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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    color: white;
    margin-bottom: 30px;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.card h2 {
    color: #667eea;
    margin-bottom: 20px;
    border-bottom: 2px solid #667eea;
    padding-bottom: 10px;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    color: #333;
    font-weight: 500;
}

input, textarea, select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1em;
    transition: border-color 0.3s;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 5px rgba(102, 126, 234, 0.2);
}

button {
    background: #667eea;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 500;
    transition: background 0.3s;
}

button:hover {
    background: #764ba2;
}

button.delete {
    background: #e74c3c;
    padding: 5px 10px;
    font-size: 0.9em;
}

button.delete:hover {
    background: #c0392b;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th {
    background: #f5f5f5;
    color: #333;
    padding: 12px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid #ddd;
}

td {
    padding: 12px;
    border-bottom: 1px solid #eee;
}

tr:hover {
    background: #f9f9f9;
}

.leaderboard {
    grid-column: 1 / -1;
}

.medal {
    display: inline-block;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    text-align: center;
    line-height: 30px;
    font-weight: bold;
    color: white;
    margin-right: 10px;
}

.gold { background: #ffd700; color: #333; }
.silver { background: #c0c0c0; color: #333; }
.bronze { background: #cd7f32; }

.player-list {
    list-style: none;
}

.player-item {
    background: #f9f9f9;
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.player-info {
    flex-grow: 1;
}

.player-name {
    font-weight: 600;
    color: #333;
}

.actions {
    display: flex;
    gap: 10px;
}

.success {
    color: #27ae60;
    padding: 10px;
    background: #d5f4e6;
    border-radius: 5px;
    margin-bottom: 15px;
}

.error {
    color: #e74c3c;
    padding: 10px;
    background: #fadbd8;
    border-radius: 5px;
    margin-bottom: 15px;
}

@media (max-width: 768px) {
    .content {
        grid-template-columns: 1fr;
    }

    .leaderboard {
        grid-column: 1;
    }

    h1 {
        font-size: 1.8em;
    }
}