:root {
    --gcse-primary: #0066cc;
    --gcse-success: #28a745;
    --gcse-warning: #ffc107;
    --gcse-danger: #dc3545;
    --gcse-info: #17a2b8;
}

/* Custom progress ring animation */
.progress-ring circle {
    transition: stroke-dashoffset 0.5s ease-in-out;
}

/* Custom card hover effects */
.card:hover {
    transform: translateY(-2px);
    transition: transform 0.2s ease-in-out;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Subject badges */
.badge.bg-success {
    background-color: var(--gcse-danger) !important;
}

.badge.bg-warning {
    background-color: var(--gcse-warning) !important;
    color: #000 !important;
}

.badge.bg-info {
    background-color: var(--gcse-info) !important;
}

/* Task completion styles */
.opacity-75 {
    opacity: 0.75;
}

/* Navigation improvements */
.nav-pills .nav-link.active {
    background-color: var(--gcse-primary) !important;
}

/* Progress bars */
.progress-bar {
    background-color: var(--gcse-success);
}

/* Form improvements */
.subject-entry {
    transition: all 0.3s ease;
}

.subject-entry:hover {
    background-color: rgba(0,0,0,0.02);
}

/* Button improvements */
.btn-primary {
    background-color: var(--gcse-primary);
    border-color: var(--gcse-primary);
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

/* Responsive improvements */
@media (max-width: 768px) {
    .btn-group {
        flex-direction: column;
    }
    
    .btn-group .btn {
        border-radius: 0.375rem !important;
        margin-bottom: 0.25rem;
    }
    
    .nav-pills {
        flex-direction: column;
    }
    
    .nav-pills .nav-link {
        margin-bottom: 0.25rem;
        text-align: center;
    }
}

/* Loading states */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Custom alerts */
.alert {
    border: none;
    border-radius: 0.5rem;
}

/* Table improvements for mobile */
@media (max-width: 576px) {
    .table-responsive {
        font-size: 0.875rem;
    }
}

/* Animation for new elements */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.3s ease-out;
}

/* Custom scrollbar for webkit browsers */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bs-border-color);
}

::-webkit-scrollbar-thumb {
    background: var(--bs-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bs-primary);
}

/* Focus improvements for accessibility */
.btn:focus,
.form-control:focus,
.form-select:focus {
    box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
}

/* Light mode specific improvements */
[data-bs-theme="light"] .card {
    border-color: rgba(0, 0, 0, 0.125);
    background-color: #ffffff;
}

[data-bs-theme="light"] .progress {
    background-color: rgba(0, 0, 0, 0.1);
}

[data-bs-theme="light"] .list-group-item {
    background-color: #ffffff;
    border-color: rgba(0, 0, 0, 0.125);
}

body {
    background-color: #F9F9F9;
}

/* Print styles */
@media print {
    .navbar,
    .btn,
    footer {
        display: none !important;
    }
    
    .card {
        border: 1px solid #000 !important;
        break-inside: avoid;
    }
    
    .container {
        max-width: none !important;
    }
}