/* --------------------------------------------------
   1. Basis Reset en Variabelen
-------------------------------------------------- */

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

/* CSS-variabelen voor consistentie en makkelijke aanpassingen */
:root {
    --primary-color: #3498DB;
    --primary-color-dark: #1A5276;
    --secondary-color: #2C3E50;
    --accent-color: #E74C3C;
    --background-color: #F9F9F9;
    --light-color: #ECF0F1;
    --text-color: #2C3E50;
    --text-light: #7F8C8D;
    --font-family: 'Roboto', sans-serif;
    --transition-speed: 0.3s;
    --border-radius: 10px;
    --max-width: 1300px;
}

/* Typografie */
body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    font-size: 16px;
    overflow-x: hidden; /* Voorkomt horizontale overloop */
}

html {
    overflow-x: hidden; /* Voorkomt horizontale overloop */
}

/* Responsieve typografie */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.5rem;
}

/* --------------------------------------------------
   2. Algemene Stijlen
-------------------------------------------------- */

/* Links */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

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

/* Containers */
.container {
    width: 90%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 20px 0;
    overflow-x: hidden; /* Extra beveiliging tegen overloop */
}

/* Flex Utility Classes */
.flex {
    display: flex;
}

.flex-center {
    justify-content: center;
    align-items: center;
}

.flex-between {
    justify-content: space-between;
    align-items: center;
}

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

/* Grid Utility Classes */
.grid {
    display: grid;
}

.grid-center {
    justify-content: center;
    align-items: center;
}

.grid-gap-40 {
    gap: 40px;
}

/* Responsieve Container Aanpassing */
@media (max-width: 1024px) {
    .container {
        width: 95%;
    }
}

/* --------------------------------------------------
   3. Header Stijlen
-------------------------------------------------- */

/* Header Styling */
header {
    background-color: #FFFFFF;
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

header.scrolled {
    background-color: #FFFFFF;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.logo-container {
    display: flex;
    align-items: center;
}

.site-title {
    font-size: 2em;
    color: var(--secondary-color);
    margin-left: 10px;
    transition: color var(--transition-speed) ease;
}

nav {
    margin-left: auto;
}

nav ul {
    list-style: none;
    display: flex;
    align-items: center;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    font-size: 1em;
    color: var(--secondary-color);
    font-weight: 500;
    position: relative;
    padding-bottom: 5px;
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0%;
    height: 2px;
    background-color: var(--primary-color);
    left: 0;
    bottom: 0;
    transition: width var(--transition-speed) ease;
}

nav ul li a:hover::after,
nav ul li a:focus::after {
    width: 100%;
}

/* Mobiel menu-toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    outline: none;
}

.hamburger {
    width: 25px;
    height: 3px;
    background-color: var(--secondary-color);
    position: relative;
    transition: transform 0.3s ease;
}

.hamburger::before,
.hamburger::after {
    content: '';
    width: 25px;
    height: 3px;
    background-color: var(--secondary-color);
    position: absolute;
    left: 0;
    transition: transform 0.3s ease;
}

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

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

/* Open/Close menu styles */
.nav-toggle.active .hamburger {
    background-color: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle.active .hamburger::after {
    transform: translateY(-8px) rotate(-45deg);
}

/* Responsive Navigatie */
@media (max-width: 768px) {
    .nav-toggle {
        display: inline-block;
    }

    .main-nav {
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        width: 250px;
        background-color: #FFFFFF;
        transform: translateX(100%);
        transition: transform 0.3s ease-in-out;
        box-shadow: -4px 0 10px rgba(0, 0, 0, 0.1);
        z-index: 1001;
        padding-top: 60px;
        display: flex;
        flex-direction: column;
        align-items: center;
        overflow-y: auto; /* Voorkomt overloop binnen het menu */
    }

    .main-nav.active {
        transform: translateX(0);
    }

    .main-nav ul {
        flex-direction: column;
        width: 100%;
        text-align: center;
    }

    .main-nav ul li {
        margin: 15px 0;
    }

    .main-nav ul li a {
        font-size: 1.2em;
    }
}

@media (max-width: 480px) {
    .main-nav {
        width: 200px;
    }

    .main-nav ul li a {
        font-size: 1em;
    }
}

/* --------------------------------------------------
   4. Hero Sectie
-------------------------------------------------- */

.hero {
    position: relative;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.85), rgba(46, 204, 113, 0.85)),
                url('https://personeelsplanning.software/assets/hero-background.jpg') no-repeat center center/cover;
    padding: 180px 0;
    text-align: center;
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: padding var(--transition-speed) ease;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(44, 62, 80, 0.5);
    z-index: 1;
}

.hero > .container {
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 3.5em;
    margin-bottom: 20px;
    animation: fadeInDown 1s ease-out;
    max-width: 100%; /* Voorkomt overloop */
    word-wrap: break-word; /* Zorgt dat lange woorden breken */
}

.hero p {
    font-size: 1.3em;
    margin-bottom: 40px;
    color: #ECF0F1;
    animation: fadeInUp 1s ease-out;
    max-width: 100%; /* Voorkomt overloop */
    word-wrap: break-word; /* Zorgt dat lange woorden breken */
}

