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

html {
    scroll-behavior: smooth;
}

:root {
    /* Logo Colors - Dark Grey & Blue */
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --accent-hover: #2980b9;
    --accent-light: #5dade2;
    --accent-dark: #1f618d;
    
    /* Dark Theme Colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2c2c2c;
    --bg-card: #2c3e50;
    --bg-card-hover: #34495e;
    --text-primary: #ecf0f1;
    --text-secondary: #bdc3c7;
    --text-light: #95a5a6;
    --white: #ffffff;
    --border-color: #34495e;
    --border-light: #4a5568;
    
    /* Shadows - Dark Theme */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
    
    /* Gradients - Dark Theme with Logo Colors */
    --gradient-primary: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    --gradient-accent: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    --gradient-hero: linear-gradient(135deg, #2c3e50 0%, #34495e 50%, #1a1a1a 100%);
    --gradient-card: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header and Navigation */
header {
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-color);
}

.navbar {
    padding: 1.25rem 0;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo {
    width: 64px;
    height: 64px;
    transition: transform 0.3s ease;
}

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

.gear-icon {
    width: 100%;
    height: 100%;
    animation: rotate 30s linear infinite;
    filter: drop-shadow(0 4px 6px rgba(59, 130, 246, 0.3));
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.logo-text h1 {
    font-size: 1.875rem;
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: 1px;
    margin: 0;
}

.logo-text .tagline {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.3;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    font-size: 0.9375rem;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-menu a:hover::before,
.nav-menu a.active::before {
    width: 80%;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: rgba(52, 152, 219, 0.15);
    color: var(--accent-light);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
    padding: 8px;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Hero Section */
.hero {
    background: var(--gradient-hero);
    background-size: 200% 200%;
    animation: gradientShift 15s ease infinite;
    padding: 120px 24px;
    text-align: center;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.hero::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(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content h2 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
    line-height: 1.2;
    text-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    letter-spacing: -0.5px;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
    font-weight: 400;
    line-height: 1.6;
}

.cta-button {
    display: inline-block;
    padding: 16px 48px;
    background: var(--gradient-accent);
    color: var(--white);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1.0625rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-light);
}

/* Page Header */
.page-header {
    background: var(--gradient-primary);
    padding: 80px 24px;
    text-align: center;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -1px;
    position: relative;
    z-index: 1;
}

/* Features Section */
.features {
    padding: 100px 24px;
    background: linear-gradient(to bottom, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-color);
    background: var(--bg-card-hover);
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-card h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* About Section */
.about-content {
    padding: 80px 24px;
    background: var(--bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: start;
}

.about-text h2,
.about-text h3 {
    color: var(--text-primary);
    margin-top: 2.5rem;
    margin-bottom: 1.25rem;
    font-weight: 700;
}

.about-text h2:first-child {
    margin-top: 0;
}

.about-text p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-text ul {
    margin-left: 2rem;
    margin-top: 1rem;
    list-style: none;
}

.about-text ul li {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.about-text ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.industrial-placeholder {
    background: var(--gradient-card);
    padding: 5rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.industrial-placeholder::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

.gear-animation {
    font-size: 5rem;
    animation: rotate 15s linear infinite;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.5));
}

.industrial-placeholder p {
    color: var(--text-primary);
    font-weight: 600;
    position: relative;
    z-index: 1;
}

/* Products Section */
.products-section {
    padding: 80px 24px;
    background: var(--bg-primary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.product-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.product-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(30%, -30%);
    transition: transform 0.4s ease;
}

.product-card:hover::after {
    transform: translate(30%, -30%) scale(2);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-color);
    background: var(--bg-card-hover);
}

.product-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    transition: transform 0.3s ease;
}

.product-card:hover .product-icon {
    transform: scale(1.15) rotate(-5deg);
}

.product-card h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.product-card ul {
    margin-left: 1.5rem;
    margin-top: 1rem;
    list-style: none;
}

.product-card li {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.product-card li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* Catalog Section */
.catalog-section {
    padding: 80px 24px;
    background: var(--bg-secondary);
}

.catalog-controls {
    margin-bottom: 2rem;
}

.search-box {
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.search-input {
    width: 100%;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
    font-family: inherit;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(52, 152, 219, 0.2);
    background: var(--bg-primary);
}

.search-input::placeholder {
    color: var(--text-light);
}

.catalog-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.catalog-stats {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.no-results {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.loading-indicator {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.filter-btn {
    padding: 12px 24px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    border-radius: 10px;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.filter-btn {
    position: relative;
    z-index: 0;
}

.filter-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--gradient-accent);
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
    z-index: -1;
}

