/* ============================================
   হিসাব (Hisab) - Calculator UI Styles
   Version: 1.0.0
   Last Updated: 2026-05-04
   
   ক্যালকুলেটর ফর্ম, ইনপুট, রেজাল্ট কার্ড,
   চার্ট, কম্পেয়ার টেবিল — সবকিছুর স্টাইল।
   ============================================ */

/* --------------------------------------------
   1. CALCULATOR PAGE LAYOUT
   -------------------------------------------- */
.calculator-page {
    padding-top: calc(var(--nav-height) + var(--space-6));
    padding-bottom: var(--space-12);
    min-height: 100vh;
}

.calculator-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
    max-width: var(--container-max);
    margin: 0 auto;
}

/* ২-কলাম লেআউট (Desktop) */
@media (min-width: 1024px) {
    .calculator-layout {
        grid-template-columns: 1fr 380px;
        align-items: start;
    }
    
    .calculator-layout.single-column {
        grid-template-columns: minmax(0, 800px);
        justify-content: center;
    }
}

/* --------------------------------------------
   2. CALCULATOR CARD (Input Form)
   -------------------------------------------- */
.calculator-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: box-shadow var(--transition-normal);
}

.calculator-card:hover {
    box-shadow: var(--shadow-lg);
}

.calculator-card-header {
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--color-border);
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-surface));
}

.calculator-card-header h1 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-1);
    color: var(--color-text-primary);
}

.calculator-card-header .subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

.calculator-card-body {
    padding: var(--space-6);
}

/* --------------------------------------------
   3. FORM ELEMENTS
   -------------------------------------------- */
.calculator-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

@media (min-width: 576px) {
    .form-row {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-row.single-col {
        grid-template-columns: 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.form-label .label-icon {
    font-size: var(--font-size-base);
}

.form-label .required {
    color: var(--color-danger);
    margin-left: 2px;
}

.form-label .info-tip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: var(--radius-full);
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 11px;
    cursor: help;
    font-weight: var(--font-weight-bold);
}

/* Input with Icon */
.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group .input-icon {
    position: absolute;
    left: 14px;
    font-size: var(--font-size-lg);
    pointer-events: none;
    z-index: 1;
}

.input-group .form-input {
    padding-left: 42px;
}

.input-group .input-suffix {
    position: absolute;
    right: 14px;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    pointer-events: none;
}

/* Taka Input */
.input-taka .form-input {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    padding: 14px 14px 14px 50px;
    text-align: right;
    letter-spacing: 0.5px;
}

.input-taka .input-icon {
    font-size: var(--font-size-2xl);
    color: var(--color-success);
}

/* Select Styling */
.form-select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
    cursor: pointer;
}

.form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* Toggle / Switch */
.toggle-group {
    display: flex;
    background: var(--color-divider);
    border-radius: var(--radius-md);
    padding: 4px;
    gap: 4px;
}

.toggle-option {
    flex: 1;
}

.toggle-option input {
    display: none;
}

.toggle-option label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    text-align: center;
    white-space: nowrap;
    user-select: none;
}

.toggle-option input:checked + label {
    background: var(--color-surface);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

/* Error Message */
.error-message {
    display: none;
    font-size: var(--font-size-xs);
    color: var(--color-danger);
    margin-top: var(--space-1);
    align-items: center;
    gap: 4px;
}

.error-message.visible {
    display: flex;
}

.error-message::before {
    content: '⚠️';
    font-size: 12px;
}

/* Input Error State */
.form-input.error,
.form-select.error {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px var(--color-danger-light);
}

/* --------------------------------------------
   4. CALCULATE BUTTON
   -------------------------------------------- */
.btn-calculate {
    width: 100%;
    padding: 16px 24px;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #ffffff;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    position: relative;
    overflow: hidden;
}

.btn-calculate::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-calculate:hover::before {
    width: 500px;
    height: 500px;
}

.btn-calculate:hover {
    background: linear-gradient(135deg, var(--color-primary-hover), var(--color-primary));
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(26, 61, 228, 0.35);
}

.btn-calculate:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(26, 61, 228, 0.25);
}

.btn-calculate:disabled {
    background: var(--color-text-muted);
    cursor: not-allowed;
    transform: none;
}

.btn-calculate .spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* Secondary Actions */
.form-actions {
    display: flex;
    gap: var(--space-3);
}

.btn-reset {
    flex: 1;
    padding: 12px 16px;
    background: var(--color-divider);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
}

