/* Alaska Tax Calculator 2025 - Alaska-themed Styling */

/* CSS Variables for Alaska Theme */
:root {
    /* Alaska-Inspired Colors */
    --primary-color: #204080;
    --primary-dark: #0056CC;
    --primary-light: #E3F2FD;
    
    /* Alaska Nature Colors */
    --alaska-blue: #1E3A8A;
    --glacier-blue: #3B82F6;
    --aurora-green: #10B981;
    --midnight-sun: #F59E0B;
    --snow-white: #FAFAFA;
    
    /* Semantic Colors */
    --success-color: #059669;
    --warning-color: #D97706;
    --error-color: #DC2626;
    --info-color: --glacier-blue;
    
    /* Neutral Colors */
    --text-primary: #1F2937;
    --text-secondary: #4B5563;
    --text-light: #6B7280;
    --background-primary: #ffffff;
    --background-secondary: #F9FAFB;
    --border-color: #D1D5DB;
    --border-light: #E5E7EB;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-out;
    --transition-base: 200ms ease-out;
    --transition-slow: 300ms ease-out;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-secondary);
    font-size: var(--font-size-base);
}

/* Container and Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Hero Section with Alaska Inspiration */
.hero-section {
    background: linear-gradient(135deg, var(--alaska-blue) 0%, var(--glacier-blue) 50%, var(--primary-color) 100%);
    color: white;
    padding: var(--spacing-2xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="snowflake" width="20" height="20" patternUnits="userSpaceOnUse"><path d="M10,1 L10,19 M1,10 L19,10 M4,4 L16,16 M16,4 L4,16" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23snowflake)"/></svg>');
    opacity: 0.3;
}

.hero-section .container {
    position: relative;
    z-index: 1;
}

.hero-section h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-section p {
    font-size: var(--font-size-lg);
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Calculator Section */
.calculator-section {
    padding: var(--spacing-2xl) 0;
}

.calculator-card {
    background: var(--background-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
}

.calculator-card h2 {
    background: linear-gradient(135deg, var(--alaska-blue) 0%, var(--glacier-blue) 100%);
    color: white;
    padding: var(--spacing-xl);
    margin: 0;
    font-size: var(--font-size-2xl);
    font-weight: 600;
    text-align: center;
}

/* Form Styles */
#alaskaTaxForm {
    padding: var(--spacing-xl);
}

.section-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--primary-light);
}

.section-header h3 {
    color: var(--alaska-blue);
    font-size: var(--font-size-xl);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

.input-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.input-label.required::after {
    content: '*';
    color: var(--error-color);
    font-weight: bold;
}

.input-field,
.select-field {
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: var(--transition-base);
    background: var(--background-primary);
    color: var(--text-primary);
}

.input-field:focus,
.select-field:focus {
    outline: none;
    border-color: var(--alaska-blue);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
    transform: translateY(-1px);
}

.input-field:hover,
.select-field:hover {
    border-color: var(--glacier-blue);
}

.input-field.error,
.select-field.error {
    border-color: var(--error-color);
    background-color: rgba(220, 38, 38, 0.05);
}

.help-text {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    line-height: 1.4;
    margin-top: var(--spacing-xs);
}

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

.error-message::before {
    content: '⚠';
    font-weight: bold;
}

/* Deductions and Alaska-Specific Sections */
.deductions-section,
.alaska-section {
    background: var(--snow-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-light);
}

.alaska-section {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.05) 0%, rgba(59, 130, 246, 0.02) 100%);
    border-left: 4px solid var(--alaska-blue);
}

/* Radio and Checkbox Styles */
.deduction-choice {
    margin-bottom: var(--spacing-lg);
}

.radio-group,
.checkbox-group {
    margin-bottom: var(--spacing-md);
}

.radio-label,
.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    line-height: 1.5;
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
}

.radio-label:hover,
.checkbox-label:hover {
    background-color: var(--primary-light);
}

.radio-label input[type="radio"],
.checkbox-label input[type="checkbox"] {
    display: none;
}

.radio-mark,
.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
    flex-shrink: 0;
    margin-top: 2px;
}

.radio-mark {
    border-radius: 50%;
}

.radio-label input[type="radio"]:checked + .radio-mark,
.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background-color: var(--alaska-blue);
    border-color: var(--alaska-blue);
    color: white;
}

.radio-label input[type="radio"]:checked + .radio-mark::after {
    content: '●';
    font-size: 10px;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    font-size: 12px;
    font-weight: bold;
}

