/* ==========================================================================
   Rekeningrijden Nederland - Main Styles
   Dutch infrastructure-inspired design
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
    /* Colors - Dutch road infrastructure inspired */
    --color-asphalt: #1a1d21;
    --color-asphalt-light: #2a2f36;
    --color-concrete: #f5f4f0;
    --color-concrete-dark: #e8e6e0;
    --color-marking: #f7b731;
    --color-marking-light: #ffd56b;
    --color-marking-glow: rgba(247, 183, 49, 0.15);
    --color-sign-green: #00875a;
    --color-sign-green-dark: #006644;
    --color-sign-blue: #0066cc;
    --color-danger: #dc3545;
    --color-success: #28a745;
    --color-text: #2d3436;
    --color-text-muted: #636e72;
    --color-white: #ffffff;

    /* Typography */
    --font-display: 'Instrument Serif', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;

    /* Layout */
    --max-width: 1200px;
    --content-width: 800px;
    --border-radius: 8px;
    --border-radius-lg: 16px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Header height */
    --header-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + var(--space-lg));
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-concrete);
    overflow-x: hidden;
}

/* Decorative road pattern background */
.road-pattern {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: -1;
    opacity: 0.03;
    background-image:
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 100px,
            var(--color-asphalt) 100px,
            var(--color-asphalt) 102px
        );
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-asphalt);
    color: var(--color-white);
    padding: var(--space-sm) var(--space-md);
    z-index: 1000;
    border-radius: var(--border-radius);
}

.skip-link:focus {
    top: var(--space-md);
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-asphalt);
}

h1 {
    font-size: clamp(2rem, 6vw, 3.5rem);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-lg);
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    margin-bottom: var(--space-md);
    margin-top: var(--space-xl);
}

h3 {
    font-size: 1.25rem;
    font-family: var(--font-body);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    margin-top: var(--space-lg);
}

h4 {
    font-size: 1.125rem;
    font-family: var(--font-body);
    font-weight: 600;
}

p {
    margin-bottom: var(--space-md);
}

.lead {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--color-text);
}

em {
    font-style: italic;
}

strong {
    font-weight: 700;
}

a {
    color: var(--color-sign-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

ul, ol {
    margin-bottom: var(--space-md);
    padding-left: var(--space-lg);
}

li {
    margin-bottom: var(--space-xs);
}

blockquote {
    border-left: 4px solid var(--color-marking);
    padding-left: var(--space-md);
    margin: var(--space-lg) 0;
    font-style: italic;
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(245, 244, 240, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    height: var(--header-height);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-asphalt);
    font-weight: 500;
    font-size: 1.125rem;
    text-decoration: none;
}

.logo:hover {
    color: var(--color-asphalt);
    text-decoration: none;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-asphalt);
    color: var(--color-marking);
    border-radius: 50%;
    flex-shrink: 0;
}

.logo-text {
    font-weight: 500;
}

.logo-tld {
    color: var(--color-marking);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-md);
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-asphalt);
    background: rgba(0, 0, 0, 0.04);
}

.nav-links .nav-cta {
    background: var(--color-marking);
    color: var(--color-asphalt);
    font-weight: 600;
}

.nav-links .nav-cta:hover {
    background: var(--color-marking-light);
}

/* Mobile menu toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-sm);
    cursor: pointer;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-asphalt);
    position: relative;
    transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-asphalt);
    transition: transform var(--transition-fast);
}

.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }

@media (max-width: 900px) {
    .nav-toggle {
        display: block;
        z-index: 101;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        height: 100dvh; /* Dynamic viewport height for mobile */
        background: var(--color-white);
        flex-direction: column;
        padding: calc(var(--header-height) + var(--space-lg)) var(--space-lg) var(--space-lg);
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
        transition: right var(--transition-base);
        gap: var(--space-xs);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .nav-links.is-open {
        right: 0;
    }

    /* Overlay when menu is open */
    .nav-links.is-open::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 280px;
        bottom: 0;
        background: rgba(0, 0, 0, 0.3);
        z-index: -1;
    }

    .nav-links li {
        margin: 0;
    }

    .nav-links a {
        display: block;
        padding: var(--space-md);
        border-radius: var(--border-radius);
    }

    .nav-links .nav-cta {
        margin-top: var(--space-md);
        text-align: center;
    }

    .nav-toggle[aria-expanded="true"] .hamburger {
        background: transparent;
    }

