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

body {
    background-color: var(--brand-blue);
    color: var(--text-white);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* NAVIGATION */
.nav-container {
    position: fixed;
    top: 0; 
    width: 100%;
    z-index: 1000;
    background: rgba(0, 13, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

/* Checkbox für den Klick-Mechanismus (unsichtbar) */
#nav-toggle {
    display: none;
}

/* Hamburger Icon Design */
.nav-hamburger {
    display: none; /* Standardmäßig auf Desktop aus */
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.nav-hamburger span {
    display: block;
    width: 25px;
    height: 2px;
    background: white;
    margin: 6px 0;
    transition: 0.4s;
}

.nav-links { 
    display: flex; 
    gap: 35px; 
    list-style: none; 
}

.nav-links a {
    color: white; 
    text-decoration: none; 
    font-weight: 600;
    text-transform: uppercase; 
    font-size: 0.8rem; 
    letter-spacing: 2px;
    transition: var(--transition);
}

.nav-links a:hover { 
    color: var(--brand-cyan); 
}

/* MOBILE DROPDOWN LOGIK */
@media (max-width: 850px) {
    .nav-hamburger {
        display: block; /* Hamburger auf Mobile anzeigen */
    }

    .nav-links {
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--brand-blue-dark);
        flex-direction: column;
        gap: 0;
        text-align: center;
        max-height: 0; /* Menü ist standardmäßig eingefahren */
        overflow: hidden;
        transition: max-height 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
        border-bottom: 0px solid var(--glass-border);
    }

    .nav-links li {
        border-bottom: 1px solid var(--glass-border);
    }

    .nav-links a {
        display: block;
        padding: 20px;
        font-size: 0.9rem;
    }

    /* Wenn die Checkbox (nav-toggle) angeklickt wird */
    #nav-toggle:checked ~ .nav-links {
        max-height: 400px; /* Fährt das Menü aus */
        border-bottom: 1px solid var(--glass-border);
    }

    /* Hamburger Animation zum 'X' bei Klick */
    #nav-toggle:checked ~ .nav-hamburger span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
    #nav-toggle:checked ~ .nav-hamburger span:nth-child(2) { opacity: 0; }
    #nav-toggle:checked ~ .nav-hamburger span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }
}

/* HERO SECTION */
.hero-bg {
    min-height: 100vh;
    display: flex; 
    align-items: center; 
    justify-content: center;
    background: linear-gradient(rgba(0, 26, 51, 0.4), var(--brand-blue)), 
                url('hintergrundbild.jpg') no-repeat center center;
    background-size: cover;
    text-align: center;
    padding: 120px 20px 60px;
}

.hero-logo-large {
    max-width: 450px;
    width: 80%;
    margin-bottom: 30px;
    filter: drop-shadow(0 10px 30px rgba(0,0,0,0.5));
}

.hero-date {
    font-family: 'Montserrat', sans-serif;
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 10px;
}

.hero-location {
    color: var(--brand-yellow);
    font-size: 1.4rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 40px;
}

.btn-primary {
    display: inline-block;
    background: var(--brand-cyan);
    color: var(--brand-blue);
    padding: 18px 45px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 10px 25px rgba(0, 212, 255, 0.3);
    transition: var(--transition);
}

.btn-primary:hover { 
    transform: translateY(-3px); 
    background: white; 
}

@media (max-width: 480px) {
    .hero-date { font-size: 1.8rem; }
    .hero-location { font-size: 1.1rem; letter-spacing: 1px; }
}