/**
 * FERS Retirement Calculator - calculator page styles
 * Forms, results, charts, and tool-specific layout.
 */

/* ========== Calculator page shell ========== */
.calculator-page {
    padding-bottom: var(--spacing-2xl);
}

.calculator-page .page-header {
    text-align: center;
    max-width: 48rem;
    margin-left: auto;
    margin-right: auto;
    padding: var(--spacing-lg) 0 var(--spacing-sm);
}

.calculator-page .page-header h1 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.calculator-page .page-header .subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-light);
    line-height: var(--leading-relaxed);
}

.calculator-section .content-section,
.content-section {
    margin-top: var(--spacing-xl);
}

.content-section h2 {
    margin-top: var(--spacing-lg);
}

.calculator-container {
    max-width: 52rem;
    margin-left: auto;
    margin-right: auto;
}

/* ========== Calculator shell (card) ========== */
.calculator-wrapper {
    background-color: var(--color-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.calculator-header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    padding: var(--spacing-xl);
    text-align: center;
}

.calculator-header h2 {
    color: white;
    margin-bottom: var(--spacing-sm);
    border: none;
}

.calculator-header p {
    opacity: 0.9;
    margin: 0;
}

.calculator-body {
    padding: var(--spacing-xl);
}

/* ========== Calculator form ========== */
.calculator-form {
    margin-bottom: var(--spacing-2xl);
}

.form-section {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-lg);
}

.form-section-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.form-section-title svg {
    width: 24px;
    height: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.currency-input-wrapper {
    position: relative;
}

.currency-symbol {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-light);
    font-weight: var(--font-medium);
    pointer-events: none;
}

.currency-input-wrapper .form-input {
    padding-left: calc(var(--spacing-md) * 2 + 1ch);
}

.date-input-wrapper {
    position: relative;
}

.date-input-wrapper .form-input {
    padding-right: var(--spacing-xl);
}

.tooltip-trigger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin-left: var(--spacing-xs);
    background-color: var(--color-border);
    border-radius: 50%;
    cursor: help;
    position: relative;
}

.tooltip-trigger svg {
    width: 14px;
    height: 14px;
    color: var(--color-text-light);
}

.tooltip-content {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-md);
    background-color: var(--color-text);
    color: white;
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    white-space: nowrap;
    max-width: 250px;
    white-space: normal;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 10;
    margin-bottom: var(--spacing-sm);
}

.tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--color-text);
}

.tooltip-trigger:hover .tooltip-content {
    opacity: 1;
    visibility: visible;
}

.calculate-btn-wrapper {
    margin-top: var(--spacing-xl);
    text-align: center;
}

.calculate-btn {
    min-width: 200px;
    font-size: var(--text-lg);
    padding: var(--spacing-lg) var(--spacing-2xl);
}

/* ========== Calculator results ========== */
.calculator-results {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.calculator-results.visible {
    display: block;
}

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

.results-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.results-header h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.results-summary {
    font-size: var(--text-lg);
    color: var(--color-text-light);
}

.results-main-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.result-highlight-card {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.result-highlight-card .result-label {
    font-size: var(--text-base);
    opacity: 0.9;
    margin-bottom: var(--spacing-sm);
}

.result-highlight-card .result-value {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: white;
}

.result-highlight-card .result-period {
    font-size: var(--text-sm);
    opacity: 0.8;
    margin-top: var(--spacing-xs);
}

.results-secondary-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.result-detail-card {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-secondary);
}

.result-detail-card .result-label {
    font-size: var(--text-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.result-detail-card .result-value {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--color-text);
}

.comparison-section {
    margin-top: var(--spacing-2xl);
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-top: var(--spacing-lg);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.comparison-table thead {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: white;
}

.comparison-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: var(--font-semibold);
}

.comparison-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
}

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

.comparison-table .highlight-cell {
    background-color: rgba(245, 158, 11, 0.1);
    font-weight: var(--font-semibold);
    color: var(--color-secondary);
}

.chart-container {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-lg);
}

.chart-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.chart-wrapper {
    position: relative;
    height: 300px;
}

.results-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-2xl);
}

.save-notice {
    background-color: rgba(16, 185, 129, 0.1);
    border-left: 4px solid var(--color-success);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.save-notice svg {
    width: 24px;
    height: 24px;
    color: var(--color-success);
    flex-shrink: 0;
}

.save-notice p {
    margin: 0;
    font-size: var(--text-sm);
    color: var(--color-text);
}

/* ========== Preset templates ========== */
.presets-section {
    margin-bottom: var(--spacing-xl);
}

.presets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.preset-btn {
    padding: var(--spacing-md);
    background-color: var(--color-bg-alt);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.preset-btn:hover {
    border-color: var(--color-primary);
    background-color: rgba(30, 58, 138, 0.05);
}

.preset-btn .preset-title {
    font-weight: var(--font-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.preset-btn .preset-desc {
    font-size: var(--text-xs);
    color: var(--color-text-light);
}

/* ========== Form errors ========== */
.form-input.error,
.form-select.error {
    border-color: var(--color-danger);
}

.form-input.error:focus,
.form-select.error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.error-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-danger);
    font-size: var(--text-sm);
    margin-top: var(--spacing-xs);
}

.error-message svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* ========== Loading overlay ========== */
.calculating-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
}

.calculating-overlay.active {
    opacity: 1;
    visibility: visible;
}

.calculating-box {
    background-color: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-xl);
}

.calculating-box .loading {
    width: 40px;
    height: 40px;
    margin-bottom: var(--spacing-md);
}

.calculating-box p {
    margin: 0;
    font-size: var(--text-lg);
    color: var(--color-text);
}

/* Flatpickr alt field matches form inputs */
.form-input.flatpickr-input[readonly],
.form-input + input.flatpickr-alt-input {
    background-color: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: var(--text-base);
}

.form-input + input.flatpickr-alt-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}