/* Homeoffice vs Commuting Calculator CSS - Mobile-First Single Column Design */
/* homeoffice-pauschale.com - German Tax Comparison Calculator */

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

/* German Design Color Scheme */
:root {
    /* German Government and Financial Institution Colors */
    --color-primary: #003366;        /* Deep Blue - German Government Standard */
    --color-primary-light: #0066cc;  /* Light Blue - Interactive Elements */
    --color-secondary: #4a5568;      /* Dark Gray - Secondary Text */
    --color-accent: #d69e2e;         /* Gold - Emphasis and Success */
    
    /* German Functional Colors */
    --color-success: #38a169;        /* Green - Success/Correct */
    --color-warning: #ed8936;        /* Orange - Warning */
    --color-danger: #e53e3e;         /* Red - Error/Danger */
    --color-info: #3182ce;           /* Info Blue */
    
    /* Comparison Specific Colors */
    --color-homeoffice: #38a169;     /* Green for Homeoffice */
    --color-commuting: #3182ce;      /* Blue for Commuting */
    --color-winner: #d69e2e;         /* Gold for Winner */
    
    /* German Design Neutral Colors */
    --color-light: #f7fafc;          /* Very Light Gray - Background */
    --color-light-gray: #edf2f7;     /* Light Gray - Dividers */
    --color-medium-gray: #a0aec0;    /* Medium Gray - Secondary Elements */
    --color-dark-gray: #2d3748;      /* Dark Gray - Main Text */
    --color-dark: #1a202c;           /* Dark - Headlines */
    
    /* German Typography Optimized Fonts */
    --font-family-primary: 'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;
    --font-family-secondary: 'Roboto', 'Segoe UI', Tahoma, sans-serif;
    
    /* German User Preferred Font Sizes */
    --font-size-xs: 0.75rem;         /* 12px */
    --font-size-sm: 0.875rem;        /* 14px */
    --font-size-base: 1rem;          /* 16px - German Website Standard */
    --font-size-lg: 1.125rem;        /* 18px */
    --font-size-xl: 1.25rem;         /* 20px */
    --font-size-2xl: 1.5rem;         /* 24px */
    --font-size-3xl: 1.875rem;       /* 30px */
    
    /* German Design Line Heights and Spacing */
    --line-height-tight: 1.25;
    --line-height-base: 1.5;         /* German Text Optimal Line Height */
    --line-height-relaxed: 1.625;
    
    /* German Website Common Spacing System */
    --spacing-xs: 0.25rem;           /* 4px */
    --spacing-sm: 0.5rem;            /* 8px */
    --spacing-md: 1rem;              /* 16px */
    --spacing-lg: 1.5rem;            /* 24px */
    --spacing-xl: 2rem;              /* 32px */
    --spacing-2xl: 3rem;             /* 48px */
    --spacing-3xl: 4rem;             /* 64px */
    
    /* German Design Border Radius and Shadows */
    --border-radius-sm: 0.125rem;    /* 2px - Subtle Corners */
    --border-radius-base: 0.25rem;   /* 4px - Standard Corners */
    --border-radius-lg: 0.5rem;      /* 8px - Large Corners */
    
    /* German User Preferred Shadow Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 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);
    
    /* German Animation Preferences - Simple and Efficient */
    --transition-fast: 0.1s ease-out;
    --transition-base: 0.2s ease-in-out;
    --transition-slow: 0.3s ease-in-out;
    
    /* German Government Website Standard Borders */
    --border-width: 1px;
    --border-color: var(--color-light-gray);
    --border-style: solid;
}

/* Base Typography */
body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-dark-gray);
    background-color: var(--color-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Mobile-First Single Column Layout */
.single-column-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.site-header {
    background-color: var(--color-primary);
    color: white;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-base);
}

.main-nav {
    position: relative;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand .brand-link {
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-lg);
    display: flex;
    align-items: center;
}

.brand-logo {
    height: 40px;
    width: auto;
    color: white;
    transition: var(--transition-base);
}

.brand-logo:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-base);
    transition: var(--transition-base);
    flex-direction: column;
    gap: 4px;
}

.nav-toggle-icon {
    width: 24px;
    height: 3px;
    background-color: currentColor;
    border-radius: 2px;
    transition: var(--transition-base);
}

.nav-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-base);
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-link:hover,
.nav-link--active {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-item--dropdown .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    border-radius: var(--border-radius-base);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm);
    min-width: 250px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-base);
    z-index: 1000;
}

.nav-item--dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu {
    list-style: none;
}

.dropdown-link {
    display: block;
    color: var(--color-dark-gray);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-base);
    transition: var(--transition-base);
    font-size: var(--font-size-sm);
}

