/* CreaditVideo Minimalist Professional CSS */
:root {
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-subtle: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --border-color: #e2e8f0;
  --header-border: #cbd5e1;
  --radius: 8px;
  --max-width: 800px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  text-decoration: none;
  letter-spacing: -0.02em;
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  margin-left: 1.25rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

nav a:hover, nav a.active {
  color: var(--primary);
}

main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 2.5rem auto;
  padding: 0 1.5rem;
}

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

h1 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1rem;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.35rem;
}

p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

ul, ol {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

strong {
  color: var(--text-main);
}

.meta-note {
  font-size: 0.875rem;
  color: var(--text-subtle);
  margin-bottom: 1.5rem;
}

.lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.callout {
  background-color: #f1f5f9;
  border-left: 4px solid var(--primary);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.callout p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--primary);
  text-decoration: underline;
}

a:hover {
  color: var(--primary-hover);
}

footer {
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  padding: 2rem 1.5rem;
  margin-top: auto;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-subtle);
  align-items: center;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--primary);
  text-decoration: underline;
}

@media (max-width: 640px) {
  .card {
    padding: 1.5rem;
  }
  
  .nav-container {
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
  }
  
  nav a {
    margin-left: 0;
    margin-right: 1rem;
  }
}