/* CSS Variablen & Design System */
:root {
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-primary: #0284c7; /* Elektrisches Blau / Türkis Akzent */
    --color-primary-hover: #0369a1;
    --color-border: #e2e8f0;
    --color-card-bg: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --color-bg: #0f172a; /* Dunkles Marineblau / Schwarz */
    --color-surface: #1e293b;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-primary: #38bdf8;
    --color-primary-hover: #0ea5e9;
    --color-border: #334155;
    --color-card-bg: #1e293b;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.3);
}

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

body {
    font-family: 'Inter', sans-serif, system-ui;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
.site-header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.brand-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
}

.logo-accent {
    color: var(--color-primary);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 20px;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text-muted);
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
    color: var(--color-primary);
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.theme-toggle-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text);
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    padding: 80px 0;
    text-align: center;
    background: linear-gradient(135deg, rgba(2, 132, 199, 0.05) 0%, rgba(15, 23, 42, 0.02) 100%);
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background-color: rgba(2, 132, 199, 0.1);
    color: var(--color-primary);
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 20px;
}

.hero-content h1 {
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -0.025em;
}

.hero-content h1 .highlight {
    color: var(--color-primary);
}

.hero-lead {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto 30px auto;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 15px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #ffffff;
}

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

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.875rem;
}

.btn-disabled {
    background-color: var(--color-border);
    color: var(--color-text-muted);
    cursor: not-allowed;
}

/* Grids & Cards */
.section {
    padding: 60px 0;
}

.bg-light {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(480px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.card {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-icon {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.section-header p {
    color: var(--color-text-muted);
}

/* Brand Cards */
.brand-card, .brand-card-full {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.brand-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.brand-header h3 {
    font-size: 1.25rem;
}

.status-badge {
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 600;
    text-transform: uppercase;
}

.status-active {
    background-color: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

.status-building {
    background-color: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

.status-planned {
    background-color: rgba(100, 116, 139, 0.1);
    color: var(--color-text-muted);
}

.brand-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    margin-top: 20px;
}

.brand-link.disabled {
    color: var(--color-text-muted);
    pointer-events: none;
}

/* Category & Pages */
.page-content {
    padding: 40px 0 80px 0;
}

.breadcrumb {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

.breadcrumb a {
    color: var(--color-text-muted);
    text-decoration: none;
}

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

.content-header h1 {
    font-size: 2.25rem;
    margin-bottom: 10px;
}

.subtitle {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

.category-head {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.category-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
}

.sub-brand-item {
    border-top: 1px solid var(--color-border);
    padding-top: 15px;
    margin-top: 15px;
}

.sub-brand-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5px;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: inherit;
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
}

.alert {
    padding: 15px;
    border-radius: 8px;
    background-color: rgba(2, 132, 199, 0.1);
    color: var(--color-primary);
    margin-bottom: 20px;
    font-weight: 500;
}

/* Footer */
.site-footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 20px 0;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3, .footer-col h4 {
    margin-bottom: 20px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--color-primary);
}

.footer-slogan {
    margin-top: 15px;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 20px;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.text-center {
    text-align: center;
}

.mt-4 { margin-top: 30px; }
.mb-4 { margin-bottom: 30px; }

/* Responsive Media Queries */
@media (max-width: 768px) {
    .main-nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        padding: 20px;
        box-shadow: var(--shadow-md);
    }
    
    .main-nav.active {
        display: flex;
    }
    
    .nav-links {
        flex-direction: column;
        width: 100%;
        text-align: center;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .grid-2 {
        grid-template-columns: 1fr;
    }
}