/* ============================================
   CalcHub - Calculator Component Styles
   Premium White & Blue Brand Design
   ============================================ */

/* Calculator Page Layout */
.calculator-page {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-xl);
    align-items: start;
}

@media (max-width: 1023px) {
    .calculator-page {
        grid-template-columns: 1fr;
    }
}

/* Calculator Container */
.calculator-container {
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--gray-100);
}

.calculator-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--white);
    padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.calculator-header::after {
    content: '';
    position: absolute;
    top: -40%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    pointer-events: none;
}

.calc-header-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-md);
    position: relative;
}

.bookmark-btn {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    border-radius: var(--radius-lg);
    color: var(--white);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.bookmark-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

.bookmark-btn.bookmarked {
    background: rgba(255, 255, 255, 0.3);
    color: #fbbf24;
}

.calculator-header h1 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
    font-size: 1.75rem;
    position: relative;
}

.calculator-header p {
    opacity: 0.9;
    margin: 0;
    position: relative;
    font-size: 0.95rem;
}

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

/* Form Elements */
.calc-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.form-label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.925rem;
}

.form-label .required {
    color: var(--error);
}

.form-hint {
    font-size: 0.825rem;
    color: var(--gray-500);
}

/* Input Styles */
.form-input,
.form-select {
    width: 100%;
    padding: 0.825rem 1rem;
    font-size: 1rem;
    font-family: var(--font-primary);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-lg);
    background: var(--white);
    transition: all var(--transition-fast);
    color: var(--gray-800);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-300);
    box-shadow: 0 0 0 4px var(--primary-100);
}

.form-input:hover,
.form-select:hover {
    border-color: var(--gray-300);
}

.form-input::placeholder {
    color: var(--gray-400);
}

.form-input.error {
    border-color: var(--error);
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

/* Input with unit */
.input-with-unit {
    position: relative;
}

.input-with-unit .form-input {
    padding-right: 4rem;
}

.input-unit {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-500);
    font-weight: 600;
    pointer-events: none;
}

/* Input Group (prefix/suffix) */
.input-group {
    display: flex;
    align-items: stretch;
}

.input-group .form-input {
    border-radius: 0;
    flex: 1;
}

.input-group .form-input:first-child {
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.input-group .form-input:last-child {
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.input-prefix,
.input-suffix {
    display: flex;
    align-items: center;
    padding: 0 1rem;
    background: var(--primary-50);
    border: 1.5px solid var(--gray-200);
    color: var(--primary);
    font-weight: 600;
}

.input-prefix {
    border-right: none;
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.input-suffix {
    border-left: none;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

/* Range Slider */
.form-range {
    width: 100%;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--gray-200);
    outline: none;
    -webkit-appearance: none;
}

.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 3px solid var(--white);
    box-shadow: var(--shadow-blue);
}

.form-range::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 3px solid var(--white);
    box-shadow: var(--shadow-blue);
}

.range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.825rem;
    color: var(--gray-500);
    margin-top: var(--spacing-xs);
}

/* Radio & Checkbox */
.form-radio-group,
.form-checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.form-radio,
.form-checkbox {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.form-radio input,
.form-checkbox input {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.toggle-slider {
    width: 48px;
    height: 26px;
    background: var(--gray-300);
    border-radius: var(--radius-full);
    position: relative;
    transition: background var(--transition-fast);
}

.toggle-slider::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--white);
    border-radius: 50%;
    top: 3px;
    left: 3px;
    transition: transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle-switch input:checked + .toggle-slider::after {
    transform: translateX(22px);
}

/* Calculate Button */
.calc-button {
    width: 100%;
    padding: 1rem 2rem;
    font-size: 1.05rem;
    font-weight: 700;
    font-family: var(--font-primary);
    color: var(--white);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-top: var(--spacing-md);
    box-shadow: var(--shadow-blue);
    letter-spacing: 0.01em;
}

.calc-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue-lg);
}

.calc-button:active {
    transform: translateY(0);
}

.calc-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Results Section */
.calc-results {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 2px solid var(--gray-100);
}

.results-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
}

.result-card {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    text-align: center;
    border: 1px solid var(--gray-100);
}

.result-card.primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--white);
    border: none;
    box-shadow: var(--shadow-blue);
}

