/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    --color-primary: #001D57;
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-dark: #1a1a1a;
    --color-gray-medium: #2a2a2a;
    --color-gray-light: #3a3a3a;
    --color-gray-border: #404040;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0b0b0;
    --color-accent: #002870;
    
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Monaco', 'Courier New', monospace;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-black);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

/* ===================================
   Container & Layout
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Navigation
   =================================== */
.nav {
    background-color: var(--color-black);
    border-bottom: 1px solid var(--color-gray-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-white);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    padding: 0.5rem 0;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-white);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-primary);
}

.nav-link-cta {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 0.5rem 1.5rem;
    border-radius: var(--border-radius);
}

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

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

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: var(--transition);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    padding: var(--spacing-xl) 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 800px;
}

.hero-label {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    letter-spacing: -1px;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

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

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

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

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

/* ===================================
   Skills Overview
   =================================== */
.skills-overview {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-gray-dark);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    font-weight: 700;
}

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

.skill-card {
    background-color: var(--color-gray-medium);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-border);
    transition: var(--transition);
}

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

.skill-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.skill-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.skill-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ===================================
   Featured Projects
   =================================== */
.featured-projects {
    padding: var(--spacing-xl) 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.view-all-link {
    color: var(--color-primary);
    font-weight: 500;
    transition: var(--transition);
}

.view-all-link:hover {
    color: var(--color-accent);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background-color: var(--color-gray-dark);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-border);
    overflow: hidden;
    transition: var(--transition);
}

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

.project-image {
    width: 100%;
    height: 200px;
    background-color: var(--color-gray-medium);
    position: relative;
}

.project-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

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

.project-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.project-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

/* Project Images Gallery */
.project-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.project-image-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--color-gray-border);
    background-color: var(--color-gray-medium);
}

.project-image-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.project-image-item:hover img {
    transform: scale(1.02);
}

.tag {
    background-color: var(--color-gray-medium);
    color: var(--color-text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid var(--color-gray-border);
}

/* ===================================
   CTA Section
   =================================== */
.cta-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-gray-dark);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.cta-content p {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-gray-border);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-content p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

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

.footer-links a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

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

/* ===================================
   Page Header
   =================================== */
.page-header {
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-bottom: 1px solid var(--color-gray-border);
}

.page-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
}

/* ===================================
   About Page
   =================================== */
.about-content {
    padding: var(--spacing-xl) 0;
}

.about-intro {
    max-width: 900px;
    margin: 0 auto var(--spacing-lg);
}

.lead-text {
    font-size: 1.35rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    text-align: center;
}

.skills-section {
    margin: var(--spacing-xl) 0;
}

.competencies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.competency-group {
    background-color: var(--color-gray-dark);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-border);
}

.competency-group h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.competency-list {
    list-style: none;
}

.competency-list li {
    padding: 0.5rem 0;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-gray-border);
}

.competency-list li:last-child {
    border-bottom: none;
}

.tools-section {
    margin: var(--spacing-xl) 0;
}

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

.tool-category {
    background-color: var(--color-gray-dark);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-border);
}

.tool-category h3 {
    font-size: 1.15rem;
    margin-bottom: var(--spacing-sm);
}

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

.tool-tag {
    background-color: var(--color-gray-medium);
    color: var(--color-text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    border: 1px solid var(--color-gray-border);
}

.approach-section {
    margin: var(--spacing-xl) 0;
}

.approach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.approach-item {
    background-color: var(--color-gray-dark);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-border);
}

.approach-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.approach-item h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.approach-item p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.about-cta {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--color-gray-dark);
    border-radius: var(--border-radius);
}

.about-cta h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.about-cta p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

/* ===================================
   Projects Page
   =================================== */
.projects-section {
    padding: var(--spacing-xl) 0;
}

/* Clickable Project Cards Grid */
.projects-grid-page {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.project-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
}

.project-card-detailed {
    background-color: var(--color-gray-dark);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-border);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.project-card-image {
    width: 100%;
    height: 200px;
    background-color: var(--color-gray-medium);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-logo-small {
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-card-content {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-card-content h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.project-card-excerpt {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
    flex: 1;
}

.project-metrics {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--color-gray-medium);
    border-radius: var(--border-radius);
}

.metric-item {
    display: flex;
    flex-direction: column;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.metric-label {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.project-card-cta {
    color: var(--color-primary);
    font-weight: 500;
    margin-top: var(--spacing-sm);
    display: inline-block;
}


.project-detail {
    background-color: var(--color-gray-dark);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-border);
    margin-bottom: var(--spacing-lg);
}

.project-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.project-detail-title-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.project-detail-title-group h2 {
    font-size: 2rem;
}

.project-status {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.project-status.beta {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.project-link {
    color: var(--color-primary);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

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

.project-detail-intro {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.project-detail-content {
    margin-top: var(--spacing-md);
}

.project-detail-section {
    margin-bottom: var(--spacing-md);
}

.project-detail-section h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.project-detail-section p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.detail-list {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.detail-list li {
    color: var(--color-text-secondary);
    padding: 0.5rem 0;
    padding-left: var(--spacing-md);
    position: relative;
    line-height: 1.6;
}

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

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.result-card {
    background-color: var(--color-gray-medium);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-border);
    text-align: center;
}

.result-metric {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.result-label {
    font-size: 0.9rem;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.result-period {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

/* ===================================
   Contact Page
   =================================== */
.contact-content {
    padding: var(--spacing-xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.contact-info h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.contact-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.contact-details {
    margin: var(--spacing-md) 0;
}

.contact-details h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.help-list {
    list-style: none;
}

.help-list li {
    background-color: var(--color-gray-dark);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-border);
    margin-bottom: var(--spacing-sm);
}

.help-list li strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--color-white);
}

.help-list li span {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.contact-links {
    margin-top: var(--spacing-md);
}

.contact-links h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--color-gray-dark);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-border);
    transition: var(--transition);
}

.social-link:hover {
    border-color: var(--color-primary);
    background-color: var(--color-gray-medium);
}

.contact-form-container {
    background-color: var(--color-gray-dark);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-border);
}

.form-wrapper {
    min-height: 500px;
}

#jotform-embed {
    width: 100%;
}

.form-placeholder {
    text-align: center;
    color: var(--color-text-secondary);
    padding: var(--spacing-lg);
    background-color: var(--color-gray-medium);
    border-radius: var(--border-radius);
    border: 2px dashed var(--color-gray-border);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 73px;
        left: 0;
        right: 0;
        background-color: var(--color-black);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-gray-border);
        display: none;
        gap: var(--spacing-sm);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-link {
        padding: var(--spacing-sm) 0;
        border-bottom: 1px solid var(--color-gray-border);
    }
    
    .nav-link:last-child {
        border-bottom: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .page-title {
        font-size: 2.25rem;
    }
    
    .competencies-grid {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .approach-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
}