:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #ffffff;
    --text-color: #1f2937;
    --border-color: #e5e7eb;
    --card-bg: #f9fafb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

.dark-theme {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --bg-color: #111827;
    --text-color: #f9fafb;
    --border-color: #374151;
    --card-bg: #1f2937;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: var(--transition);
}

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

nav {
    background: var(--bg-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    font-weight: 700;
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: var(--transition);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.theme-switcher button {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
}

.theme-switcher button:hover {
    background-color: var(--border-color);
}

.phone {
    font-weight: 600;
    color: var(--primary-color);
}

.hero {
    background: linear-gradient(135deg, var(--primary-color), #1e40af);
    color: white;
    padding: 6rem 2rem;
    text-align: center;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
}

.cta-button {
    display: inline-block;
    background: white;
    color: var(--primary-color);
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    animation: fadeInUp 1s ease 0.4s both;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.features {
    padding: 5rem 2rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

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

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.feature-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.feature-link:hover {
    transform: translateX(5px);
}

.page-header {
    background: linear-gradient(135deg, var(--primary-color), #1e40af);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
}

.page-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.services, .software, .solutions, .files, .contacts {
    padding: 4rem 2rem;
}

.service-category {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.service-category h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.service-category ul {
    list-style: none;
    padding-left: 1rem;
}

.service-category li {
    padding: 0.3rem 0;
    position: relative;
}

.service-category li:before {
    content: "•";
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: -1rem;
}

.service-note {
    text-align: center;
    padding: 2rem;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.software-grid, .solutions-grid, .files-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.software-item, .solution-card, .file-item {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.software-item:hover, .solution-card:hover, .file-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.software-category {
    margin-bottom: 3rem;
}

.software-category h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.software-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

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

.download-btn {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    margin-top: 1rem;
}

.download-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

.contact-info {
    max-width: 500px;
    margin: 0 auto;
}

.contact-card {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
}

.contact-detail {
    margin: 1.5rem 0;
}

footer {
    background: var(--card-bg);
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

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

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .feature-grid,
    .software-grid,
    .solutions-grid,
    .files-grid {
        grid-template-columns: 1fr;
    }
}