:root {
  --text: #2d3436;
  --text-main: #2d3436;
  --text-muted: #636e72;
  --accent: #0984e3;
  --bg: #ffffff;
  --code-bg: #f9f9f9;
  --border: #dfe6e9;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  max-width: 750px;
  margin: 0 auto;
  padding: 40px 20px;
}

h1 {
  font-size: 2.2rem;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.5rem;
  margin-top: 2.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

p {
  margin-bottom: 1.2rem;
}

.formula {
  background: var(--code-bg);
  border-left: 4px solid var(--accent);
  padding: 20px;
  margin: 2rem 0;
  font-family: "JetBrains Mono", monospace;
  font-size: 1.1rem;
}

.comparison {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
}

.comparison th,
.comparison td {
  text-align: left;
  padding: 12px;
  border: 1px solid var(--border);
}

.comparison th {
  background: var(--code-bg);
  font-size: 0.8rem;
  text-transform: uppercase;
}

.note {
  background: #fff9db;
  padding: 15px;
  border-radius: 8px;
  font-size: 0.95rem;
  border: 1px solid #f59e0b;
  margin: 2rem 0;
}

.footer-cta {
  margin-top: 4rem;
  padding: 30px;
  background: #f1f2f6;
  text-align: center;
  border-radius: 12px;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 12px 24px;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  margin-top: 15px;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.9;
}

@media (max-width: 600px) {
  h1 {
    font-size: 1.8rem;
  }
}

.breadcrumbs {
  margin-bottom: 2rem;
}

.breadcrumbs ol {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  color: var(--text-muted);
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--border);
  font-weight: bold;
}

.breadcrumbs a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

.breadcrumbs a:hover {
  text-decoration: underline;
  opacity: 0.8;
}

.breadcrumbs li[aria-current="page"] {
  color: var(--text-main);
  font-weight: 500;
}

.image-wrapper {
  margin: 2rem 0;
  text-align: center;
}