/* Volkena Landing Page - Frontend Styles (German Technology Theme) */

:root {
    --vlp-primary: #003d5c;
    --vlp-secondary: #0066a1;
    --vlp-accent: #00a896;
    --vlp-text: #2c3e50;
    --vlp-background: #ffffff;
    --vlp-light-bg: #f8f9fa;
    --vlp-footer-bg: #1a2332;
}

.vlp-landing-page {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--vlp-text);
    background: var(--vlp-background);
    position: relative;
    overflow-x: hidden;
}

/* Header Section */
.vlp-header {
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.vlp-header.scrolled {
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.vlp-header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 80px;
}

.vlp-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.vlp-logo:hover {
    opacity: 0.8;
}

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

.vlp-nav {
    display: flex;
    align-items: center;
    gap: 35px;
}

.vlp-nav-link {
    color: var(--vlp-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    position: relative;
    padding: 8px 0;
    transition: color 0.3s ease;
}

.vlp-nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--vlp-accent);
    transition: width 0.3s ease;
}

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

.vlp-nav-link:hover::after {
    width: 100%;
}

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

.vlp-nav-link.active::after {
    width: 100%;
}

.vlp-header-cta {
    padding: 10px 24px;
    background: var(--vlp-accent);
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.vlp-header-cta:hover {
    background: var(--vlp-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,102,161,0.3);
    color: #fff;
}

.vlp-mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--vlp-primary);
}

.vlp-mobile-menu-toggle svg {
    width: 28px;
    height: 28px;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .vlp-nav {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 20px;
        box-shadow: 0 8px 16px rgba(0,0,0,0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .vlp-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .vlp-nav-link {
        padding: 12px 0;
        border-bottom: 1px solid #f0f0f0;
    }

    .vlp-header-cta {
        margin-top: 10px;
        justify-content: center;
    }

    .vlp-mobile-menu-toggle {
        display: block;
    }
}

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

/* Hero Section - Modern German Technology Design */
.vlp-hero-section {
    background: linear-gradient(135deg, var(--vlp-primary) 0%, var(--vlp-secondary) 100%);
    color: #fff;
    padding: 120px 0;
    text-align: center;
    margin-bottom: 80px;
    position: relative;
    overflow: hidden;
}

.vlp-hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/hero-background.svg');
    background-size: cover;
    background-position: center;
    opacity: 1;
    z-index: 0;
}

.vlp-hero-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.1));
    z-index: 1;
}

.vlp-hero-container {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

.vlp-hero-title {
    font-size: 56px;
    font-weight: 700;
    margin: 0 0 24px;
    line-height: 1.1;
    letter-spacing: -0.02em;
    position: relative;
    z-index: 1;
}

.vlp-hero-subtitle {
    font-size: 22px;
    font-weight: 400;
    margin: 0;
    opacity: 0.95;
    position: relative;
    z-index: 1;
    letter-spacing: 0.01em;
}

/* Products Section */
.vlp-products-section {
    padding: 40px 0 80px;
}

.vlp-products-grid-frontend {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.vlp-product-item {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(0,0,0,0.06);
    position: relative;
}

.vlp-product-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--vlp-primary), var(--vlp-accent));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.vlp-product-item:hover {
    transform: translateY(-12px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}

.vlp-product-item:hover::before {
    opacity: 1;
}

.vlp-product-image-wrapper {
    width: 100%;
    height: 250px;
    overflow: hidden;
    background: #f8f8f8;
    display: flex;
    align-items: center;
    justify-content: center;
}

.vlp-product-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.vlp-product-item:hover .vlp-product-image {
    transform: scale(1.05);
}

.vlp-product-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.vlp-product-content {
    padding: 25px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.vlp-product-title {
    font-size: 20px;
    font-weight: 600;
    margin: 0 0 12px;
    color: #1a1a1a;
    line-height: 1.3;
}

.vlp-product-description {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin: 0 0 20px;
    flex: 1;
}

.vlp-product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid #f0f0f0;
}

.vlp-product-price {
    font-size: 28px;
    font-weight: 700;
    color: var(--vlp-primary);
    font-family: 'Inter', sans-serif;
}

