/* Tuition and Fees Deduction Calculator - Professional Styling */

/* CSS Variables */
:root {
    --primary-color: #204080;
    --secondary-color: #5AC8FA;
    --dark-color: #0056CC;
    --light-color: #E3F2FD;
    --text-dark: #1a202c;
    --text-light: #4a5568;
    --text-muted: #718096;
    --border-color: #e2e8f0;
    --success-color: #48bb78;
    --warning-color: #ed8936;
    --error-color: #e53e3e;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #204080 0%, #5AC8FA 100%);
    --gradient-secondary: linear-gradient(135deg, #5AC8FA 0%, #204080 100%);
    --gradient-light: linear-gradient(135deg, #E3F2FD 0%, #ffffff 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Header Styles */
.header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

.logo img {
    height: 40px;
    width: auto;
}

.nav {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

.header-cta .cta-button {
    background: white;
    color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.header-cta .cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Breadcrumb */
.breadcrumb {
    background: var(--bg-light);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-sm);
    align-items: center;
    font-size: 0.875rem;
}

.breadcrumb-list li:not(:last-child)::after {
    content: "›";
    margin-left: var(--spacing-sm);
    color: var(--text-muted);
}

.breadcrumb-list a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb-list a:hover {
    color: var(--dark-color);
}

.breadcrumb-list li:last-child {
    color: var(--text-muted);
}

/* Main Content */
.main-content {
    padding: var(--spacing-2xl) 0;
}

/* Page Header */
.page-header {
    margin-bottom: var(--spacing-2xl);
}

.page-header-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.page-description {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

.page-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.feature-badge {
    background: var(--gradient-light);
    color: var(--primary-color);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
}

.page-header-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.calculator-preview {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    min-width: 200px;
}

.preview-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.preview-text {
    font-size: 1.125rem;
    font-weight: 600;
}

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

.calculator-container {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.calculator-header {
    background: var(--gradient-light);
    padding: var(--spacing-xl);
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.calculator-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.calculator-header p {
    color: var(--text-light);
    font-size: 1.125rem;
}

/* Form Styles */
.calculator-form {
    padding: var(--spacing-xl);
}

.form-section {
    margin-bottom: var(--spacing-xl);
}

.form-section:last-child {
    margin-bottom: 0;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--light-color);
    position: relative;
}

.section-title::before {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--gradient-primary);
}

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

.form-row:last-child {
    margin-bottom: 0;
}

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

.input-label {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.input-label.required::after {
    content: " *";
    color: var(--error-color);
    font-weight: 700;
}

.input-field {
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-family);
    transition: all var(--transition-normal);
    background: var(--bg-white);
    min-height: 48px;
}

.input-field:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(32, 64, 128, 0.1);
    transform: translateY(-1px);
}

.input-field:invalid {
    border-color: var(--error-color);
}

.input-field.error {
    border-color: var(--error-color);
    background-color: rgba(229, 62, 62, 0.05);
    animation: shake 0.3s ease-in-out;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-prefix {
    position: absolute;
    left: var(--spacing-md);
    color: var(--text-muted);
    font-weight: 600;
    z-index: 1;
    pointer-events: none;
}

.input-wrapper .input-field {
    padding-left: 2.5rem;
}

.help-text {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
    line-height: 1.4;
}

/* Checkbox Styles */
.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-weight: 500;
    color: var(--text-dark);
    line-height: 1.5;
}

.checkbox-input {
    display: none;
}

.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    flex-shrink: 0;
    margin-top: 2px;
}

.checkbox-input:checked + .checkbox-custom {
    background: var(--gradient-primary);
    border-color: var(--primary-color);
}

.checkbox-input:checked + .checkbox-custom::after {
    content: "✓";
    color: white;
    font-size: 0.875rem;
    font-weight: 700;
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.calculate-button {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-md);
    min-height: 56px;
}

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

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

.reset-button {
    background: transparent;
    color: var(--text-light);
    border: 2px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    min-height: 56px;
}

.reset-button:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Results Section */
.results-section {
    background: var(--gradient-light);
    margin: var(--spacing-xl) 0 0;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    animation: slideIn 0.5s ease-out;
}

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

.results-header h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
}

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

.result-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.result-card.primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
}

.result-label {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    opacity: 0.8;
}

.result-card.primary .result-label {
    opacity: 0.9;
}

.result-value {
    font-size: 2.5rem;
    font-weight: 800;
    font-family: var(--font-mono);
}

/* Results Details */
.results-details {
    display: grid;
    gap: var(--spacing-xl);
}

.detail-section {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.detail-section h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.detail-grid {
    display: grid;
    gap: var(--spacing-md);
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid #f1f5f9;
}

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

.detail-item.total {
    font-weight: 700;
    font-size: 1.125rem;
    border-top: 2px solid var(--border-color);
    border-bottom: none;
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.detail-label {
    color: var(--text-light);
    font-weight: 500;
}

.detail-value {
    font-weight: 600;
    color: var(--text-dark);
    font-family: var(--font-mono);
}

.detail-item.total .detail-value {
    color: var(--primary-color);
    font-size: 1.25rem;
}

