:root {
    --bg-color: #ffffff;
    --text-color: #ffffff;
    --footer-bg: rgba(255, 255, 255, 0.1);
    --footer-text: #ffffff;
    --theme-gradient: radial-gradient(circle, rgba(63,94,251,1) 0%, rgba(252,70,107,1) 100%);
}

.theme-immerblei {
    --theme-gradient: radial-gradient(circle, rgba(63,94,251,1) 0%, rgba(252,70,107,1) 100%);
}

.theme-jadwigo {
    --theme-gradient: radial-gradient(circle, rgba(57,164,71,1) 0%, rgba(60,201,203,1) 47%, rgba(87,192,159,1) 100%);
}

.theme-lodewijk {
    --theme-gradient: radial-gradient(circle, rgba(131,58,180,1) 0%, rgba(253,29,29,1) 50%, rgba(252,250,69,1) 100%);
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    background: var(--theme-gradient);
    background-attachment: fixed;
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.hero {
    height: 50vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.logo-container {
    max-width: 600px;
    width: 100%;
    display: flex;
    justify-content: center;
}

#logo {
    max-height: 40vh;
    max-width: 100%;
    height: auto;
    filter: brightness(0) invert(1);
}

.content-section {
    padding: 3rem 1rem;
    text-align: center;
}

ul.icons {
    list-style: none;
    padding: 0;
    margin: 2rem 0;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

ul.icons li a {
    color: inherit;
    text-decoration: none;
    font-size: 2rem;
    transition: transform 0.2s;
    display: inline-flex;
    align-items: center;
}

ul.icons li a:hover {
    transform: scale(1.1);
}

ul.icons li .label {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.bi {
    width: 1em;
    height: 1em;
    vertical-align: -0.125em;
    fill: currentColor;
}

footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 2rem;
    text-align: center;
    backdrop-filter: blur(5px);
}

footer p {
    margin: 0;
}

footer a {
    color: inherit;
    text-decoration: none;
    font-weight: bold;
}

.vcard .fn {
    unicode-bidi: isolate;
}