/* Base Styles and CSS Reset */
:root {
    /* Light theme */
    --primary-color: #4e54c8;
    --secondary-color: #8f94fb;
    --text-color: #333;
    --bg-color: #f9f9f9;
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --heading-color: #222;
    
    /* Font variables */
    --font-main: 'Poppins', sans-serif;
    --transition: all 0.3s ease;
}

.dark-theme {
    --primary-color: #8f94fb;
    --secondary-color: #4e54c8;
    --text-color: #e0e0e0;
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --border-color: #333;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --heading-color: #ffffff;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    transition: var(--transition);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

.section-title {
    font-size: 2rem;
    color: var(--heading-color);
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 30px;
    font-weight: 500;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px var(--shadow-color);
    color: white;
}

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

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

.btn.small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--bg-color);
    box-shadow: 0 2px 10px var(--shadow-color);
    transition: var(--transition);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo a {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 1px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

nav {
    display: flex;
    align-items: center;
}

nav ul {
    display: flex;
}

nav ul li {
    margin-right: 30px;
}

nav ul li a {
    color: var(--text-color);
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

nav ul li a:hover::after, nav ul li a.active::after {
    width: 100%;
}

.theme-toggle, .mobile-menu {
    font-size: 1.2rem;
    cursor: pointer;
    margin-left: 20px;
    color: var(--text-color);
}

.mobile-menu {
    display: none;
}

/* Hero Section */
.hero {
    padding-top: 150px;
    padding-bottom: 100px;
}

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

.hero-text {
    flex: 1;
    padding-right: 60px;
}

.hero-text h1 {
    font-size: 3rem;
    margin-bottom: 15px;
    color: var(--heading-color);
}

.hero-text h1 span {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text h2 {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 20px;
    color: var(--heading-color);
    opacity: 0.9;
}

.hero-text p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    line-height: 1.7;
    max-width: 600px;
}

.hero-btns {
    margin-bottom: 30px;
}

.hero-btns .btn {
    margin-right: 15px;
    margin-bottom: 10px;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--card-bg);
    color: var(--primary-color);
    font-size: 1.2rem;
    transition: var(--transition);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.social-links a:hover {
    transform: translateY(-3px);
    color: var(--secondary-color);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.image-container {
    max-width: 400px;
    border-radius: 50%;
    overflow: hidden;
    position: relative;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    padding: 6px;
    box-shadow: 0 10px 30px var(--shadow-color);
}

.image-container img {
    width: 100%;
    border-radius: 50%;
    display: block;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.about-text {
    font-size: 1.05rem;
    line-height: 1.7;
}

.about-text p {
    margin-bottom: 20px;
}

.education {
    margin-top: 30px;
}

.education h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--heading-color);
}

.education-item {
    margin-bottom: 20px;
    padding: 20px;
    border-radius: 10px;
    background-color: var(--card-bg);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.education-item h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--heading-color);
}

.education-item p {
    margin-bottom: 5px;
}

/* Skills Section */
.skills-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.skill-category {
    margin-bottom: 30px;
}

.skill-category h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--heading-color);
}

.skill-item {
    margin-bottom: 15px;
}

.skill-item span {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.skill-progress {
    width: 100%;
    height: 10px;
    background-color: var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}

.skill-progress .progress {
    height: 100%;
    border-radius: 10px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.soft-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.soft-skills span {
    padding: 8px 15px;
    background-color: var(--card-bg);
    border-radius: 20px;
    font-size: 0.9rem;
    box-shadow: 0 3px 8px var(--shadow-color);
}

.languages {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.language {
    flex: 1;
    min-width: 120px;
    padding: 15px;
    background-color: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 3px 10px var(--shadow-color);
    text-align: center;
}

.language span {
    display: block;
    font-weight: 600;
    margin-bottom: 5px;
}

/* Experience Section */
.experience-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.work-experience h3, .certifications h3, .achievements h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--heading-color);
}

.timeline {
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 13px;
    height: 100%;
    width: 2px;
    background-color: var(--primary-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 30px;
    padding-left: 40px;
}

.timeline-dot {
    position: absolute;
    top: 5px;
    left: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background-color: var(--card-bg);
    border: 4px solid var(--primary-color);
    z-index: 1;
}

.timeline-content {
    padding: 20px;
    border-radius: 10px;
    background-color: var(--card-bg);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.timeline-content h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--heading-color);
}

.timeline-content p {
    margin-bottom: 5px;
}

.cert-list li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
    padding: 15px;
    border-radius: 10px;
    background-color: var(--card-bg);
    box-shadow: 0 3px 10px var(--shadow-color);
}

.cert-list li i {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-right: 15px;
    margin-top: 3px;
}

.cert-list li span {
    display: block;
    font-weight: 600;
    margin-bottom: 5px;
}

.achievement-list {
    padding: 20px;
    border-radius: 10px;
    background-color: var(--card-bg);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.achievement-list li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 10px;
}

.achievement-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.project-card {
    border-radius: 10px;
    overflow: hidden;
    background-color: var(--card-bg);
    box-shadow: 0 5px 15px var(--shadow-color);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-5px);
}

.project-img {
    height: 200px;
    overflow: hidden;
}

.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-img img {
    transform: scale(1.05);
}

.project-info {
    padding: 20px;
}

.project-info h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--heading-color);
}

.project-info p {
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.project-tags span {
    font-size: 0.8rem;
    padding: 4px 10px;
    border-radius: 20px;
    background-color: rgba(78, 84, 200, 0.1);
    color: var(--primary-color);
}

.project-links {
    display: flex;
    gap: 10px;
}

.project-links .btn {
    flex: 1;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 20px;
    margin-top: 5px;
}

.contact-item h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: var(--heading-color);
}

.social-links-large {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.social-links-large a {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    background-color: var(--card-bg);
    border-radius: 10px;
    color: var(--text-color);
    transition: var(--transition);
    box-shadow: 0 3px 10px var(--shadow-color);
}

.social-links-large a i {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-right: 15px;
}

.social-links-large a:hover {
    transform: translateX(5px);
    background-color: var(--primary-color);
}

.social-links-large a:hover i, 
.social-links-large a:hover span {
    color: white;
}

.contact-form {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px var(--shadow-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(78, 84, 200, 0.1);
}

/* Footer */
footer {
    background-color: var(--card-bg);
    padding: 30px 0;
    box-shadow: 0 -5px 15px var(--shadow-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-content p {
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--text-color);
}

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

/* Media Queries for Responsiveness */
@media screen and (max-width: 992px) {
    html {
        font-size: 15px;
    }
    
    .hero-content {
        flex-direction: column-reverse;
    }
    
    .hero-text {
        padding-right: 0;
        text-align: center;
        margin-top: 40px;
    }
    
    .hero-btns, .social-links {
        justify-content: center;
    }
    
    .image-container {
        max-width: 300px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    nav ul {
        display: none;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .experience-content {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 576px) {
    .section-title {
        font-size: 1.8rem;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .image-container {
        max-width: 220px;
    }
    
    .project-links {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}