/* globals & reset */
* { margin:0; padding:0; box-sizing:border-box; }
body {
  transform: scale(0.95);
  transform-origin: top center;
  font-family: 'Georgia', serif;
  background: var(--bg,#f5efe6);
  color: var(--text,#1b1b1b);
  transition: background .4s, color .4s;
}
:root {
  --bg: #f5efe6; --text: #9a2f2f;
  --primary: #b2925e; --secondary: #e6d3b3;
  --accent: #927c47; --card-bg: #fffaf1;
  --shadow: rgba(0,0,0,0.1); --radius:12px;
}
body.dark {
  --bg: #141414; --text: #eaeaea;
  --primary: #d4af76; --secondary: #3a2e20;
  --accent: #c3a366; --card-bg: #1e1e1e;
  --shadow: rgba(255,255,255,0.05);
}
ul, li { list-style:none; }
/* scrollbar styling */
.recent-scroll::-webkit-scrollbar { height:8px; }
.recent-scroll::-webkit-scrollbar-thumb { background:#c78f8f; border-radius:4px; }



/* dashboard */
.top-dashboard {
  background:linear-gradient(135deg,var(--secondary),var(--card-bg));
  padding:2.5rem; border-radius:var(--radius);
  margin:1.5rem; box-shadow:0 6px 14px var(--shadow);
}
.welcome h1 { font-size:2rem; ; margin-bottom:0.5rem; color: #141414; }
.welcome p { font-size:1rem; color: #141414; }
/* filter controls */
.filter-controls {
  display:flex; gap:1rem; align-items:center;
  flex-wrap:wrap; margin-top:1.2rem;
}
.filter-controls input {
  flex:1; padding:.75rem 1rem; font-size:1rem;
  border:1px solid #ccc; border-radius:var(--radius);
}
.filter-controls button {
  padding:.75rem 1.2rem; border:none;
  border-radius:var(--radius); font-weight:bold;
  cursor:pointer;
}
.filter-controls .back-btn { background:#eee; color:#333; }
.filter-controls #clearLectures { background:rgb(56, 51, 45); color:#fff; }
.filter-controls #clearLectures:hover {  background:var(--accent); color:#fff; transform:scale(1.03);
}
/* recent section */
.recent-lectures { margin-top:2rem; }
.recent-lectures h2 {
  font-size:1.2rem; color: black; margin-bottom:.8rem;
}
.recent-scroll {
  display:flex; gap:1rem; overflow-x:auto; padding-bottom:.5rem;
}
.recent-scroll .lecture-card { min-width:200px; flex-shrink:0; }

/* grid */
.main-content { max-width:1200px; margin:auto; padding:1rem; }
.grid-container {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:1.5rem;
}

/* category block styling */
.category-block {
  background: var(--card-bg); padding:1.5rem;
  font-weight:bold; text-align:center; font-size:1.2rem;
  border-radius:var(--radius);
  border:2px solid var(--accent);
  box-shadow:0 4px 10px var(--shadow);
  cursor:pointer; transition:transform .2s, background .3s;
}
.category-block:hover {
  background:var(--accent); color:#fff; transform:scale(1.03);
}

/* lecture-card styling */
.lecture-card {
  background:var(--card-bg);
  border-radius:var(--radius);
  box-shadow:0 6px 18px var(--shadow);
  overflow:hidden; display:flex;
  flex-direction:column; transition:transform .2s;
}
.lecture-card:hover { transform:scale(1.02); }

.lecture-image-wrapper {
  width:100%; height:150px; overflow:hidden;
}
.lecture-image-wrapper img {
  width:100%; height:100%; object-fit:cover;
}

.lecture-card-content {
  padding:1rem; display:flex; flex-direction:column;
  gap:0.6rem;
}
.lecture-label {
  background:var(--accent); color:#fff;
  font-size:0.75rem; padding:.3rem .6rem;
  border-radius:8px; font-weight:bold;
  display:inline-block;
  text-transform:uppercase;
}
.lecture-card-content h3 {
  margin:0; font-size:1rem; color:var(--text);
}
.lecture-rating {
  display:flex; gap:0.5rem; align-items:center;
  font-size:0.85rem; color:gray;
}
.view-lecture-btn {
  margin-top:0.5rem; padding:.5rem 1rem;
  background:var(--primary); color:#fff;
  border:none; border-radius:var(--radius);
  font-weight:bold; cursor:pointer;
  align-self:flex-start; transition:background .2s;
}
.view-lecture-btn:hover { background:var(--accent); }

.lecture-card.completed {
  opacity:0.85; border:2px solid var(--accent);
}

.empty-message {
  grid-column:1/-1; text-align:center;
  font-size:1.2rem; color:#888; margin-top:2rem;
}

/* responsive tweaks */
@media(max-width:768px) {
  .navbar { flex-direction:column; gap:.5rem; }
  .filter-controls { flex-direction:column; gap:.75rem; }
  .lecture-image-wrapper { height:120px; }
}