/* Itemized Deductions Section */
.itemized-section {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--background-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
}

/* Calculate Button */
.calculate-btn {
    background: linear-gradient(135deg, var(--alaska-blue) 0%, var(--glacier-blue) 100%);
    color: white;
    padding: var(--spacing-lg) var(--spacing-2xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: var(--shadow-md);
    width: 100%;
    max-width: 400px;
    margin: var(--spacing-xl) auto 0;
    display: block;
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.calculate-btn:active {
    transform: translateY(0);
}

.calculate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Results Section */
.results-section {
    display: none;
    margin-top: var(--spacing-xl);
    background: var(--background-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.results-section.show {
    display: block;
    animation: slideInUp 0.5s ease-out;
}

.results-section h3 {
    background: linear-gradient(135deg, var(--success-color) 0%, var(--aurora-green) 100%);
    color: white;
    padding: var(--spacing-xl);
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: 600;
    text-align: center;
}

#resultsContent {
    padding: var(--spacing-xl);
}

/* Information Section */
.info-section {
    background: var(--background-primary);
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border-light);
}

.info-section h2 {
    color: var(--alaska-blue);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    font-size: var(--font-size-2xl);
}

.info-section h3 {
    color: var(--alaska-blue);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xl);
}

/* Alaska Advantages */
.alaska-advantages {
    margin-bottom: var(--spacing-2xl);
}

.advantage-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.advantage-card {
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-light);
    transition: var(--transition-base);
}

.advantage-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.advantage-card.no-income-tax {
    border-top: 4px solid var(--success-color);
}

.advantage-card.pfd-benefit {
    border-top: 4px solid var(--midnight-sun);
}

.advantage-card.low-sales-tax {
    border-top: 4px solid var(--glacier-blue);
}

.advantage-card.property-tax {
    border-top: 4px solid var(--aurora-green);
}

.advantage-card h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.advantage-card ul {
    list-style: none;
    padding: 0;
}

.advantage-card li {
    padding: var(--spacing-xs) 0;
    font-size: var(--font-size-sm);
    line-height: 1.5;
    position: relative;
    padding-left: var(--spacing-lg);
}

.advantage-card li::before {
    content: '❄';
    position: absolute;
    left: 0;
    color: var(--glacier-blue);
}

/* Federal Tax Info */
.federal-tax-info {
    display: grid;
    gap: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.tax-info-card {
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border-left: 4px solid var(--alaska-blue);
}

.tax-info-card h4 {
    color: var(--alaska-blue);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.tax-brackets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.bracket-info {
    background: var(--background-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
}

.bracket-info strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: var(--spacing-sm);
}

.bracket-info ul {
    list-style: none;
    padding: 0;
}

.bracket-info li {
    padding: var(--spacing-xs) 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Tax Comparison */
.tax-comparison {
    margin: var(--spacing-xl) 0;
}

.comparison-table {
    background: var(--background-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-top: var(--spacing-md);
}

.comparison-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
    align-items: center;
}

.comparison-row.header {
    background: var(--alaska-blue);
    color: white;
    font-weight: 600;
}

.comparison-row:last-child {
    border-bottom: none;
}

.comparison-row:nth-child(even):not(.header) {
    background: var(--background-secondary);
}

/* Alaska Specifics */
.alaska-specifics {
    margin: var(--spacing-xl) 0;
}

.specifics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.specific-card {
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-light);
    transition: var(--transition-base);
}

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

.specific-card h4 {
    color: var(--alaska-blue);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.specific-card ul {
    list-style: none;
    padding: 0;
}

.specific-card li {
    padding: var(--spacing-xs) 0;
    font-size: var(--font-size-sm);
    line-height: 1.5;
    position: relative;
    padding-left: var(--spacing-lg);
}

.specific-card li::before {
    content: '🏔️';
    position: absolute;
    left: 0;
}

/* Calculator Guidance */
.calculator-guidance {
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.calculator-guidance h3 {
    color: var(--alaska-blue);
    margin-bottom: var(--spacing-lg);
}

.guidance-content ul {
    list-style: none;
    padding: 0;
}

.guidance-content li {
    padding: var(--spacing-sm) 0;
    position: relative;
    padding-left: var(--spacing-lg);
    line-height: 1.6;
}

.guidance-content li::before {
    content: '💡';
    position: absolute;
    left: 0;
}

