:root {
    /* Dark Theme - Cloud Native Style */
    --bg-color: #2D3436;
    --surface-color: #353B3C;
    --primary-color: #40C4AA;      /* Mint */
    --secondary-color: #A29BFE;    /* Purple */
    --accent-color: #FFAD60;       /* Amber */
    --text-main: #F0F0F0;
    --text-muted: #B2BEC3;
    --border-color: #4A4A4A;
    --max-width: 900px;
    --font-mono: 'Source Code Pro', 'Fira Code', 'Consolas', monospace;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --radius: 8px;
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Source+Code+Pro:wght@400;500&display=swap');

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

body {
    font-family: var(--font-main);
    background: var(--bg-color);
    color: var(--text-main);
    line-height: 1.7;
    font-size: 16px;
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }

/* Header */
.site-header {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav { display: flex; justify-content: space-between; align-items: center; }
.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-main);
}
.logo:hover { color: var(--primary-color); }
.logo-img {
    height: 36px;
    width: auto;
}
.nav-links { display: flex; list-style: none; gap: 1.5rem; }
.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--primary-color); }
.rss-link {
    color: var(--accent-color) !important;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}
.rss-link::before { content: '📡'; }

/* Hero */
.hero { text-align: center; padding: 4rem 0; }
.hero h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.tagline { color: var(--text-muted); font-size: 1.25rem; margin-bottom: 2rem; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}
.btn-primary {
    background: var(--primary-color);
    color: var(--bg-color);
}
.btn-primary:hover {
    background: #35a892;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}
.btn-secondary {
    border: 2px solid var(--border-color);
    color: var(--text-main);
}
.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Archive Section */
.archive { padding: 3rem 0; }
.archive h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}
.newsletter-list { margin-top: 2rem; }

/* Newsletter Cards */
.newsletter-grid { display: grid; gap: 1.5rem; margin: 2rem 0; }
.newsletter-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: all 0.2s ease;
}
.newsletter-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}
.newsletter-card time {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-family: var(--font-mono);
}
.newsletter-card h3 { margin: 0.75rem 0; font-size: 1.25rem; }
.newsletter-card h3 a { color: var(--text-main); text-decoration: none; }
.newsletter-card h3 a:hover { color: var(--primary-color); }
.newsletter-card p { color: var(--text-muted); margin-top: 0.5rem; }
.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
.tag {
    background: rgba(64, 196, 170, 0.15);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--primary-color);
    font-family: var(--font-mono);
    border: 1px solid rgba(64, 196, 170, 0.3);
}

/* Article / Newsletter Issue */
.newsletter-issue { padding: 3rem 0; }
.issue-header { margin-bottom: 2rem; padding-bottom: 2rem; border-bottom: 1px solid var(--border-color); }
.issue-header time {
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}
.issue-header h1 {
    font-size: 2.5rem;
    margin: 0.5rem 0;
    color: var(--text-main);
}
.summary {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-top: 0.5rem;
}

/* Issue Content */
.issue-content h2 {
    color: var(--primary-color);
    margin: 2.5rem 0 1rem;
    font-size: 1.5rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}
.issue-content h3 {
    margin: 1.5rem 0 0.75rem;
    color: var(--secondary-color);
    font-size: 1.2rem;
}
.issue-content a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}
.issue-content a:hover {
    border-bottom-color: var(--primary-color);
}
.issue-content ul, .issue-content ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}
.issue-content li { margin-bottom: 0.5rem; }
.issue-content p { margin-bottom: 1rem; }
.issue-content strong { color: var(--text-main); }
.issue-content code {
    background: var(--bg-color);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.9rem;
    font-family: var(--font-mono);
    color: var(--accent-color);
}
.issue-content pre {
    background: var(--bg-color);
    padding: 1.25rem;
    border-radius: var(--radius);
    overflow-x: auto;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}
.issue-content pre code {
    background: transparent;
    padding: 0;
    color: var(--text-main);
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
    color: var(--text-muted);
    background: var(--surface-color);
}
.site-footer a { color: var(--primary-color); }
.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
}

/* Navigation */
.issue-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}
.issue-nav a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}
.issue-nav a:hover { text-decoration: underline; }

/* Articles Page */
.issue-content h1 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .nav { flex-direction: column; gap: 1rem; }
    .nav-links { gap: 1rem; }
    .issue-header h1 { font-size: 1.75rem; }
}

/* Static Pages (Impressum, Datenschutz, etc.) */
.page-content {
    padding: 3rem 0;
    max-width: var(--max-width);
    margin: 0 auto;
}

.page-content h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
}

.page-content h2 {
    color: var(--primary-color);
    font-size: 1.75rem;
    margin: 2.5rem 0 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.page-content h3 {
    color: var(--secondary-color);
    font-size: 1.3rem;
    margin: 2rem 0 0.75rem;
}

.page-content h4 {
    color: var(--text-main);
    font-size: 1.1rem;
    margin: 1.5rem 0 0.5rem;
}

.page-content p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.page-content a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.page-content a:hover {
    border-bottom-color: var(--primary-color);
}

.page-content strong {
    color: var(--text-main);
    font-weight: 600;
}

.page-content ul, .page-content ol {
    margin: 1rem 0 1.5rem 1.5rem;
}

.page-content li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
}

.page-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2.5rem 0;
}

/* Address blocks in Impressum */
.page-content p + p {
    margin-top: 0.25rem;
}

.page-content strong + br + br {
    display: block;
    content: "";
    margin-bottom: 1rem;
}

/* Code in static pages */
.page-content code {
    background: var(--bg-color);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.9rem;
    font-family: var(--font-mono);
    color: var(--accent-color);
}

/* Blockquotes */
.page-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    color: var(--text-muted);
    font-style: italic;
}

/* Last updated notice */
.page-content em:last-child {
    display: block;
    margin-top: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}