/* =================================
   CSS Variables - Color Palette
   ================================= */
:root {
    /* Primary Colors - Logo Gold/Yellow Theme */
    --color-primary: #FDB813; /* Logo Gold */
    --color-primary-dark: #E6A500;
    --color-primary-light: #FFCA3A;

    /* Neutral Colors */
    --color-dark: #1A1A1A;
    --color-dark-secondary: #2D2D2D;
    --color-gray: #4A4A4A;
    --color-gray-light: #6B6B6B;
    --color-gray-lighter: #A0A0A0;
    --color-light: #F5F5F5;
    --color-white: #FFFFFF;

    /* Accent Colors - Energy Blue */
    --color-tech-blue: #0EA5E9; /* Sky Blue */
    --color-success: #FDB813;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Roboto Mono', monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
}

/* =================================
   Reset & Base Styles
   ================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--color-dark);
    line-height: 1.6;
    background-color: var(--color-white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

/* =================================
   Typography
   ================================= */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-sm);
}

/* =================================
   Container & Layout
   ================================= */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-xl) 0;
}

/* =================================
   Navigation
   ================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all var(--transition-normal);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.nav-logo img {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--color-white);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 2px;
    background: var(--color-primary);
    transition: transform var(--transition-normal);
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-link:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.nav-link-highlight {
    color: var(--color-primary) !important;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.nav-link-highlight::after {
    display: none;
}

.nav-link-highlight:hover {
    background: var(--color-primary);
    color: var(--color-dark) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-white);
    transition: all var(--transition-fast);
}

/* =================================
   Hero Section
   ================================= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-secondary) 100%);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.animated-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(253, 184, 19, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(253, 184, 19, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
    opacity: 0.3;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: var(--spacing-md);
}

.hero-logo {
    margin-bottom: var(--spacing-md);
    background: rgba(255, 255, 255, 0.95);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2), 0 0 60px rgba(253, 184, 19, 0.2);
    display: inline-block;
    animation: heroLogoPulse 3s ease-in-out infinite;
}

@keyframes heroLogoPulse {
    0%, 100% {
        box-shadow: 0 8px 32px rgba(0,0,0,0.2), 0 0 60px rgba(253, 184, 19, 0.2);
    }
    50% {
        box-shadow: 0 8px 40px rgba(0,0,0,0.3), 0 0 80px rgba(253, 184, 19, 0.4);
    }
}

.hero-logo-img {
    height: 180px;
    width: auto;
    display: block;
}

.hero-title {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
    letter-spacing: -1px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.hero-subtitle {
    color: var(--color-gray-lighter);
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-arrow {
    width: 30px;
    height: 50px;
    border: 2px solid var(--color-primary);
    border-radius: 20px;
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: scrollDown 2s infinite;
}

@keyframes scrollDown {
    0% { top: 10px; opacity: 1; }
    100% { top: 30px; opacity: 0; }
}

/* =================================
   Buttons
   ================================= */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 107, 53, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-secondary:hover {
    background: var(--color-white);
    color: var(--color-dark);
    transform: translateY(-2px);
}

.btn-accent {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
    position: relative;
}

.btn-accent:hover {
    background: var(--color-primary);
    color: var(--color-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(253, 184, 19, 0.3);
}

.beta-badge {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-dark);
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    margin-left: 0.5rem;
    vertical-align: middle;
}

.btn-secondary .beta-badge {
    background: var(--color-white);
    color: var(--color-dark);
}

.btn-secondary:hover .beta-badge {
    background: var(--color-dark);
    color: var(--color-white);
}

.btn-csv-tool {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-csv-tool svg {
    width: 1.6em;
    height: 1.6em;
}

.btn-csv-tool:hover {
    background: var(--color-white);
    color: var(--color-dark);
    transform: translateY(-2px);
}

/* =================================
   Section Headers
   ================================= */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-label {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-mono);
}

