/* ===========================
   TEUTRON Fasteners Website
   German Flag Theme Colors:
   Black: #000000
   Red: #DD0000
   Gold: #FFCE00
   =========================== */

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

:root {
    --color-black: #000000;
    --color-red: #DD0000;
    --color-gold: #FFCE00;
    --color-white: #ffffff;
    --color-gray-light: #f5f5f5;
    --color-gray: #666666;
    --color-gray-dark: #333333;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--color-gray-dark);
    background-color: var(--color-white);
}

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

/* Navigation */
.navbar {
    background-color: var(--color-black);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

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

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

.nav-brand .brand-text {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: 2px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.nav-brand .brand-text:hover {
    color: var(--color-gold);
    transition: var(--transition);
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    color: var(--color-white);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-bottom: 3px solid transparent;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-gold);
    border-bottom-color: var(--color-gold);
}

.lang-switcher {
    list-style: none;
}

.lang-btn {
    background-color: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-gold);
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    border-radius: 4px;
}

.lang-btn:hover {
    background-color: var(--color-gold);
    color: var(--color-black);
}

.lang-option {
    opacity: 0.6;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-black) 0%, var(--color-gray-dark) 100%);
    color: var(--color-white);
    padding: 8rem 0 6rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        var(--color-black) 0px,
        var(--color-red) 100px,
        var(--color-gold) 200px,
        transparent 300px,
        transparent 100%
    );
    opacity: 0.05;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-gold);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    font-weight: 300;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: #b30000;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(221, 0, 0, 0.3);
}

.btn-secondary {
    background-color: var(--color-gold);
    color: var(--color-black);
    width: 100%;
    margin-top: 1rem;
}

.btn-secondary:hover {
    background-color: #e6b800;
}

/* Sections */
.section {
    padding: 4rem 0;
}

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

.section-title {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--color-black);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-red), var(--color-gold));
}

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature-card {
    background-color: var(--color-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--color-red);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-left-color: var(--color-gold);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: var(--color-black);
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--color-gray);
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.category-card {
    background-color: var(--color-white);
    padding: 3rem 2rem;
    text-align: center;
    border-radius: 8px;
    text-decoration: none;
    color: var(--color-black);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    border-top: 4px solid var(--color-gold);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
    border-top-color: var(--color-red);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.category-card h3 {
    font-size: 1.5rem;
    color: var(--color-black);
}

/* QR Code Section */
.qr-container {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    padding: 2rem;
    background-color: var(--color-white);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    max-width: 350px;
    margin-left: auto;
    margin-right: auto;
}

#qrcode {
    border: 8px solid var(--color-gold);
    border-radius: 8px;
}

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

/* Page Header */
.page-header {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('../images/background.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--color-white);
    padding: 6rem 0 5rem;
    text-align: center;
    position: relative;
}

.page-header h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: var(--color-gold);
    font-weight: 800;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8);
    letter-spacing: 1px;
}

.page-header p {
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--color-white);
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.8);
}

/* Products Layout */
.products-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3rem;
}

/* Filters Sidebar */
.filters-sidebar {
    background-color: var(--color-gray-light);
    padding: 2rem;
    border-radius: 8px;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.filters-sidebar h3 {
    color: var(--color-black);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-gold);
}

.filter-group {
    margin-bottom: 2rem;
}

.filter-group h4 {
    color: var(--color-gray-dark);
    margin-bottom: 1rem;
    font-size: 1rem;
}

.filter-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.8rem;
    cursor: pointer;
    font-size: 0.95rem;
}

.filter-option input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--color-red);
}

.filter-option.filter-disabled {
    opacity: 0.4;
    cursor: not-allowed;
    color: var(--color-gray);
}

.filter-option.filter-disabled input[type="checkbox"] {
    cursor: not-allowed;
}

/* Products Grid */
.products-grid {
    display: grid;
    gap: 2rem;
}

.product-card {
    background-color: var(--color-white);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    display: grid;
    grid-template-columns: 350px 1fr;
    transition: var(--transition);
    border: 1px solid #e0e0e0;
    min-height: 320px;
}

.product-card:hover {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
    border-color: var(--color-gold);
}

