/* CSS Custom Properties */
:root {
    /* Colors */
    --primary-blue: 220 100% 50%;
    --secondary-blue: 210 100% 60%;
    --dark-blue: 220 100% 20%;
    --accent-blue: 195 100% 55%;
    --black: 0 0% 8%;
    --dark-gray: 0 0% 15%;
    --medium-gray: 0 0% 25%;
    --light-gray: 0 0% 85%;
    --white: 0 0% 100%;
    --success: 120 100% 40%;
    --error: 0 100% 50%;
    
    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 10px hsla(var(--black), 0.1);
    --shadow-md: 0 4px 20px hsla(var(--black), 0.15);
    --shadow-lg: 0 8px 30px hsla(var(--black), 0.2);
    --shadow-blue: 0 0 20px hsla(var(--primary-blue), 0.3);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-secondary);
    background: hsl(var(--black));
    color: hsl(var(--white));
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: hsla(var(--black), 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition-medium);
    border-bottom: 1px solid hsla(var(--primary-blue), 0.2);
}

.navbar.scrolled {
    background: hsla(var(--black), 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo .logo-text {
    font-family: var(--font-primary);
    font-size: 1.8rem;
    font-weight: 900;
    color: hsl(var(--white));
}

.nav-logo .accent {
    color: hsl(var(--primary-blue));
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    color: hsl(var(--light-gray));
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition-fast);
    position: relative;
}

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

.nav-link:hover {
    color: hsl(var(--primary-blue));
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.bar {
    width: 25px;
    height: 3px;
    background: hsl(var(--white));
    transition: var(--transition-medium);
    border-radius: 2px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, hsl(var(--black)) 0%, hsl(var(--dark-gray)) 100%);
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    width: 100%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
    min-height: 80vh;
}

.hero-text {
    animation: fadeInUp 1s ease-out;
}

.hero-name {
    font-family: var(--font-primary);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, hsl(var(--primary-blue)), hsl(var(--accent-blue)));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glow 2s ease-in-out infinite alternate;
}

.hero-tagline {
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    color: hsl(var(--light-gray));
    margin-bottom: var(--spacing-xl);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    align-items: center;
}

.tagline-part {
    opacity: 0;
    animation: fadeInSequence 0.8s ease-out forwards;
}

.tagline-part:nth-child(1) { animation-delay: 0.5s; }
.tagline-part:nth-child(3) { animation-delay: 0.8s; }
.tagline-part:nth-child(5) { animation-delay: 1.1s; }

.separator {
    color: hsl(var(--primary-blue));
    font-weight: bold;
    opacity: 0;
    animation: fadeInSequence 0.8s ease-out forwards;
}

.separator:nth-child(2) { animation-delay: 0.65s; }
.separator:nth-child(4) { animation-delay: 0.95s; }

.cta-button {
    background: linear-gradient(135deg, hsl(var(--primary-blue)), hsl(var(--accent-blue)));
    color: hsl(var(--white));
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
    font-family: var(--font-secondary);
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, hsla(var(--white), 0.2), transparent);
    transition: var(--transition-slow);
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out 0.5s both;
}

.code-animation {
    background: hsl(var(--dark-gray));
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid hsla(var(--primary-blue), 0.3);
    box-shadow: var(--shadow-lg);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.code-animation::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 30px;
    background: linear-gradient(90deg, hsl(var(--primary-blue)), hsl(var(--accent-blue)));
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.code-line {
    margin: var(--spacing-sm) 0;
    opacity: 0;
    animation: typeIn 0.5s ease-out forwards;
}

.code-line:nth-child(1) { animation-delay: 1s; }
.code-line:nth-child(2) { animation-delay: 1.3s; }
.code-line:nth-child(3) { animation-delay: 1.6s; }
.code-line:nth-child(4) { animation-delay: 1.9s; }

.code-indent {
    padding-left: var(--spacing-lg);
}

.code-keyword { color: hsl(var(--primary-blue)); }
.code-variable { color: hsl(var(--accent-blue)); }
.code-string { color: hsl(var(--success)); }
.code-function { color: hsl(300 100% 70%); }
.code-operator, .code-bracket { color: hsl(var(--white)); }

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    color: hsl(var(--primary-blue));
    font-size: 1.5rem;
}

.hero-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="1" fill="%23007BFF" opacity="0.3"><animate attributeName="opacity" values="0.3;1;0.3" dur="3s" repeatCount="indefinite"/></circle><circle cx="80" cy="40" r="1" fill="%2300D4FF" opacity="0.5"><animate attributeName="opacity" values="0.5;1;0.5" dur="2s" repeatCount="indefinite"/></circle><circle cx="40" cy="80" r="1" fill="%23007BFF" opacity="0.4"><animate attributeName="opacity" values="0.4;1;0.4" dur="4s" repeatCount="indefinite"/></circle></svg>') repeat;
    opacity: 0.1;
    animation: float 20s linear infinite;
}

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section-title {
    font-family: var(--font-primary);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: hsl(var(--white));
    margin-bottom: var(--spacing-md);
}

.section-divider {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, hsl(var(--primary-blue)), hsl(var(--accent-blue)));
    margin: 0 auto var(--spacing-md);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: hsl(var(--light-gray));
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about {
    padding: var(--spacing-xxl) 0;
    background: hsl(var(--dark-gray));
}

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

.about-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: hsl(var(--light-gray));
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: hsl(var(--medium-gray));
    border-radius: var(--radius-md);
    border: 1px solid hsla(var(--primary-blue), 0.2);
    transition: var(--transition-medium);
}

.highlight-item:hover {
    background: hsl(var(--black));
    border-color: hsl(var(--primary-blue));
    transform: translateY(-2px);
}

