/* ===================================
   Reiskosten Berekenen - Style Sheet
   Mobile-First Responsive Design
   =================================== */

/* CSS Variables */
:root {
    --primary: #0066CC;
    --primary-dark: #004C99;
    --secondary: #00A86B;
    --accent: #FF6B35;
    --success: #28A745;
    --warning: #FFC107;
    --danger: #DC3545;
    --background: #F8F9FA;
    --surface: #FFFFFF;
    --text: #212529;
    --text-light: #6C757D;
    --border: #DEE2E6;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    --transition: all 0.3s ease;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--background);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--text);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Header & Navigation */
.site-header {
    background-color: var(--surface);
    box-shadow: 0 2px 8px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary);
    text-decoration: none;
}

.logo svg {
    flex-shrink: 0;
}

.logo span {
    display: none;
}

.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 3px;
    background-color: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-menu {
    display: none;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-menu li a {
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-menu li a:hover {
    background-color: var(--background);
    text-decoration: none;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: var(--spacing-xl) var(--spacing-sm);
    text-align: center;
}

.hero h1 {
    color: white;
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
}

.hero .subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
}

/* Main Content Sections */
main {
    padding: var(--spacing-lg) 0;
}

.calculator-section,
.info-section,
.scenarios-section {
    margin-bottom: var(--spacing-xl);
}

.section-intro {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

/* Calculator Card */
.calculator-card {
    background-color: var(--surface);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 4px 12px var(--shadow);
}

/* Form Styles */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--text-light);
    font-size: 0.875rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    font-weight: 500;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-share {
    display: inline-block;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-lg);
}

.btn-secondary {
    background-color: var(--background);
    color: var(--text);
    width: 100%;
    margin-top: var(--spacing-sm);
}

.btn-secondary:hover {
    background-color: var(--border);
}

/* Results Display */
.results-card {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: var(--border-radius-lg);
}

.results-card h3 {
    color: var(--success);
    margin-bottom: var(--spacing-md);
}

.result-main {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.total-cost {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.total-cost .amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.total-cost .label {
    font-size: 1rem;
    color: var(--text-light);
    margin-top: var(--spacing-xs);
}

.result-details {
    display: grid;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background-color: var(--surface);
    border-radius: var(--border-radius);
}

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

.detail-value {
    font-weight: 700;
    color: var(--text);
    font-size: 1.1rem;
}

/* Share Section */
.share-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--border);
}

.share-section h4 {
    margin-bottom: var(--spacing-md);
}

.share-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.btn-share {
    padding: 0.75rem;
    background-color: var(--surface);
    color: var(--text);
    border: 2px solid var(--border);
    font-size: 0.9rem;
}

.btn-share:hover {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-2px);
}

.btn-share span {
    font-size: 1.2rem;
    margin-right: 0.25rem;
}

.btn-whatsapp:hover { background-color: #25D366; border-color: #25D366; }
.btn-email:hover { background-color: #EA4335; border-color: #EA4335; }
.btn-copy:hover { background-color: #6C757D; border-color: #6C757D; }
.btn-pdf:hover { background-color: #DC3545; border-color: #DC3545; }

/* Distance Table */
.distance-table {
    overflow-x: auto;
    margin-top: var(--spacing-md);
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--surface);
    border-radius: var(--border-radius);
    overflow: hidden;
}

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

th, td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

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

tbody tr:hover {
    background-color: var(--background);
}

/* Steps Grid */
.steps-grid {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.step-card {
    background-color: var(--surface);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px var(--shadow);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

/* Formula Box */
.formula-box {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--surface);
    border-left: 4px solid var(--primary);
    border-radius: var(--border-radius);
}

.formula-box code {
    display: block;
    padding: var(--spacing-sm);
    background-color: var(--background);
    border-radius: var(--border-radius);
    font-family: 'Courier New', monospace;
    margin: var(--spacing-sm) 0;
    overflow-x: auto;
}

/* Scenario Cards */
.scenario-grid {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.scenario-card {
    display: block;
    background-color: var(--surface);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px var(--shadow);
    transition: var(--transition);
    text-decoration: none;
    color: var(--text);
}

.scenario-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 16px var(--shadow-lg);
    text-decoration: none;
}

.scenario-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.scenario-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.scenario-card p {
    color: var(--text-light);
    margin-bottom: 0;
}

/* Features Grid */
.features-grid {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.feature {
    background-color: var(--surface);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
}

.feature-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.feature h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.feature p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0;
}

.highlight-section {
    background-color: var(--surface);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 12px var(--shadow);
}

/* FAQ */
.faq-list {
    margin-top: var(--spacing-md);
}

.faq-item {
    background-color: var(--surface);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.faq-item summary {
    padding: var(--spacing-md);
    cursor: pointer;
    font-weight: 600;
    list-style: none;
    user-select: none;
    transition: var(--transition);
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::before {
    content: '▶';
    margin-right: var(--spacing-xs);
    transition: var(--transition);
}

