:root {
  --bg: #f4f6f8;
  --text: #333;
  --card-bg: white;
  --accent: #4a90e2;
  --shadow: rgba(0, 0, 0, 0.08);
}

body.dark {
  --bg: #1e1e2f;
  --text: #f0f0f0;
  --card-bg: #2b2b3d;
  --shadow: rgba(255, 255, 255, 0.05);
}

body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: background 0.3s, color 0.3s;
}

header {
  background: var(--accent);
  color: white;
  padding: 24px 20px;
  text-align: center;
}

.header-controls {
  margin-top: 15px;
}

#searchInput {
  padding: 8px 12px;
  border-radius: 6px;
  border: none;
  width: 200px;
  max-width: 90%;
}

#themeToggleBtn {
  margin-left: 12px;
  padding: 8px 14px;
  border: none;
  border-radius: 6px;
  background: white;
  color: var(--accent);
  cursor: pointer;
  font-weight: bold;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  padding: 30px;
  max-width: 1200px;
  margin: auto;
}

.app-card {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 4px 12px var(--shadow);
  padding: 20px;
  text-align: center;
  transition: transform 0.2s ease, background 0.3s;
}

.app-card:hover {
  transform: scale(1.03);
}

.app-card h3 {
  margin-top: 0;
  color: var(--accent);
}

.app-card p {
  font-size: 0.95em;
  opacity: 0.85;
}

.app-card a {
  display: inline-block;
  margin-top: 10px;
  padding: 8px 16px;
  background: var(--accent);
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
}

footer {
  text-align: center;
  padding: 20px;
  font-size: 0.9em;
  opacity: 0.6;
}

.usage-stats {
  margin-top: 10px;
  font-size: 0.85em;
  color: #777;
  line-height: 1.4;
}
body.dark .usage-stats {
  color: #aaa;
}

.logo {
  width: 200px;
  height: auto;
  margin-right: 15px;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding-top: 1rem;
  flex-wrap: wrap;
  text-align: center;
}

.slogan {
  font-size: 1rem;
  color: #888;
  margin-top: -0.5rem;
}