/* --- Algemene Styles & Variabelen --- */
:root {
    --bg-color: #f4f5f5;
    --text-color: #555555;
    --accent-color: #febf11;
    --accent-color-dark: #D4A000;
    --white-color: #ffffff;
    --dark-color: #222222;
    --header-font: 'Playfair Display', serif;
    --body-font: 'Montserrat', sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--body-font); background-color: var(--bg-color); line-height: 1.7; }

.sticky-wrapper {
    /* De totale hoogte is 100vh per sectie. 4 secties = 400vh. */
    height: 400vh;
    position: relative;
    z-index: 1;
}
.split-section {
    position: sticky;
    top: 0;
    height: 100vh;
    width: 100%;
    display: flex;
    overflow: hidden;
}
.image-column, .content-column {
    flex: 0 0 50%; 
}
.split-section.layout-reversed {
    flex-direction: row-reverse;
}

/* --- Kolom en Content Styling --- */
.image-column {
    background-size: cover;
    background-position: center;
    position: relative;
    padding: 50px;
}

.split-section:nth-of-type(1) .image-column {
    background-image: linear-gradient(rgba(0,0,0,0.15), rgba(0,0,0,0.15)), url('../images/schaakbord-bg.jpg');
}

.split-section:nth-of-type(2) .image-column {
    background-image: linear-gradient(rgba(0,0,0,0.15), rgba(0,0,0,0.15)), url('../images/schaakbord-bg2.jpg');
}

.split-section:nth-of-type(3) .image-column {
    background-image: linear-gradient(rgba(0,0,0,0.15), rgba(0,0,0,0.15)), url('../images/schaakbord-bg3.jpg');
}

.split-section:nth-of-type(4) .image-column {
    background-image: linear-gradient(rgba(0,0,0,0.15), rgba(0,0,0,0.15)), url('../images/schaakbord-bg4.jpg');
}

.content-column {
    display: flex;
    flex-direction: column;
}
.split-section:first-of-type .content-column {
    padding: 50px;
}
.padded-content {
    padding: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background-color: var(--bg-color);
}

/* --- Logo --- */
.logo { position: relative; display: flex; align-items: center; gap: 20px; }
.logo-icon { width: 80px; height: 80px; background-color: var(--dark-color); background-image: url("../images/logo-icon.png"); background-repeat: no-repeat; background-position: center; background-size: 50%;}
.logo-text { color: var(--white-color); text-align: center; }
.logo-text .main-name { font-size: 1.5rem; font-weight: 700; letter-spacing: 2px; display: block; line-height: 1;}
.logo-text .sub-name { font-size: 1rem; letter-spacing: 5px; }


/* --- Navigatie --- */
header { width: 100%; display: flex; justify-content: flex-end; margin-bottom: 40px; }
#home-page header.page-header { margin-bottom: 0; }
nav ul { list-style: none; display: flex; gap: 30px; }
nav a { text-decoration: none; color: var(--dark-color); font-weight: 700; font-size: 1rem; transition: color 0.3s ease; }
nav a:hover { color: var(--accent-color); }
/* --- STIJL VOOR DE KALENDER-ICOON LINK --- */

/* Algemene styling voor de link */
.nav-calendar-link a {
    display: flex; /* Zorgt dat icoon en tekst naast elkaar kunnen */
    align-items: center;
    gap: 8px; /* Ruimte tussen icoon en tekst (voor mobiel) */
}

/* Specifiek voor desktop: verberg de tekst */
.nav-calendar-link .text {
    display: none;
}

/* Stijl voor het icoon zelf */
.nav-calendar-link .icon {
    display: inline-block;
    line-height: 0; /* Voorkomt extra witruimte */
}
.nav-calendar-link .icon svg {
    transition: transform 0.3s ease;
}
.nav-calendar-link a:hover .icon svg {
    transform: scale(1.15); /* Subtiele zoom bij hover */
}