.section-header h2 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    color: var(--color-gray);
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.1rem;
}

/* =================================
   About Section
   ================================= */
.about {
    background: var(--color-white);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.about-text h3 {
    color: var(--color-dark);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.about-text h4 {
    color: var(--color-primary);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.about-text p {
    color: var(--color-gray);
    line-height: 1.8;
}

.about-text strong {
    color: var(--color-dark);
}

.about-features {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-md);
}

.about-features li {
    color: var(--color-gray);
    margin-bottom: var(--spacing-xs);
    position: relative;
    padding-left: var(--spacing-md);
}

.about-features li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.about-cta {
    font-weight: 600;
    color: var(--color-dark);
    font-size: 1.1rem;
    margin-top: var(--spacing-md);
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.stat-card {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    text-align: center;
    color: var(--color-white);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

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

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* =================================
   Services Section
   ================================= */
.services {
    background: var(--color-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    position: relative;
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.service-card.featured {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, rgba(253, 184, 19, 0.05) 0%, var(--color-white) 100%);
}

.service-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.service-icon svg {
    width: 30px;
    height: 30px;
}

.service-card h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-xs);
    font-size: 1rem;
}

.service-card > p {
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

.service-list {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-sm);
}

.service-list li {
    color: var(--color-gray);
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-md);
    position: relative;
    font-size: 0.9rem;
}

.service-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.service-footer {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-light);
}

.service-link {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.service-link:hover {
    color: var(--color-primary-dark);
    transform: translateX(5px);
    display: inline-block;
}

/* =================================
   Partners Section
   ================================= */
.partners {
    background: var(--color-white);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.partner-item {
    background: var(--color-white);
    border: 2px solid var(--color-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-normal);
    min-height: 140px;
    text-align: center;
}

.partner-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.partner-logo {
    max-width: 100%;
    max-height: 80px;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: grayscale(20%) opacity(0.9);
    transition: all var(--transition-normal);
}

.partner-item:hover .partner-logo {
    filter: grayscale(0%) opacity(1);
    transform: scale(1.05);
}

.partner-icon {
    font-size: 2.5rem;
    filter: grayscale(30%);
    transition: filter var(--transition-fast);
}

.partner-item:hover .partner-icon {
    filter: grayscale(0%);
}

.partner-name {
    color: var(--color-dark);
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.4;
}

/* =================================
   Projects Section (Legacy - kann entfernt werden)
   ================================= */
.projects {
    background: var(--color-white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 1px solid var(--color-light);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    aspect-ratio: 16/9;
    background: var(--color-light);
    overflow: hidden;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-gray-lighter) 0%, var(--color-gray-light) 100%);
}

.project-placeholder svg {
    width: 60px;
    height: 60px;
    color: var(--color-white);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-content {
    padding: var(--spacing-md);
}

.project-content h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-xs);
    font-size: 1.25rem;
}

.project-category {
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project-description {
    color: var(--color-gray);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* =================================
   Contact Section
   ================================= */
.contact {
    background: var(--color-light);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-card {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-card h3 {
    color: var(--color-dark);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.contact-card p {
    color: var(--color-gray);
    font-size: 0.95rem;
    line-height: 1.6;
}

.contact-card a {
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

.contact-card a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Contact card as link (for address/Google Maps) */
a.contact-card-link {
    text-decoration: none;
    display: block;
    cursor: pointer;
}

a.contact-card-link h3,
a.contact-card-link p {
    color: inherit;
}

a.contact-card-link h3 {
    color: var(--color-dark);
}

a.contact-card-link p {
    color: var(--color-gray);
}

a.contact-card-link:hover {
    border-color: var(--color-primary);
}

a.contact-card-link:hover h3 {
    color: var(--color-primary);
}

.emergency-note {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-light);
}

.emergency-note strong {
    color: var(--color-primary);
}

.emergency-note small {
    font-size: 0.85rem;
    color: var(--color-gray-light);
    font-style: italic;
}

