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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    color: #1f2937;
    background: #f8fafc;
    line-height: 1.6;
}

/* TOPBAR */

.topbar {
    position: sticky;
    top: 0;
    z-index: 1000;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;

    padding: 14px 24px;
    background: linear-gradient(90deg,
            #123f6b 0%,
            #165a92 50%,
            #2b78b8 100%);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}

.topbar-logo {
    background: rgba(255, 255, 255, 0.9);
    padding: 6px 12px;
    border-radius: 8px;
}

.topbar-logo img {
    height: 62px;
    width: auto;
    display: block;
}

/* NAV */

.topnav ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 24px;
}

.topnav a {
    position: relative;
    color: #ffffff;
    text-decoration: none;
    font-weight: 700;
    padding: 8px 0;
    transition: color 0.2s ease, opacity 0.2s ease;
}

.topnav a:hover {
    opacity: 0.85;
}

.topnav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 3px;
    border-radius: 999px;
    background: #e97b2c;
    transition: width 0.25s ease;
}

.topnav a:hover::after,
.topnav a.active::after {
    width: 100%;
}

.topnav a.active {
    color: #ffffff;
}

/* HAMBURGER */

.menu-toggle {
    display: none;
    width: 46px;
    height: 46px;
    border: none;
    background: transparent;
    cursor: pointer;
    padding: 0;
    position: relative;
}

.menu-toggle span {
    position: absolute;
    left: 10px;
    width: 26px;
    height: 3px;
    border-radius: 999px;
    background: #ffffff;
    transition: transform 0.25s ease, opacity 0.25s ease, top 0.25s ease;
}

.menu-toggle span:nth-child(1) {
    top: 14px;
}

.menu-toggle span:nth-child(2) {
    top: 22px;
}

.menu-toggle span:nth-child(3) {
    top: 30px;
}

.menu-toggle.active span:nth-child(1) {
    top: 22px;
    transform: rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    top: 22px;
    transform: rotate(-45deg);
}

/* HERO */

.hero-it {
    max-width: 1200px;
    margin: 0 auto;
    padding: 64px 24px;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 40px;
    align-items: center;
}

.hero-it-image img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 20px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}

.hero-it-content h1 {
    font-size: clamp(2.2rem, 4vw, 4rem);
    color: #123f6b;
    margin-bottom: 1rem;
}

.hero-it-content p {
    font-size: 1.1rem;
    max-width: 560px;
}

/* CONTENT SECTIONS */

.content-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 64px 24px;
    scroll-margin-top: 110px;
}

.content-section h2 {
    font-size: 2rem;
    color: #123f6b;
    margin-bottom: 1rem;
}

.content-section p {
    max-width: 800px;
}

/* ALTERNERENDE ACHTERGRONDEN */

.content-section:nth-of-type(even) {
    background: #ffffff;
}

.content-section:nth-of-type(odd) {
    background: #f8fafc;
}

/* MOBIEL */

@media (max-width: 768px) {
    .topbar {
        padding: 12px 18px;
    }

    .topbar-logo img {
        height: 42px;
    }

    .menu-toggle {
        display: block;
        flex-shrink: 0;
        z-index: 1002;
    }

    .topnav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: linear-gradient(180deg,
                #123f6b 0%,
                #165a92 100%);
        display: none;
        padding: 14px 20px 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.12);
    }

    .topnav.open {
        display: block;
    }

    .topnav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
    }

    .topnav a {
        display: block;
        width: 100%;
        padding: 10px 0;
    }

    .hero-it {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 40px 20px;
    }

    .hero-it-content p {
        font-size: 1rem;
    }

    .content-section {
        padding: 48px 20px;
    }
}