/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-navy: #1e3a5f;
    --secondary-navy: #2d5a8a;
    --light-navy: #4a7ba7;
    --bg-gray: #f5f7fa;
    --border-gray: #e1e8ed;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;
    --success-light: #d5f4e6;
    --warning-light: #fef5e7;
    --danger-light: #fadbd8;
}

body {
    font-family: 'Inter', 'Calibri', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 400;
    color: var(--text-dark);
    background-color: var(--bg-gray);
    line-height: 1.6;
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    background-color: white;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-navy);
}

.header-actions {
    display: flex;
    gap: 0.75rem;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

/* Export Dropdown */
.export-dropdown {
    position: relative;
}

.export-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: white;
    border: 1px solid var(--border-gray);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    min-width: 200px;
    z-index: 1000;
}

.export-menu.active {
    display: block;
}

.export-option {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    text-align: left;
    background: none;
    border: none;
    font-size: 0.875rem;
    color: var(--text-dark);
    cursor: pointer;
    transition: background-color 0.2s;
}

.export-option:hover {
    background-color: var(--bg-gray);
}

.export-option:first-child {
    border-radius: 4px 4px 0 0;
}

.export-option:last-child {
    border-radius: 0 0 4px 4px;
}

/* Tab Navigation */
.tab-navigation {
    background-color: white;
    border-bottom: 1px solid var(--border-gray);
    padding: 0 2rem;
    display: flex;
    gap: 0;
    overflow-x: auto;
}

.tab-btn {
    background: none;
    border: none;
    padding: 1rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-light);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--primary-navy);
    background-color: var(--bg-gray);
}

.tab-btn.active {
    color: var(--primary-navy);
    border-bottom-color: var(--primary-navy);
    background-color: transparent;
}

/* Tab Content */
.tab-content-container {
    flex: 1;
    padding: 2rem;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.tab-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.tab-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-navy);
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background-color: white;
    color: var(--primary-navy);
    border: 1px solid var(--border-gray);
}

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

.btn-danger {
    padding: 0.375rem 0.75rem;
    background-color: var(--danger);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-edit {
    padding: 0.375rem 0.75rem;
    background-color: var(--light-navy);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-right: 0.5rem;
}

.btn-edit:hover {
    background-color: var(--secondary-navy);
}

.btn-edit:hover {
    background-color: var(--secondary-navy);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

/* Loans Section */
.loans-section {
    margin: 2rem 0 1.5rem 0;
    padding: 1.5rem;
    background-color: var(--bg-gray);
    border-radius: 6px;
    border: 1px solid var(--border-gray);
}

.loans-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.loans-header h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-navy);
}

#loansContainer {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.loan-card {
    background-color: white;
    padding: 1.25rem;
    border-radius: 6px;
    border: 1px solid var(--border-gray);
    position: relative;
}

.loan-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.loan-card-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-navy);
}

.loan-remove-btn {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.25rem;
    line-height: 1;
}

.loan-remove-btn:hover {
    color: #c0392b;
}

.loan-fields {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.loan-field {
    display: flex;
    flex-direction: column;
}

.loan-field label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 0.375rem;
}

.loan-field input,
.loan-field select {
    padding: 0.5rem;
    border: 1px solid var(--border-gray);
    border-radius: 4px;
    font-size: 0.875rem;
    font-family: inherit;
}

.loan-field input:focus,
.loan-field select:focus {
    outline: none;
    border-color: var(--primary-navy);
}

.loans-empty {
    text-align: center;
    color: var(--text-light);
    padding: 2rem;
    font-style: italic;
}

/* KPI Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.kpi-card {
    background: white;
    padding: 1.5rem;
    border-radius: 6px;
    border: 1px solid var(--border-gray);
}

.kpi-label {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.kpi-value {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--primary-navy);
}

/* Charts */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.chart-container {
    background: white;
    padding: 1.5rem;
    border-radius: 6px;
    border: 1px solid var(--border-gray);
}

.chart-container.full-width {
    grid-column: 1 / -1;
}

.chart-container h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-navy);
    margin-bottom: 1rem;
}

.chart-wrapper {
    position: relative;
}

/* Table */
.table-container {
    background: white;
    border-radius: 6px;
    border: 1px solid var(--border-gray);
    overflow-x: auto;
}

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

.data-table thead {
    background-color: var(--bg-gray);
    position: sticky;
    top: 0;
    z-index: 10;
}

.data-table th {
    padding: 0.875rem 0.75rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border-gray);
    white-space: nowrap;
}

.data-table td {
    padding: 0.875rem 0.75rem;
    border-bottom: 1px solid var(--border-gray);
    color: var(--text-dark);
}

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

.data-table .empty-state {
    text-align: center;
    color: var(--text-light);
    font-style: italic;
}

.data-table .auto-calc {
    font-weight: 500;
    color: var(--primary-navy);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: white;
    border-radius: 8px;
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

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

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-navy);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.modal-close:hover {
    background-color: var(--bg-gray);
}

/* Form */
#propertyForm {
    padding: 1.5rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

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

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 0.375rem;
}

.form-group input,
.form-group select {
    padding: 0.625rem;
    border: 1px solid var(--border-gray);
    border-radius: 4px;
    font-size: 0.875rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-navy);
}

/* Strategy-specific fields */
.rental-only,
.sale-only {
    transition: opacity 0.3s;
}

.form-group.hidden-field {
    display: none;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-gray);
}

/* Stress Test */
.stress-test-container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
}

.input-panel,
.results-panel {
    background: white;
    padding: 1.5rem;
    border-radius: 6px;
    border: 1px solid var(--border-gray);
}

.input-panel h3,
.results-panel h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-navy);
    margin-bottom: 1.25rem;
}

.input-grid {
    display: grid;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

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

.input-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 0.375rem;
}

.input-group input {
    padding: 0.625rem;
    border: 1px solid var(--border-gray);
    border-radius: 4px;
    font-size: 0.875rem;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.metric-card {
    padding: 1.25rem;
    border: 1px solid var(--border-gray);
    border-radius: 6px;
    background-color: var(--bg-gray);
}

.metric-card.healthy {
    background-color: var(--success-light);
    border-color: var(--success);
}

.metric-card.caution {
    background-color: var(--warning-light);
    border-color: var(--warning);
}

.metric-card.danger {
    background-color: var(--danger-light);
    border-color: var(--danger);
}

.metric-label {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-navy);
}

.metric-change {
    font-size: 0.8rem;
    margin-top: 0.375rem;
    font-weight: 500;
}

.metric-change.positive {
    color: var(--success);
}

.metric-change.negative {
    color: var(--danger);
}

/* Info Badge */
.info-badge {
    padding: 0.5rem 1rem;
    background-color: var(--primary-navy);
    color: white;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Responsive */
@media (max-width: 1024px) {
    .stress-test-container {
        grid-template-columns: 1fr;
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .kpi-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .tab-content-container {
        padding: 1rem;
    }
}

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

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

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