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

/* --------------------------------------------
   5. RESULT SECTION
   -------------------------------------------- */
.calculator-result {
    display: none;
    animation: fadeInUp 0.4s ease forwards;
}

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

.calculator-result .result-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.calculator-result .result-header {
    padding: var(--space-4) var(--space-6);
    background: linear-gradient(135deg, var(--color-success-light), var(--color-surface));
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.calculator-result .result-header h3 {
    margin-bottom: 0;
    font-size: var(--font-size-lg);
    color: var(--color-success);
}

.result-actions {
    display: flex;
    gap: var(--space-2);
}

.result-action-btn {
    padding: 6px 10px;
    font-size: var(--font-size-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--color-text-secondary);
}

.result-action-btn:hover {
    background: var(--color-divider);
    color: var(--color-text-primary);
}

/* Main Result Value */
.result-hero {
    padding: var(--space-6);
    text-align: center;
    border-bottom: 1px solid var(--color-divider);
}

.result-hero-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.result-hero-value {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-success);
    line-height: 1.2;
    word-break: break-all;
}

.result-hero-sub {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-2);
}

/* Result Details Grid */
.result-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
}

.result-detail-item {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-divider);
    border-right: 1px solid var(--color-divider);
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.result-detail-item:nth-child(even) {
    border-right: none;
}

.result-detail-item:nth-last-child(-n+2) {
    border-bottom: none;
}

.result-detail-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-detail-value {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.result-detail-value.positive {
    color: var(--color-success);
}

.result-detail-value.negative {
    color: var(--color-danger);
}

/* --------------------------------------------
   6. RESULT TABLE (Yearly Breakdown)
   -------------------------------------------- */
.result-table-wrapper {
    margin-top: var(--space-6);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.result-table-header {
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--color-border);
}

.result-table-header h4 {
    margin-bottom: 0;
    font-size: var(--font-size-base);
}

.result-table {
    width: 100%;
    border-collapse: collapse;
}

.result-table th {
    background: var(--color-divider);
    padding: 10px 14px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-align: right;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.result-table th:first-child {
    text-align: center;
}

.result-table td {
    padding: 10px 14px;
    font-size: var(--font-size-sm);
    text-align: right;
    border-bottom: 1px solid var(--color-divider);
    color: var(--color-text-primary);
}

.result-table td:first-child {
    text-align: center;
    font-weight: var(--font-weight-medium);
}

.result-table tr:last-child td {
    border-bottom: none;
    background: var(--color-success-light);
    font-weight: var(--font-weight-semibold);
}

.result-table tr:hover td {
    background: var(--color-divider);
}

.result-table tr:last-child:hover td {
    background: var(--color-success-light);
}

/* --------------------------------------------
   7. SIDEBAR (Desktop)
   -------------------------------------------- */
.calculator-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

/* Rate Info Card */
.rate-info-card {
    background: var(--color-primary-light);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
}

.rate-info-card h4 {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.rate-info-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.rate-info-list li {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    padding: var(--space-2) var(--space-3);
    background: var(--color-surface);
    border-radius: var(--radius-sm);
}

.rate-info-list .rate-value {
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
}

/* Related Calculators */
.sidebar-related {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
}

.sidebar-related h4 {
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-3);
    color: var(--color-text-secondary);
}

.sidebar-related-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.sidebar-related-links a {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.sidebar-related-links a:hover {
    background: var(--color-divider);
    color: var(--color-primary);
}

/* --------------------------------------------
   8. COMPARE SECTION
   -------------------------------------------- */
.compare-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

@media (min-width: 768px) {
    .compare-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .compare-cards.compare-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

.compare-card {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.compare-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.compare-card.active {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.compare-card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-3);
}

.compare-card-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-2);
}

.compare-card-rate {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.compare-card-detail {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

/* Compare Winner Badge */
.compare-winner {
    position: relative;
    border-color: var(--color-success) !important;
    background: var(--color-success-light) !important;
}

.compare-winner::before {
    content: '🏆 সেরা';
    position: absolute;
    top: -12px;
    right: -12px;
    background: var(--color-success);
    color: #ffffff;
    font-size: 11px;
    font-weight: var(--font-weight-bold);
    padding: 4px 12px;
    border-radius: var(--radius-full);
}

/* --------------------------------------------
   9. CHARTS (Simple CSS Bars)
   -------------------------------------------- */
.result-chart {
    margin-top: var(--space-6);
}