.hero .btn {
    display: inline-block;
    padding: 15px 40px;
    background-color: var(--primary-color);
    color: #FFFFFF;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
    font-size: 1em;
}

.hero .btn:hover,
.hero .btn:focus {
    background-color: var(--primary-color-dark);
    transform: translateY(-3px);
    color: #FFFFFF;
}

/* Animaties */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --------------------------------------------------
   5. Features Sectie
-------------------------------------------------- */

.features {
    padding: 80px 0;
    background-color: #FFFFFF;
}

.features h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.8em;
    color: var(--secondary-color);
    position: relative;
}

.features h2::after {
    content: '';
    width: 80px;
    height: 4px;
    background-color: var(--primary-color);
    position: absolute;
    left: 50%;
    bottom: -15px;
    transform: translateX(-50%);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature-item {
    background-color: var(--light-color);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.feature-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0) 60%);
    transition: transform var(--transition-speed) ease;
}

.feature-item:hover::before {
    transform: rotate(45deg);
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.feature-item h3 {
    margin-bottom: 20px;
    color: var(--secondary-color);
    font-size: 1.8em;
}

.feature-item p {
    font-size: 1em;
    color: var(--text-light);
}

/* --------------------------------------------------
   6. Programs Sectie
-------------------------------------------------- */

.programs {
    padding: 80px 0;
    background-color: #F4F6F8;
}

.programs h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.8em;
    color: var(--secondary-color);
    position: relative;
}

.programs h2::after {
    content: '';
    width: 80px;
    height: 4px;
    background-color: var(--primary-color);
    position: absolute;
    left: 50%;
    bottom: -15px;
    transform: translateX(-50%);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 30px;
    gap: 10px;
}

.filter-btn {
    background-color: var(--light-color);
    color: var(--secondary-color);
    border: none;
    padding: 10px 20px;
    border-radius: 50px;
    cursor: pointer;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
    font-size: 0.95em;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.filter-btn.active,
.filter-btn:hover {
    background-color: var(--primary-color);
    color: #FFFFFF;
    box-shadow: 0 4px 10px rgba(52, 152, 219, 0.3);
}

.program-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    perspective: 1000px; /* Voor 3D-effecten */
}

.program-item {
    background-color: #FFFFFF;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.1);
    transition: transform 0.6s ease, box-shadow 0.6s ease;
    transform-style: preserve-3d;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    text-align: center;
}

.program-item:hover {
    transform: rotateY(10deg) scale(1.05);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

.program-logo {
    width: 120px;
    height: 120px;
    object-fit: contain;
    margin: 20px 0;
    transition: transform var(--transition-speed) ease;
}

.program-item:hover .program-logo {
    transform: scale(1.2);
}

.program-item h3 {
    color: var(--secondary-color);
    font-size: 1.6em;
    margin-bottom: 10px;
}

.program-item p {
    color: var(--text-light);
    font-size: 1em;
    margin-bottom: 20px;
    padding: 0 10px;
}

.program-item .btn {
    background-color: var(--primary-color);
    color: #FFFFFF;
    padding: 10px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease;
    box-shadow: 0 2px 5px rgba(52, 152, 219, 0.3);
}

.program-item .btn:hover,
.program-item .btn:focus {
    background-color: var(--primary-color-dark);
    transform: translateY(-3px);
}

/* --------------------------------------------------
   7. Benefits Sectie
-------------------------------------------------- */

.benefits {
    padding: 80px 0;
    background-color: #FFFFFF;
}

.benefits h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.8em;
    color: var(--secondary-color);
    position: relative;
}

.benefits h2::after {
    content: '';
    width: 80px;
    height: 4px;
    background-color: var(--primary-color);
    position: absolute;
    left: 50%;
    bottom: -15px;
    transform: translateX(-50%);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 40px;
}

.benefit-item {
    background-color: var(--light-color);
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.benefit-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0) 60%);
    transition: transform var(--transition-speed) ease;
}

.benefit-item:hover::before {
    transform: rotate(45deg);
}

.benefit-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.benefit-item i {
    font-size: 3em;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.benefit-item h3 {
    color: var(--secondary-color);
    font-size: 1.4em;
    margin-bottom: 10px;
}

.benefit-item p {
    color: var(--text-light);
    font-size: 1em;
}

/* --------------------------------------------------
   8. Contact Sectie
-------------------------------------------------- */

.contact {
    padding: 80px 0;
    background-color: #FFFFFF;
}

.contact h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2.8em;
    color: var(--secondary-color);
    position: relative;
}

.contact h2::after {
    content: '';
    width: 80px;
    height: 4px;
    background-color: var(--primary-color);
    position: absolute;
    left: 50%;
    bottom: -15px;
    transform: translateX(-50%);
}

