:root {
    --dark-navy: #0a192f;
    --navy: #112240;
    --light-navy: #233554;
    --slate: #8892b0;
    --light-slate: #a8b2d1;
    --lightest-slate: #ccd6f6;
    --white: #e6f1ff;
    --green: #64ffda;
    --blue: #57cbff;
    
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --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 {
    background-color: var(--dark-navy);
    color: var(--slate);
    font-family: var(--font-body);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--lightest-slate);
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.1;
}

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Utilities */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: clamp(26px, 5vw, 32px);
    margin-bottom: 40px;
    position: relative;
    padding-left: 15px;
    border-left: 4px solid var(--blue);
}

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

.animate-up {
    opacity: 0;
    animation: fadeInUp 0.8s forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 25, 47, 0.85);
    backdrop-filter: blur(10px);
    height: 80px;
    display: flex;
    align-items: center;
    box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 24px;
    color: var(--blue);
    font-weight: 700;
}

.logo .accent {
    color: var(--white);
}

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

.nav-link {
    font-size: 14px;
    color: var(--lightest-slate);
    font-weight: 500;
}

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

.btn-outline {
    border: 1px solid var(--blue);
    color: var(--blue);
    padding: 8px 16px;
    border-radius: 4px;
}

.btn-outline:hover {
    background: rgba(87, 203, 255, 0.1);
}

/* Mobile Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--blue);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0.2;
    z-index: -1;
}

.hero-content {
    z-index: 1;
    max-width: 1000px;
}

.hero h2 {
    font-family: var(--font-body);
    font-weight: 400;
    color: var(--blue);
    font-size: clamp(14px, 5vw, 18px);
    margin-bottom: 20px;
}

.hero h1 {
    font-size: clamp(40px, 8vw, 80px);
    color: var(--white);
    line-height: 1.1;
    margin-bottom: 10px;
}

.tagline {
    font-size: clamp(16px, 4vw, 20px);
    max-width: 600px;
    margin-bottom: 50px;
    color: var(--slate);
}

.cta-group {
    display: flex;
    gap: 20px;
}

.btn {
    padding: 15px 28px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background-color: transparent;
    border: 1px solid var(--blue);
    color: var(--blue);
}

.btn-primary:hover {
    background-color: rgba(87, 203, 255, 0.1);
    transform: translateY(-3px);
}

.btn-secondary {
    background-color: var(--blue);
    color: var(--dark-navy);
    border: 1px solid var(--blue);
}

.btn-secondary:hover {
    background-color: #79d6ff;
    transform: translateY(-3px);
}

/* About Section */
.about-section {
    background-color: var(--dark-navy);
}

.about-content {
    display: flex;
    gap: 50px;
    align-items: center;
}

.about-image {
    flex-shrink: 0;
    width: 300px;
    height: 300px;
    border-radius: 4px;
    position: relative;
    background-color: var(--blue);
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 4px;
    position: relative;
    top: 0;
    left: 0;
    filter: none;
    transition: var(--transition);
    border: 2px solid var(--blue);
    animation: float 4s ease-in-out infinite;
}

.about-image:hover img {
    filter: grayscale(100%) brightness(80%);
    animation-play-state: paused;
    box-shadow: 10px 10px 0 0 rgba(87, 203, 255, 0.2);
    transform: translate(-5px, -5px); 
}

.about-text {
    flex: 1;
}

.about-text p {
    margin-bottom: 15px;
    font-size: 18px;
}

/* Skills Section */
.skills-section {
    background-color: var(--navy);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.skill-card {
    background-color: var(--light-navy);
    padding: 30px;
    border-radius: 6px;
    transition: var(--transition);
}

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

.skill-icon {
    font-size: 40px;
    color: var(--blue);
    margin-bottom: 20px;
}

.skill-card h3 {
    margin-bottom: 20px;
    font-size: 20px;
    color: var(--lightest-slate);
}

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

.skill-tags span {
    font-family: var(--font-body);
    font-size: 13px;
    color: var(--blue);
    background: rgba(87, 203, 255, 0.1);
    padding: 5px 10px;
    border-radius: 4px;
}

