/* Reset and base styles */
:root {
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --accent-color: #06b6d4;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-hero: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 8px;
    --radius-lg: 12px;
}

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

body {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    font-weight: 400;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Header */
header {
    background: var(--bg-primary);
    border-bottom: 1px solid #e5e7eb;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

.nav-brand h1 {
    color: var(--primary-color);
    font-size: 1.875rem;
    margin-bottom: 0.25rem;
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* Hero section */
.hero {
    background: var(--gradient-hero);
    color: white;
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="white" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero h2 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
    background: linear-gradient(45deg, #ffffff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    opacity: 1 !important;
    line-height: 1.7;
    color: #ffffff !important;
    font-weight: 500;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    padding: 0.875rem 2rem;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: 600;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.cta-button:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.cta-button.secondary {
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-color);
}

.cta-button.secondary:hover {
    background: white;
}

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

section:nth-child(even) {
    background: var(--bg-primary);
}

/* About section */
.about h3 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-text strong {
    color: var(--primary-color);
}

.expertise-areas {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid #e5e7eb;
}

.expertise-areas h4 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.expertise-areas ul {
    list-style: none;
}

.expertise-areas li {
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.expertise-areas li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-size: 0.75rem;
    top: 0.75rem;
}

/* Work section */
.work {
    background: var(--bg-secondary);
}

.work h3 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

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

.blog-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    border: 1px solid #e5e7eb;
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.blog-card h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.blog-meta {
    font-size: 0.875rem;
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 1rem;
}

/* Innovation Algebra section */
.innovation-algebra {
    background: var(--bg-primary);
}

.innovation-algebra h3 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

.company-description {
    font-size: 1.125rem;
    text-align: center;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.company-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature {
    text-align: center;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid #e5e7eb;
}

.feature h4 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

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

.cta-note {
    display: block;
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Contact section */
.contact {
    background: var(--bg-secondary);
}

.contact h3 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

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

.contact-content > p {
    font-size: 1.125rem;
    margin-bottom: 3rem;
}

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

.contact-item {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    border: 1px solid #e5e7eb;
}

.contact-item h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.contact-item a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background: var(--text-primary);
    color: white;
    padding: 3rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-info p {
    color: #d1d5db;
    margin-bottom: 0.5rem;
}

.footer-info a {
    color: var(--accent-color);
    text-decoration: none;
}

.footer-info a:hover {
    text-decoration: underline;
}

.footer-tagline {
    font-style: italic;
    color: var(--accent-color);
}

/* Responsive design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .hero h2 {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .company-features {
        grid-template-columns: 1fr;
    }
    
    .contact-methods {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .container {
        padding: 0 16px;
    }
    
    section {
        padding: 3rem 0;
    }
}

@media (max-width: 480px) {
    .hero h2 {
        font-size: 2rem;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}