.contact p {
    text-align: center;
    margin-bottom: 40px;
    font-size: 1.2em;
    color: var(--text-light);
}

form {
    max-width: 800px;
    margin: 0 auto;
    background-color: #F9F9F9;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-speed) ease;
    overflow-x: hidden; /* Voorkomt overloop in formulieren */
}

form:hover {
    transform: translateY(-5px);
}

.form-group {
    margin-bottom: 25px;
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--secondary-color);
}

.form-group input,
.form-group textarea {
    padding: 15px 20px;
    border: 1px solid #BDC3C7;
    border-radius: var(--border-radius);
    font-size: 1em;
    transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    background-color: #FFFFFF;
    max-width: 100%; /* Voorkomt overloop */
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 10px rgba(52, 152, 219, 0.2);
    outline: none;
}

button.btn {
    width: 100%;
    padding: 15px;
    background-color: var(--primary-color);
    border: none;
    color: #FFFFFF;
    font-size: 1.1em;
    cursor: pointer;
    border-radius: 50px;
    transition: background-color var(--transition-speed) ease, transform 0.2s ease;
    font-weight: 700;
    box-shadow: 0 4px 10px rgba(52, 152, 219, 0.3);
}

button.btn:hover,
button.btn:focus {
    background-color: var(--primary-color-dark);
    transform: translateY(-3px);
}

/* --------------------------------------------------
   9. Modal Styles
-------------------------------------------------- */

.modal {
    display: none; /* Verborgen standaard */
    position: fixed;
    z-index: 3000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(44, 62, 80, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: #FFFFFF;
    margin: auto;
    padding: 30px;
    border: 2px solid var(--primary-color);
    width: 90%;
    max-width: 500px;
    border-radius: 20px;
    text-align: center;
    position: relative;
    animation: fadeInScale 0.5s ease-out;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.close-button {
    color: var(--secondary-color);
    font-size: 28px;
    font-weight: bold;
    position: absolute;
    top: 15px;
    right: 20px;
    cursor: pointer;
    transition: color var(--transition-speed) ease;
}

.close-button:hover,
.close-button:focus {
    color: var(--primary-color);
    text-decoration: none;
}

.alert {
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 10px;
    font-size: 1em;
    color: #FFFFFF;
}

.alert.success {
    background-color: #2ECC71;
}

.alert.error {
    background-color: #E74C3C;
}

.alert.info {
    background-color: var(--primary-color);
}

/* --------------------------------------------------
   10. Footer Stijlen
-------------------------------------------------- */

footer {
    background-color: var(--secondary-color);
    color: #ECF0F1;
    padding: 40px 0;
    text-align: center;
    overflow-x: hidden; /* Voorkomt overloop */
}

footer p {
    margin-bottom: 20px;
    font-size: 1em;
}

footer .social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
}

footer .social-links a {
    color: #ECF0F1;
    font-size: 1.5em;
    transition: color var(--transition-speed) ease;
}

footer .social-links a:hover,
footer .social-links a:focus {
    color: var(--primary-color);
}

/* --------------------------------------------------
   11. Responsiviteit
-------------------------------------------------- */

@media (max-width: 1024px) {
    .features h2,
    .programs h2,
    .benefits h2,
    .contact h2 {
        font-size: 2.5em;
    }

    .hero {
        padding: 120px 0;
    }

    .hero h1 {
        font-size: 2.8em;
    }

    .hero p {
        font-size: 1.1em;
    }

    .feature-grid,
    .program-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }

    nav ul li {
        margin: 15px 0;
    }

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

    .filter-buttons {
        flex-direction: column;
    }

    .filter-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 0;
    }

    .hero h1 {
        font-size: 2.2em;
    }

    .hero p {
        font-size: 1em;
    }

    .site-title {
        font-size: 1.5em;
    }

    .container {
        width: 95%;
    }

    footer .social-links a {
        font-size: 1.2em;
    }
}

/* --------------------------------------------------
   12. Toegankelijkheid en UX Verbeteringen
-------------------------------------------------- */

/* Focus States */
a:focus,
button:focus,
input:focus,
textarea:focus,
.select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Visuele Verbeteringen voor Formulieren */
.form-group input,
.form-group textarea {
    transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 10px rgba(52, 152, 219, 0.2);
}

/* Verbeterde Button Stijlen */
.btn {
    display: inline-block;
    padding: 15px 40px;
    background-color: var(--primary-color);
    color: #FFFFFF;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
    font-size: 1em;
}

.btn:hover,
.btn:focus {
    background-color: var(--primary-color-dark);
    transform: translateY(-3px);
    color: #FFFFFF;
}

/* --------------------------------------------------
   13. Animaties en Overgangen
-------------------------------------------------- */

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Button Hover Animaties */
.button-anim {
    position: relative;
    overflow: hidden;
}

.button-anim::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    top: 0;
    left: -100%;
    transition: all var(--transition-speed) ease;
}

.button-anim:hover::after,
.button-anim:focus::after {
    left: 0;
    transition: all var(--transition-speed) ease;
}

/* --------------------------------------------------
   14. Overige Stijlen
-------------------------------------------------- */

/* Cards Stijlen */
.card {
    background-color: #FFFFFF;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    padding: 20px;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}