/* --- Content Box --- */
.content-box { background-color: var(--white-color); padding: 50px; flex-grow: 1; box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05); position: relative; }
.content-box h1 { font-family: var(--header-font); font-size: 2.25rem; color: #000; margin-bottom: 2rem; }
.content-box p { color: var(--text-color); margin-bottom: 1.5rem; }
.checker-pattern { position: absolute; top: -1px; right: -1px; width: 90px; height: 90px; display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(3, 1fr); }
.checker-pattern div { background-color: var(--white-color); }
/* --- Jouw correcte checker-pattern --- */
.checker-pattern div:nth-child(1),
.checker-pattern div:nth-child(3),
.checker-pattern div:nth-child(5),
.checker-pattern div:nth-child(9) {
    background-color: var(--dark-color);
}

/* --- Knoppen --- */
.cta-buttons { display: flex; gap: 1rem; flex-wrap: wrap; }
.cta-button { display: inline-block; background: var(--dark-color); color: var(--accent-color); padding: 1rem 2rem; border-radius: 8px; text-decoration: none; font-weight: 700; transition: all 0.3s ease; border: 2px solid transparent; }
.cta-button:hover { transform: translateY(-3px); box-shadow: 0 4px 15px rgba(0,0,0,0.1); }
.cta-button.secondary { background: transparent; border-color: var(--dark-color); }
.cta-buttons--centered { justify-content: center; }


/* --- Stijlen voor nieuwe secties --- */
.section-title { font-family: var(--header-font); font-size: 2.5rem; text-align: center; margin-bottom: 3rem; color: var(--dark-color); }
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.5rem; }
.services-grid a {text-decoration: none; color: inherit; }

/* DE AANGEPASTE SERVICE-CARD */
.service-card {
    background: var(--white-color);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    min-height: 280px;
    
    /* DE SLEUTEL: Maak er een flex-container van */
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(254, 191, 17, 0.15);
    border-color: var(--accent-color); /* Zorg dat er een 'border: 1px solid #e0e0e0;' is voor dit effect */
}

/* Styling voor de H3 titel */
.service-card h3 {
    font-family: var(--header-font);
    font-size: 1.5rem; /* Iets groter voor meer impact */
    margin-bottom: 1rem; /* Ruimte onder de titel */
    color: var(--accent-color-dark);
}

/* Styling voor de afbeelding */
.service-card-image-link {
    display: block;
    margin-bottom: 1.5rem; /* Ruimte onder de afbeelding */
    border-radius: 4px;
    overflow: hidden;
}
.service-card img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}
.service-card:hover img {
    transform: scale(1.05); /* Subtiel zoom-effect */
}

/* Styling voor de paragraaftekst */
.service-card p {
    color: var(--text-color);
    line-height: 1.6;
    flex-grow: 1; /* DE SLEUTEL: duwt de footer naar de onderkant */
    padding-bottom: 1.5rem;
}

/* Styling voor de footer (knop-container) */
.service-card-footer {
    margin-top: auto; /* Zorgt ervoor dat het altijd onderaan staat */
}

/* Hergebruik de bestaande .cta-button stijl */
.service-card-footer .cta-button {
    display: block;
    width: 100%;
    color: var(--accent-color);
}

/* --- AANGEPASTE STIJL VOOR SERVICE CARD ICONEN --- */

.service-icon {
    /* Bepaal hier de grootte van de container van het icoon */
    width: 64px;
    height: 64px;
    
    /* Centreer de container zelf binnen de kaart */
    margin: 0 auto 1.5rem auto; 
    
    line-height: 1; /* Voorkomt onnodige extra ruimte */
}

/* De afbeelding zelf neemt de volledige ruimte van de container in */
.service-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* Zorgt dat het stuk niet wordt uitgerekt of afgesneden */
    transition: transform 0.3s ease; /* Voor het hover-effect */
}

/* Subtiel hover-effect op de kaart laat het icoon iets groeien */
.service-card:hover .service-icon img {
    transform: scale(1.1);
}

.about-content { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }
.about-text p { margin-bottom: 1rem; color: var(--dark-color); }
.stats-grid { display: grid; gap: 1rem; }
.stat-item { background: var(--white-color); padding: 1rem; border-radius: 8px; text-align: center; box-shadow: 0 5px 20px rgba(0,0,0,0.05); }
.stat-number { font-family: var(--header-font); font-size: 2rem; font-weight: 700; color: var(--dark-color); display: block; }
.stat-label { font-size: 0.8rem; color: var(--text-color); }
.contact-form { display: grid; gap: 1rem; background: var(--white-color); padding: 2.5rem; border-radius: 8px; box-shadow: 0 5px 20px rgba(0,0,0,0.05); }
.contact-form input, .contact-form textarea, .contact-form select { width: 100%; padding: 1rem; border: 1px solid #ddd; border-radius: 8px; color: var(--text-color); font-family: var(--body-font); font-size: 1rem; }
.contact-form textarea { resize: vertical; min-height: 120px; }
.contact-form .cta-button { width: 100%; border-color: var(--dark-color); cursor: pointer; }


