/* Base Styles */
:root {
    --primary-color: #0071e3;
    --primary-hover: #0077ed;
    --text-color: #1d1d1f;
    --text-secondary: #86868b;
    --bg-color: #ffffff;
    --bg-light: #f5f5f7;
    --border-color: #d2d2d7;
    --transition: all 0.3s ease;
    --border-radius: 12px;
    --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 6rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
    color: var(--text-color);
}

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

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 30px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    text-align: center;
    font-size: 1rem;
    border: none;
    outline: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 113, 227, 0.3);
}

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

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 113, 227, 0.3);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    align-items: center;
}

.nav-links li {
    margin-left: 2.5rem;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition);
    position: relative;
}

.nav-links a:not(.btn-outline):hover {
    color: var(--primary-color);
}

.nav-links a:not(.btn-outline)::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav-links a:not(.btn-outline):hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    cursor: pointer;
    z-index: 1001;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: all 0.3s ease-in-out;
    background-color: var(--text-color);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f0fe 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: linear-gradient(45deg, rgba(0, 113, 227, 0.1) 0%, rgba(0, 113, 227, 0.05) 100%);
    top: -200px;
    right: -200px;
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: linear-gradient(45deg, rgba(0, 113, 227, 0.1) 0%, rgba(0, 113, 227, 0.05) 100%);
    bottom: -150px;
    left: -100px;
    z-index: 0;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 4.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.1;
    background: linear-gradient(90deg, #1a1a1a 0%, #4a4a4a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards;
}

.hero .subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards 0.2s;
}

.hero-text {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards 0.4s;
}

.hero .btn {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards 0.6s;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.personal-info {
    margin: 2rem 0;
}

.personal-info p {
    display: flex;
    align-items: center;
    margin-bottom: 0.8rem;
    color: var(--text-color);
}

.personal-info i {
    margin-right: 10px;
    color: var(--primary-color);
    width: 20px;
    text-align: center;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-light);
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

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

.about-image {
    position: relative;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    width: 350px;
    height: 450px;
    background: linear-gradient(45deg, #f1f5ff, #e3eeff);
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

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

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: var(--border-color);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -1px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
    box-sizing: border-box;
    margin-bottom: 30px;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-content {
    padding: 2rem;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    position: relative;
}

.timeline-item:nth-child(odd) .timeline-content::after {
    content: '';
    position: absolute;
    border-style: solid;
    width: 0;
    height: 0;
    top: 30px;
    right: -15px;
    border-width: 15px 0 15px 15px;
    border-color: transparent transparent transparent white;
}

.timeline-item:nth-child(even) .timeline-content::after {
    content: '';
    position: absolute;
    border-style: solid;
    width: 0;
    height: 0;
    top: 30px;
    left: -15px;
    border-width: 15px 15px 15px 0;
    border-color: transparent white transparent transparent;
}

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

.timeline-content h4 {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
}

.timeline-content ul {
    padding-left: 1.2rem;
}

.timeline-content li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.skill-category {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.skill-category h3 {
    margin-bottom: 1.5rem;
    color: var(--text-color);
    font-size: 1.3rem;
    position: relative;
    padding-bottom: 0.8rem;
}

.skill-category h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tags span {
    background-color: var(--bg-light);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.skill-tags span:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.project-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.project-image {
    height: 200px;
    background: linear-gradient(45deg, #f1f5ff, #e3eeff);
    position: relative;
    overflow: hidden;
}

.project-card h3 {
    padding: 1.5rem 1.5rem 0.5rem;
    color: var(--text-color);
    font-size: 1.3rem;
}

.project-card p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0 1.5rem 1.5rem;
}

.project-tags span {
    background-color: var(--bg-light);
    color: var(--text-secondary);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-link {
    display: block;
    padding: 0 1.5rem 1.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.project-link:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-details p {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.contact-details i {
    margin-right: 10px;
    color: var(--primary-color);
    width: 20px;
    text-align: center;
}

.contact-form {
    background: white;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: 'Inter', sans-serif;
    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 2px rgba(0, 113, 227, 0.2);
}

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

/* Footer */
.footer {
    background-color: #1d1d1f;
    color: #86868b;
    padding: 4rem 0 2rem;
}

.footer-content {
    text-align: center;
}

.footer-logo {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1.5rem;
    display: inline-block;
}

.footer p {
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2rem;
}

.footer-links a {
    color: #86868b;
    font-size: 1.2rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    transform: translateY(-3px);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
    animation-delay: var(--delay, 0s);
}

/* Responsive Styles */
@media (max-width: 992px) {
    .container {
        padding: 0 1.5rem;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-image {
        order: -1;
        margin-bottom: 2rem;
    }

    .image-placeholder {
        width: 100%;
        max-width: 400px;
        margin: 0 auto;
    }

    .timeline::after {
        left: 31px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 0;
    }

    .timeline-item:nth-child(even) {
        left: 0;
    }

    .timeline-item:nth-child(odd) .timeline-content::after,
    .timeline-item:nth-child(even) .timeline-content::after {
        left: 15px;
        border-width: 15px 15px 0 15px;
        border-color: white transparent transparent transparent;
        top: auto;
        bottom: -15px;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .nav-links {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        height: calc(100vh - 80px);
        padding: 2rem 0;
        transition: var(--transition);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }

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

    .nav-links li {
        margin: 1rem 0;
    }

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

    .hero .subtitle {
        font-size: 1.25rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .section-title {
        font-size: 2rem;
    }

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

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

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

    .btn {
        width: 100%;
    }
}