/* Custom application styles */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
}

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

/* Navbar customization */
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

/* Cards */
.card {
    border: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Buttons */
.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

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

/* Forms */
.form-control,
.form-select {
    border-radius: 0.375rem;
    border: 1px solid #dee2e6;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* Badges */
.badge {
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
}

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

/* Footer */
footer {
    background-color: #212529;
    color: #fff;
    margin-top: 3rem;
    padding: 2rem 0;
}

/* Responsive spacing */
@media (max-width: 768px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* Loading spinner */
.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Utility classes */
.text-primary {
    color: var(--primary-color) !important;
}

.text-success {
    color: var(--success-color) !important;
}

.text-danger {
    color: var(--danger-color) !important;
}

.text-warning {
    color: var(--warning-color) !important;
}

.text-info {
    color: var(--info-color) !important;
}