:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-bg: #ecf0f1;
    --dark-text: #2c3e50;
    --light-text: #7f8c8d;
    --white: #ffffff;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

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

/* Header & Navigation */
header {
    background: var(--white);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--secondary-color);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-bg);
    border-radius: 50%;
}

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

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

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: var(--white);
    padding: 6rem 0;
    text-align: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.profile-pic {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    border: 4px solid var(--secondary-color);
    object-fit: cover;
}

.hero h1 {
    font-size: 3rem;
    font-weight: bold;
}

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

.hero .subtitle {
    font-size: 1.1rem;
    color: #bdc3c7;
}

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

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

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

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

/* About Section */
.about {
    padding: 4rem 0;
    background: var(--light-bg);
}

.about h2,
.skills h2,
.experience h2,
.education h2,
.languages h2,
.contact h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--dark-text);
}

.about-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--light-text);
    line-height: 1.8;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.info-item {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.info-item strong {
    color: var(--secondary-color);
    display: block;
    margin-bottom: 0.5rem;
}

.info-item a {
    color: var(--secondary-color);
    text-decoration: none;
}

.info-item a:hover {
    text-decoration: underline;
}

/* Skills Section */
.skills {
    padding: 4rem 0;
}

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

.skill-category {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--secondary-color);
}

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

.skill-category ul {
    list-style: none;
}

.skill-category li {
    padding: 0.5rem 0;
    color: var(--light-text);
    position: relative;
    padding-left: 1.5rem;
}

.skill-category li:before {
    content: "▸";
    color: var(--secondary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* Experience Section */
.experience {
    padding: 4rem 0;
    background: var(--light-bg);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--secondary-color);
}

.timeline-item {
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: 0;
    margin-right: auto;
    width: 45%;
    text-align: right;
    padding-right: 3rem;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: auto;
    margin-right: 0;
    width: 45%;
    text-align: left;
    padding-left: 3rem;
}

.timeline-date {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    background: var(--secondary-color);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    top: 0;
}

.timeline-content {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.timeline-content h3 {
    color: var(--secondary-color);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.timeline-content .company {
    color: var(--light-text);
    font-style: italic;
    margin-bottom: 1rem;
}

.timeline-content ul {
    list-style: none;
    text-align: justify;
}

.timeline-content li {
    margin-bottom: 0.8rem;
    color: var(--light-text);
    line-height: 1.6;
}

.timeline-content strong {
    color: var(--dark-text);
}

/* Education Section */
.education {
    padding: 4rem 0;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.education-item {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    border-top: 3px solid var(--secondary-color);
}

.edu-date {
    color: var(--secondary-color);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.education-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--dark-text);
}

.edu-school {
    color: var(--light-text);
    margin-bottom: 0.5rem;
}

.edu-grade {
    color: var(--secondary-color);
    font-weight: 600;
}

.certifications {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--accent-color);
}

.certifications h3 {
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.certifications ul {
    list-style: none;
}

.certifications li {
    padding: 0.5rem 0;
    color: var(--light-text);
    position: relative;
    padding-left: 1.5rem;
}

.certifications li:before {
    content: "★";
    color: var(--accent-color);
    position: absolute;
    left: 0;
}

/* Languages Section */
.languages {
    padding: 4rem 0;
    background: var(--light-bg);
}

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

.language-item {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.language-item h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.language-item ul {
    list-style: none;
}

.language-item li {
    padding: 0.5rem 0;
    color: var(--light-text);
    position: relative;
    padding-left: 1.5rem;
}

.language-item li:before {
    content: "◆";
    color: var(--secondary-color);
    position: absolute;
    left: 0;
}

/* Contact Section */
.contact {
    padding: 4rem 0;
    text-align: center;
}

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

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

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 1.5rem;
    background: var(--light-bg);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--dark-text);
    transition: var(--transition);
    font-weight: 600;
}

.contact-link:hover {
    background: var(--secondary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.contact-link .icon {
    font-size: 1.5rem;
}

/* Footer */
footer {
    background: var(--dark-text);
    color: var(--white);
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
}

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

    .hero h1 {
        font-size: 2rem;
    }

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

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 200px;
    }

    .about h2,
    .skills h2,
    .experience h2,
    .education h2,
    .languages h2,
    .contact h2 {
        font-size: 1.8rem;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        width: 100%;
        text-align: left;
        margin-left: 0;
        margin-right: 0;
        padding-left: 60px;
        padding-right: 1.5rem;
    }

    .timeline-date {
        left: 20px;
        transform: translateX(-50%);
        font-size: 0.8rem;
    }

    .contact-links {
        flex-direction: column;
    }

    .contact-link {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero {
        padding: 3rem 0;
    }

    .profile-pic {
        width: 120px;
        height: 120px;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero .title {
        font-size: 1rem;
    }
}