:root {
    --primary: #2c3e50;
    --secondary: #3498db;
    --accent: #e74c3c;
    --light: #ecf0f1;
    --dark: #2c3e50;
    --gray: #95a5a6;
    --bg-light: #f8f9fa;
    --bg-dark: #1a252f;
    --transition: all 0.3s ease;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
}

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

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: var(--bg-light);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--dark);
}

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

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

section {
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.section-title {
    position: relative;
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 60px;
    color: var(--secondary);
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 4px;
    background: var(--primary);
    border-radius: 2px;
}

/* Header Styles */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow);
    padding: 15px 0;
    transition: var(--transition);
}

header.scrolled {
    padding: 10px 0;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
}

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

.nav-menu {
    display: flex;
    list-style: none;
}

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

.nav-menu a {
    font-weight: 500;
    font-size: 1.1rem;
    color: var(--dark);
    position: relative;
}

.nav-menu a:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

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

.hamburger {
    display: none;
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 100px 0 50px;
    position: relative;
}

.hero .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 5%;
    position: relative;
    z-index: 2;
}

.hero-content {
    flex: 0 0 55%;
    max-width: 55%;
}

.hero-img-container {
    flex: 0 0 40%;
    max-width: 40%;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-img {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    animation: float 6s ease-in-out infinite;
}



.hero-title {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--dark);
}

.hero-subtitle {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 30px;
}

.hero-text {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: #555;
}

.hero-btns {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 1rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: #1a252f;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* Terminal effect */
.terminal-effect {
    background: #1e1e1e;
    color: #f0f0f0;
    border-radius: 10px;
    padding: 20px;
    font-family: 'Courier New', monospace;
    margin-top: 30px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.terminal-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.terminal-dots {
    display: flex;
    gap: 8px;
    margin-right: 10px;
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }

.terminal-title {
    font-size: 0.9rem;
    color: #999;
}

.terminal-content {
    line-height: 1.8;
    font-size: 1rem;
}

.terminal-content .prompt {
    color: #4cd137;
}

.terminal-content .command {
    color: #3498db;
}

.terminal-content .output {
    color: #f0f0f0;
    display: block;
    margin-top: 5px;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-img {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    height: 100%;
    display: flex;
    align-items: center;
}

.about-img img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
    object-fit: cover;
}

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

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--secondary);
}

.about-text p {
    margin-bottom: 20px;
    color: #555;
}

.about-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.info-item {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.info-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 4px;
}

.info-icon i {
    font-size: 1.2rem;
    color: var(--primary);
}

.info-text {
    flex: 1;
}

.info-text h4 {
    font-size: 0.95rem;
    margin-bottom: 5px;
    color: var(--gray);
    font-weight: 500;
}

.info-text p {
    margin: 0;
    font-weight: 500;
    color: var(--dark);
    font-size: 1.05rem;
}

/* Skills Section */
.skills {
    background-color: var(--bg-light);
    z-index: 1;
}

.skills-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    position: relative;
    z-index: 2;
}

.skills-category {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    backdrop-filter: blur(5px);
    background: rgba(255, 255, 255, 0.95);
}

.skills-category:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.skills-category h3 {
    font-size: 1.5rem;
    color: var(--secondary);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
}

.skills-category h3 i {
    margin-right: 10px;
    color: var(--primary);
}

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

.skill-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.skill-name {
    font-weight: 500;
    color: var(--dark);
}

.skill-percentage {
    font-weight: 500;
    color: var(--primary);
}

.skill-bar {
    height: 10px;
    background: #e0e0e0;
    border-radius: 5px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--primary);
    border-radius: 5px;
    position: relative;
    width: 0;
    opacity: 0;
    transition: width 1.8s ease-out, opacity 1s ease-out;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.skill-tag {
    background: rgba(44, 62, 80, 0.1);
    padding: 10px 15px;
    border-radius: 30px;
    text-align: center;
    font-weight: 500;
    transition: var(--transition);
}

.skill-tag:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
}

/* Background Circles for Skills */
.skills-bg-elements {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
    overflow: hidden;
}

.skills .bg-circle {
    position: absolute;
    border-radius: 50%;
    animation: float 15s infinite linear;
    opacity: 0.1;
}


/* Experience Section */
.experience {
    background-color: white;
}

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

.timeline:before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: var(--primary);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    width: 100%;
}

.timeline-item:nth-child(odd) {
    padding-right: calc(50% + 30px);
    text-align: right;
}