.contact-form-wrapper {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    color: var(--color-dark);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    padding: 0.8rem;
    border: 2px solid var(--color-light);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: var(--color-white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-message {
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    display: none;
}

.form-message.success {
    background: rgba(0, 196, 140, 0.1);
    color: var(--color-success);
    border: 2px solid var(--color-success);
    display: block;
}

.form-message.error {
    background: rgba(255, 107, 53, 0.1);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    display: block;
}

/* =================================
   Footer
   ================================= */
.footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-logo img {
    height: 60px;
    width: auto;
    opacity: 0.8;
}

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

.footer-text p {
    color: var(--color-gray-lighter);
    font-size: 0.9rem;
    margin: 0;
}

/* =================================
   Responsive Design
   ================================= */
@media (max-width: 968px) {
    .about-content {
        grid-template-columns: 1fr;
    }

    .about-stats {
        flex-direction: row;
        justify-content: space-around;
    }

    .stat-card {
        flex: 1;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .contact-info {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .contact-card {
        flex: 1;
        min-width: 200px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(26, 26, 26, 0.98);
        width: 100%;
        text-align: center;
        transition: left var(--transition-normal);
        box-shadow: 0 10px 27px rgba(0,0,0,0.3);
        padding: var(--spacing-md) 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        flex-direction: column;
    }

    .contact-info {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-logo {
        padding: 0.75rem 1rem;
    }

    .hero-logo-img {
        height: 120px;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    section {
        padding: var(--spacing-md) 0;
    }
}

/* =================================
   Energiewende Section - SolarEdge Stats
   ================================= */
.energiewende {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.energiewende::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(253, 184, 19, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(253, 184, 19, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}

.energiewende .section-header h2,
.energiewende .section-header p {
    color: var(--color-white);
}

.energiewende .section-header p {
    color: var(--color-gray-lighter);
}

.energiewende-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.energy-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(253, 184, 19, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(20px);
}

.energy-card.visible,
.energy-card.loaded {
    opacity: 1;
    transform: translateY(0);
}

.energy-card:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-primary);
    transform: translateY(-5px);
}

.energy-card-large {
    grid-column: span 3;
    background: linear-gradient(135deg, rgba(253, 184, 19, 0.15) 0%, rgba(253, 184, 19, 0.05) 100%);
    border-color: var(--color-primary);
    padding: var(--spacing-lg);
}

.energy-card-highlight {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.15) 0%, rgba(14, 165, 233, 0.05) 100%);
    border-color: var(--color-tech-blue);
}

.energy-card-highlight:hover {
    border-color: var(--color-tech-blue);
}

.energy-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-sm);
    color: var(--color-white);
    font-size: 1.5rem;
}

.energy-icon svg {
    width: 24px;
    height: 24px;
}

.energy-card-large .energy-icon {
    width: 56px;
    height: 56px;
    font-size: 1.75rem;
}

.energy-card-large .energy-icon svg {
    width: 28px;
    height: 28px;
}

.energy-card-highlight .energy-icon {
    background: linear-gradient(135deg, var(--color-tech-blue) 0%, #0284c7 100%);
}

.energy-value {
    margin-bottom: var(--spacing-xs);
}

.energy-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-white);
    line-height: 1;
    transition: color var(--transition-fast);
}

.energy-card-large .energy-number {
    font-size: 4rem;
    color: var(--color-primary);
}

.energy-number.updated {
    color: var(--color-primary);
}

.energy-unit {
    font-size: 1.2rem;
    color: var(--color-gray-lighter);
    margin-left: 0.25rem;
}

.energy-card-large .energy-unit {
    font-size: 1.5rem;
}

.energy-label {
    color: var(--color-white);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0;
}

.energy-sublabel {
    color: var(--color-gray-lighter);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
}

