/* ============================================
   ExactOnlineMCP.nl - Style Sheet
   Mobile-first responsive design
   ============================================ */

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-secondary: #7c3aed;
    --color-accent: #06b6d4;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-text-inverse: #ffffff;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #0f172a;
    --color-border: #e2e8f0;
    --gradient-hero: linear-gradient(135deg, #1e3a8a 0%, #7c3aed 50%, #2563eb 100%);
    --gradient-cta: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
    --max-width: 1200px;
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.3s ease;
}

/* ---- Reset & Base ---- */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

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

/* ---- Typography ---- */

h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 700;
    color: var(--color-text);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }

/* ---- Layout ---- */

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.25rem;
}

section {
    padding: 4rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--gradient-cta);
    border-radius: 2px;
    margin: 0.75rem auto 0;
}

.section-header p {
    color: var(--color-text-light);
    max-width: 640px;
    margin: 0 auto;
    font-size: 1.1rem;
}

/* ---- Buttons ---- */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    text-decoration: none;
    line-height: 1.2;
}

.btn-primary {
    background: var(--gradient-cta);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--color-text-inverse);
}

.btn-secondary {
    background: rgba(255,255,255,0.15);
    color: var(--color-text-inverse);
    border: 2px solid rgba(255,255,255,0.3);
    backdrop-filter: blur(4px);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.25);
    color: var(--color-text-inverse);
}

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

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* ---- Header / Navigation ---- */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: box-shadow var(--transition);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-logo span {
    background: var(--gradient-cta);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: none;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--color-text-light);
    font-weight: 500;
    font-size: 0.925rem;
    transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary);
}

.nav-cta {
    display: none;
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    background: none;
    border: none;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

.hamburger.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
    opacity: 0;
}

.hamburger.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    padding: 2rem 1.25rem;
    z-index: 999;
}

.mobile-menu.open {
    display: block;
}

.mobile-menu ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mobile-menu a {
    display: block;
    padding: 0.875rem 0;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
}

.mobile-menu .btn {
    margin-top: 1.5rem;
    width: 100%;
    justify-content: center;
}

/* ---- Hero Section ---- */

.hero {
    background: var(--gradient-hero);
    color: var(--color-text-inverse);
    padding: 8rem 0 5rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(6,182,212,0.15) 0%, transparent 70%);
    border-radius: 50%;
}

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

.hero h1 {
    color: var(--color-text-inverse);
    font-size: 2.25rem;
    margin-bottom: 1.25rem;
    max-width: 700px;
}

.hero p {
    font-size: 1.125rem;
    line-height: 1.8;
    max-width: 600px;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50px;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(4px);
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #34d399;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ---- Wat is MCP Section ---- */

.features-grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

.feature-icon-card {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--color-bg);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(124,58,237,0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.75rem;
}

.feature-icon-card h3 {
    margin-bottom: 0.5rem;
}

.feature-icon-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.mcp-explanation {
    max-width: 800px;
    margin: 0 auto 2rem;
    text-align: center;
}

.mcp-explanation p {
    font-size: 1.05rem;
    color: var(--color-text-light);
    margin-bottom: 1rem;
}

/* ---- AI-assistenten Section ---- */

#ai-assistenten {
    background: var(--color-bg-alt);
}

.llm-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.llm-card {
    background: var(--color-bg);
    border-radius: var(--radius);
    padding: 1.75rem;
    border: 1px solid var(--color-border);
    text-align: center;
    transition: all var(--transition);
}

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

.llm-icon {
    margin-bottom: 0.75rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 48px;
}

.llm-card h3 {
    margin-bottom: 0.5rem;
}

.llm-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* ---- Hoe werkt het Section ---- */

#hoe-werkt-het {
    background: var(--color-bg-alt);
}

.steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    counter-reset: step;
}

.step {
    position: relative;
    padding: 2rem 1.5rem 2rem 5rem;
    background: var(--color-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    counter-increment: step;
    transition: all var(--transition);
}

