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

:root {
    --black: #000000;
    --white: #ffffff;
    --gray-dark: #1a1a1a;
    --gray-medium: #333333;
    --gray-light: #f5f5f5;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

.navbar {
    background-color: var(--black);
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-link {
    color: var(--white) !important;
    font-weight: 500;
    margin-left: 2rem;
    position: relative;
    transition: var(--transition);
}

.nav-link:hover {
    opacity: 0.7;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--white);
    transition: width 0.3s ease;
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--black);
    color: var(--white);
    padding: 100px 0;
}

.hero-content {
    text-align: center;
    animation: fadeInUp 1s ease;
}

.hero h1 {
    font-size: 5rem;
    font-weight: 900;
    letter-spacing: -3px;
    margin-bottom: 1rem;
}

.hero .lead {
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.5px;
    opacity: 0.9;
}

.profile-picture {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 2rem;
    border: 4px solid var(--white);
    box-shadow: 0 10px 40px rgba(255, 255, 255, 0.2);
}

.hero-buttons {
    margin-top: 3rem;
}

.btn-primary {
    background-color: var(--white);
    color: var(--black);
    border: 2px solid var(--white);
    padding: 0.875rem 2.5rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.875rem;
    transition: var(--transition);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--white);
}

.btn-outline-light {
    border: 2px solid var(--white);
    color: var(--white);
    padding: 0.875rem 2.5rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.875rem;
    transition: var(--transition);
}

.btn-outline-light:hover {
    background-color: var(--white);
    color: var(--black);
}

.section {
    padding: 100px 0;
}

.section-title {
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: -2px;
    margin-bottom: 4rem;
    text-align: center;
}

.projects-soon {
    text-align: center;
}
.bg-white {
    background-color: var(--white);
}

.about-text {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--gray-medium);
    text-align: center;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.skill-item {
    padding: 1.5rem;
    background-color: var(--black);
    color: var(--white);
    text-align: center;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.5px;
    transition: var(--transition);
}

.skill-item:hover {
    background-color: var(--gray-dark);
    transform: translateY(-5px);
}

/* Certifications Section Styles */
.certification-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: var(--transition);
    height: 100%;
}

.certification-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.cert-logo {
    width: 120px;
    height: 120px;
    object-fit: contain;
    margin-bottom: 1.5rem;
}

.cert-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--black);
}

.cert-issuer {
    color: var(--gray-medium);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.cert-date {
    color: var(--gray-medium);
    font-size: 0.875rem;
    font-style: italic;
}

.project-card {
    padding: 2.5rem;
    background-color: var(--gray-light);
    height: 100%;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--black);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card:hover {
    transform: translateY(-10px);
}

.project-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--black);
    opacity: 0.1;
    line-height: 1;
    margin-bottom: 1rem;
}

.project-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
}

.project-description {
    color: var(--gray-medium);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag {
    padding: 0.5rem 1rem;
    background-color: var(--white);
    border: 1px solid var(--black);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-link {
    color: var(--black);
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
}

.project-link:hover {
    transform: translateX(10px);
}

.article-card {
    padding: 2rem;
    border: 1px solid var(--black);
    height: 100%;
    transition: var(--transition);
    background-color: var(--white);
}

.article-card:hover {
    background-color: var(--black);
    color: var(--white);
}

.article-card:hover .article-meta,
.article-card:hover .article-excerpt,
.article-card:hover .article-link {
    color: var(--white);
}

.article-meta {
    font-size: 0.875rem;
    color: var(--gray-medium);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    font-weight: 600;
    transition: var(--transition);
}

.article-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
}

.article-excerpt {
    color: var(--gray-medium);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    transition: var(--transition);
}

.article-link {
    color: var(--black);
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
}

.article-link:hover {
    transform: translateX(10px);
}

.contact-text {
    font-size: 1.25rem;
    color: var(--gray-medium);
    line-height: 1.8;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.contact-icon-item {
    width: 60px;
    height: 60px;
    border: 2px solid var(--black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--black);
    text-decoration: none;
    transition: var(--transition);
    font-size: 1.5rem;
}

.contact-icon-item:hover {
    background-color: var(--black);
    color: var(--white);
    transform: translateY(-8px);
}

.footer {
    background-color: var(--black);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    margin: 0;
    font-size: 0.875rem;
    opacity: 0.7;
}

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

@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }

    .hero .lead {
        font-size: 1.25rem;
    }

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

    .nav-link {
        margin-left: 0;
        margin-top: 1rem;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }

    .hero-buttons {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .hero-buttons .btn {
        margin: 0 !important;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .project-number {
        font-size: 2rem;
    }

    .project-title {
        font-size: 1.5rem;
    }
}