/* Design System Variables */
:root {
    /* Colors - Black/White/Grey Theme */
    --color-primary: #000000;
    --color-on-primary: #FFFFFF;
    --color-secondary: #404040;
    --color-on-secondary: #FFFFFF;
    --color-accent: #000000;
    --color-on-accent: #FFFFFF;
    --color-background: #F5F5F5;
    --color-foreground: #000000;
    --color-card: #FFFFFF;
    --color-card-foreground: #000000;
    --color-muted: #E5E5E5;
    --color-muted-foreground: #737373;
    --color-border: #E5E5E5;
    --color-destructive: #DC2626;
    --color-on-destructive: #FFFFFF;
    --color-ring: #000000;

    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'DM Sans', sans-serif;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--color-background);
    color: var(--color-foreground);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) 0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-status {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--color-card);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: #10B981;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-text {
    font-size: 0.875rem;
    color: var(--color-foreground);
    font-weight: 500;
}

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

.nav-link {
    text-decoration: none;
    color: var(--color-foreground);
    font-weight: 500;
    transition: color var(--transition-fast);
    cursor: pointer;
    font-size: 0.9375rem;
}

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

.nav-link .count {
    color: var(--color-muted-foreground);
    font-size: 0.875rem;
}

.btn-primary {
    background: var(--color-foreground);
    color: var(--color-on-primary);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-base);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.btn-primary:hover {
    background: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl) var(--space-lg);
    padding-top: calc(var(--space-3xl) + 60px);
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(0, 0, 0, 0.03) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(0, 0, 0, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 1200px;
}

.hero-name {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 10vw, 8rem);
    font-weight: 700;
    line-height: 0.9;
    margin-bottom: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.name-first {
    color: transparent;
    -webkit-text-stroke: 2px var(--color-foreground);
    text-stroke: 2px var(--color-foreground);
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.name-last {
    color: var(--color-foreground);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

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

.hero-info {
    margin-bottom: var(--space-xl);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: var(--space-sm);
    color: var(--color-foreground);
}

.hero-tagline {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-muted-foreground);
    margin-bottom: var(--space-lg);
}

.btn-cta {
    background: var(--color-foreground);
    color: var(--color-on-primary);
    padding: var(--space-sm) var(--space-xl);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    transition: all var(--transition-base);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.btn-cta::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.btn-cta:hover {
    background: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.btn-cta:hover::after {
    transform: translateX(4px);
}

.hero-social {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.6s forwards;
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    text-decoration: none;
    color: var(--color-foreground);
    transition: all var(--transition-base);
    cursor: pointer;
    font-weight: 500;
}

.social-link:hover {
    background: var(--color-foreground);
    color: var(--color-on-primary);
    border-color: var(--color-foreground);
    transform: translateY(-2px);
}

/* Section Styles */
.section-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-lg);
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--space-xl);
    color: var(--color-foreground);
}

/* Experience Section */
.experience {
    background: var(--color-card);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.experience-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: var(--space-lg);
}

.experience-years {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-foreground);
}

.experience-content {
    background: var(--color-foreground);
    border-radius: var(--radius-lg);
    padding: var(--space-3xl);
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.experience-empty {
    text-align: center;
    color: var(--color-muted);
}

.empty-icon {
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.empty-text {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.empty-subtext {
    font-size: 1rem;
    opacity: 0.7;
}

/* Services Section */
.services {
    background: var(--color-background);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.service-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-3xl);
    background: var(--color-card);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
}

/* Portfolio Section */
.portfolio {
    background: var(--color-card);
    border-top: 1px solid var(--color-border);
}

.portfolio-filters {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--space-xs) var(--space-md);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-foreground);
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 500;
    transition: all var(--transition-base);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--color-foreground);
    color: var(--color-on-primary);
    border-color: var(--color-foreground);
}

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

.portfolio-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-3xl);
    background: var(--color-muted);
    border-radius: var(--radius-lg);
}

/* Contact Section */
.contact {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: var(--color-background);
    position: relative;
    padding: var(--space-3xl) var(--space-lg);
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 0.02) 0%, transparent 70%);
    pointer-events: none;
}

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

.contact-status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--color-card);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    margin-bottom: var(--space-xl);
}

.contact-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--color-foreground);
}

.contact-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-muted-foreground);
    margin-bottom: var(--space-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.btn-contact {
    background: var(--color-foreground);
    color: var(--color-on-primary);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    transition: all var(--transition-base);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.btn-contact::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.btn-contact:hover {
    background: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.btn-contact:hover::after {
    transform: translateX(4px);
}

.contact-footer {
    max-width: 1400px;
    margin: var(--space-3xl) auto 0;
    padding: var(--space-xl) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--color-border);
}

.footer-profile {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.profile-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #000000, #404040);
    border-radius: 50%;
}

.profile-name {
    font-weight: 600;
    color: var(--color-foreground);
}

.footer-social {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    text-decoration: none;
    color: var(--color-foreground);
    transition: all var(--transition-base);
    cursor: pointer;
    font-weight: 500;
}

.footer-link:hover {
    background: var(--color-foreground);
    color: var(--color-on-primary);
    border-color: var(--color-foreground);
    transform: translateY(-2px);
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        gap: var(--space-sm);
    }

    .nav-link span {
        display: none;
    }

    .hero {
        padding: var(--space-2xl) var(--space-md);
        padding-top: calc(var(--space-2xl) + 60px);
    }

    .hero-name {
        gap: var(--space-xs);
    }

    .hero-social {
        gap: var(--space-xs);
    }

    .social-link span,
    .footer-link span {
        display: none;
    }

    .section-container {
        padding: var(--space-2xl) var(--space-md);
    }

    .experience-content {
        padding: var(--space-xl);
    }

    .contact-footer {
        flex-direction: column;
        gap: var(--space-lg);
        text-align: center;
    }

    .footer-social {
        justify-content: center;
    }

    .portfolio-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav-link .count {
        display: none;
    }

    .nav-links .nav-link:not(:first-child) {
        display: none;
    }
}