/* Reset and base */
*,
*::before,
*::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: #111;
  background: #fff;
  line-height: 1.5;
}
a { color: #0c69ff; text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

/* Layout */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 1rem; }
header {
  position: sticky; top: 0; z-index: 1000;
  background: #111; color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.1);
}
.brand {
  display: flex; align-items: center; gap: .75rem;
  padding: .75rem 1rem;
}
.brand-logo {
  width: 32px; height: 32px; border-radius: 6px; background: #0c69ff;
  display: inline-block;
}
.brand-title { font-weight: 700; font-size: 1.125rem; }
.nav {
  display: flex; align-items: center; gap: 1rem;
  padding: .5rem 1rem 1rem;
  flex-wrap: wrap;
}
.nav a { color: #fff; opacity: .9; }
.nav a:hover { opacity: 1; }

/* Hero */
.hero { padding: 2rem 1rem; }
.hero h1 {
  margin: 0 0 .5rem;
  font-size: clamp(1.5rem, 1.5rem + 1.5vw, 2.5rem);
}
.hero p { margin: 0; color: #444; }

/* Grid of cards */
.grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1rem;
}
@media (min-width: 640px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1200px) { .grid { grid-template-columns: repeat(4, 1fr); } }

.card {
  border: 1px solid #eee;
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,.04);
  transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,.1);
}
.card-media { aspect-ratio: 16 / 9; background: #f6f6f6; }
.card-body { padding: .75rem; }
.card-title {
  margin: 0 0 .25rem;
  font-weight: 600;
  font-size: 1rem;
}
.card-meta { font-size: .85rem; color: #666; }
.tags { margin-top: .5rem; display: flex; flex-wrap: wrap; gap: .5rem; }
.tag {
  font-size: .75rem;
  color: #0c69ff;
  background: #eef4ff;
  padding: .25rem .5rem;
  border-radius: 999px;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .5rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: .625rem .9rem;
  background: #fff;
  color: #111;
  cursor: pointer;
  transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}
.btn:hover { box-shadow: 0 4px 12px rgba(0,0,0,.08); border-color: #ccc; }
.btn-primary {
  border-color: #0c69ff;
  background: #0c69ff;
  color: #fff;
}
.btn-primary:hover { box-shadow: 0 4px 14px rgba(12,105,255,.35); }
.btn-block { width: 100%; }

/* Footer */
footer {
  margin-top: 2rem; padding: 2rem 1rem;
  border-top: 1px solid #eee;
  color: #555;
}
.footer-columns {
  display: grid; grid-template-columns: repeat(1, 1fr); gap: 1rem;
}
@media (min-width: 768px) { .footer-columns { grid-template-columns: repeat(3, 1fr); } }
.footer-col h3 { margin: 0 0 .5rem; font-size: 1rem; }
.footer-col p { margin: 0; font-size: .95rem; }

/* Content */
.content { max-width: 75ch; }
.prose h2 { margin: 1.5rem 0 .75rem; font-size: 1.25rem; }
.prose p { margin: .75rem 0; color: #333; }
.meta { font-size: .9rem; color: #666; }

/* Utility */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}