.chart-bar-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.chart-bar-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.chart-bar-label {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.chart-bar {
    height: 24px;
    background: var(--color-divider);
    border-radius: var(--radius-sm);
    overflow: hidden;
    position: relative;
}

.chart-bar-fill {
    height: 100%;
    border-radius: var(--radius-sm);
    transition: width 0.6s ease;
    position: absolute;
    left: 0;
    top: 0;
}

.chart-bar-fill.primary {
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-hover));
}

.chart-bar-fill.success {
    background: linear-gradient(90deg, var(--color-success), #059669);
}

.chart-bar-fill.warning {
    background: linear-gradient(90deg, var(--color-warning), #d97706);
}

.chart-bar-fill.danger {
    background: linear-gradient(90deg, var(--color-danger), #b91c1c);
}

/* --------------------------------------------
   10. FAQ SECTION (Calculator Page)
   -------------------------------------------- */
.calculator-faq {
    margin-top: var(--space-10);
}

.faq-heading {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-6);
    text-align: center;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: var(--space-4) var(--space-5);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
}

.faq-question:hover {
    background: var(--color-divider);
}

.faq-question .faq-icon {
    transition: transform var(--transition-normal);
    font-size: 12px;
}

.faq-item.open .faq-question .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    display: none;
    padding: 0 var(--space-5) var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

.faq-item.open .faq-answer {
    display: block;
}

/* --------------------------------------------
   11. TOAST MESSAGE
   -------------------------------------------- */
.toast-message {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-text-primary);
    color: var(--color-surface);
    padding: 12px 24px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    z-index: var(--z-toast);
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-normal);
    white-space: nowrap;
}

.toast-message.visible {
    transform: translateX(-50%) translateY(0);
}

/* --------------------------------------------
   12. VALUE UPDATED ANIMATION
   -------------------------------------------- */
.value-updated {
    animation: valueFlash 0.5s ease;
}

@keyframes valueFlash {
    0% { transform: scale(1); }
    25% { transform: scale(1.08); color: var(--color-primary); }
    50% { transform: scale(1); }
    75% { transform: scale(1.04); }
    100% { transform: scale(1); }
}

/* --------------------------------------------
   13. LOADING STATE
   -------------------------------------------- */
.calculator-form.loading {
    opacity: 0.7;
    pointer-events: none;
}

.calculator-result.loading {
    opacity: 0.6;
}

/* Skeleton inside result */
.result-skeleton {
    height: 200px;
    background: linear-gradient(90deg, var(--color-divider) 25%, var(--color-border) 50%, var(--color-divider) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-lg);
}

/* --------------------------------------------
   14. RESPONSIVE ADJUSTMENTS
   -------------------------------------------- */
@media (max-width: 767px) {
    .calculator-card-header {
        padding: var(--space-4);
    }
    
    .calculator-card-header h1 {
        font-size: var(--font-size-xl);
    }
    
    .calculator-card-body {
        padding: var(--space-4);
    }
    
    .result-hero-value {
        font-size: var(--font-size-3xl);
    }
    
    .result-details {
        grid-template-columns: 1fr;
    }
    
    .result-detail-item {
        border-right: none;
    }
    
    .result-detail-item:nth-last-child(-n+2) {
        border-bottom: 1px solid var(--color-divider);
    }
    
    .result-detail-item:last-child {
        border-bottom: none;
    }
    
    .result-table {
        font-size: var(--font-size-xs);
    }
    
    .result-table th,
    .result-table td {
        padding: 8px 6px;
    }
    
    .btn-calculate {
        padding: 14px 20px;
        font-size: var(--font-size-base);
    }
}

/* --------------------------------------------
   15. DARK MODE OVERRIDES
   -------------------------------------------- */
[data-theme="dark"] .calculator-card-header {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-surface));
}

[data-theme="dark"] .result-header {
    background: linear-gradient(135deg, var(--color-success-light), var(--color-surface));
}

[data-theme="dark"] .rate-info-card {
    background: var(--color-primary-light);
}

[data-theme="dark"] .compare-card.active {
    background: var(--color-primary-light);
}

[data-theme="dark"] .compare-winner {
    background: var(--color-success-light) !important;
}

[data-theme="dark"] .result-table tr:last-child td {
    background: var(--color-success-light);
}

/* --------------------------------------------
   CALCULATOR CSS LOADED SUCCESSFULLY
   -------------------------------------------- */