/* ===============================================
   LOAN CALCULATOR - USING MODERNTOOLS UNIFIED THEME
   =============================================== */

/* Use modern tools color scheme */
:root {
    --primary-color: #3B82F6;
    --secondary-color: #10B981;
    --accent-color: #8B5CF6;
    --text-color: #111827;
    --text-secondary: #4B5563;
    --text-tertiary: #6B7280;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --border-color: #E5E7EB;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-base: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;    
    --radius-2xl: 1.5rem;
    
    /* Gray color scale for consistency */
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    
    /* Additional colors for loan calculator functionality */
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --danger-color: #EF4444;
    --info-color: #3B82F6;
      /* Chart colors */
    --chart-primary: #3B82F6;
    --chart-secondary: #10B981;
    --chart-tertiary: #8B5CF6;
    --chart-quaternary: #F59E0B;
    --chart-danger: #EF4444;
    
    /* Aliases for compatibility */
    --brand-primary: var(--primary-color);
    --brand-secondary: var(--secondary-color);
    --text-primary: var(--text-color);
}

/* Dark theme using exact same colors as retirement calculator */
[data-theme="dark"] {
    --primary-color: #60A5FA;
    --secondary-color: #34D399;
    --accent-color: #A78BFA;
    --text-color: #F9FAFB;
    --text-secondary: #D1D5DB;
    --text-tertiary: #9CA3AF;
    --bg-primary: #111827;
    --bg-secondary: #1F2937;
    --bg-tertiary: #374151;
    --border-color: #374151;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
      /* Chart colors for dark theme */
    --chart-primary: #60A5FA;
    --chart-secondary: #34D399;
    --chart-tertiary: #A78BFA;
    --chart-quaternary: #FBBF24;
    --chart-danger: #F87171;
}

/* Main Layout */
.main-content {
    min-height: 100vh;
}

/* ===============================================
   HERO SECTION STYLES (Based on retirement calculator)
   =============================================== */

.tool-hero {
    margin-top: 0;
    padding: 120px 0 80px;
    position: relative;
    z-index: 2;
    background: linear-gradient(135deg, var(--bg-primary) 0%, rgba(59, 130, 246, 0.1) 30%, rgba(16, 185, 129, 0.1) 70%, var(--bg-primary) 100%);
    overflow: hidden;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 3;
}

.hero-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    margin: 0 auto 30px auto;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.hero-icon i {
    font-size: 3rem;
    color: white;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    z-index: 2;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-color);
    margin: 0 0 20px 0;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);    background: linear-gradient(135deg, var(--text-color) 0%, var(--primary-color) 50%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* Responsive hero adjustments */
@media (max-width: 768px) {
    .tool-hero {
        padding: 100px 0 60px;
    }
    
    .hero-icon {
        width: 80px;
        height: 80px;
        margin-bottom: 25px;
    }
    
    .hero-icon i {
        font-size: 2.5rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
        margin-bottom: 15px;
    }
    
    .hero-content p {
        font-size: 1.1rem;
        padding: 0 20px;
    }
}

@media (max-width: 480px) {
    .tool-hero {
        padding: 80px 0 50px;
    }
    
    .hero-icon {
        width: 70px;
        height: 70px;
        margin-bottom: 20px;
    }
    
    .hero-icon i {
        font-size: 2rem;
    }
    
    .hero-content h1 {
        font-size: 2rem;
        margin-bottom: 12px;
    }
    
    .hero-content p {
        font-size: 1rem;
        padding: 0 15px;
    }
}

/* ===============================================
   CALCULATOR SECTION STYLES
   =============================================== */

/* Loan calculator specific styling */
.calculator-main {
    padding: 2rem 0 4rem;
    min-height: calc(100vh - 200px);
}

.calculator-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Calculator Tabs */
.calculator-tabs {
    display: flex;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 0.25rem;
    margin-bottom: 2rem;
    overflow-x: auto;
    scrollbar-width: none;
}

.calculator-tabs::-webkit-scrollbar {
    display: none;
}

.tab-button {
    flex: 1;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    border-radius: var(--radius-base);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    min-width: 120px;
    min-height: 44px; /* Touch-friendly minimum */
}

.tab-button:hover {
    color: var(--text-color);
    background: rgba(59, 130, 246, 0.1);
}

.tab-button.active {
    background: #2563EB;
    color: white;
    box-shadow: var(--shadow-sm);
}

/* Calculator Card */
.calculator-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    contain: layout style;
    will-change: auto;
}

/* Display Area */
.calculator-display {
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    color: white;
    padding: 2rem;
    text-align: center;
}

.display-result {
    margin-bottom: 0.5rem;
}

.result-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.25rem;
}

.result-unit {
    font-size: 0.875rem;
    font-weight: 500;
    opacity: 0.9;
}

.display-formula {
    font-size: 0.875rem;
    opacity: 0.8;
    font-weight: 400;
}

/* Input Sections */
.calculator-inputs {
    padding: 2rem;
}

.input-section {
    display: none;
}

.input-section.active {
    display: block;
}

.input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    contain: layout;
}

.input-group {
    display: flex;
    flex-direction: column;
}

.input-group label {
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.input-group input,
.input-group select {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-base);
    font-size: 1rem;
    transition: all 0.2s ease;
    background: var(--bg-primary);
    color: var(--text-color);
    min-height: 44px; /* Touch-friendly minimum */
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.input-group input:invalid {
    border-color: var(--danger-color);
}

.input-error {
    color: var(--danger-color);
    font-size: 0.75rem;
    margin-top: 0.25rem;
    min-height: 1rem;
}

