:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #555555;
  --color-accent: #ff6b35;
  --color-border: #e5e5e5;
  --color-bg-meta: #f9f9f9;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 720px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  padding: 2rem 1.25rem 4rem;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Header / Meta */
header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--color-border);
}

header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
}

.meta {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  background: var(--color-bg-meta);
  border-radius: 8px;
  padding: 0.75rem 1rem;
}

.meta p {
  margin: 0.15rem 0;
}

.meta strong {
  color: var(--color-text);
}

/* Intro */
.intro {
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.intro p {
  margin-bottom: 0.75rem;
}

/* Sections */
section {
  margin-bottom: 2rem;
}

h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  padding-top: 0.5rem;
  color: var(--color-text);
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

p {
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

ul, ol {
  margin: 0.5rem 0 0.75rem 1.5rem;
  font-size: 0.95rem;
}

li {
  margin-bottom: 0.35rem;
}

/* Links */
a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Contact block */
.contact {
  background: var(--color-bg-meta);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-top: 1rem;
}

.contact p {
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
}

/* Footer */
footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  text-align: center;
}

footer nav {
  margin-bottom: 0.75rem;
}

footer nav a {
  color: var(--color-text-secondary);
  margin: 0 0.5rem;
}

footer nav a:hover {
  color: var(--color-accent);
}

/* Responsive */
@media (max-width: 480px) {
  body {
    padding: 1.25rem 1rem 3rem;
  }

  header h1 {
    font-size: 1.3rem;
  }

  h2 {
    font-size: 1.1rem;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1a1a1a;
    --color-text: #e5e5e5;
    --color-text-secondary: #999999;
    --color-border: #333333;
    --color-bg-meta: #242424;
  }
}