

.top-nav a {
  margin-left: 1rem;
  font-size: 0.95rem;
}

/* Breadcrumbs */

.breadcrumbs {
  font-size: 0.85rem;
  margin: 1rem 0 0.5rem;
}

.breadcrumbs a {
  color: var(--color-primary);
}

/* Main */

.site-main {
  padding: 1.5rem 0 2.5rem;
}

.hero h1 {
  font-size: 1.7rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

.hero p {
  margin-top: 0;
}

.home-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.home-card {
  background-color: var(--color-bg);
  border-radius: 6px;
  border: 1px solid var(--color-border);
  padding: 1rem;
}

.home-card h2 {
  font-size: 1.1rem;
  margin-top: 0;
  margin-bottom: 0.4rem;
}

.home-section {
  background-color: var(--color-bg);
  border-radius: 6px;
  border: 1px solid var(--color-border);
  padding: 1rem;
  margin-bottom: 1rem;
}

/* Footer */

.site-footer {
  background-color: var(--color-primary);
  color: #f5f3ff;
  padding: 1.5rem 0 1rem;
  margin-top: 1rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.footer-nav.secondary {
  font-size: 0.9rem;
}

.site-footer a {
  color: #f5f3ff;
}

.footer-meta {
  font-size: 0.85rem;
  margin: 0.5rem 0 0;
}

/* Articles layout (for later pages) */

.article-header h1 {
  font-size: 1.6rem;
  margin-bottom: 0.3rem;
  color: var(--color-primary);
}

.article-meta {
  font-size: 0.85rem;
  color: #666;
  margin-bottom: 1rem;
}

.article-body h2 {
  font-size: 1.2rem;
  margin-top: 1.4rem;
}

.article-body h3 {
  font-size: 1.05rem;
  margin-top: 1.1rem;
}

.article-body p {
  margin: 0.4rem 0;
}

/* Related articles */

.related-articles {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.related-articles h2 {
  font-size: 1.1rem;
  margin-top: 0;
}

.related-articles ul {
  list-style: none;
  padding-left: 0;
  margin: 0.4rem 0 0;
}

.related-articles li {
  margin-bottom: 0.25rem;
}

/* FAQ list */

.faq-list h2 {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

/* SVG diagrams */

.diagram {
  margin: 1.2rem 0;
}

.diagram svg {
  width: 100%;
  height: auto;
  display: block;
}

/* Responsive */

@media (min-width: 700px) {
  .home-grid {
    grid-template-columns: 1fr 1fr;
  }

  .header-inner {
    align-items: center;
  }
}

@media (min-width: 960px) {
  .home-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}