.result-card.primary .result-label {
    color: rgba(255, 255, 255, 0.8);
}

.result-label {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.result-value {
    font-size: 1.75rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

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

/* Result Details Table */
.result-details {
    margin-top: var(--spacing-xl);
}

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

.result-table th,
.result-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--gray-100);
}

.result-table th {
    background: var(--primary-50);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9rem;
}

.result-table tr:last-child td {
    border-bottom: none;
}

.result-table .highlight {
    font-weight: 700;
    color: var(--primary);
}

/* Charts Container */
.chart-container {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-100);
}

.chart-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

/* Copy Results Button */
.copy-results {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-family: var(--font-primary);
    color: var(--gray-600);
    background: var(--white);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.copy-results:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-50);
}

.copy-results.copied {
    color: var(--success);
    border-color: var(--success);
    background: #f0fdf4;
}

/* Sidebar */
.calculator-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.sidebar-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
}

.sidebar-title {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-100);
    color: var(--gray-900);
}

.related-calcs {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.related-calc-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0.75rem;
    color: var(--gray-700);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    font-size: 0.9rem;
}

.related-calc-link:hover {
    background: var(--primary-50);
    color: var(--primary);
}

/* Report Bug Button */
.calc-report-bug {
    text-align: right;
    padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-md);
}

.calc-report-bug button {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    color: var(--gray-400);
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    transition: color 0.15s ease;
}

.calc-report-bug button:hover {
    color: var(--primary);
}

/* Bug Report Modal */
.bug-modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.bug-modal-overlay.open {
    display: flex;
}

.bug-modal {
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 480px;
    animation: bugModalIn 0.2s ease;
}

@keyframes bugModalIn {
    from { opacity: 0; transform: translateY(16px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.bug-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) var(--spacing-xl) 0;
}

.bug-modal-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0;
    color: var(--gray-900);
}

.bug-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-400);
    cursor: pointer;
    line-height: 1;
    padding: 0.25rem;
}

.bug-modal-close:hover {
    color: var(--gray-700);
}

.bug-modal-body {
    padding: var(--spacing-lg) var(--spacing-xl) var(--spacing-xl);
}

.bug-form-group {
    margin-bottom: var(--spacing-md);
}

.bug-form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.35rem;
}

.bug-form-group input,
.bug-form-group textarea {
    width: 100%;
    padding: 0.6rem 0.85rem;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.15s;
    box-sizing: border-box;
}

.bug-form-group input:focus,
.bug-form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 110, 245, 0.1);
}

.bug-form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.bug-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.bug-btn-cancel {
    padding: 0.5rem 1rem;
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 0.88rem;
    font-family: inherit;
    color: var(--gray-600);
    cursor: pointer;
    transition: background 0.15s;
}

.bug-btn-cancel:hover {
    background: var(--gray-200);
}

.bug-btn-submit {
    padding: 0.5rem 1.25rem;
    background: var(--primary);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 0.88rem;
    font-family: inherit;
    color: var(--white);
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}

.bug-btn-submit:hover {
    background: var(--primary-600, #1557c0);
}

.bug-btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.bug-status {
    margin-top: var(--spacing-sm);
    font-size: 0.85rem;
    text-align: center;
}

.bug-status.success {
    color: #16a34a;
}

.bug-status.error {
    color: #dc2626;
}

/* Content Sections */
.calc-content {
    margin-top: var(--spacing-2xl);
}

.content-section {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
}

.content-section h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-100);
}

.content-section h3 {
    font-size: 1.25rem;
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.content-section p {
    color: var(--gray-600);
    line-height: 1.8;
}

.content-section ul,
.content-section ol {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
    color: var(--gray-600);
}

.content-section li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

/* Formula Display */
.formula-box {
    background: var(--secondary);
    color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    margin: var(--spacing-lg) 0;
    font-family: var(--font-mono);
    overflow-x: auto;
    border: 1px solid var(--secondary-light);
}

.formula-box code {
    font-size: 1.125rem;
    background: transparent;
    color: var(--accent-light);
    padding: 0;
}

/* Example Box */
.example-box {
    background: var(--primary-50);
    border-left: 4px solid var(--primary);
    padding: var(--spacing-lg);
    border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
    margin: var(--spacing-lg) 0;
}

