:root {
    --primary: #3498db;
    --secondary: #2c3e50;
    --light: #ecf0f1;
    --dark: #2c3e50;
    --accent: #e74c3c;
    --text: #333;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    color: var(--text);
    background-color: #f9f9f9;
    line-height: 1.6;
}

header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 2rem 0;
    position: relative;
    overflow: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    position: relative;
    padding-bottom: 5px;
}

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

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

.hero {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    min-height: 70vh;
    padding: 2rem 0;
}

.hero-content {
    max-width: 600px;
    animation: fadeIn 1s ease;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    background-color: var(--accent);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid white;
}

.btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background-color: var(--primary);
    margin: 1rem auto;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.about-image {
    flex: 1;
    min-width: 300px;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.about-text {
    flex: 2;
    min-width: 300px;
}

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.skill-badge {
    background-color: var(--light);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Qualifications Section */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background-color: var(--primary);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 20px 40px;
    box-sizing: border-box;
    margin-bottom: 50px;
    animation: fadeIn 1s ease;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background-color: var(--primary);
    border: 4px solid white;
    top: 20px;
    border-radius: 50%;
    z-index: 1;
}

.timeline-item.left {
    left: 0;
    text-align: right;
}

.timeline-item.right {
    left: 50%;
}

.timeline-item.right::after {
    left: -10px;
}

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

.timeline-item h4 {
    margin-bottom: 0.5rem;
    font-weight: normal;
}

.timeline-item .date {
    color: #777;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.timeline-item .content {
    padding: 20px;
    background-color: white;
    border-radius: 6px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

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

.project-card {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.project-image {
    height: 200px;
    background-color: var(--secondary);
    background-size: cover;
    background-position: center;
}

.project-content {
    padding: 1.5rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.project-tag {
    background-color: var(--light);
    padding: 0.2rem 0.7rem;
    border-radius: 50px;
    font-size: 0.8rem;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background-color: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

.form-submit {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.form-submit:hover {
    background-color: #2980b9;
}

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

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.social-link {
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    transition: background-color 0.3s ease;
}

.social-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-image {
        order: -1;
    }
    
    .timeline::after {
        left: 31px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    
    .timeline-item.left {
        text-align: left;
    }
    
    .timeline-item.left::after,
    .timeline-item.right::after {
        left: 21px;
    }
    
    .timeline-item.right {
        left: 0;
    }
}

/* Dark mode toggle */
.dark-mode-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    z-index: 100;
    transition: background-color 0.3s ease;
}

.dark-mode-toggle:hover {
    background-color: #2980b9;
}