:root {
    --bg: #05060a;
    --bg-grad: radial-gradient(circle at top, #1b2330 0, #05060a 52%, #000000 100%);
    --accent: #5fd1ff;
    --accent-soft: rgba(95, 209, 255, 0.15);
    --text-main: #eeeeee;
    --text-muted: #a0a4b0;
    --border-soft: rgba(255, 255, 255, 0.06);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg-grad);
    color: var(--text-main);
}

/* HEADER / NAV */

header {
    width: 100%;
    padding: 16px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(8, 10, 18, 0.88);
    backdrop-filter: blur(14px);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 999;
    border-bottom: 1px solid var(--border-soft);
}

header img {
    height: 40px;
}

nav a {
    color: var(--text-muted);
    margin-left: 22px;
    text-decoration: none;
    font-size: 0.98rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    transition: color 0.2s, opacity 0.2s, border-color 0.2s;
    border-bottom: 1px solid transparent;
    padding-bottom: 3px;
}

nav a:hover {
    color: var(--accent);
    border-color: var(--accent-soft);
}

/* LAYOUT */

.container {
    text-align: center; /* Das ist der wichtigste Befehl! Er zentriert Bild, Text und Footer */
    max-width: 900px;   /* Optional: Damit der Text auf großen Bildschirmen nicht zu breit läuft */
    margin: 0 auto;     /* Optional: Zentriert die ganze Box in der Mitte des Bildschirms */
    padding-top: 50px;  /* Optional: Etwas Abstand zum Menü oben */
}

.hero-center {
    text-align: center;
}

h1 {
    font-size: 2.7rem;
    margin-bottom: 18px;
}

p {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-muted);
}

/* CARDS */

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.card {
    background: rgba(12, 14, 24, 0.96);
    border-radius: 16px;
    padding: 20px 22px;
    border: 1px solid var(--border-soft);
    box-shadow: 0 18px 40px rgba(0,0,0,0.55);
}

.card h2 {
    margin-top: 0;
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-soft);
    margin-bottom: 10px;
}

/* BUTTON */

.btn {
    display: inline-block;
    margin-top: 14px;
    padding: 8px 18px;
    border-radius: 999px;
    border: 1px solid var(--accent);
    color: var(--accent);
    text-decoration: none;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

.btn:hover {
    background: var(--accent);
    color: #05060a;
    box-shadow: 0 0 18px rgba(95,209,255,0.55);
}

/* FOOTER */

.footer {
    margin-top: 60px;
    padding: 30px;
    text-align: center;
    color: #777;
    font-size: 0.9rem;
}

/* RESPONSIVE */

@media (max-width: 720px) {
    header {
        padding: 12px 16px;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    nav a {
        margin-left: 10px;
        font-size: 0.85rem;
    }
    .container {
        margin-top: 150px;
        padding: 16px;
    }
    h1 {
        font-size: 2.1rem;
    }
}