/* Custom CSS Variables */
:root {
    --primary-color: 210 100% 50%; /* #007BFF */
    --secondary-color: 108 32% 47%; /* #6C757D */
    --success-color: 134 61% 41%; /* #28A745 */
    --danger-color: 354 70% 54%; /* #DC3545 */
    --warning-color: 45 100% 51%; /* #FFC107 */
    --info-color: 188 78% 41%; /* #17A2B8 */
    --light-color: 210 17% 95%; /* #F8F9FA */
    --dark-color: 210 11% 15%; /* #212529 */
    --background: 210 11% 98%; /* #F5F7FA */
    --card-shadow: 210 15% 88%; /* #E0E6ED */
    --text-primary: 210 22% 22%; /* #2C3E50 */
    --text-secondary: 210 11% 71%; /* #6C757D */
    --border-color: 210 14% 89%; /* #DEE2E6 */
}

/* Global Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: hsl(var(--background));
    color: hsl(var(--text-primary));
    line-height: 1.6;
}

/* Navigation Styles */
.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.75rem 1rem;
    border-radius: 0.375rem;
    margin: 0 0.25rem;
    transition: all 0.3s ease;
}

.navbar-nav .nav-link:hover {
    background-color: hsl(var(--light-color));
    color: hsl(var(--primary-color)) !important;
}

.navbar-nav .nav-link.active {
    background-color: hsl(var(--primary-color));
    color: white !important;
}

/* Card Styles */
.card {
    border: none;
    border-radius: 0.75rem;
    box-shadow: 0 0.125rem 0.25rem hsl(var(--card-shadow) / 0.075);
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem hsl(var(--card-shadow) / 0.15);
}

.card-header {
    border-radius: 0.75rem 0.75rem 0 0 !important;
    border-bottom: 1px solid hsl(var(--border-color));
    font-weight: 600;
}

/* Section Titles */
.section-title {
    color: hsl(var(--text-primary));
    border-bottom: 2px solid hsl(var(--primary-color));
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

/* Form Styles */
.form-label {
    font-weight: 600;
    color: hsl(var(--text-primary));
    margin-bottom: 0.5rem;
}

.form-control, .form-select {
    border: 1px solid hsl(var(--border-color));
    border-radius: 0.5rem;
    padding: 0.75rem;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

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

.form-control:invalid {
    border-color: hsl(var(--danger-color));
}

/* Logo Upload Styles */
.logo-upload-container {
    position: relative;
}

.logo-preview {
    max-width: 200px;
    max-height: 100px;
    border: 2px dashed hsl(var(--border-color));
    border-radius: 0.5rem;
    padding: 1rem;
    text-align: center;
    background-color: hsl(var(--light-color));
}

.logo-preview img {
    max-width: 100%;
    max-height: 80px;
    object-fit: contain;
}

.logo-preview.has-image {
    border-style: solid;
    border-color: hsl(var(--success-color));
    background-color: hsl(var(--success-color) / 0.1);
}

/* Items Table Styles */
.table {
    border-radius: 0.5rem;
    overflow: hidden;
}

.table thead th {
    background-color: hsl(var(--primary-color));
    color: white;
    border: none;
    font-weight: 600;
    padding: 1rem 0.75rem;
}

.table tbody td {
    padding: 0.75rem;
    vertical-align: middle;
    border-color: hsl(var(--border-color));
}

.item-row input {
    border: 1px solid hsl(var(--border-color));
    border-radius: 0.375rem;
    padding: 0.5rem;
}

.item-amount {
    font-weight: 600;
    color: hsl(var(--success-color));
    font-size: 1.1rem;
}

/* Payment Methods Styles */
.payment-methods .form-check {
    margin-bottom: 0.75rem;
    padding: 0.75rem;
    border-radius: 0.5rem;
    transition: background-color 0.3s ease;
}

