body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #fff;
    color: #000;

    display: flex;
    flex-direction: column;
    align-items: center;
    /* horizontaal centreren */
    /* GEEN justify-content: center, want dan centreer je ook verticaal */
    min-height: 100vh;
}

main {
    width: 100%;
    max-width: 800px;
    padding: 2rem;
    box-sizing: border-box;

    /* inhoud links en rechts centreren */
    display: flex;
    flex-direction: column;
    align-items: center;

    /* GEEN justify-content: center, zodat alles gewoon van boven naar beneden gaat */
    text-align: center;
}

header,
footer {
    width: 100%;
    max-width: 800px;
    /* max breedte voor content */
    background: #FFFFFF;
    padding: 1rem;
    border-bottom: 1px solid #CCC;
    box-sizing: border-box;
    text-align: center;
}

header h1 {
    font-size: 4rem;
    margin-left: 20;
}

footer {
    border-top: 1px solid #CCC;
    border-bottom: none;
    color: #555;
    margin-top: auto;
    /* footer helemaal onderaan */
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    /* ruimte tussen logo en tekst */
    margin-bottom: 0.5rem;
}

.store-links {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 -2px 10px rgba(0,0,0,0.15);
    z-index: 1000;
    flex-wrap: wrap; /* zorgt dat grote afbeeldingen naar volgende regel gaan indien nodig */
    box-sizing: border-box;
}

/* Knoppen */
.store-links img {
    height: 60px; /* past op kleine schermen */
    max-width: 45%; /* twee knoppen naast elkaar */
    object-fit: contain;
    transition: transform 0.3s ease;
}

.store-links img:hover {
    transform: scale(1.05);
}

.app-icon {
    width: 60vw;
    height: 60vw;
    max-width: 170px;
    max-height: 170px;
    border-radius: 20%;
    object-fit: cover;
    margin-bottom: 40px;
    box-shadow:
        0 15px 40px rgba(0, 0, 0, 0.3),
        0 30px 70px rgba(108, 160, 209, 0.4);
}

nav a {
    color: #007AFF;
    margin: 0 1rem;
    text-decoration: none;
    font-weight: 500;
}



.navbar {
    display: flex;
    justify-content: center;
    gap: 1rem;
    padding: 0.5rem;
    background-color: #F9F9F9;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    margin-top: 0.5rem;
    flex-wrap: wrap;
}

.navbar a {
    background-color: #E5E5EA;
    color: #007AFF;
    text-decoration: none;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    transition: background-color 0.3s ease, color 0.3s ease;
    font-weight: 500;
}

.navbar a:hover {
    background-color: #fff;
    color: gray;
}

.screenshot-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.screenshot-tabs button {
    padding: 0.5rem 1rem;
    border: none;
    background-color: #E5E5EA;
    color: #007AFF;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.screenshot-tabs button:hover {
    background-color: #fff;
    color: gray;
}

.screenshot-group {
    display: none;
    text-align: center;
}

.screenshot-group.visible {
    display: block;
}

.screenshot-row {
    display: flex;
    flex-direction: row;
    gap: 1rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.screenshot-row img {
    flex: 0 0 auto;
    width: 180px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease;
}


.screenshot-row img:hover {
    transform: scale(1.03);
}

.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  height: 0;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}


.video-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
}

.video-links a img {
    width: 32px;
    height: 32px;
    border-radius: 5px;
    transition: transform 0.3s;
}

.video-links a img:hover {
    transform: scale(1.1);
}



.video-platform-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.video-platform-tabs button {
    padding: 0.5rem 1rem;
    background-color: #e5e5ea;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    color: #007aff;
    transition: 0.2s ease;
}

.video-platform-tabs button:hover {
    background-color: #fff;
    color: #333;
}

.video-links-group {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 10px;
}

.video-platform-tabs button.active {
    background-color: #007aff;
    color: white;
    font-weight: bold;
    border-radius: 6px;
    box-shadow: 0 2px 6px rgba(0, 122, 255, 0.3);
}

.controls-box {
    background: #F9F9F9; /* Crèmekleurig transparant */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
    
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15); /* zachte schaduw */
    padding: 15px;
    margin-bottom: 20px;
    width: 80%;
    max-width: 600px; /* zelfde als .chart max-width */
    margin: 20px auto;
}

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

.controls input,
.controls select {
    margin-bottom: 10px;
    flex: 1 1 45%;
    padding: 8px;
    border-radius: 10px;
    border: 1px solid #ccc;
    background-color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

/* Grafiek-container */
.chart {
    width: 100%;
    height: 300px;
    max-width: 600px;
    margin: 20px auto;
    background: #F9F9F9;
    /* crèmekleurige achtergrond */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
   
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.15);
    margin-bottom: 20px;
}

/* Voor grotere schermen (desktop) terug naar normale styling */
@media (min-width: 768px) {
    .store-links {
        position: static;
        padding: 0;
        background: transparent;
        box-shadow: none;
        gap: 1rem;
        flex-wrap: nowrap;
    }

    .store-links img {
        height: 140px;
        max-width: none;
    }
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: #1C1C1E;
        color: #FFFFFF;
    }

    header,
    footer {
        background-color: #1C1C1E;
        color: #FFFFFF;
        border-color: #333;
    }

    nav a {
        color: #0A84FF;
    }
}