/* Base Styles */
:root {
    --black: #000000;
    --white: #ffffff;
    --dark-gray: #121212;
    --medium-gray: #1e1e1e;
    --light-gray: #333333;
    --text-gray: #a0a0a0;
    --green: #1DB954;
    --green-hover: #1ed760;
    --transition: all 0.3s ease;
    --border-radius: 4px;
}

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

html {
    scroll-behavior: smooth;
}

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

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

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

@keyframes progressBar {
    from { width: 0; }
    to { width: var(--progress); }
}

.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 0;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--light-gray);
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--white);
}

.desktop-nav ul {
    display: flex;
    gap: 30px;
}

.desktop-nav a {
    color: var(--text-gray);
    transition: var(--transition);
    position: relative;
}

.desktop-nav a:hover {
    color: var(--green);
}

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--white);
    transition: var(--transition);
}

.mobile-menu-btn.open span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.mobile-menu-btn.open span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.open span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

.mobile-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    height: 0;
    background-color: var(--black);
    overflow: hidden;
    transition: var(--transition);
    z-index: 999;
}

.mobile-menu.open {
    height: calc(100vh - 70px);
    border-top: 1px solid var(--light-gray);
}

.mobile-menu ul {
    padding: 30px;
}

.mobile-menu li {
    margin-bottom: 20px;
}

.mobile-menu a {
    display: block;
    font-size: 18px;
    color: var(--text-gray);
    transition: var(--transition);
    padding: 10px 0;
}

.mobile-menu a:hover {
    color: var(--green);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 0 50px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

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

.highlight {
    color: var(--green);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--light-gray);
    border-radius: 50%;
    color: var(--text-gray);
    transition: var(--transition);
}

.social-icon:hover {
    background-color: var(--green);
    color: var(--black);
    transform: translateY(-3px);
}

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

.primary-btn {
    background-color: var(--green);
    color: var(--black);
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
}

.primary-btn:hover {
    background-color: var(--green-hover);
    transform: translateY(-3px);
}

.secondary-btn {
    background-color: transparent;
    color: var(--white);
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    border: 1px solid var(--light-gray);
    transition: var(--transition);
}

.secondary-btn:hover {
    border-color: var(--green);
    color: var(--green);
    transform: translateY(-3px);
}

/* Section Styles */
.section {
    padding: 80px 0;
    border-bottom: 1px solid var(--light-gray);
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-title {
    font-size: 2rem;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--green);
}

.section-description {
    color: var(--text-gray);
    max-width: 800px;
    margin-bottom: 40px;
}

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

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

.image-container {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--green);
}

.image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-gray);
}

.about-intro {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--white) !important;
}

.about-details {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin: 30px 0;
}

.detail-item h3 {
    font-size: 1rem;
    margin-bottom: 5px;
    color: var(--green);
}

.detail-item p {
    margin-bottom: 0;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: bold;
    color: var(--green);
    margin-bottom: 5px;
}

.stat-label {
    color: var(--text-gray);
    font-size: 0.9rem;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background-color: var(--light-gray);
    color: var(--white);
    padding: 12px 24px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.download-btn:hover {
    background-color: var(--green);
    color: var(--black);
    transform: translateY(-3px);
}

/* Tools Section */
.tools-categories {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.category-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--green);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.tool-card {
    background-color: var(--medium-gray);
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.tool-card:hover {
    background-color: var(--light-gray);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.tool-card i {
    font-size: 2rem;
    color: var(--green);
    margin-bottom: 15px;
}

.tool-card h4 {
    margin-bottom: 10px;
}

.tool-card p {
    font-size: 0.9rem;
    color: var(--text-gray);
}

/* Skills Section */
.skills-tabs {
    margin-top: 30px;
}

.tabs-header {
    display: flex;
    border-bottom: 1px solid var(--light-gray);
    margin-bottom: 30px;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-gray);
    padding: 10px 20px;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--white);
}

.tab-btn.active {
    color: var(--green);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--green);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.skills-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.skill {
    margin-bottom: 25px;
}

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

.skill-name {
    font-weight: 500;
}

.skill-percentage {
    color: var(--text-gray);
}

.skill-bar {
    height: 8px;
    background-color: var(--light-gray);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background-color: var(--green);
    border-radius: 4px;
    animation: progressBar 1.5s ease-out forwards;
    --progress: 0%;
}

.skill-description {
    margin-top: 8px;
    font-size: 0.9rem;
    color: var(--text-gray);
}

/* Portfolio Section */
.portfolio-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
}

.filter-btn {
    background: none;
    border: 1px solid var(--light-gray);
    color: var(--text-gray);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: var(--green);
    color: var(--green);
}

.filter-btn.active {
    background-color: var(--green);
    border-color: var(--green);
    color: var(--black);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.project-card {
    background-color: var(--medium-gray);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.project-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

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

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.overlay-content {
    display: flex;
    gap: 15px;
}

.view-project, .view-code {
    background-color: var(--green);
    color: var(--black);
    padding: 8px 16px;
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
}