.example-box h4 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

/* FAQ Section */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.faq-item {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.faq-item:hover {
    border-color: var(--primary-200);
}

.faq-item.open {
    border-color: var(--primary-300);
    box-shadow: 0 0 0 3px var(--primary-100);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 0.975rem;
    font-weight: 600;
    font-family: var(--font-primary);
    text-align: left;
    background: var(--white);
    border: none;
    cursor: pointer;
    transition: background var(--transition-fast);
    color: var(--gray-800);
}

.faq-question:hover {
    background: var(--primary-50);
}

.faq-question svg {
    flex-shrink: 0;
    transition: transform var(--transition-fast);
    color: var(--primary);
}

.faq-item.open .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg);
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.faq-item.open .faq-answer {
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
    max-height: 500px;
}

.faq-answer p {
    margin: 0;
}

/* Breadcrumbs */
.breadcrumbs {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
    font-size: 0.875rem;
    color: var(--gray-500);
}

.breadcrumbs a {
    color: var(--gray-500);
    transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
    color: var(--primary);
}

.breadcrumbs .separator {
    color: var(--gray-300);
}

.breadcrumbs .current {
    color: var(--primary);
    font-weight: 600;
}

/* Loading State */
.calc-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--primary-100);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Print Styles */
@media print {
    .calculator-sidebar,
    .calc-button,
    .copy-results,
    .breadcrumbs {
        display: none !important;
    }

    .calculator-page {
        grid-template-columns: 1fr;
    }

    .calculator-container {
        box-shadow: none;
        border: 1px solid #ddd;
    }

    .calc-results {
        break-inside: avoid;
    }
}

/* ============================================
   Category Page — Calculator Listing
   ============================================ */
.category-description {
    font-size: 1.05rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.category-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
}

.category-grid .category-card {
    display: flex !important;
    flex-direction: row !important;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    text-decoration: none;
    border-radius: var(--radius-xl);
    background: var(--white);
    border: 1px solid var(--gray-100);
    box-shadow: var(--shadow-sm);
    transition: all 0.15s ease;
}

.category-grid .category-card::before {
    display: none !important;
}

.category-grid .category-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-100);
}

.category-card-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    max-width: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 700;
    flex-shrink: 0;
}

.category-card-content {
    flex: 1;
    min-width: 0;
}

.category-card-content h2 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-900);
    margin: 0 0 0.2rem;
}

.category-card-content p {
    font-size: 0.88rem;
    color: var(--gray-500);
    margin: 0;
    line-height: 1.5;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.category-card-arrow {
    color: var(--gray-300);
    flex-shrink: 0;
    transition: color 0.15s ease;
}

.category-grid .category-card:hover .category-card-arrow {
    color: var(--primary);
}

/* Cross-links to other categories */
.category-cross-links {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.cross-link-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
    text-decoration: none;
    transition: all 0.15s ease;
}

.cross-link-card:hover {
    background: var(--white);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-100);
}

.cross-link-icon {
    font-size: 1.4rem;
    font-weight: 700;
    width: 36px;
    text-align: center;
}

.cross-link-card strong {
    display: block;
    font-size: 0.92rem;
    color: var(--gray-800);
}

.cross-link-card small {
    font-size: 0.8rem;
    color: var(--gray-400);
}

/* Time Calculator - Dynamic Rows */
.time-row {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    background: var(--gray-50);
}

.time-row + .time-row,
.time-row + .form-group,
.form-group + .time-row {
    margin-top: var(--spacing-md);
}

.time-row-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.time-row-label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.925rem;
}

.time-row-remove {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--gray-400);
    cursor: pointer;
    padding: 0 4px;
}

.time-row-remove:hover {
    color: var(--error);
}

.time-op-divider {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-600);
    padding: var(--spacing-xs) 0;
}

.calc-button-secondary {
    display: block;
    width: 100%;
    background: var(--white);
    color: var(--primary-600);
    border: 1.5px dashed var(--primary-300);
    padding: 0.7rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-weight: 600;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    margin-top: var(--spacing-sm);
}

.calc-button-secondary:hover {
    background: var(--primary-50);
    border-color: var(--primary-400);
}

.time-now-btn {
    font-size: 0.75rem;
    padding: 2px 8px;
    margin-left: 8px;
    background: var(--primary-50);
    border: 1px solid var(--primary-200);
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--primary-600);
    font-family: var(--font-primary);
}