/* Requirement List */
.requirement-list {
    display: grid;
    gap: var(--spacing-sm);
}

.requirement-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.requirement-item.met {
    background: rgba(72, 187, 120, 0.1);
    color: var(--success-color);
}

.requirement-item.not-met {
    background: rgba(229, 62, 62, 0.1);
    color: var(--error-color);
}

.requirement-icon {
    font-size: 1.25rem;
    font-weight: 700;
}

/* Information Sections */
.info-sections {
    margin: var(--spacing-2xl) 0;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.info-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

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

.info-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.info-icon {
    font-size: 2rem;
    background: var(--gradient-primary);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
}

.info-content p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

.info-list li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
}

.info-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* Income Table */
.income-table {
    background: var(--bg-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.table-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-md);
    font-weight: 600;
    color: var(--text-dark);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
    margin-bottom: var(--spacing-sm);
}

.table-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-light);
    font-family: var(--font-mono);
}

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

/* Related Calculators */
.related-calculators {
    margin: var(--spacing-2xl) 0;
}

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

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-light);
}

.calculators-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.calculator-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

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

.calculator-icon {
    font-size: 3rem;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.calculator-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.calculator-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

.calculator-cta {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
}

/* FAQ Section */
.faq-section {
    margin: var(--spacing-2xl) 0;
}

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

.faq-item {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: var(--spacing-lg);
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-normal);
}

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

.faq-icon {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: transform var(--transition-normal);
}

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

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-light);
    line-height: 1.6;
    display: none;
    animation: fadeIn 0.3s ease;
}

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

/* Footer */
.footer {
    background: var(--text-dark);
    color: #e2e8f0;
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
    font-weight: 600;
}

.footer-description {
    line-height: 1.6;
    margin: var(--spacing-md) 0;
    color: #cbd5e0;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: #cbd5e0;
    text-decoration: none;
    transition: color var(--transition-normal);
}

.footer-links a:hover {
    color: var(--secondary-color);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-link {
    font-size: 1.5rem;
    text-decoration: none;
    transition: transform var(--transition-normal);
}

.social-link:hover {
    transform: translateY(-2px);
}

.contact-info p {
    margin-bottom: var(--spacing-sm);
    color: #cbd5e0;
}

.footer-bottom {
    border-top: 1px solid #2d3748;
    padding-top: var(--spacing-lg);
}

.footer-bottom-content {
    text-align: center;
    color: #a0aec0;
}

.footer-bottom-content p {
    margin-bottom: var(--spacing-sm);
}

.disclaimer-text {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Validation Modal */
.validation-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.validation-content {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalIn 0.3s ease;
}

.validation-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.validation-header h3 {
    color: var(--error-color);
    font-size: 1.25rem;
    font-weight: 600;
}

.validation-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.validation-close:hover {
    background: var(--bg-light);
    color: var(--text-dark);
}

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

.validation-body ul {
    list-style: none;
    padding: 0;
}

.validation-body li {
    background: rgba(229, 62, 62, 0.1);
    color: var(--error-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    border-left: 4px solid var(--error-color);
}

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

.validation-button {
    background: var(--error-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.validation-button:hover {
    background: #c53030;
    transform: translateY(-1px);
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .calculators-grid {
        grid-template-columns: 1fr;
    }
    
    .page-header-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .results-summary {
        grid-template-columns: 1fr;
    }
    
    .table-header,
    .table-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .table-header > div,
    .table-row > div {
        text-align: left;
        padding: var(--spacing-xs) 0;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-md: 0.75rem;
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .nav {
        order: 1;
        gap: var(--spacing-md);
    }
    
    .header-cta {
        order: 2;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .page-description {
        font-size: 1.125rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .page-header h1 {
        font-size: 1.75rem;
    }
    
    .calculator-form {
        padding: var(--spacing-md);
    }
    
    .results-section {
        padding: var(--spacing-md);
    }
    
    .validation-content {
        width: 95%;
        margin: var(--spacing-md);
    }
    
    .feature-badge {
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

/* Print Styles */
@media print {
    .header,
    .breadcrumb,
    .related-calculators,
    .footer,
    .validation-modal {
        display: none;
    }
    
    .main-content {
        padding: 0;
    }
    
    .calculator-container,
    .info-card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .results-section {
        page-break-inside: avoid;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000;
        --text-light: #000;
        --text-muted: #333;
    }
    
    .input-field {
        border-width: 3px;
    }
    
    .calculator-card,
    .info-card {
        border-width: 2px;
    }
}

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

/* Focus Styles for Accessibility */
.input-field:focus,
.calculate-button:focus,
.reset-button:focus,
.nav-link:focus,
.faq-question:focus {
    outline: 3px solid var(--secondary-color);
    outline-offset: 2px;
}

/* Loading States */
.calculate-button.loading {
    pointer-events: none;
    opacity: 0.7;
}

.calculate-button.loading .button-text::after {
    content: "...";
    animation: dots 1.5s infinite;
}

@keyframes dots {
    0%, 20% { content: "..."; }
    40% { content: "...."; }
    60% { content: "....."; }
    80%, 100% { content: "..."; }
}