    .nav-toggle[aria-expanded="true"] .hamburger::before {
        transform: rotate(45deg) translate(5px, 6px);
    }

    .nav-toggle[aria-expanded="true"] .hamburger::after {
        transform: rotate(-45deg) translate(5px, -6px);
    }

    /* Prevent body scroll when menu is open */
    body.menu-open {
        overflow: hidden;
    }
}

/* --------------------------------------------------------------------------
   Main Content Area
   -------------------------------------------------------------------------- */
#main-content {
    padding-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
.section {
    padding: var(--space-2xl) var(--space-lg);
}

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-header {
    margin-bottom: var(--space-xl);
}

.section-number {
    display: block;
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--color-marking);
    margin-bottom: var(--space-sm);
    letter-spacing: 0.1em;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    padding: var(--space-xl) var(--space-lg);
}

.hero-container {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: var(--space-xl);
}

.hero-label {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--color-marking);
    color: var(--color-asphalt);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: 2px;
    margin-bottom: var(--space-md);
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    display: block;
    font-size: 0.5em;
    color: var(--color-text-muted);
    font-family: var(--font-body);
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero-intro {
    font-size: 1.25rem;
    max-width: 600px;
    margin-bottom: var(--space-xl);
    color: var(--color-text-muted);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background: var(--color-asphalt-light);
    color: var(--color-white);
    text-decoration: none;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-asphalt);
    border: 2px solid var(--color-asphalt);
}

.btn-secondary:hover {
    background: var(--color-asphalt);
    color: var(--color-white);
    text-decoration: none;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding-top: var(--space-lg);
    margin-top: var(--space-lg);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.stat {
    text-align: left;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--color-asphalt);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 48px;
    background: rgba(0, 0, 0, 0.1);
}

/* Hero Visual - KM Counter */
.hero-visual {
    position: relative;
}

.km-counter {
    background: var(--color-asphalt);
    padding: var(--space-lg) var(--space-xl);
    border-radius: var(--border-radius);
    box-shadow:
        0 4px 6px rgba(0, 0, 0, 0.1),
        0 20px 40px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: baseline;
    gap: var(--space-md);
}

.km-digits {
    display: flex;
    gap: 2px;
    font-family: 'Courier New', monospace;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-concrete);
    text-shadow: 0 0 20px rgba(247, 183, 49, 0.3);
}

.km-digits span {
    background: var(--color-asphalt-light);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 4px;
    min-width: 1.5em;
    text-align: center;
}

.km-digits span.dot {
    background: transparent;
    padding: 0;
    min-width: auto;
    color: var(--color-marking);
}

.km-unit {
    font-size: 1rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

@media (max-width: 900px) {
    .hero-container {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        display: none;
    }

    .hero-stats {
        flex-wrap: wrap;
    }
}

/* --------------------------------------------------------------------------
   Page Hero
   -------------------------------------------------------------------------- */
.page-hero {
    background: var(--color-asphalt);
    color: var(--color-white);
    padding: var(--space-2xl) var(--space-lg);
}

.page-hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
}

.page-hero h1 {
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.page-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 700px;
}

/* Breadcrumbs */
.breadcrumbs {
    margin-bottom: var(--space-lg);
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.875rem;
}

.breadcrumbs li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin: 0;
}

.breadcrumbs li:not(:last-child)::after {
    content: '›';
    color: rgba(255, 255, 255, 0.5);
}

.breadcrumbs a {
    color: rgba(255, 255, 255, 0.7);
}

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

.breadcrumbs span {
    color: var(--color-marking);
}

/* --------------------------------------------------------------------------
   Page Body
   -------------------------------------------------------------------------- */
.page-body {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
}

.page-body h2:first-child {
    margin-top: 0;
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

/* Info Card */
.info-card {
    background: var(--color-concrete);
    padding: var(--space-lg);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-marking);
}

.info-card h3,
.info-card h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    margin-top: 0;
}

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

.info-card li {
    padding: var(--space-xs) 0;
    color: var(--color-asphalt);
    font-weight: 500;
}

/* Highlight Box */
.highlight-box {
    background: var(--color-marking-glow);
    border: 1px solid var(--color-marking);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    margin: var(--space-lg) 0;
}

.highlight-box h3,
.highlight-box h4 {
    color: var(--color-asphalt);
    margin-top: 0;
}