.time-now-btn:hover {
    background: var(--primary-100);
}

/* Expandable Sections */
.expand-section {
    display: none;
    margin-top: var(--spacing-md);
}

.expand-section.open {
    display: block;
}

/* Pie Chart */
.mortgage-chart {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
    justify-content: center;
    margin: var(--spacing-md) 0;
}

.pie-chart {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    flex-shrink: 0;
}

.pie-legend {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.pie-legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
}

.pie-legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* Amortization Schedule */
.amortization-toggle {
    margin-top: var(--spacing-lg);
}

.amortization-section {
    display: none;
    margin-top: var(--spacing-md);
    max-height: 500px;
    overflow-y: auto;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
}

.amortization-section.open {
    display: block;
}

.amortization-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.amortization-table th {
    position: sticky;
    top: 0;
    background: var(--primary-50);
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--gray-700);
}

.amortization-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--gray-100);
}

/* Compound Interest - Stacked Bar Chart */
.bar-chart {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: var(--spacing-lg);
}

.bar-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.bar-label {
    width: 42px;
    font-size: 0.8rem;
    color: var(--gray-500);
    text-align: right;
    flex-shrink: 0;
}

.bar-track {
    flex: 1;
    display: flex;
    height: 22px;
    border-radius: 4px;
    overflow: hidden;
    background: var(--gray-100);
}

.bar-segment {
    height: 100%;
    min-width: 1px;
}

.bar-value {
    width: 90px;
    font-size: 0.8rem;
    color: var(--gray-600);
    text-align: right;
    flex-shrink: 0;
}

/* Chart container (shared for compound interest) */
.ci-chart {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

/* Assignment entry rows (Grade Calculator) */
.assignment-row {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 8px;
}
.assignment-row input {
    flex: 1;
    min-width: 0;
}
.assignment-row .remove-btn {
    cursor: pointer;
    color: #ef4444;
    font-size: 1.3rem;
    padding: 4px 8px;
    line-height: 1;
    border: none;
    background: none;
    flex-shrink: 0;
}
.assignment-row .remove-btn:hover {
    color: #dc2626;
}
.assignment-weight-total {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-top: 4px;
    padding: 4px 0;
}
.add-assignment-btn {
    border: 1px dashed var(--gray-300);
    background: transparent;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
    color: var(--gray-500);
    margin-top: 8px;
    font-size: 0.9rem;
    transition: all 0.2s;
}
.add-assignment-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-50);
}

/* Grade status banner */
.grade-status {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 8px;
    font-weight: 600;
    text-align: center;
    font-size: 0.95rem;
}
.grade-status.green {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}
.grade-status.amber {
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fde68a;
}
.grade-status.red {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* Grade range bar */
.grade-range-bar {
    position: relative;
    height: 32px;
    border-radius: 6px;
    overflow: visible;
    margin-bottom: 16px;
    background: var(--gray-100);
}
.grade-range-marker {
    position: absolute;
    top: -4px;
    width: 3px;
    height: 40px;
    border-radius: 2px;
    z-index: 1;
}
.grade-range-label {
    position: absolute;
    top: -20px;
    font-size: 0.7rem;
    font-weight: 600;
    transform: translateX(-50%);
    left: 50%;
    white-space: nowrap;
}

/* Scenario table highlight */
.scenario-target {
    background: #eff6ff !important;
    font-weight: 600;
}

@media (max-width: 600px) {
    .assignment-row {
        flex-wrap: wrap;
    }
    .assignment-row input[type="text"] {
        flex: 1 1 100%;
    }
}

/* GPA Calculator — course rows */
.gpa-course-row {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 8px;
}
.gpa-course-row .remove-btn {
    cursor: pointer;
    color: #ef4444;
    font-size: 1.3rem;
    padding: 4px 8px;
    line-height: 1;
    flex-shrink: 0;
}
.gpa-course-row .remove-btn:hover {
    color: #dc2626;
}
.gpa-course-header {
    display: flex;
    gap: 8px;
    margin-bottom: 6px;
    font-size: 0.8rem;
    color: var(--gray-500);
    font-weight: 600;
    padding-right: 36px;
}