/* --- EINDE HOMEPAGE --- */

/* --- START SUBPAGES --- */

.page-header {
    background: var(--white-color);
    padding: 1rem 50px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between; 
    align-items: center;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
}

.header-logo .logo-icon {
    width: 80px;
    height: 80px;
}

.header-logo .main-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-color);
    letter-spacing: 2px;
    display: block;
    line-height: 1;
}

.header-logo .sub-name {
    color: var(--dark-color);
}

.subpage-title-bar {
    background-color: var(--dark-color);
    color: var(--accent-color);
    text-align: center;
    padding: 3rem 2rem;
}
.subpage-title-bar h1 {
    font-family: var(--header-font);
    font-size: 3rem;
    letter-spacing: 2px;
}

/* De centrale content-kolom */
.page-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.page-content--full-width {
    max-width: 1200px; /* Of een andere brede waarde */
}

.page-content h2 {
    font-family: var(--header-font);
    font-size: 2.2rem;
    color: var(--dark-color);
    margin-bottom: 1.5rem;
}

.page-content .service-card h3 {
    background-color: var(--dark-color);
    padding: 0.5rem;
    border-radius: 4px;
    color: var(--accent-color);
}

.page-content p {
    color: #555;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}
.content-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 2rem 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.section-divider {
    border: none;
    border-top: 1px solid #e0e0e0;
    margin: 4rem auto;
}

/* --- EINDE SUBPAGES --- */


/* Styling voor formuliergroepen, consistent met activiteitenpagina */
.contact-form .form-group {
    margin-bottom: 1rem; /* Ruimte tussen de velden */
}
.contact-form .form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--dark-color);
}
/* Pas het bestaande input-veld aan om de label-styling over te nemen */
.contact-form #contactChessQuestion {
    width: 100%;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: var(--body-font);
    font-size: 1rem;
}


/* --- FOOTER STIJLING --- */
footer {
    background-color: var(--dark-color);
    color: var(--text-color); /* Gebruik de lichte tekstkleur voor contrast */
    padding: 4rem 2rem;
    margin-top: 4rem; /* Zorgt voor ruimte boven de footer */
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    /* Maak 3 kolommen op desktop, en laat ze omslaan op mobiel */
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.footer-column h3 {
    font-family: var(--header-font);
    color: var(--white-color); /* Maak de titels wit */
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.footer-column p, .footer-column li {
    margin-bottom: 0.8rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7); 
}

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

.footer-column a {
    color: rgba(255, 255, 255, 0.7); 
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: var(--accent-color); /* Geel hover-effect */
}

/* De <address> tag heeft standaard een cursieve stijl, die halen we weg */
.footer-column address {
    font-style: normal;
    color: rgba(255, 255, 255, 0.7); 
}

.footer-column .copyright {
    color: rgba(255, 255, 255, 0.7); 
    margin-top: 2rem;
    font-size: 0.9rem;
    opacity: 0.7;
}


/* --- NAVIGATIE + HAMBURGER MENU STIJLEN --- */
.main-nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
    margin: 0;
    padding: 0;
}
.main-nav a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 700;
}

.nav-home-link {
    display: none;
}

.hamburger-menu { display: none; /* Verborgen op desktop */ }

/* --- Mobiele weergave (Tablet en kleiner) --- */
@media (max-width: 1400px) {
    .hamburger-menu {
        display: block;
        background: none;
        border: none;
        cursor: pointer;
        padding: 10px;
        z-index: 1001;
    }
    .hamburger-menu span {
        display: block; width: 25px; height: 3px;
        background-color: var(--dark-color); margin: 5px 0;
        transition: all 0.3s ease-in-out;
    }

    /* Transformeer de bestaande .main-nav in een overlay */
    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(34, 34, 34, 0.98);
        
        display: flex;
        justify-content: center;
        align-items: center;

