/* Professional Credit Calculator - Light & Dark Theme */

:root {
    /* Light Theme Colors */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #64748b;
    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    
    /* Light Theme Background & Text */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    /* Light Theme Borders & Shadows */
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Common Variables */
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.2s ease;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: #334155;
    --border-hover: #475569;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
}

/* Base Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    transition: var(--transition);
}

/* Header */
.header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .d-flex {
    align-items: center;
    flex-wrap: nowrap;
}

.brand h1 {
    color: var(--text-primary);
}

.brand small {
    color: var(--text-muted);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: nowrap;
}

/* Theme Toggle Button */
.btn-icon {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-icon:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

/* Main Content */
.main-content {
    padding: 2rem 0;
    min-height: calc(100vh - 80px);
}

/* Calculator Card */
.calculator-card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-control, .form-select {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius);
    padding: 0.75rem;
    transition: var(--transition);
    width: 100%;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
    outline: none;
    background-color: var(--bg-primary);
}

.form-text {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: 0.25rem;
    display: block;
}

.input-group-text {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: var(--radius) 0 0 var(--radius);
    font-weight: 600;
}

/* Service Tabs */
.service-tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.service-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.service-tab:hover {
    border-color: var(--primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.service-tab i {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.service-tab span {
    font-size: 0.75rem;
    font-weight: 500;
}

.btn-check:checked + .service-tab {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* Range Slider */
.form-range {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.form-range::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.form-range::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-sm);
}

.profit-value {
    color: var(--primary);
    font-weight: 700;
    font-size: 1.1em;
}

.range-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Config Grid */
.config-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.config-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
}

.config-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.config-label .btn {
    font-size: 0.7rem;
    padding: 0.125rem 0.25rem;
    line-height: 1;
}

.config-value {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    border-radius: var(--radius);
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid transparent;
}

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

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

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

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

.btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--text-secondary);
    background-color: transparent;
}

.btn-outline-secondary:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.calculate-btn {
    font-size: 1.1rem;
    padding: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Results Section */
.results-section {
    animation: fadeInUp 0.3s ease;
}

.results-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.results-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.results-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.results-header i {
    font-size: 1.5rem;
}

.results-grid {
    display: grid;
    gap: 0.75rem;
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.result-row:last-child {
    border-bottom: none;
}

.result-row.highlight {
    background-color: var(--bg-tertiary);
    margin: 0 -0.75rem;
    padding: 0.75rem;
    border-radius: var(--radius);
    border: none;
}

.result-label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.result-value {
    font-weight: 600;
    color: var(--text-primary);
}

.result-value.credits {
    color: var(--success);
    font-size: 1.25rem;
    font-weight: 700;
}

.result-value.price {
    color: var(--primary);
    font-size: 1.1rem;
    font-weight: 700;
}

/* Examples Section */
.examples-section {
    margin-top: 2rem;
}

.examples-section h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.examples-grid {
    display: grid;
    gap: 0.5rem;
}

.example-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.example-item:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--primary);
    color: var(--text-primary);
    text-decoration: none;
}

.example-item .badge {
    background-color: var(--primary);
    color: white;
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

/* Comparison Section */
.comparison-section {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    margin-top: 2rem;
    overflow: hidden;
}

.section-header {
    background-color: var(--primary);
    color: white;
    padding: 1rem 1.5rem;
    margin: 0;
}

.section-header h3 {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
}

.comparison-table th,
.comparison-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.comparison-table th {
    background-color: var(--bg-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.comparison-table tbody tr:hover {
    background-color: var(--bg-secondary);
}

.comparison-table .table-active {
    background-color: var(--primary);
    color: white;
}

.comparison-table .table-active:hover {
    background-color: var(--primary-hover);
    color: white;
}

/* Modal Styles */
.modal-content {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.modal-body .table {
    color: var(--text-primary);
}

.modal-body .table th {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.modal-body .table td {
    border-color: var(--border-color);
}

.modal .btn-close {
    filter: var(--bs-btn-close-white-filter, none);
    opacity: 0.7;
}

[data-theme="dark"] .modal .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* Alerts */
.alert {
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.alert-info {
    background-color: rgba(37, 99, 235, 0.1);
    border-color: rgba(37, 99, 235, 0.2);
    color: var(--primary);
}

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

/* Responsive Design */
@media (max-width: 992px) {
    .calculator-card {
        padding: 1.5rem;
    }
    
    .config-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .service-tabs {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .header-actions {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        flex-wrap: nowrap;
    }
    
    .header-actions .btn {
        font-size: 0.875rem;
        padding: 0.375rem 0.75rem;
        white-space: nowrap;
    }
}

@media (max-width: 576px) {
    .main-content {
        padding: 1rem 0;
    }
    
    .calculator-card {
        padding: 1rem;
        margin: 0 1rem;
    }
    
    .brand h1 {
        font-size: 1.25rem;
    }
    
    .brand small {
        font-size: 0.75rem;
    }
    
    .header-actions {
        flex-wrap: nowrap;
        gap: 0.25rem;
    }
    
    .header-actions .btn span {
        display: none;
    }
    
    .header-actions .btn {
        padding: 0.25rem 0.5rem;
        font-size: 0.75rem;
    }
    
    .comparison-section {
        margin: 1rem;
    }
}

/* Print Styles */
@media print {
    .header-actions,
    .examples-section,
    .btn {
        display: none !important;
    }
    
    .calculator-card,
    .comparison-section {
        box-shadow: none;
        border: 1px solid #000;
    }
}