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

:root {
    /* Primary Colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1a2342;
    --bg-tertiary: #232e4a;
    /* Text Colors */
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    /* Accent Colors */
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --accent-secondary: #0ea5e9;
    /* Borders */
    --border-color: #334155;
    --border-light: #475569;
    /* Transitions */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.6;
}

h1 {
    font-size: 3.5rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.5rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
}

p {
    color: var(--text-secondary);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

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

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-decoration: none;
    transition: var(--transition);
}

    .nav-logo a:hover {
        color: var(--accent-secondary);
    }

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
    font-size: 0.95rem;
}

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

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

    .hamburger span {
        width: 25px;
        height: 3px;
        background: var(--text-primary);
        margin: 4px 0;
        transition: var(--transition);
        border-radius: 2px;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(10px, 10px);
    }

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }

/* Hero Section */
.hero {
    margin-top: 60px;
    padding: 6rem 2rem;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

    .hero::before {
        content: '';
        position: absolute;
        width: 500px;
        height: 500px;
        background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
        opacity: 0.05;
        top: -200px;
        right: -200px;
        border-radius: 50%;
        z-index: 0;
    }

.hero-content {
    max-width: 700px;
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero h1 {
    background: linear-gradient(135deg, var(--text-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    animation: fadeInDown 0.8s ease;
}

.tagline {
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.3s both;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    border: 2px solid transparent;
    transition: var(--transition);
    cursor: pointer;
    display: inline-block;
    white-space: nowrap;
}

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

    .btn-primary:hover {
        background: var(--accent-hover);
        transform: translateY(-2px);
        box-shadow: 0 10px 20px rgba(59, 130, 246, 0.2);
    }

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

    .btn-secondary:hover {
        background: var(--accent-primary);
        color: white;
        transform: translateY(-2px);
    }

/* Sections */
.section {
    padding: 6rem 2rem;
}

.section-alt {
    background: var(--bg-secondary);
}

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

.section-title {
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

    .section-title::after {
        content: '';
        position: absolute;
        bottom: -10px;
        left: 0;
        width: 80px;
        height: 4px;
        background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
        border-radius: 2px;
    }

/* About Section */
.about-content {
    display: grid;
    gap: 1.5rem;
}

    .about-content p {
        font-size: 1.1rem;
        line-height: 1.8;
        color: var(--text-secondary);
    }

        .about-content p strong {
            color: var(--text-primary);
            font-weight: 600;
        }

/* Experience Section */
.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.experience-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

    .experience-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 4px;
        height: 100%;
        background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
    }

    .experience-card:hover {
        border-color: var(--accent-primary);
        transform: translateY(-4px);
        box-shadow: 0 10px 30px rgba(59, 130, 246, 0.1);
    }

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

    .experience-header h3 {
        margin: 0;
        flex: 1;
    }

.experience-company {
    background: var(--bg-tertiary);
    color: var(--accent-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
}

.experience-period {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.experience-list {
    list-style: none;
    padding: 0;
}

    .experience-list li {
        padding-left: 1.5rem;
        margin-bottom: 0.75rem;
        color: var(--text-secondary);
        font-size: 0.95rem;
        line-height: 1.6;
        position: relative;
    }

        .experience-list li::before {
            content: '→';
            position: absolute;
            left: 0;
            color: var(--accent-primary);
            font-weight: bold;
        }

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    transition: var(--transition);
}

    .project-card:hover {
        border-color: var(--accent-primary);
        box-shadow: 0 20px 40px rgba(59, 130, 246, 0.1);
        transform: translateY(-8px);
    }

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    gap: 1rem;
    margin-bottom: 1rem;
}

    .project-header h3 {
        margin: 0;
        flex: 1;
        line-height: 1.3;
    }

.project-link {
    color: var(--accent-primary);
    font-size: 1.5rem;
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 0.375rem;
    background: var(--bg-tertiary);
}

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

.project-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

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

.tag {
    background: var(--bg-tertiary);
    color: var(--accent-secondary);
    padding: 0.375rem 0.875rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

    .tag:hover {
        background: var(--accent-primary);
        color: white;
        border-color: var(--accent-primary);
    }

/* Skills Section */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.skill-category h4 {
    color: var(--accent-primary);
    margin-bottom: 1.25rem;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-badge {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    border: 1px solid var(--border-color);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
    display: inline-block;
}