.vlp-currency {
    font-size: 20px;
    margin-right: 3px;
    font-weight: 600;
}

.vlp-product-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--vlp-accent);
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.02em;
    text-transform: uppercase;
    font-size: 12px;
}

.vlp-product-button:hover {
    background: var(--vlp-secondary);
    transform: translateX(4px);
    color: #fff;
    box-shadow: 0 4px 12px rgba(0,102,161,0.3);
}

.vlp-product-button svg {
    transition: transform 0.3s ease;
}

.vlp-product-button:hover svg {
    transform: translateX(4px);
}

/* No Products */
.vlp-no-products {
    text-align: center;
    padding: 80px 20px;
    color: #999;
}

.vlp-no-products h3 {
    font-size: 24px;
    margin: 20px 0 10px;
    color: #666;
}

.vlp-no-products p {
    font-size: 16px;
    margin: 0;
}

/* CTA Section */
.vlp-cta-section {
    background: linear-gradient(135deg, var(--vlp-primary) 0%, var(--vlp-secondary) 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.vlp-cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.vlp-cta-title {
    font-size: 42px;
    font-weight: 700;
    margin: 0 0 20px;
    position: relative;
    z-index: 1;
    letter-spacing: -0.01em;
}

.vlp-cta-text {
    font-size: 20px;
    margin: 0 0 35px;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

.vlp-cta-button {
    display: inline-block;
    padding: 16px 48px;
    background: #fff;
    color: var(--vlp-primary);
    text-decoration: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 700;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    position: relative;
    z-index: 1;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    font-size: 14px;
}

.vlp-cta-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.25);
    color: var(--vlp-secondary);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .vlp-products-grid-frontend {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .vlp-hero-title {
        font-size: 36px;
    }

    .vlp-hero-subtitle {
        font-size: 18px;
    }

    .vlp-products-grid-frontend {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 20px;
    }

    .vlp-product-image-wrapper {
        height: 200px;
    }

    .vlp-cta-title {
        font-size: 28px;
    }

    .vlp-cta-text {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .vlp-hero-section {
        padding: 50px 0;
    }

    .vlp-hero-title {
        font-size: 28px;
    }

    .vlp-hero-subtitle {
        font-size: 16px;
    }

    .vlp-products-grid-frontend {
        grid-template-columns: 1fr;
    }

    .vlp-product-footer {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }

    .vlp-product-button {
        justify-content: center;
        width: 100%;
    }

    .vlp-cta-section {
        padding: 40px 0;
    }
}

/* Product Filters */
.vlp-filters-section {
    background: var(--vlp-light-bg);
    padding: 30px 0;
    margin-bottom: 40px;
    border-bottom: 2px solid rgba(0,0,0,0.06);
}

.vlp-filters-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
    justify-content: space-between;
}

.vlp-filter-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.vlp-filter-label {
    font-weight: 600;
    color: var(--vlp-text);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.vlp-filter-select {
    padding: 10px 16px;
    border: 2px solid rgba(0,0,0,0.1);
    border-radius: 8px;
    font-size: 14px;
    background: #fff;
    color: var(--vlp-text);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.vlp-filter-select:hover,
.vlp-filter-select:focus {
    border-color: var(--vlp-accent);
    outline: none;
}

.vlp-category-filters {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.vlp-category-btn {
    padding: 10px 20px;
    background: #fff;
    border: 2px solid rgba(0,0,0,0.1);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--vlp-text);
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.vlp-category-btn:hover {
    border-color: var(--vlp-accent);
    color: var(--vlp-accent);
}

.vlp-category-btn.active {
    background: var(--vlp-accent);
    border-color: var(--vlp-accent);
    color: #fff;
}

/* Product Comparison */
.vlp-comparison-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--vlp-primary);
    color: #fff;
    padding: 20px;
    box-shadow: 0 -4px 16px rgba(0,0,0,0.2);
    transform: translateY(100%);
    transition: transform 0.3s ease;
    z-index: 1000;
}

