/* Modern Professional Portfolio - Justin Arndt Technical Writer */

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

:root {
    /* Primary Colors */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #60a5fa;
    
    /* Neutral Colors */
    --dark: #0f172a;
    --dark-secondary: #1e293b;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --gray-lighter: #e2e8f0;
    --white: #ffffff;
    --off-white: #f8fafc;
    
    /* Accent Colors */
    --accent: #8b5cf6;
    --accent-light: #a78bfa;
    --success: #10b981;
    --warning: #f59e0b;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-hero: linear-gradient(135deg, #2563eb 0%, #8b5cf6 100%);
    --gradient-text: linear-gradient(135deg, #2563eb 0%, #8b5cf6 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1), 0 6px 10px rgba(0,0,0,0.08);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.15);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    z-index: 1000;
    transition: var(--transition);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark);
}

.brand-icon {
    font-size: 1.5rem;
}

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

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

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

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

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--dark);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 80px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.gradient-bg {
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: var(--gradient-hero);
    opacity: 0.1;
    transform: rotate(-45deg);
    animation: gradient-shift 20s ease infinite;
}

@keyframes gradient-shift {
    0%, 100% { transform: rotate(-45deg) translateY(0); }
    50% { transform: rotate(-45deg) translateY(-50px); }
}

.animated-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--primary);
    top: 10%;
    left: -200px;
    animation: float 20s ease-in-out infinite;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    bottom: 10%;
    right: -150px;
    animation: float 25s ease-in-out infinite reverse;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--warning);
    top: 50%;
    right: 20%;
    animation: float 15s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(180deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 1px;
    margin-bottom: 2rem;
    animation: fadeInDown 0.6s ease;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease;
}

.highlight {
    color: var(--primary);
    position: relative;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray);
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
    animation: fadeInUp 1.2s ease;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

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

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

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

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

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    animation: fadeInUp 1.4s ease;
}

.stat-item {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    width: 24px;
    height: 36px;
    border: 2px solid var(--primary);
    border-radius: 12px;
    position: relative;
}

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

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

@keyframes scroll {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 20px; }
}

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-tag {
    display: inline-block;
    padding: 0.25rem 1rem;
    background: var(--primary-light);
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--gray);
    font-size: 1.125rem;
}

/* About Section */
.about {
    background: var(--off-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-content h3 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--dark);
}

.about-content p {
    color: var(--gray);
    margin-bottom: 1.5rem;
}

.about-highlights {
    margin-top: 2rem;
}

.highlight-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.highlight-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.highlight-item strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--dark);
}

.highlight-item p {
    font-size: 0.875rem;
    margin: 0;
}

.experience-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.experience-card h4 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gray-lighter);
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.5rem;
    top: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray-light);
    border: 2px solid white;
}

.timeline-item.active::before {
    background: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.timeline-year {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--primary-light);
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-item strong {
    display: block;
    margin-bottom: 0.25rem;
}

.timeline-item p {
    font-size: 0.875rem;
    color: var(--gray);
    margin: 0;
}

/* Portfolio Section */
.portfolio {
    background: white;
}

.portfolio-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: 2px solid var(--gray-lighter);
    border-radius: 50px;
    color: var(--gray);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

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

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

.portfolio-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--gray-lighter);
}

.portfolio-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-header {
    padding: 1.5rem 1.5rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-badge {
    padding: 0.25rem 0.75rem;
    background: var(--primary-light);
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.card-badge.api {
    background: var(--accent);
}

.card-badge.support {
    background: var(--success);
}

.card-badge.compliance {
    background: var(--warning);
}

.card-time {
    font-size: 0.875rem;
    color: var(--gray-light);
}

.card-title {
    padding: 1rem 1.5rem 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark);
}

.card-description {
    padding: 1rem 1.5rem;
    color: var(--gray);
    line-height: 1.6;
}

.card-metrics {
    padding: 0 1.5rem;
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--gray);
}

.card-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--gray-lighter);
}

.card-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.card-link:hover {
    gap: 1rem;
}

.portfolio-cta {
    text-align: center;
    margin-top: 3rem;
}

/* Skills Section */
.skills {
    background: var(--off-white);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.skill-category h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

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

.skill-tag {
    padding: 0.5rem 1rem;
    background: var(--gray-lighter);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--dark);
    transition: var(--transition);
}

.skill-tag:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.05);
}

/* CTA Section */
.cta-section {
    background: var(--gradient-primary);
    color: white;
    text-align: center;
    padding: 4rem 0;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

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

.cta-section .btn-primary:hover {
    background: var(--off-white);
}

.cta-section .btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

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

/* Contact Section */
.contact {
    background: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.contact-info p {
    color: var(--gray);
    margin-bottom: 2rem;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: var(--dark);
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateX(5px);
}

.contact-icon {
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-lighter);
    border-radius: 10px;
}

.contact-item:hover .contact-icon {
    background: var(--primary);
    color: white;
}

.contact-item strong {
    display: block;
    margin-bottom: 0.25rem;
}

.contact-item span {
    color: var(--gray);
    font-size: 0.875rem;
}

.contact-card {
    background: var(--off-white);
    padding: 2rem;
    border-radius: 12px;
}

.contact-card h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.focus-list {
    list-style: none;
    margin-bottom: 2rem;
}

.focus-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-lighter);
    position: relative;
    padding-left: 1.5rem;
}

.focus-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

.availability {
    text-align: center;
}

.available-badge {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--success);
    color: white;
    border-radius: 50px;
    font-weight: 600;
}

/* Footer */
.footer {
    background: var(--dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

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

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

.footer-bottom {
    text-align: center;
    padding-top: 1rem;
    color: var(--gray-light);
    font-size: 0.875rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-tabs {
        flex-wrap: wrap;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    section {
        padding: 3rem 0;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--off-white);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}