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

:root {
    --primary-color: #2c3e50;
    --accent-color: #3498db;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --gray: #7f8c8d;
    --border-color: #e1e8ed;
    --success-color: #27ae60;
}

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

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

/* Header & Navigation */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    padding: 1.5rem 0;
}

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

.nav-brand h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 700;
}

.nav-brand .accent {
    color: var(--accent-color);
}

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

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

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: var(--white);
    padding: 6rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: rgba(255,255,255,0.9);
}

.hero-description {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
    color: rgba(255,255,255,0.85);
}

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

.alt-bg {
    background-color: var(--light-bg);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    text-align: center;
    font-weight: 700;
}

.section-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
    color: var(--gray);
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.content-block h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.content-block p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.project-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.15);
}

.project-card h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.project-url {
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.project-card p {
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.tech-tag {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease;
    border: 2px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

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

.service-card h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.service-card p {
    line-height: 1.7;
    color: var(--gray);
}

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

.tech-category {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--accent-color);
}

.tech-category h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.tech-category p {
    color: var(--gray);
    line-height: 1.8;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.contact-info h3,
.contact-cta h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.contact-info p,
.contact-cta p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.contact-details {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--light-bg);
    border-radius: 8px;
}

.contact-details p {
    margin-bottom: 0.5rem;
}

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

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

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-brand .accent {
    color: var(--accent-color);
}

.footer-brand p {
    color: rgba(255,255,255,0.8);
}

.footer-links h4,
.footer-info h4 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

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

.footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s ease;
    display: block;
    margin-bottom: 0.5rem;
}

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

.footer-info p {
    color: rgba(255,255,255,0.8);
    margin-bottom: 0.5rem;
}

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

.footer-bottom p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 0.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
        font-size: 0.9rem;
    }

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

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

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

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

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection */
::selection {
    background-color: var(--accent-color);
    color: var(--white);
}