/* GPA scale bar */
.gpa-scale-bar {
    position: relative;
    height: 32px;
    border-radius: 6px;
    overflow: visible;
    margin-bottom: 16px;
}
.gpa-scale-marker {
    position: absolute;
    top: -4px;
    width: 3px;
    height: 40px;
    border-radius: 2px;
    z-index: 1;
}
.gpa-scale-label {
    position: absolute;
    top: -20px;
    font-size: 0.7rem;
    font-weight: 600;
    transform: translateX(-50%);
    left: 50%;
    white-space: nowrap;
}

/* Goal planner result */
.goal-result {
    padding: 12px 16px;
    border-radius: 8px;
    margin-top: 8px;
    font-weight: 600;
    text-align: center;
    font-size: 0.95rem;
}
.goal-result.green {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}
.goal-result.amber {
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fde68a;
}
.goal-result.red {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

@media (max-width: 600px) {
    .gpa-course-row {
        flex-wrap: wrap;
    }
    .gpa-course-row input[type="text"] {
        flex: 1 1 100%;
    }
    .gpa-course-header {
        display: none;
    }
}

/* ============================================
   Body Fat Calculator Styles
   ============================================ */

/* Body fat category bar */
.bf-category-bar {
    position: relative;
    height: 32px;
    border-radius: 6px;
    overflow: visible;
    margin-bottom: 4px;
    display: flex;
}
.bf-segment {
    height: 100%;
}
.bf-segment:first-child {
    border-radius: 6px 0 0 6px;
}
.bf-segment:last-child {
    border-radius: 0 6px 6px 0;
}
.bf-marker {
    position: absolute;
    top: -4px;
    width: 3px;
    height: 40px;
    background: #111;
    border-radius: 2px;
    z-index: 2;
}
.bf-marker-label {
    position: absolute;
    top: -20px;
    font-size: 0.7rem;
    font-weight: 600;
    transform: translateX(-50%);
    left: 50%;
    white-space: nowrap;
    color: #111;
}
.bf-zone-labels {
    display: flex;
    font-size: 0.7rem;
    color: var(--gray-500);
    margin-top: 2px;
    margin-bottom: 8px;
}

/* Body fat ideal comparison */
.bf-ideal-result {
    padding: 12px 16px;
    border-radius: 8px;
    margin-top: 8px;
    margin-bottom: 8px;
    font-weight: 600;
    text-align: center;
}
.bf-ideal-result.green {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}
.bf-ideal-result.amber {
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fde68a;
}
.bf-ideal-result.red {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* Investment stacked growth bars */
.inv-growth-chart { margin: 12px 0; }
.inv-growth-bar { display: flex; height: 24px; border-radius: 4px; overflow: hidden; margin-bottom: 4px; }
.inv-growth-bar .inv-contrib { background: #1a6ef5; transition: width 0.3s ease; }
.inv-growth-bar .inv-interest { background: #10b981; transition: width 0.3s ease; }
.inv-growth-label { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--gray-500); margin-bottom: 2px; }
.inv-growth-legend { display: flex; gap: 16px; font-size: 0.8rem; margin-top: 8px; }
.inv-growth-legend span { display: inline-flex; align-items: center; gap: 4px; }
.inv-growth-legend .dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }

/* Volume converter swap button */
.vol-swap-btn { display: flex; justify-content: center; margin: -4px 0 8px; }
.vol-swap-btn button { background: var(--primary-50); border: 1px solid var(--gray-200); border-radius: 50%; width: 36px; height: 36px; cursor: pointer; font-size: 1.1rem; color: var(--primary); transition: background 0.2s; line-height: 1; }
.vol-swap-btn button:hover { background: var(--primary); color: white; }

/* Volume preset buttons */
.vol-presets { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.vol-presets button { background: var(--gray-100); border: 1px solid var(--gray-200); border-radius: var(--radius-lg); padding: 4px 10px; font-size: 0.78rem; cursor: pointer; white-space: nowrap; transition: background 0.2s; }
.vol-presets button:hover { background: var(--primary-50); border-color: var(--primary); color: var(--primary); }

/* Volume category table headers */
.vol-cat-header td { background: var(--gray-100); font-weight: 600; font-size: 0.85rem; color: var(--gray-600); letter-spacing: 0.02em; }