/* Timeline Cards */
.energy-timeline {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.timeline-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: center;
    min-width: 180px;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-normal);
}

.timeline-card.visible,
.timeline-card.loaded {
    opacity: 1;
    transform: translateY(0);
}

.timeline-card:hover {
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.08);
}

.timeline-period {
    color: var(--color-gray-lighter);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.timeline-value {
    color: var(--color-white);
    font-size: 1.5rem;
    font-weight: 600;
}

.timeline-value span {
    color: var(--color-primary);
}

/* Footer */
.energy-footer {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.energy-update {
    color: var(--color-gray-lighter);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.update-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.update-dot.error {
    background: var(--color-primary);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.energy-error {
    color: var(--color-primary);
}

.energy-source {
    color: var(--color-gray-light);
    font-size: 0.8rem;
    margin: 0;
}

/* Responsive Energiewende */
@media (max-width: 968px) {
    .energiewende-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .energy-card-large {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .energiewende-grid {
        grid-template-columns: 1fr;
    }

    .energy-card-large {
        grid-column: span 1;
    }

    .energy-card-large .energy-number {
        font-size: 3rem;
    }

    .energy-timeline {
        flex-direction: column;
        align-items: center;
    }

    .timeline-card {
        width: 100%;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .energy-number {
        font-size: 2rem;
    }

    .energy-card-large .energy-number {
        font-size: 2.5rem;
    }
}

/* =================================
   Logo Styles
   ================================= */
.nav-logo {
    background: rgba(255, 255, 255, 0.95);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-md);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all var(--transition-fast);
}

.nav-logo:hover {
    box-shadow: 0 4px 16px rgba(253, 184, 19, 0.3);
    transform: translateY(-2px);
}

.logo-img {
    height: 60px;
    width: auto;
    display: block;
    transition: all var(--transition-fast);
}

.logo-img:hover {
    transform: scale(1.05);
}

/* =================================
   Extended Footer
   ================================= */
.footer {
    background: var(--color-dark);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    color: var(--color-gray-lighter);
}

.footer-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-dark-secondary);
}

.footer-logo-img {
    height: 70px;
    width: auto;
    margin-bottom: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-md);
}

.footer-info h4 {
    color: var(--color-primary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.footer-info p {
    font-size: 0.9rem;
    line-height: 1.8;
    margin: 0;
}

.footer-info a {
    color: var(--color-gray-lighter);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-md);
}

.footer-bottom p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--color-gray-lighter);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--color-gray-lighter);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* =================================
   Cookie Banner
   ================================= */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(26, 26, 26, 0.98);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    box-shadow: 0 -4px 20px rgba(0,0,0,0.3);
    z-index: 9999;
    transform: translateY(100%);
    transition: transform var(--transition-normal);
    border-top: 2px solid var(--color-primary);
}

.cookie-banner.show {
    transform: translateY(0);
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.cookie-icon {
    font-size: 2.5rem;
    animation: cookieBounce 2s ease-in-out infinite;
}

@keyframes cookieBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.cookie-text {
    flex: 1;
    min-width: 300px;
}

.cookie-text h3 {
    color: var(--color-white);
    font-size: 1.2rem;
    margin: 0 0 var(--spacing-xs) 0;
}

.cookie-text p {
    color: var(--color-gray-lighter);
    font-size: 0.9rem;
    line-height: 1.6;
    margin: 0;
}

.cookie-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.cookie-actions .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    white-space: nowrap;
}

/* =================================
   Utility Classes
   ================================= */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-gray { color: var(--color-gray); }
.mb-0 { margin-bottom: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }

/* =================================
   Responsive - Footer & Cookie
   ================================= */
@media (max-width: 768px) {
    .footer-info {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .cookie-content {
        flex-direction: column;
        text-align: center;
    }

    .cookie-actions {
        width: 100%;
        justify-content: center;
    }

    .cookie-actions .btn {
        flex: 1;
        min-width: 120px;
    }
}