:root {
    /* Colors */
    --primary-color: #0A192F;
    --secondary-color: #007BFF;
    --light-blue: #E6F1FF;
    --white: #FFFFFF;
    --black: #020C1B;
    --gray: #8892B0;
    --light-gray: #CCD6F6;
    
    /* Fonts */
    --font-main: 'Inter', sans-serif;
    --font-heading: 'Montserrat', sans-serif;
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;
    
    /* Transitions */
    --transition-slow: 0.6s cubic-bezier(0.65, 0, 0.35, 1);
    --transition-fast: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: var(--section-padding);
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 800;
}

span {
    color: var(--secondary-color);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    border: none;
}

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

.btn-primary:hover {
    background-color: #0056b3;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 123, 255, 0.2);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
}

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

.btn-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    color: var(--black);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition-fast);
}

.navbar.scrolled {
    height: 70px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

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

.nav-link {
    font-weight: 500;
    font-size: 0.9rem;
    position: relative;
}

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

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

/* Hero Section */
.hero-section {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.hero-bg .circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 0;
}

.circle-1 {
    width: 400px;
    height: 400px;
    background: rgba(0, 123, 255, 0.1);
    top: -100px;
    right: -100px;
}

.circle-2 {
    width: 300px;
    height: 300px;
    background: rgba(100, 255, 218, 0.1);
    bottom: -50px;
    left: -50px;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-content h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 1.1;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 600px;
    margin-bottom: 40px;
}

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

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--gray);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.mouse {
    width: 25px;
    height: 45px;
    border: 2px solid var(--gray);
    border-radius: 20px;
    position: relative;
}

.mouse::after {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--gray);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { transform: translate(-50%, 0); opacity: 1; }
    100% { transform: translate(-50%, 15px); opacity: 0; }
}

/* Section Header */
.section-header {
    margin-bottom: 60px;
}

.section-subtitle {
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--secondary-color);
    font-size: 0.9rem;
    font-weight: 600;
    display: block;
    margin-bottom: 10px;
}

.section-header h2 {
    font-size: 2.5rem;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.about-specialties {
    display: flex;
    gap: 30px;
    margin-top: 40px;
}

.specialty-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.specialty-item i {
    color: var(--secondary-color);
}

.specialty-item span {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--black);
}

.placeholder-img {
    width: 100%;
    height: 400px;
    background: var(--light-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    font-weight: 800;
    color: var(--secondary-color);
    border-radius: 10px;
    position: relative;
}

.placeholder-img::after {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: -20px;
    bottom: -20px;
    border: 2px solid var(--secondary-color);
    z-index: -1;
    border-radius: 10px;
    transition: var(--transition-slow);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.skill-card {
    padding: 40px;
    background: #f8f9fa;
    border-radius: 10px;
    transition: var(--transition-fast);
    border: 1px solid transparent;
}

.skill-card:hover {
    transform: translateY(-10px);
    background: var(--white);
    border-color: var(--light-blue);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
}

.skill-card i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.skill-card h3 {
    margin-bottom: 10px;
}

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

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.project-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: var(--transition-fast);
}

.project-card:hover {
    transform: translateY(-10px);
}

.project-img {
    position: relative;
    height: 250px;
}

.placeholder-project {
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 600;
}

/* Projects Section Enhancement */
.project-card {
    cursor: pointer;
    border: 1px solid rgba(0,0,0,0.05);
}

.project-img {
    position: relative;
    height: 350px;
    overflow: hidden;
}

.placeholder-project {
    transition: transform 0.8s cubic-bezier(0.2, 1, 0.3, 1);
}

.project-card:hover .placeholder-project {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(10, 25, 47, 0.9), transparent);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s cubic-bezier(0.2, 1, 0.3, 1);
}

.project-card:hover .project-overlay {
    opacity: 1;
    transform: translateY(0);
}

.project-preview-info h3 {
    color: var(--white);
    margin-bottom: 5px;
    font-size: 1.5rem;
}

.project-preview-info span {
    color: var(--secondary-color);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Modal Immersive Styles */
.project-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--white);
    z-index: 2000;
    display: none;
    overflow-y: auto;
    padding: 100px 0;
}

.modal-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.close-modal {
    position: fixed;
    top: 40px;
    right: 40px;
    background: var(--black);
    color: var(--white);
    border: none;
    padding: 12px 25px;
    border-radius: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 2001;
    font-weight: 600;
    transition: var(--transition-fast);
}

.close-modal:hover {
    transform: scale(1.05);
    background: var(--secondary-color);
}

.modal-header {
    margin-bottom: 50px;
}

.modal-header h2 {
    font-size: clamp(2rem, 5vw, 4rem);
    margin-bottom: 20px;
}

.modal-body {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
}

.modal-image .placeholder-project.tall {
    height: 600px;
    border-radius: 15px;
}

.modal-info h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.modal-info p {
    color: var(--gray);
    font-size: 1.1rem;
    margin-bottom: 30px;
    line-height: 1.8;
}

.modal-meta {
    margin-bottom: 40px;
    display: grid;
    gap: 15px;
}

.modal-meta div {
    font-size: 1rem;
}

.modal-meta strong {
    color: var(--black);
    margin-right: 10px;
}

@media (max-width: 992px) {
    .modal-body {
        grid-template-columns: 1fr;
    }
    .modal-image .placeholder-project.tall {
        height: 400px;
    }
    .close-modal {
        top: 20px;
        right: 20px;
        padding: 10px 20px;
    }
}

.project-info {
    padding: 30px;
}

.project-info h3 {
    margin-bottom: 10px;
}

.project-info p {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

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

.project-tags span {
    font-size: 0.75rem;
    background: var(--light-blue);
    color: var(--secondary-color);
    padding: 5px 12px;
    border-radius: 20px;
    font-weight: 600;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 20px;
}

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

.contact-list li {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    font-weight: 500;
}

.contact-list i {
    color: var(--secondary-color);
}

.contact-form {
    display: grid;
    gap: 20px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #e1e1e1;
    border-radius: 5px;
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 10px rgba(0, 123, 255, 0.1);
}

/* Footer */
.footer {
    padding: 60px 0;
    background: var(--black);
    color: var(--white);
    text-align: center;
}

.footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

.social-links {
    display: flex;
    gap: 20px;
}

.social-links a {
    width: 45px;
    height: 45px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-5px);
}

/* Responsive */
@media (max-width: 992px) {
    .about-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image {
        order: -1;
    }
}

/* Navbar Mobile Styles */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--black);
    transition: var(--transition-fast);
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 40px;
        transition: var(--transition-slow);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.05);
        z-index: 1000;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-link {
        font-size: 1.5rem;
    }
    
    .menu-toggle.open span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }
    
    .menu-toggle.open span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.open span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }
}