/* Projects Section */
.projects-section {
    background-color: var(--dark-navy);
}

.projects-grid {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.project-card {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    align-items: center;
}

.project-image {
    grid-column: 1 / 8;
    position: relative;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 20px 30px -15px rgba(2, 12, 27, 0.7);
    cursor: pointer;
}

.project-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
    filter: grayscale(100%) contrast(1) brightness(90%);
}

.project-image:hover img {
    filter: none;
    transform: scale(1.02);
}

.project-content {
    grid-column: 7 / -1;
    text-align: right;
    z-index: 2;
}

.project-content h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--white);
}

.project-description {
    background-color: var(--light-navy);
    padding: 25px;
    border-radius: 4px;
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
    margin-bottom: 20px;
    color: var(--light-slate);
}

.project-description ul {
    list-style: none;
    padding: 0;
}

.project-description ul li {
    position: relative;
    margin-bottom: 10px;
    text-align: left;
}

.project-content .project-description ul li::before {
    content: "▹";
    color: var(--blue);
    position: absolute;
    left: -20px;
}

.project-card:nth-child(even) .project-content {
    text-align: left;
}

.project-impact {
    margin-bottom: 20px;
    color: var(--blue);
    font-weight: 500;
}

.tech-stack {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tech-stack span {
    font-family: var(--font-body);
    font-size: 13px;
    color: var(--light-slate);
}

.project-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: var(--transition);
    background: rgba(10, 25, 47, 0.8);
    padding: 15px 20px;
    border-radius: 4px;
}

.project-image:hover .project-links {
    opacity: 1;
}

.project-links a {
    color: var(--white);
    font-size: 24px;
}

/* Alternate project layout */

/* Alternate project layout */
.project-card:nth-child(even) .project-image {
    grid-column: 6 / -1;
}

.project-card:nth-child(even) .project-content {
    grid-column: 1 / 7;
    text-align: left;
}

.project-card:nth-child(even) .tech-stack {
    justify-content: flex-start;
}

.project-card:nth-child(even) .project-content .project-description ul li {
    padding-left: 0;
}

/* Experience Section */
.experience-section {
    background-color: var(--navy);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 2px;
    height: 100%;
    background-color: var(--light-navy);
}

.timeline-item {
    position: relative;
    padding-left: 40px;
    margin-bottom: 50px;
}

.timeline-dot {
    position: absolute;
    top: 5px;
    left: -4px;
    width: 10px;
    height: 10px;
    background-color: var(--blue);
    border-radius: 50%;
    box-shadow: 0 0 0 5px rgba(87, 203, 255, 0.2);
}

.timeline-date {
    font-family: var(--font-body);
    color: var(--blue);
    margin-bottom: 10px;
    font-size: 14px;
}

.timeline-content h3 {
    font-size: 22px;
    color: var(--lightest-slate);
    margin-bottom: 5px;
}

.timeline-content h4 {
    font-size: 18px;
    color: var(--slate);
    font-weight: 400;
}

.experience-details {
    margin-top: 15px;
    list-style-type: none;
    padding-left: 0;
}

.experience-details li {
    font-size: 15px;
    color: var(--slate);
    margin-bottom: 8px;
    position: relative;
    padding-left: 20px;
}

.experience-details li::before {
    content: "▹";
    color: var(--blue);
    position: absolute;
    left: 0;
}

.experience-details strong {
    color: var(--light-slate);
}

/* Education Section */
.education-section {
    background-color: var(--dark-navy);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.education-card {
    background-color: var(--light-navy);
    padding: 30px;
    border-radius: 6px;
    border-left: 4px solid var(--blue);
}

.education-card h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    color: var(--white);
}

.degree {
    font-size: 18px;
    color: var(--lightest-slate);
    font-weight: 600;
}

.institution {
    color: var(--blue);
}

.cert-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
}

.cert-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--blue);
}

.cert-list a {
    color: var(--slate);
    transition: var(--transition);
}

.cert-list a:hover {
    color: var(--blue);
}

.cert-date {
    font-size: 0.85em;
    color: var(--light-slate);
    margin-left: 5px;
}