        /* Verberg het menu standaard */
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    }

    /* De 'open' state wordt aan de nav zelf toegevoegd */
    .main-nav.is-open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .main-nav ul {
        flex-direction: column;
    }
    .main-nav a {
        color: var(--white-color);
        font-size: 1.8rem;
    }

    .nav-home-link {
        display: list-item; /* Of 'block', beide werken hier */
    }
    
    .main-nav.is-open + .hamburger-menu span {
        background-color: var(--white-color);
    }

        /* Toon de tekst van de kalenderlink in het mobiele menu */
    .nav-calendar-link .text {
        display: inline;
    }
    
    /* Maak de link eruit zien als de andere mobiele menu-items */
    .nav-calendar-link a {
        color: var(--white-color);
        font-size: 1.8rem;
        font-weight: 700;
    }

    /* Optioneel: verberg het icoon op mobiel voor een nog schonere look */
    .nav-calendar-link .icon {
        display: none;
    }
}

/* --- EINDE NAVIGATIE + HAMBURGER MENU STIJLEN --- */

.quote {
    border-left: 4px solid var(--accent-color); 
    padding-left: 1.5rem; 
    font-style: italic; 
    margin: 2rem 0; 
    color: #555;
}


/* --- BOEKENPAGINA SLIDER STYLING --- */

/* Forceer de slider en zijn interne lagen om het volledige scherm te vullen */
#book-slider, 
#book-slider .splide__track, 
#book-slider .splide__list, 
#book-slider .splide__slide {
    height: calc(100vh - 113px); /* Hoogte van het scherm MIN de vaste header */
}

/* De .split-section binnen de slider is een normale flex-container */
#book-slider .split-section {
    position: relative; /* Reset 'sticky' */
    height: 100%;
}

/* DE SLEUTEL: Zorg dat de content-box de volledige hoogte vult */
#book-slider .content-box {
    display: flex;
    flex-direction: column;
    justify-content: center; /* Centreert de inhoud verticaal */
    width: 100%;
    height: 100%;
    /* Verwijder de flex-grow die niet werkte */
    flex-grow: 0; 
}

/* Pas de styling van de tekst BINNEN de slider specifiek aan */
#book-slider .content-box h2 {
    font-family: var(--header-font);
    font-size: 3rem;
    color: #000;
    margin-bottom: 1.5rem;
}

#book-slider .content-box p {
    color: #555555; /* Gebruik de goed leesbare tekstkleur */
    margin-bottom: 1.5rem;
}

#book-slider .content-box .quote {
    color: var(--accent-color-dark);
    font-size: 1.3rem;
    border-left: 3px solid var(--accent-color-dark);
    padding-left: 1.5rem;
    margin-bottom: 2rem;
    font-style: italic;
}

#book-slider .cta-buttons {
    margin-top: 2rem;
}

/* Styling voor de navigatiepijlen */
#book-slider .splide__arrow {
    background: rgba(34, 34, 34, 0.5);
    width: 50px;
    height: 50px;
}
#book-slider .splide__arrow svg {
    fill: white;
}

/* --- UNIVERSELE MODAL STYLING --- */

/* Achtergrond-overlay */
.modal {
    display: none; /* Standaard verborgen */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    justify-content: center;
    align-items: center;
}

/* De witte content-box van de modal */
.modal-content {
    position: relative;
    width: 95%;
    height: 90%;
    background-color: #fff; /* Witte achtergrond voor de iframe */
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.4);
}

/* De iframe die de pagina laadt */
.modal-content iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* De sluitknop */
.close-btn {
    position: absolute;
    top: 10px;
    right: 25px;
    background-color: var(--accent-color);
    color: var(--dark-color);
    border: none;
    border-radius: 50%; /* Maak hem rond voor een moderne look */
    width: 35px;
    height: 35px;
    font-size: 20px;
    font-weight: bold;
    line-height: 35px;
    text-align: center;
    cursor: pointer;
    z-index: 10000;
    transition: transform 0.3s ease;
}
.close-btn:hover {
    transform: scale(1.1);
}


