* {
    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;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    overflow: hidden;
    padding: 30px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e0e0e0;
}

header h1 {
    color: #667eea;
    font-size: 2.5em;
    margin-bottom: 10px;
}

header p {
    color: #666;
    font-size: 1.1em;
}

.user-info {
    background: #f5f5f5;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 30px;
    display: flex;
    gap: 15px;
}

.user-info input {
    flex: 1;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
}

.next-game-section {
    background: #f9f9f9;
    padding: 20px;
    border-radius: 10px;
}

.game-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    margin: 15px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.game-date {
    font-size: 1.2em;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 10px;
}

.players-count {
    color: #666;
    margin: 10px 0;
}

.players-list {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid #e0e0e0;
}

.players-list summary {
    cursor: pointer;
    color: #667eea;
    font-weight: bold;
}

.players-list ul {
    margin-top: 10px;
    padding-left: 20px;
}

.players-list li {
    padding: 5px 0;
    color: #555;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn-primary {
    background: #667eea;
    color: white;
    width: 100%;
}

.btn-success {
    background: #48bb78;
    color: white;
}

.btn-danger {
    background: #f56565;
    color: white;
}

.games-list {
    display: grid;
    gap: 15px;
    max-height: 500px;
    overflow-y: auto;
}

.game-item {
    background: #f9f9f9;
    padding: 15px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s;
}

.game-item:hover {
    background: #e8e8e8;
    transform: translateX(5px);
}

.game-item .date {
    font-weight: bold;
    color: #667eea;
}

.game-item .count {
    color: #666;
}

.game-item button {
    padding: 8px 16px;
    background: #48bb78;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 15px;
    max-width: 400px;
    text-align: center;
}

.modal-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: 10px;
    background: #48bb78;
    color: white;
    display: none;
    z-index: 1001;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.loading {
    text-align: center;
    color: #999;
    padding: 20px;
}

@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .user-info {
        flex-direction: column;
    }
}