:root {
    --primary-color: #0056b3;
    --primary-dark: #003d82;
    --accent-color: #28a745;
    --bg-light: #f4f6f9;
}

body {
    background-color: var(--bg-light);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #333;
    margin: 0;
    padding-bottom: 30px;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}

/* Navbar Customization */
.navbar {
    background-color: var(--primary-color) !important;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

/* Navigation Pills for PWA App feel */
.nav-pills .nav-link {
    color: #555;
    background-color: #ffffff;
    border: 1px solid #dee2e6;
    margin: 2px;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s ease-in-out;
}

.nav-pills .nav-link.active {
    background-color: var(--primary-color) !important;
    color: #fff !important;
    border-color: var(--primary-color);
}

/* Card Enhancements */
.card {
    border-radius: 12px;
    border: none;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card-header {
    border-top-left-radius: 12px !important;
    border-top-right-radius: 12px !important;
    font-weight: 600;
}

/* Custom Audio Player Styling */
audio {
    max-width: 100%;
    outline: none;
}

/* Mobile Responsiveness Rules */
@media (max-width: 768px) {
    .container {
        padding-left: 10px;
        padding-right: 10px;
    }
    
    .nav-pills {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 5px;
    }

    .nav-pills .nav-link {
        white-space: nowrap;
        font-size: 0.82rem;
        padding: 8px 12px;
    }

    .card {
        margin-bottom: 12px;
    }
}

/* Offline Banner */
#offlineBanner {
    display: none;
    background-color: #ff9800;
    color: #fff;
    text-align: center;
    padding: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 9999;
}