* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    background: url('img/Copilot_20260421_003945.png') no-repeat center center fixed;
    background-size: cover;
    height: 100vh;
    display: flex;
    flex-direction: column; /* Damit das Menü oben und der Content mittig ist */
    justify-content: center;
    align-items: center;
    color: white;
    overflow: hidden;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

/* --- NEU: Das Glas-Menü --- */
nav {
    position: fixed;
    top: 20px;
    z-index: 10;
    display: flex;
    gap: 20px;
    padding: 15px 40px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: 50px; /* Abgerundete Pillen-Form */
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

nav a {
    color: white;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #88d9ff;
}

/* --- Container & Content --- */
.container {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 3rem;
    background: rgba(255, 255, 255, 0.07);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
    max-width: 550px;
    width: 90%;
    animation: fadeIn 1s ease-out;
}

.logo {
    width: 100px;
    height: auto;
    margin-bottom: 1rem;
    filter: drop-shadow(0 0 10px rgba(136, 217, 255, 0.5));
}

h1 {
    font-size: 2.8rem;
    letter-spacing: 0.3rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    background: linear-gradient(to right, #ffffff, #88d9ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

p {
    margin-bottom: 2rem;
    font-weight: 300;
}

.btn {
    display: inline-block;
    padding: 12px 35px;
    border: 2px solid #88d9ff;
    color: #88d9ff;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    font-weight: bold;
}

.btn:hover {
    background-color: #88d9ff;
    color: #001a33;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}