/* Globale Stijlen & Reset */
:root {
    --primary-color: #007bff; /* Blauw */
    --primary-hover: #0056b3;
    --accent-color: #28a745; /* Groen */
    --background-light: #f8f9fa; /* Lichtgrijs/Wit */
    --text-dark: #212529; /* Donkergrijs */
    --card-background: #ffffff;
    --shadow-light: 0 4px 12px rgba(0, 0, 0, 0.08);
    --border-radius: 10px;
    --font-family: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background-light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.8em;
}

h2 {
    font-size: 2.2em;
    text-align: center;
    color: var(--primary-color);
}

strong {
    font-weight: 700;
    color: var(--primary-color);
}

/* Knoppen (Buttons) */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--accent-color);
    color: white;
    padding: 8px 15px;
    font-size: 0.9em;
}

.btn-secondary:hover {
    background-color: #1e7e34;
}

.btn-nav {
    padding: 8px 15px;
    font-size: 0.9em;
}

.btn-large {
    padding: 15px 30px;
    font-size: 1.1em;
}

/* Navigatiebalk (Header) */
.navbar {
    background-color: var(--card-background);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--primary-color);
}

.navbar nav a {
    color: var(--text-dark);
    text-decoration: none;
    margin-left: 25px;
    font-weight: 600;
    transition: color 0.3s;
}

.navbar nav a:hover {
    color: var(--primary-color);
}

/* Hero Sectie */
.hero {
    padding: 80px 0;
    text-align: center;
    background: linear-gradient(135deg, var(--background-light) 0%, #d8eaff 100%);
}

.hero-title {
    font-size: 3.5em;
    margin-bottom: 0.2em;
    color: var(--text-dark);
}

.hero-title strong {
    color: var(--accent-color);
}

.hero-subtitle {
    font-size: 1.3em;
    color: #495057;
    margin-bottom: 30px;
}

.search-box {
    display: flex;
    justify-content: center;
    max-width: 600px;
    margin: 30px auto;
    background-color: white;
    border-radius: 50px;
    box-shadow: var(--shadow-light);
    overflow: hidden;
}

.search-box input {
    flex-grow: 1;
    padding: 15px 25px;
    border: none;
    font-size: 1em;
    outline: none;
}

.search-box button {
    border-radius: 0 50px 50px 0;
    padding: 15px 30px;
}

.hero-cta-text {
    margin-top: 20px;
    font-style: italic;
    color: #6c757d;
}

/* Algemene Sectie Stijl */
section {
    padding: 60px 0;
}

hr {
    border: 0;
    height: 1px;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0), rgba(0, 123, 255, 0.3), rgba(0, 0, 0, 0));
    margin: 40px 0;
}


/* Featured Calculators */
.featured-calculators {
    background-color: var(--card-background);
    padding-bottom: 80px;
}

.calculators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.calculator-card {
    background-color: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    border-left: 5px solid var(--accent-color); /* Uniek design touch */
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.calculator-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.calculator-card h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.5em;
}

.calculator-card p {
    margin-bottom: 20px;
    color: #495057;
}

.view-all-cta {
    text-align: center;
    margin-top: 50px;
}

/* Over Ons Sectie */
.about-us {
    background-color: var(--background-light);
}

.about-content {
    display: flex;
    gap: 40px;
    align-items: flex-start;
    margin-top: 40px;
}

.text-block {
    flex: 2;
}

.text-block p {
    margin-bottom: 15px;
    font-size: 1.1em;
}

.features-list {
    flex: 1;
    background-color: var(--card-background);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
}

.features-list h3 {
    color: var(--primary-color);
    border-bottom: 2px solid #e9ecef;
    padding-bottom: 10px;
    margin-top: 0;
}

.features-list ul {
    list-style: none;
    padding-top: 15px;
}

.features-list li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    font-weight: 600;
}

.features-list .icon {
    font-size: 1.2em;
    margin-right: 10px;
    color: var(--accent-color);
}

/* Toepassingen Sectie */
.applications {
    text-align: center;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.app-card {
    background-color: var(--card-background);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    text-align: left;
    transition: all 0.3s ease;
    border-top: 4px solid var(--primary-color);
}

.app-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

.app-card h3 {
    font-size: 1.3em;
    margin-bottom: 10px;
    color: var(--text-dark);
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: white;
    padding: 30px 0;
    font-size: 0.9em;
}

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

.footer-links a {
    color: #adb5bd;
    text-decoration: none;
    margin-left: 20px;
    transition: color 0.3s;
}

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

/* Responsiviteit */
@media (max-width: 992px) {
    .navbar nav {
        display: none; /* Navigatie verbergen op kleinere schermen voor mobiel menu */
    }

    .hero-title {
        font-size: 2.5em;
    }

    .hero {
        padding: 60px 0;
    }

    .search-box {
        flex-direction: column;
        border-radius: 10px;
        box-shadow: none;
    }

    .search-box input {
        border-radius: 10px 10px 0 0;
        border: 1px solid #ced4da;
        margin-bottom: -1px;
    }

    .search-box button {
        border-radius: 0 0 10px 10px;
        width: 100%;
    }

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

    .features-list {
        margin-top: 20px;
    }

    footer .container {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        margin-top: 15px;
    }

    .footer-links a {
        margin: 0 10px;
    }
}