body {
  background-image: url("images/background.jpg");
  background-size: cover;        /* füllt den Bildschirm */
  background-repeat: no-repeat;  /* kein Kacheln */
  background-attachment: fixed;  /* Parallax-Effekt */
  background-position: center;
}

:root {
    --primary: #0050a0;
    --primary-dark: #003a75;
    --bg: #f5f7fb;
    --text: #1f2933;
    --muted: #6b7280;
    --card-bg: #ffffff;
    --accent: #00a38a;
    --border: #e5e7eb;
    --radius: 10px;
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

/* Header / Navigation */

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 8vw;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.logo-mark {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.logo-text {
    letter-spacing: 0.03em;
}

.nav {
    display: flex;
    gap: 1.2rem;
    font-size: 0.95rem;
}

.nav a {
    text-decoration: none;
    color: var(--muted);
    padding-bottom: 0.1rem;
    border-bottom: 2px solid transparent;
}

.nav a:hover {
    color: var(--primary);
    border-color: var(--primary);
}

/* Hero */

.hero {
    padding: 4rem 8vw 3rem;
    background: radial-gradient(circle at top left, #e0f2ff, #f5f7fb);
}

.hero-inner {
    max-width: 900px;
}

.hero h1 {
    font-size: clamp(2rem, 3vw, 2.6rem);
    margin-bottom: 1rem;
}

.hero p {
    max-width: 650px;
    color: var(--muted);
    margin-bottom: 1.5rem;
}

.btn-primary {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 0.8rem 1.6rem;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 500;
    box-shadow: 0 10px 25px rgba(0, 80, 160, 0.25);
}

.btn-primary:hover {
    background: var(--primary-dark);
}

/* Sections */

.section {
    padding: 3rem 8vw;
}

.section-alt {
    background: #ffffff;
}

.section h2 {
    font-size: 1.6rem;
    margin-bottom: 1.5rem;
}

/* Grid & Cards */

.grid {
    display: grid;
    gap: 1.5rem;
}

@media (min-width: 800px) {
    .grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.4rem;
    border: 1px solid var(--border);
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.04);
}

.card h3 {
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

.card ul {
    list-style: disc;
    padding-left: 1.2rem;
    color: var(--muted);
}

/* About */

.about {
    max-width: 800px;
}

.about p {
    margin-bottom: 0.8rem;
    color: var(--muted);
}

/* Kontakt */

.contact-box {
    margin-top: 1rem;
    padding: 1.2rem 1.4rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: #f9fafb;
}

.contact-box a {
    color: var(--primary);
    text-decoration: none;
}

.contact-box a:hover {
    text-decoration: underline;
}

/* Footer */

.footer {
    padding: 1.5rem 8vw 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--muted);
    border-top: 1px solid var(--border);
    background: #ffffff;