.vlp-comparison-bar.active {
    transform: translateY(0);
}

.vlp-comparison-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.vlp-comparison-items {
    display: flex;
    gap: 15px;
    flex: 1;
}

.vlp-comparison-item {
    background: rgba(255,255,255,0.1);
    padding: 10px 15px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.vlp-comparison-item-remove {
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    padding: 0;
    font-size: 18px;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.vlp-comparison-item-remove:hover {
    opacity: 1;
}

.vlp-compare-btn {
    padding: 12px 30px;
    background: var(--vlp-accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 0.05em;
}

.vlp-compare-btn:hover {
    background: var(--vlp-secondary);
    transform: translateY(-2px);
}

/* Certifications Badge */
.vlp-product-certifications {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.vlp-cert-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    background: var(--vlp-light-bg);
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    color: var(--vlp-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.vlp-cert-badge svg {
    width: 14px;
    height: 14px;
}

/* Featured Product Badge */
.vlp-product-item.featured::after {
    content: 'Featured';
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--vlp-accent);
    color: #fff;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    z-index: 10;
}

/* Technical Specs */
.vlp-tech-specs {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid rgba(0,0,0,0.06);
}

.vlp-tech-spec-item {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    font-size: 13px;
}

.vlp-tech-spec-label {
    color: #666;
    font-weight: 500;
}

.vlp-tech-spec-value {
    color: var(--vlp-text);
    font-weight: 600;
}

/* Language Toggle */
.vlp-language-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 100;
}

.vlp-lang-btn {
    padding: 8px 16px;
    background: rgba(255,255,255,0.2);
    border: 2px solid rgba(255,255,255,0.3);
    color: #fff;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 13px;
}

.vlp-lang-btn:hover {
    background: rgba(255,255,255,0.3);
    border-color: rgba(255,255,255,0.5);
}

/* Footer Section */
.vlp-footer {
    background: var(--vlp-footer-bg);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.vlp-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--vlp-primary), var(--vlp-secondary), var(--vlp-accent));
}

.vlp-footer-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px 40px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.vlp-footer-section h3 {
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.vlp-footer-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--vlp-accent);
    border-radius: 2px;
}

.vlp-footer-about p {
    color: rgba(255,255,255,0.8);
    line-height: 1.7;
    margin-bottom: 20px;
}

.vlp-footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
    color: rgba(255,255,255,0.8);
    line-height: 1.6;
}

.vlp-footer-contact-item svg {
    width: 20px;
    height: 20px;
    color: var(--vlp-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.vlp-footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.vlp-footer-links li {
    margin-bottom: 12px;
}

.vlp-footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.vlp-footer-links a::before {
    content: '';
    width: 4px;
    height: 4px;
    background: var(--vlp-accent);
    border-radius: 50%;
    transition: transform 0.3s ease;
}

.vlp-footer-links a:hover {
    color: #fff;
    padding-left: 8px;
}

.vlp-footer-links a:hover::before {
    transform: scale(1.5);
}

.vlp-footer-social {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.vlp-social-link {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
}

.vlp-social-link:hover {
    background: var(--vlp-accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0,168,150,0.3);
}

.vlp-social-link svg {
    width: 20px;
    height: 20px;
}

.vlp-footer-certifications {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 20px;
}

.vlp-footer-cert-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: rgba(255,255,255,0.1);
    border-radius: 6px;
    font-size: 13px;
    color: rgba(255,255,255,0.9);
}

.vlp-footer-cert-badge svg {
    width: 18px;
    height: 18px;
    color: var(--vlp-accent);
}

.vlp-footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 25px 20px;
    text-align: center;
}

.vlp-footer-bottom-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.vlp-footer-copyright {
    color: rgba(255,255,255,0.7);
    font-size: 14px;
}

.vlp-footer-bottom-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.vlp-footer-bottom-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.vlp-footer-bottom-links a:hover {
    color: var(--vlp-accent);
}

@media (max-width: 768px) {
    .vlp-footer-main {
        grid-template-columns: 1fr;
        gap: 35px;
        padding: 40px 20px 30px;
    }

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

    .vlp-footer-bottom-links {
        justify-content: center;
    }
}