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

:root {
    --bg-color: #0a192f;
    --text-primary: #ccd6f6;
    --text-secondary: #8892b0;
    --accent: #64ffda;
    --card-bg: #112240;
    --nav-height: 70px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    scroll-behavior: smooth;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    background-color: rgba(10, 25, 47, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    z-index: 1000;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

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

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    position: relative;
}

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

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

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

.hamburger {
    display: none;
    color: var(--accent);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-content {
    max-width: 700px;
}

.hero-greeting {
    color: var(--accent);
    font-size: 1rem;
    margin-bottom: 1rem;
    font-family: 'SF Mono', monospace;
}

.hero-name {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.1;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-btns {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg-color);
    border: 2px solid var(--accent);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(100, 255, 218, 0.2);
}

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

.btn-secondary:hover {
    background-color: rgba(100, 255, 218, 0.1);
    transform: translateY(-3px);
}

/* Sections */
.section {
    padding: 8rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    bottom: -10px;
    left: 0;
    background-color: var(--accent);
}

/* About Section */
.about-content {
    display: flex;
    gap: 3rem;
    align-items: center;
}

.about-text {
    flex: 1;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.about-img {
    flex: 0 0 300px;
}

.img-placeholder {
    width: 300px;
    height: 300px;
    border-radius: 10px;
    background-color: var(--card-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--accent);
    border: 2px solid var(--accent);
}

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

.experience-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    transition: transform 0.3s ease;
}

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

.exp-header {
    margin-bottom: 1.5rem;
}

.exp-header h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.exp-company {
    color: var(--accent);
    font-size: 1rem;
    display: block;
    margin-bottom: 0.3rem;
}

.exp-duration {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-family: 'SF Mono', monospace;
}

.exp-responsibilities {
    list-style: none;
    color: var(--text-secondary);
}

.exp-responsibilities li {
    margin-bottom: 0.8rem;
    position: relative;
    padding-left: 1.5rem;
}

.exp-responsibilities li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent);
}

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

.cert-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
}

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

.cert-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.cert-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.cert-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Skills Section */
.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.skill-tag {
    background-color: var(--card-bg);
    padding: 0.8rem 1.5rem;
    border-radius: 20px;
    color: var(--accent);
    font-size: 0.9rem;
    font-family: 'SF Mono', monospace;
    border: 1px solid rgba(100, 255, 218, 0.2);
    transition: transform 0.3s ease;
}

.skill-tag:hover {
    transform: translateY(-5px);
    background-color: rgba(100, 255, 218, 0.1);
}

/* Contact Section */
.contact-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-content p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.contact-link:hover {
    color: var(--accent);
}

.contact-link i {
    font-size: 1.2rem;
}

/* Footer */
.footer {
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    position: relative;
}

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--accent);
    color: var(--bg-color);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.back-to-top:hover {
    transform: translateY(-5px);
}

.back-to-top.visible {
    display: flex;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        right: -100%;
        flex-direction: column;
        background-color: var(--card-bg);
        width: 100%;
        height: calc(100vh - var(--nav-height));
        align-items: center;
        padding-top: 2rem;
        transition: right 0.3s ease;
    }

    .nav-links.active {
        right: 0;
    }

    .hamburger {
        display: block;
    }

    .hero-name {
        font-size: 2.5rem;
    }

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

    .about-content {
        flex-direction: column;
    }

    .about-img {
        flex: 0 0 auto;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

    .img-placeholder {
        width: 100%;
        height: 300px;
    }

    .section {
        padding: 6rem 1.5rem;
    }

    .hero-btns {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2rem;
    }

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

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