/* CSS Variables */
:root {
    --primary-color: #2C3E50;
    --secondary-color: #3498DB;
    --accent-color: #E74C3C;
    --background-color: #FFFFFF;
    --text-color: #34495E;
    --success-color: #27AE60;
    --light-gray: #F8F9FA;
    --border-color: #E9ECEF;
    --shadow: 0 2px 10px rgba(44, 62, 80, 0.1);
    --shadow-hover: 0 4px 20px rgba(44, 62, 80, 0.15);
    --transition: all 0.3s ease;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.8rem;
}

p {
    margin-bottom: 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    text-align: center;
}

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

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

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

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

/* Section Titles */
.section-title {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 3rem;
    position: relative;
    font-size: 2.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    border-radius: 2px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo-image {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--secondary-color);
    transition: var(--transition);
}

.logo-image:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--secondary-color);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, var(--light-gray) 0%, rgba(52, 152, 219, 0.1) 100%);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    animation: fadeInLeft 1s ease-out;
}

.greeting {
    display: block;
    font-size: 1.2rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-weight: 400;
}

.name {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-image {
    display: flex;
    justify-content: center;
    animation: fadeInRight 1s ease-out;
}

.profile-image {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--secondary-color);
    box-shadow: var(--shadow-hover);
    transition: var(--transition);
}

.profile-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 30px rgba(44, 62, 80, 0.2);
}

/* About Section */
.about {
    padding: 80px 0;
    background-color: var(--background-color);
}

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

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.stat {
    text-align: center;
    padding: 2rem;
    border-radius: 10px;
    background-color: var(--light-gray);
    transition: var(--transition);
}

.stat:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.stat h3 {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.stat p {
    color: var(--text-color);
    font-weight: 500;
    margin: 0;
}

/* Skills Section */
.skills {
    padding: 80px 0;
    background-color: var(--light-gray);
}

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

.skill-card {
    background-color: var(--background-color);
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.skill-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.skill-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.skill-card p {
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
}

/* Experience Section */
.experience {
    padding: 80px 0;
    background-color: var(--background-color);
}

.timeline {
    max-width: 800px;
    margin: 0 auto 4rem auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--secondary-color), var(--accent-color));
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: 30px;
    position: relative;
    margin: 3rem 0;
    width: 50%;
}

.timeline-item:nth-child(even) {
    align-self: flex-end;
    justify-content: flex-start;
    padding-left: 30px;
    padding-right: 0;
    margin-left: 50%;
}

.timeline-marker {
    position: absolute;
    right: -9px;
    top: 20px;
    width: 18px;
    height: 18px;
    background-color: var(--secondary-color);
    border-radius: 50%;
    border: 3px solid var(--background-color);
    box-shadow: var(--shadow);
}

.timeline-item:nth-child(even) .timeline-marker {
    left: -9px;
    right: auto;
}

.timeline-content {
    background-color: var(--light-gray);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 20px;
    right: -10px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent var(--light-gray);
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -10px;
    right: auto;
    border-width: 10px 10px 10px 0;
    border-color: transparent var(--light-gray) transparent transparent;
}

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

.timeline-content h4 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.timeline-date {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.education {
    margin-top: 4rem;
}

.education h3 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-size: 2rem;
}

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

.education-item {
    background-color: var(--light-gray);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.education-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.education-item h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.education-item p {
    color: var(--text-color);
    margin: 0;
}

/* Portfolio Section */
.portfolio {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2.5rem;
}

.portfolio-item {
    background-color: var(--background-color);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.portfolio-image {
    position: relative;
    text-align: center;
    margin-bottom: 1.5rem;
}

.portfolio-image i {
    font-size: 3.5rem;
    color: var(--secondary-color);
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.project-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.project-image:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-hover);
}

.project-badge {
    position: absolute;
    top: -15px;
    right: -15px;
    background: linear-gradient(135deg, var(--accent-color), #c0392b);
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(231, 76, 60, 0.3);
}

