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

:root {
    --primary-color: #000000;
    --secondary-color: #333333;
    --text-color: #1a1a1a;
    --text-light: #666666;
    --bg-color: #ffffff;
    --bg-light: #f8f9fa;
    --border-color: #e0e0e0;
    --accent-color: #0066cc;
    --accent-hover: #0052a3;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
    margin: 0;
    padding: 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--primary-color);
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--primary-color);
    transition: all 0.3s ease;
}

@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 1);
        backdrop-filter: blur(30px);
        -webkit-backdrop-filter: blur(30px);
        flex-direction: column;
        padding: 2rem;
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s ease;
        gap: 1rem;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
        z-index: 999;
        width: 100%;
        margin: 0;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .mobile-menu-toggle {
        display: flex !important;
        z-index: 1001;
        position: relative;
        background: none;
        border: none;
    }
    
    .nav-menu li {
        opacity: 0;
        transform: translateY(-10px);
        transition: all 0.3s ease;
        list-style: none;
    }
    
    .nav-menu li a {
        display: block;
        padding: 0.75rem 0;
        color: var(--text-color);
        font-weight: 500;
        text-decoration: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu li:last-child a {
        border-bottom: none;
    }
    
    .nav-menu.active li:nth-child(1) {
        opacity: 1;
        transform: translateY(0);
        transition-delay: 0.1s;
    }
    
    .nav-menu.active li:nth-child(2) {
        opacity: 1;
        transform: translateY(0);
        transition-delay: 0.2s;
    }
    
    .nav-menu.active li:nth-child(3) {
        opacity: 1;
        transform: translateY(0);
        transition-delay: 0.3s;
    }
    
    .nav-menu.active li:nth-child(4) {
        opacity: 1;
        transform: translateY(0);
        transition-delay: 0.4s;
    }
    
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Home Section */
.home-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 0 60px;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
}

.home-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 2rem;
}

.profile-image-wrapper {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-hover);
    background: var(--bg-light);
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 20%;
}

.home-text {
    max-width: 600px;
}

.name-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.intro-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.social-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: all 0.3s ease;
    width: 48px;
    height: 48px;
}

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

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

/* Section Titles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

/* Notable Projects Section */
.notable-projects {
    padding: 6rem 0;
    background: var(--bg-color);
}

.projects-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

.project-card {
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s ease;
}

.project-card:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
    transform: translateY(-4px);
}

.project-card.featured {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-color: var(--accent-color);
}

.project-header {
    margin-bottom: 1.5rem;
    position: relative;
}

.project-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.featured-badge {
    position: absolute;
    top: -10px;
    right: 0;
    background: var(--accent-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.tag {
    background: var(--bg-light);
    color: var(--text-color);
    padding: 0.375rem 0.75rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.project-body {
    line-height: 1.8;
    color: var(--text-light);
}

.project-body p {
    margin-bottom: 1rem;
}

.project-body p:last-child {
    margin-bottom: 0;
}

.tech-note {
    font-style: italic;
    font-size: 0.95rem;
    color: var(--text-color);
    background: rgba(0, 102, 204, 0.05);
    padding: 1rem;
    border-radius: 8px;
    border-left: 3px solid var(--accent-color);
}

.project-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--accent-color);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.project-link:hover {
    color: var(--accent-hover);
    transform: translateX(4px);
}

/* All Projects Section */
.projects-section {
    padding: 6rem 0;
    background: var(--bg-light);
}

.project-card-sm {
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s ease;
}

.project-card-sm:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
    transform: translateY(-4px);
}

.project-card-sm h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.project-card-sm p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.project-card-sm a {
    color: var(--accent-color);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.project-card-sm a:hover {
    color: var(--accent-hover);
    transform: translateX(4px);
}

/* Blog Section */
.blog-section {
    padding: 6rem 0;
    background: var(--bg-color);
}

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

.blog-intro {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.medium-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.medium-link:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.medium-link svg {
    width: 24px;
    height: 24px;
}

/* Contact Section */
.contact-section {
    padding: 6rem 0;
    background: var(--bg-light);
}

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

.contact-intro {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.3s ease;
    min-width: 150px;
}

.contact-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.contact-card svg {
    fill: var(--primary-color);
}

.contact-card span {
    font-weight: 600;
}

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

/* Responsive Design */
@media (max-width: 968px) {
    .home-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
        justify-items: center;
    }

    .profile-image-wrapper {
        max-width: 300px;
        margin: 0 auto;
    }

    .name-title {
        font-size: 2.5rem;
    }

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

    .social-links {
        justify-content: center;
    }

    .home-text {
        max-width: 100%;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 1.5rem;
    }

    .nav-container {
        padding: 1rem 1.5rem;
    }

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

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

    .intro-text {
        font-size: 1rem;
    }

    .social-links {
        justify-content: center;
    }

    .contact-links {
        flex-direction: column;
        align-items: stretch;
    }

    .contact-card {
        width: 100%;
    }
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}

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

.project-card,
.contact-card {
    animation: fadeIn 0.6s ease-out;
}

/* Selection color */
::selection {
    background: var(--accent-color);
    color: white;
}