.payment-methods .form-check:hover {
    background-color: hsl(var(--light-color));
}

.payment-methods .form-check-input:checked + .form-check-label {
    color: hsl(var(--primary-color));
    font-weight: 600;
}

.payment-details {
    background-color: hsl(var(--light-color));
    border-radius: 0.5rem;
    padding: 1rem;
    min-height: 150px;
}

/* Button Styles */
.btn {
    border-radius: 0.5rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: hsl(var(--primary-color));
    border-color: hsl(var(--primary-color));
    box-shadow: 0 0.25rem 0.5rem hsl(var(--primary-color) / 0.3);
}

.btn-primary:hover {
    background-color: hsl(var(--primary-color) / 0.9);
    border-color: hsl(var(--primary-color) / 0.9);
    transform: translateY(-1px);
    box-shadow: 0 0.5rem 1rem hsl(var(--primary-color) / 0.4);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-outline-primary {
    border: 2px solid hsl(var(--primary-color));
    color: hsl(var(--primary-color));
}

.btn-outline-primary:hover {
    background-color: hsl(var(--primary-color));
    border-color: hsl(var(--primary-color));
    color: white;
}

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

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

/* Totals Card */
.card .card-body .d-flex {
    padding: 0.25rem 0;
}

.card .card-body .fw-bold {
    font-size: 1.2rem;
}

/* Alert Styles */
.alert {
    border-radius: 0.5rem;
    border: none;
    font-weight: 500;
}

.alert-success {
    background-color: hsl(var(--success-color) / 0.1);
    color: hsl(var(--success-color));
    border-left: 4px solid hsl(var(--success-color));
}

.alert-danger {
    background-color: hsl(var(--danger-color) / 0.1);
    color: hsl(var(--danger-color));
    border-left: 4px solid hsl(var(--danger-color));
}

.alert-warning {
    background-color: hsl(var(--warning-color) / 0.1);
    color: hsl(45 100% 35%);
    border-left: 4px solid hsl(var(--warning-color));
}

.alert-info {
    background-color: hsl(var(--info-color) / 0.1);
    color: hsl(var(--info-color));
    border-left: 4px solid hsl(var(--info-color));
}

/* Badge Styles */
.badge {
    font-size: 0.9rem;
    padding: 0.5rem 0.75rem;
}

/* Help Page Styles */
.faq-item {
    border-bottom: 1px solid hsl(var(--border-color));
    padding-bottom: 1rem;
}

.faq-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.help-option {
    padding: 1.5rem;
    border-radius: 0.5rem;
    transition: transform 0.3s ease;
}

.help-option:hover {
    transform: translateY(-5px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.1rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .table thead th {
        padding: 0.5rem 0.25rem;
        font-size: 0.8rem;
    }
    
    .table tbody td {
        padding: 0.5rem 0.25rem;
    }
    
    .item-row input {
        padding: 0.25rem;
        font-size: 0.875rem;
    }
    
    .payment-methods .form-check {
        padding: 0.5rem;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    .card-header {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid hsl(var(--border-color));
    }
    
    body {
        background-color: white;
    }
    
    .table {
        font-size: 0.875rem;
    }
}

/* Loading Spinner */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

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

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

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

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

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

.bg-primary {
    background-color: hsl(var(--primary-color)) !important;
}

.border-primary {
    border-color: hsl(var(--primary-color)) !important;
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-up {
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Focus Styles for Accessibility */
.btn:focus,
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    outline: 2px solid hsl(var(--primary-color));
    outline-offset: 2px;
}

/* Error States */
.is-invalid {
    border-color: hsl(var(--danger-color)) !important;
}

.invalid-feedback {
    color: hsl(var(--danger-color));
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* Success States */
.is-valid {
    border-color: hsl(var(--success-color)) !important;
}

.valid-feedback {
    color: hsl(var(--success-color));
    font-size: 0.875rem;
    margin-top: 0.25rem;
}