:root {
    --primary: #ffffff;
    --secondary: #e0e0e0;
    --dark: #000000;
    --bg-light: #f8f8f8;

    --accent: #4f7ea8;
    --accent-2: #6ea6c9;

    --card-bg: rgba(255, 255, 255, 0.9);
    --radius: 12px;

    --max-width: 1100px;
    --transition: 0.3s ease;
}

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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg-light);
    color: #222;
    line-height: 1.5;
}

/* Top-Banner */
.top-banner {
    background: #000;
    color: #c30000;
    text-align: center;
    padding: 0.5rem;
    font-size: 1rem;
}
.top-banner u { text-decoration: underline; }

/* ================================ */
/* NAVIGATION (optimiert)           */
/* ================================ */
.nav {
    width: 100%;
    background: #000;
    border-bottom: 1px solid #333;
    display: flex;
    justify-content: center;
    padding: 12px 0;
}

.nav-inner {
    max-width: 900px;
    width: 100%;
    display: flex;
    gap: 24px;
    justify-content: flex-start;
    align-items: center;
}

.nav-inner a {
    color: var(--primary);
    text-decoration: none;
    font-weight: bold;
    font-size: 16px;
    letter-spacing: 0.5px;
    transition: var(--transition);
}
.nav-inner a:hover {
    text-decoration: underline;
}

/* Hero-Bereiche */
.hero, .hero-projektinfo, .hero-teilnehmer {
    width: 100%;
    height: 1120px;
    background-size: cover;
    background-position: center;
    position: relative;
}
.hero-head { background-image: url('../img/header.jpg'); }

/* Hero Overlay */
.hero-overlay {
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.45);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--primary);
    padding: 20px;
}
.hero-overlay-top { justify-content: flex-start; padding-top: 12vh; }

.hero-overlay h1 { font-size: 78px; letter-spacing: 2px; }
.hero-overlay h2 { font-size: 48px; letter-spacing: 2px; }
.hero-overlay p { font-size: 20px; margin-top: 10px; }
.hero-overlay a { color: #a4dafc; font-size: 24px; padding: 10px 5px; }

.hero-overlay .hero-content {
    max-width: 1100px;
    width: 90%;
    margin: 0 auto;
    text-align: center;
}

/* Sektionen */
.section {
    width: 100%;
    max-width: var(--max-width);
    margin: 40px auto;
    padding: 10px;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.card-inner { padding: 25px 30px; }
.card-inner h2, .card-inner h3 { margin: 35px 0 15px 0; }

/* Formulare */
form.contact-form {
    display: grid;
    gap: 12px;
    max-width: 600px;
    background-color: var(--card-bg);
    padding: 16px;
    border-radius: 12px;
}
form.contact-form > div {
    border: 1px solid #d1d9e6;
    border-radius: 10px;
    padding: 10px 12px;
    background-color: var(--card-bg);
    transition: border-color 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
}
form.contact-form > div:focus-within {
    border-color: var(--accent);
    box-shadow: 0 2px 8px rgba(79,126,168,0.18);
}
form.contact-form input,
form.contact-form select,
form.contact-form textarea { border: none; width: 100%; background: transparent; padding: 6px 0; font-size: 14px; }

.btn, .btn-primary {
    border-radius: 10px;
    padding: 9px 14px;
    cursor: pointer;
    font-weight: 700;
}
.btn-primary { background: var(--accent); color: #fff; }

/* Footer */
.footer {
    width: 100%;
    background: var(--dark);
    padding: 20px;
    text-align: center;
}
.footer a {
    color: var(--primary);
    text-decoration: none;
    margin: 0 15px;
    font-size: 14px;
    font-weight: bold;
    transition: var(--transition);
}
.footer a:hover { opacity: 0.6; }

/* Buttons */
.button-black { padding: 12px 18px; background: #000; color: #fff; border: none; cursor: pointer; transition: 0.3s; }
.button-black:hover { background: #222; }

/* Responsive */
@media (max-width: 768px) {
    .hero, .hero-projektinfo, .hero-teilnehmer { height: 1100px; }
    .hero-overlay h1 { font-size: 32px; }
    .hero-overlay h2 { font-size: 28px; }
    .hero-overlay p { font-size: 16px; }
    .hero-overlay a { font-size: 20px; }
}

/* Mobile */
@media (max-width: 600px) {
    .nav-inner {
        flex-wrap: wrap;
        gap: 12px;
        padding: 12px;
    }
    .nav-inner a {
        font-size: 15px;
    }
    .hero-overlay-top { padding-top: 8vh; }
}

@media (max-width: 480px) {
    .hero-overlay h1 { font-size: 28px; }
    .hero-overlay h2 { font-size: 22px; }
    .hero-overlay p { font-size: 16px; }
    .hero-overlay a { font-size: 16px; }
}