.highlight-item i {
    color: hsl(var(--primary-blue));
    font-size: 1.2rem;
}

/* Skills Section */
.skills {
    padding: var(--spacing-xxl) 0;
    background: hsl(var(--black));
}

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

.skill-category {
    background: hsl(var(--dark-gray));
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid hsla(var(--primary-blue), 0.2);
    transition: var(--transition-medium);
}

.skill-category:hover {
    border-color: hsl(var(--primary-blue));
    box-shadow: var(--shadow-blue);
}

.category-title {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 700;
    color: hsl(var(--primary-blue));
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.skills-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
}

.skill-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: hsl(var(--medium-gray));
    border-radius: var(--radius-md);
    transition: var(--transition-medium);
    cursor: pointer;
}

.skill-item:hover {
    background: hsl(var(--black));
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.skill-item i {
    font-size: 2rem;
    color: hsl(var(--accent-blue));
}

.skill-item span {
    font-weight: 500;
    text-align: center;
    font-size: 0.9rem;
}

/* Projects Section */
.projects {
    padding: var(--spacing-xxl) 0;
    background: hsl(var(--dark-gray));
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background: hsl(var(--black));
    border-radius: var(--radius-lg);
    border: 1px solid hsla(var(--primary-blue), 0.2);
    overflow: hidden;
    transition: var(--transition-medium);
    position: relative;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, hsl(var(--primary-blue)), hsl(var(--accent-blue)));
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: hsl(var(--primary-blue));
}

.project-header {
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.project-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, hsl(var(--primary-blue)), hsl(var(--accent-blue)));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: hsl(var(--white));
    font-size: 1.5rem;
}

.project-title {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 700;
    color: hsl(var(--white));
}

.project-content {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.project-description {
    color: hsl(var(--light-gray));
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.project-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.feature-tag {
    background: hsl(var(--dark-gray));
    color: hsl(var(--accent-blue));
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid hsla(var(--accent-blue), 0.3);
}

.project-links {
    display: flex;
    gap: var(--spacing-md);
}

.project-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: hsl(var(--primary-blue));
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}

.project-link:hover {
    color: hsl(var(--accent-blue));
}

/* Contact Section */
.contact {
    padding: var(--spacing-xxl) 0;
    background: hsl(var(--black));
}

.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xxl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-form {
    background: hsl(var(--dark-gray));
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid hsla(var(--primary-blue), 0.2);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: hsl(var(--white));
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: hsl(var(--medium-gray));
    border: 1px solid hsla(var(--primary-blue), 0.2);
    border-radius: var(--radius-md);
    color: hsl(var(--white));
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-medium);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: hsl(var(--primary-blue));
    box-shadow: 0 0 0 3px hsla(var(--primary-blue), 0.2);
}

.error-message {
    display: block;
    color: hsl(var(--error));
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
    opacity: 0;
    transition: var(--transition-fast);
}

.error-message.show {
    opacity: 1;
}

.submit-btn {
    background: linear-gradient(135deg, hsl(var(--primary-blue)), hsl(var(--accent-blue)));
    color: hsl(var(--white));
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: var(--transition-medium);
    width: 100%;
    justify-content: center;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: hsl(var(--dark-gray));
    border-radius: var(--radius-md);
    border: 1px solid hsla(var(--primary-blue), 0.2);
    transition: var(--transition-medium);
}

.contact-item:hover {
    border-color: hsl(var(--primary-blue));
    transform: translateX(5px);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, hsl(var(--primary-blue)), hsl(var(--accent-blue)));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: hsl(var(--white));
    font-size: 1.2rem;
}

.contact-details h4 {
    color: hsl(var(--white));
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.contact-details p {
    color: hsl(var(--light-gray));
    font-size: 0.9rem;
}

/* Footer */
.footer {
    padding: var(--spacing-lg) 0;
    background: hsl(var(--dark-gray));
    border-top: 1px solid hsla(var(--primary-blue), 0.2);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: hsl(var(--light-gray));
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: hsl(var(--medium-gray));
    color: hsl(var(--light-gray));
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: var(--transition-medium);
}

.social-link:hover {
    background: hsl(var(--primary-blue));
    color: hsl(var(--white));
    transform: translateY(-2px);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInSequence {
    to {
        opacity: 1;
    }
}

@keyframes typeIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes glow {
    from {
        text-shadow: 0 0 20px hsla(var(--primary-blue), 0.5);
    }
    to {
        text-shadow: 0 0 30px hsla(var(--primary-blue), 0.8), 0 0 40px hsla(var(--accent-blue), 0.5);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    40% {
        transform: translateY(-10px) translateX(-50%);
    }
    60% {
        transform: translateY(-5px) translateX(-50%);
    }
}

@keyframes float {
    from {
        transform: translateY(0px);
    }
    to {
        transform: translateY(-20px);
    }
}

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

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

    .hamburger {
        display: flex;
    }

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

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .hero-visual {
        order: -1;
    }

    .code-animation {
        font-size: 0.8rem;
        padding: var(--spacing-md);
    }

    .hero-tagline {
        justify-content: center;
    }

    .about-highlights {
        grid-template-columns: 1fr;
    }

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

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .container {
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2.5rem;
    }

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

    .nav-container {
        padding: 0 var(--spacing-md);
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .skills-list {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .project-card {
        margin: 0 var(--spacing-xs);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus states for keyboard navigation */
.nav-link:focus,
.cta-button:focus,
.submit-btn:focus,
.social-link:focus {
    outline: 2px solid hsl(var(--primary-blue));
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-blue: 220 100% 60%;
        --accent-blue: 195 100% 65%;
        --light-gray: 0 0% 90%;
    }
}


.contact-link {
    text-decoration: none;
    color: inherit;
}