/* ============================================
   CSS Variables & Reset
   ============================================ */
:root {
    /* Colors */
    --color-bg: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-bg-tertiary: #1a1a1a;
    --color-text: #fafafa;
    --color-text-secondary: #a1a1a1;
    --color-text-muted: #525252;
    --color-accent: #e5e5e5;
    --color-border: #262626;
    --color-border-light: #404040;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

::selection {
    background: var(--color-text);
    color: var(--color-bg);
}

a {
    color: inherit;
    text-decoration: none;
}

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

/* ============================================
   Custom Cursor
   ============================================ */
.cursor-follower {
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: transform 0.1s ease, width 0.2s ease, height 0.2s ease, background 0.2s ease;
    mix-blend-mode: difference;
}

.cursor-follower.hover {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: linear-gradient(to bottom, var(--color-bg) 0%, transparent 100%);
}

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

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

.logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--color-bg-secondary);
    padding: var(--spacing-xs);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
    background: var(--color-bg-tertiary);
}

.nav-link svg {
    width: 18px;
    height: 18px;
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-text);
    color: var(--color-bg);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition-base);
}

.nav-cta:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.2);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--spacing-4xl);
    padding: var(--spacing-4xl) var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    width: fit-content;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.title-line {
    display: block;
    overflow: hidden;
}

.word {
    display: inline-block;
    margin-right: 0.3em;
    transform: translateY(100%);
    animation: slideUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.title-line:nth-child(1) .word { animation-delay: 0.1s; }
.title-line:nth-child(2) .word:nth-child(1) { animation-delay: 0.2s; }
.title-line:nth-child(2) .word:nth-child(2) { animation-delay: 0.3s; }
.title-line:nth-child(3) .word { animation-delay: 0.4s; }

@keyframes slideUp {
    to { transform: translateY(0); }
}

.word.highlight {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 450px;
    line-height: 1.7;
}

.hero-scroll {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-full);
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-dot {
    width: 4px;
    height: 8px;
    background: var(--color-text-secondary);
    border-radius: var(--radius-full);
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(12px); opacity: 0.3; }
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-container {
    position: relative;
    width: 400px;
    height: 500px;
}

.hero-image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 6rem;
    font-weight: 700;
    color: var(--color-border-light);
    position: relative;
    overflow: hidden;
}

.hero-image-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.1) 100%);
}

.hero-image-decoration {
    position: absolute;
    width: 120%;
    height: 120%;
    top: -10%;
    left: -10%;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transform: rotate(-3deg);
    z-index: -1;
}

/* ============================================
   Skills Bar (Marquee)
   ============================================ */
.skills-bar {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    overflow: hidden;
}

.skills-track {
    display: flex;
    width: max-content;
    animation: marquee 30s linear infinite;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.skills-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    padding: 0 var(--spacing-xl);
}

.skill-item {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.skill-divider {
    color: var(--color-text-muted);
}

/* ============================================
   Section Styles
   ============================================ */
section {
    padding: var(--spacing-4xl) var(--spacing-xl);
}

.section-header {
    max-width: 1400px;
    margin: 0 auto var(--spacing-3xl);
}

.section-label {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
}

.service-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
    transition: var(--transition-slow);
}

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

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0;
    transition: var(--transition-base);
}

.service-card:hover::before {
    opacity: 1;
}

.service-number {
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.service-icon {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.service-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

.service-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.service-list li {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    font-size: 0.813rem;
    color: var(--color-text-secondary);
}

/* ============================================
   Work Section
   ============================================ */
.work {
    background: var(--color-bg-secondary);
}

.work-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
}

.work-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-slow);
}

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

.work-card-large {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1.5fr 1fr;
}

.work-card-wide {
    grid-column: span 2;
}

.work-image {
    position: relative;
    overflow: hidden;
}

.work-card:not(.work-card-large) .work-image {
    aspect-ratio: 16/10;
}

.work-card-large .work-image {
    min-height: 400px;
}

.work-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-slow);
}

.work-card:hover .work-image-placeholder {
    transform: scale(1.05);
}

.work-info {
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.work-card-large .work-info {
    justify-content: center;
}

.work-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.work-tag {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.work-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
}

.work-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.work-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-top: var(--spacing-md);
    transition: var(--transition-base);
}

.work-link:hover {
    gap: var(--spacing-md);
}

.work-link svg {
    transition: var(--transition-base);
}

.work-link:hover svg {
    transform: translate(2px, -2px);
}

.work-cta {
    text-align: center;
    margin-top: var(--spacing-3xl);
}

/* ============================================
   Lab Section
   ============================================ */
.lab {
    background: var(--color-bg);
}

.lab-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
}

.lab-item {
    cursor: pointer;
    transition: var(--transition-base);
}

.lab-item:hover {
    transform: translateY(-4px);
}

.lab-preview {
    aspect-ratio: 4/3;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    transition: var(--transition-base);
}

.lab-item:hover .lab-preview {
    border-color: var(--color-border-light);
}

.lab-icon {
    font-size: 3rem;
}

.lab-title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.lab-description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    background: var(--color-bg-secondary);
    text-align: center;
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.contact-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.contact-text {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    line-height: 1.7;
    max-width: 500px;
}

.contact-socials {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-text-secondary);
    transition: var(--transition-base);
}

.social-link:hover {
    color: var(--color-text);
    border-color: var(--color-border-light);
    transform: translateY(-2px);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.2);
}

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

.btn-outline:hover {
    border-color: var(--color-text);
    background: var(--color-text);
    color: var(--color-bg);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-bg);
    padding: var(--spacing-2xl) var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-left {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
}

.footer-copy {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.footer-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ============================================
   Responsive Styles
   ============================================ */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-2xl);
    }

    .hero-content {
        align-items: center;
    }

    .hero-subtitle {
        margin: 0 auto;
    }

    .hero-visual {
        order: -1;
    }

    .hero-image-container {
        width: 300px;
        height: 350px;
    }

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

    .work-card-large,
    .work-card-wide {
        grid-column: span 1;
    }

    .work-card-large {
        display: block;
    }

    .work-card-large .work-image {
        min-height: 250px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

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

    .footer-right {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* ============================================
   Animation Classes (for GSAP)
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(40px);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.stagger-item {
    opacity: 0;
    transform: translateY(20px);
}