/* ============================================
   DESIGN SYSTEM - CSS Variables
   ============================================ */
:root {
    /* Colors */
    --color-bg: #0a0a0f;
    --color-bg-secondary: #121218;
    --color-text: #e4e4e7;
    --color-text-secondary: #a1a1aa;
    --color-accent: #8b5cf6;
    --color-accent-secondary: #3b82f6;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    --gradient-secondary: linear-gradient(135deg, #ec4899 0%, #8b5cf6 100%);
    --gradient-subtle: linear-gradient(180deg, rgba(139, 92, 246, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;

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

/* ============================================
   RESET & BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

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

::selection {
    background: var(--color-accent);
    color: white;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(10, 10, 15, 0.8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color var(--transition-base);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-links a:hover {
    color: var(--color-text);
}

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

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    z-index: 1;
}

.hero-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #a1a1aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
    line-height: 1.8;
}

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

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
    cursor: pointer;
    border: none;
    display: inline-block;
    will-change: transform;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    background: rgba(139, 92, 246, 0.1);
}

/* ============================================
   TERMINAL MOCKUP
   ============================================ */
.hero-visual {
    margin-top: 4rem;
    width: 100%;
    max-width: 800px;
    z-index: 1;
}

.terminal-mockup {
    background: var(--color-bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.terminal-header {
    background: rgba(255, 255, 255, 0.05);
    padding: 0.75rem 1rem;
    display: flex;
    gap: 0.5rem;
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }

.terminal-body {
    padding: 2rem;
    font-family: var(--font-mono);
    font-size: 0.95rem;
}

.terminal-line {
    margin-bottom: 1.5rem;
}

.prompt {
    color: var(--color-accent);
    margin-right: 0.5rem;
}

.command {
    color: var(--color-text);
}

.terminal-output {
    margin-top: 1rem;
}

.output-line {
    color: var(--color-text-secondary);
    margin: 0.5rem 0;
}

.output-line.success {
    color: #27c93f;
    font-weight: 600;
}

/* Typing Animation */
.typing-animation {
    display: inline-block;
    overflow: hidden;
    border-right: 2px solid var(--color-accent);
    white-space: nowrap;
    animation: typing 3s steps(50, end), blink 0.75s step-end infinite;
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink {
    50% { border-color: transparent; }
}

/* ============================================
   SCROLL INDICATOR
   ============================================ */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.scroll-line {
    width: 100%;
    height: 30%;
    background: var(--gradient-primary);
    animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(300%); }
}

/* ============================================
   SECTION UTILITIES
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

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

.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.25rem;
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: 4rem;
}

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

/* ============================================
   EVOLUTION SECTION
   ============================================ */
.evolution {
    background: var(--gradient-subtle);
}

.evolution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.evolution-card {
    background: var(--color-bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 3rem 2rem;
    text-align: center;
    transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
    will-change: transform;
}

.evolution-card:hover {
    transform: translateY(-8px);
    border-color: rgba(139, 92, 246, 0.5);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.2);
}

.evolution-card.active {
    border-color: var(--color-accent);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
}

.evolution-year {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
}

.evolution-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.evolution-icon {
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
}

.cli-mockup {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: #27c93f;
}

.gui-mockup {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.gui-window {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.nli-mockup {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
}

.nli-wave {
    width: 8px;
    background: var(--gradient-primary);
    border-radius: 4px;
    animation: wave 1s ease-in-out infinite;
}

.nli-wave:nth-child(1) { height: 30px; animation-delay: 0s; }
.nli-wave:nth-child(2) { height: 50px; animation-delay: 0.2s; }
.nli-wave:nth-child(3) { height: 40px; animation-delay: 0.4s; }

@keyframes wave {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(0.5); }
}

.evolution-desc {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

/* ============================================
   PROBLEM SECTION
   ============================================ */
.problem {
    text-align: center;
}

.problem-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
}

.stat-card {
    padding: 2rem;
    background: var(--color-bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    transition: transform var(--transition-base), border-color var(--transition-base);
    will-change: transform;
}

.stat-card:hover {
    border-color: rgba(139, 92, 246, 0.5);
    transform: translateY(-4px);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

.problem-text {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

.problem-text strong {
    color: var(--color-text);
    font-weight: 700;
}

/* ============================================
   COMPARISON SECTION
   ============================================ */
.comparison {
    background: var(--color-bg-secondary);
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 3rem;
    align-items: center;
    margin: 4rem 0;
}

.comparison-column {
    background: var(--color-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 3rem;
}

.comparison-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 2rem;
    font-weight: 600;
}

.workflow-steps {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.workflow-step {
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.workflow-command {
    margin-bottom: 2rem;
}

.command-box {
    padding: 1.5rem;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 12px;
    font-family: var(--font-mono);
    font-size: 0.95rem;
}