.timeline-item:nth-child(even) {
    padding-left: calc(50% + 30px);
}

.timeline-dot {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    border: 4px solid white;
    z-index: 1;
}

.timeline-content {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.timeline-date {
    display: inline-block;
    padding: 5px 15px;
    background: var(--primary);
    color: white;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.timeline-title {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: var(--secondary);
}

.timeline-company {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 15px;
    display: block;
}

/* Education Section */
.education {
    background-color: var(--bg-light);
}

.education-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
    gap: 30px;
}

.education-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.education-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.education-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.education-title {
    font-size: 1.4rem;
    color: var(--secondary);
}

.education-date {
    background: var(--primary);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.education-university {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 15px;
    display: block;
}

.education-specialty {
    margin-bottom: 15px;
    font-weight: 500;
}

/* Contact Section */
.contact {
    background: white;
    z-index: 1;
}

.contact-container {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    width: 100%;
}

.contact-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    backdrop-filter: blur(5px);
    transform: translateY(20px);
    opacity: 0;
}

.contact-item.animate-in {
    transform: translateY(0);
    opacity: 1;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.contact-icon i {
    font-size: 1.5rem;
    color: white;
}

.contact-item:hover .contact-icon {
    transform: scale(1.1);
    background: var(--accent);
}

.contact-text h4 {
    font-size: 1.3rem;
    margin-bottom: 5px;
    color: var(--secondary);
}

.contact-text p, .contact-text a {
    color: #555;
    margin: 0;
    transition: var(--transition);
}

.contact-text a {
    position: relative;
    display: inline-block;
}

.contact-text a:after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

.contact-text a:hover {
    color: var(--accent);
}

.contact-text a:hover:after {
    width: 100%;
}

/* Ripple effect */
.contact-icon:after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%, -50%);
    transform-origin: 50% 50%;
}

.contact-item:active .contact-icon:after {
    animation: ripple 0.6s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 1;
    }
    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}



/* Footer */
footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    font-size: 1.5rem;
    margin-bottom: 25px;
    color: white;
    position: relative;
    padding-bottom: 15px;
}

.footer-col h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--primary);
}

.footer-col p {
    color: #bbb;
    margin-bottom: 20px;
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary);
    transform: translateY(-5px);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #bbb;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
    padding-left: 5px;
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #bbb;
    font-size: 0.9rem;
}

/* Notification */
.notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary);
    color: white;
    padding: 10px 20px;
    border-radius: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    z-index: 1000;
    animation: fadeInOut 2s ease-in-out;
    display: none;
}

@keyframes fadeInOut {
    0% { opacity: 0; transform: translateX(-50%) translateY(20px); }
    20% { opacity: 1; transform: translateX(-50%) translateY(0); }
    80% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(-20px); }
}

/* Responsive */
@media (max-width: 1200px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.6rem;
    }
}

@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
    }
    
    .hero-content,
    .hero-img-container {
        flex: 0 0 100%;
        max-width: 100%;
    }
    
    .hero-img-container {
        margin-top: 50px;
        max-width: 80%;
    }
    
    .hero-img {
        animation: none;
    }
    
    .about-content,
    .skills-container {
        grid-template-columns: 1fr;
    }
    
    .timeline:before {
        left: 30px;
    }
    
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        padding: 0 0 0 70px;
        text-align: left;
    }
    
    .timeline-dot {
        left: 30px;
    }
    
    .footer-container {
        grid-template-columns: repeat(2, 1fr);
    }

    .education-container {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .about-img {
        max-width: 80%;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 70%;
        height: calc(100vh - 70px);
        background: white;
        flex-direction: column;
        align-items: center;
        padding-top: 40px;
        transition: var(--transition);
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu li {
        margin: 15px 0;
    }
    
    .hamburger {
        display: block;
    }
    
    .hero {
        padding-top: 120px;
        text-align: center;
        min-height: auto;
    }
    
    .hero-content {
        margin: 0 auto;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .hero-img-container {
        max-width: 100%;
        margin-top: 40px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.4rem;
    }
    
    .terminal-effect {
        text-align: left;
    }

    /* Hide background circles on mobile */
    .skills .bg-circle,
    .contact .bg-circle {
        display: none;
    }
}

@media (max-width: 576px) {
    .footer-container {
        grid-template-columns: 1fr;
    }
    
    .info-item {
        grid-column: span 2;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .education-container {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .about-info {
        grid-template-columns: 1fr;
    }
    
    .hero-btns {
        flex-direction: column;
        gap: 10px;
    }
    
    .btn {
        width: 100%;
    }
}