/* Vollbild + Dark Neon Background */
body {
    margin: 0;
    height: 100vh;
    overflow: hidden;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-weight: 300;
    background:
        radial-gradient(circle at top left, #00b0ff22, transparent 55%),
        radial-gradient(circle at bottom right, #00e67622, transparent 55%),
        radial-gradient(circle at top, #020617 0, #000814 65%, #00040a 100%);
    animation: fadeIn 1s ease-out;
    color: #ffffff;
}

/* button */
.btn {
    display: inline-block;
    border: 2px solid #e5f9ff;
    background: transparent;
    color: #e5f9ff;
    padding: 0.6rem 2.8rem;
    font-size: 1.1rem;
    border-radius: 999px;
    opacity: 0.8;
    cursor: pointer;
    transition: 0.3s;
    box-shadow: 0 0 18px rgba(0, 176, 255, 0.4);
    text-decoration: none;
}

/* Inhalt in der Mitte */
.center-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.center-content h1 {
    font-size: 2.8rem;
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.center-content p {
    font-size: 1rem;
    color: #cbd5e1;
    margin-bottom: 1.5rem;
}


.center-content button {
    border: 2px solid #e5f9ff;
    background: transparent;
    color: #e5f9ff;
    padding: 0.6rem 2.8rem;
    font-size: 1.1rem;
    border-radius: 999px;
    opacity: 0.8;
    cursor: pointer;
    transition: 0.3s;
    box-shadow: 0 0 18px rgba(0, 176, 255, 0.4);
}

.center-content button:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: #00e676;
    color: #00e676;
    opacity: 1;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.6);
}

/* Leuchtende „Lichter“ */
.light {
    position: absolute;
    width: 8px;
    height: 40px;
    background-color: #e5f9ff;
    box-shadow: 0 0 20px 4px rgba(0, 255, 255, 0.8);
    opacity: 0;
    top: 100vh;
    left: 50%;
}

/* Verschiedene Größen / Positionen / Geschwindigkeiten */
.x1 {
    animation: floatUp 4s linear infinite;
    transform: scale(1.0);
}

.x2 {
    animation: floatUp 7s linear infinite;
    transform: scale(1.6);
    left: 15%;
}

.x3 {
    animation: floatUp 2.5s linear infinite;
    transform: scale(0.5);
    left: -10%;
}

.x4 {
    animation: floatUp 4.5s linear infinite;
    transform: scale(1.2);
    left: -30%;
}

.x5 {
    animation: floatUp 8s linear infinite;
    transform: scale(2.0);
    left: -55%;
}

.x6 {
    animation: floatUp 3s linear infinite;
    transform: scale(0.8);
    left: -80%;
}

.x7 {
    animation: floatUp 5.3s linear infinite;
    transform: scale(2.8);
    left: 35%;
}

.x8 {
    animation: floatUp 4.7s linear infinite;
    transform: scale(1.7);
    left: 60%;
}

.x9 {
    animation: floatUp 4.1s linear infinite;
    transform: scale(1.0);
    left: 82%;
}

/* Aufwärtsbewegung der Lichter */
@keyframes floatUp {
    0%   { top: 100vh; opacity: 0; }
    20%  { opacity: 1; }
    50%  { top: 0vh;  opacity: 0.9; }
    80%  { opacity: 1; }
    100% { top: -100vh; opacity: 0; }
}

/* sanftes Einblenden der Seite */
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.neon-swipe {
    position: fixed;
    inset: 0;
    background: linear-gradient(90deg, #00b0ff, #00e676);
    transform: translateX(-100%);
    z-index: 9999;
    transition: transform 0.6s ease-in-out;
}
.neon-swipe.active {
    transform: translateX(0);
}