/* CSS Reset und Grundvariablen */
:root {
    --primary-color: #004080;
    --secondary-color: #f7f9fa;
    --accent-color: #d9534f;
    --text-color: #333333;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--secondary-color);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Header */
header {
    background-color: var(--primary-color);
    color: #ffffff;
    padding: 3rem 0;
    text-align: center;
}

header h1 {
    font-size: 2.8rem;
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

header .subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    color: #d1e0e0;
}

/* Navigation - Mobile First Ansatz integriert */
.navbar {
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-links {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-links li {
    padding: 0;
}

.nav-links a {
    display: block;
    padding: 15px 20px;
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--accent-color);
    background-color: #f0f4f8;
}

.hamburger {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
    text-align: center;
    padding: 15px 0;
    font-weight: bold;
    background-color: #fff;
}

#menu-toggle {
    display: none;
}

/* Main Content Layout */
main {
    padding: 4rem 0;
}

.intro {
    text-align: center;
    margin-bottom: 3.5rem;
}

.intro h2 {
    font-size: 2.2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.update-date {
    font-size: 1rem;
    color: #666;
    font-style: italic;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

/* Cards (Inhaltsblöcke) */
.card {
    background: #ffffff;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    border-top: 4px solid var(--primary-color);
}

.card h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid #eee;
    padding-bottom: 0.8rem;
}

.card h4 {
    color: var(--primary-color);
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
}

.card p {
    margin-bottom: 1rem;
}

.card ul {
    list-style-type: none;
    margin-bottom: 1.5rem;
}

.card ul li {
    position: relative;
    padding-left: 30px;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.card ol {
    margin-bottom: 1.5rem;
    padding-left: 20px;
}
.card ol li {
    margin-bottom: 1rem;
}

/* Alert/Hinweis Box */
.alert-box {
    background-color: #fff5f5;
    border-left: 5px solid var(--accent-color);
    padding: 1.5rem;
    margin-top: 2rem;
    border-radius: 0 5px 5px 0;
}

.alert-box p {
    margin-bottom: 0.8rem;
}

.alert-box p:last-child {
    margin-bottom: 0;
}

.alert-box .highlight {
    color: var(--accent-color);
    font-weight: bold;
}

/* Profilbild */
.profile-img {
    float: right;
    margin: 0 0 20px 30px;
    border-radius: 8px;
    max-width: 250px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    border: 3px solid #eee;
}

.clear {
    clear: both;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: #ffffff;
    text-align: center;
    padding: 2.5rem 0;
    margin-top: 4rem;
}

footer a {
    color: #d1e0e0;
    text-decoration: none;
    margin: 0 15px;
    transition: color 0.3s ease;
}

footer a:hover {
    color: #ffffff;
    text-decoration: underline;
}

/* Responsive Design - Media Queries */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    header {
        padding: 2rem 0;
    }
    
    .hamburger {
        display: block;
    }
    
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        text-align: center;
        background-color: #fff;
    }
    
    #menu-toggle:checked + .hamburger + .nav-links {
        display: flex;
    }
    
    .nav-links li {
        width: 100%;
        border-bottom: 1px solid #f0f0f0;
    }
    
    .nav-links a {
        padding: 12px 0;
    }
    
    .grid-container {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .profile-img {
        float: none;
        display: block;
        margin: 0 auto 20px auto;
    }
}