.product-image {
    width: 100%;
    height: 100%;
    min-height: 320px;
    background: linear-gradient(135deg, var(--color-gray-light), var(--color-white));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    border-right: 3px solid var(--color-gold);
    padding: 1.5rem;
    overflow: hidden;
}

.product-image img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    object-position: center;
}

.product-info {
    padding: 2rem;
}

.product-category {
    display: inline-block;
    background-color: var(--color-gold);
    color: var(--color-black);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.product-name {
    font-size: 1.8rem;
    color: var(--color-black);
    margin-bottom: 1rem;
}

.product-description {
    color: var(--color-gray);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.product-specs {
    background-color: var(--color-gray-light);
    padding: 1.5rem;
    border-radius: 4px;
    border-left: 4px solid var(--color-red);
}

.product-specs h4 {
    color: var(--color-black);
    margin-bottom: 1rem;
}

.spec-table {
    display: grid;
    gap: 0.5rem;
}

.spec-row {
    display: grid;
    grid-template-columns: 140px 1fr;
    padding: 0.5rem 0;
    border-bottom: 1px solid #ddd;
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-label {
    font-weight: 600;
    color: var(--color-gray-dark);
}

.spec-value {
    color: var(--color-gray);
}

/* About Page */
.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.content-block {
    margin-bottom: 3rem;
}

.content-block h2 {
    color: var(--color-black);
    font-size: 2rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--color-gold);
}

.content-block p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1rem;
    color: var(--color-gray-dark);
}

.quality-features {
    display: grid;
    gap: 2rem;
    margin-top: 2rem;
}

.quality-item {
    background-color: var(--color-gray-light);
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--color-red);
}

.quality-item h3 {
    color: var(--color-black);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.quality-item p {
    color: var(--color-gray);
    font-size: 1rem;
}

.contact-info {
    background-color: var(--color-gray-light);
    padding: 2rem;
    border-radius: 8px;
}

.contact-details {
    margin-top: 1rem;
}

.contact-details p {
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

/* Footer */
.footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: var(--color-gold);
    margin-bottom: 1rem;
}

.footer-section p {
    margin-bottom: 0.5rem;
    color: var(--color-gray-light);
}

.footer-links {
    list-style: none;
}

.footer-links a {
    color: var(--color-gray-light);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-gold);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--color-gray-dark);
    color: var(--color-gray);
}

/* Responsive Design */
@media (max-width: 968px) {
    .nav-menu {
        gap: 1rem;
        font-size: 0.9rem;
    }

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

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

    .filters-sidebar {
        position: static;
    }

    .product-card {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .product-image {
        height: 280px;
        min-height: 280px;
        border-right: none;
        border-bottom: 3px solid var(--color-gold);
        padding: 1.2rem;
    }

    .product-info {
        padding: 1.5rem;
    }

    .product-name {
        font-size: 1.5rem;
    }

    .spec-row {
        grid-template-columns: 1fr;
        gap: 0.3rem;
    }

    .spec-label {
        font-weight: 700;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .nav-menu {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .nav-brand .logo {
        height: 40px;
    }

    .nav-brand .brand-text {
        font-size: 1.4rem;
    }

    .page-header h1 {
        font-size: 2.5rem;
    }

    .page-header p {
        font-size: 1.1rem;
    }

    .page-header {
        padding: 4rem 0 3rem;
    }

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

    .product-image {
        height: 240px;
        min-height: 240px;
        padding: 1rem;
    }

    .product-info {
        padding: 1.2rem;
    }

    .product-name {
        font-size: 1.3rem;
    }

    .product-description {
        font-size: 0.95rem;
    }

    .product-specs {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .section {
        padding: 3rem 0;
    }

    .hero {
        padding: 5rem 0 4rem;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .nav-brand .brand-text {
        font-size: 1.2rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .page-header p {
        font-size: 1rem;
    }

    .page-header {
        padding: 3rem 0 2.5rem;
    }

    .product-image {
        height: 220px;
        min-height: 220px;
        padding: 0.8rem;
    }

    .product-info {
        padding: 1rem;
    }

    .product-name {
        font-size: 1.2rem;
    }

    .product-description {
        font-size: 0.9rem;
    }

    .product-specs {
        padding: 0.8rem;
    }

    .spec-row {
        padding: 0.4rem 0;
        font-size: 0.9rem;
    }

    .filters-sidebar {
        padding: 1.5rem;
    }
}