:root {
  color-scheme: light;
  --text-primary: #1a334f;
  --surface: #ffffff;
  --page-bg: #f4f6fa;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--page-bg);
  color: var(--text-primary);
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1rem;
}

.site-header {
  background: var(--text-primary);
  color: #ffffff;
  padding: 2rem 0 1.5rem;
}

h1 {
  margin: 0;
  font-size: 2rem;
}

.subtitle {
  margin: 0.5rem 0 1rem;
}

nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

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

nav a[aria-current="page"] {
  text-decoration: underline;
}

main {
  padding: 2rem 0;
}

.card {
  background: var(--surface);
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

h2 {
  margin-top: 0;
  color: var(--text-primary);
}

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

.site-footer {
  border-top: 1px solid #d1d5db;
  padding: 1rem 0;
  background: var(--surface);
}

.footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

ul {
  padding-left: 1.2rem;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.9rem;
}

.screenshot-grid img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid #d1d5db;
  background: var(--surface);
}