:root {
  --primary: #5623a7;
  --accent: #ffdc5c;
  --light: #f7f7f9;
  --dark: #222;
  --max-width: 900px;
  font-size: 16px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background: var(--light);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background: var(--primary);
  color: #fff;
  padding: 1.25rem 1rem;
}

header h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

nav a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}

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

main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 2rem auto;
  padding: 0 1rem;
}

.welcome {
  margin-bottom: 2rem;
}

.welcome p {
  margin-bottom: 1rem;
  font-size: 1.125rem;
}

.highlight {
  background: var(--accent);
  color: #000;
  padding: 0.75rem 1rem;
  border-radius: 4px;
  font-weight: 700;
}

.articles h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

.articles ul {
  list-style: none;
  display: grid;
  gap: 1.5rem;
}

.articles li {
  background: #fff;
  border: 1px solid #e1e1e5;
  border-radius: 6px;
  padding: 1rem;
  transition: border-color 0.2s;
}

.articles li:hover {
  border-color: var(--primary);
}

.articles a {
  color: var(--primary);
  text-decoration: none;
  font-size: 1.125rem;
  font-weight: 600;
}

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

footer {
  background: #f0eff5;
  padding: 1rem;
  text-align: center;
  font-size: 0.875rem;
}