.filter-btn:hover::before,
.filter-btn.active::before {
    width: 300px;
    height: 300px;
}

.filter-btn:hover,
.filter-btn.active {
    color: var(--white);
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.filter-btn.active {
    border-color: var(--accent-color);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
}

.catalog-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.catalog-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-color);
    background: var(--bg-card-hover);
}

.catalog-item-header {
    background: var(--gradient-primary);
    color: var(--text-primary);
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.catalog-item-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.15) 0%, transparent 70%);
    animation: pulse 6s ease-in-out infinite;
}

.catalog-item-header h3 {
    margin-bottom: 0.75rem;
    font-size: 1.375rem;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.category-badge {
    display: inline-block;
    background: rgba(52, 152, 219, 0.2);
    backdrop-filter: blur(10px);
    padding: 0.375rem 1rem;
    border-radius: 20px;
    font-size: 0.8125rem;
    margin-top: 0.5rem;
    font-weight: 500;
    position: relative;
    z-index: 1;
    border: 1px solid rgba(52, 152, 219, 0.4);
    color: var(--accent-light);
}

.catalog-item-body {
    padding: 2rem;
    flex-grow: 1;
}

.catalog-item-body p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

.product-details {
    color: var(--text-secondary);
}

.product-details p {
    margin-bottom: 0.5rem;
    font-size: 0.9375rem;
}

.product-details strong {
    color: var(--text-primary);
    font-weight: 600;
}

.product-prices {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.product-prices p {
    color: var(--accent-light);
    font-weight: 500;
}

.catalog-item-body ul {
    margin-left: 1.5rem;
    margin-top: 1rem;
    list-style: none;
}

.catalog-item-body li {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.catalog-item-body li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.catalog-item-footer {
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.catalog-btn {
    display: inline-block;
    width: 100%;
    padding: 14px;
    background: var(--gradient-accent);
    color: var(--white);
    text-decoration: none;
    text-align: center;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.catalog-btn {
    position: relative;
    z-index: 0;
}

.catalog-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
    z-index: -1;
}

.catalog-btn:hover::before {
    width: 300px;
    height: 300px;
}

.catalog-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Contact Section */
.contact-section {
    padding: 80px 24px;
    background: var(--bg-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
}

.contact-info h2 {
    color: var(--text-primary);
    margin-bottom: 2.5rem;
    font-size: 2rem;
    font-weight: 700;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    align-items: start;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.contact-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
    background: var(--bg-card-hover);
}

.contact-icon {
    font-size: 2.5rem;
    min-width: 60px;
    text-align: center;
}

.contact-item h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 1.125rem;
}

.contact-item p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.contact-form-container {
    background: var(--bg-card);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.contact-form-container h2 {
    color: var(--text-primary);
    margin-bottom: 2rem;
    font-size: 2rem;
    font-weight: 700;
}

.map-section {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.map-section h2 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.map-section p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.map-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.map-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.form-group label {
    margin-bottom: 0.625rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9375rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(52, 152, 219, 0.2);
    transform: translateY(-1px);
    background: var(--bg-primary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-light);
}

.submit-btn {
    padding: 16px 32px;
    background: var(--gradient-accent);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 1.0625rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.submit-btn {
    position: relative;
    z-index: 0;
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
    z-index: -1;
}

.submit-btn:hover::before {
    width: 300px;
    height: 300px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.form-message {
    margin-top: 1.5rem;
    padding: 1.25rem;
    border-radius: 10px;
    display: none;
    font-weight: 500;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-message.success {
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border: 2px solid #10b981;
    display: block;
}

.form-message.error {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border: 2px solid #ef4444;
    display: block;
}

/* Footer */
footer {
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 3rem 24px;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

footer p {
    opacity: 0.7;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: rgba(26, 26, 26, 0.98);
        backdrop-filter: blur(20px);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-xl);
        padding: 2rem 0;
        gap: 0;
        border-top: 1px solid var(--border-color);
    }

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

    .nav-menu a {
        width: 100%;
        padding: 1rem;
        border-radius: 0;
    }

    .logo-text h1 {
        font-size: 1.5rem;
    }

    .logo-text .tagline {
        font-size: 0.65rem;
    }

    .hero-content h2 {
        font-size: 2.25rem;
    }

    .hero-content p {
        font-size: 1.0625rem;
    }

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

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

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

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

    .contact-form-container {
        padding: 2rem;
    }
}

/* Hide catalog items by default when filtering */
.catalog-item.hidden {
    display: none;
}

/* Smooth animations for page load */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

body {
    animation: fadeIn 0.5s ease-in;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-accent);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-hover);
}