/* --------------------------------------------------------------------------
   Comparison Cards
   -------------------------------------------------------------------------- */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-lg);
    align-items: center;
}

.comparison-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    height: 100%;
}

.comparison-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: 4px;
    margin-bottom: var(--space-sm);
}

.comparison-now .comparison-badge {
    background: var(--color-concrete);
    color: var(--color-text-muted);
}

.comparison-future .comparison-badge {
    background: var(--color-marking);
    color: var(--color-asphalt);
}

.comparison-arrow {
    color: var(--color-marking);
}

@media (max-width: 900px) {
    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .comparison-arrow {
        transform: rotate(90deg);
        justify-self: center;
    }
}

/* --------------------------------------------------------------------------
   Pros & Cons
   -------------------------------------------------------------------------- */
.proscons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.proscons-card {
    background: var(--color-white);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.proscons-card h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 3px solid;
    margin-top: 0;
}

.pros h3 {
    border-color: var(--color-success);
}

.cons h3 {
    border-color: var(--color-danger);
}

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

.proscons-card li {
    padding: var(--space-md) 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    margin: 0;
}

.proscons-card li:last-child {
    border-bottom: none;
}

.proscons-card li strong {
    display: block;
    color: var(--color-asphalt);
    margin-bottom: var(--space-xs);
}

.proscons-card li span {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   FAQ Section
   -------------------------------------------------------------------------- */
.faq-list {
    max-width: var(--content-width);
}

.faq-item {
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) 0;
    cursor: pointer;
    list-style: none;
}

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

.faq-question {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-asphalt);
    padding-right: var(--space-lg);
}

.faq-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    position: relative;
    transition: transform var(--transition-base);
}

.faq-icon::before,
.faq-icon::after {
    content: '';
    position: absolute;
    background: var(--color-marking);
    border-radius: 2px;
}

.faq-icon::before {
    width: 100%;
    height: 3px;
    top: 50%;
    transform: translateY(-50%);
}

.faq-icon::after {
    width: 3px;
    height: 100%;
    left: 50%;
    transform: translateX(-50%);
    transition: transform var(--transition-base);
}

.faq-item[open] .faq-icon::after {
    transform: translateX(-50%) scaleY(0);
}

.faq-answer {
    padding-bottom: var(--space-lg);
    color: var(--color-text-muted);
    animation: fadeIn var(--transition-base) ease;
}

.faq-answer p:last-child {
    margin-bottom: 0;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --------------------------------------------------------------------------
   Calculator
   -------------------------------------------------------------------------- */
.calculator {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.calculator h2 {
    text-align: center;
    margin-top: 0;
    margin-bottom: var(--space-lg);
}

.calculator-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

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

.form-group label {
    font-weight: 600;
    color: var(--color-asphalt);
}

.form-group input[type="number"],
.form-group input[type="text"] {
    padding: var(--space-md);
    font-size: 1.25rem;
    border: 2px solid var(--color-concrete-dark);
    border-radius: var(--border-radius);
    font-family: var(--font-body);
    transition: border-color var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-marking);
}

.form-group .input-hint {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.rate-options {
    display: flex;
    gap: var(--space-md);
}

.rate-option {
    flex: 1;
    position: relative;
}

.rate-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.rate-option label {
    display: block;
    padding: var(--space-md);
    text-align: center;
    background: var(--color-concrete);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.rate-option input:checked + label {
    background: var(--color-marking-glow);
    border-color: var(--color-marking);
    color: var(--color-asphalt);
}

.rate-option label:hover {
    border-color: var(--color-marking);
}

.calculator-result {
    background: var(--color-asphalt);
    color: var(--color-white);
    padding: var(--space-xl);
    border-radius: var(--border-radius);
    text-align: center;
    margin-top: var(--space-md);
}

.result-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
}

.result-amount {
    font-family: var(--font-display);
    font-size: 3rem;
    color: var(--color-marking);
    line-height: 1;
}

.result-period {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--space-sm);
}

.calculator-disclaimer {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: var(--space-md);
}

/* Custom rate input */
.custom-rate-wrapper {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-concrete-dark);
}

.custom-rate-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.custom-rate-toggle input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-marking);
}