.command-prompt {
    color: var(--color-accent);
    margin-right: 0.5rem;
}

.command-text {
    color: var(--color-text);
}

.workflow-result {
    margin-bottom: 2rem;
}

.result-line {
    font-size: 1.25rem;
    color: #27c93f;
    font-weight: 600;
}

.workflow-time {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.workflow-time.success {
    color: #27c93f;
}

.comparison-arrow {
    font-size: 2rem;
    color: var(--color-accent);
}

.comparison-footer {
    text-align: center;
    margin-top: 4rem;
}

.comparison-tagline {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

/* ============================================
   WHY NOW SECTION
   ============================================ */
.convergence-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.convergence-card {
    background: var(--color-bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 3rem 2rem;
    transition: transform var(--transition-base), border-color var(--transition-base);
    will-change: transform;
}

.convergence-card:hover {
    border-color: rgba(139, 92, 246, 0.5);
    transform: translateY(-4px);
}

.convergence-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.convergence-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.convergence-desc {
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.convergence-detail {
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.convergence-detail strong {
    color: var(--color-text);
    font-weight: 600;
}

/* ============================================
   TIMELINE SECTION
   ============================================ */
.timeline {
    background: var(--gradient-subtle);
}

.timeline-track {
    position: relative;
    max-width: 800px;
    margin: 4rem auto 0;
}

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

.timeline-item {
    position: relative;
    padding-left: 4rem;
    margin-bottom: 4rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 0;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-accent);
    box-shadow: 0 0 0 4px var(--color-bg), 0 0 20px rgba(139, 92, 246, 0.5);
}

.timeline-year {
    font-size: 0.875rem;
    color: var(--color-accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 0.5rem;
}

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.timeline-content p {
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.timeline-example {
    padding: 1rem 1.5rem;
    background: var(--color-bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    margin-top: 1rem;
}

.timeline-example code {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--color-accent);
}

.timeline-quote {
    padding: 1.5rem;
    background: rgba(139, 92, 246, 0.1);
    border-left: 3px solid var(--color-accent);
    border-radius: 8px;
    font-style: italic;
    color: var(--color-text-secondary);
}

.timeline-quote em {
    color: var(--color-text);
    font-weight: 600;
}

/* ============================================
   PHILOSOPHY SECTION
   ============================================ */
.philosophy {
    background: var(--color-bg-secondary);
    text-align: center;
}

.philosophy-content {
    max-width: 900px;
    margin: 0 auto;
}

.philosophy-quote {
    font-size: 1.5rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
}

.philosophy-quote p {
    margin-bottom: 2rem;
}

.quote-question {
    color: var(--color-text);
    font-style: italic;
}

.philosophy-quote em {
    color: var(--color-accent);
    font-style: italic;
}

.philosophy-quote .highlight {
    font-size: 2rem;
    color: var(--color-text);
    font-weight: 700;
    font-style: normal;
}

.philosophy-divider {
    width: 100px;
    height: 2px;
    background: var(--gradient-primary);
    margin: 4rem auto;
}

/* ============================================
   BELIEF SECTION
   ============================================ */
.belief {
    text-align: center;
}

.belief-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
}

.belief-pillars {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.pillar {
    background: var(--color-bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 3rem 2rem;
    transition: transform var(--transition-base), border-color var(--transition-base);
    will-change: transform;
}

.pillar:hover {
    border-color: rgba(139, 92, 246, 0.5);
    transform: translateY(-4px);
}

.pillar-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.pillar h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.pillar p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-bg-secondary);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.footer-tagline {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.footer-right a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-in {
    animation: fadeIn 1s ease-out;
}

.fade-in-up {
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

.fade-in-up-delay {
    animation: fadeInUp 1s ease-out 0.4s backwards;
}

.fade-in-up-delay-2 {
    animation: fadeInUp 1s ease-out 0.6s backwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* Reveal on Scroll */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    will-change: opacity, transform;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
    will-change: auto;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .comparison-arrow {
        transform: rotate(90deg);
        justify-self: center;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 4rem;
    }

    .nav-container {
        padding: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-links a {
        font-size: 0.875rem;
    }

    .hero {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

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

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .btn {
        width: 100%;
    }

    .section-title {
        font-size: 2rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    .evolution-grid,
    .convergence-grid,
    .belief-pillars {
        grid-template-columns: 1fr;
    }

    .waitlist-form {
        flex-direction: column;
    }

    .email-input {
        width: 100%;
    }

    .terminal-body {
        padding: 1rem;
        font-size: 0.8rem;
    }

    .philosophy-quote {
        font-size: 1.125rem;
    }

    .philosophy-quote .highlight {
        font-size: 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

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

    .hero-title {
        font-size: 2rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .comparison-column {
        padding: 1.5rem;
    }

    .timeline-item {
        padding-left: 2rem;
    }
}