:root {
    --primary: #0a192f;
    --secondary: #64ffda;
    --text-primary: #e6f1ff;
    --text-secondary: #8892b0;
    --accent: #112240;
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

/* Loading Screen */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--primary);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loading-screen.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loader {
    text-align: center;
    width: 100%;
    max-width: 500px;
    padding: 0 20px;
}

.loader-text {
    margin-bottom: 30px;
}

.loader-name {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.loader-title {
    display: block;
    font-size: 1rem;
    color: var(--secondary);
    font-weight: 400;
}

.loader-progress {
    width: 100%;
    height: 2px;
    background-color: var(--accent);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background-color: var(--secondary);
    animation: loading 2s ease-in-out forwards;
}

@keyframes loading {
    0% { width: 0%; }
    100% { width: 100%; }
}

/* Navigation */
#navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 0;
    background-color: rgba(10, 25, 47, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
}

#navbar.scrolled {
    padding: 15px 0;
    box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary);
    text-decoration: none;
}

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

.nav-links li {
    margin-left: 40px;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

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

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

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

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 0 40px;
}

#particle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
    align-items: center;
}

.hero-greeting {
    color: var(--secondary);
    font-size: 1.1rem;
    font-weight: 400;
    margin-bottom: 10px;
}

.hero-name {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
    line-height: 1.1;
}

.hero-title {
    font-size: clamp(1.5rem, 4vw, 3rem);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.1;
}

.hero-description {
    max-width: 540px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-size: 1.1rem;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid var(--secondary);
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px -10px rgba(100, 255, 218, 0.5);
}

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

.btn-outline:hover {
    background-color: rgba(100, 255, 218, 0.1);
    transform: translateY(-3px);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.floating-card {
    width: 300px;
    height: 200px;
    background-color: var(--accent);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
    animation: float 6s ease-in-out infinite;
    position: relative;
    overflow: hidden;
}

.floating-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--secondary), transparent);
}

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

.code-line {
    height: 12px;
    background-color: rgba(100, 255, 218, 0.2);
    margin-bottom: 10px;
    border-radius: 2px;
}

.code-line.short {
    width: 70%;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.arrow {
    width: 1px;
    height: 30px;
    background-color: var(--text-secondary);
    margin-top: 5px;
    position: relative;
}

.arrow::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: -4px;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 6px solid var(--text-secondary);
}

/* Sections Common Styles */
section {
    padding: 100px 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 60px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    bottom: -10px;
    left: 0;
    background-color: var(--secondary);
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

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

.image-container {
    position: relative;
    width: 250px;
    height: 250px;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background-color: var(--accent);
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 5rem;
    color: var(--secondary);
}

.image-frame {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--secondary);
    border-radius: 10px;
    z-index: -1;
    transition: var(--transition);
}

.image-container:hover .image-frame {
    top: 10px;
    left: 10px;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.skill-category {
    background-color: var(--accent);
    padding: 30px;
    border-radius: 8px;
    transition: var(--transition);
}

.skill-category:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

.skill-category h3 {
    color: var(--secondary);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

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

.skill-name {
    flex: 1;
    font-size: 0.9rem;
}

.skill-bar {
    flex: 2;
    height: 8px;
    background-color: rgba(136, 146, 176, 0.2);
    border-radius: 4px;
    margin: 0 15px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background-color: var(--secondary);
    border-radius: 4px;
    width: 0;
    transition: width 1.5s ease-in-out;
}

.skill-percent {
    width: 80px;
    text-align: right;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Tools Section */
.tools-content {
    margin-bottom: 40px;
}

.tools-description {
    max-width: 600px;
    margin-bottom: 40px;
}

.tools-description p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.tool-category {
    background-color: var(--accent);
    padding: 30px;
    border-radius: 8px;
    transition: var(--transition);
}

.tool-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

.tool-category h3 {
    color: var(--secondary);
    margin-bottom: 25px;
    font-size: 1.3rem;
    border-bottom: 1px solid rgba(100, 255, 218, 0.2);
    padding-bottom: 10px;
}

.tools-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.tool-item {
    display: flex;
    gap: 15px;
    padding: 15px;
    background-color: rgba(17, 34, 64, 0.5);
    border-radius: 6px;
    transition: var(--transition);
}

.tool-item:hover {
    background-color: rgba(100, 255, 218, 0.1);
    transform: translateX(5px);
}

.tool-icon {
    font-size: 1.5rem;
    color: var(--secondary);
    display: flex;
    align-items: flex-start;
    padding-top: 5px;
}

.tool-info h4 {
    color: var(--text-primary);
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.tool-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.tool-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.tool-tags span {
    background-color: rgba(100, 255, 218, 0.1);
    color: var(--secondary);
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 0.7rem;
    font-weight: 500;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.project-card {
    background-color: var(--accent);
    padding: 30px;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--secondary), transparent);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

.project-icon {
    font-size: 2.5rem;
    color: var(--secondary);
    margin-bottom: 20px;
}

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

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.project-tech span {
    background-color: rgba(100, 255, 218, 0.1);
    color: var(--secondary);
    padding: 5px 10px;
    border-radius: 3px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Philosophy Section */
.philosophy-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.philosophy-text blockquote {
    font-size: 1.8rem;
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 20px;
    border-left: 3px solid var(--secondary);
    padding-left: 20px;
    font-style: italic;
}

.philosophy-text p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
}

.philosophy-text em {
    color: var(--secondary);
    font-style: normal;
}

.goals h3 {
    color: var(--secondary);
    margin-bottom: 30px;
    font-size: 1.5rem;
}

.goals-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.goal-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background-color: var(--accent);
    border-radius: 8px;
    transition: var(--transition);
}

.goal-item:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 15px -5px rgba(2, 12, 27, 0.5);
}

.goal-icon {
    font-size: 1.5rem;
    color: var(--secondary);
    display: flex;
    align-items: flex-start;
    padding-top: 5px;
}

.goal-content h4 {
    color: var(--text-primary);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.goal-content p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.contact-item i {
    color: var(--secondary);
    font-size: 1.2rem;
    width: 20px;
}

.contact-item span {
    color: var(--text-secondary);
    transition: var(--transition);
}

.contact-item:hover span {
    color: var(--text-primary);
}

.contact-form {
    background-color: var(--accent);
    padding: 30px;
    border-radius: 8px;
}

.form-group {
    position: relative;
    margin-bottom: 30px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px 0;
    background-color: transparent;
    border: none;
    border-bottom: 1px solid var(--text-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group label {
    position: absolute;
    top: 10px;
    left: 0;
    color: var(--text-secondary);
    font-size: 1rem;
    pointer-events: none;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-bottom: 1px solid var(--secondary);
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:valid + label,
.form-group textarea:valid + label {
    top: -20px;
    font-size: 0.8rem;
    color: var(--secondary);
}

/* Footer */
.footer {
    background-color: var(--accent);
    padding: 50px 0 30px;
    text-align: center;
}

.footer-content {
    max-width: 600px;
    margin: 0 auto;
}

.footer-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary);
    text-decoration: none;
    margin-bottom: 20px;
    display: inline-block;
}

.footer-text {
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 1rem;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
}

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

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

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

/* Responsive Design */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .philosophy-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .hero {
        padding: 0 20px;
    }
    
    .skills-grid,
    .tools-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 200px;
        text-align: center;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}