.dropdown-link:hover {
    background-color: var(--color-light);
    color: var(--color-primary);
}

.dropdown-icon {
    transition: var(--transition-base);
}

.nav-item--dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

/* Main Content - Single Column */
.main-content.single-column {
    flex: 1;
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    padding: var(--spacing-md);
}

.calculator-article {
    width: 100%;
    background-color: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-base);
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
}

/* Calculator Header */
.calculator-header {
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
}

.calculator-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-tight);
}

.calculator-description {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    line-height: var(--line-height-base);
}

/* Form Sections */
.calculator-form-section,
.calculator-results-section,
.how-it-works-section,
.comparison-table-section,
.scenarios-section,
.faq-section,
.related-tools-section,
.legal-disclaimer-section {
    padding: var(--spacing-xl) var(--spacing-lg);
}

.calculator-form-section {
    background-color: white;
}

.calculator-results-section {
    background-color: var(--color-light);
    border-top: 1px solid var(--color-light-gray);
}

/* Form Section Styling */
.form-section {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--color-light);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-primary);
}

.section-title {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
}

/* Mobile-First Single Column Form */
.calculator-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    width: 100%;
}

.calculator__form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
}

.calculator__label {
    font-weight: 600;
    color: var(--color-dark);
    font-size: var(--font-size-base);
    line-height: var(--line-height-tight);
}

.calculator__label--required::after {
    content: " *";
    color: var(--color-danger);
    font-weight: bold;
}

.calculator__input {
    padding: var(--spacing-md);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius-base);
    font-size: var(--font-size-base);
    font-family: var(--font-family-primary);
    background-color: white;
    transition: var(--transition-base);
    color: var(--color-dark-gray);
    min-height: 44px; /* German Accessibility Standard */
}

.calculator__input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 51, 102, 0.1);
}

.calculator__input--invalid {
    border-color: var(--color-danger);
    background-color: rgba(229, 62, 62, 0.05);
}

.calculator__help-text {
    font-size: var(--font-size-sm);
    color: var(--color-secondary);
    line-height: var(--line-height-base);
}

.calculator__error-message {
    font-size: var(--font-size-sm);
    color: var(--color-danger);
    font-weight: 500;
    display: none;
}

.calculator__error-message.show {
    display: block;
}

/* German Style Buttons */
.calculator__form-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.calculator__button {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius-base);
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: var(--font-family-primary);
    cursor: pointer;
    transition: var(--transition-base);
    text-align: center;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    min-height: 44px; /* German Accessibility Standard */
    width: 100%;
}

.calculator__button--primary {
    background-color: var(--color-primary);
    color: white;
}

.calculator__button--primary:hover {
    background-color: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.calculator__button--secondary {
    background-color: var(--color-light-gray);
    color: var(--color-dark-gray);
    border: var(--border-width) var(--border-style) var(--border-color);
}

.calculator__button--secondary:hover {
    background-color: var(--color-medium-gray);
}

/* Comparison Results Styling */
.comparison-results {
    background-color: white;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-base);
}

.results-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.winner-announcement {
    background: linear-gradient(135deg, var(--color-winner) 0%, #f6ad55 100%);
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-base);
}

.winner-announcement h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

.winner-announcement .amount {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin: var(--spacing-md) 0;
}

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

.comparison-card {
    background-color: var(--color-light);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border-left: 4px solid var(--color-primary);
    transition: var(--transition-base);
}

.comparison-card.winner {
    border-left-color: var(--color-winner);
    background: linear-gradient(135deg, rgba(214, 158, 46, 0.1) 0%, rgba(246, 173, 85, 0.1) 100%);
}

.comparison-card h4 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.comparison-card .amount {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-success);
    margin-bottom: var(--spacing-sm);
}

.comparison-card .details {
    font-size: var(--font-size-sm);
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
}

/* Detailed Breakdown Styles */
.detailed-breakdown {
    margin-top: var(--spacing-xl);
}

.detailed-breakdown h3 {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.breakdown-table {
    background-color: var(--color-light);
    border-radius: var(--border-radius-base);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

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

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

.breakdown-row--total {
    font-weight: 600;
    font-size: var(--font-size-lg);
    border-top: 2px solid var(--color-primary);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-md);
}

.breakdown-row--highlight {
    background-color: rgba(214, 158, 46, 0.1);
    margin: var(--spacing-sm) calc(-1 * var(--spacing-lg));
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-base);
    font-weight: 600;
    color: var(--color-primary);
}

.breakdown-label {
    color: var(--color-dark-gray);
}

.breakdown-value {
    font-weight: 600;
    color: var(--color-primary);
}

.recommendation-box {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    margin-top: var(--spacing-lg);
}

.recommendation-box h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: white;
}