.custom-rate-input {
    display: none;
    margin-top: var(--space-sm);
}

.custom-rate-input.is-visible {
    display: block;
}

.custom-rate-input input {
    width: 100%;
    padding: var(--space-md);
    font-size: 1.125rem;
    border: 2px solid var(--color-concrete-dark);
    border-radius: var(--border-radius);
    font-family: var(--font-body);
    transition: border-color var(--transition-fast);
}

.custom-rate-input input:focus {
    outline: none;
    border-color: var(--color-marking);
}

.custom-rate-input .input-hint {
    margin-top: var(--space-xs);
}

.rate-options.is-disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* --------------------------------------------------------------------------
   Related Pages
   -------------------------------------------------------------------------- */
.related-pages {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.related-pages h2 {
    text-align: center;
    margin-top: 0;
}

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

.related-card {
    display: block;
    background: var(--color-white);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: all var(--transition-base);
    text-decoration: none;
}

.related-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
    text-decoration: none;
}

.related-card h3 {
    color: var(--color-asphalt);
    margin: 0 0 var(--space-sm) 0;
    transition: color var(--transition-fast);
}

.related-card:hover h3 {
    color: var(--color-sign-blue);
}

.related-card p {
    color: var(--color-text-muted);
    margin: 0;
    font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   Forms Section (for Vormen page)
   -------------------------------------------------------------------------- */
.forms-grid {
    display: grid;
    gap: var(--space-xl);
}

.form-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.form-card-header {
    background: var(--color-asphalt);
    color: var(--color-white);
    padding: var(--space-lg) var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.form-card-number {
    width: 48px;
    height: 48px;
    background: var(--color-marking);
    color: var(--color-asphalt);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.form-card-header h3 {
    color: var(--color-white);
    margin: 0;
    font-family: var(--font-display);
    font-size: 1.5rem;
}

.form-card-body {
    padding: var(--space-xl);
}

.form-card-body p:last-child {
    margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Dark Section
   -------------------------------------------------------------------------- */
.section-dark {
    background: var(--color-asphalt);
    color: var(--color-concrete);
}

.section-dark h2,
.section-dark h3 {
    color: var(--color-concrete);
}

.section-dark .lead {
    color: rgba(245, 244, 240, 0.8);
}

/* --------------------------------------------------------------------------
   CTA Section
   -------------------------------------------------------------------------- */
.section-cta {
    background: linear-gradient(135deg, var(--color-marking) 0%, #e5a82e 100%);
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    color: var(--color-asphalt);
    margin: 0 0 var(--space-md) 0;
}

.cta-content p {
    color: rgba(26, 29, 33, 0.8);
    font-size: 1.125rem;
    margin: 0 0 var(--space-lg) 0;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
    background: var(--color-asphalt);
    color: rgba(245, 244, 240, 0.7);
    padding: var(--space-2xl) var(--space-lg) var(--space-lg);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: var(--space-lg);
}

.footer-brand .logo-text {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-concrete);
    display: block;
    margin-bottom: var(--space-md);
}

.footer-brand p {
    font-size: 0.9rem;
    margin: 0;
}

.footer-nav h4 {
    font-family: var(--font-body);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(245, 244, 240, 0.5);
    margin-bottom: var(--space-md);
}

.footer-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-nav li {
    margin-bottom: var(--space-sm);
}

.footer-nav a {
    color: rgba(245, 244, 240, 0.7);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-nav a:hover {
    color: var(--color-marking);
    text-decoration: none;
}

.footer-bottom {
    text-align: center;
    font-size: 0.8rem;
}

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

.disclaimer {
    color: rgba(245, 244, 240, 0.5);
}

@media (max-width: 900px) {
    .footer-main {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-lg);
    }

    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 480px) {
    .footer-main {
        grid-template-columns: 1fr;
    }

    .footer-brand {
        grid-column: span 1;
    }
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

    html {
        scroll-behavior: auto;
    }
}

/* Focus styles */
:focus-visible {
    outline: 3px solid var(--color-marking);
    outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Mobile Optimizations
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    :root {
        --space-lg: 1.5rem;
        --space-xl: 2.5rem;
        --space-2xl: 4rem;
    }

    body {
        font-size: 0.9375rem;
    }

    .lead {
        font-size: 1.1rem;
    }

    /* Header mobile */
    .nav-container {
        padding: 0 var(--space-md);
    }

    .logo {
        font-size: 1rem;
    }

    .logo-icon {
        width: 36px;
        height: 36px;
    }

    .logo-text {
        display: none;
    }

    /* Sections mobile */
    .section {
        padding: var(--space-xl) var(--space-md);
    }