    .skill-badge:hover {
        background: var(--accent-primary);
        color: white;
        border-color: var(--accent-primary);
        transform: translateY(-2px);
    }

/* Contact Section */
.contact-subtitle {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 3rem;
    text-align: center;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-link {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: var(--transition);
    color: inherit;
}

    .contact-link:hover {
        border-color: var(--accent-primary);
        box-shadow: 0 10px 30px rgba(59, 130, 246, 0.1);
        transform: translateY(-4px);
    }

.contact-icon {
    font-size: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--bg-tertiary);
    border-radius: 0.5rem;
    flex-shrink: 0;
}

.contact-label {
    color: var(--text-tertiary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-value {
    color: var(--text-primary);
    font-weight: 600;
    margin-top: 0.25rem;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 2rem;
    text-align: center;
}

    .footer p {
        color: var(--text-tertiary);
        margin: 0.5rem 0;
    }

.footer-links a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: var(--transition);
}

    .footer-links a:hover {
        color: var(--accent-secondary);
    }

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: absolute;
        top: 60px;
        left: -100%;
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        gap: 0;
    }

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

        .nav-menu li {
            padding: 1rem 0;
            border-bottom: 1px solid var(--border-color);
        }

    .hamburger {
        display: flex;
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 1.875rem;
    }

    .hero {
        margin-top: 60px;
        padding: 4rem 1.5rem;
        min-height: auto;
    }

    .section {
        padding: 4rem 1.5rem;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
    }

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

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

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

    .contact-methods {
        grid-template-columns: 1fr;
    }

    .contact-link {
        flex-direction: column;
        text-align: center;
    }

    .section-title::after {
        left: 50%;
        transform: translateX(-50%);
    }

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

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .hero {
        padding: 3rem 1rem;
    }

    .section {
        padding: 3rem 1rem;
    }

    .tagline {
        font-size: 1.25rem;
    }

    .subtitle {
        font-size: 1rem;
    }

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

    .container {
        padding: 0;
    }
}

/* Scroll to top button */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    z-index: 999;
}

    .scroll-to-top.visible {
        opacity: 1;
        visibility: visible;
    }

    .scroll-to-top:hover {
        background: var(--accent-hover);
        transform: translateY(-4px);
    }

/* Projects Page Styles */
.projects-hero {
    margin-top: 60px;
    padding: 4rem 2rem;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.projects-grid.detailed {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.project-card-large {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 3rem;
    transition: var(--transition);
}

    .project-card-large:hover {
        border-color: var(--accent-primary);
        box-shadow: 0 20px 50px rgba(59, 130, 246, 0.08);
    }

.project-card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    gap: 2rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 2rem;
}

    .project-card-header h2 {
        font-size: 2rem;
        margin: 0;
        color: var(--text-primary);
    }

.project-subtitle {
    color: var(--accent-secondary);
    font-size: 1.1rem;
    margin-top: 0.5rem;
    font-weight: 500;
}

.project-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
    background: var(--bg-tertiary);
    padding: 2rem;
    border-radius: 0.5rem;
    border-left: 4px solid var(--accent-primary);
}

.overview-item h4 {
    color: var(--accent-primary);
    margin-bottom: 0.75rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.overview-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

.project-section {
    margin-bottom: 3rem;
}

    .project-section h3 {
        color: var(--text-primary);
        margin-bottom: 1.25rem;
        font-size: 1.5rem;
        border-bottom: 2px solid var(--accent-primary);
        padding-bottom: 0.75rem;
        display: inline-block;
    }

    .project-section > p {
        margin-bottom: 1.5rem;
        color: var(--text-secondary);
        line-height: 1.8;
    }

.architecture-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

    .architecture-list li {
        padding: 0.75rem 0;
        padding-left: 1.5rem;
        color: var(--text-secondary);
        position: relative;
        line-height: 1.7;
    }

        .architecture-list li::before {
            content: '▸';
            position: absolute;
            left: 0;
            color: var(--accent-primary);
            font-weight: bold;
        }

        .architecture-list li strong {
            color: var(--text-primary);
        }

.architecture-diagram {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 2rem;
    overflow-x: auto;
    margin: 2rem 0;
}

