body {
    font-family: "Roboto", sans-serif;
    background: #eeeeee;
    margin: 0;
    padding: 20px;
}
header {
    text-align: center;
    margin-bottom: 40px;
}
header h1 {
    font-size: 2.5rem;
    margin: 10px 0;
    color: #222;
}
header p {
    color: #444;
}
section h2#easy{
    margin-bottom: 20px;
    color: #333;
    border-left: 6px solid #007BFF;
    padding-left: 10px;
}
section h2#medium{
    margin-bottom: 20px;
    color: #333;
    border-left: 6px solid #ff7300;
    padding-left: 10px;
}

section h2#hard{
    margin-bottom: 20px;
    color: #333;
    border-left: 6px solid #ff0000;
    padding-left: 10px;
}
.custom-divider {
  text-align: center;
  font-size: 24px;
  color: #999;
  margin: 40px 0;
  letter-spacing: 10px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr); 
    gap: 20px; 
}
.card {
    background: white;
    border-radius: 12px; 
    box-shadow: 0 4px 12px rgba(0,0,0,0.1); 
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    max-width: 100%;
    box-shadow: 0 0 20px rgba(52, 152, 219, 0.5);
}
.card:hover {
    transform: translateY(-5px) scale(1.01); 
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}
.card img {
    width: 100%;
    height: 200px; 
    object-fit: cover;
}
.card-content {
    padding: 15px; 
    flex: 1;
}
.card-content h3 {
    margin: 0 0 8px; 
    font-size: 1.1rem; 
    color: #222;
}
.card-content p {
    font-size: 0.9rem; 
    color: #555;
    margin-bottom: 10px; 
}
.badges {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.badge {
    background: #ff6b6b;
    color: white;
    font-size: 0.75rem;
    padding: 5px 10px;
    border-radius: 10px;
    font-weight: 500;
}
.badge:nth-child(2n) {
    background: #ffa94d;
}
.badge:nth-child(3n) {
    background: #4dabf7;
}
.badge:nth-child(4n) {
    background: #51cf66;
}
.card-footer {
    padding: 10px 15px; 
    border-top: 1px solid #eee;
    text-align: right;
}
.card-footer a {
    text-decoration: none;
    color: #007BFF;
    font-weight: bold;
    font-size: 0.9rem;
}