    .page-body {
        padding: var(--space-xl) var(--space-md);
    }

    .page-hero {
        padding: var(--space-xl) var(--space-md);
    }

    /* Hero mobile */
    .hero {
        min-height: auto;
        padding: var(--space-lg) var(--space-md);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-intro {
        font-size: 1rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-stats {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }

    .stat-divider {
        display: none;
    }

    .stat {
        display: flex;
        align-items: baseline;
        gap: var(--space-sm);
    }

    .stat-number {
        font-size: 1.5rem;
    }

    /* Cards mobile */
    .card {
        padding: var(--space-lg);
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    /* Comparison mobile */
    .comparison-card {
        padding: var(--space-lg);
    }

    /* Pros/Cons mobile */
    .proscons-grid {
        grid-template-columns: 1fr;
    }

    .proscons-card {
        padding: var(--space-lg);
    }

    /* FAQ mobile */
    .faq-question {
        font-size: 1.1rem;
    }

    /* Calculator mobile */
    .calculator {
        padding: var(--space-lg);
        margin: 0 calc(-1 * var(--space-md));
        border-radius: 0;
    }

    .rate-options {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .result-amount {
        font-size: 2.25rem;
    }

    .calculator-result {
        padding: var(--space-lg);
    }

    /* Form cards mobile */
    .form-card-header {
        padding: var(--space-md);
    }

    .form-card-body {
        padding: var(--space-lg);
    }

    .form-card-number {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }

    .form-card-header h3 {
        font-size: 1.25rem;
    }

    /* Related pages mobile */
    .related-pages {
        padding: var(--space-xl) var(--space-md);
    }

    .related-grid {
        grid-template-columns: 1fr;
    }

    .related-card {
        padding: var(--space-lg);
    }

    /* Footer mobile */
    .site-footer {
        padding: var(--space-xl) var(--space-md) var(--space-md);
    }

    /* Tables mobile */
    table {
        font-size: 0.85rem;
    }

    table th,
    table td {
        padding: var(--space-sm) !important;
    }

    /* Highlight box mobile */
    .highlight-box {
        padding: var(--space-md);
    }

    /* Info card mobile */
    .info-card {
        padding: var(--space-md);
    }

    /* Buttons mobile */
    .btn {
        padding: var(--space-md);
        font-size: 0.9375rem;
    }

    /* Section CTA mobile */
    .section-cta {
        padding: var(--space-xl) var(--space-md);
    }

    /* Grid layouts on homepage */
    [style*="grid-template-columns: 2fr 1fr"],
    [style*="grid-template-columns: 1fr 1fr"] {
        display: block !important;
    }

    [style*="grid-template-columns: 2fr 1fr"] > *,
    [style*="grid-template-columns: 1fr 1fr"] > * {
        margin-bottom: var(--space-lg);
    }
}

@media (max-width: 480px) {
    :root {
        --space-lg: 1.25rem;
        --space-xl: 2rem;
        --space-2xl: 3rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.375rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 0.6em;
    }

    .page-hero h1 {
        font-size: 1.5rem;
    }

    .page-subtitle {
        font-size: 1rem;
    }

    .result-amount {
        font-size: 2rem;
    }

    .faq-question {
        font-size: 1rem;
    }

    .breadcrumbs {
        font-size: 0.8rem;
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
    .nav-links a,
    .btn,
    .rate-option label,
    .faq-item summary {
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .rate-option label {
        justify-content: center;
        flex-direction: column;
    }

    input[type="number"],
    input[type="text"] {
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

/* Safe area for notched devices */
@supports (padding: max(0px)) {
    .site-header {
        padding-left: max(var(--space-lg), env(safe-area-inset-left));
        padding-right: max(var(--space-lg), env(safe-area-inset-right));
    }

    .site-footer {
        padding-bottom: max(var(--space-lg), env(safe-area-inset-bottom));
    }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
    .site-header,
    .hero-visual,
    .section-cta,
    .nav-toggle {
        display: none;
    }

    .section {
        padding: var(--space-lg) 0;
    }

    body {
        background: white;
        color: black;
    }

    a {
        color: black;
        text-decoration: underline;
    }

    .page-hero {
        background: #eee;
        color: black;
    }

    .page-hero h1 {
        color: black;
    }
}