* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    background-color: #f5f5f5;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #2e2e2e;
    margin-bottom: 1rem;
}

form {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
}

input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

button {
    padding: 0.5rem 1rem;
    background-color: #6b4fbb;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

button:hover {
    background-color: #5a3ea3;
}

.stats {
    text-align: center;
    margin: 1rem 0;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: 4px;
}

.leaderboard {
    margin-top: 2rem;
}

.leaderboard h2 {
    text-align: center;
    margin-bottom: 1rem;
}

.leaderboard-entry {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem;
    border-bottom: 1px solid #eee;
    align-items: center;
}

.leaderboard-entry:nth-child(even) {
    background-color: #f8f9fa;
}

.error {
    color: #dc3545;
    text-align: center;
    margin: 1rem 0;
}