.faq-item[open] summary::before {
    transform: rotate(90deg);
}

.faq-item summary:hover {
    background-color: var(--background);
}

.faq-item p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--text-light);
    margin-bottom: 0;
}

/* Footer */
.site-footer {
    background-color: var(--text);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.footer-grid,
.footer-content {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-col h3,
.footer-col h4,
.footer-section h3,
.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-sm);
}

.footer-col p,
.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.footer-col ul,
.footer-section ul {
    list-style: none;
}

.footer-col ul li,
.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-col ul li a,
.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.footer-col ul li a:hover,
.footer-section ul li a:hover {
    color: white;
    text-decoration: none;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.disclaimer {
    font-size: 0.75rem !important;
    font-style: italic;
}

/* Cookie Consent */
.cookie-consent {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--surface);
    box-shadow: 0 -4px 12px var(--shadow);
    padding: var(--spacing-md);
    z-index: 10000;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

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

.cookie-content p {
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
}

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

.btn-accept,
.btn-necessary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-accept:hover {
    background-color: var(--primary-dark);
}

.btn-necessary {
    background-color: var(--background);
    color: var(--text);
}

.btn-necessary:hover {
    background-color: var(--border);
}

/* Toast Notification */
.toast {
    position: fixed;
    top: 80px;
    right: var(--spacing-md);
    background-color: var(--success);
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px var(--shadow);
    z-index: 10000;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Tablet Styles (768px+) */
@media (min-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .logo span { display: inline; }
    
    .mobile-menu-toggle { display: none; }
    
    .nav-menu {
        display: flex;
    }
    
    .hero h1 { font-size: 2.5rem; }
    
    .steps-grid,
    .scenario-grid,
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid,
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .share-buttons {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .cookie-buttons {
        flex-direction: row;
        justify-content: flex-end;
    }
    
    .cookie-content {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--spacing-lg);
    }
    
    .cookie-content p {
        margin-bottom: 0;
        flex: 1;
    }
}

/* Desktop Styles (1024px+) */
@media (min-width: 1024px) {
    .container { padding: 0 var(--spacing-lg); }
    
    h1 { font-size: 3rem; }
    
    .hero h1 { font-size: 3rem; }
    
    .steps-grid,
    .scenario-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-grid,
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .calculator-card {
        padding: var(--spacing-xl);
    }
}

/* Print Styles */
@media print {
    .site-header,
    .hero,
    .share-section,
    .site-footer,
    .cookie-consent,
    .btn-secondary {
        display: none !important;
    }
    
    body {
        background-color: white;
    }
    
    .calculator-card,
    .results-card {
        box-shadow: none;
        border: 1px solid #000;
    }
}

/* Accessibility */
:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Loading State */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ===================================
   AdSense Ad Containers
   =================================== */

.ad-container {
    margin: 2rem auto;
    min-height: 250px;
    max-width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f9fa;
    border: 1px dashed #dee2e6;
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
}

.ad-container::before {
    content: "Advertentie";
    color: #6c757d;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Ad container when active (AdSense loaded) */
.ad-container.active {
    background: transparent;
    border: none;
    min-height: auto;
}

.ad-container.active::before {
    display: none;
}

/* Specific ad sizes */
.ad-container.ad-leaderboard {
    min-height: 90px;
    max-width: 728px;
}

.ad-container.ad-rectangle {
    min-height: 280px;
    max-width: 336px;
}

.ad-container.ad-skyscraper {
    min-height: 600px;
    max-width: 160px;
}

.ad-container.ad-large-rectangle {
    min-height: 280px;
    max-width: 336px;
}

/* Responsive ad container */
.ad-container.ad-responsive {
    min-height: 100px;
}

/* Ad sidebar for desktop */
.ad-sidebar {
    display: none;
}

@media (min-width: 1024px) {
    .ad-sidebar {
        display: block;
        position: sticky;
        top: 100px;
        padding: var(--spacing-md);
    }
    
    .content-with-sidebar {
        display: grid;
        grid-template-columns: 1fr 200px;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .ad-container.ad-leaderboard {
        min-height: 60px;
        max-width: 320px;
    }
    
    .ad-container.ad-rectangle {
        min-height: 250px;
        max-width: 300px;
    }
}

/* ===================================
   Breadcrumb Navigation
   =================================== */

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

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.875rem;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb li a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.breadcrumb li a:hover {
    background-color: rgba(0, 102, 204, 0.1);
    text-decoration: none;
}

.breadcrumb li span {
    color: var(--text);
    padding: 0.25rem 0.5rem;
}

.breadcrumb-separator {
    color: var(--text-light);
    margin: 0 0.25rem;
    user-select: none;
}

@media (max-width: 768px) {
    .breadcrumb ol {
        font-size: 0.8125rem;
    }
    
    .breadcrumb li a,
    .breadcrumb li span {
        padding: 0.25rem 0.375rem;
    }
}