/* --- STIJLEN VOOR PAGINA-NAVIGATIE ONDERAAN --- */

.page-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1.5rem;
    margin-top: 5rem; /* Ruimte boven de navigatiebalk */
    border-top: 1px solid #e0e0e0;
    padding-top: 2rem;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 1rem;
    text-decoration: none;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background-color: var(--white-color);
    border-color: var(--dark-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.nav-link .arrow {
    font-size: 1.5rem;
    color: var(--accent-color-dark);
}

.nav-link .link-text {
    display: flex;
    flex-direction: column;
}

.nav-link .label {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-color);
}

.nav-link .title {
    font-weight: 700;
    color: var(--dark-color);
}

/* Uitlijning voor 'vorige', 'grid' en 'volgende' */
.nav-link.prev {
    justify-content: flex-start;
    gap: 1rem;
}
.nav-link.to-grid {
    flex-direction: column;
    justify-content: center;
    text-align: center;
}
.nav-link.to-grid .arrow {
    margin-bottom: 0.5rem;
}
.nav-link.next {
    justify-content: flex-end;
    text-align: right;
    gap: 1rem;
}

/* Responsive aanpassingen */
@media (max-width: 767px) {
    .page-navigation {
        grid-template-columns: 1fr; /* Alles onder elkaar op mobiel */
    }
}


/* --- Responsive Design --- */

/* Tablet & grotere telefoons (tot 1024px) */
@media (max-width: 1400px) {
    /* --- Homepage Sticky Layout --- */
    .sticky-wrapper { height: auto; }
    .split-section, .split-section.layout-reversed {
        position: relative;
        flex-direction: column;
        height: auto;
        min-height: 100vh;
    }
    .image-column { min-height: 60vh; }
    .split-section:first-of-type .content-column, .padded-content { padding: 40px; }
    .about-content { grid-template-columns: 1fr; }

    /* --- Algemeen --- */
    .section-title { font-size: 2.2rem; }
    .content-box h1 { font-size: 1.75rem; }
    .page-header { padding: 1rem 30px; }
}

/* Mobiele telefoons (tot 767px) */
@media (max-width: 767px) {
    /* --- Homepage --- */
    .split-section:first-of-type .content-column, .padded-content { padding: 30px; }
    .logo { gap: 15px; }
    .logo-icon { width: 60px; height: 60px; }
    .logo-text .main-name { font-size: 1rem; }
    .logo-text .sub-name { font-size: 0.8rem; }
    .content-box h1 { font-size: 1.75rem; }
    .content-box { padding: 30px; }
    .services-grid { grid-template-columns: 1fr; }
    .about-content { grid-template-columns: 1fr; gap: 1rem; }

    /* --- Subpagina's --- */
    .page-header { padding: 0.75rem 20px; }
    .header-logo .logo-icon { width: 50px; height: 50px; }
    .header-logo .main-name { font-size: 1.2rem; }
    .subpage-title-bar h1 { font-size: 2rem; }
    .page-content { padding: 3rem 1.5rem; }
    .page-content h2 { font-size: 1.8rem; }
}

/* --- SPECIFIEKE RESPONSIVE STIJLEN VOOR BOEKENPAGINA SLIDER --- */

@media (max-width: 767px) {
    /* Reset de hoogte van de slider, de browser bepaalt het nu */
    #book-slider, 
    #book-slider .splide__track, 
    #book-slider .splide__list, 
    #book-slider .splide__slide {
        height: auto;
    }

    /* Verander de layout van de slide naar een verticale stapel */
    #book-slider .split-section {
        flex-direction: column;
    }
    #book-slider .image-column, 
    #book-slider .content-column {
        width: 100%;
        flex: 1 1 auto; /* Reset de flex-basis */
    }

    /* Geef de afbeelding een vaste, redelijke hoogte */
    #book-slider .image-column {
        min-height: 50vh; /* 50% van de schermhoogte */
        background-color: #e9e9e9; /* Nette achtergrond voor de afbeelding */
    }

    #book-slider .content-box {
        position: static; /* Haal de 'relative' positionering weg */
        padding: 2rem;
        text-align: center;
    }

    /* Verklein de lettertypes voor een betere leesbaarheid op mobiel */
    #book-slider .content-box h2 {
        font-size: 2rem;
    }
    #book-slider .content-box .quote {
        font-size: 1.1rem;
    }
}