:root {
    --bg-dark: #0a0e1a;
    --bg-card: #151b2e;
    --bg-card-hover: #1a2238;
    --text-primary: #ffffff;
    --text-secondary: #a8b2d1;
    --accent-blue: #64ffda;
    --accent-cyan: #00d4ff;
    --border-color: #1e293b;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo h2 {
    color: var(--accent-blue);
    font-size: 1.2rem;
    font-weight: 600;
}

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

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.95rem;
}

.nav-menu a:hover {
    color: var(--accent-blue);
}

/* Language Switcher */
.language-switcher {
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.85rem;
}

.lang-btn:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.lang-btn.active {
    background: var(--accent-blue);
    color: var(--bg-dark);
    border-color: var(--accent-blue);
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    text-align: center;
    margin-bottom: 4rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.highlight {
    color: var(--accent-blue);
    display: block;
    margin-top: 0.5rem;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 1.5rem;
}

.hero-description {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 1rem;
    line-height: 1.8;
}

/* Technology Grid */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.tech-item {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
    text-align: center;
}

.tech-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-blue);
    transform: translateY(-5px);
}

.tech-icon {
    color: var(--accent-blue);
    margin-bottom: 1rem;
}

.tech-item h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.hero-tagline {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 3rem;
}

/* Sections */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    color: var(--accent-blue);
}

/* Feature Cards */
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 3rem;
    margin-bottom: 2rem;
    position: relative;
}

.feature-number {
    position: absolute;
    top: -1rem;
    left: 2rem;
    background: var(--accent-blue);
    color: var(--bg-dark);
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.feature-content h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-subtitle {
    color: var(--accent-cyan);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.feature-content h4 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    color: var(--text-primary);
}

.feature-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

/* Processing List */
.processing-list {
    display: grid;
    gap: 1rem;
    margin-top: 2rem;
}

.processing-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-dark);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.check-icon {
    color: var(--accent-blue);
    font-size: 1.5rem;
    font-weight: 700;
}

.processing-item h4 {
    font-size: 1.1rem;
    margin: 0 0 0.3rem 0;
}

.processing-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

/* About Section */
.about-intro {
    max-width: 900px;
    margin: 0 auto 4rem;
    text-align: center;
}

.about-intro h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.about-intro p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.about-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s;
}

.about-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-blue);
    transform: translateY(-5px);
}

.about-icon {
    color: var(--accent-blue);
    margin-bottom: 1.5rem;
}

.about-card h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Experience Section */
.experience-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.experience-section h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    text-align: center;
}

.experience-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
    text-align: center;
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.exp-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    background: var(--bg-dark);
    padding: 1rem;
    border-radius: 8px;
}

/* Contact Section */
.contact {
    background: var(--bg-card);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-details {
    display: grid;
    gap: 2rem;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 1.5rem;
    background: var(--bg-dark);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.contact-item svg {
    color: var(--accent-blue);
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-item p {
    color: var(--text-secondary);
    margin: 0;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .language-switcher {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

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

    .feature-card {
        padding: 2rem 1.5rem;
    }

    .feature-content h3 {
        font-size: 1.5rem;
    }

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

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