/* Amortization Controls */
.amortization-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

/* Comparison Grid */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

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

.loan-comparison h4 {
    margin-bottom: 1rem;
    color: var(--text-color);
    font-weight: 600;
}

/* Action Buttons */
.calculator-actions {
    padding: 1.5rem 2rem 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    border-top: 1px solid var(--border-color);
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-base);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    min-height: 44px; /* Touch-friendly minimum */
    min-width: 120px;
    justify-content: center;
}

.btn-primary {
    background: #2563EB;
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    background: #2563EB;
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
}

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

.btn-success:hover {
    background: #059669;
}

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

.btn-info:hover {
    background: #2563EB;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    min-height: 36px;
    min-width: auto;
}

/* Results Container */
.results-container {
    margin-top: 2rem;
    contain: layout style;
    will-change: contents;
}

/* Summary Cards */
.results-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
    contain: layout;
}

.summary-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.summary-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.summary-icon {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.summary-content h3 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.summary-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
}

/* Charts Container */
.charts-container {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
    overflow: hidden;
}

.chart-tabs {
    display: flex;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
}

.chart-tab {
    padding: 1rem 1.5rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    min-height: 44px;
}

.chart-tab:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--text-color);
}

.chart-tab.active {
    background: #2563EB;
    color: white;
}

.chart-container {
    padding: 2rem;
    height: 400px;
    position: relative;
    contain: layout;
    transform: translateZ(0);
}

/* Amortization Table */
.amortization-container {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    contain: layout style;
}

.table-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.table-header h3 {
    margin: 0;
    color: var(--text-color);
    font-weight: 600;
}

.table-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.pagination-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.table-wrapper {
    overflow-x: auto;
    max-height: 600px;
    overflow-y: auto;
    contain: layout;
    transform: translateZ(0);
}

.amortization-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    contain: layout;
}

.amortization-table th {
    background: var(--bg-secondary);
    color: var(--text-color);
    font-weight: 600;
    padding: 1rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
    cursor: pointer;
    transition: background-color 0.2s ease;
    min-height: 44px;
}

.amortization-table th:hover {
    background: var(--bg-tertiary);
}

.amortization-table th.sortable::after {
    content: " ↕";
    opacity: 0.5;
    font-size: 0.75rem;
}

.amortization-table th.sorted-asc::after {
    content: " ↑";
    opacity: 1;
    color: var(--primary-color);
}

.amortization-table th.sorted-desc::after {
    content: " ↓";
    opacity: 1;
    color: var(--primary-color);
}

.amortization-table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
}

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

.amortization-table tbody tr:nth-child(even) {
    background: rgba(59, 130, 246, 0.02);
}

/* Table Pagination */
.table-pagination {
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 1rem;
}

.pagination-pages {
    display: flex;
    gap: 0.25rem;
}

.pagination-pages button {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-color);
    border-radius: var(--radius-base);
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 36px;
    min-width: 36px;
}

.pagination-pages button:hover {
    background: var(--bg-secondary);
}

.pagination-pages button.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .calculator-main {
        padding: 1rem 0 2rem;
    }

    .calculator-inputs {
        padding: 1.5rem;
    }

    .input-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .comparison-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .calculator-actions {
        padding: 1rem 1.5rem 1.5rem;
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .results-summary {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .summary-card {
        padding: 1rem;
    }

    .summary-icon {
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1rem;
    }

    .summary-value {
        font-size: 1.25rem;
    }

    .chart-container {
        padding: 1rem;
        height: 300px;
    }

    .table-header {
        padding: 1rem;
        flex-direction: column;
        align-items: stretch;
    }

    .table-controls {
        justify-content: space-between;
    }

    .amortization-table th,
    .amortization-table td {
        padding: 0.5rem;
        font-size: 0.75rem;
    }

    .table-pagination {
        padding: 0.75rem 1rem;
        flex-direction: column;
        align-items: stretch;
    }

    .tab-button {
        min-width: 100px;
        font-size: 0.8rem;
        padding: 0.5rem 0.75rem;
    }

    .result-value {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .calculator-tabs {
        padding: 0.125rem;
    }

    .tab-button {
        min-width: 80px;
        font-size: 0.75rem;
        padding: 0.5rem;
    }

    .result-value {
        font-size: 1.75rem;
    }

    .chart-container {
        height: 250px;
    }

    .amortization-table {
        font-size: 0.7rem;
    }

    .amortization-table th,
    .amortization-table td {
        padding: 0.375rem 0.25rem;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .calculator-card {
        border-width: 2px;
    }

    .input-group input,
    .input-group select {
        border-width: 2px;
    }

    .btn {
        border-width: 2px;
        border-style: solid;
    }

    .btn-primary {
        border-color: #2563EB;
    }

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

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .calculator-actions,
    .chart-tabs {
        display: none !important;
    }

    .calculator-main {
        padding: 0;
    }

    .calculator-card,
    .results-container,
    .charts-container,
    .amortization-container {
        box-shadow: none;
        border: 1px solid #000;
        break-inside: avoid;
    }

    .chart-container {
        height: 300px;
    }

    .amortization-table {
        font-size: 10px;
    }

    .results-summary {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 1rem !important;
    }
}

/* Focus Management for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1000;
}

.skip-link:focus {
    top: 6px;
}

/* Screen Reader Only Content */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Error State Animations */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.input-group.error input {
    animation: shake 0.3s ease-in-out;
    border-color: var(--danger-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Success State */
.input-group.success input {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}