/* ==========================================================================
   Assembly Labs - Styles
   ========================================================================== */

/* ==========================================================================
   CSS Variables
   ========================================================================== */

:root {
    /* Dark Mode Base */
    --color-bg-primary: #0a0a0b;
    --color-bg-secondary: #111113;
    --color-bg-tertiary: #18181b;
    --color-bg-elevated: #1f1f23;

    /* Text Colors */
    --color-text-primary: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-tertiary: #71717a;

    /* Brand Colors - Blue Palette */
    --color-accent: #0ea5e9;
    --color-accent-dim: rgba(14, 165, 233, 0.1);
    --color-accent-glow: rgba(14, 165, 233, 0.15);

    /* Gradient for text and accents */
    --gradient-brand: linear-gradient(135deg, #0ea5e9 0%, #3b82f6 100%);

    /* Borders */
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);

    /* Typography */
    --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-secondary: 'Libre Baskerville', Georgia, serif;

    /* Spacing - Tightened */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 2.5rem;
    --spacing-3xl: 3.5rem;
    --spacing-4xl: 5rem;

    /* Animation */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --duration-fast: 0.2s;
    --duration-normal: 0.4s;
    --duration-slow: 0.8s;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ==========================================================================
   Animations
   ========================================================================== */

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

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

@keyframes scrollPulse {
    0%, 100% {
        opacity: 0.3;
        transform: scaleY(1);
    }
    50% {
        opacity: 1;
        transform: scaleY(1.2);
    }
}

/* Reveal Animation Classes */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--duration-slow) var(--ease-out-expo),
                transform var(--duration-slow) var(--ease-out-expo);
}

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

.reveal-stagger {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--ease-out-expo),
                transform 0.6s var(--ease-out-expo);
}

.reveal-stagger.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    background: transparent;
    transition: background var(--duration-normal) var(--ease-out-quart),
                backdrop-filter var(--duration-normal) var(--ease-out-quart);
}

.navbar.scrolled {
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
}

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

.nav-brand {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-primary);
    text-decoration: none;
    letter-spacing: 0.05em;
    transition: opacity var(--duration-fast);
}

.nav-brand:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color var(--duration-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width var(--duration-normal) var(--ease-out-expo);
}

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

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

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-text-primary);
    color: var(--color-bg-primary);
    padding: 0.625rem 1.25rem;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--duration-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--duration-fast);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, var(--color-accent-glow), transparent),
        radial-gradient(ellipse 60% 40% at 100% 50%, rgba(59, 130, 246, 0.08), transparent),
        radial-gradient(ellipse 50% 30% at 0% 80%, rgba(14, 165, 233, 0.05), transparent);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
}

.hero-label {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.2s forwards;
}

.hero-label::before {
    content: '';
    width: 24px;
    height: 1px;
    background: var(--color-accent);
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1.1;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.3s forwards;
}

.hero-description {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    line-height: 1.6;
    color: var(--color-text-secondary);
    max-width: 680px;
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.4s forwards;
}

.hero-cta-group {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.5s forwards;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--color-text-primary);
    color: var(--color-bg-primary);
    padding: 1rem 1.75rem;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--duration-fast);
}

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

.btn-primary svg {
    width: 16px;
    height: 16px;
    transition: transform var(--duration-fast);
}

.btn-primary:hover svg {
    transform: translateX(4px);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: transparent;
    color: var(--color-text-primary);
    padding: 1rem 1.75rem;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid var(--color-border-hover);
    transition: all var(--duration-fast);
}

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

/* ==========================================================================
   Scroll Indicator
   ========================================================================== */

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    opacity: 0;
    animation: fadeIn 1s var(--ease-out-expo) 1s forwards;
}

.scroll-indicator span {
    font-size: 12px;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-text-tertiary), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

/* ==========================================================================
   Section Styles
   ========================================================================== */

section {
    padding: var(--spacing-4xl) 0;
    position: relative;
}

.section-header {
    margin-bottom: var(--spacing-2xl);
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--spacing-md);
}

.section-label::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.15;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: 1.125rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    max-width: 600px;
}

/* ==========================================================================
   About Section
   ========================================================================== */

.about {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-content p {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.about-content p:last-of-type {
    margin-bottom: 0;
}

.about-quote {
    position: relative;
    padding: var(--spacing-lg);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
}

.about-quote::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: var(--spacing-lg);
    font-size: 4rem;
    font-family: var(--font-secondary);
    color: var(--color-accent);
    opacity: 0.3;
    line-height: 1;
}

.about-quote p {
    font-family: var(--font-secondary);
    font-style: italic;
    font-size: 1.25rem;
    line-height: 1.5;
    color: var(--color-text-primary);
}

/* ==========================================================================
   Services Section
   ========================================================================== */

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--color-border);
    border: 1px solid var(--color-border);
}

.service-card {
    background: var(--color-bg-primary);
    padding: var(--spacing-xl);
    transition: background var(--duration-normal) var(--ease-out-quart);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-normal) var(--ease-out-expo);
}

.service-card:hover {
    background: var(--color-bg-secondary);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-number {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-md);
    font-variant-numeric: tabular-nums;
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.service-card p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.55;
}

/* ==========================================================================
   Differentiators Section
   ========================================================================== */

.differentiators {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.diff-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.diff-card {
    padding: var(--spacing-xl);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    transition: all var(--duration-normal) var(--ease-out-quart);
}

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

.diff-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-dim);
    margin-bottom: var(--spacing-md);
}

.diff-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-accent);
}

.diff-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.diff-card p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.55;
}

/* ==========================================================================
   Process Section
   ========================================================================== */

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

.process-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.process-text p {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

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

.process-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    color: var(--color-text-secondary);
    font-size: 15px;
}

.process-list li::before {
    content: '';
    flex-shrink: 0;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    margin-top: 0.5rem;
}

.process-visual {
    position: relative;
}

.process-flow {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.process-step {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    margin-bottom: -1px;
    transition: all var(--duration-normal) var(--ease-out-quart);
}

.process-step:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-accent);
    z-index: 1;
}

.step-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-accent);
    font-variant-numeric: tabular-nums;
}

.process-step:hover .step-number {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    border-color: var(--color-accent);
}

.step-content h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-primary);
}

/* ==========================================================================
   CTA Section
   ========================================================================== */

.cta {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 40% at 50% 100%, var(--color-accent-glow), transparent);
    pointer-events: none;
}

.cta-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    margin: 0 auto;
}

.cta .section-title {
    margin-bottom: var(--spacing-md);
}

.cta .section-description {
    max-width: 500px;
    margin: 0 auto var(--spacing-lg);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    background: var(--color-bg-primary);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
}

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

.footer-brand {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.footer-info {
    display: flex;
    gap: var(--spacing-xl);
    font-size: 14px;
    color: var(--color-text-tertiary);
}

.footer-info a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--duration-fast);
}

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

/* ==========================================================================
   Responsive - Tablet
   ========================================================================== */

@media (max-width: 1024px) {
    .about-grid,
    .process-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

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

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

/* ==========================================================================
   Responsive - Mobile
   ========================================================================== */

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--color-bg-primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-lg);
        transition: right var(--duration-normal) var(--ease-out-expo);
    }

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

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    section {
        padding: var(--spacing-2xl) 0;
    }

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

    .hero-cta-group {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary {
        justify-content: center;
    }

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

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

    .scroll-indicator {
        display: none;
    }
}

/* ==========================================================================
   Accessibility - Reduced Motion
   ========================================================================== */

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

    html {
        scroll-behavior: auto;
    }

    .reveal,
    .reveal-stagger {
        opacity: 1;
        transform: none;
    }
}