.recommendation-box p {
    line-height: var(--line-height-relaxed);
    opacity: 0.95;
}

.tax-savings {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-top: var(--spacing-sm);
    opacity: 0.9;
}

/* Section Styles */
.section-content {
    max-width: 100%;
}

.section-content h2 {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    font-weight: 700;
}

/* How It Works Section */
.how-it-works-section {
    background-color: white;
    border-top: 1px solid var(--color-light-gray);
}

.steps-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--color-light);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-primary);
}

.step-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.step-content h3 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.step-content p {
    color: var(--color-dark-gray);
    line-height: var(--line-height-relaxed);
}

/* Comparison Table Section */
.comparison-table-section {
    background-color: var(--color-light);
    border-top: 1px solid var(--color-light-gray);
}

.table-container {
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
    border-radius: var(--border-radius-base);
    box-shadow: var(--shadow-base);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
    font-size: var(--font-size-sm);
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-light-gray);
    vertical-align: top;
}

.comparison-table th {
    background-color: var(--color-primary);
    color: white;
    font-weight: 600;
    position: sticky;
    top: 0;
}

.comparison-table tr:hover {
    background-color: var(--color-light);
}

/* Scenarios Section */
.scenarios-section {
    background-color: white;
    border-top: 1px solid var(--color-light-gray);
}

.scenarios-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
}

.scenario-item {
    background-color: var(--color-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-accent);
}

.scenario-item h3 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.scenario-details p {
    margin-bottom: var(--spacing-sm);
    line-height: var(--line-height-relaxed);
}

.scenario-details p:last-child {
    font-weight: 600;
    color: var(--color-primary);
}

/* FAQ Section */
.faq-section {
    background-color: var(--color-light);
    border-top: 1px solid var(--color-light-gray);
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.faq-item {
    background-color: white;
    border-radius: var(--border-radius-base);
    border: 1px solid var(--color-light-gray);
    overflow: hidden;
}

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

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

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

.faq-icon {
    font-size: var(--font-size-xl);
    font-weight: 300;
    transition: var(--transition-base);
}

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

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.faq-answer.show {
    display: block;
}

.faq-answer p {
    color: var(--color-dark-gray);
    line-height: var(--line-height-relaxed);
    margin: 0;
}

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

/* Related Tools Section */
.related-tools-section {
    background-color: white;
    border-top: 1px solid var(--color-light-gray);
}

.tools-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
}

.tool-item {
    background-color: var(--color-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-light-gray);
    transition: var(--transition-base);
}

.tool-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.tool-item h3 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.tool-item p {
    color: var(--color-dark-gray);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-md);
}

.tool-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: var(--transition-base);
}

.tool-link:hover {
    color: var(--color-primary-light);
    text-decoration: underline;
}

/* Legal Disclaimer */
.legal-disclaimer-section {
    background-color: var(--color-light);
    border-top: 1px solid var(--color-light-gray);
}

.legal-disclaimer {
    background-color: var(--color-light);
    border-left: 4px solid var(--color-warning);
    padding: var(--spacing-lg);
    border-radius: 0 var(--border-radius-base) var(--border-radius-base) 0;
}

.legal-disclaimer h3 {
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.legal-disclaimer p {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--color-dark-gray);
    margin-bottom: var(--spacing-sm);
}

.legal-disclaimer p:last-child {
    margin-bottom: 0;
}

.legal-disclaimer a {
    color: var(--color-primary);
    text-decoration: none;
}

.legal-disclaimer a:hover {
    text-decoration: underline;
}

/* Social Media Share Component */
.social-share-section {
    padding: var(--spacing-xl) var(--spacing-lg);
    background-color: var(--color-light);
    border-top: 1px solid var(--color-light-gray);
}

.social-share-container {
    background-color: white;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-base);
    border-left: 4px solid var(--color-accent);
}

.social-share-title {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.social-share-description {
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-base);
}

.social-share-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.social-share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-base);
    font-size: var(--font-size-sm);
    font-weight: 600;
    font-family: var(--font-family-primary);
    cursor: pointer;
    transition: var(--transition-base);
    text-decoration: none;
    min-height: 44px; /* German Accessibility Standard */
    position: relative;
    overflow: hidden;
}

.social-share-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.social-share-btn:hover::before {
    left: 100%;
}

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

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

.social-icon {
    flex-shrink: 0;
}

/* Platform-specific colors */
.social-share-btn--facebook {
    background-color: #1877f2;
    color: white;
}

