/*
  AISEC Consultancy - Stylesheet
  Professionele, kleurrijke styling voor een AI security consultancy
  Features: Lichte thema met kleuraccenten, responsive layout
*/

:root {
    --color-primary: #2c5770;
    --color-primary-light: #3d7a9c;
    --color-primary-dark: #1a3a4d;
    --color-accent: #4a8db7;
    --color-accent-light: #6ba8cc;
    --color-secondary: #d4af37;
    --color-secondary-light: #e6c960;
    --color-teal: #3d8b8b;
    --color-text: #1f2937;
    --color-text-light: #4b5563;
    --color-background: #ffffff;
    --color-background-alt: #f5f9fc;
    --color-background-warm: #fdfcf7;
    --color-border: #e2e8f0;
    --color-success: #10b981;
    --gradient-hero: linear-gradient(135deg, #f5f9fc 0%, #e8f1f8 50%, #f5f9fc 100%);
    --gradient-accent: linear-gradient(135deg, #3d7a9c 0%, #4a8db7 100%);
    --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-color: 0 4px 14px rgba(74, 141, 183, 0.25);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3 {
    color: var(--color-primary);
    line-height: 1.3;
}

h1 {
    font-size: 2.75rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 16px;
    text-align: center;
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.section-intro {
    text-align: center;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto 48px;
    font-size: 1.1rem;
}

.btn {
    display: inline-block;
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--gradient-accent);
    color: white;
    box-shadow: var(--shadow-color);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(74, 141, 183, 0.4);
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 24px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    height: 90px;
    width: auto;
    object-fit: contain;
    display: block;
    transform: scale(1.15);
    transform-origin: left center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a:hover {
    color: var(--color-accent);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

.hero {
    padding: 160px 0 120px;
    background: var(--gradient-hero);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(74, 141, 183, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.06) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(74, 141, 183, 0.1);
    color: var(--color-primary);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 24px;
    border: 1px solid rgba(74, 141, 183, 0.25);
}

.hero h1 {
    margin-bottom: 24px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
}

.hero-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
    gap: 40px;
}

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

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

.hero-visual img {
    width: 100%;
    height: auto;
    display: block;
    max-width: 480px;
    margin: 0 auto;
    filter: drop-shadow(0 10px 25px rgba(0, 0, 0, 0.12));
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-light);
    max-width: 700px;
    margin: 0 0 40px;
    position: relative;
    z-index: 1;
}

.services {
    padding: 100px 0;
    background-color: var(--color-background);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: var(--transition);
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
    border-color: transparent;
}

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

.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    border-radius: 12px;
    margin-bottom: 20px;
    color: var(--color-accent);
}

.service-card h3 {
    margin-bottom: 16px;
    color: var(--color-primary);
}

.service-card p {
    color: var(--color-text-light);
    margin-bottom: 20px;
}

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

.service-card li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 10px;
    color: var(--color-text);
    font-size: 0.95rem;
}

.service-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 10px;
    height: 10px;
    background: var(--gradient-accent);
    border-radius: 50%;
}

.services-photo {
    margin: 32px auto 0;
    max-width: 880px;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(226, 232, 240, 0.9);
    position: relative;
}

.services-photo::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.18));
    pointer-events: none;
}

.services-photo img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    filter: saturate(0.9) brightness(1.02);
}

.why-aisec {
    margin-top: 60px;
    text-align: center;
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
}

.why-aisec h3 {
    font-size: 2rem;
    margin-bottom: 40px;
    color: var(--color-primary);
}

.why-aisec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.why-aisec-item {
    background: var(--color-background-alt);
    padding: 30px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.why-aisec-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.why-aisec-item h4 {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.why-aisec-item p {
    color: var(--color-text-light);
    line-height: 1.6;
    font-size: 0.98rem;
}

.approach {
    padding: 120px 0 100px;
    background: linear-gradient(180deg, var(--color-background-alt) 0%, var(--color-background) 100%);
}

.approach-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.approach-step {
    text-align: center;
    padding: 32px 24px;
    background: var(--color-background);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.approach-step:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--gradient-accent);
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: 20px;
    box-shadow: var(--shadow-color);
}

.approach-step h3 {
    margin-bottom: 12px;
    color: var(--color-primary);
}

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

.about {
    padding: 100px 0;
    position: relative;
    background-color: var(--color-background);
    overflow: hidden;
    border-bottom: 1px solid rgba(226, 232, 240, 0.9);
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(44, 87, 112, 0.5), rgba(74, 141, 183, 0.5), transparent);
}