.cert-list i {
    font-size: 0.8em;
    margin-left: 5px;
    opacity: 0.7;
}

/* Footer */
footer {
    background-color: var(--navy);
    padding: 50px 0 20px;
    color: var(--slate);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 40px;
}

.footer-left h2 {
    font-size: 32px;
    margin-bottom: 10px;
}

.contact-details {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.contact-details a {
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-details a:hover {
    color: var(--blue);
}

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

.social-links a {
    font-size: 24px;
    color: var(--lightest-slate);
}

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

.footer-bottom {
    text-align: center;
    font-size: 14px;
    border-top: 1px solid var(--light-navy);
    padding-top: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 80px;
        right: 0;
        width: 100%;
        background-color: var(--light-navy);
        padding: 20px;
        box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
    }

    .nav-links.active {
        display: flex;
    }

    .hamburger {
        display: flex;
    }

    .about-content {
        flex-direction: column;
        text-align: center;
    }
    
    .about-image {
        width: 250px;
        height: 250px;
        margin-bottom: 20px;
    }

    .projects-grid {
        gap: 50px;
    }

    .project-card {
        display: flex;
        flex-direction: column;
    }

    .project-image {
        margin-bottom: 20px;
        width: 100%;
        box-shadow: 0 10px 20px -10px rgba(2, 12, 27, 0.7);
    }
    
    .project-content {
        text-align: left;
    }

    .tech-stack {
        justify-content: flex-start;
    }
    
    .project-description ul li::before {
        left: -15px; 
    }
    
    .project-description ul {
        padding-left: 15px;
    }
}

/* Project Page Specific Styles */
.project-page {
    background-color: var(--dark-navy);
}

.project-hero {
    padding: 150px 0 80px;
    background-color: var(--navy);
    border-bottom: 1px solid var(--light-navy);
    text-align: center;
}

.project-hero h1 {
    font-size: clamp(30px, 6vw, 50px);
    margin-bottom: 15px;
    color: var(--white);
}

.project-hero h2 {
    font-size: 22px;
    color: var(--blue);
    font-weight: 400;
    margin-bottom: 25px;
}

.project-hero p {
    max-width: 800px;
    margin: 0 auto 30px;
    font-size: 18px;
    color: var(--slate);
}

.project-details-container {
    padding-top: 60px;
}

.content-block {
    margin-bottom: 60px;
    background-color: var(--navy);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 10px 30px -15px rgba(2,12,27,0.7);
}

.block-title {
    font-size: 26px;
    margin-bottom: 25px;
    color: var(--lightest-slate);
    border-bottom: 1px solid var(--light-navy);
    padding-bottom: 15px;
}

.content-block p {
    margin-bottom: 15px;
    font-size: 17px;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.tech-group h4 {
    color: var(--blue);
    margin-bottom: 15px;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.tech-group ul {
    list-style: none;
    padding-left: 0;
}

.tech-group li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
    font-size: 15px;
}

.tech-group li::before {
    content: "▹";
    color: var(--blue);
    position: absolute;
    left: 0;
}

.tech-group strong {
    color: var(--lightest-slate);
}

.workflow-steps .step {
    margin-bottom: 25px;
    padding-left: 20px;
    border-left: 2px solid var(--light-navy);
}

.workflow-steps .step h4 {
    color: var(--white);
    margin-bottom: 10px;
    font-size: 18px;
}

.code-block {
    background-color: var(--dark-navy);
    padding: 20px;
    border-radius: 6px;
    overflow-x: auto;
    font-family: monospace;
    color: var(--green);
    font-size: 14px;
    line-height: 1.5;
}

.problems-grid {
    display: grid;
    gap: 30px;
}

.problem-card {
    background-color: var(--light-navy);
    padding: 25px;
    border-radius: 6px;
    border-left: 4px solid var(--blue);
}

.problem-card h4 {
    color: var(--white);
    margin-bottom: 15px;
    font-size: 18px;
}

.problem-issue {
    margin-bottom: 15px;
    color: var(--slate);
}

.problem-issue strong {
    color: #ff6b6b;
}

.problem-solution {
    color: var(--light-slate);
}

.problem-solution strong {
    color: var(--green);
}