.social-share-btn--facebook:hover {
    background-color: #166fe5;
}

.social-share-btn--twitter {
    background-color: #1da1f2;
    color: white;
}

.social-share-btn--twitter:hover {
    background-color: #1a91da;
}

.social-share-btn--linkedin {
    background-color: #0077b5;
    color: white;
}

.social-share-btn--linkedin:hover {
    background-color: #006ba1;
}

.social-share-btn--whatsapp {
    background-color: #25d366;
    color: white;
}

.social-share-btn--whatsapp:hover {
    background-color: #22c55e;
}

.social-share-btn--copy {
    background-color: var(--color-secondary);
    color: white;
}

.social-share-btn--copy:hover {
    background-color: var(--color-dark-gray);
}

.share-success-message {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-success);
    color: white;
    border-radius: var(--border-radius-base);
    font-weight: 600;
    animation: slideInUp 0.3s ease-out;
}

.success-icon {
    font-size: var(--font-size-lg);
    font-weight: bold;
}

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

/* Footer */
.site-footer {
    background-color: var(--color-dark);
    color: var(--color-light-gray);
    padding: var(--spacing-lg);
    text-align: center;
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content a {
    color: var(--color-primary-light);
    text-decoration: none;
}

.footer-content a:hover {
    text-decoration: underline;
}

/* Mobile Optimizations (320px - 767px) */
@media (max-width: 767px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-primary);
        box-shadow: var(--shadow-lg);
        z-index: 1000;
        flex-direction: column;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-list {
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-lg);
    }

    .nav-item {
        width: 100%;
    }

    .nav-link {
        display: block;
        padding: var(--spacing-md);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-item--dropdown .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background-color: rgba(255, 255, 255, 0.1);
        box-shadow: none;
        margin-top: var(--spacing-sm);
    }

    .dropdown-link {
        color: rgba(255, 255, 255, 0.8);
        padding: var(--spacing-sm) var(--spacing-lg);
    }

    .dropdown-link:hover {
        background-color: rgba(255, 255, 255, 0.1);
        color: white;
    }

    .main-content.single-column {
        padding: var(--spacing-sm);
    }

    .calculator-article {
        border-radius: var(--border-radius-base);
        box-shadow: var(--shadow-sm);
    }
    
    .calculator-header {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .calculator-title {
        font-size: var(--font-size-xl);
    }
    
    .calculator-description {
        font-size: var(--font-size-base);
    }
    
    .calculator-form-section,
    .calculator-results-section,
    .how-it-works-section,
    .comparison-table-section,
    .scenarios-section,
    .faq-section,
    .related-tools-section,
    .social-share-section,
    .legal-disclaimer-section {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    /* Mobile social share */
    .social-share-buttons {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .social-share-btn {
        padding: var(--spacing-md);
        font-size: var(--font-size-sm);
    }

    .brand-logo {
        height: 28px;
    }
    
    .form-section {
        padding: var(--spacing-md);
    }
    
    /* Mobile step items */
    .step-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .step-number {
        align-self: center;
    }
    
    /* Mobile table */
    .comparison-table {
        font-size: var(--font-size-xs);
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: var(--spacing-sm);
    }
    
    /* Mobile FAQ */
    .faq-question {
        padding: var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    .faq-answer {
        padding: 0 var(--spacing-md) var(--spacing-md);
    }
}

/* Tablet Adaptation (768px - 991px) */
@media (min-width: 768px) and (max-width: 991px) {
    .main-content.single-column {
        max-width: 720px;
        padding: var(--spacing-lg);
    }
    
    .calculator__form-actions {
        flex-direction: row;
    }
    
    .calculator__button {
        width: auto;
        flex: 1;
    }
    
    .comparison-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop Single Column Layout (992px+) */
@media (min-width: 992px) {
    .main-content.single-column {
        max-width: 800px; /* Single Column Max Width for Reading Comfort */
        padding: var(--spacing-xl);
    }
    
    .nav-toggle {
        display: none;
    }
    
    .calculator__form-actions {
        flex-direction: row;
        justify-content: center;
    }
    
    .calculator__button {
        width: auto;
        min-width: 200px;
    }
    
    /* Desktop grid layouts */
    .comparison-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Desktop steps layout */
    .steps-container {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xl);
    }
    
    /* Desktop table improvements */
    .comparison-table {
        font-size: var(--font-size-base);
    }
}

/* Large Screen Single Column Layout (1200px+) */
@media (min-width: 1200px) {
    .main-content.single-column {
        max-width: 900px; /* Limit Max Width to Avoid Content Too Wide */
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --color-primary: #000066;
        --color-dark: #000000;
        --border-width: 2px;
    }
}


/* Print Styles */
@media print {
    .nav-toggle,
    .calculator-form-section {
        display: none;
    }
    
    .comparison-results {
        border: 1px solid #000;
        padding: var(--spacing-md);
    }
    
    .site-header,
    .site-footer {
        display: none;
    }
}