body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

.card {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    border: 1px solid rgba(0, 0, 0, 0.125);
}

.card-header {
    font-weight: 600;
}

.btn {
    border-radius: 0.375rem;
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

.badge {
    font-size: 0.75em;
}

/* Bet buttons */
.btn-outline-success:hover, .btn-outline-warning:hover, .btn-outline-info:hover {
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .btn-group {
        width: 100%;
    }
    
    .btn-group .btn {
        flex: 1;
    }
}

/* Match cards */
.match-card {
    transition: transform 0.2s;
}

.match-card:hover {
    transform: translateY(-2px);
}

/* Loading spinner */
.loading-spinner {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    border: 0.25em solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner-border 0.75s linear infinite;
}

@keyframes spinner-border {
    to { transform: rotate(360deg); }
}

.sticky-top {
    position: sticky;
    top: 20px;
}