/* Reset and Base Styles */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a1a2e;
    --secondary-color: #16213e;
    --accent-color: #0f3460;
    --highlight-color: #e94560;
    --text-light: #ffffff;
    --text-dark: #333333;
    --text-gray: #666666;
    --bg-light: #f8f9fa;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --overlay-gradient: linear-gradient(45deg, rgba(240, 147, 251, 0.15), rgba(245, 87, 108, 0.15));
    --shadow-sm: 0 5px 15px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.2);
    --transition: 0.3s ease;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--highlight-color);
    color: var(--text-light);
    padding: 8px;
    text-decoration: none;
    z-index: 10000;
    border-radius: 0 0 4px 0;
}

.skip-link:focus {
    top: 0;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo h1 {
    color: var(--text-light);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 2px;
}

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

.nav-menu a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
}

.nav-menu a:hover,
.nav-menu a:focus {
    color: var(--highlight-color);
    outline: 2px solid var(--highlight-color);
    outline-offset: 4px;
    border-radius: 4px;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    background: transparent;
    border: none;
    padding: 5px;
}

.hamburger:focus {
    outline: 2px solid var(--highlight-color);
    outline-offset: 4px;
    border-radius: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-light);
    margin: 3px 0;
    transition: transform var(--transition), opacity var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-light);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-1);
    z-index: -1;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,154.7C960,171,1056,181,1152,165.3C1248,149,1344,107,1392,85.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
}

.hero-content {
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

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

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

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

.btn {
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition);
    display: inline-block;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--highlight-color);
    color: var(--text-light);
}

.btn-primary:hover,
.btn-primary:focus {
    background: #d63954;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(233, 69, 96, 0.4);
    outline: 2px solid var(--text-light);
    outline-offset: 2px;
}

.btn-secondary {
    background: transparent;
    color: var(--text-light);
    border: 2px solid var(--text-light);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background: var(--text-light);
    color: var(--primary-color);
    outline: 2px solid var(--text-light);
    outline-offset: 2px;
}

.contact-form input,
.contact-form textarea {
    padding: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    font-size: 1rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: 2px solid var(--highlight-color);
    outline-offset: 2px;
    border-color: var(--highlight-color);
    background: rgba(255, 255, 255, 0.15);
}

/* Section Styles */
section { padding: 80px 0; }

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-gray);
}

.services .section-header h2,
.services .section-subtitle,
.contact .section-header h2,
.contact .section-subtitle {
    color: var(--text-light);
}

/* About Section */
.about {
    background: var(--bg-light);
}

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

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

.about-text p {
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    line-height: 1.8;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition);
    will-change: transform;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-item h4 {
    font-size: 2.5rem;
    color: var(--highlight-color);
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: var(--text-gray);
    font-weight: 500;
}

/* Services Section */
.services {
    background: var(--primary-color);
    color: var(--text-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.service-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    transition: all var(--transition);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    will-change: transform;
}

.service-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-md);
}

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

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

.service-card p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
}

/* Portfolio Section */
.portfolio {
    background: var(--bg-light);
}

.portfolio-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    padding: 2rem 0;
    max-width: 1200px;
    margin: 0 auto;
}

.portfolio-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition);
    cursor: pointer;
    will-change: transform;
}

.portfolio-item:hover,
.portfolio-item:focus {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
    outline: 3px solid var(--highlight-color);
    outline-offset: 4px;
}

.portfolio-item:focus {
    outline: 3px solid var(--highlight-color);
    outline-offset: 4px;
}

/* BASE */
.portfolio-image {
    height: 250px;
    position: relative;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: #d4d4d4;
}

/* Portfolio Images */
.portfolio-tech { background-image: url('IMAGES/tech.jpg'); }
.portfolio-energy { background-image: url('IMAGES/energy.jpg'); }
.portfolio-health { background-image: url('IMAGES/health.jpg'); }
.portfolio-fintech { background-image: url('IMAGES/fintech.jpg'); }

/* OVERLAY GRADIENT */
.portfolio-image::after {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--overlay-gradient);
    z-index: 1;
    transition: opacity var(--transition);
}

.portfolio-item:hover .portfolio-image::after {
    opacity: 0;
}

.portfolio-info {
    padding: 1.5rem;
}

.portfolio-info h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.portfolio-info p {
    color: var(--text-gray);
}

/* Contact Section */
.contact {
    background: var(--secondary-color);
    color: var(--text-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--highlight-color);
}

.contact-item p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
}

.contact-item a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color var(--transition);
}

.contact-item a:hover,
.contact-item a:focus {
    color: var(--highlight-color);
    text-decoration: underline;
    outline: 2px solid var(--highlight-color);
    outline-offset: 2px;
    border-radius: 2px;
}

address {
    font-style: normal;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: var(--text-light);
    padding: 3rem 0 1rem;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--highlight-color);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition);
}

.footer-section a:hover {
    color: var(--highlight-color);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--primary-color);
        width: 100%;
        text-align: center;
        transition: left var(--transition);
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

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

    .hamburger {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .section-header h2 {
        font-size: 2rem;
    }
    
    .portfolio-item:focus {
        outline-offset: 2px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}