.about::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("about-bg.png");
    background-size: 120%;
    background-position: center;
    opacity: 0.6;
    pointer-events: none;
    z-index: 0;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.92);
    padding: 48px;
    border-radius: 20px;
    border: 1px solid rgba(74, 141, 183, 0.15);
    position: relative;
    z-index: 1;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--color-text);
    font-size: 1.05rem;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.contact {
    padding: 100px 0;
    background: linear-gradient(180deg, #f5f8fb 0%, #edf2f8 100%);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    max-width: 960px;
    margin: 40px auto 0;
    padding: 32px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(226, 232, 240, 0.9);
}

.contact-form {
    background: transparent;
    padding: 0;
    box-shadow: none;
    border: none;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--color-border);
    border-radius: 10px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--color-background);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(74, 141, 183, 0.1);
}

.contact-form .btn {
    width: 100%;
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    z-index: 1;
}


.contact-info p {
    color: var(--color-text-light);
    margin-bottom: 12px;
}

.email-link {
    font-size: 1.25rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.email-link:hover {
    opacity: 0.8;
}

.contact-note {
    margin-top: 24px;
    font-size: 0.9rem;
}

.faq {
    padding: 80px 0 100px;
    background-color: var(--color-background);
    border-top: 1px solid rgba(226, 232, 240, 0.9);
}

.faq-list {
    max-width: 900px;
    margin: 40px auto 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.faq-item {
    background: var(--color-background-alt);
    border-radius: 14px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

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

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background: transparent;
    border: none;
    text-align: left;
    font-family: inherit;
    font-size: 1.1rem;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
    font-weight: 600;
    color: var(--color-primary);
    transition: color 0.2s ease;
    list-style: none;
}

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

.faq-question::marker {
    display: none;
    content: "";
}

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

.faq-icon {
    flex-shrink: 0;
    margin-left: 12px;
    color: var(--color-accent);
    transition: transform 0.3s ease;
}

.faq-item[open] .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 24px 20px;
}

.faq-answer p {
    font-size: 0.98rem;
    color: var(--color-text-light);
    line-height: 1.65;
    margin: 0;
}

.content-page {
    padding-top: 88px;
}

.content-hero {
    padding: 60px 0 20px;
    background: radial-gradient(circle at top left, rgba(59, 130, 246, 0.08), transparent),
                radial-gradient(circle at top right, rgba(15, 118, 110, 0.06), transparent),
                var(--color-background);
    border-bottom: 1px solid rgba(226, 232, 240, 0.9);
}

.content-hero h1 {
    font-size: 2.1rem;
    margin-bottom: 10px;
}

.content-intro {
    max-width: 720px;
}

.content-section {
    padding: 40px 0 80px;
    background-color: var(--color-background);
}

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

.content-container h2 {
    margin-top: 32px;
    margin-bottom: 10px;
}

.content-container p,
.content-container ul {
    font-size: 0.98rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

.content-container ul {
    padding-left: 1.2rem;
}

.content-container li + li {
    margin-top: 4px;
}

.content-meta {
    margin-top: 30px;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.footer {
    background: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0;
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer .container {
    max-width: 1000px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.footer-content h3,
.footer-content h4 {
    color: #fff;
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.footer-content p {
    margin-bottom: 8px;
}

.footer-content a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-content a:hover {
    color: #fff;
}

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

.footer-links li {
    margin-bottom: 8px;
}

.form-success {
    text-align: center;
    padding: 40px;
    color: var(--color-success);
}

.form-success h3 {
    color: var(--color-success);
    margin-bottom: 12px;
}

@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .approach-steps {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .hero-layout {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-visual img {
        max-width: 360px;
    }
    
    .hero-subtitle {
        margin: 0 auto 40px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-background);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: var(--shadow-md);
        display: none;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu a::after {
        display: none;
    }
    
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .services,
    .approach,
    .about,
    .contact {
        padding: 80px 0;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .approach-steps {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-info {
        text-align: center;
    }
    
    .about-content {
        padding: 32px 24px;
    }
    
    .why-aisec h3 {
        font-size: 1.75rem;
        margin-bottom: 30px;
    }

    .why-aisec-grid {
        grid-template-columns: 1fr;
    }

    .why-aisec-item {
        padding: 25px;
    }

    .faq {
        padding: 60px 0 80px;
    }

    .faq-list {
        margin-top: 32px;
        gap: 12px;
    }

    .faq-question {
        padding: 18px 20px;
        font-size: 1rem;
    }

    .faq-answer {
        padding: 0 20px 18px;
    }

    .footer {
        padding: 40px 0;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    .btn {
        padding: 14px 28px;
    }
    
    .service-card {
        padding: 24px;
    }
    
    .contact-form {
        padding: 24px;
    }
    
    .approach-step {
        padding: 24px 16px;
    }
}