.step:hover {
    box-shadow: var(--shadow-md);
}

.step::before {
    content: counter(step);
    position: absolute;
    left: 1.25rem;
    top: 2rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-cta);
    color: var(--color-text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.step h3 {
    margin-bottom: 0.5rem;
}

.step p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* ---- Voordelen Section ---- */

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.feature-card {
    padding: 2rem;
    background: var(--color-bg);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-cta);
    opacity: 0;
    transition: opacity var(--transition);
}

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

.feature-card:hover::before {
    opacity: 1;
}

.feature-card-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* ---- Toepassingen Section ---- */

#toepassingen {
    background: var(--color-bg-alt);
}

.use-cases {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.use-case {
    background: var(--color-bg);
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.use-case:hover {
    box-shadow: var(--shadow-md);
}

.use-case-role {
    display: inline-block;
    background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(124,58,237,0.1));
    color: var(--color-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.use-case h3 {
    margin-bottom: 0.75rem;
}

.use-case-query {
    background: var(--color-bg-dark);
    color: #e2e8f0;
    padding: 1rem;
    border-radius: var(--radius-sm);
    font-family: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    position: relative;
}

.use-case-query::before {
    content: '>';
    color: var(--color-accent);
    margin-right: 0.5rem;
}

.use-case p:last-child {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* ---- CTA Section ---- */

.cta-section {
    background: var(--gradient-hero);
    color: var(--color-text-inverse);
    text-align: center;
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
    border-radius: 50%;
}

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

.cta-section h2 {
    color: var(--color-text-inverse);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.cta-section p {
    opacity: 0.9;
    margin-bottom: 2rem;
    font-size: 1.1rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

/* ---- FAQ Section ---- */

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

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    overflow: hidden;
    transition: all var(--transition);
}

.faq-item:hover {
    border-color: var(--color-primary);
}

.faq-item summary {
    padding: 1.25rem 3rem 1.25rem 1.25rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    list-style: none;
    position: relative;
    transition: background var(--transition);
}

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

.faq-item summary::after {
    content: '+';
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-text-light);
    transition: transform var(--transition);
}

.faq-item[open] summary::after {
    content: '-';
}

.faq-item[open] summary {
    background: var(--color-bg-alt);
}

.faq-answer {
    padding: 0 1.25rem 1.25rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ---- Footer ---- */

.site-footer {
    background: var(--color-bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    color: var(--color-text-inverse);
    margin-bottom: 0.5rem;
}

.footer-brand h3 span {
    background: var(--gradient-cta);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    font-size: 0.95rem;
}

.footer-links h4 {
    color: var(--color-text-inverse);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.footer-links a {
    color: rgba(255,255,255,0.6);
    font-size: 0.925rem;
    display: block;
    padding: 0.25rem 0;
    transition: color var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.85rem;
}

/* ---- Scroll Animations ---- */

.animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate.visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-delay-1 { transition-delay: 0.1s; }
.animate-delay-2 { transition-delay: 0.2s; }
.animate-delay-3 { transition-delay: 0.3s; }
.animate-delay-4 { transition-delay: 0.4s; }

/* ---- Responsive: Tablet (768px+) ---- */

@media (min-width: 768px) {
    h1 { font-size: 2.75rem; }
    h2 { font-size: 2.25rem; }

    .features-grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .llm-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .use-cases {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-content {
        grid-template-columns: 2fr 1fr 1fr;
    }

    .hero {
        padding: 10rem 0 6rem;
    }

    .hero h1 {
        font-size: 3rem;
    }
}

/* ---- Responsive: Desktop (1024px+) ---- */

@media (min-width: 1024px) {
    h1 { font-size: 3.25rem; }

    .nav-links {
        display: flex;
    }

    .nav-cta {
        display: inline-flex;
    }

    .hamburger {
        display: none;
    }

    .llm-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .steps {
        grid-template-columns: repeat(4, 1fr);
    }

    .hero h1 {
        font-size: 3.5rem;
    }

    section {
        padding: 6rem 0;
    }
}