* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif, serif;
}

body {
    background-color: #f0f0f0;
}

h1, h2, h3, .prettyfont{
    font-family: "Ribeye Marrow", serif;
    font-weight: 400;
    font-style: normal;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #333;
    display: flex;
    align-items: center;
}

.logo-circle {
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, #e6f7ff 0%, #b3e0ff 100%);
    border-radius: 50%;
    margin-right: 10px;
}

nav ul {
    display: flex;
    list-style: none;
}

nav li {
    margin-left: 2rem;
}

nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
}

.search-container {
    display: flex;
    align-items: center;
}

.search-input {
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-right: 0.5rem;
}

.search-button {
    background: none;
    border: none;
    cursor: pointer;
}

.hero, footer {
    background: linear-gradient(45deg, #3c78d8, #2ecc71, #a857ff, #2ae2ca);
    background-size: 300% 300%;
    animation: gradient-animation 15s ease infinite;
    padding: 80px 0;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    padding: 3rem 2rem;
    color: white;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><polygon points="0,0 50,25 100,0" fill="rgba(255,255,255,0.1)"/><polygon points="0,25 50,50 100,25" fill="rgba(255,255,255,0.15)"/><polygon points="0,50 50,75 100,50" fill="rgba(255,255,255,0.1)"/><polygon points="0,75 50,100 100,75" fill="rgba(255,255,255,0.15)"/></svg>');
    background-size: 100px 100px;
    opacity: 0.4;
    z-index: 0;
}

.hero-content {
    z-index: 1;
    width: 50%;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}


/* Quiz cards section */
.quizzes-section {
    padding: 2rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 1.5rem;
}

.quiz-card {
    background: linear-gradient(135deg, #3c78d8 0%, #2ecc71 100%);
    border-radius: 8px;
    overflow: hidden;
    width: calc(50% - 0.75rem);
    padding: 1.5rem;
    color: white;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    position: relative;
}

.quiz-card::before, footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><polygon points="0,0 50,25 100,0" fill="rgba(255,255,255,0.1)"/><polygon points="0,25 50,50 100,25" fill="rgba(255,255,255,0.15)"/><polygon points="0,50 50,75 100,50" fill="rgba(255,255,255,0.1)"/><polygon points="0,75 50,100 100,75" fill="rgba(255,255,255,0.15)"/></svg>');
    background-size: 100px 100px;
    opacity: 0.4;
    z-index: 0;
}

.quiz-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.quiz-card-img {
    width: 80px;
    height: 80px;
    background-color: rgba(255,255,255,0.2);
    border-radius: 5px;
    margin-right: 1rem;
    z-index: 1;
}

.quiz-card-content {
    flex: 1;
    z-index: 1;
}

.quiz-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.quiz-card p {
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
}

.difficulty-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background-color: rgba(255,255,255,0.2);
    border-radius: 4px;
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
}

.author {
    font-size: 0.8rem;
    margin-top: 0.5rem;
    text-align: right;
}

.autisme {
    background: linear-gradient(135deg, #7b4397 0%, #35aee8 100%);
}

.depressie {
    background: linear-gradient(135deg, #5d38a7 0%, #3581e8 100%);
}

.dyscalculie {
    background: linear-gradient(135deg, #654ea3 0%, #38a7a2 100%);
}

.hoogbegaafdheid {
    background: linear-gradient(135deg, #3a47d5 0%, #00d2ff 100%);
}

@keyframes gradient-animation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }

footer p {
    position: relative;
    margin-top: 3rem;
    z-index: 1;
}

@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content, .hero-image {
        width: 100%;
        margin-bottom: 1.5rem;
    }
    
    .quizzes-section {
        flex-direction: column;
    }
    
    .quiz-card {
        width: 100%;
    }
    
    nav ul {
        display: none;
    }
}


.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 300px;  
    height: 250px; 
    background: rgba(255,255,255,0.2);
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 8px;
    overflow: hidden;
}

.leaderboard-container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start; 
    align-items: center;
    padding: 5px;
    box-sizing: border-box;
    overflow: hidden;
}

.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8em;
    margin-top: 20px; 
    table-layout: fixed; 
}

.leaderboard-table tr {
    display: table-row;
    border-bottom: 1px solid #ddd;
}

.leaderboard-table td {
    text-align: left;
    padding: 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.leaderboard-table td:first-child {
    width: 40%; 
}

.leaderboard-table td:nth-child(2) {
    width: 30%; 
}

.leaderboard-table td:last-child {
    text-align: right;
    width: 30%; 
}

.leaderboard-item {
    display: flex;
    justify-content: space-between;
    width: 100%;
    padding: 5px 0;
}

.leaderboard-item span {
    margin-left: 15px; 
    flex: 1; 
}

.leaderboard-item:first-child {
    margin-top: 10px;
}
li a {
    cursor: pointer; 
}