body {
  margin: 0;
  font-family: 'Vazirmatn', 'Noto Sans Arabic', sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: background 0.3s, color 0.3s;
}
:root {
  --bg: #f9f9f9;
  --text: #222;
  --card-bg: #fff;
  --card-shadow: rgba(0,0,0,0.1);
}
body.dark {
  --bg: #181818;
  --text: #eee;
  --card-bg: #242424;
  --card-shadow: rgba(0,0,0,0.6);
}
header {
  position: sticky;
  top: 0;
  background: var(--bg);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: 0 2px 5px var(--card-shadow);
  z-index: 100;
}
header h1 {
  margin: 0;
  font-size: 1.5rem;
  text-align: center;
}
.controls {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
}
#search {
  flex: 1;
  padding: 0.5rem;
  border-radius: 8px;
  border: 1px solid #ccc;
}
#lang-switcher, #theme-toggle {
  padding: 0.5rem;
  border-radius: 8px;
  border: 1px solid #ccc;
  background: var(--card-bg);
  color: var(--text);
}
.categories {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.5rem 0;
}
.categories button {
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  background: var(--card-bg);
  box-shadow: 0 2px 5px var(--card-shadow);
  cursor: pointer;
  transition: transform 0.2s, background 0.3s;
}
.categories button.active {
  background: #0077ff;
  color: white;
}
.categories button:hover {
  transform: scale(1.05);
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  padding: 1rem;
}
.card {
  background: var(--card-bg);
  padding: 1rem;
  border-radius: 16px;
  box-shadow: 0 4px 10px var(--card-shadow);
  text-align: center;
  transition: transform 0.2s, box-shadow 0.3s;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 15px var(--card-shadow);
}
.card i {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}
.card a {
  color: var(--text);
  text-decoration: none;
  font-weight: bold;
}