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

:root {
    /* Color Palette */
    --primary-blue: #1e3a8a;
    --primary-purple: #7c3aed;
    --primary-teal: #0891b2;
    --accent-orange: #f97316;
    --accent-pink: #ec4899;
    --success-green: #10b981;
    --warning-yellow: #f59e0b;
    --error-red: #ef4444;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    --gradient-secondary: linear-gradient(135deg, var(--primary-teal), var(--primary-blue));
    --gradient-accent: linear-gradient(135deg, var(--accent-orange), var(--accent-pink));
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: var(--transition-normal);
}

.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 span {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    position: relative;
    transition: var(--transition-normal);
}

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

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

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

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 0 var(--spacing-3xl);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-2xl);
}

.hero-text {
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

/* CV Download Button Styles */
.hero-cv {
    margin-top: var(--spacing-lg);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
}

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

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.profile-card {
    width: 350px;
    height: 350px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.profile-image {
    width: 100%;
    height: 100%;
}

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

/* About Section */
.about {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: var(--font-size-3xl);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.about-content {
    display: flex;
    gap: var(--spacing-2xl);
    align-items: center;
}

.about-text {
    flex: 2;
}

.about-text p {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
    line-height: 1.7;
}

.about-stats {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-normal);
}

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

.stat-card h3 {
    font-size: var(--font-size-3xl);
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.stat-card p {
    color: var(--gray-600);
}

/* Skills Section */
.skills {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.skill-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

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

.skill-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

.skill-icon.python {
    background: rgba(53, 114, 165, 0.1);
    color: #3572A5;
}

.skill-icon.cpp {
    background: rgba(0, 90, 156, 0.1);
    color: #005A9C;
}

.skill-icon.html {
    background: rgba(227, 79, 38, 0.1);
    color: #E34F26;
}

.skill-icon.css {
    background: rgba(21, 114, 182, 0.1);
    color: #1572B6;
}

.skill-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.skill-card p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

.skill-bar {
    height: 8px;
    background: var(--gray-200);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    border-radius: var(--radius-md);
    background: var(--gradient-primary);
    transition: width 1s ease-in-out;
}

.skill-progress[data-level="90"] {
    width: 90%;
}

.skill-progress[data-level="75"] {
    width: 75%;
}

.skill-progress[data-level="85"] {
    width: 85%;
}

.skill-progress[data-level="80"] {
    width: 80%;
}

/* Education Section */
.education {
    padding: var(--spacing-3xl) 0;
}

.education-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl) 0;
}

.timeline-item {
    position: relative;
    padding-left: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

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

.timeline-content {
    position: relative;
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: -15px;
    top: 20px;
    width: 15px;
    height: 2px;
    background: var(--primary-blue);
}

.timeline-info h3 {
    font-size: var(--font-size-xl);
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.timeline-info h4 {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-xs);
}

.timeline-date {
    display: inline-block;
    background: var(--gray-100);
    color: var(--primary-blue);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.timeline-info p {
    color: var(--gray-600);
}

/* Projects Section */
.projects {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
}

.section-subtitle {
    text-align: center;
    color: var(--gray-600);
    margin-bottom: var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

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

.project-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

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

.project-image {
    height: 200px;
    overflow: hidden;
}

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

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

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

.project-content h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--gray-800);
}

.project-content p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-md);
}

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

.tag {
    background: var(--gray-100);
    color: var(--primary-blue);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

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

.project-link {
    color: var(--primary-blue);
    font-weight: 600;
    text-decoration: none;
    position: relative;
}

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

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

/* Contact Section */
.contact {
    padding: 5rem 0;
    background-color: var(--gray-50);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.contact-social h3,
.contact-form-container h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--gray-800);
    position: relative;
    padding-bottom: 0.5rem;
}

.contact-social h3::after,
.contact-form-container h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--gradient-primary);
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.social-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    text-decoration: none;
    color: var(--gray-700);
}

.social-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

.social-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.social-icon svg {
    width: 24px;
    height: 24px;
}

.social-icon.linkedin {
    background-color: rgba(10, 102, 194, 0.1);
    color: #0A66C2;
}

.social-icon.github {
    background-color: rgba(36, 41, 46, 0.1);
    color: #24292E;
}

.social-icon.twitter {
    background-color: rgba(29, 161, 242, 0.1);
    color: #1DA1F2;
}

.social-icon.email {
    background-color: rgba(234, 67, 53, 0.1);
    color: #EA4335;
}

.social-card small {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 0.25rem;
}

/* Contact Form */
.contact-form-container {
    background: white;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: 0.375rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.btn.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn.btn-primary svg {
    width: 1rem;
    height: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .social-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}
/* Footer Styles */
.footer {
    background-color: var(--gray-900);
    color: var(--gray-400);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
}

.footer-column h4 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.footer-column ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-column a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: var(--primary-blue);
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: var(--spacing-lg);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.footer-credit {
    color: var(--gray-500);
    font-size: var(--font-size-sm);
}

/* Responsive */
@media (max-width: 600px) {
    .footer-links {
        grid-template-columns: 1fr;
    }
}
/* Responsive Design */
@media (max-width: 992px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }

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

    .about-content {
        flex-direction: column;
    }

    .contact-content {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .hero-description {
        font-size: var(--font-size-md);
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

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

@media (max-width: 576px) {
    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .profile-card {
        width: 280px;
        height: 280px;
    }
}