:root {
    --primary-blue: #003399;
    --primary-blue-dark: #002266;
    --text-color: #333333;
    --text-light: #666666;
    --bg-white: #ffffff;
    --bg-gray: #f4f6f8;
    --border-color: #e0e0e0;
    --font-family: Arial, sans-serif;
    --container-width: 1100px;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1,
h2,
h3,
h4 {
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: #111;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 2.5rem;
    line-height: 1.2;
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.2rem;
}

#vorstand h4 {
    margin-top: 0 !important;
}

.text-link {
    color: var(--primary-blue);
    font-weight: 600;
}

.text-link:hover {
    text-decoration: underline;
}

.monospace {
    font-family: 'Courier New', Courier, monospace;
    letter-spacing: 1px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary-blue);
    color: white;
}

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

/* Header */
.site-header {
    background-color: var(--bg-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-link {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.main-nav ul {
    display: flex;
    gap: 2rem;
}

.main-nav a {
    font-weight: 500;
    color: var(--text-color);
}

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

/* Sections */
section {
    padding: var(--spacing-sm) 0 var(--spacing-lg) 0;
}

.section-white {
    background-color: var(--bg-white);
}

.section-gray {
    background-color: var(--bg-gray);
}

.section-blue {
    background-color: var(--primary-blue);
    color: white;
}

.section-intro {
    text-align: center;
    max-width: 600px;
    margin: -1rem auto 3rem auto;
    color: var(--text-light);
}

/* Hero */
.hero-section {
    padding: 6rem 0;
    text-align: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Grids */
.grid-2-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.grid-4-col {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

/* Content Blocks */
.highlight-border {
    border-left: 4px solid var(--primary-blue);
    padding-left: 1.5rem;
}

/* Cards */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-body {
    padding: 1.5rem;
    text-align: center;
}

.role {
    display: block;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Investments */
.investment-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.investment-item {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.investment-thanks {
    text-align: right;
    border-left: 1px solid var(--border-color);
    padding-left: 1.5rem;
    min-width: 200px;
}

.investment-thanks span {
    display: block;
    font-size: 0.85rem;
    color: var(--text-light);
}

/* Donation */
.section-blue h2,
.section-blue h3,
.section-blue p,
.section-blue a {
    color: white;
}

.section-blue .text-link {
    text-decoration: underline;
}

.donation-box {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.bank-details {
    margin-top: 1.5rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.8rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 0.4rem;
}

/* Documents */
.doc-list {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.doc-item {
    display: block;
    background-color: #f8f9fa;
    padding: 1rem 1.5rem;
    border-radius: 4px;
    border: 1px solid #e9ecef;
    color: var(--text-color);
    font-weight: 500;
    transition: all 0.2s;
}

.doc-item:hover {
    background-color: #e2e6ea;
    border-color: #dae0e5;
    text-decoration: none;
    transform: translateX(5px);
}

.doc-subgroup {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.doc-indent {
    margin-left: 3rem;
    width: calc(100% - 3rem);
    background-color: #fcfcfc;
}

.contact-info {
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .doc-indent {
        margin-left: 1.5rem;
        width: calc(100% - 1.5rem);
    }
}

/* Footer */
.site-footer {
    background-color: #1a1a1a;
    color: #888;
    padding: 3rem 0;
    text-align: center;
}

.footer-links {
    margin-bottom: 1.5rem;
}

.footer-links a {
    margin: 0 1rem;
    color: #ccc;
}

.footer-links a:hover {
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 1rem;
    }

    .main-nav ul {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .grid-2-col,
    .grid-4-col {
        grid-template-columns: 1fr;
    }

    .investment-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .investment-thanks {
        border-left: none;
        padding-left: 0;
        border-top: 1px solid var(--border-color);
        padding-top: 1rem;
        width: 100%;
        text-align: left;
    }

    h1 {
        font-size: 2rem;
    }
}