.important-note {
    background: var(--warning-color);
    color: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.important-note h4 {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

/* Related Calculators */
.related-calculators {
    background: var(--background-secondary);
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border-light);
}

.related-calculators h2 {
    text-align: center;
    color: var(--alaska-blue);
    margin-bottom: var(--spacing-2xl);
    font-size: var(--font-size-2xl);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.related-card {
    background: var(--background-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-decoration: none;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    color: var(--text-primary);
}

.related-card h3 {
    color: var(--alaska-blue);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.related-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-sm);
}

/* FAQ Section */
.faq-section {
    background: var(--background-primary);
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border-light);
}

.faq-section h2 {
    text-align: center;
    color: var(--alaska-blue);
    margin-bottom: var(--spacing-2xl);
    font-size: var(--font-size-2xl);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    background: var(--background-primary);
}

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

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

.faq-question[aria-expanded="true"] {
    background: var(--primary-light);
    color: var(--alaska-blue);
}

.faq-icon {
    font-size: var(--font-size-xl);
    font-weight: bold;
    color: var(--alaska-blue);
    transition: var(--transition-base);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    display: none;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.6;
    border-top: 1px solid var(--border-light);
    background: var(--background-secondary);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--background-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease-out;
}

.modal-header {
    background: linear-gradient(135deg, var(--alaska-blue) 0%, var(--glacier-blue) 100%);
    color: white;
    padding: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
}

.modal-close {
    background: none;
    border: none;
    color: white;
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

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

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
    text-align: right;
}

.modal-button {
    background: var(--alaska-blue);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-base);
}

.modal-button:hover {
    background: var(--glacier-blue);
}

/* Animations */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-section {
        padding: var(--spacing-xl) 0;
    }
    
    .hero-section h1 {
        font-size: var(--font-size-2xl);
    }
    
    .hero-section p {
        font-size: var(--font-size-base);
    }
    
    .calculator-section {
        padding: var(--spacing-xl) 0;
    }
    
    #alaskaTaxForm {
        padding: var(--spacing-lg);
    }
    
    .form-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .advantage-cards,
    .specifics-grid {
        grid-template-columns: 1fr;
    }
    
    .tax-brackets {
        grid-template-columns: 1fr;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
        text-align: center;
    }
    
    .modal-content {
        margin: var(--spacing-md);
        width: calc(100% - 2rem);
    }
}

@media (max-width: 480px) {
    .hero-section h1 {
        font-size: var(--font-size-xl);
    }
    
    .calculator-card h2 {
        font-size: var(--font-size-xl);
        padding: var(--spacing-lg);
    }
    
    #alaskaTaxForm {
        padding: var(--spacing-md);
    }
    
    .calculate-btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-base);
    }
    
    .faq-question {
        padding: var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    .faq-answer {
        padding: 0 var(--spacing-md) var(--spacing-md);
    }
}

/* Print Styles */
@media print {
    .hero-section,
    .related-calculators,
    .faq-section {
        display: none;
    }
    
    .calculator-section {
        padding: 0;
    }
    
    .calculator-card {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
    
    .results-section {
        display: block !important;
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --alaska-blue: #000080;
        --glacier-blue: #0066CC;
        --text-primary: #000000;
        --text-secondary: #333333;
        --border-color: #666666;
        --background-primary: #FFFFFF;
        --background-secondary: #F5F5F5;
    }
}

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

/* Focus Styles for Better Accessibility */
.input-field:focus-visible,
.select-field:focus-visible,
.calculate-btn:focus-visible,
.faq-question:focus-visible,
.related-card:focus-visible {
    outline: 3px solid var(--alaska-blue);
    outline-offset: 2px;
}

/* Loading States */
.calculating {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.calculating::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--alaska-blue);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Alaska-Themed Result Cards */
.result-card {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.05) 0%, rgba(59, 130, 246, 0.02) 100%);
    border: 1px solid var(--glacier-blue);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.result-card.savings {
    border-color: var(--success-color);
    background: linear-gradient(135deg, rgba(5, 150, 105, 0.05) 0%, rgba(16, 185, 129, 0.02) 100%);
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-light);
}

.result-item:last-child {
    border-bottom: none;
}

.result-value {
    font-weight: 600;
    color: var(--alaska-blue);
}

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

.result-value.pfd {
    color: var(--midnight-sun);
}

/* PFD Amount Conditional Display */
#pfdAmount {
    transition: var(--transition-base);
}

#pfdAmount.show {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}