.view-project:hover, .view-code:hover {
    background-color: var(--green-hover);
    transform: translateY(-3px);
}

.project-content {
    padding: 25px;
}

.project-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.project-description {
    color: var(--text-gray);
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.project-features {
    margin-bottom: 15px;
    background-color: var(--dark-gray);
    padding: 15px;
    border-radius: var(--border-radius);
}

.project-features h4 {
    margin-bottom: 10px;
    color: var(--green);
    font-size: 0.9rem;
}

.project-features ul {
    list-style: disc;
    padding-left: 20px;
}

.project-features li {
    color: var(--text-gray);
    font-size: 0.85rem;
    margin-bottom: 5px;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

.tag {
    background-color: var(--light-gray);
    color: var(--text-gray);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    color: var(--text-gray);
    font-size: 0.9rem;
    transition: var(--transition);
}

.project-link i {
    margin-left: 5px;
    font-size: 0.8rem;
}

.project-link:hover {
    color: var(--green);
}

.portfolio-cta {
    margin-top: 50px;
    text-align: center;
}

.portfolio-cta p {
    color: var(--text-gray);
    margin-bottom: 20px;
}

.github-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background-color: var(--light-gray);
    color: var(--white);
    padding: 12px 24px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.github-btn:hover {
    background-color: var(--green);
    color: var(--black);
    transform: translateY(-3px);
}

/* Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.contact-card {
    background-color: var(--medium-gray);
    padding: 30px;
    border-radius: var(--border-radius);
    height: 100%;
}

.contact-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--green);
}

.contact-card p {
    color: var(--text-gray);
    margin-bottom: 30px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-gray);
}

.contact-item i {
    color: var(--green);
    width: 20px;
    text-align: center;
}

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

.social-link {
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-gray);
    transition: var(--transition);
}

.social-link i {
    width: 20px;
    text-align: center;
}

.social-link:hover {
    color: var(--green);
    transform: translateX(5px);
}

.contact-form {
    background-color: var(--medium-gray);
    padding: 30px;
    border-radius: var(--border-radius);
}

.form-header {
    margin-bottom: 25px;
}

.form-header h3 {
    font-size: 1.5rem;
    margin-bottom: 5px;
    color: var(--green);
}

.form-header p {
    color: var(--text-gray);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-gray);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    background-color: var(--dark-gray);
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
    color: var(--white);
    font-family: inherit;
    resize: none;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--green);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-gray);
    opacity: 0.7;
}

.submit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    background-color: var(--green);
    color: var(--black);
    border: none;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    background-color: var(--green-hover);
    transform: translateY(-3px);
}

.contact-cta {
    margin-top: 50px;
    text-align: center;
    background-color: var(--medium-gray);
    padding: 40px;
    border-radius: var(--border-radius);
}

.contact-cta h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.contact-cta p {
    color: var(--text-gray);
    margin-bottom: 20px;
}

.availability-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background-color: var(--green);
    color: var(--black);
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
}

.availability-btn:hover {
    background-color: var(--green-hover);
    transform: translateY(-3px);
}

/* Footer */
footer {
    padding: 50px 0 30px;
    background-color: var(--dark-gray);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    margin-bottom: 15px;
}

.footer-logo p {
    color: var(--text-gray);
    margin-top: 10px;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.footer-column h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--green);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-column a {
    color: var(--text-gray);
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--green);
}

.footer-newsletter h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--green);
}

.footer-newsletter p {
    color: var(--text-gray);
    margin-bottom: 20px;
}

.newsletter-form {
    display: flex;
    gap: 10px;
}

.newsletter-form input {
    flex: 1;
    padding: 10px;
    background-color: var(--medium-gray);
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
    color: var(--white);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--green);
}

.newsletter-form button {
    background-color: var(--green);
    color: var(--black);
    border: none;
    padding: 10px 15px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.newsletter-form button:hover {
    background-color: var(--green-hover);
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding-top: 30px;
    border-top: 1px solid var(--light-gray);
}

.copyright {
    color: var(--text-gray);
    font-size: 0.9rem;
}

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

/* Additional Animations */
.tool-card:hover {
    animation: pulse 1s infinite;
}

.project-card {
    opacity: 0;
    animation: fadeIn 0.5s ease forwards;
    animation-delay: calc(var(--i, 0) * 0.1s);
}

.project-card:nth-child(1) { --i: 1; }
.project-card:nth-child(2) { --i: 2; }
.project-card:nth-child(3) { --i: 3; }
.project-card:nth-child(4) { --i: 4; }

/* Media Queries */
@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: 300px 1fr;
    }
    
    .skills-container {
        grid-template-columns: 1fr 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-container {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr 1fr;
    }
    
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

@media (max-width: 767px) {
    .desktop-nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tabs-header {
        overflow-x: auto;
        padding-bottom: 10px;
    }
    
    .portfolio-filters {
        overflow-x: auto;
        padding-bottom: 10px;
        justify-content: flex-start;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
}