:root {
  --bg: #0f172a;
  --fg: #f1f5f9;
  --muted: #94a3b8;
  --primary: #38bdf8;
  --card-bg: #1e293b;
  --border: #334155;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  padding: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  text-align: center;
  margin-bottom: 3rem;
  padding-top: 2rem;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 1.5rem;
}

.search {
  max-width: 500px;
  margin: 1rem auto;
}

.search input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--fg);
  font-size: 1rem;
}

.search input:focus {
  outline: 2px solid var(--primary);
}

.categories {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin: 2rem 0;
}

.category-btn {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s;
}

.category-btn.active, .category-btn:hover {
  background: var(--primary);
  color: var(--bg);
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.app-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  transition: transform 0.2s;
}

.app-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
}

.app-card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.app-card p {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tag {
  background: rgba(56, 189, 248, 0.1);
  color: var(--primary);
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

.visit-btn {
  display: inline-block;
  background: transparent;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid var(--primary);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  transition: all 0.2s;
}

.visit-btn:hover {
  background: var(--primary);
  color: var(--bg);
}

footer {
  text-align: center;
  padding: 3rem 0 2rem;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
}

footer a {
  color: var(--primary);
  text-decoration: none;
}

@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }
  h1 {
    font-size: 2rem;
  }
}