.portfolio-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.project-details {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding: 0.5rem 0;
}

.industry, .duration {
    font-size: 0.9rem;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-weight: 500;
}

.industry {
    background-color: rgba(52, 152, 219, 0.1);
    color: var(--secondary-color);
}

.duration {
    background-color: rgba(39, 174, 96, 0.1);
    color: var(--success-color);
}

.portfolio-item p {
    color: var(--text-color);
    margin-bottom: 1.5rem;
    line-height: 1.7;
    text-align: left;
}

.project-results {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.05), rgba(44, 62, 80, 0.05));
    border-radius: 12px;
}

.result-item {
    text-align: center;
}

.result-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.3rem;
}

.result-label {
    font-size: 0.85rem;
    color: var(--text-color);
    font-weight: 500;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.tag {
    background-color: var(--light-gray);
    color: var(--primary-color);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(52, 152, 219, 0.2);
    transition: var(--transition);
}

.tag:hover {
    background-color: var(--secondary-color);
    color: white;
    transform: translateY(-2px);
}

/* Social Links Portfolio Item */
.portfolio-item.social-links {
    background: linear-gradient(135deg, var(--light-gray), rgba(52, 152, 219, 0.05));
    border: 2px dashed var(--secondary-color);
}

.social-portfolio-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-portfolio-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid transparent;
}

.social-portfolio-link.youtube {
    background-color: rgba(255, 0, 0, 0.1);
    color: #FF0000;
    border-color: rgba(255, 0, 0, 0.2);
}

.social-portfolio-link.youtube:hover {
    background-color: #FF0000;
    color: white;
    transform: translateY(-3px);
}

.social-portfolio-link.facebook {
    background-color: rgba(24, 119, 242, 0.1);
    color: #1877F2;
    border-color: rgba(24, 119, 242, 0.2);
}

.social-portfolio-link.facebook:hover {
    background-color: #1877F2;
    color: white;
    transform: translateY(-3px);
}

.social-portfolio-link i {
    font-size: 1.5rem;
}

/* Portfolio Link (legacy support) */
.portfolio-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.portfolio-link:hover {
    color: var(--accent-color);
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background-color: var(--background-color);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3,
.contact-form h3 {
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-size: 1.8rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-top: 0.2rem;
}

.contact-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: var(--text-color);
    margin: 0;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--background-color);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    background-color: rgba(39, 174, 96, 0.1);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.form-message.error {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
}

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

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    color: white;
    font-size: 1.5rem;
    transition: var(--transition);
}

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

/* Animations */
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--background-color);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

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

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

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-image {
        order: -1;
    }

    .profile-image {
        width: 250px;
        height: 250px;
    }

    .name {
        font-size: 2.5rem !important;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

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

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 50px;
        padding-right: 0;
        margin-left: 0;
    }

    .timeline-item:nth-child(even) {
        margin-left: 0;
        padding-left: 50px;
        padding-right: 0;
    }

    .timeline-marker {
        left: 11px !important;
        right: auto;
    }

    .timeline-content::before {
        left: -10px !important;
        right: auto;
        border-width: 10px 10px 10px 0 !important;
        border-color: transparent var(--light-gray) transparent transparent !important;
    }

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

    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .portfolio-item {
        padding: 2rem;
    }

    .project-results {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 1rem;
    }

    .project-details {
        flex-direction: column;
        gap: 0.5rem;
        align-items: center;
    }

    .project-tags {
        justify-content: center;
    }

    .social-portfolio-links {
        gap: 0.8rem;
    }

    .social-portfolio-link {
        padding: 0.8rem 1rem;
        font-size: 0.9rem;
    }

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

    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

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

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.8rem;
    }

    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding-top: 100px;
    }

    .name {
        font-size: 2rem !important;
    }

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

    .profile-image {
        width: 200px;
        height: 200px;
    }

    .skill-card,
    .portfolio-item {
        padding: 2rem;
    }

    .timeline-content {
        padding: 1.5rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}