:root { /* global color variables */
  --bg: #f0f0f0;
  --btn-bg: #ffffff;
  --btn-border: #ccc;
  --btn-active: #000;
  --btn-text: #000;
}
body { 
  margin: 0;
  font-family: Arial;
  background: var(--bg);
}
header { /* top header section */
  text-align: center;
  padding: 30px;
}
.container { /* main two-column layout */
  display: flex;
  gap: 20px;
  max-width: 1300px;
  margin: auto;
  align-items: flex-start;
}
/* LEFT COLUMN */
.left-column { /* main content area */
  flex: 2;
}
/* RIGHT COLUMN */
.right-column { /* movie details panel */
  flex: 1;
  position: sticky;
  top: 20px;
  align-self: flex-start;
}
.movie-details { /* details box styling */
  background: white;
  padding: 15px;
  border: 1px solid #ddd;
}
.search-section { /* search bar layout */
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 15px;
}
button { /* all buttons */
  padding: 8px 12px;
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  cursor: pointer;
  transition: 0.2s;
  font-size: 14px;
}
button:hover { /* hover effect */
  background: #eaeaea;
}
button.active { /* active button state */
  background: var(--btn-active);
  color: white;
  border-color: black;
}
#searchInput { /* search input box */
  padding: 8px;
}
.search-results,
.categories { /* result + category sections */
  background: white;
  padding: 15px;
  margin-top: 20px;
  border: 1px solid #ddd;
}
#resultsGrid,
.category-grid { /* grid layout for movies */
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}
.movie-card { /* individual movie card */
  background: white;
  padding: 10px;
  border: 1px solid #ddd;
  cursor: pointer;
  text-align: center;
}
.movie-card img { /* movie poster image */
  width: 100%;
}
.view-toggle { /* grid/list buttons - always visible */
  display: flex;
  gap: 5px;
  margin-bottom: 10px;
}
#controls { /* pagination container */
  margin-top: 10px;
  margin-bottom: 10px;
}
.pagination { /* page buttons */
  display: flex;
  gap: 5px;
}
.list-view { /* switch layout mode */
  display: block !important;
}
.list-view .movie-card { /* list layout card */
  display: flex;
  gap: 10px;
  align-items: center;
  text-align: left;
}
.list-view .movie-card img { /* smaller image in list mode */
  width: 80px;
}
@media (max-width: 900px) { /* tablet layout */
  .container {
    flex-direction: column;
  }
  .right-column {
    position: static;
  }
  #resultsGrid,
  .category-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 600px) { /* mobile layout */
  #resultsGrid,
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 400px) { /* small mobile */
  #resultsGrid,
  .category-grid {
    grid-template-columns: 1fr;
  }
}