/* Import Inter Font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

:root {
    /* Dark Mode Color Palette */
    --bg-primary: #0a0a0a;
    --bg-surface: #141414;
    --bg-card: #1a1a1a;
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    
    /* Accent Colors */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-hover: #4f46e5;
    
    /* Glassmorphism */
    --glass-bg: rgba(26, 26, 26, 0.7);
    --glass-border: rgba(255, 255, 255, 0.05);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.15);
    --shadow-layered: 0 1px 2px rgba(0, 0, 0, 0.3), 
                      0 8px 16px rgba(0, 0, 0, 0.2), 
                      0 16px 32px rgba(0, 0, 0, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation Bar */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

nav.scrolled {
    background: var(--glass-bg);
    box-shadow: var(--shadow-sm);
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transition: width 0.3s ease;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-surface) 100%);
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 900px;
    animation: fadeInUp 1s ease-out;
}

.hero h1 {
    font-size: 4.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
    line-height: 1.1;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-weight: 400;
}

/* Hero Description */
.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 700px;
    margin: 1.5rem auto 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

/* About Section */
.about-section {
    padding: 100px 0;
    background: var(--bg-surface);
}

.about-section h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-content .intro {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.about-content .expertise-summary {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.about-text {
    max-width: 900px;
    margin: 0 auto;
}

.about-text > p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
}

/* Invisible container for company experiences */
.experience-container {
    /* NO background, NO border - completely invisible */
    background: transparent;
    border: none;
    
    /* Only padding for spacing */
    padding: 1.5rem 0;
    margin: 1rem 0 2rem;
}

.experience-container p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.experience-container p:last-child {
    margin-bottom: 0;
}

/* Company name highlighting */
.company-highlight {
    color: var(--text-primary);
    font-weight: 600;
}

.methodology {
    background: var(--glass-bg);
    border-left: 3px solid var(--accent-primary);
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 8px;
}

.methodology strong {
    color: var(--accent-primary);
}

.expertise-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 2rem;
}

.expertise-tags .tag {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.625rem 1.25rem;
    border-radius: 24px;
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 500;
    transition: all 0.3s ease;
}

.expertise-tags .tag:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

/* Section Styles */
section {
    padding: 100px 0;
    position: relative;
}

section h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
    letter-spacing: -0.02em;
}

section h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    margin: 1.5rem auto 0;
    border-radius: 2px;
}

/* Services/Cards Grid */
.services-grid,
.skills-grid,
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2.5rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-layered);
}

.card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 1px var(--accent-primary), 
                0 20px 40px rgba(0, 0, 0, 0.3);
}

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

.card p,
.card ul {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

.card ul {
    list-style: none;
    padding-left: 0;
}

.card ul li {
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.card ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

/* Tools Section */
.tools-section {
    background: var(--bg-surface);
}

.tool-category {
    margin-bottom: 2.5rem;
}

.tool-category h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.tool-category p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

/* Contact Section */
.contact-section {
    text-align: center;
    background: var(--bg-surface);
}

.contact-grid {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-top: 3rem;
}

.contact-link {
    padding: 1rem 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-link:hover {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

/* Footer */
footer {
    background: var(--bg-primary);
    padding: 3rem 0;
    text-align: center;
    border-top: 1px solid var(--glass-border);
}

footer p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

.fade-in {
    animation: fadeInUp 0.8s ease-out;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 3.5rem;
    }
    
    section h2 {
        font-size: 2.5rem;
    }
    
    section {
        padding: 80px 0;
    }
}

@media (max-width: 768px) {
    .nav-links {
        gap: 1.5rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero .subtitle {
        font-size: 1.25rem;
    }
    
    .about-section {
        padding: 60px 0;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .highlight-item {
        padding: 1.5rem;
    }
    
    .expertise-tags {
        justify-content: center;
    }
    
    section h2 {
        font-size: 2rem;
    }
    
    section {
        padding: 60px 0;
    }
    
    .services-grid,
    .skills-grid,
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero .subtitle {
        font-size: 1.1rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    nav .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }
}

/* Mobile Menu Toggle (for future implementation) */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-links.active {
        display: flex;
    }
}