    .architecture-diagram pre {
        margin: 0;
        color: var(--accent-primary);
        font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
        font-size: 0.9rem;
    }

    .architecture-diagram code {
        color: var(--accent-primary);
    }

.responsibility-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.responsibility-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    border-left: 4px solid var(--accent-secondary);
    transition: var(--transition);
}

    .responsibility-card:hover {
        border-left-color: var(--accent-primary);
        transform: translateX(4px);
    }

    .responsibility-card h4 {
        color: var(--accent-primary);
        margin-bottom: 0.75rem;
        font-size: 1rem;
    }

    .responsibility-card p {
        color: var(--text-secondary);
        font-size: 0.95rem;
        line-height: 1.6;
        margin: 0;
    }

.process-list {
    list-style: decimal;
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

    .process-list li {
        margin-bottom: 0.75rem;
        line-height: 1.7;
        color: var(--text-secondary);
    }

    .process-list strong {
        color: var(--text-primary);
    }

    .process-list code {
        background: var(--bg-tertiary);
        color: var(--accent-secondary);
        padding: 0.25rem 0.5rem;
        border-radius: 0.25rem;
        font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
        font-size: 0.9rem;
    }

.tech-stack {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin: 1.5rem 0;
}

.tech-category h4 {
    color: var(--accent-primary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.tech-category li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

    .tech-category li::before {
        content: '→ ';
        color: var(--accent-secondary);
        margin-right: 0.5rem;
    }

.decisions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.decision-card {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(14, 165, 233, 0.05));
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    transition: var(--transition);
}

    .decision-card:hover {
        border-color: var(--accent-primary);
        background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(14, 165, 233, 0.1));
    }

    .decision-card h4 {
        color: var(--accent-primary);
        margin-bottom: 0.75rem;
        font-size: 1rem;
    }

    .decision-card p {
        color: var(--text-secondary);
        font-size: 0.95rem;
        line-height: 1.6;
        margin: 0;
    }

.bottlenecks {
    display: grid;
    gap: 1.5rem;
    margin: 2rem 0;
}

.bottleneck-item {
    background: var(--bg-primary);
    border-left: 4px solid var(--accent-hover);
    border-radius: 0.5rem;
    padding: 1.5rem;
}

    .bottleneck-item h4 {
        color: var(--accent-hover);
        margin-bottom: 0.75rem;
    }

    .bottleneck-item p {
        color: var(--text-secondary);
        margin: 0.5rem 0;
        font-size: 0.95rem;
        line-height: 1.6;
    }

        .bottleneck-item p:first-of-type {
            margin-top: 0;
        }

.takeaways-list {
    list-style: none;
    padding: 0;
}

    .takeaways-list li {
        padding: 0.75rem 0;
        padding-left: 1.5rem;
        color: var(--text-secondary);
        position: relative;
        line-height: 1.7;
    }

        .takeaways-list li::before {
            content: '★';
            position: absolute;
            left: 0;
            color: var(--accent-primary);
        }

/* Responsive adjustments for project pages */
@media (max-width: 768px) {
    .projects-hero {
        padding: 3rem 1.5rem;
        min-height: auto;
    }

    .project-card-large {
        padding: 2rem 1.5rem;
    }

    .project-card-header {
        flex-direction: column;
        gap: 1rem;
    }

        .project-card-header h2 {
            font-size: 1.5rem;
        }

    .project-overview {
        grid-template-columns: 1fr;
    }

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

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

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

    .architecture-diagram {
        padding: 1rem;
        font-size: 0.8rem;
    }

        .architecture-diagram pre {
            font-size: 0.8rem;
        }

    .project-section h3 {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .project-card-large {
        padding: 1.5rem 1rem;
    }

    .project-card-header h2 {
        font-size: 1.25rem;
    }

    .project-subtitle {
        font-size: 0.95rem;
    }

    .tech-stack {
        grid-template-columns: 1fr;
    }

    .architecture-diagram {
        padding: 1rem;
        font-size: 0.7rem;
    }

    .architecture-diagram pre {
        font-size: 0.7rem;
        line-height: 1.3;
        margin-block-start: 0.5rem;
        white-space: collapse;
    }

    .project-section h3 {
        font-size: 1.125rem;
    }
}