/* Grundlayout */

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #ffffff;
    color: #222222;
    line-height: 1.6;
}

header {
    padding: 60px 20px 40px 20px;
    text-align: center;
    border-bottom: 1px solid #e0e0e0;
}

h1 {
    font-size: 2.4rem;
    margin: 0;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.subtitle {
    margin-top: 10px;
    font-size: 1rem;
    color: #666666;
}

section {
    max-width: 900px;
    margin: 60px auto;
    padding: 0 20px;
}

h2 {
    font-size: 1.6rem;
    margin-bottom: 20px;
    font-weight: 600;
}

h3 {
    margin-top: 40px;
    margin-bottom: 10px;
    font-size: 1.2rem;
    font-weight: 600;
}

p {
    margin-bottom: 20px;
}

ul {
    padding-left: 20px;
}

li {
    margin-bottom: 10px;
}

/* Links */

a {
    color: #003366;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Sprachumschaltung */

.language-switch {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 0.9rem;
}

.language-switch a {
    color: #666666;
}

.language-switch a.active {
    font-weight: 600;
    color: #000000;
}

/* Buttons */

.button {
    display: inline-block;
    padding: 10px 18px;
    margin-right: 15px;
    border: 1px solid #003366;
    color: #003366;
    font-size: 0.9rem;
}

.button:hover {
    background-color: #003366;
    color: #ffffff;
    text-decoration: none;
}

.button.secondary {
    border-color: #999999;
    color: #666666;
}

.button.secondary:hover {
    background-color: #999999;
    color: #ffffff;
}

/* Back link */

.back-link {
    max-width: 900px;
    margin: 20px auto 0 auto;
    padding: 0 20px;
}

.back-link a {
    font-size: 0.9rem;
    color: #666666;
    text-decoration: none;
}

.back-link a:hover {
    text-decoration: underline;
    color: #000000;
}

/* Neue Seitennavigation */

.site-header {
    border-bottom: 1px solid #d9d9d9;
    padding: 0.9rem 1.2rem;
    margin-bottom: 2rem;
    background: #ffffff;
}

.site-header-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.site-title a {
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    color: #111111;
}

.main-nav {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.main-nav a {
    text-decoration: none;
    color: #333333;
    font-size: 0.95rem;
}

.main-nav a:hover,
.main-nav a:focus {
    text-decoration: underline;
}

.page-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.2rem 2rem 1.2rem;
}

.hero {
    margin-bottom: 2.5rem;
}

.hero h1 {
    margin-bottom: 0.8rem;
}

.hero-lead {
    font-size: 1.1rem;
    line-height: 1.6;
}

.hero-actions {
    margin-top: 1.2rem;
}

.image-caption {
    margin-top: 0.8rem;
    font-size: 0.95rem;
    line-height: 1.5;
    text-align: center;
    color: #555555;
}

/* Footer */

footer {
    text-align: center;
    padding: 40px 20px;
    border-top: 1px solid #e0e0e0;
    font-size: 0.9rem;
    color: #666666;
}

/* Responsive */

@media (max-width: 600px) {
    h1 {
        font-size: 2rem;
    }

    section {
        margin: 40px auto;
        padding: 0 16px;
    }

    .language-switch {
        position: static;
        text-align: right;
        padding: 1rem 1rem 0 1rem;
    }

    .site-header {
        padding: 0.8rem 1rem;
    }

    .site-header-inner {
        align-items: flex-start;
    }

    .main-nav {
        gap: 0.8rem;
    }

    .page-content {
        padding: 0 1rem 2rem 1rem;
    }
}

/* Neue Startseite: Hero-Grafik, Klärungsabschnitt und Projektkarte */

.diagram {
    max-width: 1100px;
}

.hero-graphic {
    margin: 2rem auto 0 auto;
}

.hero-graphic img {
    width: 100%;
    max-width: 1100px;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: 18px;
    box-shadow: 0 18px 45px rgba(20, 35, 45, 0.13);
}

.concept-note {
    max-width: 900px;
    margin: 3rem auto;
    padding: 2rem;
    background: #f7f5ef;
    border-left: 4px solid #3f5f73;
    border-radius: 14px;
}

.concept-note h2 {
    margin-top: 0;
}

.concept-note p {
    line-height: 1.7;
}

.project-map {
    max-width: 1100px;
    margin: 4rem auto;
}

.map-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.2rem;
}

.map-card {
    padding: 1.4rem;
    background: #ffffff;
    border: 1px solid #ddd8cf;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(20, 35, 45, 0.06);
}

.map-card h3 {
    margin-top: 0;
    margin-bottom: 0.8rem;
    font-size: 1.15rem;
}

.map-card p {
    margin-bottom: 0;
}

.entry-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem;
    margin: 1.5rem 0 2rem 0;
}

.paper-link {
    display: block;
    padding: 1rem 1.1rem;
    border: 1px solid #ddd8cf;
    border-radius: 14px;
    background: #ffffff;
    text-decoration: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.paper-link:hover,
.paper-link:focus {
    text-decoration: none;
    border-color: #3f5f73;
    box-shadow: 0 8px 24px rgba(20, 35, 45, 0.08);
    transform: translateY(-1px);
}

.paper-link span {
    display: block;
    font-weight: 700;
    color: #003366;
}

.paper-link small {
    display: block;
    margin-top: 0.25rem;
    color: #666666;
    line-height: 1.4;
}

@media (max-width: 760px) {
    .map-grid,
    .entry-links {
        grid-template-columns: 1fr;
    }

    .concept-note {
        padding: 1.4rem;
    }

    .hero-graphic img {
        border-radius: 12px;
    }
}