:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --dark-color: #0f172a;
    --light-color: #f8fafc;
    --accent-color: #3b82f6;
    --text-color: #334155;
    --white: #ffffff;
    --section-padding: 80px 0;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

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

.bg-light {
    background-color: var(--light-color);
}

.section-padding {
    padding: var(--section-padding);
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.underline {
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    margin: 0 auto;
    border-radius: 2px;
}

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

ul {
    list-style: none;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn.primary:hover {
    background-color: var(--accent-color);
    transform: translateY(-2px);
}

.btn.secondary {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    margin-left: 15px;
}

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

header {
    background-color: var(--white);
    height: 80px;
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-color);
}

.logo span {
    color: var(--primary-color);
}

.nav-links {
    display: flex;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    font-weight: 500;
    color: var(--secondary-color);
}

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

.menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    width: 100%;
}

.hero-text {
    flex: 1.2;
}

.hero-image {
    flex: 0.8;
    display: flex;
    justify-content: center;
    animation: float 6s ease-in-out infinite;
}

.avatar {
    width: 380px;
    height: 380px;
    border-radius: 50%;
    object-fit: cover;
    border: 8px solid var(--white);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

.hero-text h1 {
    font-size: 3.5rem;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.hero-text h1 span {
    color: var(--primary-color);
}

.hero-text h2 {
    font-size: 1.8rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.hero-text p {
    font-size: 1.2rem;
    max-width: 600px;
    margin-bottom: 30px;
}

/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

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

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: var(--primary-color);
    top: 0;
    bottom: 0;
    left: 20px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    margin-bottom: 30px;
}

.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    background-color: var(--primary-color);
    border-radius: 50%;
    left: 13px;
    top: 15px;
    z-index: 1;
}

.timeline-date {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.timeline-content {
    background-color: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.timeline-content h3 {
    margin-bottom: 5px;
    color: var(--dark-color);
}

.timeline-content h4 {
    color: var(--secondary-color);
    margin-bottom: 10px;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.skill-card {
    background-color: var(--white);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    transition: var(--transition);
}

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

.skill-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.skill-card h3 {
    margin-bottom: 15px;
    color: var(--dark-color);
}

/* Education Box */
.education-flex {
    display: flex;
    gap: 50px;
    flex-wrap: wrap;
}

.education-box {
    flex: 1;
    min-width: 300px;
}

.edu-item {
    margin-bottom: 25px;
}

.edu-item h3 {
    font-size: 1.2rem;
    color: var(--dark-color);
}

.cert-list li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.cert-list i {
    color: var(--primary-color);
}

/* Contact Section */
.contact-wrapper {
    display: flex;
    gap: 50px;
    flex-wrap: wrap;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 40px;
    height: 40px;
    background-color: var(--light-color);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.social-links {
    margin-top: 30px;
    display: flex;
    gap: 20px;
}

.social-links a {
    font-size: 1.5rem;
    color: var(--secondary-color);
}

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

.contact-form {
    flex: 1.5;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input, .contact-form textarea {
    padding: 15px;
    border: 1px solid #e2e8f0;
    border-radius: 5px;
    outline: none;
    font-family: inherit;
}

.contact-form input:focus, .contact-form textarea:focus {
    border-color: var(--primary-color);
}

/* Footer */
footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 40px 0;
    text-align: center;
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    .hero-text h1 {
        font-size: 3rem;
    }
    
    .hero-image .avatar {
        width: 320px;
        height: 320px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }

    .menu-btn {
        display: block;
        z-index: 1001;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: var(--white);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
        transition: var(--transition);
        z-index: 1000;
    }

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

    .nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: rgba(0,0,0,0.5);
        display: none;
        z-index: 999;
    }

    .nav-overlay.active {
        display: block;
    }

    .nav-links li {
        margin: 20px 0;
    }

    .nav-links a {
        font-size: 1.2rem;
    }

    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
        padding-top: 40px;
        gap: 30px;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .hero-text h2 {
        font-size: 1.5rem;
    }

    .hero-text p {
        margin: 0 auto 30px auto;
        font-size: 1.1rem;
    }

    .hero-btns {
        display: flex;
        flex-direction: column;
        gap: 15px;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

    .btn.secondary {
        margin-left: 0;
    }

    .avatar {
        width: 250px;
        height: 250px;
    }

    /* Timeline Adjustments */
    .timeline::after {
        left: 31px;
    }

    .timeline-item {
        padding-left: 60px;
        padding-right: 0;
    }

    .timeline-dot {
        left: 24px;
    }

    /* Education & Contact */
    .education-flex, .contact-wrapper {
        flex-direction: column;
        gap: 30px;
    }

    .education-box, .contact-info, .contact-form {
        min-width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 2rem;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .avatar {
        width: 200px;
        height: 200px;
    }

    .skill-card {
        padding: 30px 20px;
    }

    .timeline-content {
        padding: 15px;
    }
}