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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #ecf0f1;
    background: #2c3e50;
    overflow-x: hidden;
}

/* Header */
.header {
    background: #34495e;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
    backdrop-filter: blur(10px);
}

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

.logo {
    font-size: 2rem;
    font-weight: 700;
    color: #ecf0f1;
    text-decoration: none;
    letter-spacing: -1px;
    transition: transform 0.3s ease;
}

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

.logo .v-letter {
    color: #3498db;
    font-size: 2.1rem;
}

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

.nav-link {
    color: #ecf0f1;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #3498db;
    background: rgba(52, 152, 219, 0.1);
}

.language-selector {
    display: flex;
    gap: 0.5rem;
    margin-left: 1rem;
}

.lang-btn {
    padding: 0.4rem 0.8rem;
    background: transparent;
    border: 1px solid #3498db;
    color: #3498db;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.lang-btn.active,
.lang-btn:hover {
    background: #3498db;
    color: white;
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    background: none;
    border: none;
    color: #ecf0f1;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Main Content */
.main-content {
    margin-top: 80px;
}

.section {
    min-height: 100vh;
    padding: 4rem 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Home Section */
.home-section {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Video Background */
.video-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.background-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    opacity: 0.8;
    pointer-events: none;
}

.home-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(rgba(44, 62, 80, 0.4), rgba(52, 73, 94, 0.6));
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #ecf0f1;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    color: #bdc3c7;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: linear-gradient(45deg, #3498db, #2980b9);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.4);
}

/* About Section */
.about-section {
    background: #34495e;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: #3498db;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: #bdc3c7;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.feature-card {
    background: rgba(52, 152, 219, 0.1);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease;
    border: 1px solid rgba(52, 152, 219, 0.2);
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(52, 152, 219, 0.15);
}

.feature-icon {
    font-size: 2.5rem;
    color: #3498db;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #ecf0f1;
}

.feature-desc {
    color: #bdc3c7;
    font-size: 0.9rem;
}

/* Technologies Section */
.technologies-section {
    background: #2c3e50;
    padding: 4rem 2rem;
}

.technologies-content h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #3498db;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    max-width: 1200px;
}

.tech-item {
    background: rgba(52, 152, 219, 0.1);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(52, 152, 219, 0.2);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.tech-item:hover {
    transform: translateY(-10px);
    background: rgba(52, 152, 219, 0.15);
    border-color: #3498db;
    box-shadow: 0 10px 30px rgba(52, 152, 219, 0.2);
}

.tech-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(52, 152, 219, 0.1), transparent);
    transform: rotate(45deg);
    transition: all 0.6s ease;
    opacity: 0;
}

.tech-item:hover::before {
    animation: shimmer 1.5s ease-in-out;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
        opacity: 0;
    }
}

.tech-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
}

.tech-logo svg {
    width: 100%;
    height: 100%;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 0 10px rgba(52, 152, 219, 0.3));
}

.tech-item:hover .tech-logo svg {
    transform: scale(1.1);
    filter: drop-shadow(0 0 20px rgba(52, 152, 219, 0.5));
}

.tech-name {
    color: #ecf0f1;
    font-weight: 600;
    font-size: 0.9rem;
    margin-top: 0.5rem;
    position: relative;
    z-index: 2;
}

/* Services Section */
.services-section {
    background: #34495e;
}

.services-content h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #3498db;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
}

.service-card {
    background: linear-gradient(135deg, #34495e 0%, #2c3e50 100%);
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    border: 1px solid rgba(52, 152, 219, 0.1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    border-color: #3498db;
}

.service-icon {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 1.5rem;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #ecf0f1;
}

.service-desc {
    color: #bdc3c7;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.service-features {
    list-style: none;
    text-align: left;
}

.service-features li {
    padding: 0.5rem 0;
    color: #bdc3c7;
    position: relative;
    padding-left: 2rem;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #3498db;
    font-weight: bold;
}

/* Contact Section */
.contact-section {
    background: #34495e;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #3498db;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 12px;
    transition: background 0.3s ease;
}

.contact-item:hover {
    background: rgba(52, 152, 219, 0.15);
}

.contact-icon {
    font-size: 1.5rem;
    color: #3498db;
    margin-right: 1rem;
    width: 40px;
}

.contact-details h3 {
    color: #ecf0f1;
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: #bdc3c7;
}

.contact-form {
    background: rgba(52, 152, 219, 0.1);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid rgba(52, 152, 219, 0.2);
}

.contact-form h3 {
    color: #3498db;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #ecf0f1;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid rgba(52, 152, 219, 0.3);
    border-radius: 8px;
    background: rgba(0,0,0,0.2);
    color: #ecf0f1;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

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

.submit-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(45deg, #3498db, #2980b9);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.4);
}

/* Footer */
.footer {
    background: #1a252f;
    padding: 2rem;
    text-align: center;
    border-top: 1px solid rgba(52, 152, 219, 0.2);
}

.footer p {
    color: #7f8c8d;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: #34495e;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 2rem;
        transition: left 0.3s ease;
    }

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

    .mobile-menu {
        display: block;
    }

    .hero-title {
        font-size: 2.5rem;
    }
    
    /* Mobile video background adjustments */
    .background-video {
        opacity: 0.5;
        min-width: 120%;
        min-height: 120%;
    }
    
    .home-section::before {
        background: linear-gradient(rgba(44, 62, 80, 0.6), rgba(52, 73, 94, 0.8));
    }

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

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

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

    .language-selector {
        margin-left: 0;
        margin-top: 1rem;
    }
}

/* Hidden class for language switching */
.hidden {
    display: none !important;
}

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}